diff --git a/.ci/before_build_wheel.sh b/.ci/before_build_wheel.sh
new file mode 100644
index 0000000000..56108dcd60
--- /dev/null
+++ b/.ci/before_build_wheel.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+set -xeu
+
+# On 32-bit Linux platforms, we need libatomic1 to use rustup
+if command -v yum &> /dev/null; then
+   yum install -y libatomic
+fi
+
+# Install a Rust toolchain
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.82.0 -y --profile minimal
diff --git a/.ci/scripts/calculate_jobs.py b/.ci/scripts/calculate_jobs.py
index ea278173db..5249acdc5d 100755
--- a/.ci/scripts/calculate_jobs.py
+++ b/.ci/scripts/calculate_jobs.py
@@ -60,7 +60,7 @@ trial_postgres_tests = [
     {
         "python-version": "3.9",
         "database": "postgres",
-        "postgres-version": "11",
+        "postgres-version": "13",
         "extras": "all",
     }
 ]
diff --git a/.ci/scripts/check_lockfile.py b/.ci/scripts/check_lockfile.py
index 19cec7ddd6..46d3952b4c 100755
--- a/.ci/scripts/check_lockfile.py
+++ b/.ci/scripts/check_lockfile.py
@@ -11,12 +11,12 @@ with open("poetry.lock", "rb") as f:
 
 try:
     lock_version = lockfile["metadata"]["lock-version"]
-    assert lock_version == "2.0"
+    assert lock_version == "2.1"
 except Exception:
     print(
         """\
-    Lockfile is not version 2.0. You probably need to upgrade poetry on your local box
-    and re-run `poetry lock --no-update`. See the Poetry cheat sheet at
+    Lockfile is not version 2.1. You probably need to upgrade poetry on your local box
+    and re-run `poetry lock`. See the Poetry cheat sheet at
     https://element-hq.github.io/synapse/develop/development/dependencies.html
     """
     )
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index ebf866e3d5..052dcf800b 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -14,26 +14,26 @@ permissions:
   id-token: write # needed for signing the images with GitHub OIDC Token
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Set up QEMU
         id: qemu
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
         with:
           platforms: arm64
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
 
       - name: Inspect builder
         run: docker buildx inspect
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3.7.0
+        uses: sigstore/cosign-installer@d7d6bc7722e3daa8354c50bcb52f4837da5e9b6a # v3.8.1
 
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Extract version from pyproject.toml
         # Note: explicitly requesting bash will mean bash is invoked with `-eo pipefail`, see
@@ -43,13 +43,13 @@ jobs:
           echo "SYNAPSE_VERSION=$(grep "^version" pyproject.toml | sed -E 's/version\s*=\s*["]([^"]*)["]/\1/')" >> $GITHUB_ENV
 
       - name: Log in to DockerHub
-        uses: docker/login-action@v3
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Log in to GHCR
-        uses: docker/login-action@v3
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -57,7 +57,7 @@ jobs:
 
       - name: Calculate docker image tag
         id: set-tag
-        uses: docker/metadata-action@master
+        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
         with:
           images: |
             docker.io/matrixdotorg/synapse
@@ -72,7 +72,7 @@ jobs:
 
       - name: Build and push all platforms
         id: build-and-push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@471d1dc4e07e5cdedd4c2171150001c434f0b7a4 # v6.15.0
         with:
           push: true
           labels: |
diff --git a/.github/workflows/docs-pr-netlify.yaml b/.github/workflows/docs-pr-netlify.yaml
index 6d184a21e0..d1b789c8d0 100644
--- a/.github/workflows/docs-pr-netlify.yaml
+++ b/.github/workflows/docs-pr-netlify.yaml
@@ -14,7 +14,7 @@ jobs:
       # There's a 'download artifact' action, but it hasn't been updated for the workflow_run action
       # (https://github.com/actions/download-artifact/issues/60) so instead we get this mess:
       - name: 📥 Download artifact
-        uses: dawidd6/action-download-artifact@bf251b5aa9c2f7eeb574a96ee720e24f801b7c11 # v6
+        uses: dawidd6/action-download-artifact@20319c5641d495c8a52e688b7dc5fada6c3a9fbc # v8
         with:
           workflow: docs-pr.yaml
           run_id: ${{ github.event.workflow_run.id }}
@@ -22,7 +22,7 @@ jobs:
           path: book
 
       - name: 📤 Deploy to Netlify
-        uses: matrix-org/netlify-pr-preview@v3
+        uses: matrix-org/netlify-pr-preview@9805cd123fc9a7e421e35340a05e1ebc5dee46b5 # v3
         with:
           path: book
           owner: ${{ github.event.workflow_run.head_repository.owner.login }}
diff --git a/.github/workflows/docs-pr.yaml b/.github/workflows/docs-pr.yaml
index 07dc301b1a..1b416407d8 100644
--- a/.github/workflows/docs-pr.yaml
+++ b/.github/workflows/docs-pr.yaml
@@ -13,7 +13,7 @@ jobs:
     name: GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           # Fetch all history so that the schema_versions script works.
           fetch-depth: 0
@@ -24,7 +24,7 @@ jobs:
           mdbook-version: '0.4.17'
 
       - name: Setup python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
 
@@ -39,7 +39,7 @@ jobs:
           cp book/welcome_and_overview.html book/index.html
 
       - name: Upload Artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         with:
           name: book
           path: book
@@ -50,7 +50,7 @@ jobs:
     name: Check links in documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Setup mdbook
         uses: peaceiris/actions-mdbook@ee69d230fe19748b7abf22df32acaa93833fad08 # v2.0.0
diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index 434dcbb6c7..121c29571a 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -50,7 +50,7 @@ jobs:
     needs:
       - pre
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           # Fetch all history so that the schema_versions script works.
           fetch-depth: 0
@@ -64,7 +64,7 @@ jobs:
         run: echo 'window.SYNAPSE_VERSION = "${{ needs.pre.outputs.branch-version }}";' > ./docs/website_files/version.js
 
       - name: Setup python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
 
diff --git a/.github/workflows/fix_lint.yaml b/.github/workflows/fix_lint.yaml
index 909b0a847f..fe699c1b2f 100644
--- a/.github/workflows/fix_lint.yaml
+++ b/.github/workflows/fix_lint.yaml
@@ -13,21 +13,22 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@master
+        uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0 # master (rust 1.85.1)
         with:
           # We use nightly so that `fmt` correctly groups together imports, and
           # clippy correctly fixes up the benchmarks.
           toolchain: nightly-2022-12-01
-          components: rustfmt
-      - uses: Swatinem/rust-cache@v2
+          components: clippy, rustfmt
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - name: Setup Poetry
-        uses: matrix-org/setup-python-poetry@v1
+        uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           install-project: "false"
+          poetry-version: "2.1.1"
 
       - name: Run ruff check
         continue-on-error: true
@@ -43,6 +44,6 @@ jobs:
       - run: cargo fmt
         continue-on-error: true
 
-      - uses: stefanzweifel/git-auto-commit-action@v5
+      - uses: stefanzweifel/git-auto-commit-action@e348103e9026cc0eee72ae06630dbe30c8bf7a79 # v5.1.0
         with:
           commit_message: "Attempt to fix linting"
diff --git a/.github/workflows/latest_deps.yml b/.github/workflows/latest_deps.yml
index 3884b6d402..b7c1b727c9 100644
--- a/.github/workflows/latest_deps.yml
+++ b/.github/workflows/latest_deps.yml
@@ -39,17 +39,17 @@ jobs:
     if: needs.check_repo.outputs.should_run_workflow == 'true'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable (rust 1.85.1)
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       # The dev dependencies aren't exposed in the wheel metadata (at least with current
       # poetry-core versions), so we install with poetry.
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: "3.x"
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: "all"
       # Dump installed versions for debugging.
       - run: poetry run pip list > before.txt
@@ -72,11 +72,11 @@ jobs:
             postgres-version: "14"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable (rust 1.85.1)
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - run: sudo apt-get -qq install xmlsec1
       - name: Set up PostgreSQL ${{ matrix.postgres-version }}
@@ -86,7 +86,7 @@ jobs:
             -e POSTGRES_PASSWORD=postgres \
             -e POSTGRES_INITDB_ARGS="--lc-collate C --lc-ctype C --encoding UTF8" \
             postgres:${{ matrix.postgres-version }}
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
       - run: pip install .[all,test]
@@ -145,11 +145,11 @@ jobs:
       BLACKLIST: ${{ matrix.workers && 'synapse-blacklist-with-workers' }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable (rust 1.85.1)
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - name: Ensure sytest runs `pip install`
         # Delete the lockfile so sytest will `pip install` rather than `poetry install`
@@ -164,7 +164,7 @@ jobs:
         if: ${{ always() }}
         run: /sytest/scripts/tap_to_gha.pl /logs/results.tap
       - name: Upload SyTest logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         if: ${{ always() }}
         with:
           name: Sytest Logs - ${{ job.status }} - (${{ join(matrix.*, ', ') }})
@@ -192,15 +192,15 @@ jobs:
             database: Postgres
 
     steps:
-      - name: Run actions/checkout@v4 for synapse
-        uses: actions/checkout@v4
+      - name: Check out synapse codebase
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           path: synapse
 
       - name: Prepare Complement's Prerequisites
         run: synapse/.ci/scripts/setup_complement_prerequisites.sh
 
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5.4.0
         with:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
@@ -225,7 +225,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/poetry_lockfile.yaml b/.github/workflows/poetry_lockfile.yaml
index 496e536b93..b3251d379e 100644
--- a/.github/workflows/poetry_lockfile.yaml
+++ b/.github/workflows/poetry_lockfile.yaml
@@ -16,8 +16,8 @@ jobs:
     name: "Check locked dependencies have sdists"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: '3.x'
       - run: pip install tomli
diff --git a/.github/workflows/push_complement_image.yml b/.github/workflows/push_complement_image.yml
index 6fbd2ed015..7c8eb446cd 100644
--- a/.github/workflows/push_complement_image.yml
+++ b/.github/workflows/push_complement_image.yml
@@ -33,29 +33,29 @@ jobs:
       packages: write
     steps:
       - name: Checkout specific branch (debug build)
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         if: github.event_name == 'workflow_dispatch'
         with:
           ref: ${{ inputs.branch }}
       - name: Checkout clean copy of develop (scheduled build)
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         if: github.event_name == 'schedule'
         with:
           ref: develop
       - name: Checkout clean copy of master (on-push)
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         if: github.event_name == 'push'
         with:
           ref: master
       - name: Login to registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Work out labels for complement image
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
         with:
           images: ghcr.io/${{ github.repository }}/complement-synapse
           tags: |
diff --git a/.github/workflows/release-artifacts.yml b/.github/workflows/release-artifacts.yml
index 0c0e023c75..9985084a73 100644
--- a/.github/workflows/release-artifacts.yml
+++ b/.github/workflows/release-artifacts.yml
@@ -5,7 +5,7 @@ name: Build release artifacts
 on:
   # we build on PRs and develop to (hopefully) get early warning
   # of things breaking (but only build one set of debs). PRs skip
-  # building wheels on ARM.
+  # building wheels on macOS & ARM.
   pull_request:
   push:
     branches: ["develop", "release-*"]
@@ -27,8 +27,8 @@ jobs:
     name: "Calculate list of debian distros"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: '3.x'
       - id: set-distros
@@ -55,18 +55,18 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           path: src
 
       - name: Set up Docker Buildx
         id: buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
         with:
           install: true
 
       - name: Set up docker layer caching
-        uses: actions/cache@v4
+        uses: actions/cache@d4323d4df104b026a6aa633fdb11d772146be0bf # v4.2.2
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}
@@ -74,7 +74,7 @@ jobs:
             ${{ runner.os }}-buildx-
 
       - name: Set up python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: '3.x'
 
@@ -101,7 +101,7 @@ jobs:
           echo "ARTIFACT_NAME=${DISTRO#*:}" >> "$GITHUB_OUTPUT"
 
       - name: Upload debs as artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         with:
           name: debs-${{ steps.artifact-name.outputs.ARTIFACT_NAME }}
           path: debs/*
@@ -111,7 +111,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-22.04]
+        os: [ubuntu-22.04, macos-13]
         arch: [x86_64, aarch64]
         # is_pr is a flag used to exclude certain jobs from the matrix on PRs.
         # It is not read by the rest of the workflow.
@@ -119,25 +119,31 @@ jobs:
           - ${{ startsWith(github.ref, 'refs/pull/') }}
 
         exclude:
+          # Don't build macos wheels on PR CI.
+          - is_pr: true
+            os: "macos-13"
+          # Don't build aarch64 wheels on mac.
+          - os: "macos-13"
+            arch: aarch64
           # Don't build aarch64 wheels on PR CI.
           - is_pr: true
             arch: aarch64
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           # setup-python@v4 doesn't impose a default python version. Need to use 3.x
           # here, because `python` on osx points to Python 2.7.
           python-version: "3.x"
 
       - name: Install cibuildwheel
-        run: python -m pip install cibuildwheel==2.19.1
+        run: python -m pip install cibuildwheel==2.23.0
 
       - name: Set up QEMU to emulate aarch64
         if: matrix.arch == 'aarch64'
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
         with:
           platforms: arm64
 
@@ -159,7 +165,7 @@ jobs:
           CARGO_NET_GIT_FETCH_WITH_CLI: true
           CIBW_ENVIRONMENT_PASS_LINUX: CARGO_NET_GIT_FETCH_WITH_CLI
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         with:
           name: Wheel-${{ matrix.os }}-${{ matrix.arch }}
           path: ./wheelhouse/*.whl
@@ -170,8 +176,8 @@ jobs:
     if: ${{ !startsWith(github.ref, 'refs/pull/') }}
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: '3.10'
 
@@ -180,7 +186,7 @@ jobs:
       - name: Build sdist
         run: python -m build --sdist
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         with:
           name: Sdist
           path: dist/*.tar.gz
@@ -197,7 +203,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@b14cf4c92620c250e1c074ab0a5800e37df86765 # v4.2.0
       - name: Build a tarball for the debs
         # We need to merge all the debs uploads into one folder, then compress
         # that.
@@ -207,7 +213,7 @@ jobs:
           tar -cvJf debs.tar.xz debs
       - name: Attach to release
         # Pinned to work around https://github.com/softprops/action-gh-release/issues/445
-        uses: softprops/action-gh-release@v2.0.5
+        uses: softprops/action-gh-release@de2c0eb89ae2a093876385947365aca7b0e5f844 # v0.1.15
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
@@ -215,3 +221,7 @@ jobs:
             Sdist/*
             Wheel*/*
             debs.tar.xz
+          # if it's not already published, keep the release as a draft.
+          draft: true
+          # mark it as a prerelease if the tag contains 'rc'.
+          prerelease: ${{ contains(github.ref, 'rc') }}
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d91f9c2918..ff83d6e365 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -23,7 +23,7 @@ jobs:
       linting: ${{ !startsWith(github.ref, 'refs/pull/') || steps.filter.outputs.linting }}
       linting_readme: ${{ !startsWith(github.ref, 'refs/pull/') || steps.filter.outputs.linting_readme }}
     steps:
-    - uses: dorny/paths-filter@v3
+    - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
       id: filter
       # We only check on PRs
       if: startsWith(github.ref, 'refs/pull/')
@@ -83,14 +83,14 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
-      - uses: matrix-org/setup-python-poetry@v1
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: "3.x"
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: "all"
       - run: poetry run scripts-dev/generate_sample_config.sh --check
       - run: poetry run scripts-dev/config-lint.sh
@@ -101,8 +101,8 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
       - run: "pip install 'click==8.1.1' 'GitPython>=3.1.20'"
@@ -111,8 +111,8 @@ jobs:
   check-lockfile:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
       - run: .ci/scripts/check_lockfile.py
@@ -124,11 +124,12 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Setup Poetry
-        uses: matrix-org/setup-python-poetry@v1
+        uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
+          poetry-version: "2.1.1"
           install-project: "false"
 
       - name: Run ruff check
@@ -145,14 +146,14 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - name: Setup Poetry
-        uses: matrix-org/setup-python-poetry@v1
+        uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           # We want to make use of type hints in optional dependencies too.
           extras: all
@@ -161,11 +162,12 @@ jobs:
           # https://github.com/matrix-org/synapse/pull/15376#issuecomment-1498983775
           # To make CI green, err towards caution and install the project.
           install-project: "true"
+          poetry-version: "2.1.1"
 
       # Cribbed from
       # https://github.com/AustinScola/mypy-cache-github-action/blob/85ea4f2972abed39b33bd02c36e341b28ca59213/src/restore.ts#L10-L17
       - name: Restore/persist mypy's cache
-        uses: actions/cache@v4
+        uses: actions/cache@d4323d4df104b026a6aa633fdb11d772146be0bf # v4.2.2
         with:
           path: |
             .mypy_cache
@@ -178,7 +180,7 @@ jobs:
   lint-crlf:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Check line endings
         run: scripts-dev/check_line_terminators.sh
 
@@ -186,11 +188,11 @@ jobs:
     if: ${{ (github.base_ref == 'develop'  || contains(github.base_ref, 'release-')) && github.actor != 'dependabot[bot]' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
       - run: "pip install 'towncrier>=18.6.0rc1'"
@@ -204,15 +206,15 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
-      - uses: matrix-org/setup-python-poetry@v1
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: "all"
       - run: poetry run scripts-dev/check_pydantic_models.py
 
@@ -222,13 +224,13 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
         with:
             components: clippy
-      - uses: Swatinem/rust-cache@v2
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - run: cargo clippy -- -D warnings
 
@@ -240,14 +242,14 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@master
+        uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0 # master (rust 1.85.1)
         with:
             toolchain: nightly-2022-12-01
             components: clippy
-      - uses: Swatinem/rust-cache@v2
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - run: cargo clippy --all-features -- -D warnings
 
@@ -257,15 +259,15 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@master
+        uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0 # master (rust 1.85.1)
         with:
           # We use nightly so that it correctly groups together imports
           toolchain: nightly-2022-12-01
           components: rustfmt
-      - uses: Swatinem/rust-cache@v2
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - run: cargo fmt --check
 
@@ -276,8 +278,8 @@ jobs:
     needs: changes
     if: ${{ needs.changes.outputs.linting_readme == 'true' }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
       - run: "pip install rstcheck"
@@ -301,7 +303,7 @@ jobs:
       - lint-readme
     runs-on: ubuntu-latest
     steps:
-      - uses: matrix-org/done-action@v3
+      - uses: matrix-org/done-action@3409aa904e8a2aaf2220f09bc954d3d0b0a2ee67 # v3
         with:
           needs: ${{ toJSON(needs) }}
 
@@ -324,8 +326,8 @@ jobs:
     needs: linting-done
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: "3.x"
       - id: get-matrix
@@ -345,7 +347,7 @@ jobs:
         job:  ${{ fromJson(needs.calculate-test-jobs.outputs.trial_test_matrix) }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - run: sudo apt-get -qq install xmlsec1
       - name: Set up PostgreSQL ${{ matrix.job.postgres-version }}
         if: ${{ matrix.job.postgres-version }}
@@ -360,13 +362,13 @@ jobs:
             postgres:${{ matrix.job.postgres-version }}
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: ${{ matrix.job.python-version }}
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: ${{ matrix.job.extras }}
       - name: Await PostgreSQL
         if: ${{ matrix.job.postgres-version }}
@@ -399,11 +401,11 @@ jobs:
       - changes
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       # There aren't wheels for some of the older deps, so we need to install
       # their build dependencies
@@ -412,7 +414,7 @@ jobs:
           sudo apt-get -qq install build-essential libffi-dev python3-dev \
             libxml2-dev libxslt-dev xmlsec1 zlib1g-dev libjpeg-dev libwebp-dev
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
         with:
           python-version: '3.9'
 
@@ -462,13 +464,13 @@ jobs:
         extras: ["all"]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       # Install libs necessary for PyPy to build binary wheels for dependencies
       - run: sudo apt-get -qq install xmlsec1 libxml2-dev libxslt-dev
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: ${{ matrix.python-version }}
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: ${{ matrix.extras }}
       - run: poetry run trial --jobs=2 tests
       - name: Dump logs
@@ -512,13 +514,13 @@ jobs:
         job: ${{ fromJson(needs.calculate-test-jobs.outputs.sytest_test_matrix) }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Prepare test blacklist
         run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - name: Run SyTest
         run: /bootstrap.sh synapse
@@ -527,7 +529,7 @@ jobs:
         if: ${{ always() }}
         run: /sytest/scripts/tap_to_gha.pl /logs/results.tap
       - name: Upload SyTest logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         if: ${{ always() }}
         with:
           name: Sytest Logs - ${{ job.status }} - (${{ join(matrix.job.*, ', ') }})
@@ -557,11 +559,11 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - run: sudo apt-get -qq install xmlsec1 postgresql-client
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: "postgres"
       - run: .ci/scripts/test_export_data_command.sh
         env:
@@ -581,7 +583,7 @@ jobs:
       matrix:
         include:
           - python-version: "3.9"
-            postgres-version: "11"
+            postgres-version: "13"
 
           - python-version: "3.13"
             postgres-version: "17"
@@ -601,7 +603,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - name: Add PostgreSQL apt repository
         # We need a version of pg_dump that can handle the version of
         # PostgreSQL being tested against. The Ubuntu package repository lags
@@ -612,10 +614,10 @@ jobs:
           wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
           sudo apt-get update
       - run: sudo apt-get -qq install xmlsec1 postgresql-client
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: ${{ matrix.python-version }}
-          poetry-version: "1.3.2"
+          poetry-version: "2.1.1"
           extras: "postgres"
       - run: .ci/scripts/test_synapse_port_db.sh
         id: run_tester_script
@@ -625,7 +627,7 @@ jobs:
           PGPASSWORD: postgres
           PGDATABASE: postgres
       - name: "Upload schema differences"
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         if: ${{ failure() && !cancelled() && steps.run_tester_script.outcome == 'failure' }}
         with:
           name: Schema dumps
@@ -655,19 +657,19 @@ jobs:
             database: Postgres
 
     steps:
-      - name: Run actions/checkout@v4 for synapse
-        uses: actions/checkout@v4
+      - name: Checkout synapse codebase
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           path: synapse
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - name: Prepare Complement's Prerequisites
         run: synapse/.ci/scripts/setup_complement_prerequisites.sh
 
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5.4.0
         with:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
@@ -690,11 +692,11 @@ jobs:
       - changes
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@1.66.0
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@e05ebb0e73db581a4877c6ce762e29fe1e0b5073 # 1.66.0
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - run: cargo test
 
@@ -708,13 +710,13 @@ jobs:
       - changes
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@master
+        uses: dtolnay/rust-toolchain@56f84321dbccf38fb67ce29ab63e4754056677e0 # master (rust 1.85.1)
         with:
             toolchain: nightly-2022-12-01
-      - uses: Swatinem/rust-cache@v2
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - run: cargo bench --no-run
 
@@ -733,7 +735,7 @@ jobs:
       - linting-done
     runs-on: ubuntu-latest
     steps:
-      - uses: matrix-org/done-action@v3
+      - uses: matrix-org/done-action@3409aa904e8a2aaf2220f09bc954d3d0b0a2ee67 # v3
         with:
           needs: ${{ toJSON(needs) }}
 
diff --git a/.github/workflows/triage-incoming.yml b/.github/workflows/triage-incoming.yml
index 7a369b77fe..1d291a319b 100644
--- a/.github/workflows/triage-incoming.yml
+++ b/.github/workflows/triage-incoming.yml
@@ -6,7 +6,7 @@ on:
 
 jobs:
   triage:
-    uses: matrix-org/backend-meta/.github/workflows/triage-incoming.yml@v2
+    uses: matrix-org/backend-meta/.github/workflows/triage-incoming.yml@18beaf3c8e536108bd04d18e6c3dc40ba3931e28 # v2.0.3
     with:
       project_id: 'PVT_kwDOAIB0Bs4AFDdZ'
       content_id: ${{ github.event.issue.node_id }}
diff --git a/.github/workflows/triage_labelled.yml b/.github/workflows/triage_labelled.yml
index d1ac4357b1..c08c674c88 100644
--- a/.github/workflows/triage_labelled.yml
+++ b/.github/workflows/triage_labelled.yml
@@ -11,7 +11,7 @@ jobs:
     if: >
       contains(github.event.issue.labels.*.name, 'X-Needs-Info')
     steps:
-      - uses: actions/add-to-project@main
+      - uses: actions/add-to-project@f5473ace9aeee8b97717b281e26980aa5097023f # main (v1.0.2 + 10 commits)
         id: add_project
         with:
           project-url: "https://github.com/orgs/matrix-org/projects/67"
diff --git a/.github/workflows/twisted_trunk.yml b/.github/workflows/twisted_trunk.yml
index cdaa00ef90..aac1e350a2 100644
--- a/.github/workflows/twisted_trunk.yml
+++ b/.github/workflows/twisted_trunk.yml
@@ -40,16 +40,17 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable (rust 1.85.1)
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: "3.x"
           extras: "all"
+          poetry-version: "2.1.1"
       - run: |
           poetry remove twisted
           poetry add --extras tls git+https://github.com/twisted/twisted.git#${{ inputs.twisted_ref || 'trunk' }}
@@ -64,17 +65,18 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - run: sudo apt-get -qq install xmlsec1
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable (rust 1.85.1)
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
-      - uses: matrix-org/setup-python-poetry@v1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: "3.x"
           extras: "all test"
+          poetry-version: "2.1.1"
       - run: |
           poetry remove twisted
           poetry add --extras tls git+https://github.com/twisted/twisted.git#trunk
@@ -108,11 +110,11 @@ jobs:
         - ${{ github.workspace }}:/src
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@stable
-      - uses: Swatinem/rust-cache@v2
+        uses: dtolnay/rust-toolchain@fcf085fcb4b4b8f63f96906cd713eb52181b5ea4 # stable (rust 1.85.1)
+      - uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
 
       - name: Patch dependencies
         # Note: The poetry commands want to create a virtualenv in /src/.venv/,
@@ -136,7 +138,7 @@ jobs:
         if: ${{ always() }}
         run: /sytest/scripts/tap_to_gha.pl /logs/results.tap
       - name: Upload SyTest logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@4cec3d8aa04e39d1a68397de0c4cd6fb9dce8ec1 # v4.6.1
         if: ${{ always() }}
         with:
           name: Sytest Logs - ${{ job.status }} - (${{ join(matrix.*, ', ') }})
@@ -164,14 +166,14 @@ jobs:
 
     steps:
       - name: Run actions/checkout@v4 for synapse
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           path: synapse
 
       - name: Prepare Complement's Prerequisites
         run: synapse/.ci/scripts/setup_complement_prerequisites.sh
 
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@0aaccfd150d50ccaeb58ebd88d36e91967a5f35b # v5.4.0
         with:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
@@ -181,11 +183,11 @@ jobs:
         run: |
           set -x
           DEBIAN_FRONTEND=noninteractive sudo apt-get install -yqq python3 pipx
-          pipx install poetry==1.3.2
+          pipx install poetry==2.1.1
 
           poetry remove -n twisted
           poetry add -n --extras tls git+https://github.com/twisted/twisted.git#trunk
-          poetry lock --no-update
+          poetry lock
         working-directory: synapse
 
       - run: |
@@ -206,7 +208,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/CHANGES.md b/CHANGES.md
index 535c41f6a6..3053724c9d 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3730 +1,317 @@
-# Synapse 1.120.2 (2024-12-03)
-
-This version has building of wheels for macOS disabled.
-It is functionally identical to 1.120.1, which contains multiple security fixes.
-If you are already using 1.120.1, there is no need to upgrade to this version.
-
-
-
-# Synapse 1.120.1 (2024-12-03)
-
-This patch release fixes multiple security vulnerabilities, some affecting all prior versions of Synapse. Server administrators are encouraged to update Synapse as soon as possible. We are not aware of these vulnerabilities being exploited in the wild.
-
-Administrators who are unable to update Synapse may use the workarounds described in the linked GitHub Security Advisory below.
-
-### Security advisory
-
-The following issues are fixed in 1.120.1.
-
-- [GHSA-rfq8-j7rh-8hf2](https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2) / [CVE-2024-52805](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-52805): **Unsupported content types can lead to memory exhaustion**
-
-  Synapse instances which have a high `max_upload_size` and which don't have a reverse proxy in front of them that would otherwise limit upload size are affected.
-
-  Fixed by [4b7154c58501b4bf5e1c2d6c11ebef96529f2fdf](https://github.com/element-hq/synapse/commit/4b7154c58501b4bf5e1c2d6c11ebef96529f2fdf).
-
-- [GHSA-f3r3-h2mq-hx2h](https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h) / [CVE-2024-52815](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-52815): **Malicious invites via federation can break a user's sync**
-
-  Fixed by [d82e1ed357b7ee21dff83d06cba7a67840cfd464](https://github.com/element-hq/synapse/commit/d82e1ed357b7ee21dff83d06cba7a67840cfd464).
-
-- [GHSA-vp6v-whfm-rv3g](https://github.com/element-hq/synapse/security/advisories/GHSA-vp6v-whfm-rv3g) / [CVE-2024-53863](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53863): **Synapse can be forced to thumbnail unexpected file formats, invoking potentially untrustworthy decoders**
-
-  Synapse instances can disable dynamic thumbnailing by setting `dynamic_thumbnails` to `false` in the configuration file.
-
-  Fixed by [b64a4e5fbbbf119b6c65aedf0d999b4237d55503](https://github.com/element-hq/synapse/commit/b64a4e5fbbbf119b6c65aedf0d999b4237d55503).
-
-- [GHSA-56w4-5538-8v8h](https://github.com/element-hq/synapse/security/advisories/GHSA-56w4-5538-8v8h) / [CVE-2024-53867](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53867): **The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room**
-
-  Non-state events, like messages, are unaffected.
-
-  Synapse instances can disable the Sliding Sync feature by setting `experimental_features.msc3575_enabled` to `false` in the configuration file.
-
-  Fixed by [4daa533e82f345ce87b9495d31781af570ba3ead](https://github.com/element-hq/synapse/commit/4daa533e82f345ce87b9495d31781af570ba3ead).
-
-See the advisories for more details. If you have any questions, email [security at element.io](mailto:security@element.io).
-
-### Bugfixes
-
-- Fix release process to not create duplicate releases. ([\#17970](https://github.com/element-hq/synapse/issues/17970))
-
-
-
-# Synapse 1.120.0 (2024-11-26)
-
-### Bugfixes
-
-- Fix a bug introduced in Synapse v1.120rc1 which would cause the newly-introduced `delete_old_otks` job to fail in worker-mode deployments. ([\#17960](https://github.com/element-hq/synapse/issues/17960))
-
-
-
-
-# Synapse 1.120.0rc1 (2024-11-20)
-
-This release enables the enforcement of authenticated media by default, with exemptions for media that is already present in the
-homeserver's media store.
-
-Most homeservers operating in the public federation will not be impacted by this change, given that
-the large homeserver `matrix.org` enabled this in September 2024 and therefore most clients and servers
-will already have updated as a result.
-
-Some server administrators may still wish to disable this enforcement for the time being, in the interest of compatibility with older clients
-and older federated homeservers.
-See the [upgrade notes](https://element-hq.github.io/synapse/v1.120/upgrade.html#authenticated-media-is-now-enforced-by-default) for more information.
+# Synapse 1.127.0rc1 (2025-03-18)
 
 ### Features
 
-- Enforce authenticated media by default. Administrators can revert this by configuring `enable_authenticated_media` to `false`. In a future release of Synapse, this option will be removed and become always-on. ([\#17889](https://github.com/element-hq/synapse/issues/17889))
-- Add a one-off task to delete old One-Time Keys, to guard against us having old OTKs in the database that the client has long forgotten about. ([\#17934](https://github.com/element-hq/synapse/issues/17934))
+- Update [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140) implementation to no longer cancel a user's own delayed state events with an event type & state key that match a more recent state event sent by that user. ([\#17810](https://github.com/element-hq/synapse/issues/17810))
 
 ### Improved Documentation
 
-- Clarify the semantics of the `enable_authenticated_media` configuration option. ([\#17913](https://github.com/element-hq/synapse/issues/17913))
-- Add documentation about backing up Synapse. ([\#17931](https://github.com/element-hq/synapse/issues/17931))
-
-### Deprecations and Removals
-
-- Remove support for [MSC3886: Simple client rendezvous capability](https://github.com/matrix-org/matrix-spec-proposals/pull/3886), which has been superseded by [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/pull/4108) and therefore closed. ([\#17638](https://github.com/element-hq/synapse/issues/17638))
+- Fixed a minor typo in the Synapse documentation. Contributed by @karuto12. ([\#18224](https://github.com/element-hq/synapse/issues/18224))
 
 ### Internal Changes
 
-- Addressed some typos in docs and returned error message for unknown MXC ID. ([\#17865](https://github.com/element-hq/synapse/issues/17865))
-- Unpin the upload release GHA action. ([\#17923](https://github.com/element-hq/synapse/issues/17923))
-- Bump macOS version used to build wheels during release, as current version used is end-of-life. ([\#17924](https://github.com/element-hq/synapse/issues/17924))
-- Move server event filtering logic to Rust. ([\#17928](https://github.com/element-hq/synapse/issues/17928))
-- Support new package name of PyPI package `python-multipart` 0.0.13 so that distro packagers do not need to work around name conflict with PyPI package `multipart`. ([\#17932](https://github.com/element-hq/synapse/issues/17932))
-- Speed up slow initial sliding syncs on large servers. ([\#17946](https://github.com/element-hq/synapse/issues/17946))
-
-### Updates to locked dependencies
-
-* Bump anyhow from 1.0.92 to 1.0.93. ([\#17920](https://github.com/element-hq/synapse/issues/17920))
-* Bump bleach from 6.1.0 to 6.2.0. ([\#17918](https://github.com/element-hq/synapse/issues/17918))
-* Bump immutabledict from 4.2.0 to 4.2.1. ([\#17941](https://github.com/element-hq/synapse/issues/17941))
-* Bump packaging from 24.1 to 24.2. ([\#17940](https://github.com/element-hq/synapse/issues/17940))
-* Bump phonenumbers from 8.13.49 to 8.13.50. ([\#17942](https://github.com/element-hq/synapse/issues/17942))
-* Bump pygithub from 2.4.0 to 2.5.0. ([\#17917](https://github.com/element-hq/synapse/issues/17917))
-* Bump ruff from 0.7.2 to 0.7.3. ([\#17919](https://github.com/element-hq/synapse/issues/17919))
-* Bump serde from 1.0.214 to 1.0.215. ([\#17938](https://github.com/element-hq/synapse/issues/17938))
-
-# Synapse 1.119.0 (2024-11-13)
-
-No significant changes since 1.119.0rc2.
-
-### Python 3.8 support dropped
-
-Python 3.8 is [end-of-life](https://devguide.python.org/versions/) and is no longer supported by Synapse. The minimum supported Python version is now 3.9.
-
-If you are running Synapse with Python 3.8, please upgrade to Python 3.9 (or greater) before upgrading Synapse.
-
-
-# Synapse 1.119.0rc2 (2024-11-11)
-
-Note that due to packaging issues there was no v1.119.0rc1.
-
-
-### Features
-
-- Support [MSC4151](https://github.com/matrix-org/matrix-spec-proposals/pull/4151)'s stable report room API. ([\#17374](https://github.com/element-hq/synapse/issues/17374))
-- Add experimental support for [MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222) (Adding `state_after` to sync v2). ([\#17888](https://github.com/element-hq/synapse/issues/17888))
-
-### Bugfixes
-
-- Fix bug with sliding sync where `$LAZY`-loading room members would not return `required_state` membership in incremental syncs. ([\#17809](https://github.com/element-hq/synapse/issues/17809))
-- Check if user has membership in a room before tagging it. Contributed by Lama Alosaimi. ([\#17839](https://github.com/element-hq/synapse/issues/17839))
-- Fix a bug in the admin redact endpoint where the background task would not run if a worker was specified in
-  the config option `run_background_tasks_on`. ([\#17847](https://github.com/element-hq/synapse/issues/17847))
-- Fix bug where some presence and typing timeouts can expire early. ([\#17850](https://github.com/element-hq/synapse/issues/17850))
-- Fix detection when the built Rust library was outdated when using source installations. ([\#17861](https://github.com/element-hq/synapse/issues/17861))
-- Fix a long-standing bug in Synapse which could cause one-time keys to be issued in the incorrect order, causing message decryption failures. ([\#17903](https://github.com/element-hq/synapse/pull/17903))
-- Fix experimental support for [MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222) (Adding `state_after` to sync v2) where we would return the full state on incremental syncs when using lazy loaded members and there were no new events in the timeline. ([\#17915](https://github.com/element-hq/synapse/pull/17915))
-
-### Internal Changes
-
-- Remove support for python 3.8. ([\#17908](https://github.com/element-hq/synapse/issues/17908))
-- Add a test for downloading and thumbnailing a CMYK JPEG. ([\#17786](https://github.com/element-hq/synapse/issues/17786))
-- Refactor database calls to remove `Generator` usage. ([\#17813](https://github.com/element-hq/synapse/issues/17813), [\#17814](https://github.com/element-hq/synapse/issues/17814), [\#17815](https://github.com/element-hq/synapse/issues/17815), [\#17816](https://github.com/element-hq/synapse/issues/17816), [\#17817](https://github.com/element-hq/synapse/issues/17817), [\#17818](https://github.com/element-hq/synapse/issues/17818), [\#17890](https://github.com/element-hq/synapse/issues/17890))
-- Include the destination in the error of 'Destination mismatch' on federation requests. ([\#17830](https://github.com/element-hq/synapse/issues/17830))
-- The nix flake inside the repository no longer tracks nixpkgs/master to not catch the latest bugs from a PR merged 5 minutes ago. ([\#17852](https://github.com/element-hq/synapse/issues/17852))
-- Minor speed-up of sliding sync by computing extensions results in parallel. ([\#17884](https://github.com/element-hq/synapse/issues/17884))
-- Bump the default Python version in the Synapse Dockerfile from 3.11 -> 3.12. ([\#17887](https://github.com/element-hq/synapse/issues/17887))
-- Remove usage of internal header encoding API. ([\#17894](https://github.com/element-hq/synapse/issues/17894))
-- Use unique name for each os.arch variant when uploading Wheel artifacts. ([\#17905](https://github.com/element-hq/synapse/issues/17905))
-- Fix tests to run with latest Twisted. ([\#17906](https://github.com/element-hq/synapse/pull/17906), [\#17907](https://github.com/element-hq/synapse/pull/17907), [\#17911](https://github.com/element-hq/synapse/pull/17911))
-- Update version constraint to allow the latest poetry-core 1.9.1. ([\#17902](https://github.com/element-hq/synapse/pull/17902))
-- Update the portdb CI to use Python 3.13 and Postgres 17 as latest dependencies. ([\#17909](https://github.com/element-hq/synapse/pull/17909))
-- Add an index to `current_state_delta_stream` table. ([\#17912](https://github.com/element-hq/synapse/issues/17912))
-- Fix building and attaching release artifacts during the release process. ([\#17921](https://github.com/element-hq/synapse/issues/17921))
-
-### Updates to locked dependencies
-
-* Bump actions/download-artifact & actions/upload-artifact from 3 to 4 in /.github/workflows. ([\#17657](https://github.com/element-hq/synapse/issues/17657))
-* Bump anyhow from 1.0.89 to 1.0.92. ([\#17858](https://github.com/element-hq/synapse/issues/17858), [\#17876](https://github.com/element-hq/synapse/issues/17876), [\#17901](https://github.com/element-hq/synapse/issues/17901))
-* Bump bytes from 1.7.2 to 1.8.0. ([\#17877](https://github.com/element-hq/synapse/issues/17877))
-* Bump cryptography from 43.0.1 to 43.0.3. ([\#17853](https://github.com/element-hq/synapse/issues/17853))
-* Bump mypy-zope from 1.0.7 to 1.0.8. ([\#17898](https://github.com/element-hq/synapse/issues/17898))
-* Bump phonenumbers from 8.13.47 to 8.13.49. ([\#17880](https://github.com/element-hq/synapse/issues/17880), [\#17899](https://github.com/element-hq/synapse/issues/17899))
-* Bump python-multipart from 0.0.12 to 0.0.16. ([\#17879](https://github.com/element-hq/synapse/issues/17879))
-* Bump regex from 1.11.0 to 1.11.1. ([\#17874](https://github.com/element-hq/synapse/issues/17874))
-* Bump ruff from 0.6.9 to 0.7.2. ([\#17868](https://github.com/element-hq/synapse/issues/17868), [\#17897](https://github.com/element-hq/synapse/issues/17897))
-* Bump serde from 1.0.210 to 1.0.214. ([\#17875](https://github.com/element-hq/synapse/issues/17875), [\#17900](https://github.com/element-hq/synapse/issues/17900))
-* Bump serde_json from 1.0.128 to 1.0.132. ([\#17857](https://github.com/element-hq/synapse/issues/17857))
-* Bump types-psycopg2 from 2.9.21.20240819 to 2.9.21.20241019. ([\#17855](https://github.com/element-hq/synapse/issues/17855))
-* Bump types-setuptools from 75.1.0.20241014 to 75.2.0.20241019. ([\#17856](https://github.com/element-hq/synapse/issues/17856))
-
-# Synapse 1.118.0 (2024-10-29)
-
-No significant changes since 1.118.0rc1.
-
-### Python 3.8 support will be dropped in the next release
-
-Python 3.8 is now [end-of-life](https://devguide.python.org/versions/). As per our [Deprecation Policy for Platform Dependencies](https://element-hq.github.io/synapse/latest/deprecation_policy.html#policy), Synapse will be dropping support for Python 3.8 in the next release; Synapse 1.119.0.
-
-Synapse 1.118.x will be the final release to support Python 3.8. If you are running Synapse with Python 3.8, please upgrade before the 1.119.0 release, due in less than one month.
-
-### Python 3.13 and PostgreSQL 17 support
-
-On the other end of the spectrum, Synapse 1.118.0 is the first release to support [Python 3.13](https://www.python.org/downloads/release/python-3130/)! [PostgreSQL 17](https://www.postgresql.org/about/news/postgresql-17-released-2936/) is also supported as of this release.
-
-
-# Synapse 1.118.0rc1 (2024-10-22)
-
-### Features
-
-- Added the `display_name_claim` option to the JWT configuration. This option allows specifying the claim key that contains the user's display name in the JWT payload. ([\#17708](https://github.com/element-hq/synapse/issues/17708))
-- Implement [MSC4210](https://github.com/matrix-org/matrix-spec-proposals/pull/4210): Remove legacy mentions. Contributed by @tulir @ Beeper. ([\#17783](https://github.com/element-hq/synapse/issues/17783))
-
-### Bugfixes
-
-- Fix saving of PNG thumbnails, when the original image is in the CMYK color space. ([\#17736](https://github.com/element-hq/synapse/issues/17736))
-- Fix bug with sliding sync where the server would not return state that was added to the `required_state` config. ([\#17785](https://github.com/element-hq/synapse/issues/17785), [\#17805](https://github.com/element-hq/synapse/issues/17805))
-- Fix a bug in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync that would cause rooms to stay forgotten and hidden even after rejoining. ([\#17835](https://github.com/element-hq/synapse/issues/17835))
-
-### Improved Documentation
-
-- Clarify when the `user_may_invite` and `user_may_send_3pid_invite` module callbacks are called. ([\#17627](https://github.com/element-hq/synapse/issues/17627))
-- Correct documentation to refer to the `--config-path` argument instead of `--config-file`. ([\#17802](https://github.com/element-hq/synapse/issues/17802))
-- Fix typo in `target_cache_memory_usage` docs. ([\#17825](https://github.com/element-hq/synapse/issues/17825))
-
-### Internal Changes
-
-- Slight optimization when fetching state/events for Sliding Sync. ([\#17718](https://github.com/element-hq/synapse/issues/17718))
-- Add Python 3.13 and Postgres 17 to the test matrix. ([\#17752](https://github.com/element-hq/synapse/issues/17752))
-- Test github token before running release script steps. ([\#17803](https://github.com/element-hq/synapse/issues/17803))
-- Build debian packages for new Ubuntu versions, and stop building for no longer supported versions. ([\#17824](https://github.com/element-hq/synapse/issues/17824))
-- Enable the `.org.matrix.msc4028.encrypted_event` push rule by default in accordance with [MSC4028](https://github.com/matrix-org/matrix-spec-proposals/pull/4028). Note that the corresponding experimental feature must still be switched on for this push rule to have any effect. ([\#17826](https://github.com/element-hq/synapse/issues/17826))
-- Fix some typing issues uncovered by upgrading mypy to 1.11.x. ([\#17842](https://github.com/element-hq/synapse/issues/17842))
+- Remove undocumented `SYNAPSE_USE_FROZEN_DICTS` environment variable. ([\#18123](https://github.com/element-hq/synapse/issues/18123))
+- Fix detection of workflow failures in the release script. ([\#18211](https://github.com/element-hq/synapse/issues/18211))
+- Add caching support to media endpoints. ([\#18235](https://github.com/element-hq/synapse/issues/18235))
 
 
 
 ### Updates to locked dependencies
 
-* Bump mypy from 1.10.1 to 1.11.2. ([\#17842](https://github.com/element-hq/synapse/issues/17842))
-* Bump mypy-zope from 1.0.5 to 1.0.7. ([\#17827](https://github.com/element-hq/synapse/issues/17827))
-* Bump phonenumbers from 8.13.46 to 8.13.47. ([\#17797](https://github.com/element-hq/synapse/issues/17797))
-* Bump psycopg2 from 2.9.9 to 2.9.10. ([\#17843](https://github.com/element-hq/synapse/issues/17843))
-* Bump ruff from 0.6.8 to 0.6.9. ([\#17794](https://github.com/element-hq/synapse/issues/17794))
-* Bump sentry-sdk from 2.14.0 to 2.15.0. ([\#17795](https://github.com/element-hq/synapse/issues/17795))
-* Bump sentry-sdk from 2.15.0 to 2.16.0. ([\#17829](https://github.com/element-hq/synapse/issues/17829))
-* Bump sentry-sdk from 2.16.0 to 2.17.0. ([\#17844](https://github.com/element-hq/synapse/issues/17844))
-* Bump sigstore/cosign-installer from 3.6.0 to 3.7.0. ([\#17798](https://github.com/element-hq/synapse/issues/17798))
-* Bump tomli from 2.0.1 to 2.0.2. ([\#17796](https://github.com/element-hq/synapse/issues/17796))
-* Bump types-requests from 2.32.0.20240914 to 2.32.0.20241016. ([\#17841](https://github.com/element-hq/synapse/issues/17841))
-* Bump types-setuptools from 75.1.0.20240917 to 75.1.0.20241014. ([\#17828](https://github.com/element-hq/synapse/issues/17828))
+* Bump anyhow from 1.0.96 to 1.0.97. ([\#18201](https://github.com/element-hq/synapse/issues/18201))
+* Bump bcrypt from 4.2.1 to 4.3.0. ([\#18207](https://github.com/element-hq/synapse/issues/18207))
+* Bump bytes from 1.10.0 to 1.10.1. ([\#18227](https://github.com/element-hq/synapse/issues/18227))
+* Bump http from 1.2.0 to 1.3.1. ([\#18245](https://github.com/element-hq/synapse/issues/18245))
+* Bump sentry-sdk from 2.19.2 to 2.22.0. ([\#18205](https://github.com/element-hq/synapse/issues/18205))
+* Bump serde from 1.0.218 to 1.0.219. ([\#18228](https://github.com/element-hq/synapse/issues/18228))
+* Bump serde_json from 1.0.139 to 1.0.140. ([\#18202](https://github.com/element-hq/synapse/issues/18202))
+* Bump ulid from 1.2.0 to 1.2.1. ([\#18246](https://github.com/element-hq/synapse/issues/18246))
 
-# Synapse 1.117.0 (2024-10-15)
+# Synapse 1.126.0 (2025-03-11)
+Administrators using the Debian/Ubuntu packages from `packages.matrix.org`, please check
+[the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/release-v1.126/docs/upgrade.md#change-of-signing-key-expiry-date-for-the-debianubuntu-package-repository)
+as we have recently updated the expiry date on the repository's GPG signing key. The old version of the key will expire on `2025-03-15`.
 
-No significant changes since 1.117.0rc1.
+No significant changes since 1.126.0rc3.
 
 
 
 
-# Synapse 1.117.0rc1 (2024-10-08)
+# Synapse 1.126.0rc3 (2025-03-07)
+
+### Bugfixes
+
+- Revert the background job to clear unreferenced state groups (that was introduced in v1.126.0rc1), due to [a suspected issue](https://github.com/element-hq/synapse/issues/18217) that causes increased disk usage. ([\#18222](https://github.com/element-hq/synapse/issues/18222))
+
+
+
+
+# Synapse 1.126.0rc2 (2025-03-05)
+
+
+### Internal Changes
+
+- Fix wheel building configuration in CI by installing libatomic1. ([\#18212](https://github.com/element-hq/synapse/issues/18212), [\#18213](https://github.com/element-hq/synapse/issues/18213))
+
+# Synapse 1.126.0rc1 (2025-03-04)
+
+Synapse 1.126.0rc1 was not fully released due to an error in CI.
 
 ### Features
 
-- Add config option `redis.password_path`. ([\#17717](https://github.com/element-hq/synapse/issues/17717))
+- Define ratelimit configuration for delayed event management. ([\#18019](https://github.com/element-hq/synapse/issues/18019))
+- Add `form_secret_path` config option. ([\#18090](https://github.com/element-hq/synapse/issues/18090))
+- Add the `--no-secrets-in-config` command line option. ([\#18092](https://github.com/element-hq/synapse/issues/18092))
+- Add background job to clear unreferenced state groups. ([\#18154](https://github.com/element-hq/synapse/issues/18154))
+- Add support for specifying/overriding `id_token_signing_alg_values_supported` for an OpenID identity provider. ([\#18177](https://github.com/element-hq/synapse/issues/18177))
+- Add `worker_replication_secret_path` config option. ([\#18191](https://github.com/element-hq/synapse/issues/18191))
+- Add support for specifying/overriding `redirect_uri` in the authorization and token requests against an OpenID identity provider. ([\#18197](https://github.com/element-hq/synapse/issues/18197))
 
 ### Bugfixes
 
-- Fix a rare bug introduced in v1.29.0 where invalidating a user's access token from a worker could raise an error. ([\#17779](https://github.com/element-hq/synapse/issues/17779))
-- In the response to `GET /_matrix/client/versions`, set the `unstable_features` flag for [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140) to `false` when server configuration disables support for delayed events. ([\#17780](https://github.com/element-hq/synapse/issues/17780))
-- Improve input validation and room membership checks in admin redaction API. ([\#17792](https://github.com/element-hq/synapse/issues/17792))
-
-### Improved Documentation
-
-- Clarify the docstring of `test_forget_when_not_left`. ([\#17628](https://github.com/element-hq/synapse/issues/17628))
-- Add documentation note about PYTHONMALLOC for accurate jemalloc memory tracking. Contributed by @hensg. ([\#17709](https://github.com/element-hq/synapse/issues/17709))
-- Remove spurious "TODO UPDATE ALL THIS" note in the Debian installation docs. ([\#17749](https://github.com/element-hq/synapse/issues/17749))
-- Explain how load balancing works for `federation_sender_instances`. ([\#17776](https://github.com/element-hq/synapse/issues/17776))
-
-### Internal Changes
-
-- Minor performance increase for large accounts using sliding sync. ([\#17751](https://github.com/element-hq/synapse/issues/17751))
-- Increase performance of the notifier when there are many syncing users. ([\#17765](https://github.com/element-hq/synapse/issues/17765), [\#17766](https://github.com/element-hq/synapse/issues/17766))
-- Fix performance of streams that don't change often. ([\#17767](https://github.com/element-hq/synapse/issues/17767))
-- Improve performance of sliding sync connections that do not ask for any rooms. ([\#17768](https://github.com/element-hq/synapse/issues/17768))
-- Reduce overhead of sliding sync E2EE loops. ([\#17771](https://github.com/element-hq/synapse/issues/17771))
-- Sliding sync minor performance speed up using new table. ([\#17787](https://github.com/element-hq/synapse/issues/17787))
-- Sliding sync minor performance improvement by omitting unchanged data from incremental responses. ([\#17788](https://github.com/element-hq/synapse/issues/17788))
-- Speed up sliding sync when there are many active subscriptions. ([\#17789](https://github.com/element-hq/synapse/issues/17789))
-- Add missing license headers on new source files. ([\#17799](https://github.com/element-hq/synapse/issues/17799))
-
-
-
-### Updates to locked dependencies
-
-* Bump phonenumbers from 8.13.45 to 8.13.46. ([\#17773](https://github.com/element-hq/synapse/issues/17773))
-* Bump python-multipart from 0.0.10 to 0.0.12. ([\#17772](https://github.com/element-hq/synapse/issues/17772))
-* Bump regex from 1.10.6 to 1.11.0. ([\#17770](https://github.com/element-hq/synapse/issues/17770))
-* Bump ruff from 0.6.7 to 0.6.8. ([\#17774](https://github.com/element-hq/synapse/issues/17774))
-
-# Synapse 1.116.0 (2024-10-01)
-
-No significant changes since 1.116.0rc2.
-
-
-
-
-# Synapse 1.116.0rc2 (2024-09-26)
-
-### Features
-
-- Add implementation of restricting who can overwrite a state event as proposed by [MSC3757](https://github.com/matrix-org/matrix-spec-proposals/pull/3757). ([\#17513](https://github.com/element-hq/synapse/issues/17513))
-
-
-
-
-# Synapse 1.116.0rc1 (2024-09-25)
-
-### Features
-
-- Add initial implementation of delayed events as proposed by [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140). ([\#17326](https://github.com/element-hq/synapse/issues/17326))
-- Add an asynchronous Admin API endpoint [to redact all a user's events](https://element-hq.github.io/synapse/v1.116/admin_api/user_admin_api.html#redact-all-the-events-of-a-user),
-  and [an endpoint to check on the status of that redaction task](https://element-hq.github.io/synapse/v1.116/admin_api/user_admin_api.html#check-the-status-of-a-redaction-process). ([\#17506](https://github.com/element-hq/synapse/issues/17506))
-- Add support for the `tags` and `not_tags` filters for [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17662](https://github.com/element-hq/synapse/issues/17662))
-- Guests can use the new media endpoints to download media, as described by [MSC4189](https://github.com/matrix-org/matrix-spec-proposals/pull/4189). ([\#17675](https://github.com/element-hq/synapse/issues/17675))
-- Add config option `turn_shared_secret_path`. ([\#17690](https://github.com/element-hq/synapse/issues/17690))
-- Return room tags in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync account data extension. ([\#17707](https://github.com/element-hq/synapse/issues/17707))
-
-### Bugfixes
-
-- Make sure we get up-to-date state information when using the new [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync tables to derive room membership. ([\#17692](https://github.com/element-hq/synapse/issues/17692))
-- Fix bug where room account data would not correctly be sent down [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync for old rooms. ([\#17695](https://github.com/element-hq/synapse/issues/17695))
-- Fix a bug in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync which could prevent /sync from working for certain user accounts. ([\#17727](https://github.com/element-hq/synapse/issues/17727), [\#17733](https://github.com/element-hq/synapse/issues/17733))
-- Ignore invites from ignored users in Sliding Sync. ([\#17729](https://github.com/element-hq/synapse/issues/17729))
-- Fix bug in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync where the server would incorrectly return a negative bump stamp, which caused Element X apps to stop syncing. ([\#17748](https://github.com/element-hq/synapse/issues/17748))
-
-### Internal Changes
-
-- Import pydantic objects from the `_pydantic_compat` module.
-  This allows `check_pydantic_models.py` to mock those pydantic objects
-  only in the synapse module, and not interfere with pydantic objects in
-  external dependencies. ([\#17667](https://github.com/element-hq/synapse/issues/17667))
-- Use [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync tables as a bulk shortcut for getting the max `event_stream_ordering` of rooms. ([\#17693](https://github.com/element-hq/synapse/issues/17693))
-- Speed up [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) sliding sync requests a bit where there are many room changes. ([\#17696](https://github.com/element-hq/synapse/issues/17696))
-- Refactor [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) sliding sync filter unit tests so the sliding sync API has better test coverage. ([\#17703](https://github.com/element-hq/synapse/issues/17703))
-- Fetch `bump_stamp`s more efficiently in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17723](https://github.com/element-hq/synapse/issues/17723))
-- Shortcut for checking if certain background updates have completed (utilized in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync). ([\#17724](https://github.com/element-hq/synapse/issues/17724))
-- More efficiently fetch rooms for [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17725](https://github.com/element-hq/synapse/issues/17725))
-- Fix `_bulk_get_max_event_pos` being inefficient. ([\#17728](https://github.com/element-hq/synapse/issues/17728))
-- Add cache to `get_tags_for_room(...)`. ([\#17730](https://github.com/element-hq/synapse/issues/17730))
-- Small performance improvement in speeding up [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17731](https://github.com/element-hq/synapse/issues/17731))
-- Minor speed up of initial [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) sliding sync requests. ([\#17734](https://github.com/element-hq/synapse/issues/17734))
-- Remove usage of the deprecated `cgi` module, deprecated in Python 3.11 and removed in Python 3.13. ([\#17741](https://github.com/element-hq/synapse/issues/17741))
-- Fix typing of a variable that is not `Unknown` anymore after updating `treq`. ([\#17744](https://github.com/element-hq/synapse/issues/17744))
-
-
-
-### Updates to locked dependencies
-
-* Bump anyhow from 1.0.86 to 1.0.89. ([\#17685](https://github.com/element-hq/synapse/issues/17685), [\#17716](https://github.com/element-hq/synapse/issues/17716))
-* Bump bytes from 1.7.1 to 1.7.2. ([\#17743](https://github.com/element-hq/synapse/issues/17743))
-* Bump cryptography from 43.0.0 to 43.0.1. ([\#17689](https://github.com/element-hq/synapse/issues/17689))
-* Bump idna from 3.8 to 3.10. ([\#17758](https://github.com/element-hq/synapse/issues/17758))
-* Bump msgpack from 1.0.8 to 1.1.0. ([\#17759](https://github.com/element-hq/synapse/issues/17759))
-* Bump phonenumbers from 8.13.44 to 8.13.45. ([\#17762](https://github.com/element-hq/synapse/issues/17762))
-* Bump prometheus-client from 0.20.0 to 0.21.0. ([\#17746](https://github.com/element-hq/synapse/issues/17746))
-* Bump pyasn1 from 0.6.0 to 0.6.1. ([\#17714](https://github.com/element-hq/synapse/issues/17714))
-* Bump pyasn1-modules from 0.4.0 to 0.4.1. ([\#17747](https://github.com/element-hq/synapse/issues/17747))
-* Bump pydantic from 2.8.2 to 2.9.2. ([\#17756](https://github.com/element-hq/synapse/issues/17756))
-* Bump python-multipart from 0.0.9 to 0.0.10. ([\#17745](https://github.com/element-hq/synapse/issues/17745))
-* Bump ruff from 0.6.4 to 0.6.7. ([\#17715](https://github.com/element-hq/synapse/issues/17715), [\#17760](https://github.com/element-hq/synapse/issues/17760))
-* Bump sentry-sdk from 2.13.0 to 2.14.0. ([\#17712](https://github.com/element-hq/synapse/issues/17712))
-* Bump serde from 1.0.209 to 1.0.210. ([\#17686](https://github.com/element-hq/synapse/issues/17686))
-* Bump serde_json from 1.0.127 to 1.0.128. ([\#17687](https://github.com/element-hq/synapse/issues/17687))
-* Bump treq from 23.11.0 to 24.9.1. ([\#17744](https://github.com/element-hq/synapse/issues/17744))
-* Bump types-pyyaml from 6.0.12.20240808 to 6.0.12.20240917. ([\#17755](https://github.com/element-hq/synapse/issues/17755))
-* Bump types-requests from 2.32.0.20240712 to 2.32.0.20240914. ([\#17713](https://github.com/element-hq/synapse/issues/17713))
-* Bump types-setuptools from 74.1.0.20240907 to 75.1.0.20240917. ([\#17757](https://github.com/element-hq/synapse/issues/17757))
-
-# Synapse 1.115.0 (2024-09-17)
-
-No significant changes since 1.115.0rc2.
-
-
-
-
-# Synapse 1.115.0rc2 (2024-09-12)
-
-### Internal Changes
-
-- Pre-populate room data used in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint for quick filtering/sorting. ([\#17652](https://github.com/element-hq/synapse/issues/17652))
-- Speed up sliding sync by reducing amount of data pulled out of the database for large rooms. ([\#17683](https://github.com/element-hq/synapse/issues/17683))
-
-
-
-
-# Synapse 1.115.0rc1 (2024-09-10)
-
-### Features
-
-- Improve cross-signing upload when using [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) to use a custom UIA flow stage, with web fallback support. ([\#17509](https://github.com/element-hq/synapse/issues/17509))
-
-### Bugfixes
-
-- Return `400 M_BAD_JSON` upon attempting to complete various room actions with a non-local user ID and unknown room ID, rather than an internal server error. ([\#17607](https://github.com/element-hq/synapse/issues/17607))
-- Fix authenticated media responses using a wrong limit when following redirects over federation. ([\#17626](https://github.com/element-hq/synapse/issues/17626))
-- Fix bug where we returned the wrong `bump_stamp` for invites in sliding sync response, causing incorrect ordering of invites in the room list. ([\#17674](https://github.com/element-hq/synapse/issues/17674))
-
-### Improved Documentation
-
-- Clarify that the admin api resource is only loaded on the main process and not workers. ([\#17590](https://github.com/element-hq/synapse/issues/17590))
-- Fixed typo in `saml2_config` config [example](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#saml2_config). ([\#17594](https://github.com/element-hq/synapse/issues/17594))
-
-### Deprecations and Removals
-
-- Stabilise [MSC4156](https://github.com/matrix-org/matrix-spec-proposals/pull/4156) by removing the `msc4156_enabled` config setting and defaulting it to `true`. ([\#17650](https://github.com/element-hq/synapse/issues/17650))
-
-### Internal Changes
-
-- Update [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) implementation: load the issuer and account management URLs from OIDC discovery. ([\#17407](https://github.com/element-hq/synapse/issues/17407))
-- Pre-populate room data used in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint for quick filtering/sorting. ([\#17512](https://github.com/element-hq/synapse/issues/17512), [\#17632](https://github.com/element-hq/synapse/issues/17632), [\#17633](https://github.com/element-hq/synapse/issues/17633), [\#17634](https://github.com/element-hq/synapse/issues/17634), [\#17635](https://github.com/element-hq/synapse/issues/17635), [\#17636](https://github.com/element-hq/synapse/issues/17636), [\#17641](https://github.com/element-hq/synapse/issues/17641), [\#17654](https://github.com/element-hq/synapse/issues/17654), [\#17673](https://github.com/element-hq/synapse/issues/17673))
-- Store sliding sync per-connection state in the database. ([\#17599](https://github.com/element-hq/synapse/issues/17599), [\#17631](https://github.com/element-hq/synapse/issues/17631))
-- Make the sliding sync `PerConnectionState` class immutable. ([\#17600](https://github.com/element-hq/synapse/issues/17600))
-- Replace `isort` and `black` with `ruff`. ([\#17620](https://github.com/element-hq/synapse/issues/17620), [\#17643](https://github.com/element-hq/synapse/issues/17643))
-- Sliding Sync: Split up `get_room_membership_for_user_at_to_token`. ([\#17629](https://github.com/element-hq/synapse/issues/17629))
-- Use new database tables for sliding sync. ([\#17630](https://github.com/element-hq/synapse/issues/17630), [\#17649](https://github.com/element-hq/synapse/issues/17649))
-- Prevent duplicate tags being added to Sliding Sync traces. ([\#17655](https://github.com/element-hq/synapse/issues/17655))
-- Get `bump_stamp` from [new sliding sync tables](https://github.com/element-hq/synapse/pull/17512) which should be faster. ([\#17658](https://github.com/element-hq/synapse/issues/17658))
-- Speed up incremental Sliding Sync requests by avoiding extra work. ([\#17665](https://github.com/element-hq/synapse/issues/17665))
-- Small performance improvement in speeding up sliding sync. ([\#17666](https://github.com/element-hq/synapse/issues/17666), [\#17670](https://github.com/element-hq/synapse/issues/17670), [\#17672](https://github.com/element-hq/synapse/issues/17672))
-- Speed up sliding sync by reducing number of database calls. ([\#17684](https://github.com/element-hq/synapse/issues/17684))
-- Speed up sync by pulling out fewer events from the database. ([\#17688](https://github.com/element-hq/synapse/issues/17688))
-
-
-
-### Updates to locked dependencies
-
-* Bump authlib from 1.3.1 to 1.3.2. ([\#17679](https://github.com/element-hq/synapse/issues/17679))
-* Bump idna from 3.7 to 3.8. ([\#17682](https://github.com/element-hq/synapse/issues/17682))
-* Bump ruff from 0.6.2 to 0.6.4. ([\#17680](https://github.com/element-hq/synapse/issues/17680))
-* Bump towncrier from 24.7.1 to 24.8.0. ([\#17645](https://github.com/element-hq/synapse/issues/17645))
-* Bump twisted from 24.7.0rc1 to 24.7.0. ([\#17647](https://github.com/element-hq/synapse/issues/17647))
-* Bump types-pillow from 10.2.0.20240520 to 10.2.0.20240822. ([\#17644](https://github.com/element-hq/synapse/issues/17644))
-* Bump types-psycopg2 from 2.9.21.20240417 to 2.9.21.20240819. ([\#17646](https://github.com/element-hq/synapse/issues/17646))
-* Bump types-setuptools from 71.1.0.20240818 to 74.1.0.20240907. ([\#17681](https://github.com/element-hq/synapse/issues/17681))
-
-# Synapse 1.114.0 (2024-09-02)
-
-This release enables support for
-[MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) —
-Simplified Sliding Sync. This allows using the upcoming releases of the Element
-X mobile apps without having to run a Sliding Sync Proxy.
-
-
-### Features
-
-- Enable native sliding sync support ([MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) and [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186)) by default. ([\#17648](https://github.com/element-hq/synapse/issues/17648))
-
-
-
-
-# Synapse 1.114.0rc3 (2024-08-30)
-
-### Bugfixes
-
-- Fix regression in v1.114.0rc2 that caused workers to fail to start. ([\#17626](https://github.com/element-hq/synapse/issues/17626))
-
-
-
-
-# Synapse 1.114.0rc2 (2024-08-30)
-
-### Features
-
-- Improve cross-signing upload when using [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) to use a custom UIA flow stage, with web fallback support. ([\#17509](https://github.com/element-hq/synapse/issues/17509))
-- Make `hash_password` script accept password input from stdin. ([\#17608](https://github.com/element-hq/synapse/issues/17608))
-
-### Bugfixes
-
-- Fix hierarchy returning 403 when room is accessible through federation. Contributed by Krishan (@kfiven). ([\#17194](https://github.com/element-hq/synapse/issues/17194))
-- Fix content-length on federation `/thumbnail` responses. ([\#17532](https://github.com/element-hq/synapse/issues/17532))
-- Fix authenticated media responses using a wrong limit when following redirects over federation. ([\#17543](https://github.com/element-hq/synapse/issues/17543))
-
-### Internal Changes
-
-- MSC3861: load the issuer and account management URLs from OIDC discovery. ([\#17407](https://github.com/element-hq/synapse/issues/17407))
-- Refactor sliding sync class into multiple files. ([\#17595](https://github.com/element-hq/synapse/issues/17595))
-- Store sliding sync per-connection state in the database. ([\#17599](https://github.com/element-hq/synapse/issues/17599))
-- Make the sliding sync `PerConnectionState` class immutable. ([\#17600](https://github.com/element-hq/synapse/issues/17600))
-- Add support to `@tag_args` for standalone functions. ([\#17604](https://github.com/element-hq/synapse/issues/17604))
-- Speed up incremental syncs in sliding sync by adding some more caching. ([\#17606](https://github.com/element-hq/synapse/issues/17606))
-- Always return the user's own read receipts in sliding sync. ([\#17617](https://github.com/element-hq/synapse/issues/17617))
-- Replace `isort` and `black` with `ruff`. ([\#17620](https://github.com/element-hq/synapse/issues/17620))
-- Refactor sliding sync code to move room list logic out into a separate class. ([\#17622](https://github.com/element-hq/synapse/issues/17622))
-
-
-
-### Updates to locked dependencies
-
-* Bump attrs from 23.2.0 to 24.2.0. ([\#17609](https://github.com/element-hq/synapse/issues/17609))
-* Bump cryptography from 42.0.8 to 43.0.0. ([\#17584](https://github.com/element-hq/synapse/issues/17584))
-* Bump phonenumbers from 8.13.43 to 8.13.44. ([\#17610](https://github.com/element-hq/synapse/issues/17610))
-* Bump pygithub from 2.3.0 to 2.4.0. ([\#17612](https://github.com/element-hq/synapse/issues/17612))
-* Bump pyyaml from 6.0.1 to 6.0.2. ([\#17611](https://github.com/element-hq/synapse/issues/17611))
-* Bump sentry-sdk from 2.12.0 to 2.13.0. ([\#17585](https://github.com/element-hq/synapse/issues/17585))
-* Bump serde from 1.0.206 to 1.0.208. ([\#17581](https://github.com/element-hq/synapse/issues/17581))
-* Bump serde from 1.0.208 to 1.0.209. ([\#17613](https://github.com/element-hq/synapse/issues/17613))
-* Bump serde_json from 1.0.124 to 1.0.125. ([\#17582](https://github.com/element-hq/synapse/issues/17582))
-* Bump serde_json from 1.0.125 to 1.0.127. ([\#17614](https://github.com/element-hq/synapse/issues/17614))
-* Bump types-jsonschema from 4.23.0.20240712 to 4.23.0.20240813. ([\#17583](https://github.com/element-hq/synapse/issues/17583))
-* Bump types-setuptools from 71.1.0.20240726 to 71.1.0.20240818. ([\#17586](https://github.com/element-hq/synapse/issues/17586))
-
-# Synapse 1.114.0rc1 (2024-08-20)
-
-### Features
-
-- Add a flag to `/versions`, `org.matrix.simplified_msc3575`, to indicate whether experimental sliding sync support has been enabled. ([\#17571](https://github.com/element-hq/synapse/issues/17571))
-- Handle changes in `timeline_limit` in experimental sliding sync. ([\#17579](https://github.com/element-hq/synapse/issues/17579))
-- Correctly track read receipts that should be sent down in experimental sliding sync. ([\#17575](https://github.com/element-hq/synapse/issues/17575), [\#17589](https://github.com/element-hq/synapse/issues/17589), [\#17592](https://github.com/element-hq/synapse/issues/17592))
-
-### Bugfixes
-
-- Start handlers for new media endpoints when media resource configured. ([\#17483](https://github.com/element-hq/synapse/issues/17483))
-- Fix timeline ordering (using `stream_ordering` instead of topological ordering) in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17510](https://github.com/element-hq/synapse/issues/17510))
-- Fix experimental sliding sync implementation to remember any updates in rooms that were not sent down immediately. ([\#17535](https://github.com/element-hq/synapse/issues/17535))
-- Better exclude partially stated rooms if we must await full state in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17538](https://github.com/element-hq/synapse/issues/17538))
-- Handle lower-case http headers in `_Mulitpart_Parser_Protocol`. ([\#17545](https://github.com/element-hq/synapse/issues/17545))
-- Fix fetching federation signing keys from servers that omit `old_verify_keys`. Contributed by @tulir @ Beeper. ([\#17568](https://github.com/element-hq/synapse/issues/17568))
-- Fix bug where we would respond with an error when a remote server asked for media that had a length of 0, using the new multipart federation media endpoint. ([\#17570](https://github.com/element-hq/synapse/issues/17570))
-
-### Improved Documentation
-
-- Clarify default behaviour of the
-  [`auto_accept_invites.worker_to_run_on`](https://element-hq.github.io/synapse/develop/usage/configuration/config_documentation.html#auto-accept-invites)
-  option. ([\#17515](https://github.com/element-hq/synapse/issues/17515))
-- Improve docstrings for profile methods. ([\#17559](https://github.com/element-hq/synapse/issues/17559))
-
-### Internal Changes
-
-- Add more tracing to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17514](https://github.com/element-hq/synapse/issues/17514))
-- Fixup comment in sliding sync implementation. ([\#17531](https://github.com/element-hq/synapse/issues/17531))
-- Replace override of deprecated method `HTTPAdapter.get_connection` with `get_connection_with_tls_context`. ([\#17536](https://github.com/element-hq/synapse/issues/17536))
-- Fix performance of device lists in `/key/changes` and sliding sync. ([\#17537](https://github.com/element-hq/synapse/issues/17537), [\#17548](https://github.com/element-hq/synapse/issues/17548))
-- Bump setuptools from 67.6.0 to 72.1.0. ([\#17542](https://github.com/element-hq/synapse/issues/17542))
-- Add a utility function for generating random event IDs. ([\#17557](https://github.com/element-hq/synapse/issues/17557))
-- Speed up responding to media requests. ([\#17558](https://github.com/element-hq/synapse/issues/17558), [\#17561](https://github.com/element-hq/synapse/issues/17561), [\#17564](https://github.com/element-hq/synapse/issues/17564), [\#17566](https://github.com/element-hq/synapse/issues/17566), [\#17567](https://github.com/element-hq/synapse/issues/17567), [\#17569](https://github.com/element-hq/synapse/issues/17569))
-- Test github token before running release script steps. ([\#17562](https://github.com/element-hq/synapse/issues/17562))
-- Reduce log spam of multipart files. ([\#17563](https://github.com/element-hq/synapse/issues/17563))
-- Refactor per-connection state in experimental sliding sync handler. ([\#17574](https://github.com/element-hq/synapse/issues/17574))
-- Add histogram metrics for sliding sync processing time. ([\#17593](https://github.com/element-hq/synapse/issues/17593))
-
-
-
-### Updates to locked dependencies
-
-* Bump bytes from 1.6.1 to 1.7.1. ([\#17526](https://github.com/element-hq/synapse/issues/17526))
-* Bump lxml from 5.2.2 to 5.3.0. ([\#17550](https://github.com/element-hq/synapse/issues/17550))
-* Bump phonenumbers from 8.13.42 to 8.13.43. ([\#17551](https://github.com/element-hq/synapse/issues/17551))
-* Bump regex from 1.10.5 to 1.10.6. ([\#17527](https://github.com/element-hq/synapse/issues/17527))
-* Bump sentry-sdk from 2.10.0 to 2.12.0. ([\#17553](https://github.com/element-hq/synapse/issues/17553))
-* Bump serde from 1.0.204 to 1.0.206. ([\#17556](https://github.com/element-hq/synapse/issues/17556))
-* Bump serde_json from 1.0.122 to 1.0.124. ([\#17555](https://github.com/element-hq/synapse/issues/17555))
-* Bump sigstore/cosign-installer from 3.5.0 to 3.6.0. ([\#17549](https://github.com/element-hq/synapse/issues/17549))
-* Bump types-pyyaml from 6.0.12.20240311 to 6.0.12.20240808. ([\#17552](https://github.com/element-hq/synapse/issues/17552))
-* Bump types-requests from 2.31.0.20240406 to 2.32.0.20240712. ([\#17524](https://github.com/element-hq/synapse/issues/17524))
-
-# Synapse 1.113.0 (2024-08-13)
-
-No significant changes since 1.113.0rc1.
-
-
-
-
-# Synapse 1.113.0rc1 (2024-08-06)
-
-### Features
-
-- Track which rooms have been sent to clients in the experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17447](https://github.com/element-hq/synapse/issues/17447))
-- Add Account Data extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17477](https://github.com/element-hq/synapse/issues/17477))
-- Add receipts extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17489](https://github.com/element-hq/synapse/issues/17489))
-- Add typing notification extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17505](https://github.com/element-hq/synapse/issues/17505))
-
-### Bugfixes
-
-- Update experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint to handle invite/knock rooms when filtering. ([\#17450](https://github.com/element-hq/synapse/issues/17450))
-- Fix a bug introduced in v1.110.0 which caused `/keys/query` to return incomplete results, leading to high network activity and CPU usage on Matrix clients. ([\#17499](https://github.com/element-hq/synapse/issues/17499))
-
-### Improved Documentation
-
-- Update the [`allowed_local_3pids`](https://element-hq.github.io/synapse/v1.112/usage/configuration/config_documentation.html#allowed_local_3pids) config option's msisdn address to a working example. ([\#17476](https://github.com/element-hq/synapse/issues/17476))
-
-### Internal Changes
-
-- Change sliding sync to use their own token format in preparation for storing per-connection state. ([\#17452](https://github.com/element-hq/synapse/issues/17452))
-- Ensure we don't send down negative `bump_stamp` in experimental sliding sync endpoint. ([\#17478](https://github.com/element-hq/synapse/issues/17478))
-- Do not send down empty room entries down experimental sliding sync endpoint. ([\#17479](https://github.com/element-hq/synapse/issues/17479))
-- Refactor Sliding Sync tests to better utilize the `SlidingSyncBase`. ([\#17481](https://github.com/element-hq/synapse/issues/17481), [\#17482](https://github.com/element-hq/synapse/issues/17482))
-- Add some opentracing tags and logging to the experimental sliding sync implementation. ([\#17501](https://github.com/element-hq/synapse/issues/17501))
-- Split and move Sliding Sync tests so we have some more sane test file sizes. ([\#17504](https://github.com/element-hq/synapse/issues/17504))
-- Update the `limited` field description in the Sliding Sync response to accurately describe what it actually represents. ([\#17507](https://github.com/element-hq/synapse/issues/17507))
-- Easier to understand `timeline` assertions in Sliding Sync tests. ([\#17511](https://github.com/element-hq/synapse/issues/17511))
-- Reset the sliding sync connection if we don't recognize the per-connection state position. ([\#17529](https://github.com/element-hq/synapse/issues/17529))
-
-
-
-### Updates to locked dependencies
-
-* Bump bcrypt from 4.1.3 to 4.2.0. ([\#17495](https://github.com/element-hq/synapse/issues/17495))
-* Bump black from 24.4.2 to 24.8.0. ([\#17522](https://github.com/element-hq/synapse/issues/17522))
-* Bump phonenumbers from 8.13.39 to 8.13.42. ([\#17521](https://github.com/element-hq/synapse/issues/17521))
-* Bump ruff from 0.5.4 to 0.5.5. ([\#17494](https://github.com/element-hq/synapse/issues/17494))
-* Bump serde_json from 1.0.120 to 1.0.121. ([\#17493](https://github.com/element-hq/synapse/issues/17493))
-* Bump serde_json from 1.0.121 to 1.0.122. ([\#17525](https://github.com/element-hq/synapse/issues/17525))
-* Bump towncrier from 23.11.0 to 24.7.1. ([\#17523](https://github.com/element-hq/synapse/issues/17523))
-* Bump types-pyopenssl from 24.1.0.20240425 to 24.1.0.20240722. ([\#17496](https://github.com/element-hq/synapse/issues/17496))
-* Bump types-setuptools from 70.1.0.20240627 to 71.1.0.20240726. ([\#17497](https://github.com/element-hq/synapse/issues/17497))
-
-# Synapse 1.112.0 (2024-07-30)
-
-This security release is to update our locked dependency on Twisted to 24.7.0rc1, which includes a security fix for [CVE-2024-41671 / GHSA-c8m8-j448-xjx7: Disordered HTTP pipeline response in twisted.web, again](https://github.com/twisted/twisted/security/advisories/GHSA-c8m8-j448-xjx7).
-
-Note that this security fix is also available as **Synapse 1.111.1**, which does not include the rest of the changes in Synapse 1.112.0.
-
-This issue means that, if multiple HTTP requests are pipelined in the same TCP connection, Synapse can send responses to the wrong HTTP request.
-If a reverse proxy was configured to use HTTP pipelining, this could result in responses being sent to the wrong user, severely harming confidentiality.
-
-With that said, despite being a high severity issue, **we consider it unlikely that Synapse installations will be affected**.
-The use of HTTP pipelining in this fashion would cause worse performance for clients (request-response latencies would be increased as users' responses would be artificially blocked behind other users' slow requests). Further, Nginx and Haproxy, two common reverse proxies, do not appear to support configuring their upstreams to use HTTP pipelining and thus would not be affected. For both of these reasons, we consider it unlikely that a Synapse deployment would be set up in such a configuration.
-
-Despite that, we cannot rule out that some installations may exist with this unusual setup and so we are releasing this security update today.
-
-**pip users:** Note that by default, upgrading Synapse using pip will not automatically upgrade Twisted. **Please manually install the new version of Twisted** using `pip install Twisted==24.7.0rc1`. Note also that even the `--upgrade-strategy=eager` flag to `pip install -U matrix-synapse` will not upgrade Twisted to a patched version because it is only a release candidate at this time.
-
-### Internal Changes
-
-- Upgrade locked dependency on Twisted to 24.7.0rc1. ([\#17502](https://github.com/element-hq/synapse/issues/17502))
-
-
-# Synapse 1.112.0rc1 (2024-07-23)
-
-Please note that this release candidate does not include the security dependency update
-included in version 1.111.1 as this version was released before 1.111.1.
-The same security fix can be found in the full release of 1.112.0.
-
-### Features
-
-- Add to-device extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17416](https://github.com/element-hq/synapse/issues/17416))
-- Populate `name`/`avatar` fields in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17418](https://github.com/element-hq/synapse/issues/17418))
-- Populate `heroes` and room summary fields (`joined_count`, `invited_count`) in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17419](https://github.com/element-hq/synapse/issues/17419))
-- Populate `is_dm` room field in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17429](https://github.com/element-hq/synapse/issues/17429))
-- Add room subscriptions to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17432](https://github.com/element-hq/synapse/issues/17432))
-- Prepare for authenticated media freeze. ([\#17433](https://github.com/element-hq/synapse/issues/17433))
-- Add E2EE extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17454](https://github.com/element-hq/synapse/issues/17454))
-
-### Bugfixes
-
-- Add configurable option to always include offline users in presence sync results. Contributed by @Michael-Hollister. ([\#17231](https://github.com/element-hq/synapse/issues/17231))
-- Fix bug in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint when using room type filters and the user has one or more remote invites. ([\#17434](https://github.com/element-hq/synapse/issues/17434))
-- Order `heroes` by `stream_ordering` as the Matrix specification states (applies to `/sync`). ([\#17435](https://github.com/element-hq/synapse/issues/17435))
-- Fix rare bug where `/sync` would break for a user when using workers with multiple stream writers. ([\#17438](https://github.com/element-hq/synapse/issues/17438))
-
-### Improved Documentation
-
-- Update the readme image to have a white background, so that it is readable in dark mode. ([\#17387](https://github.com/element-hq/synapse/issues/17387))
-- Add Red Hat Enterprise Linux and Rocky Linux 8 and 9 installation instructions. ([\#17423](https://github.com/element-hq/synapse/issues/17423))
-- Improve documentation for the [`default_power_level_content_override`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#default_power_level_content_override) config option. ([\#17451](https://github.com/element-hq/synapse/issues/17451))
-
-### Internal Changes
-
-- Make sure we always use the right logic for enabling the media repo. ([\#17424](https://github.com/element-hq/synapse/issues/17424))
-- Fix argument documentation for method `RateLimiter.record_action`. ([\#17426](https://github.com/element-hq/synapse/issues/17426))
-- Reduce volume of 'Waiting for current token' logs, which were introduced in v1.109.0. ([\#17428](https://github.com/element-hq/synapse/issues/17428))
-- Limit concurrent remote downloads to 6 per IP address, and decrement remote downloads without a content-length from the ratelimiter after the download is complete. ([\#17439](https://github.com/element-hq/synapse/issues/17439))
-- Remove unnecessary call to resume producing in fake channel. ([\#17449](https://github.com/element-hq/synapse/issues/17449))
-- Update experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint to bump room when it is created. ([\#17453](https://github.com/element-hq/synapse/issues/17453))
-- Speed up generating sliding sync responses. ([\#17458](https://github.com/element-hq/synapse/issues/17458))
-- Add cache to `get_rooms_for_local_user_where_membership_is` to speed up sliding sync. ([\#17460](https://github.com/element-hq/synapse/issues/17460))
-- Speed up fetching room keys from backup. ([\#17461](https://github.com/element-hq/synapse/issues/17461))
-- Speed up sorting of the room list in sliding sync. ([\#17468](https://github.com/element-hq/synapse/issues/17468))
-- Implement handling of `$ME` as a state key in sliding sync. ([\#17469](https://github.com/element-hq/synapse/issues/17469))
-
-
-
-### Updates to locked dependencies
-
-* Bump bytes from 1.6.0 to 1.6.1. ([\#17441](https://github.com/element-hq/synapse/issues/17441))
-* Bump hiredis from 2.3.2 to 3.0.0. ([\#17464](https://github.com/element-hq/synapse/issues/17464))
-* Bump jsonschema from 4.22.0 to 4.23.0. ([\#17444](https://github.com/element-hq/synapse/issues/17444))
-* Bump matrix-org/done-action from 2 to 3. ([\#17440](https://github.com/element-hq/synapse/issues/17440))
-* Bump mypy from 1.9.0 to 1.10.1. ([\#17445](https://github.com/element-hq/synapse/issues/17445))
-* Bump pyopenssl from 24.1.0 to 24.2.1. ([\#17465](https://github.com/element-hq/synapse/issues/17465))
-* Bump ruff from 0.5.0 to 0.5.4. ([\#17466](https://github.com/element-hq/synapse/issues/17466))
-* Bump sentry-sdk from 2.6.0 to 2.8.0. ([\#17456](https://github.com/element-hq/synapse/issues/17456))
-* Bump sentry-sdk from 2.8.0 to 2.10.0. ([\#17467](https://github.com/element-hq/synapse/issues/17467))
-* Bump setuptools from 67.6.0 to 70.0.0. ([\#17448](https://github.com/element-hq/synapse/issues/17448))
-* Bump twine from 5.1.0 to 5.1.1. ([\#17443](https://github.com/element-hq/synapse/issues/17443))
-* Bump types-jsonschema from 4.22.0.20240610 to 4.23.0.20240712. ([\#17446](https://github.com/element-hq/synapse/issues/17446))
-* Bump ulid from 1.1.2 to 1.1.3. ([\#17442](https://github.com/element-hq/synapse/issues/17442))
-* Bump zipp from 3.15.0 to 3.19.1. ([\#17427](https://github.com/element-hq/synapse/issues/17427))
-
-
-# Synapse 1.111.1 (2024-07-30)
-
-This security release is to update our locked dependency on Twisted to 24.7.0rc1, which includes a security fix for [CVE-2024-41671 / GHSA-c8m8-j448-xjx7: Disordered HTTP pipeline response in twisted.web, again](https://github.com/twisted/twisted/security/advisories/GHSA-c8m8-j448-xjx7).
-
-This issue means that, if multiple HTTP requests are pipelined in the same TCP connection, Synapse can send responses to the wrong HTTP request.
-If a reverse proxy was configured to use HTTP pipelining, this could result in responses being sent to the wrong user, severely harming confidentiality.
-
-With that said, despite being a high severity issue, **we consider it unlikely that Synapse installations will be affected**.
-The use of HTTP pipelining in this fashion would cause worse performance for clients (request-response latencies would be increased as users' responses would be artificially blocked behind other users' slow requests). Further, Nginx and Haproxy, two common reverse proxies, do not appear to support configuring their upstreams to use HTTP pipelining and thus would not be affected. For both of these reasons, we consider it unlikely that a Synapse deployment would be set up in such a configuration.
-
-Despite that, we cannot rule out that some installations may exist with this unusual setup and so we are releasing this security update today.
-
-**pip users:** Note that by default, upgrading Synapse using pip will not automatically upgrade Twisted. **Please manually install the new version of Twisted** using `pip install Twisted==24.7.0rc1`. Note also that even the `--upgrade-strategy=eager` flag to `pip install -U matrix-synapse` will not upgrade Twisted to a patched version because it is only a release candidate at this time.
-
-
-### Internal Changes
-
-- Upgrade locked dependency on Twisted to 24.7.0rc1. ([\#17502](https://github.com/element-hq/synapse/issues/17502))
-
-
-# Synapse 1.111.0 (2024-07-16)
-
-No significant changes since 1.111.0rc2.
-
-
-
-
-# Synapse 1.111.0rc2 (2024-07-10)
-
-### Bugfixes
-
-- Fix bug where using `synapse.app.media_repository` worker configuration would break the new media endpoints. ([\#17420](https://github.com/element-hq/synapse/issues/17420))
-
-### Improved Documentation
-
-- Document the new federation media worker endpoints in the [upgrade notes](https://element-hq.github.io/synapse/v1.111/upgrade.html) and [worker docs](https://element-hq.github.io/synapse/v1.111/workers.html). ([\#17421](https://github.com/element-hq/synapse/issues/17421))
-
-### Internal Changes
-
-- Route authenticated federation media requests to media repository workers in Complement tests. ([\#17422](https://github.com/element-hq/synapse/issues/17422))
-
-
-
-
-# Synapse 1.111.0rc1 (2024-07-09)
-
-### Features
-
-- Add `rooms` data to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17320](https://github.com/element-hq/synapse/issues/17320))
-- Add `room_types`/`not_room_types` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17337](https://github.com/element-hq/synapse/issues/17337))
-- Return "required state" in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17342](https://github.com/element-hq/synapse/issues/17342))
-- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/blob/main/proposals/3916-authentication-for-media.md) by adding [`_matrix/client/v1/media/download`](https://spec.matrix.org/v1.11/client-server-api/#get_matrixclientv1mediadownloadservernamemediaid) endpoint. ([\#17365](https://github.com/element-hq/synapse/issues/17365))
-- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/blob/rav/authentication-for-media/proposals/3916-authentication-for-media.md)
-  by adding [`_matrix/client/v1/media/thumbnail`](https://spec.matrix.org/v1.11/client-server-api/#get_matrixclientv1mediathumbnailservernamemediaid), [`_matrix/federation/v1/media/thumbnail`](https://spec.matrix.org/v1.11/server-server-api/#get_matrixfederationv1mediathumbnailmediaid) endpoints and stabilizing the
-  remaining [`_matrix/client/v1/media`](https://spec.matrix.org/v1.11/client-server-api/#get_matrixclientv1mediaconfig) endpoints. ([\#17388](https://github.com/element-hq/synapse/issues/17388))
-- Add `rooms.bump_stamp` for easier client-side sorting in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17395](https://github.com/element-hq/synapse/issues/17395))
-- Forget all of a user's rooms upon deactivation, preventing local room purges from being blocked on deactivated users. ([\#17400](https://github.com/element-hq/synapse/issues/17400))
-- Declare support for [Matrix 1.11](https://matrix.org/blog/2024/06/20/matrix-v1.11-release/). ([\#17403](https://github.com/element-hq/synapse/issues/17403))
-- [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861): allow overriding the introspection endpoint. ([\#17406](https://github.com/element-hq/synapse/issues/17406))
-
-### Bugfixes
-
-- Fix rare race which caused no new to-device messages to be received from remote server. ([\#17362](https://github.com/element-hq/synapse/issues/17362))
-- Fix bug in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint when using an old database. ([\#17398](https://github.com/element-hq/synapse/issues/17398))
-
-### Improved Documentation
-
-- Clarify that `url_preview_url_blacklist` is a usability feature. ([\#17356](https://github.com/element-hq/synapse/issues/17356))
-- Fix broken links in README. ([\#17379](https://github.com/element-hq/synapse/issues/17379))
-- Clarify that changelog content *and file extension* need to match in order for entries to merge. ([\#17399](https://github.com/element-hq/synapse/issues/17399))
-
-### Internal Changes
-
-- Make the release script create a release branch for Complement as well. ([\#17318](https://github.com/element-hq/synapse/issues/17318))
-- Fix uploading packages to PyPi. ([\#17363](https://github.com/element-hq/synapse/issues/17363))
-- Add CI check for the README. ([\#17367](https://github.com/element-hq/synapse/issues/17367))
-- Fix linting errors from new `ruff` version. ([\#17381](https://github.com/element-hq/synapse/issues/17381), [\#17411](https://github.com/element-hq/synapse/issues/17411))
-- Fix building debian packages on non-clean checkouts. ([\#17390](https://github.com/element-hq/synapse/issues/17390))
-- Finish up work to allow per-user feature flags. ([\#17392](https://github.com/element-hq/synapse/issues/17392), [\#17410](https://github.com/element-hq/synapse/issues/17410))
-- Allow enabling sliding sync per-user. ([\#17393](https://github.com/element-hq/synapse/issues/17393))
-
-
-
-### Updates to locked dependencies
-
-* Bump certifi from 2023.7.22 to 2024.7.4. ([\#17404](https://github.com/element-hq/synapse/issues/17404))
-* Bump cryptography from 42.0.7 to 42.0.8. ([\#17382](https://github.com/element-hq/synapse/issues/17382))
-* Bump ijson from 3.2.3 to 3.3.0. ([\#17413](https://github.com/element-hq/synapse/issues/17413))
-* Bump log from 0.4.21 to 0.4.22. ([\#17384](https://github.com/element-hq/synapse/issues/17384))
-* Bump mypy-zope from 1.0.4 to 1.0.5. ([\#17414](https://github.com/element-hq/synapse/issues/17414))
-* Bump pillow from 10.3.0 to 10.4.0. ([\#17412](https://github.com/element-hq/synapse/issues/17412))
-* Bump pydantic from 2.7.1 to 2.8.2. ([\#17415](https://github.com/element-hq/synapse/issues/17415))
-* Bump ruff from 0.3.7 to 0.5.0. ([\#17381](https://github.com/element-hq/synapse/issues/17381))
-* Bump serde from 1.0.203 to 1.0.204. ([\#17409](https://github.com/element-hq/synapse/issues/17409))
-* Bump serde_json from 1.0.117 to 1.0.120. ([\#17385](https://github.com/element-hq/synapse/issues/17385), [\#17408](https://github.com/element-hq/synapse/issues/17408))
-* Bump types-setuptools from 69.5.0.20240423 to 70.1.0.20240627. ([\#17380](https://github.com/element-hq/synapse/issues/17380))
-
-# Synapse 1.110.0 (2024-07-03)
-
-No significant changes since 1.110.0rc3.
-
-
-
-
-# Synapse 1.110.0rc3 (2024-07-02)
-
-### Bugfixes
-
-- Fix bug where `/sync` requests could get blocked indefinitely after an upgrade from Synapse versions before v1.109.0. ([\#17386](https://github.com/element-hq/synapse/issues/17386), [\#17391](https://github.com/element-hq/synapse/issues/17391))
-
-### Internal Changes
-
-- Limit size of presence EDUs to 50 entries. ([\#17371](https://github.com/element-hq/synapse/issues/17371))
-- Fix building debian package for debian sid. ([\#17389](https://github.com/element-hq/synapse/issues/17389))
-
-
-
-
-# Synapse 1.110.0rc2 (2024-06-26)
-
-### Internal Changes
-
-- Fix uploading packages to PyPi. ([\#17363](https://github.com/element-hq/synapse/issues/17363))
-
-
-
-
-# Synapse 1.110.0rc1 (2024-06-26)
-
-### Features
-
-- Add initial implementation of an experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17187](https://github.com/element-hq/synapse/issues/17187))
-- Add experimental support for [MSC3823](https://github.com/matrix-org/matrix-spec-proposals/pull/3823) - Account suspension. ([\#17255](https://github.com/element-hq/synapse/issues/17255))
-- Improve ratelimiting in Synapse. ([\#17256](https://github.com/element-hq/synapse/issues/17256))
-- Add support for the unstable [MSC4151](https://github.com/matrix-org/matrix-spec-proposals/pull/4151) report room API. ([\#17270](https://github.com/element-hq/synapse/issues/17270), [\#17296](https://github.com/element-hq/synapse/issues/17296))
-- Filter for public and empty rooms added to Admin-API [List Room API](https://element-hq.github.io/synapse/latest/admin_api/rooms.html#list-room-api). ([\#17276](https://github.com/element-hq/synapse/issues/17276))
-- Add `is_dm` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17277](https://github.com/element-hq/synapse/issues/17277))
-- Add `is_encrypted` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17281](https://github.com/element-hq/synapse/issues/17281))
-- Include user membership in events served to clients, per [MSC4115](https://github.com/matrix-org/matrix-spec-proposals/pull/4115). ([\#17282](https://github.com/element-hq/synapse/issues/17282))
-- Do not require user-interactive authentication for uploading cross-signing keys for the first time, per [MSC3967](https://github.com/matrix-org/matrix-spec-proposals/pull/3967). ([\#17284](https://github.com/element-hq/synapse/issues/17284))
-- Add `stream_ordering` sort to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17293](https://github.com/element-hq/synapse/issues/17293))
-- `register_new_matrix_user` now supports a --password-file flag, which
-  is useful for scripting. ([\#17294](https://github.com/element-hq/synapse/issues/17294))
-- `register_new_matrix_user` now supports a --exists-ok flag to allow registration of users that already exist in the database.
-  This is useful for scripts that bootstrap user accounts with initial passwords. ([\#17304](https://github.com/element-hq/synapse/issues/17304))
-- Add support for via query parameter from [MSC4156](https://github.com/matrix-org/matrix-spec-proposals/pull/4156). ([\#17322](https://github.com/element-hq/synapse/issues/17322))
-- Add `is_invite` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17335](https://github.com/element-hq/synapse/issues/17335))
-- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/blob/main/proposals/3916-authentication-for-media.md) by adding a federation /download endpoint. ([\#17350](https://github.com/element-hq/synapse/issues/17350))
-
-### Bugfixes
-
-- Fix searching for users with their exact localpart whose ID includes a hyphen. ([\#17254](https://github.com/element-hq/synapse/issues/17254))
-- Fix wrong retention policy being used when filtering events. ([\#17272](https://github.com/element-hq/synapse/issues/17272))
-- Fix bug where OTKs were not always included in `/sync` response when using workers. ([\#17275](https://github.com/element-hq/synapse/issues/17275))
-- Fix a long-standing bug where an invalid 'from' parameter to [`/notifications`](https://spec.matrix.org/v1.10/client-server-api/#get_matrixclientv3notifications) would result in an Internal Server Error. ([\#17283](https://github.com/element-hq/synapse/issues/17283))
-- Fix edge case in `/sync` returning the wrong the state when using sharded event persisters. ([\#17295](https://github.com/element-hq/synapse/issues/17295))
-- Add initial implementation of an experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17301](https://github.com/element-hq/synapse/issues/17301))
-- Fix email notification subject when invited to a space. ([\#17336](https://github.com/element-hq/synapse/issues/17336))
-
-### Improved Documentation
-
-- Add missing quotes for example for `exclude_rooms_from_sync`. ([\#17308](https://github.com/element-hq/synapse/issues/17308))
-- Update header in the README to visually fix the the auto-generated table of contents. ([\#17329](https://github.com/element-hq/synapse/issues/17329))
-- Fix stale references to the Foundation's Security Disclosure Policy. ([\#17341](https://github.com/element-hq/synapse/issues/17341))
-- Add default values for `rc_invites.per_issuer` to docs. ([\#17347](https://github.com/element-hq/synapse/issues/17347))
-- Fix an error in the docs for `search_all_users` parameter under `user_directory`. ([\#17348](https://github.com/element-hq/synapse/issues/17348))
-
-### Internal Changes
-
-- Remove unused `expire_access_token` option in the Synapse Docker config file. Contributed by @AaronDewes. ([\#17198](https://github.com/element-hq/synapse/issues/17198))
-- Use fully-qualified `PersistedEventPosition` when returning `RoomsForUser` to facilitate proper comparisons and `RoomStreamToken` generation. ([\#17265](https://github.com/element-hq/synapse/issues/17265))
-- Add debug logging for when room keys are uploaded, including whether they are replacing other room keys. ([\#17266](https://github.com/element-hq/synapse/issues/17266))
-- Handle OTK uploads off master. ([\#17271](https://github.com/element-hq/synapse/issues/17271))
-- Don't try and resync devices for remote users whose servers are marked as down. ([\#17273](https://github.com/element-hq/synapse/issues/17273))
-- Re-organize Pydantic models and types used in handlers. ([\#17279](https://github.com/element-hq/synapse/issues/17279))
-- Expose the worker instance that persisted the event on `event.internal_metadata.instance_name`. ([\#17300](https://github.com/element-hq/synapse/issues/17300))
-- Update the README with Element branding, improve headers and fix the #synapse:matrix.org support room link rendering. ([\#17324](https://github.com/element-hq/synapse/issues/17324))
-- Change path of the experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync implementation to `/org.matrix.simplified_msc3575/sync` since our simplified API is slightly incompatible with what's in the current MSC. ([\#17331](https://github.com/element-hq/synapse/issues/17331))
-- Handle device lists notifications for large accounts more efficiently in worker mode. ([\#17333](https://github.com/element-hq/synapse/issues/17333), [\#17358](https://github.com/element-hq/synapse/issues/17358))
-- Do not block event sending/receiving while calculating large event auth chains. ([\#17338](https://github.com/element-hq/synapse/issues/17338))
-- Tidy up `parse_integer` docs and call sites to reflect the fact that they require non-negative integers by default, and bring `parse_integer_from_args` default in alignment. Contributed by Denis Kasak (@dkasak). ([\#17339](https://github.com/element-hq/synapse/issues/17339))
-
-
-
-### Updates to locked dependencies
-
-* Bump authlib from 1.3.0 to 1.3.1. ([\#17343](https://github.com/element-hq/synapse/issues/17343))
-* Bump dawidd6/action-download-artifact from 3.1.4 to 5. ([\#17289](https://github.com/element-hq/synapse/issues/17289))
-* Bump dawidd6/action-download-artifact from 5 to 6. ([\#17313](https://github.com/element-hq/synapse/issues/17313))
-* Bump docker/build-push-action from 5 to 6. ([\#17312](https://github.com/element-hq/synapse/issues/17312))
-* Bump jinja2 from 3.1.3 to 3.1.4. ([\#17287](https://github.com/element-hq/synapse/issues/17287))
-* Bump lazy_static from 1.4.0 to 1.5.0. ([\#17355](https://github.com/element-hq/synapse/issues/17355))
-* Bump msgpack from 1.0.7 to 1.0.8. ([\#17317](https://github.com/element-hq/synapse/issues/17317))
-* Bump netaddr from 1.2.1 to 1.3.0. ([\#17353](https://github.com/element-hq/synapse/issues/17353))
-* Bump packaging from 24.0 to 24.1. ([\#17352](https://github.com/element-hq/synapse/issues/17352))
-* Bump phonenumbers from 8.13.37 to 8.13.39. ([\#17315](https://github.com/element-hq/synapse/issues/17315))
-* Bump regex from 1.10.4 to 1.10.5. ([\#17290](https://github.com/element-hq/synapse/issues/17290))
-* Bump requests from 2.31.0 to 2.32.2. ([\#17345](https://github.com/element-hq/synapse/issues/17345))
-* Bump sentry-sdk from 2.1.1 to 2.3.1. ([\#17263](https://github.com/element-hq/synapse/issues/17263))
-* Bump sentry-sdk from 2.3.1 to 2.6.0. ([\#17351](https://github.com/element-hq/synapse/issues/17351))
-* Bump tornado from 6.4 to 6.4.1. ([\#17344](https://github.com/element-hq/synapse/issues/17344))
-* Bump mypy from 1.8.0 to 1.9.0. ([\#17297](https://github.com/element-hq/synapse/issues/17297))
-* Bump types-jsonschema from 4.21.0.20240311 to 4.22.0.20240610. ([\#17288](https://github.com/element-hq/synapse/issues/17288))
-* Bump types-netaddr from 1.2.0.20240219 to 1.3.0.20240530. ([\#17314](https://github.com/element-hq/synapse/issues/17314))
-* Bump types-pillow from 10.2.0.20240423 to 10.2.0.20240520. ([\#17285](https://github.com/element-hq/synapse/issues/17285))
-* Bump types-pyyaml from 6.0.12.12 to 6.0.12.20240311. ([\#17316](https://github.com/element-hq/synapse/issues/17316))
-* Bump typing-extensions from 4.11.0 to 4.12.2. ([\#17354](https://github.com/element-hq/synapse/issues/17354))
-* Bump urllib3 from 2.0.7 to 2.2.2. ([\#17346](https://github.com/element-hq/synapse/issues/17346))
-
-# Synapse 1.109.0 (2024-06-18)
-
-### Internal Changes
-
-- Fix the building of binary wheels for macOS by switching to macOS 12 CI runners. ([\#17319](https://github.com/element-hq/synapse/issues/17319))
-
-
-
-
-# Synapse 1.109.0rc3 (2024-06-17)
-
-### Bugfixes
-
-- When rolling back to a previous Synapse version and then forwards again to this release, don't require server operators to manually run SQL. ([\#17305](https://github.com/element-hq/synapse/issues/17305), [\#17309](https://github.com/element-hq/synapse/issues/17309))
-
-### Internal Changes
-
-- Use the release branch for sytest in release-branch PRs. ([\#17306](https://github.com/element-hq/synapse/issues/17306))
-
-
-
-
-# Synapse 1.109.0rc2 (2024-06-11)
-
-### Bugfixes
-
-- Fix bug where one-time-keys were not always included in `/sync` response when using workers. Introduced in v1.109.0rc1. ([\#17275](https://github.com/element-hq/synapse/issues/17275))
-- Fix bug where `/sync` could get stuck due to edge case in device lists handling. Introduced in v1.109.0rc1. ([\#17292](https://github.com/element-hq/synapse/issues/17292))
-
-
-
-
-# Synapse 1.109.0rc1 (2024-06-04)
-
-### Features
-
-- Add the ability to auto-accept invites on the behalf of users. See the [`auto_accept_invites`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#auto-accept-invites) config option for details. ([\#17147](https://github.com/element-hq/synapse/issues/17147))
-- Add experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync/e2ee` endpoint for to-device messages and device encryption info. ([\#17167](https://github.com/element-hq/synapse/issues/17167))
-- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/issues/3916) by adding unstable media endpoints to `/_matrix/client`. ([\#17213](https://github.com/element-hq/synapse/issues/17213))
-- Add logging to tasks managed by the task scheduler, showing CPU and database usage. ([\#17219](https://github.com/element-hq/synapse/issues/17219))
-
-### Bugfixes
-
-- Fix deduplicating of membership events to not create unused state groups. ([\#17164](https://github.com/element-hq/synapse/issues/17164))
-- Fix bug where duplicate events could be sent down sync when using workers that are overloaded. ([\#17215](https://github.com/element-hq/synapse/issues/17215))
-- Ignore attempts to send to-device messages to bad users, to avoid log spam when we try to connect to the bad server. ([\#17240](https://github.com/element-hq/synapse/issues/17240))
-- Fix handling of duplicate concurrent uploading of device one-time-keys. ([\#17241](https://github.com/element-hq/synapse/issues/17241))
-- Fix reporting of default tags to Sentry, such as worker name. Broke in v1.108.0. ([\#17251](https://github.com/element-hq/synapse/issues/17251))
-- Fix bug where typing updates would not be sent when using workers after a restart. ([\#17252](https://github.com/element-hq/synapse/issues/17252))
-
-### Improved Documentation
-
-- Update the LemonLDAP documentation to say that claims should be explicitly included in the returned `id_token`, as Synapse won't request them. ([\#17204](https://github.com/element-hq/synapse/issues/17204))
-
-### Internal Changes
-
-- Improve DB usage when fetching related events. ([\#17083](https://github.com/element-hq/synapse/issues/17083))
-- Log exceptions when failing to auto-join new user according to the `auto_join_rooms` option. ([\#17176](https://github.com/element-hq/synapse/issues/17176))
-- Reduce work of calculating outbound device lists updates. ([\#17211](https://github.com/element-hq/synapse/issues/17211))
-- Improve performance of calculating device lists changes in `/sync`. ([\#17216](https://github.com/element-hq/synapse/issues/17216))
-- Move towards using `MultiWriterIdGenerator` everywhere. ([\#17226](https://github.com/element-hq/synapse/issues/17226))
-- Replaces all usages of `StreamIdGenerator` with `MultiWriterIdGenerator`. ([\#17229](https://github.com/element-hq/synapse/issues/17229))
-- Change the `allow_unsafe_locale` config option to also apply when setting up new databases. ([\#17238](https://github.com/element-hq/synapse/issues/17238))
-- Fix errors in logs about closing incorrect logging contexts when media gets rejected by a module. ([\#17239](https://github.com/element-hq/synapse/issues/17239), [\#17246](https://github.com/element-hq/synapse/issues/17246))
-- Clean out invalid destinations from `device_federation_outbox` table. ([\#17242](https://github.com/element-hq/synapse/issues/17242))
-- Stop logging errors when receiving invalid User IDs in key querys requests. ([\#17250](https://github.com/element-hq/synapse/issues/17250))
-
-
-
-### Updates to locked dependencies
-
-* Bump anyhow from 1.0.83 to 1.0.86. ([\#17220](https://github.com/element-hq/synapse/issues/17220))
-* Bump bcrypt from 4.1.2 to 4.1.3. ([\#17224](https://github.com/element-hq/synapse/issues/17224))
-* Bump lxml from 5.2.1 to 5.2.2. ([\#17261](https://github.com/element-hq/synapse/issues/17261))
-* Bump mypy-zope from 1.0.3 to 1.0.4. ([\#17262](https://github.com/element-hq/synapse/issues/17262))
-* Bump phonenumbers from 8.13.35 to 8.13.37. ([\#17235](https://github.com/element-hq/synapse/issues/17235))
-* Bump prometheus-client from 0.19.0 to 0.20.0. ([\#17233](https://github.com/element-hq/synapse/issues/17233))
-* Bump pyasn1 from 0.5.1 to 0.6.0. ([\#17223](https://github.com/element-hq/synapse/issues/17223))
-* Bump pyicu from 2.13 to 2.13.1. ([\#17236](https://github.com/element-hq/synapse/issues/17236))
-* Bump pyopenssl from 24.0.0 to 24.1.0. ([\#17234](https://github.com/element-hq/synapse/issues/17234))
-* Bump serde from 1.0.201 to 1.0.202. ([\#17221](https://github.com/element-hq/synapse/issues/17221))
-* Bump serde from 1.0.202 to 1.0.203. ([\#17232](https://github.com/element-hq/synapse/issues/17232))
-* Bump twine from 5.0.0 to 5.1.0. ([\#17225](https://github.com/element-hq/synapse/issues/17225))
-* Bump types-psycopg2 from 2.9.21.20240311 to 2.9.21.20240417. ([\#17222](https://github.com/element-hq/synapse/issues/17222))
-* Bump types-pyopenssl from 24.0.0.20240311 to 24.1.0.20240425. ([\#17260](https://github.com/element-hq/synapse/issues/17260))
-
-# Synapse 1.108.0 (2024-05-28)
-
-No significant changes since 1.108.0rc1.
-
-
-
-
-# Synapse 1.108.0rc1 (2024-05-21)
-
-### Features
-
-- Add a feature that allows clients to query the configured federation whitelist. Disabled by default. ([\#16848](https://github.com/element-hq/synapse/issues/16848), [\#17199](https://github.com/element-hq/synapse/issues/17199))
-- Add the ability to allow numeric user IDs with a specific prefix when in the CAS flow. Contributed by Aurélien Grimpard. ([\#17098](https://github.com/element-hq/synapse/issues/17098))
-
-### Bugfixes
-
-- Fix bug where push rules would be empty in `/sync` for some accounts. Introduced in v1.93.0. ([\#17142](https://github.com/element-hq/synapse/issues/17142))
-- Add support for optional whitespace around the Federation API's `Authorization` header's parameter commas. ([\#17145](https://github.com/element-hq/synapse/issues/17145))
-- Fix bug where disabling room publication prevented public rooms being created on workers. ([\#17177](https://github.com/element-hq/synapse/issues/17177), [\#17184](https://github.com/element-hq/synapse/issues/17184))
-
-### Improved Documentation
-
-- Document [`/v1/make_knock`](https://spec.matrix.org/v1.10/server-server-api/#get_matrixfederationv1make_knockroomiduserid) and [`/v1/send_knock/`](https://spec.matrix.org/v1.10/server-server-api/#put_matrixfederationv1send_knockroomideventid) federation endpoints as worker-compatible. ([\#17058](https://github.com/element-hq/synapse/issues/17058))
-- Update User Admin API with note about prefixing OIDC external_id providers. ([\#17139](https://github.com/element-hq/synapse/issues/17139))
-- Clarify the state of the created room when using the `autocreate_auto_join_room_preset` config option. ([\#17150](https://github.com/element-hq/synapse/issues/17150))
-- Update the Admin FAQ with the current libjemalloc version for latest Debian stable. Additionally update the name of the "push_rules" stream in the Workers documentation. ([\#17171](https://github.com/element-hq/synapse/issues/17171))
-
-### Internal Changes
-
-- Add note to reflect that [MSC3886](https://github.com/matrix-org/matrix-spec-proposals/pull/3886) is closed but will remain supported for some time. ([\#17151](https://github.com/element-hq/synapse/issues/17151))
-- Update dependency PyO3 to 0.21. ([\#17162](https://github.com/element-hq/synapse/issues/17162))
-- Fixes linter errors found in PR #17147. ([\#17166](https://github.com/element-hq/synapse/issues/17166))
-- Bump black from 24.2.0 to 24.4.2. ([\#17170](https://github.com/element-hq/synapse/issues/17170))
-- Cache literal sync filter validation for performance. ([\#17186](https://github.com/element-hq/synapse/issues/17186))
-- Improve performance by fixing a reactor pause. ([\#17192](https://github.com/element-hq/synapse/issues/17192))
-- Route `/make_knock` and `/send_knock` federation APIs to the federation reader worker in Complement test runs. ([\#17195](https://github.com/element-hq/synapse/issues/17195))
-- Prepare sync handler to be able to return different sync responses (`SyncVersion`). ([\#17200](https://github.com/element-hq/synapse/issues/17200))
-- Organize the sync cache key parameter outside of the sync config (separate concerns). ([\#17201](https://github.com/element-hq/synapse/issues/17201))
-- Refactor `SyncResultBuilder` assembly to its own function. ([\#17202](https://github.com/element-hq/synapse/issues/17202))
-- Rename to be obvious: `joined_rooms` -> `joined_room_ids`. ([\#17203](https://github.com/element-hq/synapse/issues/17203), [\#17208](https://github.com/element-hq/synapse/issues/17208))
-- Add a short pause when rate-limiting a request. ([\#17210](https://github.com/element-hq/synapse/issues/17210))
-
-
-
-### Updates to locked dependencies
-
-* Bump cryptography from 42.0.5 to 42.0.7. ([\#17180](https://github.com/element-hq/synapse/issues/17180))
-* Bump gitpython from 3.1.41 to 3.1.43. ([\#17181](https://github.com/element-hq/synapse/issues/17181))
-* Bump immutabledict from 4.1.0 to 4.2.0. ([\#17179](https://github.com/element-hq/synapse/issues/17179))
-* Bump sentry-sdk from 1.40.3 to 2.1.1. ([\#17178](https://github.com/element-hq/synapse/issues/17178))
-* Bump serde from 1.0.200 to 1.0.201. ([\#17183](https://github.com/element-hq/synapse/issues/17183))
-* Bump serde_json from 1.0.116 to 1.0.117. ([\#17182](https://github.com/element-hq/synapse/issues/17182))
-
-Synapse 1.107.0 (2024-05-14)
-============================
-
-No significant changes since 1.107.0rc1.
-
-
-# Synapse 1.107.0rc1 (2024-05-07)
-
-### Features
-
-- Add preliminary support for [MSC3823: Account Suspension](https://github.com/matrix-org/matrix-spec-proposals/pull/3823). ([\#17051](https://github.com/element-hq/synapse/issues/17051))
-- Declare support for [Matrix v1.10](https://matrix.org/blog/2024/03/22/matrix-v1.10-release/). Contributed by @clokep. ([\#17082](https://github.com/element-hq/synapse/issues/17082))
-- Add support for [MSC4115: membership metadata on events](https://github.com/matrix-org/matrix-spec-proposals/pull/4115). ([\#17104](https://github.com/element-hq/synapse/issues/17104), [\#17137](https://github.com/element-hq/synapse/issues/17137))
-
-### Bugfixes
-
-- Fixed search feature of Element Android on homesevers using SQLite by returning search terms as search highlights. ([\#17000](https://github.com/element-hq/synapse/issues/17000))
-- Fixes a bug introduced in v1.52.0 where the `destination` query parameter for the  [Destination Rooms Admin API](https://element-hq.github.io/synapse/v1.105/usage/administration/admin_api/federation.html#destination-rooms) failed to actually filter returned rooms. ([\#17077](https://github.com/element-hq/synapse/issues/17077))
-- For MSC3266 room summaries, support queries at the recommended endpoint of `/_matrix/client/unstable/im.nheko.summary/summary/{roomIdOrAlias}`. The existing endpoint of `/_matrix/client/unstable/im.nheko.summary/rooms/{roomIdOrAlias}/summary` is deprecated. ([\#17078](https://github.com/element-hq/synapse/issues/17078))
-- Apply user email & picture during OIDC registration if present & selected. ([\#17120](https://github.com/element-hq/synapse/issues/17120))
-- Improve error message for cross signing reset with [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) enabled. ([\#17121](https://github.com/element-hq/synapse/issues/17121))
-- Fix a bug which meant that to-device messages received over federation could be dropped when the server was under load or networking problems caused problems between Synapse processes or the database. ([\#17127](https://github.com/element-hq/synapse/issues/17127))
-- Fix bug where `StreamChangeCache` would not respect configured cache factors. ([\#17152](https://github.com/element-hq/synapse/issues/17152))
+- Make sure we advertise registration as disabled when [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) is enabled. ([\#17661](https://github.com/element-hq/synapse/issues/17661))
+- Prevent suspended users from sending encrypted messages. ([\#18157](https://github.com/element-hq/synapse/issues/18157))
+- Cleanup deleted state group references. ([\#18165](https://github.com/element-hq/synapse/issues/18165))
+- Fix [MSC4108 QR-code login](https://github.com/matrix-org/matrix-spec-proposals/pull/4108) not working with some reverse-proxy setups. ([\#18178](https://github.com/element-hq/synapse/issues/18178))
+- Support device IDs that can't be represented in a scope when delegating auth to Matrix Authentication Service 0.15.0+. ([\#18174](https://github.com/element-hq/synapse/issues/18174))
 
 ### Updates to the Docker image
 
-- Correct licensing metadata on Docker image. ([\#17141](https://github.com/element-hq/synapse/issues/17141))
+- Speed up the building of the Docker image. ([\#18038](https://github.com/element-hq/synapse/issues/18038))
 
 ### Improved Documentation
 
-- Update the `event_cache_size` and `global_factor` configuration options' documentation. ([\#17071](https://github.com/element-hq/synapse/issues/17071))
-- Remove broken sphinx docs. ([\#17073](https://github.com/element-hq/synapse/issues/17073), [\#17148](https://github.com/element-hq/synapse/issues/17148))
-- Add RuntimeDirectory to example matrix-synapse.service systemd unit. ([\#17084](https://github.com/element-hq/synapse/issues/17084))
-- Fix various small typos throughout the docs. ([\#17114](https://github.com/element-hq/synapse/issues/17114))
-- Update enable_notifs configuration documentation. ([\#17116](https://github.com/element-hq/synapse/issues/17116))
-- Update the Upgrade Notes with the latest minimum supported Rust version of 1.66.0. Contributed by @jahway603. ([\#17140](https://github.com/element-hq/synapse/issues/17140))
-
-### Internal Changes
-
-- Enable [MSC3266](https://github.com/matrix-org/matrix-spec-proposals/pull/3266) by default in the Synapse Complement image. ([\#17105](https://github.com/element-hq/synapse/issues/17105))
-- Add optimisation to `StreamChangeCache.get_entities_changed(..)`. ([\#17130](https://github.com/element-hq/synapse/issues/17130))
+- Move incorrectly placed version indicator in User Event Redaction Admin API docs. ([\#18152](https://github.com/element-hq/synapse/issues/18152))
+- Document suspension Admin API. ([\#18162](https://github.com/element-hq/synapse/issues/18162))
 
+### Deprecations and Removals
 
+- Disable room list publication by default. ([\#18175](https://github.com/element-hq/synapse/issues/18175))
 
 ### Updates to locked dependencies
 
-* Bump furo from 2024.1.29 to 2024.4.27. ([\#17133](https://github.com/element-hq/synapse/issues/17133))
-* Bump idna from 3.6 to 3.7. ([\#17136](https://github.com/element-hq/synapse/issues/17136))
-* Bump jsonschema from 4.21.1 to 4.22.0. ([\#17157](https://github.com/element-hq/synapse/issues/17157))
-* Bump lxml from 5.1.0 to 5.2.1. ([\#17158](https://github.com/element-hq/synapse/issues/17158))
-* Bump phonenumbers from 8.13.29 to 8.13.35. ([\#17106](https://github.com/element-hq/synapse/issues/17106))
-- Bump pillow from 10.2.0 to 10.3.0. ([\#17146](https://github.com/element-hq/synapse/issues/17146))
-* Bump pydantic from 2.6.4 to 2.7.0. ([\#17107](https://github.com/element-hq/synapse/issues/17107))
-* Bump pydantic from 2.7.0 to 2.7.1. ([\#17160](https://github.com/element-hq/synapse/issues/17160))
-* Bump pyicu from 2.12 to 2.13. ([\#17109](https://github.com/element-hq/synapse/issues/17109))
-* Bump serde from 1.0.197 to 1.0.198. ([\#17111](https://github.com/element-hq/synapse/issues/17111))
-* Bump serde from 1.0.198 to 1.0.199. ([\#17132](https://github.com/element-hq/synapse/issues/17132))
-* Bump serde from 1.0.199 to 1.0.200. ([\#17161](https://github.com/element-hq/synapse/issues/17161))
-* Bump serde_json from 1.0.115 to 1.0.116. ([\#17112](https://github.com/element-hq/synapse/issues/17112))
-- Update `tornado` Python dependency from 6.2 to 6.4. ([\#17131](https://github.com/element-hq/synapse/issues/17131))
-* Bump twisted from 23.10.0 to 24.3.0. ([\#17135](https://github.com/element-hq/synapse/issues/17135))
-* Bump types-bleach from 6.1.0.1 to 6.1.0.20240331. ([\#17110](https://github.com/element-hq/synapse/issues/17110))
-* Bump types-pillow from 10.2.0.20240415 to 10.2.0.20240423. ([\#17159](https://github.com/element-hq/synapse/issues/17159))
-* Bump types-setuptools from 69.0.0.20240125 to 69.5.0.20240423. ([\#17134](https://github.com/element-hq/synapse/issues/17134))
-
-# Synapse 1.106.0 (2024-04-30)
-
-No significant changes since 1.106.0rc1.
+* Bump anyhow from 1.0.95 to 1.0.96. ([\#18187](https://github.com/element-hq/synapse/issues/18187))
+* Bump authlib from 1.4.0 to 1.4.1. ([\#18190](https://github.com/element-hq/synapse/issues/18190))
+* Bump click from 8.1.7 to 8.1.8. ([\#18189](https://github.com/element-hq/synapse/issues/18189))
+* Bump log from 0.4.25 to 0.4.26. ([\#18184](https://github.com/element-hq/synapse/issues/18184))
+* Bump pyo3-log from 0.12.0 to 0.12.1. ([\#18046](https://github.com/element-hq/synapse/issues/18046))
+* Bump serde from 1.0.217 to 1.0.218. ([\#18183](https://github.com/element-hq/synapse/issues/18183))
+* Bump serde_json from 1.0.138 to 1.0.139. ([\#18186](https://github.com/element-hq/synapse/issues/18186))
+* Bump sigstore/cosign-installer from 3.8.0 to 3.8.1. ([\#18185](https://github.com/element-hq/synapse/issues/18185))
+* Bump types-psycopg2 from 2.9.21.20241019 to 2.9.21.20250121. ([\#18188](https://github.com/element-hq/synapse/issues/18188))
 
 
+# Synapse 1.125.0 (2025-02-25)
+
+No significant changes since 1.125.0rc1.
 
 
-# Synapse 1.106.0rc1 (2024-04-25)
+# Synapse 1.125.0rc1 (2025-02-18)
 
 ### Features
 
-- Send an email if the address is already bound to an user account. ([\#16819](https://github.com/element-hq/synapse/issues/16819))
-- Implement the rendezvous mechanism described by [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/issues/4108). ([\#17056](https://github.com/element-hq/synapse/issues/17056))
-- Support delegating the rendezvous mechanism described [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/issues/4108) to an external implementation. ([\#17086](https://github.com/element-hq/synapse/issues/17086))
+- Add functionality to be able to use multiple values in SSO feature `attribute_requirements`. ([\#17949](https://github.com/element-hq/synapse/issues/17949))
+- Add experimental config options `admin_token_path` and `client_secret_path` for [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861). ([\#18004](https://github.com/element-hq/synapse/issues/18004))
+- Add `get_current_time_msec()` method to the [module API](https://matrix-org.github.io/synapse/latest/modules/writing_a_module.html) for sound time comparisons with Synapse. ([\#18144](https://github.com/element-hq/synapse/issues/18144))
 
 ### Bugfixes
 
-- Add validation to ensure that the `limit` parameter on `/publicRooms` is non-negative. ([\#16920](https://github.com/element-hq/synapse/issues/16920))
-- Return `400 M_NOT_JSON` upon receiving invalid JSON in query parameters across various client and admin endpoints, rather than an internal server error. ([\#16923](https://github.com/element-hq/synapse/issues/16923))
-- Make the CSAPI endpoint `/keys/device_signing/upload` idempotent. ([\#16943](https://github.com/element-hq/synapse/issues/16943))
-- Redact membership events if the user requested erasure upon deactivating. ([\#17076](https://github.com/element-hq/synapse/issues/17076))
-
-### Improved Documentation
-
-- Add a prompt in the contributing guide to manually configure icu4c. ([\#17069](https://github.com/element-hq/synapse/issues/17069))
-- Clarify what part of message retention is still experimental. ([\#17099](https://github.com/element-hq/synapse/issues/17099))
-
-### Internal Changes
-
-- Use new receipts column to optimise receipt and push action SQL queries. Contributed by Nick @ Beeper (@fizzadar). ([\#17032](https://github.com/element-hq/synapse/issues/17032), [\#17096](https://github.com/element-hq/synapse/issues/17096))
-- Fix mypy with latest Twisted release. ([\#17036](https://github.com/element-hq/synapse/issues/17036))
-- Bump minimum supported Rust version to 1.66.0. ([\#17079](https://github.com/element-hq/synapse/issues/17079))
-- Add helpers to transform Twisted requests to Rust http Requests/Responses. ([\#17081](https://github.com/element-hq/synapse/issues/17081))
-- Fix type annotation for `visited_chains` after `mypy` upgrade. ([\#17125](https://github.com/element-hq/synapse/issues/17125))
-
-
-
-### Updates to locked dependencies
-
-* Bump anyhow from 1.0.81 to 1.0.82. ([\#17095](https://github.com/element-hq/synapse/issues/17095))
-* Bump peaceiris/actions-gh-pages from 3.9.3 to 4.0.0. ([\#17087](https://github.com/element-hq/synapse/issues/17087))
-* Bump peaceiris/actions-mdbook from 1.2.0 to 2.0.0. ([\#17089](https://github.com/element-hq/synapse/issues/17089))
-* Bump pyasn1-modules from 0.3.0 to 0.4.0. ([\#17093](https://github.com/element-hq/synapse/issues/17093))
-* Bump pygithub from 2.2.0 to 2.3.0. ([\#17092](https://github.com/element-hq/synapse/issues/17092))
-* Bump ruff from 0.3.5 to 0.3.7. ([\#17094](https://github.com/element-hq/synapse/issues/17094))
-* Bump sigstore/cosign-installer from 3.4.0 to 3.5.0. ([\#17088](https://github.com/element-hq/synapse/issues/17088))
-* Bump twine from 4.0.2 to 5.0.0. ([\#17091](https://github.com/element-hq/synapse/issues/17091))
-* Bump types-pillow from 10.2.0.20240406 to 10.2.0.20240415. ([\#17090](https://github.com/element-hq/synapse/issues/17090))
-
-# Synapse 1.105.1 (2024-04-23)
-
-## Security advisory
-
-The following issues are fixed in 1.105.1.
-
-- [GHSA-3h7q-rfh9-xm4v](https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v) / [CVE-2024-31208](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-31208) — High Severity
-
-  Weakness in auth chain indexing allows DoS from remote room members through disk fill and high CPU usage.
-
-See the advisories for more details. If you have any questions, email security@element.io.
-
-
-
-# Synapse 1.105.0 (2024-04-16)
-
-No significant changes since 1.105.0rc1.
-
-
-
-
-# Synapse 1.105.0rc1 (2024-04-11)
-
-### Features
-
-- Stabilize support for [MSC4010](https://github.com/matrix-org/matrix-spec-proposals/pull/4010) which clarifies the interaction of push rules and account data. Contributed by @clokep. ([\#17022](https://github.com/element-hq/synapse/issues/17022))
-- Stabilize support for [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981): `/relations` recursion. Contributed by @clokep. ([\#17023](https://github.com/element-hq/synapse/issues/17023))
-- Add support for moving `/pushrules` off of main process. ([\#17037](https://github.com/element-hq/synapse/issues/17037), [\#17038](https://github.com/element-hq/synapse/issues/17038))
-
-### Bugfixes
-
-- Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations. ([\#16930](https://github.com/element-hq/synapse/issues/16930), [\#16932](https://github.com/element-hq/synapse/issues/16932), [\#16942](https://github.com/element-hq/synapse/issues/16942), [\#17064](https://github.com/element-hq/synapse/issues/17064), [\#17065](https://github.com/element-hq/synapse/issues/17065), [\#17066](https://github.com/element-hq/synapse/issues/17066))
-- Fix server notice rooms not always being created as unencrypted rooms, even when `encryption_enabled_by_default_for_room_type` is in use (server notices are always unencrypted). ([\#17033](https://github.com/element-hq/synapse/issues/17033))
-- Fix the `.m.rule.encrypted_room_one_to_one` and `.m.rule.room_one_to_one` default underride push rules being in the wrong order. Contributed by @Sumpy1. ([\#17043](https://github.com/element-hq/synapse/issues/17043))
-
-### Internal Changes
-
-- Refactor auth chain fetching to reduce duplication. ([\#17044](https://github.com/element-hq/synapse/issues/17044))
-- Improve database performance by adding a missing index to `access_tokens.refresh_token_id`. ([\#17045](https://github.com/element-hq/synapse/issues/17045), [\#17054](https://github.com/element-hq/synapse/issues/17054))
-- Improve database performance by reducing number of receipts fetched when sending push notifications. ([\#17049](https://github.com/element-hq/synapse/issues/17049))
-
-
-
-### Updates to locked dependencies
-
-* Bump packaging from 23.2 to 24.0. ([\#17027](https://github.com/element-hq/synapse/issues/17027))
-* Bump regex from 1.10.3 to 1.10.4. ([\#17028](https://github.com/element-hq/synapse/issues/17028))
-* Bump ruff from 0.3.2 to 0.3.5. ([\#17060](https://github.com/element-hq/synapse/issues/17060))
-* Bump serde_json from 1.0.114 to 1.0.115. ([\#17041](https://github.com/element-hq/synapse/issues/17041))
-* Bump types-pillow from 10.2.0.20240125 to 10.2.0.20240406. ([\#17061](https://github.com/element-hq/synapse/issues/17061))
-* Bump types-requests from 2.31.0.20240125 to 2.31.0.20240406. ([\#17063](https://github.com/element-hq/synapse/issues/17063))
-* Bump typing-extensions from 4.9.0 to 4.11.0. ([\#17062](https://github.com/element-hq/synapse/issues/17062))
-
-# Synapse 1.104.0 (2024-04-02)
-
-### Bugfixes
-
-- Fix regression when using OIDC provider. Introduced in v1.104.0rc1. ([\#17031](https://github.com/element-hq/synapse/issues/17031))
-
-
-# Synapse 1.104.0rc1 (2024-03-26)
-
-### Features
-
-- Add an OIDC config to specify extra parameters for the authorization grant URL. IT can be useful to pass an ACR value for example. ([\#16971](https://github.com/element-hq/synapse/issues/16971))
-- Add support for OIDC provider returning JWT. ([\#16972](https://github.com/element-hq/synapse/issues/16972), [\#17031](https://github.com/element-hq/synapse/issues/17031))
-
-### Bugfixes
-
-- Fix a bug which meant that, under certain circumstances, we might never retry sending events or to-device messages over federation after a failure. ([\#16925](https://github.com/element-hq/synapse/issues/16925))
-- Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations. ([\#16949](https://github.com/element-hq/synapse/issues/16949))
-- Fix case in which `m.fully_read` marker would not get updated. Contributed by @SpiritCroc. ([\#16990](https://github.com/element-hq/synapse/issues/16990))
-- Fix bug which did not retract a user's pending knocks at rooms when their account was deactivated. Contributed by @hanadi92. ([\#17010](https://github.com/element-hq/synapse/issues/17010))
+- Update the response when a client attempts to add an invalid email address to the user's account from a 500, to a 400 with error text. ([\#18125](https://github.com/element-hq/synapse/issues/18125))
+- Fix user directory search when using a legacy module with a `check_username_for_spam` callback. Broke in v1.122.0. ([\#18135](https://github.com/element-hq/synapse/issues/18135))
 
 ### Updates to the Docker image
 
-- Updated `start.py` to generate config using the correct user ID when running as root (fixes [\#16824](https://github.com/element-hq/synapse/issues/16824), [\#15202](https://github.com/element-hq/synapse/issues/15202)). ([\#16978](https://github.com/element-hq/synapse/issues/16978))
+- Add `SYNAPSE_HTTP_PROXY`/`SYNAPSE_HTTPS_PROXY`/`SYNAPSE_NO_PROXY` environment variables to pass through specifically to the Synapse process (instead of needing to apply [`http_proxy`/`https_proxy`/`no_proxy`](https://element-hq.github.io/synapse/latest/setup/forward_proxy.html) globally). ([\#18158](https://github.com/element-hq/synapse/issues/18158))
 
 ### Improved Documentation
 
-- Add a query to force a refresh of a remote user's device list to the "Useful SQL for Admins" documentation page. ([\#16892](https://github.com/element-hq/synapse/issues/16892))
-- Minor grammatical corrections to the upgrade documentation. ([\#16965](https://github.com/element-hq/synapse/issues/16965))
-- Fix the sort order for the documentation version picker, so that newer releases appear above older ones. ([\#16966](https://github.com/element-hq/synapse/issues/16966))
-- Remove recommendation for a specific poetry version from contributing guide. ([\#17002](https://github.com/element-hq/synapse/issues/17002))
+- Add Oracle Linux 8 and 9 installation instructions. ([\#17436](https://github.com/element-hq/synapse/issues/17436))
+- Document missing server config options (`daemonize`, `print_pidfile`, `user_agent_suffix`, `use_frozen_dicts`, `manhole`). ([\#18122](https://github.com/element-hq/synapse/issues/18122))
+- Document consequences of replacing secrets. ([\#18138](https://github.com/element-hq/synapse/issues/18138))
+- Make `burst_count` field an integer in `rc_presence` config documentation example. ([\#18159](https://github.com/element-hq/synapse/issues/18159))
 
 ### Internal Changes
 
-- Improve lock performance when a lot of locks are all waiting for a single lock to be released. ([\#16840](https://github.com/element-hq/synapse/issues/16840))
-- Update power level default for public rooms. ([\#16907](https://github.com/element-hq/synapse/issues/16907))
-- Improve event validation. ([\#16908](https://github.com/element-hq/synapse/issues/16908))
-- Multi-worker-docker-container: disable log buffering. ([\#16919](https://github.com/element-hq/synapse/issues/16919))
-- Refactor state delta calculation in `/sync` handler. ([\#16929](https://github.com/element-hq/synapse/issues/16929))
-- Clarify docs for some room state functions. ([\#16950](https://github.com/element-hq/synapse/issues/16950))
-- Specify IP subnets in canonical form. ([\#16953](https://github.com/element-hq/synapse/issues/16953))
-- As done for SAML mapping provider, let's pass the module API to the OIDC one so the mapper can do more logic in its code. ([\#16974](https://github.com/element-hq/synapse/issues/16974))
-- Allow containers building on top of Synapse's Complement container is use the included PostgreSQL cluster. ([\#16985](https://github.com/element-hq/synapse/issues/16985))
-- Raise poetry-core version cap to 1.9.0. ([\#16986](https://github.com/element-hq/synapse/issues/16986))
-- Patch the db conn pool sooner in tests. ([\#17017](https://github.com/element-hq/synapse/issues/17017))
+- Overload `DatabasePool.simple_select_one_txn` to return non-`None` when the `allow_none` parameter is `False`. ([\#17616](https://github.com/element-hq/synapse/issues/17616))
+- Python 3.8 EOL: compile native extensions with the 3.9 ABI and use typing hints from the standard library. ([\#17967](https://github.com/element-hq/synapse/issues/17967))
+- Add log message when worker lock timeouts get large. ([\#18124](https://github.com/element-hq/synapse/issues/18124))
+- Make it explicit that you can buy an AGPL-alternative commercial license from Element. ([\#18134](https://github.com/element-hq/synapse/issues/18134))
+- Fix the 'Fix linting' GitHub Actions workflow. ([\#18136](https://github.com/element-hq/synapse/issues/18136))
+- Do not log at the exception-level when clients provide empty `since` token to `/sync` API. ([\#18139](https://github.com/element-hq/synapse/issues/18139))
+- Reduce database load of user search when using large search terms. ([\#18172](https://github.com/element-hq/synapse/issues/18172))
 
 
 
 ### Updates to locked dependencies
 
-* Bump anyhow from 1.0.80 to 1.0.81. ([\#17009](https://github.com/element-hq/synapse/issues/17009))
-* Bump black from 23.10.1 to 24.2.0. ([\#16936](https://github.com/element-hq/synapse/issues/16936))
-* Bump cryptography from 41.0.7 to 42.0.5. ([\#16958](https://github.com/element-hq/synapse/issues/16958))
-* Bump dawidd6/action-download-artifact from 3.1.1 to 3.1.2. ([\#16960](https://github.com/element-hq/synapse/issues/16960))
-* Bump dawidd6/action-download-artifact from 3.1.2 to 3.1.4. ([\#17008](https://github.com/element-hq/synapse/issues/17008))
-* Bump jinja2 from 3.1.2 to 3.1.3. ([\#17005](https://github.com/element-hq/synapse/issues/17005))
-* Bump log from 0.4.20 to 0.4.21. ([\#16977](https://github.com/element-hq/synapse/issues/16977))
-* Bump mypy from 1.5.1 to 1.8.0. ([\#16901](https://github.com/element-hq/synapse/issues/16901))
-* Bump netaddr from 0.9.0 to 1.2.1. ([\#17006](https://github.com/element-hq/synapse/issues/17006))
-* Bump pydantic from 2.6.0 to 2.6.4. ([\#17004](https://github.com/element-hq/synapse/issues/17004))
-* Bump pyo3 from 0.20.2 to 0.20.3. ([\#16962](https://github.com/element-hq/synapse/issues/16962))
-* Bump ruff from 0.1.14 to 0.3.2. ([\#16994](https://github.com/element-hq/synapse/issues/16994))
-* Bump serde from 1.0.196 to 1.0.197. ([\#16963](https://github.com/element-hq/synapse/issues/16963))
-* Bump serde_json from 1.0.113 to 1.0.114. ([\#16961](https://github.com/element-hq/synapse/issues/16961))
-* Bump types-jsonschema from 4.21.0.20240118 to 4.21.0.20240311. ([\#17007](https://github.com/element-hq/synapse/issues/17007))
-* Bump types-psycopg2 from 2.9.21.16 to 2.9.21.20240311. ([\#16995](https://github.com/element-hq/synapse/issues/16995))
-* Bump types-pyopenssl from 23.3.0.0 to 24.0.0.20240311. ([\#17003](https://github.com/element-hq/synapse/issues/17003))
+* Bump bcrypt from 4.2.0 to 4.2.1. ([\#18127](https://github.com/element-hq/synapse/issues/18127))
+* Bump bytes from 1.9.0 to 1.10.0. ([\#18149](https://github.com/element-hq/synapse/issues/18149))
+* Bump gitpython from 3.1.43 to 3.1.44. ([\#18128](https://github.com/element-hq/synapse/issues/18128))
+* Bump hiredis from 3.0.0 to 3.1.0. ([\#18169](https://github.com/element-hq/synapse/issues/18169))
+* Bump serde_json from 1.0.137 to 1.0.138. ([\#18129](https://github.com/element-hq/synapse/issues/18129))
+* Bump service-identity from 24.1.0 to 24.2.0. ([\#18171](https://github.com/element-hq/synapse/issues/18171))
+* Bump sigstore/cosign-installer from 3.7.0 to 3.8.0. ([\#18147](https://github.com/element-hq/synapse/issues/18147))
+* Bump twine from 6.0.1 to 6.1.0. ([\#18170](https://github.com/element-hq/synapse/issues/18170))
+* Bump types-pyyaml from 6.0.12.20240917 to 6.0.12.20241230. ([\#18097](https://github.com/element-hq/synapse/issues/18097))
+* Bump ulid from 1.1.4 to 1.2.0. ([\#18148](https://github.com/element-hq/synapse/issues/18148))
 
-# Synapse 1.103.0 (2024-03-19)
+# Synapse 1.124.0 (2025-02-11)
 
-No significant changes since 1.103.0rc1.
+No significant changes since 1.124.0rc3.
 
 
 
 
-# Synapse 1.103.0rc1 (2024-03-12)
+# Synapse 1.124.0rc3 (2025-02-07)
+
+### Bugfixes
+
+- Fix regression in performance of sending events due to superfluous reads and locks. Introduced in v1.124.0rc1. ([\#18141](https://github.com/element-hq/synapse/issues/18141))
+
+
+
+
+# Synapse 1.124.0rc2 (2025-02-05)
+
+### Bugfixes
+
+- Fix regression where persisting events in some rooms could fail after a previous unclean shutdown. Introduced in v1.124.0rc1. ([\#18137](https://github.com/element-hq/synapse/issues/18137))
+
+
+
+
+# Synapse 1.124.0rc1 (2025-02-04)
+
+### Bugfixes
+
+- Add rate limit `rc_presence.per_user`. This prevents load from excessive presence updates sent by clients via sync api. Also rate limit `/_matrix/client/v3/presence` as per the spec. Contributed by @rda0. ([\#18000](https://github.com/element-hq/synapse/issues/18000))
+- Deactivated users will no longer automatically accept an invite when `auto_accept_invites` is enabled. ([\#18073](https://github.com/element-hq/synapse/issues/18073))
+- Fix join being denied after being invited over federation. Also fixes other out-of-band membership transitions. ([\#18075](https://github.com/element-hq/synapse/issues/18075))
+- Updates contributed `docker-compose.yml` file to PostgreSQL v15, as v12 is no longer supported by Synapse.
+  Contributed by @maxkratz. ([\#18089](https://github.com/element-hq/synapse/issues/18089))
+- Fix rare edge case where state groups could be deleted while we are persisting new events that reference them. ([\#18107](https://github.com/element-hq/synapse/issues/18107), [\#18130](https://github.com/element-hq/synapse/issues/18130), [\#18131](https://github.com/element-hq/synapse/issues/18131))
+- Raise an error if someone is using an incorrect suffix in a config duration string. ([\#18112](https://github.com/element-hq/synapse/issues/18112))
+- Fix a bug where the [Delete Room Admin API](https://element-hq.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version) would fail if the `block` parameter was set to `true` and a worker other than the main process was configured to handle background tasks. ([\#18119](https://github.com/element-hq/synapse/issues/18119))
+
+### Internal Changes
+
+- Increase the length of the generated `nonce` parameter when perfoming OIDC logins to comply with the TI-Messenger spec. ([\#18109](https://github.com/element-hq/synapse/issues/18109))
+
+
+
+### Updates to locked dependencies
+
+* Bump dawidd6/action-download-artifact from 7 to 8. ([\#18108](https://github.com/element-hq/synapse/issues/18108))
+* Bump log from 0.4.22 to 0.4.25. ([\#18098](https://github.com/element-hq/synapse/issues/18098))
+* Bump python-multipart from 0.0.18 to 0.0.20. ([\#18096](https://github.com/element-hq/synapse/issues/18096))
+* Bump serde_json from 1.0.135 to 1.0.137. ([\#18099](https://github.com/element-hq/synapse/issues/18099))
+* Bump types-bleach from 6.1.0.20240331 to 6.2.0.20241123. ([\#18082](https://github.com/element-hq/synapse/issues/18082))
+
+# Synapse 1.123.0 (2025-01-28)
+
+No significant changes since 1.123.0rc1.
+
+
+
+
+# Synapse 1.123.0rc1 (2025-01-21)
 
 ### Features
 
-- Add a new [List Accounts v3](https://element-hq.github.io/synapse/v1.103/admin_api/user_admin_api.html#list-accounts-v3) Admin API with improved deactivated user filtering capabilities. ([\#16874](https://github.com/element-hq/synapse/issues/16874))
-- Include `Retry-After` header by default per [MSC4041](https://github.com/matrix-org/matrix-spec-proposals/pull/4041). Contributed by @clokep. ([\#16947](https://github.com/element-hq/synapse/issues/16947))
+- Implement [MSC4133](https://github.com/matrix-org/matrix-spec-proposals/pull/4133) for custom profile fields. Contributed by @clokep. ([\#17488](https://github.com/element-hq/synapse/issues/17488))
+- Add a query parameter `type` to the [Room State Admin API](https://element-hq.github.io/synapse/develop/admin_api/rooms.html#room-state-api) that filters the state event. ([\#18035](https://github.com/element-hq/synapse/issues/18035))
+- Support the new `/auth_metadata` endpoint defined in [MSC2965](https://github.com/matrix-org/matrix-spec-proposals/pull/2965). ([\#18093](https://github.com/element-hq/synapse/issues/18093))
 
 ### Bugfixes
 
-- Fix joining remote rooms when a module uses the `on_new_event` callback. This callback may now pass partial state events instead of the full state for remote rooms. Introduced in v1.76.0. ([\#16973](https://github.com/element-hq/synapse/issues/16973))
-- Fix performance issue when joining very large rooms that can cause the server to lock up. Introduced in v1.100.0. Contributed by @ggogel. ([\#16968](https://github.com/element-hq/synapse/issues/16968))
+- Fix membership caches not updating in state reset scenarios. ([\#17732](https://github.com/element-hq/synapse/issues/17732))
+- Fix rare race where on upgrade to v1.122.0 a long running database upgrade could lock out new events from being received or sent. ([\#18091](https://github.com/element-hq/synapse/issues/18091))
 
 ### Improved Documentation
 
-- Add HAProxy example for single port operation to reverse proxy documentation. Contributed by Georg Pfuetzenreuter (@tacerus). ([\#16768](https://github.com/element-hq/synapse/issues/16768))
-- Improve the documentation around running Complement tests with new configuration parameters. ([\#16946](https://github.com/element-hq/synapse/issues/16946))
-- Add docs on upgrading from a very old version. ([\#16951](https://github.com/element-hq/synapse/issues/16951))
-
-
-### Updates to locked dependencies
-
-* Bump JasonEtco/create-an-issue from 2.9.1 to 2.9.2. ([\#16934](https://github.com/element-hq/synapse/issues/16934))
-* Bump anyhow from 1.0.79 to 1.0.80. ([\#16935](https://github.com/element-hq/synapse/issues/16935))
-* Bump dawidd6/action-download-artifact from 3.0.0 to 3.1.1. ([\#16933](https://github.com/element-hq/synapse/issues/16933))
-* Bump furo from 2023.9.10 to 2024.1.29. ([\#16939](https://github.com/element-hq/synapse/issues/16939))
-* Bump pyopenssl from 23.3.0 to 24.0.0. ([\#16937](https://github.com/element-hq/synapse/issues/16937))
-* Bump types-netaddr from 0.10.0.20240106 to 1.2.0.20240219. ([\#16938](https://github.com/element-hq/synapse/issues/16938))
-
-
-# Synapse 1.102.0 (2024-03-05)
-
-### Bugfixes
-
-- Revert https://github.com/element-hq/synapse/pull/16756, which caused incorrect notification counts on mobile clients since v1.100.0. ([\#16979](https://github.com/element-hq/synapse/issues/16979))
-
-
-# Synapse 1.102.0rc1 (2024-02-20)
-
-### Features
-
-- A metric was added for emails sent by Synapse, broken down by type: `synapse_emails_sent_total`. Contributed by Remi Rampin. ([\#16881](https://github.com/element-hq/synapse/issues/16881))
-
-### Bugfixes
-
-- Do not send multiple concurrent requests for keys for the same server. ([\#16894](https://github.com/element-hq/synapse/issues/16894))
-- Fix performance issue when joining very large rooms that can cause the server to lock up. Introduced in v1.100.0. ([\#16903](https://github.com/element-hq/synapse/issues/16903))
-- Always prefer unthreaded receipt when >1 exist ([MSC4102](https://github.com/matrix-org/matrix-spec-proposals/pull/4102)). ([\#16927](https://github.com/element-hq/synapse/issues/16927))
-
-### Improved Documentation
-
-- Fix a small typo in the Rooms section of the Admin API documentation. Contributed by @RainerZufall187. ([\#16857](https://github.com/element-hq/synapse/issues/16857))
-
-### Internal Changes
-
-- Don't invalidate the entire event cache when we purge history. ([\#16905](https://github.com/element-hq/synapse/issues/16905))
-- Add experimental config option to not send device list updates for specific users. ([\#16909](https://github.com/element-hq/synapse/issues/16909))
-- Fix incorrect docker hub link in release script. ([\#16910](https://github.com/element-hq/synapse/issues/16910))
-
-
-
-### Updates to locked dependencies
-
-* Bump attrs from 23.1.0 to 23.2.0. ([\#16899](https://github.com/element-hq/synapse/issues/16899))
-* Bump bcrypt from 4.0.1 to 4.1.2. ([\#16900](https://github.com/element-hq/synapse/issues/16900))
-* Bump pygithub from 2.1.1 to 2.2.0. ([\#16902](https://github.com/element-hq/synapse/issues/16902))
-* Bump sentry-sdk from 1.40.0 to 1.40.3. ([\#16898](https://github.com/element-hq/synapse/issues/16898))
-
-# Synapse 1.101.0 (2024-02-13)
-
-### Bugfixes
-
-- Fix performance regression when fetching auth chains from the DB. Introduced in v1.100.0. ([\#16893](https://github.com/element-hq/synapse/issues/16893))
-
-
-
-
-# Synapse 1.101.0rc1 (2024-02-06)
-
-### Improved Documentation
-
-- Fix broken links in the documentation. ([\#16853](https://github.com/element-hq/synapse/issues/16853))
-- Update MacOS installation instructions to mention that libicu is optional. ([\#16854](https://github.com/element-hq/synapse/issues/16854))
-- The version picker now correctly lists versions after `v1.98.0`. ([\#16880](https://github.com/element-hq/synapse/issues/16880))
-
-### Internal Changes
-
-- Add support for stabilised [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981) that adds a `recurse` parameter on the `/relations` API. ([\#16842](https://github.com/element-hq/synapse/issues/16842))
-
-
-
-### Updates to locked dependencies
-
-* Bump dorny/paths-filter from 2 to 3. ([\#16869](https://github.com/element-hq/synapse/issues/16869))
-* Bump gitpython from 3.1.40 to 3.1.41. ([\#16850](https://github.com/element-hq/synapse/issues/16850))
-* Bump hiredis from 2.2.3 to 2.3.2. ([\#16862](https://github.com/element-hq/synapse/issues/16862))
-* Bump jsonschema from 4.20.0 to 4.21.1. ([\#16887](https://github.com/element-hq/synapse/issues/16887))
-* Bump lxml-stubs from 0.4.0 to 0.5.1. ([\#16885](https://github.com/element-hq/synapse/issues/16885))
-* Bump mypy-zope from 1.0.1 to 1.0.3. ([\#16865](https://github.com/element-hq/synapse/issues/16865))
-* Bump phonenumbers from 8.13.26 to 8.13.29. ([\#16868](https://github.com/element-hq/synapse/issues/16868))
-* Bump pydantic from 2.5.3 to 2.6.0. ([\#16888](https://github.com/element-hq/synapse/issues/16888))
-* Bump sentry-sdk from 1.39.1 to 1.40.0. ([\#16889](https://github.com/element-hq/synapse/issues/16889))
-* Bump serde from 1.0.195 to 1.0.196. ([\#16867](https://github.com/element-hq/synapse/issues/16867))
-* Bump serde_json from 1.0.111 to 1.0.113. ([\#16866](https://github.com/element-hq/synapse/issues/16866))
-* Bump sigstore/cosign-installer from 3.3.0 to 3.4.0. ([\#16890](https://github.com/element-hq/synapse/issues/16890))
-* Bump types-pillow from 10.1.0.2 to 10.2.0.20240125. ([\#16864](https://github.com/element-hq/synapse/issues/16864))
-* Bump types-requests from 2.31.0.10 to 2.31.0.20240125. ([\#16886](https://github.com/element-hq/synapse/issues/16886))
-* Bump types-setuptools from 69.0.0.0 to 69.0.0.20240125. ([\#16863](https://github.com/element-hq/synapse/issues/16863))
-
-# Synapse 1.100.0 (2024-01-30)
-
-No significant changes since 1.100.0rc3.
-
-
-
-
-# Synapse 1.100.0rc3 (2024-01-24)
-
-### Bugfixes
-
-- Fix database performance regression due to changing Postgres table statistics. Introduced in v1.100.0rc1. ([\#16849](https://github.com/element-hq/synapse/issues/16849))
-
-
-
-
-# Synapse 1.100.0rc2 (2024-01-24)
-
-This version is the same as 1.100.0rc1 but with fixes to the release process.
-
-### Internal Changes
-
-- Downgrade the `download-artifact` and `upload-artifact` actions to v3 due to breaking changes. ([\#16847](https://github.com/element-hq/synapse/issues/16847))
-
-
-# Synapse 1.100.0rc1 (2024-01-23)
-
-*This version was never released to PyPI or the Debian repository due to failures in the automatic part of the release process.*
-
-### Features
-
-- Advertise experimental support for [MSC4028](https://github.com/matrix-org/matrix-spec-proposals/pull/4028) through `/_matrix/clients/versions` if enabled. Contributed by @hanadi92. ([\#16787](https://github.com/element-hq/synapse/issues/16787))
-
-### Bugfixes
-
-- Handle wildcard type filters properly for room messages endpoint. Contributed by Mo Balaa. ([\#14984](https://github.com/element-hq/synapse/issues/14984))
-
-### Improved Documentation
-
-- Add a link to the "Request log format" explainer on the "Logging sample config" documentation page. ([\#16778](https://github.com/element-hq/synapse/issues/16778))
-- Fix broken links in issue templates and documentation. ([\#16810](https://github.com/element-hq/synapse/issues/16810))
-- NGINX listen http2 deprecation in documentation template for reverse proxy. ([\#16831](https://github.com/element-hq/synapse/issues/16831))
-
-### Internal Changes
-
-- Faster partial join to room with complex auth graph. ([\#7](https://github.com/element-hq/synapse/issues/7))
-- Improve DB performance of calculating badge counts for push. ([\#16756](https://github.com/element-hq/synapse/issues/16756))
-- Split up deleting devices into batches. ([\#16766](https://github.com/element-hq/synapse/issues/16766))
-- Remove CI check for sign-off as we require a CLA signature instead. ([\#16776](https://github.com/element-hq/synapse/issues/16776))
-- Ensure CI fails when linting fails to make sure auto-merge does the correct thing. ([\#16781](https://github.com/element-hq/synapse/issues/16781))
-- Faster load recents for sync by reducing amount of state pulled out. ([\#16783](https://github.com/element-hq/synapse/issues/16783))
-- Reduce amount of state pulled out when querying federation hierachy. ([\#16785](https://github.com/element-hq/synapse/issues/16785))
-- Pull less state out of the DB when we retry fetching old events during backfill. ([\#16788](https://github.com/element-hq/synapse/issues/16788))
-- Optimize query for fetching to-device messages in `/sync`. ([\#16805](https://github.com/element-hq/synapse/issues/16805))
-- Reject OIDC config when `client_secret` isn't specified, but the auth method requires one. ([\#16806](https://github.com/element-hq/synapse/issues/16806))
-- Allow room creation but not publishing to continue if room publication rules are violated when creating
-  a new room. ([\#16811](https://github.com/element-hq/synapse/issues/16811))
-- Bump minimum supported Rust version to 1.65.0. ([\#16818](https://github.com/element-hq/synapse/issues/16818))
-- Fixup copyright lines in file headers after the licensing change. ([\#16820](https://github.com/element-hq/synapse/issues/16820))
-- Add a `--generate-only` option to the internal configuration/launch script for Complement. ([\#16828](https://github.com/element-hq/synapse/issues/16828))
-- Preparatory work for tweaking performance of auth chain lookups. ([\#16833](https://github.com/element-hq/synapse/issues/16833))
-- Speed up e2e device keys queries for bot accounts. ([\#16841](https://github.com/element-hq/synapse/issues/16841))
-
-### Updates to locked dependencies
-
-* Bump actions/cache from 3 to 4. ([\#16832](https://github.com/element-hq/synapse/issues/16832))
-* Bump actions/download-artifact from 3 to 4. ([\#16795](https://github.com/element-hq/synapse/issues/16795))
-* Bump actions/upload-artifact from 3 to 4. ([\#16796](https://github.com/element-hq/synapse/issues/16796))
-* Bump anyhow from 1.0.75 to 1.0.79. ([\#16789](https://github.com/element-hq/synapse/issues/16789))
-* Bump authlib from 1.2.1 to 1.3.0. ([\#16801](https://github.com/element-hq/synapse/issues/16801))
-* Bump dawidd6/action-download-artifact from 2.28.0 to 3.0.0. ([\#16794](https://github.com/element-hq/synapse/issues/16794))
-* Bump immutabledict from 4.0.0 to 4.1.0. ([\#16812](https://github.com/element-hq/synapse/issues/16812))
-* Bump isort from 5.13.1 to 5.13.2. ([\#16835](https://github.com/element-hq/synapse/issues/16835))
-* Bump lxml from 4.9.3 to 5.1.0. ([\#16813](https://github.com/element-hq/synapse/issues/16813))
-* Bump pillow from 10.1.0 to 10.2.0. ([\#16802](https://github.com/element-hq/synapse/issues/16802))
-* Bump pydantic from 2.5.2 to 2.5.3. ([\#16836](https://github.com/element-hq/synapse/issues/16836))
-* Bump pyo3 from 0.20.0 to 0.20.2. ([\#16791](https://github.com/element-hq/synapse/issues/16791))
-* Bump regex from 1.9.6 to 1.10.3. ([\#16837](https://github.com/element-hq/synapse/issues/16837))
-* Bump ruff from 0.1.13 to 0.1.14. ([\#16838](https://github.com/element-hq/synapse/issues/16838))
-* Bump ruff from 0.1.7 to 0.1.13. ([\#16814](https://github.com/element-hq/synapse/issues/16814))
-* Bump sentry-sdk from 1.35.0 to 1.39.1. ([\#16799](https://github.com/element-hq/synapse/issues/16799))
-* Bump serde_json from 1.0.108 to 1.0.111. ([\#16792](https://github.com/element-hq/synapse/issues/16792))
-* Bump service-identity from 23.1.0 to 24.1.0. ([\#16816](https://github.com/element-hq/synapse/issues/16816))
-* Bump types-commonmark from 0.9.2.4 to 0.9.2.20240106. ([\#16797](https://github.com/element-hq/synapse/issues/16797))
-* Bump types-jsonschema from 4.20.0.0 to 4.20.0.20240105. ([\#16800](https://github.com/element-hq/synapse/issues/16800))
-* Bump types-jsonschema from 4.20.0.20240105 to 4.21.0.20240118. ([\#16834](https://github.com/element-hq/synapse/issues/16834))
-* Bump types-netaddr from 0.9.0.1 to 0.10.0.20240106. ([\#16839](https://github.com/element-hq/synapse/issues/16839))
-* Bump typing-extensions from 4.8.0 to 4.9.0. ([\#16815](https://github.com/element-hq/synapse/issues/16815))
-
-
-# Synapse 1.99.0 (2024-01-16)
-
-Synapse 1.99.0 is the first Synapse release under an AGPLv3.0 licence (with CLA to enable Element to sell AGPL
-exceptions). You can read more about this here:
-
- - https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
- - https://element.io/blog/element-to-adopt-agplv3/
- - https://element.io/blog/synapse-now-lives-at-github-com-element-hq-synapse/
-
-No significant changes since 1.99.0rc1.
-
-
-# Synapse 1.99.0rc1 (2024-01-09)
-
-### Features
-
-- Add [config options](https://element-hq.github.io/synapse/v1.99/usage/configuration/config_documentation.html#server_notices) to set the avatar and the topic of the server notices room, as well as the avatar of the server notices user. ([\#16679](https://github.com/matrix-org/synapse/issues/16679))
-- Add config option [`email.notif_delay_before_mail`](https://element-hq.github.io/synapse/v1.99/usage/configuration/config_documentation.html#email) to tweak the delay before an email is sent following a notification. ([\#16696](https://github.com/matrix-org/synapse/issues/16696))
-- Add new configuration option [`sentry.environment`](https://element-hq.github.io/synapse/v1.99/usage/configuration/config_documentation.html#sentry) for improved system monitoring. Contributed by @zeeshanrafiqrana. ([\#16738](https://github.com/matrix-org/synapse/issues/16738))
-- Filter out rooms from the room directory being served to other homeservers when those rooms block that homeserver by their Access Control Lists. ([\#16759](https://github.com/element-hq/synapse/issues/16759))
-
-### Bugfixes
-
-- Fix a long-standing bug where the signing keys generated by Synapse were world-readable. Contributed by Fabian Klemp. ([\#16740](https://github.com/matrix-org/synapse/issues/16740))
-- Fix email verification redirection. Contributed by Fadhlan Ridhwanallah. ([\#16761](https://github.com/element-hq/synapse/issues/16761))
-- Fixed a bug that prevented users from being queried by display name if it contains non-ASCII characters. ([\#16767](https://github.com/element-hq/synapse/issues/16767))
-- Allow reactivate user without password with Admin API in some edge cases. ([\#16770](https://github.com/element-hq/synapse/issues/16770))
-- Adds the `recursion_depth` parameter to the response of the /relations endpoint if MSC3981 recursion is being performed. ([\#16775](https://github.com/element-hq/synapse/issues/16775))
-
-### Improved Documentation
-
-- Added version picker for Synapse documentation. Contributed by @Dmytro27Ind. ([\#16533](https://github.com/matrix-org/synapse/issues/16533))
-- Clarify that `password_config.enabled: "only_for_reauth"` does not allow new logins to be created using password auth. ([\#16737](https://github.com/matrix-org/synapse/issues/16737))
-- Remove value from header in configuration documentation for `refresh_token_lifetime`. ([\#16763](https://github.com/element-hq/synapse/issues/16763))
-- Add another custom statistics collection server to the documentation. Contributed by @loelkes. ([\#16769](https://github.com/element-hq/synapse/issues/16769))
-
-### Internal Changes
-
-- Remove run-once workflow after adding the version picker to the documentation. ([\#9453](https://github.com/element-hq/synapse/issues/9453))
-- Update the implementation of [MSC2965](https://github.com/matrix-org/matrix-spec-proposals/pull/2965) (OIDC Provider discovery). ([\#16726](https://github.com/matrix-org/synapse/issues/16726))
-- Move the rust stubs inline for better IDE integration. ([\#16757](https://github.com/element-hq/synapse/issues/16757))
-- Fix sample config doc CI. ([\#16758](https://github.com/element-hq/synapse/issues/16758))
-- Simplify event internal metadata class. ([\#16762](https://github.com/element-hq/synapse/issues/16762), [\#16780](https://github.com/element-hq/synapse/issues/16780))
-- Sign the published docker image using [cosign](https://docs.sigstore.dev/). ([\#16774](https://github.com/element-hq/synapse/issues/16774))
-- Port `EventInternalMetadata` class to Rust. ([\#16782](https://github.com/element-hq/synapse/issues/16782))
-
-
-
-### Updates to locked dependencies
-
-* Bump actions/setup-go from 4 to 5. ([\#16749](https://github.com/matrix-org/synapse/issues/16749))
-* Bump actions/setup-python from 4 to 5. ([\#16748](https://github.com/matrix-org/synapse/issues/16748))
-* Bump immutabledict from 3.0.0 to 4.0.0. ([\#16743](https://github.com/matrix-org/synapse/issues/16743))
-* Bump isort from 5.12.0 to 5.13.0. ([\#16745](https://github.com/matrix-org/synapse/issues/16745))
-* Bump isort from 5.13.0 to 5.13.1. ([\#16752](https://github.com/matrix-org/synapse/issues/16752))
-* Bump pydantic from 2.5.1 to 2.5.2. ([\#16747](https://github.com/matrix-org/synapse/issues/16747))
-* Bump ruff from 0.1.6 to 0.1.7. ([\#16746](https://github.com/matrix-org/synapse/issues/16746))
-* Bump types-setuptools from 68.2.0.2 to 69.0.0.0. ([\#16744](https://github.com/matrix-org/synapse/issues/16744))
-
-# Synapse 1.98.0 (2023-12-12)
-
-Synapse 1.98.0 will be the last Synapse release in 2023; the regular release cadence will resume in January 2024.
-
-Synapse will soon be forked by Element under an AGPLv3.0 licence (with CLA, for
-proprietary dual licensing). You can read more about this here:
-
- - https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
- - https://element.io/blog/element-to-adopt-agplv3/
-
-The Matrix.org Foundation copy of the project will be archived. Any changes needed
-by server administrators will be communicated via our usual announcements channels,
-but we are striving to make this as seamless as possible.
-
-
-No significant changes since 1.98.0rc1.
-
-
-
-# Synapse 1.98.0rc1 (2023-12-05)
-
-### Features
-
-- Synapse now declares support for Matrix v1.7, v1.8, and v1.9. ([\#16707](https://github.com/matrix-org/synapse/issues/16707))
-- Add `on_user_login` [module API](https://matrix-org.github.io/synapse/latest/modules/writing_a_module.html) callback for when a user logs in. ([\#15207](https://github.com/matrix-org/synapse/issues/15207))
-- Support [MSC4069: Inhibit profile propagation](https://github.com/matrix-org/matrix-spec-proposals/pull/4069). ([\#16636](https://github.com/matrix-org/synapse/issues/16636))
-- Restore tracking of requests and monthly active users when delegating authentication via [MSC3861](https://github.com/matrix-org/synapse/pull/16672) to an OIDC provider. ([\#16672](https://github.com/matrix-org/synapse/issues/16672))
-- Add an autojoin setting for server notices rooms, so users may be joined directly instead of receiving an invite. ([\#16699](https://github.com/matrix-org/synapse/issues/16699))
-- Follow redirects when downloading media over federation (per [MSC3860](https://github.com/matrix-org/matrix-spec-proposals/pull/3860)). ([\#16701](https://github.com/matrix-org/synapse/issues/16701))
-
-### Bugfixes
-
-- Enable refreshable tokens on the admin registration endpoint. ([\#16642](https://github.com/matrix-org/synapse/issues/16642))
-- Consistently bypass rate limits when using the server notice admin API. ([\#16670](https://github.com/matrix-org/synapse/issues/16670))
-- Fix a bug introduced in Synapse 1.7.2 where rooms whose power levels lacked an `events` field could not be upgraded. ([\#16725](https://github.com/matrix-org/synapse/issues/16725))
-- Fix `GET /_synapse/admin/v1/federation/destinations` [admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) returning null (instead of 0) for `retry_last_ts` and `retry_interval`. ([\#16729](https://github.com/matrix-org/synapse/issues/16729))
-
-### Improved Documentation
-
-- Add schema rollback information to documentation. ([\#16661](https://github.com/matrix-org/synapse/issues/16661))
-- Fix poetry version typo in the [contributors' guide](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html). ([\#16695](https://github.com/matrix-org/synapse/issues/16695))
-- Switch the example UNIX socket paths to `/run`. Add HAProxy example configuration for UNIX sockets. ([\#16700](https://github.com/matrix-org/synapse/issues/16700))
-- Add documentation for how to validate the configuration file with `synapse.config` script. ([\#16714](https://github.com/matrix-org/synapse/issues/16714))
-
-### Internal Changes
-
-- Clean-up unused tables. ([\#16522](https://github.com/matrix-org/synapse/issues/16522))
-- Reduce a little database load while processing state auth chains. ([\#16552](https://github.com/matrix-org/synapse/issues/16552))
-- Reduce database load of pruning old `user_ips`. ([\#16667](https://github.com/matrix-org/synapse/issues/16667))
-- Reduce DB load when forget on leave setting is disabled. ([\#16668](https://github.com/matrix-org/synapse/issues/16668))
-- Ignore `encryption_enabled_by_default_for_room_type` setting when creating server notices room, since the notices will be send unencrypted anyway. ([\#16677](https://github.com/matrix-org/synapse/issues/16677))
-- Correctly read the to-device stream ID on startup using SQLite. ([\#16682](https://github.com/matrix-org/synapse/issues/16682))
-- Reoranganise test files. ([\#16684](https://github.com/matrix-org/synapse/issues/16684))
-- Remove old full schema dumps which are no longer used. ([\#16697](https://github.com/matrix-org/synapse/issues/16697))
-- Raise poetry-core upper bound to <=1.8.1. This allows contributors to import Synapse after `poetry install`ing with Poetry 1.6 and above. Contributed by Mo Balaa. ([\#16702](https://github.com/matrix-org/synapse/issues/16702))
-- Add a workflow to try and automatically fixup linting in a PR. ([\#16704](https://github.com/matrix-org/synapse/issues/16704))
-
-
-### Updates to locked dependencies
-
-* Bump cryptography from 41.0.5 to 41.0.6. ([\#16703](https://github.com/matrix-org/synapse/issues/16703))
-* Bump cryptography from 41.0.6 to 41.0.7. ([\#16721](https://github.com/matrix-org/synapse/issues/16721))
-* Bump idna from 3.4 to 3.6. ([\#16720](https://github.com/matrix-org/synapse/issues/16720))
-* Bump jsonschema from 4.19.1 to 4.20.0. ([\#16692](https://github.com/matrix-org/synapse/issues/16692))
-* Bump matrix-org/netlify-pr-preview from 2 to 3. ([\#16719](https://github.com/matrix-org/synapse/issues/16719))
-* Bump phonenumbers from 8.13.23 to 8.13.26. ([\#16722](https://github.com/matrix-org/synapse/issues/16722))
-* Bump prometheus-client from 0.18.0 to 0.19.0. ([\#16691](https://github.com/matrix-org/synapse/issues/16691))
-* Bump pyasn1 from 0.5.0 to 0.5.1. ([\#16689](https://github.com/matrix-org/synapse/issues/16689))
-* Bump pydantic from 2.4.2 to 2.5.1. ([\#16663](https://github.com/matrix-org/synapse/issues/16663))
-* Bump pyo3 (0.19.2→0.20.0), pythonize (0.19.0→0.20.0) and pyo3-log (0.8.1→0.9.0). ([\#16673](https://github.com/matrix-org/synapse/issues/16673))
-* Bump pyopenssl from 23.2.0 to 23.3.0. ([\#16662](https://github.com/matrix-org/synapse/issues/16662))
-* Bump ruff from 0.1.4 to 0.1.6. ([\#16690](https://github.com/matrix-org/synapse/issues/16690))
-* Bump sentry-sdk from 1.32.0 to 1.35.0. ([\#16666](https://github.com/matrix-org/synapse/issues/16666))
-* Bump serde from 1.0.192 to 1.0.193. ([\#16693](https://github.com/matrix-org/synapse/issues/16693))
-* Bump sphinx-autodoc2 from 0.4.2 to 0.5.0. ([\#16723](https://github.com/matrix-org/synapse/issues/16723))
-* Bump types-jsonschema from 4.19.0.4 to 4.20.0.0. ([\#16724](https://github.com/matrix-org/synapse/issues/16724))
-* Bump types-pillow from 10.1.0.0 to 10.1.0.2. ([\#16664](https://github.com/matrix-org/synapse/issues/16664))
-* Bump types-psycopg2 from 2.9.21.15 to 2.9.21.16. ([\#16665](https://github.com/matrix-org/synapse/issues/16665))
-* Bump types-setuptools from 68.2.0.0 to 68.2.0.2. ([\#16688](https://github.com/matrix-org/synapse/issues/16688))
-
-# Synapse 1.97.0 (2023-11-28)
-
-Synapse will soon be forked by Element under an AGPLv3.0 licence (with CLA, for
-proprietary dual licensing). You can read more about this here:
-
- - https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
- - https://element.io/blog/element-to-adopt-agplv3/
-
-The Matrix.org Foundation copy of the project will be archived. Any changes needed
-by server administrators will be communicated via our usual announcements channels,
-but we are striving to make this as seamless as possible.
-
-
-No significant changes since 1.97.0rc1.
-
-
-# Synapse 1.97.0rc1 (2023-11-21)
-
-### Features
-
-- Add support for asynchronous uploads as defined by [MSC2246](https://github.com/matrix-org/matrix-spec-proposals/pull/2246). Contributed by @sumnerevans at @beeper. ([\#15503](https://github.com/matrix-org/synapse/issues/15503))
-- Improve the performance of some operations in multi-worker deployments. ([\#16613](https://github.com/matrix-org/synapse/issues/16613), [\#16616](https://github.com/matrix-org/synapse/issues/16616))
-
-### Bugfixes
-
-- Fix a long-standing bug where some queries updated the same row twice. Introduced in Synapse 1.57.0. ([\#16609](https://github.com/matrix-org/synapse/issues/16609))
-- Fix a long-standing bug where Synapse would not unbind third-party identifiers for Application Service users when deactivated and would not emit a compliant response. ([\#16617](https://github.com/matrix-org/synapse/issues/16617))
-- Fix sending out of order `POSITION` over replication, causing additional database load. ([\#16639](https://github.com/matrix-org/synapse/issues/16639))
-
-### Improved Documentation
-
-- Note that the option [`outbound_federation_restricted_to`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#outbound_federation_restricted_to) was added in Synapse 1.89.0, and fix a nearby formatting error. ([\#16628](https://github.com/matrix-org/synapse/issues/16628))
-- Update parameter information for the `/timestamp_to_event` admin API. ([\#16631](https://github.com/matrix-org/synapse/issues/16631))
-- Provide an example for a common encrypted media response from the admin user media API and mention possible null values. ([\#16654](https://github.com/matrix-org/synapse/issues/16654))
-
-### Internal Changes
-
-- Remove whole table locks on push rule modifications. Contributed by Nick @ Beeper (@fizzadar). ([\#16051](https://github.com/matrix-org/synapse/issues/16051))
-- Support reactor tick timings on more types of event loops. ([\#16532](https://github.com/matrix-org/synapse/issues/16532))
-- Improve type hints. ([\#16564](https://github.com/matrix-org/synapse/issues/16564), [\#16611](https://github.com/matrix-org/synapse/issues/16611), [\#16612](https://github.com/matrix-org/synapse/issues/16612))
-- Avoid executing no-op queries. ([\#16583](https://github.com/matrix-org/synapse/issues/16583))
-- Simplify persistence code to be per-room. ([\#16584](https://github.com/matrix-org/synapse/issues/16584))
-- Use standard SQL helpers in persistence code. ([\#16585](https://github.com/matrix-org/synapse/issues/16585))
-- Avoid updating the stream cache unnecessarily. ([\#16586](https://github.com/matrix-org/synapse/issues/16586))
-- Improve performance when using opentracing. ([\#16589](https://github.com/matrix-org/synapse/issues/16589))
-- Run push rule evaluator setup in parallel. ([\#16590](https://github.com/matrix-org/synapse/issues/16590))
-- Improve tests of the SQL generator. ([\#16596](https://github.com/matrix-org/synapse/issues/16596))
-- Use more generic database methods. ([\#16615](https://github.com/matrix-org/synapse/issues/16615))
-- Use `dbname` instead of the deprecated `database` connection parameter for psycopg2. ([\#16618](https://github.com/matrix-org/synapse/issues/16618))
-- Add an internal [Admin API endpoint](https://matrix-org.github.io/synapse/v1.97/usage/configuration/config_documentation.html#allow-replacing-master-cross-signing-key-without-user-interactive-auth) to temporarily grant the ability to update an existing cross-signing key without UIA. ([\#16634](https://github.com/matrix-org/synapse/issues/16634))
-- Improve references to GitHub issues. ([\#16637](https://github.com/matrix-org/synapse/issues/16637), [\#16638](https://github.com/matrix-org/synapse/issues/16638))
-- More efficiently handle no-op `POSITION` over replication. ([\#16640](https://github.com/matrix-org/synapse/issues/16640), [\#16655](https://github.com/matrix-org/synapse/issues/16655))
-- Speed up deleting of device messages when deleting a device. ([\#16643](https://github.com/matrix-org/synapse/issues/16643))
-- Speed up persisting large number of outliers. ([\#16649](https://github.com/matrix-org/synapse/issues/16649))
-- Reduce max concurrency of background tasks, reducing potential max DB load. ([\#16656](https://github.com/matrix-org/synapse/issues/16656), [\#16660](https://github.com/matrix-org/synapse/issues/16660))
-- Speed up purge room by adding an index to `event_push_summary`. ([\#16657](https://github.com/matrix-org/synapse/issues/16657))
-
-
-
-### Updates to locked dependencies
-
-* Bump prometheus-client from 0.17.1 to 0.18.0. ([\#16626](https://github.com/matrix-org/synapse/issues/16626))
-* Bump pyicu from 2.11 to 2.12. ([\#16603](https://github.com/matrix-org/synapse/issues/16603))
-* Bump requests-toolbelt from 0.10.1 to 1.0.0. ([\#16659](https://github.com/matrix-org/synapse/issues/16659))
-* Bump ruff from 0.0.292 to 0.1.4. ([\#16600](https://github.com/matrix-org/synapse/issues/16600))
-* Bump serde from 1.0.190 to 1.0.192. ([\#16627](https://github.com/matrix-org/synapse/issues/16627))
-* Bump serde_json from 1.0.107 to 1.0.108. ([\#16604](https://github.com/matrix-org/synapse/issues/16604))
-* Bump setuptools-rust from 1.8.0 to 1.8.1. ([\#16601](https://github.com/matrix-org/synapse/issues/16601))
-* Bump towncrier from 23.6.0 to 23.11.0. ([\#16622](https://github.com/matrix-org/synapse/issues/16622))
-* Bump treq from 22.2.0 to 23.11.0. ([\#16623](https://github.com/matrix-org/synapse/issues/16623))
-* Bump twisted from 23.8.0 to 23.10.0. ([\#16588](https://github.com/matrix-org/synapse/issues/16588))
-* Bump types-bleach from 6.1.0.0 to 6.1.0.1. ([\#16624](https://github.com/matrix-org/synapse/issues/16624))
-* Bump types-jsonschema from 4.19.0.3 to 4.19.0.4. ([\#16599](https://github.com/matrix-org/synapse/issues/16599))
-* Bump types-pyopenssl from 23.2.0.2 to 23.3.0.0. ([\#16625](https://github.com/matrix-org/synapse/issues/16625))
-* Bump types-pyyaml from 6.0.12.11 to 6.0.12.12. ([\#16602](https://github.com/matrix-org/synapse/issues/16602))
-
-# Synapse 1.96.1 (2023-11-17)
-
-Synapse will soon be forked by Element under an AGPLv3.0 licence (with CLA, for
-proprietary dual licensing). You can read more about this here:
-
-* https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
-* https://element.io/blog/element-to-adopt-agplv3/
-
-The Matrix.org Foundation copy of the project will be archived. Any changes needed
-by server administrators will be communicated via our usual
-[announcements channels](https://matrix.to/#/#homeowners:matrix.org), but we are
-striving to make this as seamless as possible.
-
-This minor release was needed only because of CI-related trouble on [v1.96.0](https://github.com/matrix-org/synapse/releases/tag/v1.96.0), which was never released.
-
-### Internal Changes
-
-- Fix building of wheels in CI. ([\#16653](https://github.com/matrix-org/synapse/issues/16653))
-
-# Synapse 1.96.0 (2023-11-16)
-
-### Bugfixes
-
-- Fix "'int' object is not iterable" error in `set_device_id_for_pushers` background update introduced in Synapse 1.95.0. ([\#16594](https://github.com/matrix-org/synapse/issues/16594))
-
-# Synapse 1.96.0rc1 (2023-10-31)
-
-### Features
-
-- Add experimental support to allow multiple workers to write to receipts stream. ([\#16432](https://github.com/matrix-org/synapse/issues/16432))
-- Add a new module API for controller presence. ([\#16544](https://github.com/matrix-org/synapse/issues/16544))
-- Add a new module API callback that allows adding extra fields to events' unsigned section when sent down to clients. ([\#16549](https://github.com/matrix-org/synapse/issues/16549))
-- Improve the performance of claiming encryption keys. ([\#16565](https://github.com/matrix-org/synapse/issues/16565), [\#16570](https://github.com/matrix-org/synapse/issues/16570))
-
-### Bugfixes
-
-- Fixed a bug in the example Grafana dashboard that prevents it from finding the correct datasource. Contributed by @MichaelSasser. ([\#16471](https://github.com/matrix-org/synapse/issues/16471))
-- Fix a long-standing, exceedingly rare edge case where the first event persisted by a new event persister worker might not be sent down `/sync`. ([\#16473](https://github.com/matrix-org/synapse/issues/16473), [\#16557](https://github.com/matrix-org/synapse/issues/16557), [\#16561](https://github.com/matrix-org/synapse/issues/16561), [\#16578](https://github.com/matrix-org/synapse/issues/16578), [\#16580](https://github.com/matrix-org/synapse/issues/16580))
-- Fix long-standing bug where `/sync` incorrectly did not mark a room as `limited` in a sync requests when there were missing remote events. ([\#16485](https://github.com/matrix-org/synapse/issues/16485))
-- Fix a bug introduced in Synapse 1.41 where HTTP(S) forward proxy authorization would fail when using basic HTTP authentication with a long `username:password` string. ([\#16504](https://github.com/matrix-org/synapse/issues/16504))
-- Force TLS certificate verification in user registration script. ([\#16530](https://github.com/matrix-org/synapse/issues/16530))
-- Fix long-standing bug where `/sync` could tightloop after restart when using SQLite. ([\#16540](https://github.com/matrix-org/synapse/issues/16540))
-- Fix ratelimiting of message sending when using workers, where the ratelimit would only be applied after most of the work has been done. ([\#16558](https://github.com/matrix-org/synapse/issues/16558))
-- Fix a long-standing bug where invited/knocking users would not leave during a room purge. ([\#16559](https://github.com/matrix-org/synapse/issues/16559))
-
-### Improved Documentation
-
-- Improve documentation of presence router. ([\#16529](https://github.com/matrix-org/synapse/issues/16529))
-- Add a sentence to the [opentracing docs](https://matrix-org.github.io/synapse/latest/opentracing.html) on how you can have jaeger in a different place than synapse. ([\#16531](https://github.com/matrix-org/synapse/issues/16531))
-- Correctly describe the meaning of unspecified rule lists in the [`alias_creation_rules`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#alias_creation_rules) and [`room_list_publication_rules`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#room_list_publication_rules) config options and improve their descriptions more generally. ([\#16541](https://github.com/matrix-org/synapse/issues/16541))
-- Pin the recommended poetry version in [contributors' guide](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html). ([\#16550](https://github.com/matrix-org/synapse/issues/16550))
-- Fix a broken link to the [client breakdown](https://matrix.org/ecosystem/clients/) in the README. ([\#16569](https://github.com/matrix-org/synapse/issues/16569))
-
-### Internal Changes
-
-- Improve performance of delete device messages query, cf issue [16479](https://github.com/matrix-org/synapse/issues/16479). ([\#16492](https://github.com/matrix-org/synapse/issues/16492))
-- Reduce memory allocations. ([\#16505](https://github.com/matrix-org/synapse/issues/16505))
-- Improve replication performance when purging rooms. ([\#16510](https://github.com/matrix-org/synapse/issues/16510))
-- Run tests against Python 3.12. ([\#16511](https://github.com/matrix-org/synapse/issues/16511))
-- Run trial & integration tests in continuous integration when `.ci` directory is modified. ([\#16512](https://github.com/matrix-org/synapse/issues/16512))
-- Remove duplicate call to mark remote server 'awake' when using a federation sending worker. ([\#16515](https://github.com/matrix-org/synapse/issues/16515))
-- Enable dirty runs on Complement CI, which is significantly faster. ([\#16520](https://github.com/matrix-org/synapse/issues/16520))
-- Stop deleting from an unused table. ([\#16521](https://github.com/matrix-org/synapse/issues/16521))
-- Improve type hints. ([\#16526](https://github.com/matrix-org/synapse/issues/16526), [\#16551](https://github.com/matrix-org/synapse/issues/16551))
-- Fix running unit tests on Twisted trunk. ([\#16528](https://github.com/matrix-org/synapse/issues/16528))
-- Reduce some spurious logging in worker mode. ([\#16555](https://github.com/matrix-org/synapse/issues/16555))
-- Stop porting a table in port db that we're going to nuke and rebuild anyway. ([\#16563](https://github.com/matrix-org/synapse/issues/16563))
-- Deal with warnings from running complement in CI. ([\#16567](https://github.com/matrix-org/synapse/issues/16567))
-- Allow building with `setuptools_rust` 1.8.0. ([\#16574](https://github.com/matrix-org/synapse/issues/16574))
-
-### Updates to locked dependencies
-
-* Bump black from 23.10.0 to 23.10.1. ([\#16575](https://github.com/matrix-org/synapse/issues/16575))
-* Bump black from 23.9.1 to 23.10.0. ([\#16538](https://github.com/matrix-org/synapse/issues/16538))
-* Bump cryptography from 41.0.4 to 41.0.5. ([\#16572](https://github.com/matrix-org/synapse/issues/16572))
-* Bump gitpython from 3.1.37 to 3.1.40. ([\#16534](https://github.com/matrix-org/synapse/issues/16534))
-* Bump phonenumbers from 8.13.22 to 8.13.23. ([\#16576](https://github.com/matrix-org/synapse/issues/16576))
-* Bump pygithub from 1.59.1 to 2.1.1. ([\#16535](https://github.com/matrix-org/synapse/issues/16535))
-- Bump matrix-synapse-ldap3 from 0.2.2 to 0.3.0. ([\#16539](https://github.com/matrix-org/synapse/issues/16539))
-* Bump serde from 1.0.189 to 1.0.190. ([\#16577](https://github.com/matrix-org/synapse/issues/16577))
-* Bump setuptools-rust from 1.7.0 to 1.8.0. ([\#16574](https://github.com/matrix-org/synapse/issues/16574))
-* Bump types-pillow from 10.0.0.3 to 10.1.0.0. ([\#16536](https://github.com/matrix-org/synapse/issues/16536))
-* Bump types-psycopg2 from 2.9.21.14 to 2.9.21.15. ([\#16573](https://github.com/matrix-org/synapse/issues/16573))
-* Bump types-requests from 2.31.0.2 to 2.31.0.10. ([\#16537](https://github.com/matrix-org/synapse/issues/16537))
-* Bump urllib3 from 1.26.17 to 1.26.18. ([\#16516](https://github.com/matrix-org/synapse/issues/16516))
-
-# Synapse 1.95.1 (2023-10-31)
-
-## Security advisory
-
-The following issue is fixed in 1.95.1.
-
-- [GHSA-mp92-3jfm-3575](https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575) / [CVE-2023-43796](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43796) — Moderate Severity
-
-  Cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver.
-
-See the advisory for more details. If you have any questions, email security@matrix.org.
-
-
-
-# Synapse 1.95.0 (2023-10-24)
-
-### Internal Changes
-
-- Build Debian packages for [Ubuntu 23.10 Mantic Minotaur](https://canonical.com/blog/canonical-releases-ubuntu-23-10-mantic-minotaur). ([\#16524](https://github.com/matrix-org/synapse/issues/16524))
-
-
-# Synapse 1.95.0rc1 (2023-10-17)
-
-### Bugfixes
-
-- Remove legacy unspecced `knock_state_events` field returned in some responses. ([\#16403](https://github.com/matrix-org/synapse/issues/16403))
-- Fix a bug introduced in Synapse 1.81.0 where an `AttributeError` would be raised when `_matrix/client/v3/account/whoami` is called over a unix socket. Contributed by @Sir-Photch. ([\#16404](https://github.com/matrix-org/synapse/issues/16404))
-- Properly return inline media when content types have parameters. ([\#16440](https://github.com/matrix-org/synapse/issues/16440))
-- Prevent the purging of large rooms from timing out when Postgres is in use. The timeout which causes this issue was introduced in Synapse 1.88.0. ([\#16455](https://github.com/matrix-org/synapse/issues/16455))
-- Improve the performance of purging rooms, particularly encrypted rooms. ([\#16457](https://github.com/matrix-org/synapse/issues/16457))
-- Fix a bug introduced in Synapse 1.59.0 where servers could be incorrectly marked as available after an error response was received. ([\#16506](https://github.com/matrix-org/synapse/issues/16506))
-
-### Improved Documentation
-
-- Document internal background update mechanism. ([\#16420](https://github.com/matrix-org/synapse/issues/16420))
-- Fix a typo in the sql for [useful SQL for admins document](https://matrix-org.github.io/synapse/latest/usage/administration/useful_sql_for_admins.html). ([\#16477](https://github.com/matrix-org/synapse/issues/16477))
-
-### Internal Changes
-
-- Bump pyo3 from 0.17.1 to 0.19.2. ([\#16162](https://github.com/matrix-org/synapse/issues/16162))
-- Update registration of media repository URLs. ([\#16419](https://github.com/matrix-org/synapse/issues/16419))
-- Improve type hints. ([\#16421](https://github.com/matrix-org/synapse/issues/16421), [\#16468](https://github.com/matrix-org/synapse/issues/16468), [\#16469](https://github.com/matrix-org/synapse/issues/16469), [\#16507](https://github.com/matrix-org/synapse/issues/16507))
-- Refactor some code to simplify and better type receipts stream adjacent code. ([\#16426](https://github.com/matrix-org/synapse/issues/16426))
-- Factor out `MultiWriter` token from `RoomStreamToken`. ([\#16427](https://github.com/matrix-org/synapse/issues/16427))
-- Improve code comments. ([\#16428](https://github.com/matrix-org/synapse/issues/16428))
-- Reduce memory allocations. ([\#16429](https://github.com/matrix-org/synapse/issues/16429), [\#16431](https://github.com/matrix-org/synapse/issues/16431), [\#16433](https://github.com/matrix-org/synapse/issues/16433), [\#16434](https://github.com/matrix-org/synapse/issues/16434), [\#16438](https://github.com/matrix-org/synapse/issues/16438), [\#16444](https://github.com/matrix-org/synapse/issues/16444))
-- Remove unused method. ([\#16435](https://github.com/matrix-org/synapse/issues/16435))
-- Improve rate limiting logic. ([\#16441](https://github.com/matrix-org/synapse/issues/16441))
-- Do not block running of CI behind the check for sign-off on PRs. ([\#16454](https://github.com/matrix-org/synapse/issues/16454))
-- Update the release script to remind releaser to check for special release notes. ([\#16461](https://github.com/matrix-org/synapse/issues/16461))
-- Update complement.sh to match new public API shape. ([\#16466](https://github.com/matrix-org/synapse/issues/16466))
-- Clean up logging on event persister endpoints. ([\#16488](https://github.com/matrix-org/synapse/issues/16488))
-- Remove useless async job to delete device messages on sync, since we only deliver (and hence delete) up to 100 device messages at a time. ([\#16491](https://github.com/matrix-org/synapse/issues/16491))
-
-### Updates to locked dependencies
-
-* Bump bleach from 6.0.0 to 6.1.0. ([\#16451](https://github.com/matrix-org/synapse/issues/16451))
-* Bump jsonschema from 4.19.0 to 4.19.1. ([\#16500](https://github.com/matrix-org/synapse/issues/16500))
-* Bump netaddr from 0.8.0 to 0.9.0. ([\#16453](https://github.com/matrix-org/synapse/issues/16453))
-* Bump packaging from 23.1 to 23.2. ([\#16497](https://github.com/matrix-org/synapse/issues/16497))
-* Bump pillow from 10.0.1 to 10.1.0. ([\#16498](https://github.com/matrix-org/synapse/issues/16498))
-* Bump psycopg2 from 2.9.8 to 2.9.9. ([\#16452](https://github.com/matrix-org/synapse/issues/16452))
-* Bump pyo3-log from 0.8.3 to 0.8.4. ([\#16495](https://github.com/matrix-org/synapse/issues/16495))
-* Bump ruff from 0.0.290 to 0.0.292. ([\#16449](https://github.com/matrix-org/synapse/issues/16449))
-* Bump sentry-sdk from 1.31.0 to 1.32.0. ([\#16496](https://github.com/matrix-org/synapse/issues/16496))
-* Bump serde from 1.0.188 to 1.0.189. ([\#16494](https://github.com/matrix-org/synapse/issues/16494))
-* Bump types-bleach from 6.0.0.4 to 6.1.0.0. ([\#16450](https://github.com/matrix-org/synapse/issues/16450))
-* Bump types-jsonschema from 4.17.0.10 to 4.19.0.3. ([\#16499](https://github.com/matrix-org/synapse/issues/16499))
-
-# Synapse 1.94.0 (2023-10-10)
-
-No significant changes since 1.94.0rc1.
-However, please take note of the security advisory that follows.
-
-## Security advisory
-
-The following issue is fixed in 1.94.0 (and RC).
-
-- [GHSA-5chr-wjw5-3gq4](https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4) / [CVE-2023-45129](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45129) — Moderate Severity
-
-  A malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service.
-
-  Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected.
-
-See the advisory for more details. If you have any questions, email security@matrix.org.
-
-
-# Synapse 1.94.0rc1 (2023-10-03)
-
-### Features
-
-- Render plain, CSS, CSV, JSON and common image formats in the browser (inline) when requested through the /download endpoint. ([\#15988](https://github.com/matrix-org/synapse/issues/15988))
-- Add experimental support for [MSC4028](https://github.com/matrix-org/matrix-spec-proposals/pull/4028) to push all encrypted events to clients. ([\#16361](https://github.com/matrix-org/synapse/issues/16361))
-- Minor performance improvement when sending presence to federated servers. ([\#16385](https://github.com/matrix-org/synapse/issues/16385))
-- Minor performance improvement by caching server ACL checking. ([\#16360](https://github.com/matrix-org/synapse/issues/16360))
-
-### Improved Documentation
-
-- Add developer documentation concerning gradual schema migrations with column alterations. ([\#15691](https://github.com/matrix-org/synapse/issues/15691))
-- Improve documentation of the user directory search algorithm. ([\#16320](https://github.com/matrix-org/synapse/issues/16320))
-- Fix rendering of user admin API documentation around deactivation. This was broken in Synapse 1.91.0. ([\#16355](https://github.com/matrix-org/synapse/issues/16355))
-- Update documentation around message retention policies. ([\#16382](https://github.com/matrix-org/synapse/issues/16382))
-- Add note to `federation_domain_whitelist` config option to clarify its usage. ([\#16416](https://github.com/matrix-org/synapse/issues/16416))
-- Improve legacy release notes. ([\#16418](https://github.com/matrix-org/synapse/issues/16418))
+- Document `tls` option for a worker instance in `instance_map`. ([\#18064](https://github.com/element-hq/synapse/issues/18064))
 
 ### Deprecations and Removals
 
-- Remove Python version from `/_synapse/admin/v1/server_version`. ([\#16380](https://github.com/matrix-org/synapse/issues/16380))
+- Remove the unstable [MSC4151](https://github.com/matrix-org/matrix-spec-proposals/pull/4151) implementation. The stable support remains, per [Matrix 1.13](https://spec.matrix.org/v1.13/client-server-api/#post_matrixclientv3roomsroomidreport). ([\#18052](https://github.com/element-hq/synapse/issues/18052))
 
 ### Internal Changes
 
-- Avoid running CI steps when the files they check have not been changed. ([\#14745](https://github.com/matrix-org/synapse/issues/14745), [\#16387](https://github.com/matrix-org/synapse/issues/16387))
-- Improve type hints. ([\#14911](https://github.com/matrix-org/synapse/issues/14911), [\#16350](https://github.com/matrix-org/synapse/issues/16350), [\#16356](https://github.com/matrix-org/synapse/issues/16356), [\#16395](https://github.com/matrix-org/synapse/issues/16395))
-- Added support for pydantic v2 in addition to pydantic v1. Contributed by Maxwell G (@gotmax23). ([\#16332](https://github.com/matrix-org/synapse/issues/16332))
-- Get CI to check PRs have been signed-off. ([\#16348](https://github.com/matrix-org/synapse/issues/16348))
-- Add missing licence header. ([\#16359](https://github.com/matrix-org/synapse/issues/16359))
-- Improve type hints, and bump types-psycopg2 from 2.9.21.11 to 2.9.21.14. ([\#16381](https://github.com/matrix-org/synapse/issues/16381))
-- Improve comments in `StateGroupBackgroundUpdateStore`. ([\#16383](https://github.com/matrix-org/synapse/issues/16383))
-- Update maturin configuration. ([\#16394](https://github.com/matrix-org/synapse/issues/16394))
-- Downgrade replication stream time out error log lines to warning. ([\#16401](https://github.com/matrix-org/synapse/issues/16401))
+- Increase invite rate limits (`rc_invites.per_issuer`) for Complement. ([\#18072](https://github.com/element-hq/synapse/issues/18072))
+
+
 
 ### Updates to locked dependencies
 
-* Bump actions/checkout from 3 to 4. ([\#16250](https://github.com/matrix-org/synapse/issues/16250))
-* Bump cryptography from 41.0.3 to 41.0.4. ([\#16362](https://github.com/matrix-org/synapse/issues/16362))
-* Bump dawidd6/action-download-artifact from 2.27.0 to 2.28.0. ([\#16374](https://github.com/matrix-org/synapse/issues/16374))
-* Bump docker/setup-buildx-action from 2 to 3. ([\#16375](https://github.com/matrix-org/synapse/issues/16375))
-* Bump gitpython from 3.1.35 to 3.1.37. ([\#16376](https://github.com/matrix-org/synapse/issues/16376))
-* Bump msgpack from 1.0.5 to 1.0.6. ([\#16377](https://github.com/matrix-org/synapse/issues/16377))
-* Bump msgpack from 1.0.6 to 1.0.7. ([\#16412](https://github.com/matrix-org/synapse/issues/16412))
-* Bump phonenumbers from 8.13.19 to 8.13.22. ([\#16413](https://github.com/matrix-org/synapse/issues/16413))
-* Bump psycopg2 from 2.9.7 to 2.9.8. ([\#16409](https://github.com/matrix-org/synapse/issues/16409))
-* Bump pydantic from 2.3.0 to 2.4.2. ([\#16410](https://github.com/matrix-org/synapse/issues/16410))
-* Bump regex from 1.9.5 to 1.9.6. ([\#16408](https://github.com/matrix-org/synapse/issues/16408))
-* Bump sentry-sdk from 1.30.0 to 1.31.0. ([\#16378](https://github.com/matrix-org/synapse/issues/16378))
-* Bump types-netaddr from 0.8.0.9 to 0.9.0.1. ([\#16411](https://github.com/matrix-org/synapse/issues/16411))
-* Bump types-psycopg2 from 2.9.21.11 to 2.9.21.14. ([\#16381](https://github.com/matrix-org/synapse/issues/16381))
-* Bump urllib3 from 1.26.15 to 1.26.17. ([\#16422](https://github.com/matrix-org/synapse/issues/16422))
+* Bump jinja2 from 3.1.4 to 3.1.5. ([\#18067](https://github.com/element-hq/synapse/issues/18067))
+* Bump mypy from 1.12.1 to 1.13.0. ([\#18083](https://github.com/element-hq/synapse/issues/18083))
+* Bump pillow from 11.0.0 to 11.1.0. ([\#18084](https://github.com/element-hq/synapse/issues/18084))
+* Bump pyo3 from 0.23.3 to 0.23.4. ([\#18079](https://github.com/element-hq/synapse/issues/18079))
+* Bump pyopenssl from 24.2.1 to 24.3.0. ([\#18062](https://github.com/element-hq/synapse/issues/18062))
+* Bump serde_json from 1.0.134 to 1.0.135. ([\#18081](https://github.com/element-hq/synapse/issues/18081))
+* Bump ulid from 1.1.3 to 1.1.4. ([\#18080](https://github.com/element-hq/synapse/issues/18080))
 
-# Synapse 1.93.0 (2023-09-26)
+# Synapse 1.122.0 (2025-01-14)
 
-No significant changes since 1.93.0rc1.
+Please note that this version of Synapse drops support for PostgreSQL 11 and 12. The minimum version of PostgreSQL supported is now version 13.
 
+No significant changes since 1.122.0rc1.
 
-## Security advisory
 
-The following issues are fixed in 1.93.0 (and RCs).
-
-- [GHSA-4f74-84v3-j9q5](https://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5) / [CVE-2023-41335](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335) — Low Severity
-
-  Temporary storage of plaintext passwords during password changes.
-
-- [GHSA-7565-cq32-vx2x](https://github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2x) / [CVE-2023-42453](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42453) — Low Severity
-
-  Improper validation of receipts allows forged read receipts.
-
-See the advisories for more details. If you have any questions, email security@matrix.org.
-
-
-# Synapse 1.93.0rc1 (2023-09-19)
-
-### Features
-
-- Add automatic purge after all users have forgotten a room. ([\#15488](https://github.com/matrix-org/synapse/issues/15488))
-- Restore room purge/shutdown after a Synapse restart. ([\#15488](https://github.com/matrix-org/synapse/issues/15488))
-- Support resolving homeservers using `matrix-fed` DNS SRV records from [MSC4040](https://github.com/matrix-org/matrix-spec-proposals/pull/4040). ([\#16137](https://github.com/matrix-org/synapse/issues/16137))
-- Add the ability to use `G` (GiB) and `T` (TiB) suffixes in configuration options that refer to numbers of bytes. ([\#16219](https://github.com/matrix-org/synapse/issues/16219))
-- Add span information to requests sent to appservices. Contributed by MTRNord. ([\#16227](https://github.com/matrix-org/synapse/issues/16227))
-- Add the ability to enable/disable registrations when using CAS. Contributed by Aurélien Grimpard. ([\#16262](https://github.com/matrix-org/synapse/issues/16262))
-- Allow the `/notifications` endpoint to be routed to workers. ([\#16265](https://github.com/matrix-org/synapse/issues/16265))
-- Enable users to easily unsubscribe to notifications emails via the `List-Unsubscribe` header. ([\#16274](https://github.com/matrix-org/synapse/issues/16274))
-- Report whether a user is `locked` in the [List Accounts admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#list-accounts), and exclude locked users by default. ([\#16328](https://github.com/matrix-org/synapse/issues/16328))
-
-### Bugfixes
-
-- Fix a long-standing bug where multi-device accounts could cause high load due to presence. ([\#16066](https://github.com/matrix-org/synapse/issues/16066), [\#16170](https://github.com/matrix-org/synapse/issues/16170), [\#16171](https://github.com/matrix-org/synapse/issues/16171), [\#16172](https://github.com/matrix-org/synapse/issues/16172), [\#16174](https://github.com/matrix-org/synapse/issues/16174))
-- Fix a long-standing bug where appservices using [MSC2409](https://github.com/matrix-org/matrix-spec-proposals/pull/2409) to receive `to_device` messages would only get messages for one user. ([\#16251](https://github.com/matrix-org/synapse/issues/16251))
-- Fix bug when using workers where Synapse could end up re-requesting the same remote device repeatedly. ([\#16252](https://github.com/matrix-org/synapse/issues/16252))
-- Fix long-standing bug where we kept re-requesting a remote server's key repeatedly, potentially causing delays in receiving events over federation. ([\#16257](https://github.com/matrix-org/synapse/issues/16257))
-- Avoid temporary storage of sensitive information. ([\#16272](https://github.com/matrix-org/synapse/issues/16272))
-- Fix bug introduced in Synapse 1.49.0 when using dehydrated devices ([MSC2697](https://github.com/matrix-org/matrix-spec-proposals/pull/2697)) and refresh tokens. Contributed by Hanadi. ([\#16288](https://github.com/matrix-org/synapse/issues/16288))
-- Fix a long-standing bug where invalid receipts would be accepted. ([\#16327](https://github.com/matrix-org/synapse/issues/16327))
-- Use standard name for UTF-8 charset in emails. ([\#16329](https://github.com/matrix-org/synapse/issues/16329))
-- Don't try refetching device lists for users on remote hosts that are marked as "down". ([\#16298](https://github.com/matrix-org/synapse/issues/16298))
-
-### Improved Documentation
-
-- Fix typos in the documentation. ([\#16282](https://github.com/matrix-org/synapse/issues/16282))
-- Link to the Alpine Linux community package for Synapse. ([\#16304](https://github.com/matrix-org/synapse/issues/16304))
-- Use string for `federation_client_minimum_tls_version` documentation examples. Contributed by @jcgruenhage. ([\#16353](https://github.com/matrix-org/synapse/issues/16353))
-
-### Internal Changes
-
-- Allow modules to delete rooms. ([\#15997](https://github.com/matrix-org/synapse/issues/15997))
-- Add GCC and GNU Make to the Nix flake development environment so that `ruff` can be compiled. ([\#16090](https://github.com/matrix-org/synapse/issues/16090), [\#16263](https://github.com/matrix-org/synapse/issues/16263))
-- Fix type checking when using the new version of Twisted. ([\#16235](https://github.com/matrix-org/synapse/issues/16235))
-- Delete device messages asynchronously and in staged batches using the task scheduler. ([\#16240](https://github.com/matrix-org/synapse/issues/16240), [\#16311](https://github.com/matrix-org/synapse/issues/16311), [\#16312](https://github.com/matrix-org/synapse/issues/16312), [\#16313](https://github.com/matrix-org/synapse/issues/16313))
-- Bump minimum supported Rust version to 1.61.0. ([\#16248](https://github.com/matrix-org/synapse/issues/16248))
-- Update rust to version 1.71.1 in the nix development environment. ([\#16260](https://github.com/matrix-org/synapse/issues/16260))
-- Simplify server key storage. ([\#16261](https://github.com/matrix-org/synapse/issues/16261))
-- Reduce CPU overhead of change password endpoint. ([\#16264](https://github.com/matrix-org/synapse/issues/16264))
-- Stop purging from tables slated for removal. ([\#16273](https://github.com/matrix-org/synapse/issues/16273))
-- Improve type hints. ([\#16276](https://github.com/matrix-org/synapse/issues/16276), [\#16301](https://github.com/matrix-org/synapse/issues/16301), [\#16325](https://github.com/matrix-org/synapse/issues/16325), [\#16326](https://github.com/matrix-org/synapse/issues/16326))
-- Raise `setuptools_rust` version cap to 1.7.0. ([\#16277](https://github.com/matrix-org/synapse/issues/16277))
-- Fix using the new task scheduler causing lots of CPU to be used. ([\#16278](https://github.com/matrix-org/synapse/issues/16278))
-- Upgrade CI run of Python 3.12 from rc1 to rc2. ([\#16280](https://github.com/matrix-org/synapse/issues/16280))
-- Include values in SQL debug when using `execute_values` with Postgres. ([\#16281](https://github.com/matrix-org/synapse/issues/16281))
-- Enable additional linting checks. ([\#16283](https://github.com/matrix-org/synapse/issues/16283))
-- Refactor `receipts_graph` Postgres transactions to stop error messages. ([\#16299](https://github.com/matrix-org/synapse/issues/16299))
-- Small improvements to logging in replication code. ([\#16309](https://github.com/matrix-org/synapse/issues/16309))
-- Remove a reference cycle in background processes. ([\#16314](https://github.com/matrix-org/synapse/issues/16314))
-- Only use literal strings for background process names. ([\#16315](https://github.com/matrix-org/synapse/issues/16315))
-- Refactor `get_user_by_id`. ([\#16316](https://github.com/matrix-org/synapse/issues/16316))
-- Speed up task to delete to-device messages. ([\#16318](https://github.com/matrix-org/synapse/issues/16318))
-- Avoid patching code in tests. ([\#16349](https://github.com/matrix-org/synapse/issues/16349))
-- Test against PostgreSQL 16. ([\#16351](https://github.com/matrix-org/synapse/issues/16351))
-
-### Updates to locked dependencies
-
-* Bump mypy from 1.4.1 to 1.5.1. ([\#16300](https://github.com/matrix-org/synapse/issues/16300))
-* Bump black from 23.7.0 to 23.9.1. ([\#16295](https://github.com/matrix-org/synapse/issues/16295))
-* Bump docker/build-push-action from 4 to 5. ([\#16336](https://github.com/matrix-org/synapse/issues/16336))
-* Bump docker/login-action from 2 to 3. ([\#16339](https://github.com/matrix-org/synapse/issues/16339))
-* Bump docker/metadata-action from 4 to 5. ([\#16337](https://github.com/matrix-org/synapse/issues/16337))
-* Bump docker/setup-qemu-action from 2 to 3. ([\#16338](https://github.com/matrix-org/synapse/issues/16338))
-* Bump furo from 2023.8.19 to 2023.9.10. ([\#16340](https://github.com/matrix-org/synapse/issues/16340))
-* Bump gitpython from 3.1.32 to 3.1.35. ([\#16267](https://github.com/matrix-org/synapse/issues/16267), [\#16279](https://github.com/matrix-org/synapse/issues/16279))
-* Bump mypy-zope from 1.0.0 to 1.0.1. ([\#16291](https://github.com/matrix-org/synapse/issues/16291))
-* Bump pillow from 10.0.0 to 10.0.1. ([\#16344](https://github.com/matrix-org/synapse/issues/16344))
-* Bump regex from 1.9.4 to 1.9.5. ([\#16233](https://github.com/matrix-org/synapse/issues/16233))
-* Bump ruff from 0.0.286 to 0.0.290. ([\#16342](https://github.com/matrix-org/synapse/issues/16342))
-* Bump serde_json from 1.0.105 to 1.0.107. ([\#16296](https://github.com/matrix-org/synapse/issues/16296), [\#16345](https://github.com/matrix-org/synapse/issues/16345))
-* Bump twisted from 22.10.0 to 23.8.0. ([\#16235](https://github.com/matrix-org/synapse/issues/16235))
-* Bump types-pillow from 10.0.0.2 to 10.0.0.3. ([\#16293](https://github.com/matrix-org/synapse/issues/16293))
-* Bump types-setuptools from 68.0.0.3 to 68.2.0.0. ([\#16292](https://github.com/matrix-org/synapse/issues/16292))
-* Bump typing-extensions from 4.7.1 to 4.8.0. ([\#16341](https://github.com/matrix-org/synapse/issues/16341))
-
-# Synapse 1.92.3 (2023-09-18)
-
-This is again a security update targeted at mitigating [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863).
-It turns out that libwebp is bundled statically in Pillow wheels so we need to update this dependency instead of
-libwebp package at the OS level.
-
-Unlike what was advertised in 1.92.2 changelog this release also impacts PyPI wheels and Debian packages from matrix.org.
-
-We encourage admins to upgrade as soon as possible.
-
-
-### Internal Changes
-
-- Pillow 10.0.1 is now mandatory because of libwebp CVE-2023-4863, since Pillow provides libwebp in the wheels. ([\#16347](https://github.com/matrix-org/synapse/issues/16347))
-
-### Updates to locked dependencies
-
-* Bump pillow from 10.0.0 to 10.0.1. ([\#16344](https://github.com/matrix-org/synapse/issues/16344))
-
-# Synapse 1.92.2 (2023-09-15)
-
-This is a Docker-only update to mitigate [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863), a critical vulnerability in `libwebp`. Server admins not using Docker should ensure that their `libwebp` is up to date (if installed). We encourage admins to upgrade as soon as possible.
-
-
-### Updates to the Docker image
-
-- Update docker image to use Debian bookworm as the base. ([\#16324](https://github.com/matrix-org/synapse/issues/16324))
-
-
-# Synapse 1.92.1 (2023-09-12)
-
-This minor release was needed only because of CI-related trouble on [v1.92.0](https://github.com/matrix-org/synapse/releases/tag/v1.92.0), which was never released.
-
-### Internal Changes
-
-- Stop building Ubuntu Kinetic since it is EOL and repos seem to be dead.
-
-
-# Synapse 1.92.0 (2023-09-12)
-
-This release includes the same [bugfix](https://github.com/matrix-org/synapse/issues/16258) as Synapse 1.91.2.
-
-This version was never released following a CI build failure, cf [v1.92.1 changelog](https://github.com/matrix-org/synapse/releases/tag/v1.92.1).
-
-### Bugfixes
-
-- Revert [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) introspection cache, admin impersonation and account lock. ([\#16258](https://github.com/matrix-org/synapse/issues/16258))
-
-### Internal Changes
-
-- Fix incorrect docstring for `Ratelimiter`. ([\#16255](https://github.com/matrix-org/synapse/issues/16255))
-- Update the release script to work on macOS. ([\#16266](https://github.com/matrix-org/synapse/issues/16266))
-
-
-# Synapse 1.91.2 (2023-09-06)
-
-### Bugfixes
-
-- Revert [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) introspection cache, admin impersonation and account lock. ([\#16258](https://github.com/matrix-org/synapse/issues/16258))
-
-
-# Synapse 1.92.0rc1 (2023-09-05)
-
-### Features
-
-- Add configuration setting for CAS protocol version. Contributed by Aurélien Grimpard. ([\#15816](https://github.com/matrix-org/synapse/issues/15816))
-- Suppress notifications from message edits per [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958). ([\#16113](https://github.com/matrix-org/synapse/issues/16113))
-- Experimental support for [MSC4041](https://github.com/matrix-org/matrix-spec-proposals/pull/4041): return a `Retry-After` header with `M_LIMIT_EXCEEDED` error responses. ([\#16136](https://github.com/matrix-org/synapse/issues/16136))
-- Add `last_seen_ts` to the [admin users API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html). ([\#16218](https://github.com/matrix-org/synapse/issues/16218))
-- Improve resource usage when sending data to a large number of remote hosts that are marked as "down". ([\#16223](https://github.com/matrix-org/synapse/issues/16223))
-
-### Bugfixes
-
-- Fix IPv6-related bugs on SMTP settings, adding groundwork to fix similar issues. Contributed by @evilham and @telmich (ungleich.ch). ([\#16155](https://github.com/matrix-org/synapse/issues/16155))
-- Fix a spec compliance issue where requests to the `/publicRooms` federation API would specify `include_all_networks` as a string. ([\#16185](https://github.com/matrix-org/synapse/issues/16185))
-- Fix inaccurate error message while attempting to ban or unban a user with the same or higher PL by spliting the conditional statements. Contributed by @leviosacz. ([\#16205](https://github.com/matrix-org/synapse/issues/16205))
-- Fix a rare bug that broke looping calls, which could lead to e.g. linearly increasing memory usage. Introduced in v1.90.0. ([\#16210](https://github.com/matrix-org/synapse/issues/16210))
-- Fix a long-standing bug where uploading images would fail if we could not generate thumbnails for them. ([\#16211](https://github.com/matrix-org/synapse/issues/16211))
-- Fix a long-standing bug where we did not correctly back off from servers that had "gone" if they returned 4xx series error codes. ([\#16221](https://github.com/matrix-org/synapse/issues/16221))
-
-### Improved Documentation
-
-- Update links to the [matrix.org blog](https://matrix.org/blog/). ([\#16008](https://github.com/matrix-org/synapse/issues/16008))
-- Document which [admin APIs](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) are disabled when experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support is enabled. ([\#16168](https://github.com/matrix-org/synapse/issues/16168))
-- Document [`exclude_rooms_from_sync`](https://matrix-org.github.io/synapse/v1.92/usage/configuration/config_documentation.html#exclude_rooms_from_sync) configuration option. ([\#16178](https://github.com/matrix-org/synapse/issues/16178))
-
-### Internal Changes
-
-- Prepare unit tests for Python 3.12. ([\#16099](https://github.com/matrix-org/synapse/issues/16099))
-- Fix nightly CI jobs. ([\#16121](https://github.com/matrix-org/synapse/issues/16121), [\#16213](https://github.com/matrix-org/synapse/issues/16213))
-- Describe which rate limiter was hit in logs. ([\#16135](https://github.com/matrix-org/synapse/issues/16135))
-- Simplify presence code when using workers. ([\#16170](https://github.com/matrix-org/synapse/issues/16170))
-- Track per-device information in the presence code. ([\#16171](https://github.com/matrix-org/synapse/issues/16171), [\#16172](https://github.com/matrix-org/synapse/issues/16172))
-- Stop using the `event_txn_id` table. ([\#16175](https://github.com/matrix-org/synapse/issues/16175))
-- Use `AsyncMock` instead of custom code. ([\#16179](https://github.com/matrix-org/synapse/issues/16179), [\#16180](https://github.com/matrix-org/synapse/issues/16180))
-- Improve error reporting of invalid data passed to `/_matrix/key/v2/query`. ([\#16183](https://github.com/matrix-org/synapse/issues/16183))
-- Task scheduler: add replication notify for new task to launch ASAP. ([\#16184](https://github.com/matrix-org/synapse/issues/16184))
-- Improve type hints. ([\#16186](https://github.com/matrix-org/synapse/issues/16186), [\#16188](https://github.com/matrix-org/synapse/issues/16188), [\#16201](https://github.com/matrix-org/synapse/issues/16201))
-- Bump black version to 23.7.0. ([\#16187](https://github.com/matrix-org/synapse/issues/16187))
-- Log the details of background update failures. ([\#16212](https://github.com/matrix-org/synapse/issues/16212))
-- Cache device resync requests over replication. ([\#16241](https://github.com/matrix-org/synapse/issues/16241))
-
-### Updates to locked dependencies
-
-* Bump anyhow from 1.0.72 to 1.0.75. ([\#16141](https://github.com/matrix-org/synapse/issues/16141))
-* Bump furo from 2023.7.26 to 2023.8.19. ([\#16238](https://github.com/matrix-org/synapse/issues/16238))
-* Bump phonenumbers from 8.13.18 to 8.13.19. ([\#16237](https://github.com/matrix-org/synapse/issues/16237))
-* Bump psycopg2 from 2.9.6 to 2.9.7. ([\#16196](https://github.com/matrix-org/synapse/issues/16196))
-* Bump regex from 1.9.3 to 1.9.4. ([\#16195](https://github.com/matrix-org/synapse/issues/16195))
-* Bump ruff from 0.0.277 to 0.0.286. ([\#16198](https://github.com/matrix-org/synapse/issues/16198))
-* Bump sentry-sdk from 1.29.2 to 1.30.0. ([\#16236](https://github.com/matrix-org/synapse/issues/16236))
-* Bump serde from 1.0.184 to 1.0.188. ([\#16194](https://github.com/matrix-org/synapse/issues/16194))
-* Bump serde_json from 1.0.104 to 1.0.105. ([\#16140](https://github.com/matrix-org/synapse/issues/16140))
-* Bump types-psycopg2 from 2.9.21.10 to 2.9.21.11. ([\#16200](https://github.com/matrix-org/synapse/issues/16200))
-* Bump types-pyyaml from 6.0.12.10 to 6.0.12.11. ([\#16199](https://github.com/matrix-org/synapse/issues/16199))
-
-
-# Synapse 1.91.1 (2023-09-04)
-
-### Bugfixes
-
-- Fix a performance regression introduced in Synapse 1.91.0 where event persistence would cause an excessive linear growth in CPU usage. ([\#16220](https://github.com/matrix-org/synapse/issues/16220))
-
-
-# Synapse 1.91.0 (2023-08-30)
-
-No significant changes since 1.91.0rc1.
-
-
-# Synapse 1.91.0rc1 (2023-08-23)
-
-### Features
-
-- Implements an admin API to lock an user without deactivating them. Based on [MSC3939](https://github.com/matrix-org/matrix-spec-proposals/pull/3939). ([\#15870](https://github.com/matrix-org/synapse/issues/15870))
-- Implements a task scheduler for	resumable potentially long running tasks. ([\#15891](https://github.com/matrix-org/synapse/issues/15891))
-- Allow specifying `client_secret_path` as alternative to `client_secret` for OIDC providers. This avoids leaking the client secret in the homeserver config. Contributed by @Ma27. ([\#16030](https://github.com/matrix-org/synapse/issues/16030))
-- Allow customising the IdP display name, icon, and brand for SAML and CAS providers (in addition to OIDC provider). ([\#16094](https://github.com/matrix-org/synapse/issues/16094))
-- Add an `admins` query parameter to the [List Accounts](https://matrix-org.github.io/synapse/v1.91/admin_api/user_admin_api.html#list-accounts) [admin API](https://matrix-org.github.io/synapse/v1.91/usage/administration/admin_api/index.html), to include only admins or to exclude admins in user queries. ([\#16114](https://github.com/matrix-org/synapse/issues/16114))
-
-### Bugfixes
-
-- Fix long-standing bug where concurrent requests to change a user's push rules could cause a deadlock. Contributed by Nick @ Beeper (@fizzadar). ([\#16052](https://github.com/matrix-org/synapse/issues/16052))
-- Fix a long-standing bu in `/sync` where timeout=0 does not skip caching, resulting in slow calls in cases where there are no new changes. Contributed by @PlasmaIntec. ([\#16080](https://github.com/matrix-org/synapse/issues/16080))
-- Fix performance of state resolutions for large, old rooms that did not have the full auth chain persisted. ([\#16116](https://github.com/matrix-org/synapse/issues/16116))
-- Filter out user agent references to the sliding sync proxy and rust-sdk from the user_daily_visits table to ensure that Element X can be represented fully. ([\#16124](https://github.com/matrix-org/synapse/issues/16124))
-- User constent and 3-PID changes capability cannot be enabled when using experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support. ([\#16127](https://github.com/matrix-org/synapse/issues/16127), [\#16134](https://github.com/matrix-org/synapse/issues/16134))
-- Fix a rare race that could block new events from being sent for up to two minutes. Introduced in v1.90.0. ([\#16133](https://github.com/matrix-org/synapse/issues/16133), [\#16169](https://github.com/matrix-org/synapse/issues/16169))
-- Fix performance degredation when there are a lot of in-flight replication requests. ([\#16148](https://github.com/matrix-org/synapse/issues/16148))
-- Fix a bug introduced in 1.87 where synapse would send an excessive amount of federation requests to servers which have been offline for a long time. Contributed by Nico. ([\#16156](https://github.com/matrix-org/synapse/issues/16156), [\#16164](https://github.com/matrix-org/synapse/issues/16164))
-
-### Improved Documentation
-
-- Structured logging docs: add a link to explain the ELK stack ([\#16091](https://github.com/matrix-org/synapse/issues/16091))
-
-### Internal Changes
-
-- Update dehydrated devices implementation. ([\#16010](https://github.com/matrix-org/synapse/issues/16010))
-- Fix database performance of read/write worker locks. ([\#16061](https://github.com/matrix-org/synapse/issues/16061))
-- Fix building the nix development environment on MacOS systems. ([\#16063](https://github.com/matrix-org/synapse/issues/16063))
-- Override global statement timeout when creating indexes in Postgres. ([\#16085](https://github.com/matrix-org/synapse/issues/16085))
-- Fix the type annotation on `run_db_interaction` in the Module API. ([\#16089](https://github.com/matrix-org/synapse/issues/16089))
-- Clean-up the presence code. ([\#16092](https://github.com/matrix-org/synapse/issues/16092))
-- Run `pyupgrade` for Python 3.8+. ([\#16110](https://github.com/matrix-org/synapse/issues/16110))
-- Rename pagination and purge locks and add comments to explain why they exist and how they work. ([\#16112](https://github.com/matrix-org/synapse/issues/16112))
-- Attempt to fix the twisted trunk job. ([\#16115](https://github.com/matrix-org/synapse/issues/16115))
-- Cache token introspection response from OIDC provider. ([\#16117](https://github.com/matrix-org/synapse/issues/16117))
-- Add cache to `get_server_keys_json_for_remote`. ([\#16123](https://github.com/matrix-org/synapse/issues/16123))
-- Add an admin endpoint to allow authorizing server to signal token revocations. ([\#16125](https://github.com/matrix-org/synapse/issues/16125))
-- Add response time metrics for introspection requests for delegated auth. ([\#16131](https://github.com/matrix-org/synapse/issues/16131))
-- MSC3861: allow impersonation by an admin user using `_oidc_admin_impersonate_user_id` query parameter. ([\#16132](https://github.com/matrix-org/synapse/issues/16132))
-- Increase performance of read/write locks. ([\#16149](https://github.com/matrix-org/synapse/issues/16149))
-- Improve presence tests. ([\#16150](https://github.com/matrix-org/synapse/issues/16150), [\#16151](https://github.com/matrix-org/synapse/issues/16151), [\#16158](https://github.com/matrix-org/synapse/issues/16158))
-- Raised the poetry-core version cap to 1.7.0. ([\#16152](https://github.com/matrix-org/synapse/issues/16152))
-- Fix assertion in user directory unit tests. ([\#16157](https://github.com/matrix-org/synapse/issues/16157))
-- Reduce scope of locks when paginating to alleviate DB contention. ([\#16159](https://github.com/matrix-org/synapse/issues/16159))
-- Reduce DB contention on worker locks. ([\#16160](https://github.com/matrix-org/synapse/issues/16160))
-- Task scheduler: mark task as active if we are scheduling as soon as possible. ([\#16165](https://github.com/matrix-org/synapse/issues/16165))
-
-### Updates to locked dependencies
-
-* Bump click from 8.1.6 to 8.1.7. ([\#16145](https://github.com/matrix-org/synapse/issues/16145))
-* Bump gitpython from 3.1.31 to 3.1.32. ([\#16103](https://github.com/matrix-org/synapse/issues/16103))
-* Bump ijson from 3.2.1 to 3.2.3. ([\#16143](https://github.com/matrix-org/synapse/issues/16143))
-* Bump isort from 5.11.5 to 5.12.0. ([\#16108](https://github.com/matrix-org/synapse/issues/16108))
-* Bump log from 0.4.19 to 0.4.20. ([\#16109](https://github.com/matrix-org/synapse/issues/16109))
-* Bump pygithub from 1.59.0 to 1.59.1. ([\#16144](https://github.com/matrix-org/synapse/issues/16144))
-* Bump sentry-sdk from 1.28.1 to 1.29.2. ([\#16142](https://github.com/matrix-org/synapse/issues/16142))
-* Bump serde from 1.0.183 to 1.0.184. ([\#16139](https://github.com/matrix-org/synapse/issues/16139))
-* Bump txredisapi from 1.4.9 to 1.4.10. ([\#16107](https://github.com/matrix-org/synapse/issues/16107))
-* Bump types-bleach from 6.0.0.3 to 6.0.0.4. ([\#16106](https://github.com/matrix-org/synapse/issues/16106))
-* Bump types-pillow from 10.0.0.1 to 10.0.0.2. ([\#16105](https://github.com/matrix-org/synapse/issues/16105))
-* Bump types-pyopenssl from 23.2.0.1 to 23.2.0.2. ([\#16146](https://github.com/matrix-org/synapse/issues/16146))
-
-# Synapse 1.91.0rc1 (2023-08-23)
-
-### Features
-
-- Implements an admin API to lock an user without deactivating them. Based on [MSC3939](https://github.com/matrix-org/matrix-spec-proposals/pull/3939). ([\#15870](https://github.com/matrix-org/synapse/issues/15870))
-- Allow specifying `client_secret_path` as alternative to `client_secret` for OIDC providers. This avoids leaking the client secret in the homeserver config. Contributed by @Ma27. ([\#16030](https://github.com/matrix-org/synapse/issues/16030))
-- Allow customising the IdP display name, icon, and brand for SAML and CAS providers (in addition to OIDC provider). ([\#16094](https://github.com/matrix-org/synapse/issues/16094))
-- Add an `admins` query parameter to the [List Accounts](https://matrix-org.github.io/synapse/v1.91/admin_api/user_admin_api.html#list-accounts) [admin API](https://matrix-org.github.io/synapse/v1.91/usage/administration/admin_api/index.html), to include only admins or to exclude admins in user queries. ([\#16114](https://github.com/matrix-org/synapse/issues/16114))
-
-### Bugfixes
-
-- Fix long-standing bug where concurrent requests to change a user's push rules could cause a deadlock. Contributed by Nick @ Beeper (@fizzadar). ([\#16052](https://github.com/matrix-org/synapse/issues/16052))
-- Fix a long-standing bug in `/sync` where timeout=0 does not skip caching, resulting in slow calls in cases where there are no new changes. Contributed by @PlasmaIntec. ([\#16080](https://github.com/matrix-org/synapse/issues/16080))
-- Fix performance of state resolutions for large, old rooms that did not have the full auth chain persisted. ([\#16116](https://github.com/matrix-org/synapse/issues/16116))
-- Filter out user agent references to the sliding sync proxy and rust-sdk from the `user_daily_visits` table to ensure that Element X can be represented fully. ([\#16124](https://github.com/matrix-org/synapse/issues/16124))
-- User constent and third-party ID changes capability cannot be enabled when using experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support. ([\#16127](https://github.com/matrix-org/synapse/issues/16127), [\#16134](https://github.com/matrix-org/synapse/issues/16134))
-- Fix a rare race that could block new events from being sent for up to two minutes. Introduced in v1.90.0. ([\#16133](https://github.com/matrix-org/synapse/issues/16133), [\#16169](https://github.com/matrix-org/synapse/issues/16169))
-- Fix performance degredation when there are a lot of in-flight replication requests. ([\#16148](https://github.com/matrix-org/synapse/issues/16148))
-- Fix a bug introduced in 1.87 where synapse would send an excessive amount of federation requests to servers which have been offline for a long time. Contributed by Nico. ([\#16156](https://github.com/matrix-org/synapse/issues/16156), [\#16164](https://github.com/matrix-org/synapse/issues/16164))
-
-### Improved Documentation
-
-- Structured logging docs: add a link to explain the ELK stack ([\#16091](https://github.com/matrix-org/synapse/issues/16091))
-
-### Internal Changes
-
-- Update dehydrated devices implementation. ([\#16010](https://github.com/matrix-org/synapse/issues/16010))
-- Fix database performance of read/write worker locks. ([\#16061](https://github.com/matrix-org/synapse/issues/16061))
-- Fix building the nix development environment on MacOS systems. ([\#16063](https://github.com/matrix-org/synapse/issues/16063))
-- Override global statement timeout when creating indexes in Postgres. ([\#16085](https://github.com/matrix-org/synapse/issues/16085))
-- Fix the type annotation on `run_db_interaction` in the Module API. ([\#16089](https://github.com/matrix-org/synapse/issues/16089))
-- Clean-up the presence code. ([\#16092](https://github.com/matrix-org/synapse/issues/16092))
-- Run `pyupgrade` for Python 3.8+. ([\#16110](https://github.com/matrix-org/synapse/issues/16110))
-- Rename pagination and purge locks and add comments to explain why they exist and how they work. ([\#16112](https://github.com/matrix-org/synapse/issues/16112))
-- Attempt to fix the twisted trunk job. ([\#16115](https://github.com/matrix-org/synapse/issues/16115))
-- Cache token introspection response from OIDC provider. ([\#16117](https://github.com/matrix-org/synapse/issues/16117))
-- Add cache to `get_server_keys_json_for_remote`. ([\#16123](https://github.com/matrix-org/synapse/issues/16123))
-- Add an admin endpoint to allow authorizing server to signal token revocations. ([\#16125](https://github.com/matrix-org/synapse/issues/16125))
-- Add response time metrics for introspection requests for delegated auth. ([\#16131](https://github.com/matrix-org/synapse/issues/16131))
-- [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861): allow impersonation by an admin user using `_oidc_admin_impersonate_user_id` query parameter. ([\#16132](https://github.com/matrix-org/synapse/issues/16132))
-- Increase performance of read/write locks. ([\#16149](https://github.com/matrix-org/synapse/issues/16149))
-- Improve presence tests. ([\#16150](https://github.com/matrix-org/synapse/issues/16150), [\#16151](https://github.com/matrix-org/synapse/issues/16151), [\#16158](https://github.com/matrix-org/synapse/issues/16158))
-- Raised the poetry-core version cap to 1.7.0. ([\#16152](https://github.com/matrix-org/synapse/issues/16152))
-- Fix assertion in user directory unit tests. ([\#16157](https://github.com/matrix-org/synapse/issues/16157))
-- Reduce scope of locks when paginating to alleviate DB contention. ([\#16159](https://github.com/matrix-org/synapse/issues/16159))
-- Reduce DB contention on worker locks. ([\#16160](https://github.com/matrix-org/synapse/issues/16160))
-- Task scheduler: mark task as active if we are scheduling as soon as possible. ([\#16165](https://github.com/matrix-org/synapse/issues/16165))
-- Implements a task scheduler for	resumable potentially long running tasks. ([\#15891](https://github.com/matrix-org/synapse/issues/15891))
-
-### Updates to locked dependencies
-
-* Bump click from 8.1.6 to 8.1.7. ([\#16145](https://github.com/matrix-org/synapse/issues/16145))
-* Bump gitpython from 3.1.31 to 3.1.32. ([\#16103](https://github.com/matrix-org/synapse/issues/16103))
-* Bump ijson from 3.2.1 to 3.2.3. ([\#16143](https://github.com/matrix-org/synapse/issues/16143))
-* Bump isort from 5.11.5 to 5.12.0. ([\#16108](https://github.com/matrix-org/synapse/issues/16108))
-* Bump log from 0.4.19 to 0.4.20. ([\#16109](https://github.com/matrix-org/synapse/issues/16109))
-* Bump pygithub from 1.59.0 to 1.59.1. ([\#16144](https://github.com/matrix-org/synapse/issues/16144))
-* Bump sentry-sdk from 1.28.1 to 1.29.2. ([\#16142](https://github.com/matrix-org/synapse/issues/16142))
-* Bump serde from 1.0.183 to 1.0.184. ([\#16139](https://github.com/matrix-org/synapse/issues/16139))
-* Bump txredisapi from 1.4.9 to 1.4.10. ([\#16107](https://github.com/matrix-org/synapse/issues/16107))
-* Bump types-bleach from 6.0.0.3 to 6.0.0.4. ([\#16106](https://github.com/matrix-org/synapse/issues/16106))
-* Bump types-pillow from 10.0.0.1 to 10.0.0.2. ([\#16105](https://github.com/matrix-org/synapse/issues/16105))
-* Bump types-pyopenssl from 23.2.0.1 to 23.2.0.2. ([\#16146](https://github.com/matrix-org/synapse/issues/16146))
-
-# Synapse 1.90.0 (2023-08-15)
-
-No significant changes since 1.90.0rc1.
-
-
-# Synapse 1.90.0rc1 (2023-08-08)
-
-### Features
-
-- Scope transaction IDs to devices (implement [MSC3970](https://github.com/matrix-org/matrix-spec-proposals/pull/3970)). ([\#15629](https://github.com/matrix-org/synapse/issues/15629))
-- Remove old rows from the `cache_invalidation_stream_by_instance` table automatically (this table is unused in SQLite). ([\#15868](https://github.com/matrix-org/synapse/issues/15868))
-
-### Bugfixes
-
-- Fix a long-standing bug where purging history and paginating simultaneously could lead to database corruption when using workers. ([\#15791](https://github.com/matrix-org/synapse/issues/15791))
-- Fix a long-standing bug where profile endpoint returned a 404 when the user's display name was empty. ([\#16012](https://github.com/matrix-org/synapse/issues/16012))
-- Fix a long-standing bug where the `synapse_port_db` failed to configure sequences for application services and partial stated rooms. ([\#16043](https://github.com/matrix-org/synapse/issues/16043))
-- Fix long-standing bug with deletion in dehydrated devices v2. ([\#16046](https://github.com/matrix-org/synapse/issues/16046))
-
-### Updates to the Docker image
-
-- Add `org.opencontainers.image.version` labels to Docker containers [published by Matrix.org](https://hub.docker.com/r/matrixdotorg/synapse). Contributed by Mo Balaa. ([\#15972](https://github.com/matrix-org/synapse/issues/15972), [\#16009](https://github.com/matrix-org/synapse/issues/16009))
-
-### Improved Documentation
-
-- Add a internal documentation page describing the ["streams" used within Synapse](https://matrix-org.github.io/synapse/v1.90/development/synapse_architecture/streams.html). ([\#16015](https://github.com/matrix-org/synapse/issues/16015))
-- Clarify comment on the keys/upload over replication enpoint. ([\#16016](https://github.com/matrix-org/synapse/issues/16016))
-- Do not expose Admin API in caddy reverse proxy example. Contributed by @NilsIrl. ([\#16027](https://github.com/matrix-org/synapse/issues/16027))
+# Synapse 1.122.0rc1 (2025-01-07)
 
 ### Deprecations and Removals
 
-- Remove support for legacy application service paths. ([\#15964](https://github.com/matrix-org/synapse/issues/15964))
-- Move support for application service query parameter authorization behind a configuration option. ([\#16017](https://github.com/matrix-org/synapse/issues/16017))
-
-### Internal Changes
-
-- Update SQL queries to inline boolean parameters as supported in SQLite 3.27. ([\#15525](https://github.com/matrix-org/synapse/issues/15525))
-- Allow for the configuration of the backoff algorithm for federation destinations. ([\#15754](https://github.com/matrix-org/synapse/issues/15754))
-- Allow modules to check whether the current worker is configured to run background tasks. ([\#15991](https://github.com/matrix-org/synapse/issues/15991))
-- Update support for [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958) to match the latest revision of the MSC. ([\#15992](https://github.com/matrix-org/synapse/issues/15992))
-- Allow modules to schedule delayed background calls. ([\#15993](https://github.com/matrix-org/synapse/issues/15993))
-- Properly overwrite the `redacts` content-property for forwards-compatibility with room versions 1 through 10. ([\#16013](https://github.com/matrix-org/synapse/issues/16013))
-- Fix building the nix development environment on MacOS systems. ([\#16019](https://github.com/matrix-org/synapse/issues/16019))
-- Remove leading and trailing spaces when setting a display name. ([\#16031](https://github.com/matrix-org/synapse/issues/16031))
-- Combine duplicated code. ([\#16023](https://github.com/matrix-org/synapse/issues/16023))
-- Collect additional metrics from `ResponseCache` for eviction. ([\#16028](https://github.com/matrix-org/synapse/issues/16028))
-- Fix endpoint improperly declaring support for MSC3814. ([\#16068](https://github.com/matrix-org/synapse/issues/16068))
-- Drop backwards compat hack for event serialization. ([\#16069](https://github.com/matrix-org/synapse/issues/16069))
-
-### Updates to locked dependencies
-
-* Update PyYAML to 6.0.1. ([\#16011](https://github.com/matrix-org/synapse/issues/16011))
-* Bump cryptography from 41.0.2 to 41.0.3. ([\#16048](https://github.com/matrix-org/synapse/issues/16048))
-* Bump furo from 2023.5.20 to 2023.7.26. ([\#16077](https://github.com/matrix-org/synapse/issues/16077))
-* Bump immutabledict from 2.2.4 to 3.0.0. ([\#16034](https://github.com/matrix-org/synapse/issues/16034))
-* Update certifi to 2023.7.22 and pygments to 2.15.1. ([\#16044](https://github.com/matrix-org/synapse/issues/16044))
-* Bump jsonschema from 4.18.3 to 4.19.0. ([\#16081](https://github.com/matrix-org/synapse/issues/16081))
-* Bump phonenumbers from 8.13.14 to 8.13.18. ([\#16076](https://github.com/matrix-org/synapse/issues/16076))
-* Bump regex from 1.9.1 to 1.9.3. ([\#16073](https://github.com/matrix-org/synapse/issues/16073))
-* Bump serde from 1.0.171 to 1.0.175. ([\#15982](https://github.com/matrix-org/synapse/issues/15982))
-* Bump serde from 1.0.175 to 1.0.179. ([\#16033](https://github.com/matrix-org/synapse/issues/16033))
-* Bump serde from 1.0.179 to 1.0.183. ([\#16074](https://github.com/matrix-org/synapse/issues/16074))
-* Bump serde_json from 1.0.103 to 1.0.104. ([\#16032](https://github.com/matrix-org/synapse/issues/16032))
-* Bump service-identity from 21.1.0 to 23.1.0. ([\#16038](https://github.com/matrix-org/synapse/issues/16038))
-* Bump types-commonmark from 0.9.2.3 to 0.9.2.4. ([\#16037](https://github.com/matrix-org/synapse/issues/16037))
-* Bump types-jsonschema from 4.17.0.8 to 4.17.0.10. ([\#16036](https://github.com/matrix-org/synapse/issues/16036))
-* Bump types-netaddr from 0.8.0.8 to 0.8.0.9. ([\#16035](https://github.com/matrix-org/synapse/issues/16035))
-* Bump types-opentracing from 2.4.10.5 to 2.4.10.6. ([\#16078](https://github.com/matrix-org/synapse/issues/16078))
-* Bump types-setuptools from 68.0.0.0 to 68.0.0.3. ([\#16079](https://github.com/matrix-org/synapse/issues/16079))
-
-# Synapse 1.89.0 (2023-08-01)
-
-No significant changes since 1.89.0rc1.
-
-
-# Synapse 1.89.0rc1 (2023-07-25)
+- Remove support for PostgreSQL 11 and 12. Contributed by @clokep. ([\#18034](https://github.com/element-hq/synapse/issues/18034))
 
 ### Features
 
-- Add Unix Socket support for HTTP Replication Listeners. [Document and provide usage instructions](https://matrix-org.github.io/synapse/v1.89/usage/configuration/config_documentation.html#listeners) for utilizing Unix sockets in Synapse. Contributed by Jason Little. ([\#15708](https://github.com/matrix-org/synapse/issues/15708), [\#15924](https://github.com/matrix-org/synapse/issues/15924))
-- Allow `+` in Matrix IDs, per [MSC4009](https://github.com/matrix-org/matrix-spec-proposals/pull/4009). ([\#15911](https://github.com/matrix-org/synapse/issues/15911))
-- Support room version 11 from [MSC3820](https://github.com/matrix-org/matrix-spec-proposals/pull/3820). ([\#15912](https://github.com/matrix-org/synapse/issues/15912))
-- Allow configuring the set of workers to proxy outbound federation traffic through via `outbound_federation_restricted_to`. ([\#15913](https://github.com/matrix-org/synapse/issues/15913), [\#15969](https://github.com/matrix-org/synapse/issues/15969))
-- Implement [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814), dehydrated devices v2/shrivelled sessions and move [MSC2697](https://github.com/matrix-org/matrix-spec-proposals/pull/2697) behind a config flag. Contributed by Nico from Famedly, H-Shay and poljar. ([\#15929](https://github.com/matrix-org/synapse/issues/15929))
+- Added the `email.tlsname` config option.  This allows specifying the domain name used to validate the SMTP server's TLS certificate separately from the `email.smtp_host` to connect to. ([\#17849](https://github.com/element-hq/synapse/issues/17849))
+- Module developers will have access to the user ID of the requester when adding `check_username_for_spam` callbacks to `spam_checker_module_callbacks`. Contributed by Wilson@Pangea.chat. ([\#17916](https://github.com/element-hq/synapse/issues/17916))
+- Add endpoints to the Admin API to fetch the number of invites the provided user has sent after a given timestamp,
+  fetch the number of rooms the provided user has joined after a given timestamp, and get report IDs of event
+  reports against a provided user (i.e. where the user was the sender of the reported event). ([\#17948](https://github.com/element-hq/synapse/issues/17948))
+- Support stable account suspension from [MSC3823](https://github.com/matrix-org/matrix-spec-proposals/pull/3823). ([\#17964](https://github.com/element-hq/synapse/issues/17964))
+- Add `macaroon_secret_key_path` config option. ([\#17983](https://github.com/element-hq/synapse/issues/17983))
 
 ### Bugfixes
 
-- Fix a long-standing bug where remote invites weren't correctly pushed. ([\#15820](https://github.com/matrix-org/synapse/issues/15820))
-- Fix background schema updates failing over a large upgrade gap. ([\#15887](https://github.com/matrix-org/synapse/issues/15887))
-- Fix a bug introduced in 1.86.0 where Synapse starting with an empty `experimental_features` configuration setting. ([\#15925](https://github.com/matrix-org/synapse/issues/15925))
-- Fixed deploy annotations in the provided Grafana dashboard config, so that it shows for any homeserver and not just matrix.org. Contributed by @wrjlewis. ([\#15957](https://github.com/matrix-org/synapse/issues/15957))
-- Ensure a long state res does not starve CPU by occasionally yielding to the reactor. ([\#15960](https://github.com/matrix-org/synapse/issues/15960))
-- Properly handle redactions of creation events. ([\#15973](https://github.com/matrix-org/synapse/issues/15973))
-- Fix a bug where resyncing stale device lists could block responding to federation transactions, and thus delay receiving new data from the remote server. ([\#15975](https://github.com/matrix-org/synapse/issues/15975))
+- Fix bug when rejecting withdrew invite with a `third_party_rules` module, where the invite would be stuck for the client. ([\#17930](https://github.com/element-hq/synapse/issues/17930))
+- Properly purge state groups tables when purging a room with the Admin API. ([\#18024](https://github.com/element-hq/synapse/issues/18024))
+- Fix a bug preventing the admin redaction endpoint from working on messages from remote users. ([\#18029](https://github.com/element-hq/synapse/issues/18029), [\#18043](https://github.com/element-hq/synapse/issues/18043))
 
 ### Improved Documentation
 
-- Better clarify how to run a worker instance (pass both configs). ([\#15921](https://github.com/matrix-org/synapse/issues/15921))
-- Improve [the documentation](https://matrix-org.github.io/synapse/v1.89/admin_api/user_admin_api.html#login-as-a-user) for the login as a user admin API. ([\#15938](https://github.com/matrix-org/synapse/issues/15938))
-- Fix broken Arch Linux package link. Contributed by @SnipeXandrej. ([\#15981](https://github.com/matrix-org/synapse/issues/15981))
-
-### Deprecations and Removals
-
-- Remove support for calling the `/register` endpoint with an unspecced `user` property for application services. ([\#15928](https://github.com/matrix-org/synapse/issues/15928))
+- Update `synapse.app.generic_worker` documentation to only recommend `GET` requests for stream writer routes by default, unless the worker is also configured as a stream writer. Contributed by @evoL. ([\#17954](https://github.com/element-hq/synapse/issues/17954))
+- Add documentation for the previously-undocumented `last_seen_ts` query parameter to the query user Admin API. ([\#17976](https://github.com/element-hq/synapse/issues/17976))
+- Improve documentation for the `TaskScheduler` class. ([\#17992](https://github.com/element-hq/synapse/issues/17992))
+- Fix example in reverse proxy docs to include server port. ([\#17994](https://github.com/element-hq/synapse/issues/17994))
+- Update Alpine Linux Synapse Package Maintainer within the installation instructions. ([\#17846](https://github.com/element-hq/synapse/issues/17846))
 
 ### Internal Changes
 
-- Mark `get_user_in_directory` private since it is only used in tests. Also remove the cache from it. ([\#15884](https://github.com/matrix-org/synapse/issues/15884))
-- Document which Python version runs on a given Linux distribution so we can more easily clean up later. ([\#15909](https://github.com/matrix-org/synapse/issues/15909))
-- Add details to warning in log when we fail to fetch an alias. ([\#15922](https://github.com/matrix-org/synapse/issues/15922))
-- Remove unneeded `__init__`. ([\#15926](https://github.com/matrix-org/synapse/issues/15926))
-- Fix bug with read/write lock implementation. This is currently unused so has no observable effects. ([\#15933](https://github.com/matrix-org/synapse/issues/15933), [\#15958](https://github.com/matrix-org/synapse/issues/15958))
-- Unbreak the nix development environment by pinning the Rust version to 1.70.0. ([\#15940](https://github.com/matrix-org/synapse/issues/15940))
-- Update presence metrics to differentiate remote vs local users. ([\#15952](https://github.com/matrix-org/synapse/issues/15952))
-- Stop reading from column `user_id` of table `profiles`. ([\#15955](https://github.com/matrix-org/synapse/issues/15955))
-- Build packages for Debian Trixie. ([\#15961](https://github.com/matrix-org/synapse/issues/15961))
-- Reduce the amount of state we pull out. ([\#15968](https://github.com/matrix-org/synapse/issues/15968))
-- Speed up updating state in large rooms. ([\#15971](https://github.com/matrix-org/synapse/issues/15971))
+- Add `RoomID` & `EventID` rust types. ([\#17996](https://github.com/element-hq/synapse/issues/17996))
+- Fix various type errors across the codebase. ([\#17998](https://github.com/element-hq/synapse/issues/17998))
+- Disable DB statement timeout when doing a room purge since it can be quite long. ([\#18017](https://github.com/element-hq/synapse/issues/18017))
+- Remove some remaining uses of `twisted.internet.defer.returnValue`. Contributed by Colin Watson. ([\#18020](https://github.com/element-hq/synapse/issues/18020))
+- Refactor `get_profile` to no longer include fields with a value of `None`. ([\#18063](https://github.com/element-hq/synapse/issues/18063))
 
 ### Updates to locked dependencies
 
-* Bump anyhow from 1.0.71 to 1.0.72. ([\#15949](https://github.com/matrix-org/synapse/issues/15949))
-* Bump click from 8.1.3 to 8.1.6. ([\#15984](https://github.com/matrix-org/synapse/issues/15984))
-* Bump cryptography from 41.0.1 to 41.0.2. ([\#15943](https://github.com/matrix-org/synapse/issues/15943))
-* Bump jsonschema from 4.17.3 to 4.18.3. ([\#15948](https://github.com/matrix-org/synapse/issues/15948))
-* Bump pillow from 9.4.0 to 10.0.0. ([\#15986](https://github.com/matrix-org/synapse/issues/15986))
-* Bump prometheus-client from 0.17.0 to 0.17.1. ([\#15945](https://github.com/matrix-org/synapse/issues/15945))
-* Bump pydantic from 1.10.10 to 1.10.11. ([\#15946](https://github.com/matrix-org/synapse/issues/15946))
-* Bump pygithub from 1.58.2 to 1.59.0. ([\#15834](https://github.com/matrix-org/synapse/issues/15834))
-* Bump pyo3-log from 0.8.2 to 0.8.3. ([\#15951](https://github.com/matrix-org/synapse/issues/15951))
-* Bump sentry-sdk from 1.26.0 to 1.28.1. ([\#15985](https://github.com/matrix-org/synapse/issues/15985))
-* Bump serde_json from 1.0.100 to 1.0.103. ([\#15950](https://github.com/matrix-org/synapse/issues/15950))
-* Bump types-pillow from 9.5.0.4 to 10.0.0.1. ([\#15932](https://github.com/matrix-org/synapse/issues/15932))
-* Bump types-requests from 2.31.0.1 to 2.31.0.2. ([\#15983](https://github.com/matrix-org/synapse/issues/15983))
-* Bump typing-extensions from 4.5.0 to 4.7.1. ([\#15947](https://github.com/matrix-org/synapse/issues/15947))
-
-# Synapse 1.88.0 (2023-07-18)
-
-This release
- - raises the minimum supported version of Python to 3.8, as Python 3.7 is now [end-of-life](https://devguide.python.org/versions/), and
- - removes deprecated config options related to worker deployment.
-
-See [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.88/docs/upgrade.md#upgrading-to-v1880) for more information.
-
-
-### Bugfixes
-
-- Revert "Stop writing to column `user_id` of tables `profiles` and `user_filters`", which was introduced in Synapse 1.88.0rc1. ([\#15953](https://github.com/matrix-org/synapse/issues/15953))
-
-
-# Synapse 1.88.0rc1 (2023-07-11)
-
-### Features
-
-- Add `not_user_type` param to the [list accounts admin API](https://matrix-org.github.io/synapse/v1.88/admin_api/user_admin_api.html#list-accounts). ([\#15844](https://github.com/matrix-org/synapse/issues/15844))
-
-### Bugfixes
-
-- Pin `pydantic` to `^=1.7.4` to avoid backwards-incompatible API changes from the 2.0.0 release.
-  Contributed by @PaarthShah. ([\#15862](https://github.com/matrix-org/synapse/issues/15862))
-- Correctly resize thumbnails with pillow version >=10. ([\#15876](https://github.com/matrix-org/synapse/issues/15876))
-
-### Improved Documentation
-
-- Fixed header levels on the [Admin API "Users"](https://matrix-org.github.io/synapse/v1.87/admin_api/user_admin_api.html) documentation page. Contributed by @sumnerevans at @beeper. ([\#15852](https://github.com/matrix-org/synapse/issues/15852))
-- Remove deprecated `worker_replication_host`, `worker_replication_http_port` and `worker_replication_http_tls` configuration options. ([\#15872](https://github.com/matrix-org/synapse/issues/15872))
-
-### Deprecations and Removals
-
-- **Remove deprecated `worker_replication_host`, `worker_replication_http_port` and `worker_replication_http_tls` configuration options.** See the [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.88/docs/upgrade.md#removal-of-worker_replication_-settings) for more details. ([\#15860](https://github.com/matrix-org/synapse/issues/15860))
-- Remove support for Python 3.7 and hence for Debian Buster. ([\#15851](https://github.com/matrix-org/synapse/issues/15851), [\#15892](https://github.com/matrix-org/synapse/issues/15892), [\#15893](https://github.com/matrix-org/synapse/issues/15893), [\#15917](https://github.com/matrix-org/synapse/pull/15917))
-
-### Internal Changes
-
-- Add foreign key constraint to `event_forward_extremities`. ([\#15751](https://github.com/matrix-org/synapse/issues/15751), [\#15907](https://github.com/matrix-org/synapse/issues/15907))
-- Add read/write style cross-worker locks. ([\#15782](https://github.com/matrix-org/synapse/issues/15782))
-- Stop writing to column `user_id` of tables `profiles` and `user_filters`. ([\#15787](https://github.com/matrix-org/synapse/issues/15787))
-- Use lower isolation level when cleaning old presence stream data to avoid serialization errors. ([\#15826](https://github.com/matrix-org/synapse/issues/15826))
-- Add tracing to media `/upload` code paths. ([\#15850](https://github.com/matrix-org/synapse/issues/15850), [\#15888](https://github.com/matrix-org/synapse/issues/15888))
-- Add a timeout that aborts any Postgres statement taking more than 1 hour. ([\#15853](https://github.com/matrix-org/synapse/issues/15853))
-- Fix the `devenv up` configuration which was ignoring the config overrides. ([\#15854](https://github.com/matrix-org/synapse/issues/15854))
-- Optimised cleanup of old entries in `device_lists_stream`. ([\#15861](https://github.com/matrix-org/synapse/issues/15861))
-- Update the Matrix clients link in the _It works! Synapse is running_ landing page. ([\#15874](https://github.com/matrix-org/synapse/issues/15874))
-- Fix building Synapse with the nightly Rust compiler. ([\#15906](https://github.com/matrix-org/synapse/issues/15906))
-- Add `Server` to Access-Control-Expose-Headers header. ([\#15908](https://github.com/matrix-org/synapse/issues/15908))
-
-### Updates to locked dependencies
-
-* Bump authlib from 1.2.0 to 1.2.1. ([\#15864](https://github.com/matrix-org/synapse/issues/15864))
-* Bump importlib-metadata from 6.6.0 to 6.7.0. ([\#15865](https://github.com/matrix-org/synapse/issues/15865))
-* Bump lxml from 4.9.2 to 4.9.3. ([\#15897](https://github.com/matrix-org/synapse/issues/15897))
-* Bump regex from 1.8.4 to 1.9.1. ([\#15902](https://github.com/matrix-org/synapse/issues/15902))
-* Bump ruff from 0.0.275 to 0.0.277. ([\#15900](https://github.com/matrix-org/synapse/issues/15900))
-* Bump sentry-sdk from 1.25.1 to 1.26.0. ([\#15867](https://github.com/matrix-org/synapse/issues/15867))
-* Bump serde_json from 1.0.99 to 1.0.100. ([\#15901](https://github.com/matrix-org/synapse/issues/15901))
-* Bump types-pyopenssl from 23.2.0.0 to 23.2.0.1. ([\#15866](https://github.com/matrix-org/synapse/issues/15866))
-
-# Synapse 1.87.0 (2023-07-04)
-
-Please note that this will be the last release of Synapse that is compatible with
-Python 3.7 and earlier.
-This is due to Python 3.7 now having reached End of Life; see our [deprecation policy](https://matrix-org.github.io/synapse/v1.87/deprecation_policy.html)
-for more details.
-
-### Bugfixes
-
-- Pin `pydantic` to `^1.7.4` to avoid backwards-incompatible API changes from the 2.0.0 release.
-  Resolves https://github.com/matrix-org/synapse/issues/15858.
-  Contributed by @PaarthShah. ([\#15862](https://github.com/matrix-org/synapse/issues/15862))
-
-### Internal Changes
-
-- Split out 2022 changes from the changelog so the rendered version in GitHub doesn't timeout as much. ([\#15846](https://github.com/matrix-org/synapse/issues/15846))
-
-
-# Synapse 1.87.0rc1 (2023-06-27)
-
-### Features
-
-- Improve `/messages` response time by avoiding backfill when we already have messages to return. ([\#15737](https://github.com/matrix-org/synapse/issues/15737))
-- Add spam checker module API for logins. ([\#15838](https://github.com/matrix-org/synapse/issues/15838))
-
-### Bugfixes
-
-- Fix a long-standing bug where media files were served in an unsafe manner. Contributed by @joshqou. ([\#15680](https://github.com/matrix-org/synapse/issues/15680))
-- Avoid invalidating a cache that was just prefilled. ([\#15758](https://github.com/matrix-org/synapse/issues/15758))
-- Fix requesting multiple keys at once over federation, related to [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983). ([\#15770](https://github.com/matrix-org/synapse/issues/15770))
-- Fix joining rooms through aliases where the alias server isn't a real homeserver. Contributed by @tulir @ Beeper. ([\#15776](https://github.com/matrix-org/synapse/issues/15776))
-- Fix a bug in push rules handling leading to an invalid (per spec) `is_user_mention` rule sent to clients. Also fix wrong rule names for `is_user_mention` and `is_room_mention`. ([\#15781](https://github.com/matrix-org/synapse/issues/15781))
-- Fix a bug introduced in 1.57.0 where the wrong table would be locked on updating database rows when using SQLite as the database backend. ([\#15788](https://github.com/matrix-org/synapse/issues/15788))
-- Fix Sytest environmental variable evaluation in CI. ([\#15804](https://github.com/matrix-org/synapse/issues/15804))
-- Fix forgotten rooms missing from initial sync after rejoining them. Contributed by Nico from Famedly. ([\#15815](https://github.com/matrix-org/synapse/issues/15815))
-- Fix sqlite `user_filters` upgrade introduced in v1.86.0. ([\#15817](https://github.com/matrix-org/synapse/issues/15817))
-
-### Improved Documentation
-
-- Document `looping_call()` functionality that will wait for the given function to finish before scheduling another. ([\#15772](https://github.com/matrix-org/synapse/issues/15772))
-- Fix a typo in the [Admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html). ([\#15805](https://github.com/matrix-org/synapse/issues/15805))
-- Fix typo in MSC number in faster remote room join architecture doc. ([\#15812](https://github.com/matrix-org/synapse/issues/15812))
-
-### Deprecations and Removals
-
-- Remove experimental [MSC2716](https://github.com/matrix-org/matrix-spec-proposals/pull/2716) implementation to incrementally import history into existing rooms. ([\#15748](https://github.com/matrix-org/synapse/issues/15748))
-
-### Internal Changes
-
-- Replace `EventContext` fields `prev_group` and `delta_ids` with field `state_group_deltas`. ([\#15233](https://github.com/matrix-org/synapse/issues/15233))
-- Regularly try to send transactions to other servers after they failed instead of waiting for a new event to be available before trying. ([\#15743](https://github.com/matrix-org/synapse/issues/15743))
-- Fix requesting multiple keys at once over federation, related to [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983). ([\#15755](https://github.com/matrix-org/synapse/issues/15755))
-- Allow for the configuration of max request retries and min/max retry delays in the matrix federation client. ([\#15783](https://github.com/matrix-org/synapse/issues/15783))
-- Switch from `matrix://` to `matrix-federation://` scheme for internal Synapse routing of outbound federation traffic. ([\#15806](https://github.com/matrix-org/synapse/issues/15806))
-- Fix harmless exceptions being printed when running the port DB script. ([\#15814](https://github.com/matrix-org/synapse/issues/15814))
-
-### Updates to locked dependencies
-
-* Bump attrs from 22.2.0 to 23.1.0. ([\#15801](https://github.com/matrix-org/synapse/issues/15801))
-* Bump cryptography from 40.0.2 to 41.0.1. ([\#15800](https://github.com/matrix-org/synapse/issues/15800))
-* Bump ijson from 3.2.0.post0 to 3.2.1. ([\#15802](https://github.com/matrix-org/synapse/issues/15802))
-* Bump phonenumbers from 8.13.13 to 8.13.14. ([\#15798](https://github.com/matrix-org/synapse/issues/15798))
-* Bump ruff from 0.0.265 to 0.0.272. ([\#15799](https://github.com/matrix-org/synapse/issues/15799))
-* Bump ruff from 0.0.272 to 0.0.275. ([\#15833](https://github.com/matrix-org/synapse/issues/15833))
-* Bump serde_json from 1.0.96 to 1.0.97. ([\#15797](https://github.com/matrix-org/synapse/issues/15797))
-* Bump serde_json from 1.0.97 to 1.0.99. ([\#15832](https://github.com/matrix-org/synapse/issues/15832))
-* Bump towncrier from 22.12.0 to 23.6.0. ([\#15831](https://github.com/matrix-org/synapse/issues/15831))
-* Bump types-opentracing from 2.4.10.4 to 2.4.10.5. ([\#15830](https://github.com/matrix-org/synapse/issues/15830))
-* Bump types-setuptools from 67.8.0.0 to 68.0.0.0. ([\#15835](https://github.com/matrix-org/synapse/issues/15835))
-
-Synapse 1.86.0 (2023-06-20)
-===========================
-
-No significant changes since 1.86.0rc2.
-
-
-Synapse 1.86.0rc2 (2023-06-14)
-==============================
-
-Bugfixes
---------
-
-- Fix an error when having workers of different versions running. ([\#15774](https://github.com/matrix-org/synapse/issues/15774))
-
-
-Synapse 1.86.0rc1 (2023-06-13)
-==============================
-
-This version was tagged but never released.
-
-Features
---------
-
-- Stable support for [MSC3882](https://github.com/matrix-org/matrix-spec-proposals/pull/3882) to allow an existing device/session to generate a login token for use on a new device/session. ([\#15388](https://github.com/matrix-org/synapse/issues/15388))
-- Support resolving a room's [canonical alias](https://spec.matrix.org/v1.7/client-server-api/#mroomcanonical_alias) via the module API. ([\#15450](https://github.com/matrix-org/synapse/issues/15450))
-- Enable support for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952): intentional mentions. ([\#15520](https://github.com/matrix-org/synapse/issues/15520))
-- Experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support: delegate auth to an OIDC provider. ([\#15582](https://github.com/matrix-org/synapse/issues/15582))
-- Add Synapse version deploy annotations to Grafana dashboard which enables easy correlation between behavior changes witnessed in a graph to a certain Synapse version and nail down regressions. ([\#15674](https://github.com/matrix-org/synapse/issues/15674))
-- Add a catch-all * to the supported relation types when redacting an event and its related events. This is an update to [MSC3912](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) implementation. ([\#15705](https://github.com/matrix-org/synapse/issues/15705))
-- Speed up `/messages` by backfilling in the background when there are no backward extremities where we are directly paginating. ([\#15710](https://github.com/matrix-org/synapse/issues/15710))
-- Expose a metric reporting the database background update status. ([\#15740](https://github.com/matrix-org/synapse/issues/15740))
-
-
-Bugfixes
---------
-
-- Correctly clear caches when we delete a room. ([\#15609](https://github.com/matrix-org/synapse/issues/15609))
-- Check permissions for enabling encryption earlier during room creation to avoid creating broken rooms. ([\#15695](https://github.com/matrix-org/synapse/issues/15695))
-
-
-Improved Documentation
-----------------------
-
-- Simplify query to find participating servers in a room. ([\#15732](https://github.com/matrix-org/synapse/issues/15732))
-
-
-Internal Changes
-----------------
-
-- Log when events are (maybe unexpectedly) filtered out of responses in tests. ([\#14213](https://github.com/matrix-org/synapse/issues/14213))
-- Read from column `full_user_id` rather than `user_id` of tables `profiles` and `user_filters`. ([\#15649](https://github.com/matrix-org/synapse/issues/15649))
-- Add support for tracing functions which return `Awaitable`s. ([\#15650](https://github.com/matrix-org/synapse/issues/15650))
-- Cache requests for user's devices over federation. ([\#15675](https://github.com/matrix-org/synapse/issues/15675))
-- Add fully qualified docker image names to Dockerfiles. ([\#15689](https://github.com/matrix-org/synapse/issues/15689))
-- Remove some unused code. ([\#15690](https://github.com/matrix-org/synapse/issues/15690))
-- Improve type hints. ([\#15694](https://github.com/matrix-org/synapse/issues/15694), [\#15697](https://github.com/matrix-org/synapse/issues/15697))
-- Update docstring and traces on `maybe_backfill()` functions. ([\#15709](https://github.com/matrix-org/synapse/issues/15709))
-- Add context for when/why to use the `long_retries` option when sending Federation requests. ([\#15721](https://github.com/matrix-org/synapse/issues/15721))
-- Removed some unused fields. ([\#15723](https://github.com/matrix-org/synapse/issues/15723))
-- Update federation error to more plainly explain we can only authorize our own membership events. ([\#15725](https://github.com/matrix-org/synapse/issues/15725))
-- Prevent the `latest_deps` and `twisted_trunk` daily GitHub Actions workflows from running on forks of the codebase. ([\#15726](https://github.com/matrix-org/synapse/issues/15726))
-- Improve performance of user directory search. ([\#15729](https://github.com/matrix-org/synapse/issues/15729))
-- Remove redundant table join with `room_memberships` when doing a `is_host_joined()`/`is_host_invited()` call (`membership` is already part of the `current_state_events`). ([\#15731](https://github.com/matrix-org/synapse/issues/15731))
-- Remove superfluous `room_memberships` join from background update. ([\#15733](https://github.com/matrix-org/synapse/issues/15733))
-- Speed up typechecking CI. ([\#15752](https://github.com/matrix-org/synapse/issues/15752))
-- Bump minimum supported Rust version to 1.60.0. ([\#15768](https://github.com/matrix-org/synapse/issues/15768))
-
-### Updates to locked dependencies
-
-* Bump importlib-metadata from 6.1.0 to 6.6.0. ([\#15711](https://github.com/matrix-org/synapse/issues/15711))
-* Bump library/redis from 6-bullseye to 7-bullseye in /docker. ([\#15712](https://github.com/matrix-org/synapse/issues/15712))
-* Bump log from 0.4.18 to 0.4.19. ([\#15761](https://github.com/matrix-org/synapse/issues/15761))
-* Bump phonenumbers from 8.13.11 to 8.13.13. ([\#15763](https://github.com/matrix-org/synapse/issues/15763))
-* Bump pyasn1 from 0.4.8 to 0.5.0. ([\#15713](https://github.com/matrix-org/synapse/issues/15713))
-* Bump pydantic from 1.10.8 to 1.10.9. ([\#15762](https://github.com/matrix-org/synapse/issues/15762))
-* Bump pyo3-log from 0.8.1 to 0.8.2. ([\#15759](https://github.com/matrix-org/synapse/issues/15759))
-* Bump pyopenssl from 23.1.1 to 23.2.0. ([\#15765](https://github.com/matrix-org/synapse/issues/15765))
-* Bump regex from 1.7.3 to 1.8.4. ([\#15769](https://github.com/matrix-org/synapse/issues/15769))
-* Bump sentry-sdk from 1.22.1 to 1.25.0. ([\#15714](https://github.com/matrix-org/synapse/issues/15714))
-* Bump sentry-sdk from 1.25.0 to 1.25.1. ([\#15764](https://github.com/matrix-org/synapse/issues/15764))
-* Bump serde from 1.0.163 to 1.0.164. ([\#15760](https://github.com/matrix-org/synapse/issues/15760))
-* Bump types-jsonschema from 4.17.0.7 to 4.17.0.8. ([\#15716](https://github.com/matrix-org/synapse/issues/15716))
-* Bump types-pyopenssl from 23.1.0.2 to 23.2.0.0. ([\#15766](https://github.com/matrix-org/synapse/issues/15766))
-* Bump types-requests from 2.31.0.0 to 2.31.0.1. ([\#15715](https://github.com/matrix-org/synapse/issues/15715))
-
-Synapse 1.85.2 (2023-06-08)
-===========================
-
-Bugfixes
---------
-
-- Fix regression where using TLS for HTTP replication between workers did not work. Introduced in v1.85.0. ([\#15746](https://github.com/matrix-org/synapse/issues/15746))
-
-
-Synapse 1.85.1 (2023-06-07)
-===========================
-
-Note: this release only fixes a bug that stopped some deployments from upgrading to v1.85.0. There is no need to upgrade to v1.85.1 if successfully running v1.85.0.
-
-Bugfixes
---------
-
-- Fix bug in schema delta that broke upgrades for some deployments. Introduced in v1.85.0. ([\#15738](https://github.com/matrix-org/synapse/issues/15738), [\#15739](https://github.com/matrix-org/synapse/issues/15739))
-
-
-Synapse 1.85.0 (2023-06-06)
-===========================
-
-No significant changes since 1.85.0rc2.
-
-
-## Security advisory
-
-The following issues are fixed in 1.85.0 (and RCs).
-
-- [GHSA-26c5-ppr8-f33p](https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p) / [CVE-2023-32682](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32682) — Low Severity
-
-  It may be possible for a deactivated user to login when using uncommon configurations.
-
-- [GHSA-98px-6486-j7qc](https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc) / [CVE-2023-32683](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32683) — Low Severity
-
-  A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs).
-
-See the advisories for more details. If you have any questions, email security@matrix.org.
-
-
-Synapse 1.85.0rc2 (2023-06-01)
-==============================
-
-Bugfixes
---------
-
-- Fix a performance issue introduced in Synapse v1.83.0 which meant that purging rooms was very slow and database-intensive. ([\#15693](https://github.com/matrix-org/synapse/issues/15693))
-
-
-Deprecations and Removals
--------------------------
-
-- Deprecate calling the `/register` endpoint with an unspecced `user` property for application services. ([\#15703](https://github.com/matrix-org/synapse/issues/15703))
-
-
-Internal Changes
-----------------
-
-- Speed up background jobs `populate_full_user_id_user_filters` and `populate_full_user_id_profiles`. ([\#15700](https://github.com/matrix-org/synapse/issues/15700))
-
-
-Synapse 1.85.0rc1 (2023-05-30)
-==============================
-
-Features
---------
-
-- Improve performance of backfill requests by performing backfill of previously failed requests in the background. ([\#15585](https://github.com/matrix-org/synapse/issues/15585))
-- Add a new [admin API](https://matrix-org.github.io/synapse/v1.85/usage/administration/admin_api/index.html) to [create a new device for a user](https://matrix-org.github.io/synapse/v1.85/admin_api/user_admin_api.html#create-a-device). ([\#15611](https://github.com/matrix-org/synapse/issues/15611))
-- Add Unix socket support for Redis connections. Contributed by Jason Little. ([\#15644](https://github.com/matrix-org/synapse/issues/15644))
-
-
-Bugfixes
---------
-
-- Fix a long-standing bug where setting the read marker could fail when using message retention. Contributed by Nick @ Beeper (@fizzadar). ([\#15464](https://github.com/matrix-org/synapse/issues/15464))
-- Fix a long-standing bug where the `url_preview_url_blacklist` configuration setting was not applied to oEmbed or image URLs found while previewing a URL. ([\#15601](https://github.com/matrix-org/synapse/issues/15601))
-- Fix a long-standing bug where filters with multiple backslashes were rejected. ([\#15607](https://github.com/matrix-org/synapse/issues/15607))
-- Fix a bug introduced in Synapse 1.82.0 where the error message displayed when validation of the `app_service_config_files` config option fails would be incorrectly formatted. ([\#15614](https://github.com/matrix-org/synapse/issues/15614))
-- Fix a long-standing bug where deactivated users were still able to login using the custom `org.matrix.login.jwt` login type (if enabled). ([\#15624](https://github.com/matrix-org/synapse/issues/15624))
-- Fix a long-standing bug where deactivated users were able to login in uncommon situations. ([\#15634](https://github.com/matrix-org/synapse/issues/15634))
-
-
-Improved Documentation
-----------------------
-
-- Warn users that at least 3.75GB of space is needed for the nix Synapse development environment. ([\#15613](https://github.com/matrix-org/synapse/issues/15613))
-- Remove outdated comment from the generated and sample homeserver log configs. ([\#15648](https://github.com/matrix-org/synapse/issues/15648))
-- Improve contributor docs to make it more clear that Rust is a necessary prerequisite. Contributed by @grantm. ([\#15668](https://github.com/matrix-org/synapse/issues/15668))
-
-
-Deprecations and Removals
--------------------------
-
-- Remove the old version of the R30 (30-day retained users) phone-home metric. ([\#10428](https://github.com/matrix-org/synapse/issues/10428))
-
-
-Internal Changes
-----------------
-
-- Create dependabot changelogs at release time. ([\#15481](https://github.com/matrix-org/synapse/issues/15481))
-- Add not null constraint to column `full_user_id` of tables `profiles` and `user_filters`. ([\#15537](https://github.com/matrix-org/synapse/issues/15537))
-- Allow connecting to HTTP Replication Endpoints by using `worker_name` when constructing the request. ([\#15578](https://github.com/matrix-org/synapse/issues/15578))
-- Make the `thread_id` column on `event_push_actions`, `event_push_actions_staging`, and `event_push_summary` non-null. ([\#15597](https://github.com/matrix-org/synapse/issues/15597))
-- Run mypy type checking with the minimum supported Python version to catch new usage that isn't backwards-compatible. ([\#15602](https://github.com/matrix-org/synapse/issues/15602))
-- Fix subscriptable type usage in Python <3.9. ([\#15604](https://github.com/matrix-org/synapse/issues/15604))
-- Update internal terminology. ([\#15606](https://github.com/matrix-org/synapse/issues/15606), [\#15620](https://github.com/matrix-org/synapse/issues/15620))
-- Instrument `state` and `state_group` storage-related operations to better picture what's happening when tracing. ([\#15610](https://github.com/matrix-org/synapse/issues/15610), [\#15647](https://github.com/matrix-org/synapse/issues/15647))
-- Trace how many new events from the backfill response we need to process. ([\#15633](https://github.com/matrix-org/synapse/issues/15633))
-- Re-type config paths in `ConfigError`s to be `StrSequence`s instead of `Iterable[str]`s. ([\#15615](https://github.com/matrix-org/synapse/issues/15615))
-- Update Mutual Rooms ([MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666)) implementation to match new proposal text. ([\#15621](https://github.com/matrix-org/synapse/issues/15621))
-- Remove the unstable identifiers from faster joins ([MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706)). ([\#15625](https://github.com/matrix-org/synapse/issues/15625))
-- Fix the olddeps CI. ([\#15626](https://github.com/matrix-org/synapse/issues/15626))
-- Remove duplicate timestamp from test logs (`_trial_temp/test.log`). ([\#15636](https://github.com/matrix-org/synapse/issues/15636))
-- Fix two memory leaks in `trial` test runs. ([\#15630](https://github.com/matrix-org/synapse/issues/15630))
-- Limit the size of the `HomeServerConfig` cache in trial test runs. ([\#15646](https://github.com/matrix-org/synapse/issues/15646))
-- Improve type hints. ([\#15658](https://github.com/matrix-org/synapse/issues/15658), [\#15659](https://github.com/matrix-org/synapse/issues/15659))
-- Add requesting user id parameter to key claim methods in `TransportLayerClient`. ([\#15663](https://github.com/matrix-org/synapse/issues/15663))
-- Speed up rebuilding of the user directory for local users. ([\#15665](https://github.com/matrix-org/synapse/issues/15665))
-- Implement "option 2" for [MSC3820](https://github.com/matrix-org/matrix-spec-proposals/pull/3820): Room version 11. ([\#15666](https://github.com/matrix-org/synapse/issues/15666), [\#15678](https://github.com/matrix-org/synapse/issues/15678))
-
-### Updates to locked dependencies
-
-* Bump furo from 2023.3.27 to 2023.5.20. ([\#15642](https://github.com/matrix-org/synapse/issues/15642))
-* Bump log from 0.4.17 to 0.4.18. ([\#15681](https://github.com/matrix-org/synapse/issues/15681))
-* Bump prometheus-client from 0.16.0 to 0.17.0. ([\#15682](https://github.com/matrix-org/synapse/issues/15682))
-* Bump pydantic from 1.10.7 to 1.10.8. ([\#15685](https://github.com/matrix-org/synapse/issues/15685))
-* Bump pygithub from 1.58.1 to 1.58.2. ([\#15643](https://github.com/matrix-org/synapse/issues/15643))
-* Bump requests from 2.28.2 to 2.31.0. ([\#15651](https://github.com/matrix-org/synapse/issues/15651))
-* Bump sphinx from 6.1.3 to 6.2.1. ([\#15641](https://github.com/matrix-org/synapse/issues/15641))
-* Bump types-bleach from 6.0.0.1 to 6.0.0.3. ([\#15686](https://github.com/matrix-org/synapse/issues/15686))
-* Bump types-pillow from 9.5.0.2 to 9.5.0.4. ([\#15640](https://github.com/matrix-org/synapse/issues/15640))
-* Bump types-pyyaml from 6.0.12.9 to 6.0.12.10. ([\#15683](https://github.com/matrix-org/synapse/issues/15683))
-* Bump types-requests from 2.30.0.0 to 2.31.0.0. ([\#15684](https://github.com/matrix-org/synapse/issues/15684))
-* Bump types-setuptools from 67.7.0.2 to 67.8.0.0. ([\#15639](https://github.com/matrix-org/synapse/issues/15639))
-
-Synapse 1.84.1 (2023-05-26)
-===========================
-
-This patch release fixes a major issue with homeservers that do not have an `instance_map` defined but which do use workers.
-If you have already upgraded to Synapse 1.84.0 and your homeserver is working normally, then there is no need to update to this patch release.
-
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse v1.84.0 where workers do not start up when no `instance_map` was provided. ([\#15672](https://github.com/matrix-org/synapse/issues/15672))
-
-
-Internal Changes
-----------------
-
-- Add `dch` and `notify-send` to the development Nix flake so that the release script can be used. ([\#15673](https://github.com/matrix-org/synapse/issues/15673))
-
-
-Synapse 1.84.0 (2023-05-23)
-===========================
-
-The `worker_replication_*` configuration settings have been deprecated in favour of configuring the main process consistently with other instances in the `instance_map`. The deprecated settings will be removed in Synapse v1.88.0, but changing your configuration in advance is recommended. See the [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.84/docs/upgrade.md#upgrading-to-v1840) for more information.
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse 1.84.0rc1 where errors during startup were not reported correctly on Python < 3.10. ([\#15599](https://github.com/matrix-org/synapse/issues/15599))
-
-
-Synapse 1.84.0rc1 (2023-05-16)
-==============================
-
-Features
---------
-
-- Add an option to prevent media downloads from configured domains. ([\#15197](https://github.com/matrix-org/synapse/issues/15197))
-- Add `forget_rooms_on_leave` config option to automatically forget rooms when users leave them or are removed from them. ([\#15224](https://github.com/matrix-org/synapse/issues/15224))
-- Add redis TLS configuration options. ([\#15312](https://github.com/matrix-org/synapse/issues/15312))
-- Add a config option to delay push notifications by a random amount, to discourage time-based profiling. ([\#15516](https://github.com/matrix-org/synapse/issues/15516))
-- Stabilize support for [MSC2659](https://github.com/matrix-org/matrix-spec-proposals/pull/2659): application service ping endpoint. Contributed by Tulir @ Beeper. ([\#15528](https://github.com/matrix-org/synapse/issues/15528))
-- Implement [MSC4009](https://github.com/matrix-org/matrix-spec-proposals/pull/4009) to expand the supported characters in Matrix IDs. ([\#15536](https://github.com/matrix-org/synapse/issues/15536))
-- Advertise support for Matrix 1.6 on `/_matrix/client/versions`. ([\#15559](https://github.com/matrix-org/synapse/issues/15559))
-- Print full error and stack-trace of any exception that occurs during startup/initialization. ([\#15569](https://github.com/matrix-org/synapse/issues/15569))
-
-
-Bugfixes
---------
-
-- Don't fail on federation over TOR where SRV queries are not supported. Contributed by Zdzichu. ([\#15523](https://github.com/matrix-org/synapse/issues/15523))
-- Experimental support for [MSC4010](https://github.com/matrix-org/matrix-spec-proposals/pull/4010) which rejects setting the `"m.push_rules"` via account data. ([\#15554](https://github.com/matrix-org/synapse/issues/15554), [\#15555](https://github.com/matrix-org/synapse/issues/15555))
-- Fix a long-standing bug where an invalid membership event could cause an internal server error. ([\#15564](https://github.com/matrix-org/synapse/issues/15564))
-- Require at least poetry-core v1.1.0. ([\#15566](https://github.com/matrix-org/synapse/issues/15566), [\#15571](https://github.com/matrix-org/synapse/issues/15571))
-
-
-Deprecations and Removals
--------------------------
-
-- Remove need for `worker_replication_*` based settings in worker configuration yaml by placing this data directly on the `instance_map` instead. ([\#15491](https://github.com/matrix-org/synapse/issues/15491))
-
-
-Updates to the Docker image
----------------------------
-
-- Add pkg-config package to Stage 0 to be able to build Dockerfile on ppc64le architecture. ([\#15567](https://github.com/matrix-org/synapse/issues/15567))
-
-
-Improved Documentation
-----------------------
-
-- Clarify documentation of the "Create or modify account" Admin API. ([\#15544](https://github.com/matrix-org/synapse/issues/15544))
-- Fix path to the `statistics/database/rooms` admin API in documentation. ([\#15560](https://github.com/matrix-org/synapse/issues/15560))
-- Update and improve Mastodon Single Sign-On documentation. ([\#15587](https://github.com/matrix-org/synapse/issues/15587))
-
-
-Internal Changes
-----------------
-
-- Use oEmbed to generate URL previews for YouTube Shorts. ([\#15025](https://github.com/matrix-org/synapse/issues/15025))
-- Create new `Client` for use with HTTP Replication between workers. Contributed by Jason Little. ([\#15470](https://github.com/matrix-org/synapse/issues/15470))
-- Bump pyicu from 2.10.2 to 2.11. ([\#15509](https://github.com/matrix-org/synapse/issues/15509))
-- Remove references to supporting per-user flag for [MSC2654](https://github.com/matrix-org/matrix-spec-proposals/pull/2654). ([\#15522](https://github.com/matrix-org/synapse/issues/15522))
-- Don't use a trusted key server when running the demo scripts. ([\#15527](https://github.com/matrix-org/synapse/issues/15527))
-- Speed up rebuilding of the user directory for local users. ([\#15529](https://github.com/matrix-org/synapse/issues/15529))
-- Speed up deleting of old rows in `event_push_actions`. ([\#15531](https://github.com/matrix-org/synapse/issues/15531))
-- Install the `xmlsec` and `mdbook` packages and switch back to the upstream [cachix/devenv](https://github.com/cachix/devenv) repo in the nix development environment. ([\#15532](https://github.com/matrix-org/synapse/issues/15532), [\#15533](https://github.com/matrix-org/synapse/issues/15533), [\#15545](https://github.com/matrix-org/synapse/issues/15545))
-- Implement [MSC3987](https://github.com/matrix-org/matrix-spec-proposals/pull/3987) by removing `"dont_notify"` from the list of actions in default push rules. ([\#15534](https://github.com/matrix-org/synapse/issues/15534))
-- Move various module API callback registration methods to a dedicated class. ([\#15535](https://github.com/matrix-org/synapse/issues/15535))
-- Proxy `/user/devices` federation queries to application services for [MSC3984](https://github.com/matrix-org/matrix-spec-proposals/pull/3984). ([\#15539](https://github.com/matrix-org/synapse/issues/15539))
-- Factor out an `is_mine_server_name` method. ([\#15542](https://github.com/matrix-org/synapse/issues/15542))
-- Allow running Complement tests using [podman](https://podman.io/) by adding a `PODMAN` environment variable to `scripts-dev/complement.sh`. ([\#15543](https://github.com/matrix-org/synapse/issues/15543))
-- Bump serde from 1.0.160 to 1.0.162. ([\#15548](https://github.com/matrix-org/synapse/issues/15548))
-- Bump types-setuptools from 67.6.0.5 to 67.7.0.1. ([\#15549](https://github.com/matrix-org/synapse/issues/15549))
-- Bump sentry-sdk from 1.19.1 to 1.22.1. ([\#15550](https://github.com/matrix-org/synapse/issues/15550))
-- Bump ruff from 0.0.259 to 0.0.265. ([\#15551](https://github.com/matrix-org/synapse/issues/15551))
-- Bump hiredis from 2.2.2 to 2.2.3. ([\#15552](https://github.com/matrix-org/synapse/issues/15552))
-- Bump types-requests from 2.29.0.0 to 2.30.0.0. ([\#15553](https://github.com/matrix-org/synapse/issues/15553))
-- Add `org.matrix.msc3981` info to `/_matrix/client/versions`. ([\#15558](https://github.com/matrix-org/synapse/issues/15558))
-- Declare unstable support for [MSC3391](https://github.com/matrix-org/matrix-spec-proposals/pull/3391) under `/_matrix/client/versions` if the experimental implementation is enabled. ([\#15562](https://github.com/matrix-org/synapse/issues/15562))
-- Implement [MSC3821](https://github.com/matrix-org/matrix-spec-proposals/pull/3821) to update the redaction rules. ([\#15563](https://github.com/matrix-org/synapse/issues/15563))
-- Implement updated redaction rules from [MSC3389](https://github.com/matrix-org/matrix-spec-proposals/pull/3389). ([\#15565](https://github.com/matrix-org/synapse/issues/15565))
-- Allow `pip install` to use setuptools_rust 1.6.0 when building Synapse. ([\#15570](https://github.com/matrix-org/synapse/issues/15570))
-- Deal with upcoming Github Actions deprecations. ([\#15576](https://github.com/matrix-org/synapse/issues/15576))
-- Export `run_as_background_process` from the module API. ([\#15577](https://github.com/matrix-org/synapse/issues/15577))
-- Update build system requirements to allow building with poetry-core==1.6.0. ([\#15588](https://github.com/matrix-org/synapse/issues/15588))
-- Bump serde from 1.0.162 to 1.0.163. ([\#15589](https://github.com/matrix-org/synapse/issues/15589))
-- Bump phonenumbers from 8.13.7 to 8.13.11. ([\#15590](https://github.com/matrix-org/synapse/issues/15590))
-- Bump types-psycopg2 from 2.9.21.9 to 2.9.21.10. ([\#15591](https://github.com/matrix-org/synapse/issues/15591))
-- Bump types-commonmark from 0.9.2.2 to 0.9.2.3. ([\#15592](https://github.com/matrix-org/synapse/issues/15592))
-- Bump types-setuptools from 67.7.0.1 to 67.7.0.2. ([\#15594](https://github.com/matrix-org/synapse/issues/15594))
-
-
-Synapse 1.83.0 (2023-05-09)
-===========================
-
-No significant changes since 1.83.0rc1.
-
-
-Synapse 1.83.0rc1 (2023-05-02)
-==============================
-
-Features
---------
-
-- Experimental support to recursively provide relations per [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981). ([\#15315](https://github.com/matrix-org/synapse/issues/15315))
-- Experimental support for [MSC3970](https://github.com/matrix-org/matrix-spec-proposals/pull/3970): Scope transaction IDs to devices. ([\#15318](https://github.com/matrix-org/synapse/issues/15318))
-- Add an [admin API endpoint](https://matrix-org.github.io/synapse/v1.83/admin_api/experimental_features.html) to support per-user feature flags. ([\#15344](https://github.com/matrix-org/synapse/issues/15344))
-- Add a module API to send an HTTP push notification. ([\#15387](https://github.com/matrix-org/synapse/issues/15387))
-- Add an [admin API endpoint](https://matrix-org.github.io/synapse/v1.83/admin_api/statistics.html#get-largest-rooms-by-size-in-database) to query the largest rooms by disk space used in the database. ([\#15482](https://github.com/matrix-org/synapse/issues/15482))
-
-
-Bugfixes
---------
-
-- Disable push rule evaluation for rooms excluded from sync. ([\#15361](https://github.com/matrix-org/synapse/issues/15361))
-- Fix a long-standing bug where cached server key results which were directly fetched would not be properly re-used. ([\#15417](https://github.com/matrix-org/synapse/issues/15417))
-- Fix a bug introduced in Synapse 1.73.0 where some experimental push rules were returned by default. ([\#15494](https://github.com/matrix-org/synapse/issues/15494))
-
-
-Improved Documentation
-----------------------
-
-- Add Nginx loadbalancing example with sticky mxid for workers. ([\#15411](https://github.com/matrix-org/synapse/issues/15411))
-- Update outdated development docs that mention restrictions in versions of SQLite that we no longer support. ([\#15498](https://github.com/matrix-org/synapse/issues/15498))
-
-
-Internal Changes
-----------------
-
-- Speedup tests by caching HomeServerConfig instances. ([\#15284](https://github.com/matrix-org/synapse/issues/15284))
-- Add denormalised event stream ordering column to membership state tables for future use. Contributed by Nick @ Beeper (@fizzadar). ([\#15356](https://github.com/matrix-org/synapse/issues/15356))
-- Always use multi-user device resync replication endpoints. ([\#15418](https://github.com/matrix-org/synapse/issues/15418))
-- Add column `full_user_id` to tables `profiles` and `user_filters`. ([\#15458](https://github.com/matrix-org/synapse/issues/15458))
-- Update support for [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983) to allow always returning fallback-keys in a `/keys/claim` request. ([\#15462](https://github.com/matrix-org/synapse/issues/15462))
-- Improve type hints. ([\#15465](https://github.com/matrix-org/synapse/issues/15465), [\#15496](https://github.com/matrix-org/synapse/issues/15496), [\#15497](https://github.com/matrix-org/synapse/issues/15497))
-- Support claiming more than one OTK at a time. ([\#15468](https://github.com/matrix-org/synapse/issues/15468))
-- Bump types-pyyaml from 6.0.12.8 to 6.0.12.9. ([\#15471](https://github.com/matrix-org/synapse/issues/15471))
-- Bump pyasn1-modules from 0.2.8 to 0.3.0. ([\#15473](https://github.com/matrix-org/synapse/issues/15473))
-- Bump cryptography from 40.0.1 to 40.0.2. ([\#15474](https://github.com/matrix-org/synapse/issues/15474))
-- Bump types-netaddr from 0.8.0.7 to 0.8.0.8. ([\#15475](https://github.com/matrix-org/synapse/issues/15475))
-- Bump types-jsonschema from 4.17.0.6 to 4.17.0.7. ([\#15476](https://github.com/matrix-org/synapse/issues/15476))
-- Ask bug reporters to provide logs as text. ([\#15479](https://github.com/matrix-org/synapse/issues/15479))
-- Add a Nix flake for use as a development environment. ([\#15495](https://github.com/matrix-org/synapse/issues/15495))
-- Bump anyhow from 1.0.70 to 1.0.71. ([\#15507](https://github.com/matrix-org/synapse/issues/15507))
-- Bump types-pillow from 9.4.0.19 to 9.5.0.2. ([\#15508](https://github.com/matrix-org/synapse/issues/15508))
-- Bump packaging from 23.0 to 23.1. ([\#15510](https://github.com/matrix-org/synapse/issues/15510))
-- Bump types-requests from 2.28.11.16 to 2.29.0.0. ([\#15511](https://github.com/matrix-org/synapse/issues/15511))
-- Bump setuptools-rust from 1.5.2 to 1.6.0. ([\#15512](https://github.com/matrix-org/synapse/issues/15512))
-- Update the check_schema_delta script to account for when the schema version has been bumped locally. ([\#15466](https://github.com/matrix-org/synapse/issues/15466))
-
-
-Synapse 1.82.0 (2023-04-25)
-===========================
-
-No significant changes since 1.82.0rc1.
-
-
-Synapse 1.82.0rc1 (2023-04-18)
-==============================
-
-Features
---------
-
-- Allow loading the `/directory/room/{roomAlias}` endpoint on workers. ([\#15333](https://github.com/matrix-org/synapse/issues/15333))
-- Add some validation to `instance_map` configuration loading. ([\#15431](https://github.com/matrix-org/synapse/issues/15431))
-- Allow loading the `/capabilities` endpoint on workers. ([\#15436](https://github.com/matrix-org/synapse/issues/15436))
-
-
-Bugfixes
---------
-
-- Delete server-side backup keys when deactivating an account. ([\#15181](https://github.com/matrix-org/synapse/issues/15181))
-- Fix and document untold assumption that `on_logged_out` module hooks will be called before the deletion of pushers. ([\#15410](https://github.com/matrix-org/synapse/issues/15410))
-- Improve robustness when handling a perspective key response by deduplicating received server keys. ([\#15423](https://github.com/matrix-org/synapse/issues/15423))
-- Synapse now correctly fails to start if the config option `app_service_config_files` is not a list. ([\#15425](https://github.com/matrix-org/synapse/issues/15425))
-- Disable loading `RefreshTokenServlet` (`/_matrix/client/(r0|v3|unstable)/refresh`) on workers. ([\#15428](https://github.com/matrix-org/synapse/issues/15428))
-
-
-Improved Documentation
-----------------------
-
-- Note that the `delete_stale_devices_after` background job always runs on the main process. ([\#15452](https://github.com/matrix-org/synapse/issues/15452))
-
-
-Deprecations and Removals
--------------------------
-
-- Remove the broken, unspecced registration fallback. Note that the *login* fallback is unaffected by this change. ([\#15405](https://github.com/matrix-org/synapse/issues/15405))
-
-
-Internal Changes
-----------------
-
-- Bump black from 23.1.0 to 23.3.0. ([\#15372](https://github.com/matrix-org/synapse/issues/15372))
-- Bump pyopenssl from 23.1.0 to 23.1.1. ([\#15373](https://github.com/matrix-org/synapse/issues/15373))
-- Bump types-psycopg2 from 2.9.21.8 to 2.9.21.9. ([\#15374](https://github.com/matrix-org/synapse/issues/15374))
-- Bump types-netaddr from 0.8.0.6 to 0.8.0.7. ([\#15375](https://github.com/matrix-org/synapse/issues/15375))
-- Bump types-opentracing from 2.4.10.3 to 2.4.10.4. ([\#15376](https://github.com/matrix-org/synapse/issues/15376))
-- Bump dawidd6/action-download-artifact from 2.26.0 to 2.26.1. ([\#15404](https://github.com/matrix-org/synapse/issues/15404))
-- Bump parameterized from 0.8.1 to 0.9.0. ([\#15412](https://github.com/matrix-org/synapse/issues/15412))
-- Bump types-pillow from 9.4.0.17 to 9.4.0.19. ([\#15413](https://github.com/matrix-org/synapse/issues/15413))
-- Bump sentry-sdk from 1.17.0 to 1.19.1. ([\#15414](https://github.com/matrix-org/synapse/issues/15414))
-- Bump immutabledict from 2.2.3 to 2.2.4. ([\#15415](https://github.com/matrix-org/synapse/issues/15415))
-- Bump dawidd6/action-download-artifact from 2.26.1 to 2.27.0. ([\#15441](https://github.com/matrix-org/synapse/issues/15441))
-- Bump serde_json from 1.0.95 to 1.0.96. ([\#15442](https://github.com/matrix-org/synapse/issues/15442))
-- Bump serde from 1.0.159 to 1.0.160. ([\#15443](https://github.com/matrix-org/synapse/issues/15443))
-- Bump pillow from 9.4.0 to 9.5.0. ([\#15444](https://github.com/matrix-org/synapse/issues/15444))
-- Bump furo from 2023.3.23 to 2023.3.27. ([\#15445](https://github.com/matrix-org/synapse/issues/15445))
-- Bump types-pyopenssl from 23.1.0.0 to 23.1.0.2. ([\#15446](https://github.com/matrix-org/synapse/issues/15446))
-- Bump mypy from 1.0.0 to 1.0.1. ([\#15447](https://github.com/matrix-org/synapse/issues/15447))
-- Bump psycopg2 from 2.9.5 to 2.9.6. ([\#15448](https://github.com/matrix-org/synapse/issues/15448))
-- Improve DB performance of clearing out old data from `stream_ordering_to_exterm`. ([\#15382](https://github.com/matrix-org/synapse/issues/15382), [\#15429](https://github.com/matrix-org/synapse/issues/15429))
-- Implement [MSC3989](https://github.com/matrix-org/matrix-spec-proposals/pull/3989) redaction algorithm. ([\#15393](https://github.com/matrix-org/synapse/issues/15393))
-- Implement [MSC2175](https://github.com/matrix-org/matrix-doc/pull/2175) to stop adding `creator` to create events. ([\#15394](https://github.com/matrix-org/synapse/issues/15394))
-- Implement [MSC2174](https://github.com/matrix-org/matrix-spec-proposals/pull/2174) to move the `redacts` key to a `content` property. ([\#15395](https://github.com/matrix-org/synapse/issues/15395))
-- Trust dtonlay/rust-toolchain in CI. ([\#15406](https://github.com/matrix-org/synapse/issues/15406))
-- Explicitly install Synapse during typechecking in CI. ([\#15409](https://github.com/matrix-org/synapse/issues/15409))
-- Only load the SSO redirect servlet if SSO is enabled. ([\#15421](https://github.com/matrix-org/synapse/issues/15421))
-- Refactor `SimpleHttpClient` to pull out a base class. ([\#15427](https://github.com/matrix-org/synapse/issues/15427))
-- Improve type hints. ([\#15432](https://github.com/matrix-org/synapse/issues/15432))
-- Convert async to normal tests in `TestSSOHandler`. ([\#15433](https://github.com/matrix-org/synapse/issues/15433))
-- Speed up the user directory background update. ([\#15435](https://github.com/matrix-org/synapse/issues/15435))
-- Disable directory listing for static resources in `/_matrix/static/`. ([\#15438](https://github.com/matrix-org/synapse/issues/15438))
-- Move various module API callback registration methods to a dedicated class. ([\#15453](https://github.com/matrix-org/synapse/issues/15453))
-
-
-Synapse 1.81.0 (2023-04-11)
-===========================
-
-Synapse now attempts the versioned appservice paths before falling back to the
-[legacy paths](https://spec.matrix.org/v1.6/application-service-api/#legacy-routes).
-Usage of the legacy routes should be considered deprecated.
-
-Additionally, Synapse has supported sending the application service access token
-via [the `Authorization` header](https://spec.matrix.org/v1.6/application-service-api/#authorization)
-since v1.70.0. For backwards compatibility it is *also* sent as the `access_token`
-query parameter. This is insecure and should be considered deprecated.
-
-A future version of Synapse (v1.88.0 or later) will remove support for legacy
-application service routes and query parameter authorization.
-
-
-No significant changes since 1.81.0rc2.
-
-
-Synapse 1.81.0rc2 (2023-04-06)
-==============================
-
-Bugfixes
---------
-
-- Fix the `set_device_id_for_pushers_txn` background update crash. ([\#15391](https://github.com/matrix-org/synapse/issues/15391))
-
-
-Internal Changes
-----------------
-
-- Update CI to run complement under the latest stable go version. ([\#15403](https://github.com/matrix-org/synapse/issues/15403))
-
-
-Synapse 1.81.0rc1 (2023-04-04)
-==============================
-
-Features
---------
-
-- Add the ability to enable/disable registrations when in the OIDC flow. ([\#14978](https://github.com/matrix-org/synapse/issues/14978))
-- Add a primitive helper script for listing worker endpoints. ([\#15243](https://github.com/matrix-org/synapse/issues/15243))
-- Experimental support for passing One Time Key and device key requests to application services ([MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983) and [MSC3984](https://github.com/matrix-org/matrix-spec-proposals/pull/3984)). ([\#15314](https://github.com/matrix-org/synapse/issues/15314), [\#15321](https://github.com/matrix-org/synapse/issues/15321))
-- Allow loading `/password_policy` endpoint on workers. ([\#15331](https://github.com/matrix-org/synapse/issues/15331))
-- Add experimental support for Unix sockets. Contributed by Jason Little. ([\#15353](https://github.com/matrix-org/synapse/issues/15353))
-- Build Debian packages for Ubuntu 23.04 (Lunar Lobster). ([\#15381](https://github.com/matrix-org/synapse/issues/15381))
-
-
-Bugfixes
---------
-
-- Fix a long-standing bug where edits of non-`m.room.message` events would not be correctly bundled. ([\#15295](https://github.com/matrix-org/synapse/issues/15295))
-- Fix a bug introduced in Synapse v1.55.0 which could delay remote homeservers being able to decrypt encrypted messages sent by local users. ([\#15297](https://github.com/matrix-org/synapse/issues/15297))
-- Add a check to [SQLite port_db script](https://matrix-org.github.io/synapse/latest/postgres.html#porting-from-sqlite)
-  to ensure that the sqlite database passed to the script exists before trying to port from it. ([\#15306](https://github.com/matrix-org/synapse/issues/15306))
-- Fix a bug introduced in Synapse 1.76.0 where responses from worker deployments could include an internal `_INT_STREAM_POS` key. ([\#15309](https://github.com/matrix-org/synapse/issues/15309))
-- Fix a long-standing bug that Synpase only used the [legacy appservice routes](https://spec.matrix.org/v1.6/application-service-api/#legacy-routes). ([\#15317](https://github.com/matrix-org/synapse/issues/15317))
-- Fix a long-standing bug preventing users from rejoining rooms after being banned and unbanned over federation. Contributed by Nico. ([\#15323](https://github.com/matrix-org/synapse/issues/15323))
-- Fix bug in worker mode where on a rolling restart of workers the "typing" worker would consume 100% CPU until it got restarted. ([\#15332](https://github.com/matrix-org/synapse/issues/15332))
-- Fix a long-standing bug where some to_device messages could be dropped when using workers. ([\#15349](https://github.com/matrix-org/synapse/issues/15349))
-- Fix a bug introduced in Synapse 1.70.0 where the background sync from a faster join could spin for hours when one of the events involved had been marked for backoff. ([\#15351](https://github.com/matrix-org/synapse/issues/15351))
-- Fix missing app variable in mail subject for password resets. Contributed by Cyberes. ([\#15352](https://github.com/matrix-org/synapse/issues/15352))
-- Fix a rare bug introduced in Synapse 1.66.0 where initial syncs would fail when the user had been kicked from a faster joined room that had not finished syncing. ([\#15383](https://github.com/matrix-org/synapse/issues/15383))
-
-
-Improved Documentation
-----------------------
-
-- Fix a typo in login requests ratelimit defaults. ([\#15341](https://github.com/matrix-org/synapse/issues/15341))
-- Add some clarification to the doc/comments regarding TCP replication. ([\#15354](https://github.com/matrix-org/synapse/issues/15354))
-- Note that Synapse 1.74 queued a rebuild of the user directory tables. ([\#15386](https://github.com/matrix-org/synapse/issues/15386))
-
-
-Internal Changes
-----------------
-
-- Use `immutabledict` instead of `frozendict`. ([\#15113](https://github.com/matrix-org/synapse/issues/15113))
-- Add developer documentation for the Federation Sender and add a documentation mechanism using Sphinx. ([\#15265](https://github.com/matrix-org/synapse/issues/15265), [\#15336](https://github.com/matrix-org/synapse/issues/15336))
-- Make the pushers rely on the `device_id` instead of the `access_token_id` for various operations. ([\#15280](https://github.com/matrix-org/synapse/issues/15280))
-- Bump sentry-sdk from 1.15.0 to 1.17.0. ([\#15285](https://github.com/matrix-org/synapse/issues/15285))
-- Allow running the Twisted trunk job against other branches. ([\#15302](https://github.com/matrix-org/synapse/issues/15302))
-- Remind the releaser to ask for changelog feedback in [#synapse-dev](https://matrix.to/#/#synapse-dev:matrix.org). ([\#15303](https://github.com/matrix-org/synapse/issues/15303))
-- Bump dtolnay/rust-toolchain from e12eda571dc9a5ee5d58eecf4738ec291c66f295 to fc3253060d0c959bea12a59f10f8391454a0b02d. ([\#15304](https://github.com/matrix-org/synapse/issues/15304))
-- Reject events with an invalid "mentions" property per [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952). ([\#15311](https://github.com/matrix-org/synapse/issues/15311))
-- As an optimisation, use `TRUNCATE` on Postgres when clearing the user directory tables. ([\#15316](https://github.com/matrix-org/synapse/issues/15316))
-- Fix `.gitignore` rule for the Complement source tarball downloaded automatically by `complement.sh`. ([\#15319](https://github.com/matrix-org/synapse/issues/15319))
-- Bump serde from 1.0.157 to 1.0.158. ([\#15324](https://github.com/matrix-org/synapse/issues/15324))
-- Bump regex from 1.7.1 to 1.7.3. ([\#15325](https://github.com/matrix-org/synapse/issues/15325))
-- Bump types-pyopenssl from 23.0.0.4 to 23.1.0.0. ([\#15326](https://github.com/matrix-org/synapse/issues/15326))
-- Bump furo from 2022.12.7 to 2023.3.23. ([\#15327](https://github.com/matrix-org/synapse/issues/15327))
-- Bump ruff from 0.0.252 to 0.0.259. ([\#15328](https://github.com/matrix-org/synapse/issues/15328))
-- Bump cryptography from 40.0.0 to 40.0.1. ([\#15329](https://github.com/matrix-org/synapse/issues/15329))
-- Bump mypy-zope from 0.9.0 to 0.9.1. ([\#15330](https://github.com/matrix-org/synapse/issues/15330))
-- Speed up unit tests when using SQLite3. ([\#15334](https://github.com/matrix-org/synapse/issues/15334))
-- Speed up pydantic CI job. ([\#15339](https://github.com/matrix-org/synapse/issues/15339))
-- Speed up sample config CI job. ([\#15340](https://github.com/matrix-org/synapse/issues/15340))
-- Fix copyright year in SSO footer template. ([\#15358](https://github.com/matrix-org/synapse/issues/15358))
-- Bump peaceiris/actions-gh-pages from 3.9.2 to 3.9.3. ([\#15369](https://github.com/matrix-org/synapse/issues/15369))
-- Bump serde from 1.0.158 to 1.0.159. ([\#15370](https://github.com/matrix-org/synapse/issues/15370))
-- Bump serde_json from 1.0.94 to 1.0.95. ([\#15371](https://github.com/matrix-org/synapse/issues/15371))
-- Speed up membership queries for users with forgotten rooms. ([\#15385](https://github.com/matrix-org/synapse/issues/15385))
-
-
-Synapse 1.80.0 (2023-03-28)
-===========================
-
-No significant changes since 1.80.0rc2.
-
-
-Synapse 1.80.0rc2 (2023-03-22)
-==============================
-
-Bugfixes
---------
-
-- Fix a bug in which the [`POST /_matrix/client/v3/rooms/{roomId}/report/{eventId}`](https://spec.matrix.org/v1.6/client-server-api/#post_matrixclientv3roomsroomidreporteventid) endpoint would return the wrong error if the user did not have permission to view the event. This aligns Synapse's implementation with [MSC2249](https://github.com/matrix-org/matrix-spec-proposals/pull/2249). ([\#15298](https://github.com/matrix-org/synapse/issues/15298), [\#15300](https://github.com/matrix-org/synapse/issues/15300))
-- Fix a bug introduced in Synapse 1.75.0rc1 where the [SQLite port_db script](https://matrix-org.github.io/synapse/latest/postgres.html#porting-from-sqlite)
-  would fail to open the SQLite database. ([\#15301](https://github.com/matrix-org/synapse/issues/15301))
-
-
-Synapse 1.80.0rc1 (2023-03-21)
-==============================
-
-Features
---------
-
-- Stabilise support for [MSC3966](https://github.com/matrix-org/matrix-spec-proposals/pull/3966): `event_property_contains` push condition. ([\#15187](https://github.com/matrix-org/synapse/issues/15187))
-- Implement [MSC2659](https://github.com/matrix-org/matrix-spec-proposals/pull/2659): application service ping endpoint. Contributed by Tulir @ Beeper. ([\#15249](https://github.com/matrix-org/synapse/issues/15249))
-- Allow loading `/register/available` endpoint on workers. ([\#15268](https://github.com/matrix-org/synapse/issues/15268))
-- Improve performance of creating and authenticating events. ([\#15195](https://github.com/matrix-org/synapse/issues/15195))
-- Add topic and name events to group of events that are batch persisted when creating a room. ([\#15229](https://github.com/matrix-org/synapse/issues/15229))
-
-
-Bugfixes
---------
-
-- Fix a long-standing bug in which the user directory would assume any remote membership state events represent a profile change. ([\#14755](https://github.com/matrix-org/synapse/issues/14755), [\#14756](https://github.com/matrix-org/synapse/issues/14756))
-- Implement [MSC3873](https://github.com/matrix-org/matrix-spec-proposals/pull/3873) to fix a long-standing bug where properties with dots were handled ambiguously in push rules. ([\#15190](https://github.com/matrix-org/synapse/issues/15190))
-- Faster joins: Fix a bug introduced in Synapse 1.66 where spurious "Failed to find memberships ..." errors would be logged. ([\#15232](https://github.com/matrix-org/synapse/issues/15232))
-- Fix a long-standing error when sending message into deleted room. ([\#15235](https://github.com/matrix-org/synapse/issues/15235))
-
-
-Updates to the Docker image
----------------------------
-
-- Ensure the Dockerfile builds on platforms that don't have a `cryptography` wheel. ([\#15239](https://github.com/matrix-org/synapse/issues/15239))
-- Mirror images to the GitHub Container Registry (`ghcr.io/matrix-org/synapse`). ([\#15281](https://github.com/matrix-org/synapse/issues/15281), [\#15282](https://github.com/matrix-org/synapse/issues/15282))
-
-
-Improved Documentation
-----------------------
-
-- Add a missing endpoint to the workers documentation. ([\#15223](https://github.com/matrix-org/synapse/issues/15223))
-
-
-Internal Changes
-----------------
-
-- Add additional functionality to declaring worker types when starting Complement in worker mode. ([\#14921](https://github.com/matrix-org/synapse/issues/14921))
-- Add `Synapse-Trace-Id` to `access-control-expose-headers` header. ([\#14974](https://github.com/matrix-org/synapse/issues/14974))
-- Make the `HttpTransactionCache` use the `Requester` in addition of the just the `Request` to build the transaction key. ([\#15200](https://github.com/matrix-org/synapse/issues/15200))
-- Improve log lines when purging rooms. ([\#15222](https://github.com/matrix-org/synapse/issues/15222))
-- Improve type hints. ([\#15230](https://github.com/matrix-org/synapse/issues/15230), [\#15231](https://github.com/matrix-org/synapse/issues/15231), [\#15238](https://github.com/matrix-org/synapse/issues/15238))
-- Move various module API callback registration methods to a dedicated class. ([\#15237](https://github.com/matrix-org/synapse/issues/15237))
-- Configure GitHub Actions for merge queues. ([\#15244](https://github.com/matrix-org/synapse/issues/15244))
-- Add schema comments about the `destinations` and `destination_rooms` tables. ([\#15247](https://github.com/matrix-org/synapse/issues/15247))
-- Skip processing of auto-join room behaviour if there are no auto-join rooms configured. ([\#15262](https://github.com/matrix-org/synapse/issues/15262))
-- Remove unused store method `_set_destination_retry_timings_emulated`. ([\#15266](https://github.com/matrix-org/synapse/issues/15266))
-- Reorganize URL preview code. ([\#15269](https://github.com/matrix-org/synapse/issues/15269))
-- Clean-up direct TCP replication code. ([\#15272](https://github.com/matrix-org/synapse/issues/15272), [\#15274](https://github.com/matrix-org/synapse/issues/15274))
-- Make `configure_workers_and_start` script used in Complement tests compatible with older versions of Python. ([\#15275](https://github.com/matrix-org/synapse/issues/15275))
-- Add a `/versions` flag for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952). ([\#15293](https://github.com/matrix-org/synapse/issues/15293))
-- Bump hiredis from 2.2.1 to 2.2.2. ([\#15252](https://github.com/matrix-org/synapse/issues/15252))
-- Bump serde from 1.0.152 to 1.0.155. ([\#15253](https://github.com/matrix-org/synapse/issues/15253))
-- Bump pysaml2 from 7.2.1 to 7.3.1. ([\#15254](https://github.com/matrix-org/synapse/issues/15254))
-- Bump msgpack from 1.0.4 to 1.0.5. ([\#15255](https://github.com/matrix-org/synapse/issues/15255))
-- Bump gitpython from 3.1.30 to 3.1.31. ([\#15256](https://github.com/matrix-org/synapse/issues/15256))
-- Bump cryptography from 39.0.1 to 39.0.2. ([\#15257](https://github.com/matrix-org/synapse/issues/15257))
-- Bump pydantic from 1.10.4 to 1.10.6. ([\#15286](https://github.com/matrix-org/synapse/issues/15286))
-- Bump serde from 1.0.155 to 1.0.157. ([\#15287](https://github.com/matrix-org/synapse/issues/15287))
-- Bump anyhow from 1.0.69 to 1.0.70. ([\#15288](https://github.com/matrix-org/synapse/issues/15288))
-- Bump txredisapi from 1.4.7 to 1.4.9. ([\#15289](https://github.com/matrix-org/synapse/issues/15289))
-- Bump pygithub from 1.57 to 1.58.1. ([\#15290](https://github.com/matrix-org/synapse/issues/15290))
-- Bump types-requests from 2.28.11.12 to 2.28.11.15. ([\#15291](https://github.com/matrix-org/synapse/issues/15291))
-
-
-
-Synapse 1.79.0 (2023-03-14)
-===========================
-
-No significant changes since 1.79.0rc2.
-
-
-Synapse 1.79.0rc2 (2023-03-13)
-==============================
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse 1.79.0rc1 where attempting to register a `on_remove_user_third_party_identifier` module API callback would be a no-op. ([\#15227](https://github.com/matrix-org/synapse/issues/15227))
-- Fix a rare bug introduced in Synapse 1.73 where events could remain unsent to other homeservers after a faster-join to a room. ([\#15248](https://github.com/matrix-org/synapse/issues/15248))
-
-
-Internal Changes
-----------------
-
-- Refactor `filter_events_for_server`. ([\#15240](https://github.com/matrix-org/synapse/issues/15240))
-
-
-Synapse 1.79.0rc1 (2023-03-07)
-==============================
-
-Features
---------
-
-- Add two new Third Party Rules module API callbacks: [`on_add_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_add_user_third_party_identifier) and [`on_remove_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_remove_user_third_party_identifier). ([\#15044](https://github.com/matrix-org/synapse/issues/15044))
-- Experimental support for [MSC3967](https://github.com/matrix-org/matrix-spec-proposals/pull/3967) to not require UIA for setting up cross-signing on first use. ([\#15077](https://github.com/matrix-org/synapse/issues/15077))
-- Add media information to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.79/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#15107](https://github.com/matrix-org/synapse/issues/15107))
-- Add an [admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) to delete a [specific event report](https://spec.matrix.org/v1.6/client-server-api/#reporting-content). ([\#15116](https://github.com/matrix-org/synapse/issues/15116))
-- Add support for knocking to workers. ([\#15133](https://github.com/matrix-org/synapse/issues/15133))
-- Allow use of the `/filter` Client-Server APIs on workers. ([\#15134](https://github.com/matrix-org/synapse/issues/15134))
-- Update support for [MSC2677](https://github.com/matrix-org/matrix-spec-proposals/pull/2677): remove support for server-side aggregation of reactions. ([\#15172](https://github.com/matrix-org/synapse/issues/15172))
-- Stabilise support for [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758): `event_property_is` push condition. ([\#15185](https://github.com/matrix-org/synapse/issues/15185))
-
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse 1.75 that caused experimental support for deleting account data to raise an internal server error while using an account data writer worker. ([\#14869](https://github.com/matrix-org/synapse/issues/14869))
-- Fix a long-standing bug where Synapse handled an unspecced field on push rules. ([\#15088](https://github.com/matrix-org/synapse/issues/15088))
-- Fix a long-standing bug where a URL preview would break if the discovered oEmbed failed to download. ([\#15092](https://github.com/matrix-org/synapse/issues/15092))
-- Fix a long-standing bug where an initial sync would not respond to changes to the list of ignored users if there was an initial sync cached. ([\#15163](https://github.com/matrix-org/synapse/issues/15163))
-- Add the `transaction_id` in the events included in many endpoints' responses. ([\#15174](https://github.com/matrix-org/synapse/issues/15174))
-- Fix a bug introduced in Synapse 1.78.0 where requests to claim dehydrated devices would fail with a `405` error. ([\#15180](https://github.com/matrix-org/synapse/issues/15180))
-- Stop applying edits when bundling aggregations, per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925). ([\#15193](https://github.com/matrix-org/synapse/issues/15193))
-- Fix a long-standing bug where the user directory search was not case-insensitive for accented characters. ([\#15143](https://github.com/matrix-org/synapse/issues/15143))
-
-
-Updates to the Docker image
----------------------------
-
-- Improve startup logging in the with-workers Docker image. ([\#15186](https://github.com/matrix-org/synapse/issues/15186))
-
-
-Improved Documentation
-----------------------
-
-- Document how to use caches in a module. ([\#14026](https://github.com/matrix-org/synapse/issues/14026))
-- Clarify which worker processes the ThirdPartyRules' [`on_new_event`](https://matrix-org.github.io/synapse/v1.78/modules/third_party_rules_callbacks.html#on_new_event) module API callback runs on. ([\#15071](https://github.com/matrix-org/synapse/issues/15071))
-- Document using [Shibboleth](https://www.shibboleth.net/) as an OpenID Provider. ([\#15112](https://github.com/matrix-org/synapse/issues/15112))
-- Correct reference to `federation_verify_certificates` in configuration documentation. ([\#15139](https://github.com/matrix-org/synapse/issues/15139))
-- Correct small documentation errors in some `MatrixFederationHttpClient` methods. ([\#15148](https://github.com/matrix-org/synapse/issues/15148))
-- Correct the description of the behavior of `registration_shared_secret_path` on startup. ([\#15168](https://github.com/matrix-org/synapse/issues/15168))
-
-
-Deprecations and Removals
--------------------------
-
-- Deprecate the `on_threepid_bind` module callback, to be replaced by [`on_add_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_add_user_third_party_identifier). See [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.79/docs/upgrade.md#upgrading-to-v1790). ([\#15044](https://github.com/matrix-org/synapse/issues/15044))
-- Remove the unspecced `room_alias` field from the [`/createRoom`](https://spec.matrix.org/v1.6/client-server-api/#post_matrixclientv3createroom) response. ([\#15093](https://github.com/matrix-org/synapse/issues/15093))
-- Remove the unspecced `PUT` on the `/knock/{roomIdOrAlias}` endpoint. ([\#15189](https://github.com/matrix-org/synapse/issues/15189))
-- Remove the undocumented and unspecced `type` parameter to the `/thumbnail` endpoint. ([\#15137](https://github.com/matrix-org/synapse/issues/15137))
-- Remove unspecced and buggy `PUT` method on the unstable `/rooms/<room_id>/batch_send` endpoint. ([\#15199](https://github.com/matrix-org/synapse/issues/15199))
-
-
-Internal Changes
-----------------
-
-- Run the integration test suites with the asyncio reactor enabled in CI. ([\#14101](https://github.com/matrix-org/synapse/issues/14101))
-- Batch up storing state groups when creating a new room. ([\#14918](https://github.com/matrix-org/synapse/issues/14918))
-- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15051](https://github.com/matrix-org/synapse/issues/15051))
-- Refactor writing json data in `FileExfiltrationWriter`. ([\#15095](https://github.com/matrix-org/synapse/issues/15095))
-- Tighten the login ratelimit defaults. ([\#15135](https://github.com/matrix-org/synapse/issues/15135))
-- Fix a typo in an experimental config setting. ([\#15138](https://github.com/matrix-org/synapse/issues/15138))
-- Refactor the media modules. ([\#15146](https://github.com/matrix-org/synapse/issues/15146), [\#15175](https://github.com/matrix-org/synapse/issues/15175))
-- Improve type hints. ([\#15164](https://github.com/matrix-org/synapse/issues/15164))
-- Move `get_event_report` and `get_event_reports_paginate` from `RoomStore` to `RoomWorkerStore`. ([\#15165](https://github.com/matrix-org/synapse/issues/15165))
-- Remove dangling reference to being a reference implementation in docstring. ([\#15167](https://github.com/matrix-org/synapse/issues/15167))
-- Add an option to force a rebuild of the "editable" complement image. ([\#15184](https://github.com/matrix-org/synapse/issues/15184))
-- Use nightly rustfmt in CI. ([\#15188](https://github.com/matrix-org/synapse/issues/15188))
-- Add a `get_next_txn` method to `StreamIdGenerator` to match `MultiWriterIdGenerator`. ([\#15191](https://github.com/matrix-org/synapse/issues/15191))
-- Combine `AbstractStreamIdTracker` and `AbstractStreamIdGenerator`. ([\#15192](https://github.com/matrix-org/synapse/issues/15192))
-- Automatically fix errors with `ruff`. ([\#15194](https://github.com/matrix-org/synapse/issues/15194))
-- Refactor database transaction for query users' devices to reduce database pool contention. ([\#15215](https://github.com/matrix-org/synapse/issues/15215))
-- Correct `test_icu_word_boundary_punctuation` so that it passes with the ICU versions available in Alpine and macOS. ([\#15177](https://github.com/matrix-org/synapse/issues/15177))
-
-<details><summary>Locked dependency updates</summary>
-
-  - Bump actions/checkout from 2 to 3. ([\#15155](https://github.com/matrix-org/synapse/issues/15155))
-  - Bump black from 22.12.0 to 23.1.0. ([\#15103](https://github.com/matrix-org/synapse/issues/15103))
-  - Bump dawidd6/action-download-artifact from 2.25.0 to 2.26.0. ([\#15152](https://github.com/matrix-org/synapse/issues/15152))
-  - Bump docker/login-action from 1 to 2. ([\#15154](https://github.com/matrix-org/synapse/issues/15154))
-  - Bump matrix-org/backend-meta from 1 to 2. ([\#15156](https://github.com/matrix-org/synapse/issues/15156))
-  - Bump ruff from 0.0.237 to 0.0.252. ([\#15159](https://github.com/matrix-org/synapse/issues/15159))
-  - Bump serde_json from 1.0.93 to 1.0.94. ([\#15214](https://github.com/matrix-org/synapse/issues/15214))
-  - Bump types-commonmark from 0.9.2.1 to 0.9.2.2. ([\#15209](https://github.com/matrix-org/synapse/issues/15209))
-  - Bump types-opentracing from 2.4.10.1 to 2.4.10.3. ([\#15158](https://github.com/matrix-org/synapse/issues/15158))
-  - Bump types-pillow from 9.4.0.13 to 9.4.0.17. ([\#15211](https://github.com/matrix-org/synapse/issues/15211))
-  - Bump types-psycopg2 from 2.9.21.4 to 2.9.21.8. ([\#15210](https://github.com/matrix-org/synapse/issues/15210))
-  - Bump types-pyopenssl from 22.1.0.2 to 23.0.0.4. ([\#15213](https://github.com/matrix-org/synapse/issues/15213))
-  - Bump types-setuptools from 67.3.0.1 to 67.4.0.3. ([\#15160](https://github.com/matrix-org/synapse/issues/15160))
-  - Bump types-setuptools from 67.4.0.3 to 67.5.0.0. ([\#15212](https://github.com/matrix-org/synapse/issues/15212))
-  - Bump typing-extensions from 4.4.0 to 4.5.0. ([\#15157](https://github.com/matrix-org/synapse/issues/15157))
-</details>
-
-
-Synapse 1.78.0 (2023-02-28)
-===========================
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse 1.76 where 5s delays would occasionally occur in deployments using workers. ([\#15150](https://github.com/matrix-org/synapse/issues/15150))
-
-
-Synapse 1.78.0rc1 (2023-02-21)
-==============================
-
-Features
---------
-
-- Implement the experimental `exact_event_match` push rule condition from [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758). ([\#14964](https://github.com/matrix-org/synapse/issues/14964))
-- Add account data to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.78/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14969](https://github.com/matrix-org/synapse/issues/14969))
-- Implement [MSC3873](https://github.com/matrix-org/matrix-spec-proposals/pull/3873) to disambiguate push rule keys with dots in them. ([\#15004](https://github.com/matrix-org/synapse/issues/15004))
-- Allow Synapse to use a specific Redis [logical database](https://redis.io/commands/select/) in worker-mode deployments. ([\#15034](https://github.com/matrix-org/synapse/issues/15034))
-- Tag opentracing spans for federation requests with the name of the worker serving the request. ([\#15042](https://github.com/matrix-org/synapse/issues/15042))
-- Implement the experimental `exact_event_property_contains` push rule condition from [MSC3966](https://github.com/matrix-org/matrix-spec-proposals/pull/3966). ([\#15045](https://github.com/matrix-org/synapse/issues/15045))
-- Remove spurious `dont_notify` action from the defaults for the `.m.rule.reaction` pushrule. ([\#15073](https://github.com/matrix-org/synapse/issues/15073))
-- Update the error code returned when user sends a duplicate annotation. ([\#15075](https://github.com/matrix-org/synapse/issues/15075))
-
-
-Bugfixes
---------
-
-- Prevent clients from reporting nonexistent events. ([\#13779](https://github.com/matrix-org/synapse/issues/13779))
-- Return spec-compliant JSON errors when unknown endpoints are requested. ([\#14605](https://github.com/matrix-org/synapse/issues/14605))
-- Fix a long-standing bug where the room aliases returned could be corrupted. ([\#15038](https://github.com/matrix-org/synapse/issues/15038))
-- Fix a bug introduced in Synapse 1.76.0 where partially-joined rooms could not be deleted using the [purge room API](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#delete-room-api). ([\#15068](https://github.com/matrix-org/synapse/issues/15068))
-- Fix a long-standing bug where federated joins would fail if the first server in the list of servers to try is not in the room. ([\#15074](https://github.com/matrix-org/synapse/issues/15074))
-- Fix a bug introduced in Synapse v1.74.0 where searching with colons when using ICU for search term tokenisation would fail with an error. ([\#15079](https://github.com/matrix-org/synapse/issues/15079))
-- Reduce the likelihood of a rare race condition where rejoining a restricted room over federation would fail. ([\#15080](https://github.com/matrix-org/synapse/issues/15080))
-- Fix a bug introduced in Synapse 1.76 where workers would fail to start if the `health` listener was configured. ([\#15096](https://github.com/matrix-org/synapse/issues/15096))
-- Fix a bug introduced in Synapse 1.75 where the [portdb script](https://matrix-org.github.io/synapse/release-v1.78/postgres.html#porting-from-sqlite) would fail to run after a room had been faster-joined. ([\#15108](https://github.com/matrix-org/synapse/issues/15108))
-
-
-Improved Documentation
-----------------------
-
-- Document how to start Synapse with Poetry. Contributed by @thezaidbintariq. ([\#14892](https://github.com/matrix-org/synapse/issues/14892), [\#15022](https://github.com/matrix-org/synapse/issues/15022))
-- Update delegation documentation to clarify that SRV DNS delegation does not eliminate all needs to serve files from .well-known locations. Contributed by @williamkray. ([\#14959](https://github.com/matrix-org/synapse/issues/14959))
-- Fix a mistake in registration_shared_secret_path docs. ([\#15078](https://github.com/matrix-org/synapse/issues/15078))
-- Refer to a more recent blog post on the [Database Maintenance Tools](https://matrix-org.github.io/synapse/latest/usage/administration/database_maintenance_tools.html) page. Contributed by @jahway603. ([\#15083](https://github.com/matrix-org/synapse/issues/15083))
-
-
-Internal Changes
-----------------
-
-- Re-type hint some collections as read-only. ([\#13755](https://github.com/matrix-org/synapse/issues/13755))
-- Faster joins: don't stall when another user joins during a partial-state room resync. ([\#14606](https://github.com/matrix-org/synapse/issues/14606))
-- Add a class `UnpersistedEventContext` to allow for the batching up of storing state groups. ([\#14675](https://github.com/matrix-org/synapse/issues/14675))
-- Add a check to ensure that locked dependencies have source distributions available. ([\#14742](https://github.com/matrix-org/synapse/issues/14742))
-- Tweak comment on `_is_local_room_accessible` as part of room visibility in `/hierarchy` to clarify the condition for a room being visible. ([\#14834](https://github.com/matrix-org/synapse/issues/14834))
-- Prevent `WARNING: there is already a transaction in progress` lines appearing in PostgreSQL's logs on some occasions. ([\#14840](https://github.com/matrix-org/synapse/issues/14840))
-- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14929](https://github.com/matrix-org/synapse/issues/14929))
-- Improve performance of `/sync` in a few situations. ([\#14973](https://github.com/matrix-org/synapse/issues/14973))
-- Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room. ([\#14977](https://github.com/matrix-org/synapse/issues/14977))
-- Skip calculating unread push actions in /sync when enable_push is false. ([\#14980](https://github.com/matrix-org/synapse/issues/14980))
-- Add a schema dump symlinks inside `contrib`, to make it easier for IDEs to interrogate Synapse's database schema. ([\#14982](https://github.com/matrix-org/synapse/issues/14982))
-- Improve type hints. ([\#15008](https://github.com/matrix-org/synapse/issues/15008), [\#15026](https://github.com/matrix-org/synapse/issues/15026), [\#15027](https://github.com/matrix-org/synapse/issues/15027), [\#15028](https://github.com/matrix-org/synapse/issues/15028), [\#15031](https://github.com/matrix-org/synapse/issues/15031), [\#15035](https://github.com/matrix-org/synapse/issues/15035), [\#15052](https://github.com/matrix-org/synapse/issues/15052), [\#15072](https://github.com/matrix-org/synapse/issues/15072), [\#15084](https://github.com/matrix-org/synapse/issues/15084))
-- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15037](https://github.com/matrix-org/synapse/issues/15037))
-- Avoid mutating a cached value in `get_user_devices_from_cache`. ([\#15040](https://github.com/matrix-org/synapse/issues/15040))
-- Fix a rare exception in logs on start up. ([\#15041](https://github.com/matrix-org/synapse/issues/15041))
-- Update pyo3-log to v0.8.1. ([\#15043](https://github.com/matrix-org/synapse/issues/15043))
-- Avoid mutating cached values in `_generate_sync_entry_for_account_data`. ([\#15047](https://github.com/matrix-org/synapse/issues/15047))
-- Refactor arguments of `try_unbind_threepid` and `_try_unbind_threepid_with_id_server` to not use dictionaries. ([\#15053](https://github.com/matrix-org/synapse/issues/15053))
-- Merge debug logging from the hotfixes branch. ([\#15054](https://github.com/matrix-org/synapse/issues/15054))
-- Faster joins: omit device list updates originating from partial state rooms in /sync responses without lazy loading of members enabled. ([\#15069](https://github.com/matrix-org/synapse/issues/15069))
-- Fix clashing database transaction name. ([\#15070](https://github.com/matrix-org/synapse/issues/15070))
-- Upper-bound frozendict dependency. This works around us being unable to test installing our wheels against Python 3.11 in CI. ([\#15114](https://github.com/matrix-org/synapse/issues/15114))
-- Tweak logging for when a worker waits for its view of a replication stream to catch up. ([\#15120](https://github.com/matrix-org/synapse/issues/15120))
-
-<details><summary>Locked dependency updates</summary>
-
-- Bump bleach from 5.0.1 to 6.0.0. ([\#15059](https://github.com/matrix-org/synapse/issues/15059))
-- Bump cryptography from 38.0.4 to 39.0.1. ([\#15020](https://github.com/matrix-org/synapse/issues/15020))
-- Bump ruff version from 0.0.230 to 0.0.237. ([\#15033](https://github.com/matrix-org/synapse/issues/15033))
-- Bump dtolnay/rust-toolchain from 9cd00a88a73addc8617065438eff914dd08d0955 to 25dc93b901a87e864900a8aec6c12e9aa794c0c3. ([\#15060](https://github.com/matrix-org/synapse/issues/15060))
-- Bump systemd-python from 234 to 235. ([\#15061](https://github.com/matrix-org/synapse/issues/15061))
-- Bump serde_json from 1.0.92 to 1.0.93. ([\#15062](https://github.com/matrix-org/synapse/issues/15062))
-- Bump types-requests from 2.28.11.8 to 2.28.11.12. ([\#15063](https://github.com/matrix-org/synapse/issues/15063))
-- Bump types-pillow from 9.4.0.5 to 9.4.0.10. ([\#15064](https://github.com/matrix-org/synapse/issues/15064))
-- Bump sentry-sdk from 1.13.0 to 1.15.0. ([\#15065](https://github.com/matrix-org/synapse/issues/15065))
-- Bump types-jsonschema from 4.17.0.3 to 4.17.0.5. ([\#15099](https://github.com/matrix-org/synapse/issues/15099))
-- Bump types-bleach from 5.0.3.1 to 6.0.0.0. ([\#15100](https://github.com/matrix-org/synapse/issues/15100))
-- Bump dtolnay/rust-toolchain from 25dc93b901a87e864900a8aec6c12e9aa794c0c3 to e12eda571dc9a5ee5d58eecf4738ec291c66f295. ([\#15101](https://github.com/matrix-org/synapse/issues/15101))
-- Bump dawidd6/action-download-artifact from 2.24.3 to 2.25.0. ([\#15102](https://github.com/matrix-org/synapse/issues/15102))
-- Bump types-pillow from 9.4.0.10 to 9.4.0.13. ([\#15104](https://github.com/matrix-org/synapse/issues/15104))
-- Bump types-setuptools from 67.1.0.0 to 67.3.0.1. ([\#15105](https://github.com/matrix-org/synapse/issues/15105))
-
-
-</details>
-
-
-Synapse 1.77.0 (2023-02-14)
-===========================
-
-No significant changes since 1.77.0rc2.
-
-
-Synapse 1.77.0rc2 (2023-02-10)
-==============================
-
-Bugfixes
---------
-
-- Fix bug where retried replication requests would return a failure. Introduced in v1.76.0. ([\#15024](https://github.com/matrix-org/synapse/issues/15024))
-
-
-Internal Changes
-----------------
-
-- Prepare for future database schema changes. ([\#15036](https://github.com/matrix-org/synapse/issues/15036))
-
-
-Synapse 1.77.0rc1 (2023-02-07)
-==============================
-
-Features
---------
-
-- Experimental support for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952): intentional mentions. ([\#14823](https://github.com/matrix-org/synapse/issues/14823), [\#14943](https://github.com/matrix-org/synapse/issues/14943), [\#14957](https://github.com/matrix-org/synapse/issues/14957), [\#14958](https://github.com/matrix-org/synapse/issues/14958))
-- Experimental support to suppress notifications from message edits ([MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958)). ([\#14960](https://github.com/matrix-org/synapse/issues/14960), [\#15016](https://github.com/matrix-org/synapse/issues/15016))
-- Add profile information, devices and connections to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.77/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14894](https://github.com/matrix-org/synapse/issues/14894))
-- Improve performance when joining or sending an event in large rooms. ([\#14962](https://github.com/matrix-org/synapse/issues/14962))
-- Improve performance of joining and leaving large rooms with many local users. ([\#14971](https://github.com/matrix-org/synapse/issues/14971))
-
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse 1.53.0 where `next_batch` tokens from `/sync` could not be used with the `/relations` endpoint. ([\#14866](https://github.com/matrix-org/synapse/issues/14866))
-- Fix a bug introduced in Synapse 1.35.0 where the module API's `send_local_online_presence_to` would fail to send presence updates over federation. ([\#14880](https://github.com/matrix-org/synapse/issues/14880))
-- Fix a bug introduced in Synapse 1.70.0 where the background updates to add non-thread unique indexes on receipts could fail when upgrading from 1.67.0 or earlier. ([\#14915](https://github.com/matrix-org/synapse/issues/14915))
-- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14926](https://github.com/matrix-org/synapse/issues/14926))
-- Fix a bug introduced in Synapse 1.68.0 where we were unable to service remote joins in rooms with `@room` notification levels set to `null` in their (malformed) power levels. ([\#14942](https://github.com/matrix-org/synapse/issues/14942))
-- Fix a bug introduced in Synapse 1.64.0 where boolean power levels were erroneously permitted in [v10 rooms](https://spec.matrix.org/v1.5/rooms/v10/). ([\#14944](https://github.com/matrix-org/synapse/issues/14944))
-- Fix a long-standing bug where sending messages on servers with presence enabled would spam "Re-starting finished log context" log lines. ([\#14947](https://github.com/matrix-org/synapse/issues/14947))
-- Fix a bug introduced in Synapse 1.68.0 where logging from the Rust module was not properly logged. ([\#14976](https://github.com/matrix-org/synapse/issues/14976))
-- Fix various long-standing bugs in Synapse's config, event and request handling where booleans were unintentionally accepted where an integer was expected. ([\#14945](https://github.com/matrix-org/synapse/issues/14945))
-
-
-Internal Changes
-----------------
-
-- Add missing type hints. ([\#14879](https://github.com/matrix-org/synapse/issues/14879), [\#14886](https://github.com/matrix-org/synapse/issues/14886), [\#14887](https://github.com/matrix-org/synapse/issues/14887), [\#14904](https://github.com/matrix-org/synapse/issues/14904), [\#14927](https://github.com/matrix-org/synapse/issues/14927), [\#14956](https://github.com/matrix-org/synapse/issues/14956), [\#14983](https://github.com/matrix-org/synapse/issues/14983), [\#14984](https://github.com/matrix-org/synapse/issues/14984), [\#14985](https://github.com/matrix-org/synapse/issues/14985), [\#14987](https://github.com/matrix-org/synapse/issues/14987), [\#14988](https://github.com/matrix-org/synapse/issues/14988), [\#14990](https://github.com/matrix-org/synapse/issues/14990), [\#14991](https://github.com/matrix-org/synapse/issues/14991), [\#14992](https://github.com/matrix-org/synapse/issues/14992), [\#15007](https://github.com/matrix-org/synapse/issues/15007))
-- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14922](https://github.com/matrix-org/synapse/issues/14922))
-- Allow running the complement tests suites with the asyncio reactor enabled. ([\#14858](https://github.com/matrix-org/synapse/issues/14858))
-- Improve performance of `/sync` in a few situations. ([\#14908](https://github.com/matrix-org/synapse/issues/14908), [\#14970](https://github.com/matrix-org/synapse/issues/14970))
-- Document how to handle Dependabot pull requests. ([\#14916](https://github.com/matrix-org/synapse/issues/14916))
-- Fix typo in release script. ([\#14920](https://github.com/matrix-org/synapse/issues/14920))
-- Update build system requirements to allow building with poetry-core 1.5.0. ([\#14949](https://github.com/matrix-org/synapse/issues/14949), [\#15019](https://github.com/matrix-org/synapse/issues/15019))
-- Add an [lnav](https://lnav.org) config file for Synapse logs to `/contrib/lnav`. ([\#14953](https://github.com/matrix-org/synapse/issues/14953))
-- Faster joins: Refactor internal handling of servers in room to never store an empty list. ([\#14954](https://github.com/matrix-org/synapse/issues/14954))
-- Faster joins: tag `v2/send_join/` requests to indicate if they served a partial join response. ([\#14950](https://github.com/matrix-org/synapse/issues/14950))
-- Allow running `cargo` without the `extension-module` option. ([\#14965](https://github.com/matrix-org/synapse/issues/14965))
-- Preparatory work for adding a denormalised event stream ordering column in the future. Contributed by Nick @ Beeper (@fizzadar). ([\#14979](https://github.com/matrix-org/synapse/issues/14979), [9cd7610](https://github.com/matrix-org/synapse/commit/9cd7610f86ab5051c9365dd38d1eec405a5f8ca6), [f10caa7](https://github.com/matrix-org/synapse/commit/f10caa73eee0caa91cf373966104d1ededae2aee); see [\#15014](https://github.com/matrix-org/synapse/issues/15014))
-- Add tests for `_flatten_dict`. ([\#14981](https://github.com/matrix-org/synapse/issues/14981), [\#15002](https://github.com/matrix-org/synapse/issues/15002))
-
-<details><summary>Locked dependency updates</summary>
-
-- Bump dtolnay/rust-toolchain from e645b0cf01249a964ec099494d38d2da0f0b349f to 9cd00a88a73addc8617065438eff914dd08d0955. ([\#14968](https://github.com/matrix-org/synapse/issues/14968))
-- Bump docker/build-push-action from 3 to 4. ([\#14952](https://github.com/matrix-org/synapse/issues/14952))
-- Bump ijson from 3.1.4 to 3.2.0.post0. ([\#14935](https://github.com/matrix-org/synapse/issues/14935))
-- Bump types-pyyaml from 6.0.12.2 to 6.0.12.3. ([\#14936](https://github.com/matrix-org/synapse/issues/14936))
-- Bump types-jsonschema from 4.17.0.2 to 4.17.0.3. ([\#14937](https://github.com/matrix-org/synapse/issues/14937))
-- Bump types-pillow from 9.4.0.3 to 9.4.0.5. ([\#14938](https://github.com/matrix-org/synapse/issues/14938))
-- Bump hiredis from 2.0.0 to 2.1.1. ([\#14939](https://github.com/matrix-org/synapse/issues/14939))
-- Bump hiredis from 2.1.1 to 2.2.1. ([\#14993](https://github.com/matrix-org/synapse/issues/14993))
-- Bump types-setuptools from 65.6.0.3 to 67.1.0.0. ([\#14994](https://github.com/matrix-org/synapse/issues/14994))
-- Bump prometheus-client from 0.15.0 to 0.16.0. ([\#14995](https://github.com/matrix-org/synapse/issues/14995))
-- Bump anyhow from 1.0.68 to 1.0.69. ([\#14996](https://github.com/matrix-org/synapse/issues/14996))
-- Bump serde_json from 1.0.91 to 1.0.92. ([\#14997](https://github.com/matrix-org/synapse/issues/14997))
-- Bump isort from 5.11.4 to 5.11.5. ([\#14998](https://github.com/matrix-org/synapse/issues/14998))
-- Bump phonenumbers from 8.13.4 to 8.13.5. ([\#14999](https://github.com/matrix-org/synapse/issues/14999))
-</details>
-
-Synapse 1.76.0 (2023-01-31)
-===========================
-
-The 1.76 release is the first to enable faster joins ([MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706) and [MSC3902](https://github.com/matrix-org/matrix-spec-proposals/pull/3902)) by default. Admins can opt-out: see [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#faster-joins-are-enabled-by-default) for more details.
-
-The upgrade from 1.75 to 1.76 changes the account data replication streams in a backwards-incompatible manner. Server operators running a multi-worker deployment should consult [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#changes-to-the-account-data-replication-streams).
-
-Those who are `poetry install`ing from source using our lockfile should ensure their poetry version is 1.3.2 or higher; [see upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#minimum-version-of-poetry-is-now-132).
-
-
-Notes on faster joins
----------------------
-
-The faster joins project sees the most benefit when joining a room with a large number of members (joined or historical). We expect it to be particularly useful for joining large public rooms like the [Matrix HQ](https://matrix.to/#/#matrix:matrix.org) or [Synapse Admins](https://matrix.to/#/#synapse:matrix.org) rooms.
-
-After a faster join, Synapse considers that room "partially joined". In this state, you should be able to
-
-- read incoming messages;
-- see incoming state changes, e.g. room topic changes; and
-- send messages, if the room is unencrypted.
-
-Synapse has to spend more effort to complete the join in the background. Once this finishes, you will be able to
-
-- send messages, if the room is in encrypted;
-- retrieve room history from before your join, if permitted by the room settings; and
-- access the full list of room members.
-
-
-Improved Documentation
-----------------------
-
-- Describe the ideas and the internal machinery behind faster joins. ([\#14677](https://github.com/matrix-org/synapse/issues/14677))
-
-
-Synapse 1.76.0rc2 (2023-01-27)
-==============================
-
-Bugfixes
---------
-
-- Faster joins: Fix a bug introduced in Synapse 1.69 where device list EDUs could fail to be handled after a restart when a faster join sync is in progress. ([\#14914](https://github.com/matrix-org/synapse/issues/14914))
-
-
-Internal Changes
-----------------
-
-- Faster joins: Improve performance of looking up partial-state status of rooms. ([\#14917](https://github.com/matrix-org/synapse/issues/14917))
-
-
-Synapse 1.76.0rc1 (2023-01-25)
-==============================
-
-Features
---------
-
-- Update the default room version to [v10](https://spec.matrix.org/v1.5/rooms/v10/) ([MSC 3904](https://github.com/matrix-org/matrix-spec-proposals/pull/3904)). Contributed by @FSG-Cat. ([\#14111](https://github.com/matrix-org/synapse/issues/14111))
-- Add a `set_displayname()` method to the module API for setting a user's display name. ([\#14629](https://github.com/matrix-org/synapse/issues/14629))
-- Add a dedicated listener configuration for `health` endpoint. ([\#14747](https://github.com/matrix-org/synapse/issues/14747))
-- Implement support for [MSC3890](https://github.com/matrix-org/matrix-spec-proposals/pull/3890): Remotely silence local notifications. ([\#14775](https://github.com/matrix-org/synapse/issues/14775))
-- Implement experimental support for [MSC3930](https://github.com/matrix-org/matrix-spec-proposals/pull/3930): Push rules for ([MSC3381](https://github.com/matrix-org/matrix-spec-proposals/pull/3381)) Polls. ([\#14787](https://github.com/matrix-org/synapse/issues/14787))
-- Per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925), bundle the whole of the replacement with any edited events, and optionally inhibit server-side replacement. ([\#14811](https://github.com/matrix-org/synapse/issues/14811))
-- Faster joins: always serve a partial join response to servers that request it with the stable query param. ([\#14839](https://github.com/matrix-org/synapse/issues/14839))
-- Faster joins: allow non-lazy-loading ("eager") syncs to complete after a partial join by omitting partial state rooms until they become fully stated. ([\#14870](https://github.com/matrix-org/synapse/issues/14870))
-- Faster joins: request partial joins by default. Admins can opt-out of this for the time being---see the upgrade notes. ([\#14905](https://github.com/matrix-org/synapse/issues/14905))
-
-
-Bugfixes
---------
-
-- Add index to improve performance of the `/timestamp_to_event` endpoint used for jumping to a specific date in the timeline of a room. ([\#14799](https://github.com/matrix-org/synapse/issues/14799))
-- Fix a long-standing bug where Synapse would exhaust the stack when processing many federation requests where the remote homeserver has disconencted early. ([\#14812](https://github.com/matrix-org/synapse/issues/14812), [\#14842](https://github.com/matrix-org/synapse/issues/14842))
-- Fix rare races when using workers. ([\#14820](https://github.com/matrix-org/synapse/issues/14820))
-- Fix a bug introduced in Synapse 1.64.0 when using room version 10 with frozen events enabled. ([\#14864](https://github.com/matrix-org/synapse/issues/14864))
-- Fix a long-standing bug where the `populate_room_stats` background job could fail on broken rooms. ([\#14873](https://github.com/matrix-org/synapse/issues/14873))
-- Faster joins: Fix a bug in worker deployments where the room stats and user directory would not get updated when finishing a fast join until another event is sent or received. ([\#14874](https://github.com/matrix-org/synapse/issues/14874))
-- Faster joins: Fix incompatibility with joins into restricted rooms where no local users have the ability to invite. ([\#14882](https://github.com/matrix-org/synapse/issues/14882))
-- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14910](https://github.com/matrix-org/synapse/issues/14910))
-
-
-Updates to the Docker image
----------------------------
-
-- Bump default Python version in the Dockerfile from 3.9 to 3.11. ([\#14875](https://github.com/matrix-org/synapse/issues/14875))
-
-
-Improved Documentation
-----------------------
-
-- Include `x_forwarded` entry in the HTTP listener example configs and remove the remaining `worker_main_http_uri` entries. ([\#14667](https://github.com/matrix-org/synapse/issues/14667))
-- Remove duplicate commands from the Code Style documentation page; point to the Contributing Guide instead. ([\#14773](https://github.com/matrix-org/synapse/issues/14773))
-- Add missing documentation for `tag` to `listeners` section. ([\#14803](https://github.com/matrix-org/synapse/issues/14803))
-- Updated documentation in configuration manual for `user_directory.search_all_users`. ([\#14818](https://github.com/matrix-org/synapse/issues/14818))
-- Add `worker_manhole` to configuration manual. ([\#14824](https://github.com/matrix-org/synapse/issues/14824))
-- Fix the example config missing the `id` field in [application service documentation](https://matrix-org.github.io/synapse/latest/application_services.html). ([\#14845](https://github.com/matrix-org/synapse/issues/14845))
-- Minor corrections to the logging configuration documentation. ([\#14868](https://github.com/matrix-org/synapse/issues/14868))
-- Document the export user data command. Contributed by @thezaidbintariq. ([\#14883](https://github.com/matrix-org/synapse/issues/14883))
-
-
-Deprecations and Removals
--------------------------
-
-- Poetry 1.3.2 or higher is now required when `poetry install`ing from source. ([\#14860](https://github.com/matrix-org/synapse/issues/14860))
-
-
-Internal Changes
-----------------
-
-- Faster remote room joins (worker mode): do not populate external hosts-in-room cache when sending events as this requires blocking for full state. ([\#14749](https://github.com/matrix-org/synapse/issues/14749))
-- Enable Complement tests for Faster Remote Room Joins against worker-mode Synapse. ([\#14752](https://github.com/matrix-org/synapse/issues/14752))
-- Add some clarifying comments and refactor a portion of the `Keyring` class for readability. ([\#14804](https://github.com/matrix-org/synapse/issues/14804))
-- Add local poetry config files (`poetry.toml`) to `.gitignore`. ([\#14807](https://github.com/matrix-org/synapse/issues/14807))
-- Add missing type hints. ([\#14816](https://github.com/matrix-org/synapse/issues/14816), [\#14885](https://github.com/matrix-org/synapse/issues/14885), [\#14889](https://github.com/matrix-org/synapse/issues/14889))
-- Refactor push tests. ([\#14819](https://github.com/matrix-org/synapse/issues/14819))
-- Re-enable some linting that was disabled when we switched to ruff. ([\#14821](https://github.com/matrix-org/synapse/issues/14821))
-- Add `cargo fmt` and `cargo clippy` to the lint script. ([\#14822](https://github.com/matrix-org/synapse/issues/14822))
-- Drop unused table `presence`. ([\#14825](https://github.com/matrix-org/synapse/issues/14825))
-- Merge the two account data and the two device list replication streams. ([\#14826](https://github.com/matrix-org/synapse/issues/14826), [\#14833](https://github.com/matrix-org/synapse/issues/14833))
-- Faster joins: use stable identifiers from [MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706). ([\#14832](https://github.com/matrix-org/synapse/issues/14832), [\#14841](https://github.com/matrix-org/synapse/issues/14841))
-- Add a parameter to control whether the federation client performs a partial state join. ([\#14843](https://github.com/matrix-org/synapse/issues/14843))
-- Add check to avoid starting duplicate partial state syncs. ([\#14844](https://github.com/matrix-org/synapse/issues/14844))
-- Add an early return when handling no-op presence updates. ([\#14855](https://github.com/matrix-org/synapse/issues/14855))
-- Fix `wait_for_stream_position` to correctly wait for the right instance to advance its token. ([\#14856](https://github.com/matrix-org/synapse/issues/14856), [\#14872](https://github.com/matrix-org/synapse/issues/14872))
-- Always notify replication when a stream advances automatically. ([\#14877](https://github.com/matrix-org/synapse/issues/14877))
-- Reduce max time we wait for stream positions. ([\#14881](https://github.com/matrix-org/synapse/issues/14881))
-- Faster joins: allow the resync process more time to fetch `/state` ids. ([\#14912](https://github.com/matrix-org/synapse/issues/14912))
-- Bump regex from 1.7.0 to 1.7.1. ([\#14848](https://github.com/matrix-org/synapse/issues/14848))
-- Bump peaceiris/actions-gh-pages from 3.9.1 to 3.9.2. ([\#14861](https://github.com/matrix-org/synapse/issues/14861))
-- Bump ruff from 0.0.215 to 0.0.224. ([\#14862](https://github.com/matrix-org/synapse/issues/14862))
-- Bump types-pillow from 9.4.0.0 to 9.4.0.3. ([\#14863](https://github.com/matrix-org/synapse/issues/14863))
-- Bump types-opentracing from 2.4.10 to 2.4.10.1. ([\#14896](https://github.com/matrix-org/synapse/issues/14896))
-- Bump ruff from 0.0.224 to 0.0.230. ([\#14897](https://github.com/matrix-org/synapse/issues/14897))
-- Bump types-requests from 2.28.11.7 to 2.28.11.8. ([\#14899](https://github.com/matrix-org/synapse/issues/14899))
-- Bump types-psycopg2 from 2.9.21.2 to 2.9.21.4. ([\#14900](https://github.com/matrix-org/synapse/issues/14900))
-- Bump types-commonmark from 0.9.2 to 0.9.2.1. ([\#14901](https://github.com/matrix-org/synapse/issues/14901))
-
-
-Synapse 1.75.0 (2023-01-17)
-===========================
-
-No significant changes since 1.75.0rc2.
-
-
-Synapse 1.75.0rc2 (2023-01-12)
-==============================
-
-Bugfixes
---------
-
-- Fix a bug introduced in Synapse 1.75.0rc1 where device lists could be miscalculated with some sync filters. ([\#14810](https://github.com/matrix-org/synapse/issues/14810))
-- Fix race where calling `/members` or `/state` with an `at` parameter could fail for newly created rooms, when using multiple workers. ([\#14817](https://github.com/matrix-org/synapse/issues/14817))
-
-
-Synapse 1.75.0rc1 (2023-01-10)
-==============================
-
-Features
---------
-
-- Add a `cached` function to `synapse.module_api` that returns a decorator to cache return values of functions. ([\#14663](https://github.com/matrix-org/synapse/issues/14663))
-- Add experimental support for [MSC3391](https://github.com/matrix-org/matrix-spec-proposals/pull/3391) (removing account data). ([\#14714](https://github.com/matrix-org/synapse/issues/14714))
-- Support [RFC7636](https://datatracker.ietf.org/doc/html/rfc7636) Proof Key for Code Exchange for OAuth single sign-on. ([\#14750](https://github.com/matrix-org/synapse/issues/14750))
-- Support non-OpenID compliant userinfo claims for subject and picture. ([\#14753](https://github.com/matrix-org/synapse/issues/14753))
-- Improve performance of `/sync` when filtering all rooms, message types, or senders. ([\#14786](https://github.com/matrix-org/synapse/issues/14786))
-- Improve performance of the `/hierarchy` endpoint. ([\#14263](https://github.com/matrix-org/synapse/issues/14263))
-
-
-Bugfixes
---------
-
-- Fix the *MAU Limits* section of the Grafana dashboard relying on a specific `job` name for the workers of a Synapse deployment. ([\#14644](https://github.com/matrix-org/synapse/issues/14644))
-- Fix a bug introduced in Synapse 1.70.0 which could cause spurious `UNIQUE constraint failed` errors in the `rotate_notifs` background job. ([\#14669](https://github.com/matrix-org/synapse/issues/14669))
-- Ensure stream IDs are always updated after caches get invalidated with workers. Contributed by Nick @ Beeper (@fizzadar). ([\#14723](https://github.com/matrix-org/synapse/issues/14723))
-- Remove the unspecced `device` field from `/pushrules` responses. ([\#14727](https://github.com/matrix-org/synapse/issues/14727))
-- Fix a bug introduced in Synapse 1.73.0 where the `picture_claim` configured under `oidc_providers` was unused (the default value of `"picture"` was used instead). ([\#14751](https://github.com/matrix-org/synapse/issues/14751))
-- Unescape HTML entities in URL preview titles making use of oEmbed responses. ([\#14781](https://github.com/matrix-org/synapse/issues/14781))
-- Disable sending confirmation email when 3pid is disabled. ([\#14725](https://github.com/matrix-org/synapse/issues/14725))
-
-
-Improved Documentation
-----------------------
-
-- Declare support for Python 3.11. ([\#14673](https://github.com/matrix-org/synapse/issues/14673))
-- Fix `target_memory_usage` being used in the description for the actual `cache_autotune` sub-option `target_cache_memory_usage`. ([\#14674](https://github.com/matrix-org/synapse/issues/14674))
-- Move `email` to Server section in config file documentation. ([\#14730](https://github.com/matrix-org/synapse/issues/14730))
-- Fix broken links in the Synapse documentation. ([\#14744](https://github.com/matrix-org/synapse/issues/14744))
-- Add missing worker settings to shared configuration documentation. ([\#14748](https://github.com/matrix-org/synapse/issues/14748))
-- Document using Twitter as a OAuth 2.0 authentication provider. ([\#14778](https://github.com/matrix-org/synapse/issues/14778))
-- Fix Synapse 1.74 upgrade notes to correctly explain how to install pyICU when installing Synapse from PyPI. ([\#14797](https://github.com/matrix-org/synapse/issues/14797))
-- Update link to towncrier in contribution guide. ([\#14801](https://github.com/matrix-org/synapse/issues/14801))
-- Use `htmltest` to check links in the Synapse documentation. ([\#14743](https://github.com/matrix-org/synapse/issues/14743))
-
-
-Internal Changes
-----------------
-
-- Faster remote room joins: stream the un-partial-stating of events over replication. ([\#14545](https://github.com/matrix-org/synapse/issues/14545), [\#14546](https://github.com/matrix-org/synapse/issues/14546))
-- Use [ruff](https://github.com/charliermarsh/ruff/) instead of flake8. ([\#14633](https://github.com/matrix-org/synapse/issues/14633), [\#14741](https://github.com/matrix-org/synapse/issues/14741))
-- Change `handle_new_client_event` signature so that a 429 does not reach clients on `PartialStateConflictError`, and internally retry when needed instead. ([\#14665](https://github.com/matrix-org/synapse/issues/14665))
-- Remove dependency on jQuery on reCAPTCHA page. ([\#14672](https://github.com/matrix-org/synapse/issues/14672))
-- Faster joins: make `compute_state_after_events` consistent with other state-fetching functions that take a `StateFilter`. ([\#14676](https://github.com/matrix-org/synapse/issues/14676))
-- Add missing type hints. ([\#14680](https://github.com/matrix-org/synapse/issues/14680), [\#14681](https://github.com/matrix-org/synapse/issues/14681), [\#14687](https://github.com/matrix-org/synapse/issues/14687))
-- Improve type annotations for the helper methods on a `CachedFunction`. ([\#14685](https://github.com/matrix-org/synapse/issues/14685))
-- Check that the SQLite database file exists before porting to PostgreSQL. ([\#14692](https://github.com/matrix-org/synapse/issues/14692))
-- Add `.direnv/` directory to .gitignore to prevent local state generated by the [direnv](https://direnv.net/) development tool from being committed. ([\#14707](https://github.com/matrix-org/synapse/issues/14707))
-- Batch up replication requests to request the resyncing of remote users's devices. ([\#14716](https://github.com/matrix-org/synapse/issues/14716))
-- If debug logging is enabled, log the `msgid`s of any to-device messages that are returned over `/sync`. ([\#14724](https://github.com/matrix-org/synapse/issues/14724))
-- Change GHA CI job to follow best practices. ([\#14772](https://github.com/matrix-org/synapse/issues/14772))
-- Switch to our fork of `dh-virtualenv` to work around an upstream Python 3.11 incompatibility. ([\#14774](https://github.com/matrix-org/synapse/issues/14774))
-- Skip testing built wheels for PyPy 3.7 on Linux x86_64 as we lack new required dependencies in the build environment. ([\#14802](https://github.com/matrix-org/synapse/issues/14802))
-
-### Dependabot updates
-
-<details>
-
-- Bump JasonEtco/create-an-issue from 2.8.1 to 2.8.2. ([\#14693](https://github.com/matrix-org/synapse/issues/14693))
-- Bump anyhow from 1.0.66 to 1.0.68. ([\#14694](https://github.com/matrix-org/synapse/issues/14694))
-- Bump blake2 from 0.10.5 to 0.10.6. ([\#14695](https://github.com/matrix-org/synapse/issues/14695))
-- Bump serde_json from 1.0.89 to 1.0.91. ([\#14696](https://github.com/matrix-org/synapse/issues/14696))
-- Bump serde from 1.0.150 to 1.0.151. ([\#14697](https://github.com/matrix-org/synapse/issues/14697))
-- Bump lxml from 4.9.1 to 4.9.2. ([\#14698](https://github.com/matrix-org/synapse/issues/14698))
-- Bump types-jsonschema from 4.17.0.1 to 4.17.0.2. ([\#14700](https://github.com/matrix-org/synapse/issues/14700))
-- Bump sentry-sdk from 1.11.1 to 1.12.0. ([\#14701](https://github.com/matrix-org/synapse/issues/14701))
-- Bump types-setuptools from 65.6.0.1 to 65.6.0.2. ([\#14702](https://github.com/matrix-org/synapse/issues/14702))
-- Bump minimum PyYAML to 3.13. ([\#14720](https://github.com/matrix-org/synapse/issues/14720))
-- Bump JasonEtco/create-an-issue from 2.8.2 to 2.9.1. ([\#14731](https://github.com/matrix-org/synapse/issues/14731))
-- Bump towncrier from 22.8.0 to 22.12.0. ([\#14732](https://github.com/matrix-org/synapse/issues/14732))
-- Bump isort from 5.10.1 to 5.11.4. ([\#14733](https://github.com/matrix-org/synapse/issues/14733))
-- Bump attrs from 22.1.0 to 22.2.0. ([\#14734](https://github.com/matrix-org/synapse/issues/14734))
-- Bump black from 22.10.0 to 22.12.0. ([\#14735](https://github.com/matrix-org/synapse/issues/14735))
-- Bump sentry-sdk from 1.12.0 to 1.12.1. ([\#14736](https://github.com/matrix-org/synapse/issues/14736))
-- Bump setuptools from 65.3.0 to 65.5.1. ([\#14738](https://github.com/matrix-org/synapse/issues/14738))
-- Bump serde from 1.0.151 to 1.0.152. ([\#14758](https://github.com/matrix-org/synapse/issues/14758))
-- Bump ruff from 0.0.189 to 0.0.206. ([\#14759](https://github.com/matrix-org/synapse/issues/14759))
-- Bump pydantic from 1.10.2 to 1.10.4. ([\#14760](https://github.com/matrix-org/synapse/issues/14760))
-- Bump gitpython from 3.1.29 to 3.1.30. ([\#14761](https://github.com/matrix-org/synapse/issues/14761))
-- Bump pillow from 9.3.0 to 9.4.0. ([\#14762](https://github.com/matrix-org/synapse/issues/14762))
-- Bump types-requests from 2.28.11.5 to 2.28.11.7. ([\#14763](https://github.com/matrix-org/synapse/issues/14763))
-- Bump dawidd6/action-download-artifact from 2.24.2 to 2.24.3. ([\#14779](https://github.com/matrix-org/synapse/issues/14779))
-- Bump peaceiris/actions-gh-pages from 3.9.0 to 3.9.1. ([\#14791](https://github.com/matrix-org/synapse/issues/14791))
-- Bump types-pillow from 9.3.0.4 to 9.4.0.0. ([\#14792](https://github.com/matrix-org/synapse/issues/14792))
-- Bump pyopenssl from 22.1.0 to 23.0.0. ([\#14793](https://github.com/matrix-org/synapse/issues/14793))
-- Bump types-setuptools from 65.6.0.2 to 65.6.0.3. ([\#14794](https://github.com/matrix-org/synapse/issues/14794))
-- Bump importlib-metadata from 4.2.0 to 6.0.0. ([\#14795](https://github.com/matrix-org/synapse/issues/14795))
-- Bump ruff from 0.0.206 to 0.0.215. ([\#14796](https://github.com/matrix-org/synapse/issues/14796))
-</details>
+* Bump anyhow from 1.0.93 to 1.0.95. ([\#18012](https://github.com/element-hq/synapse/issues/18012), [\#18045](https://github.com/element-hq/synapse/issues/18045))
+* Bump authlib from 1.3.2 to 1.4.0. ([\#18048](https://github.com/element-hq/synapse/issues/18048))
+* Bump dawidd6/action-download-artifact from 6 to 7. ([\#17981](https://github.com/element-hq/synapse/issues/17981))
+* Bump http from 1.1.0 to 1.2.0. ([\#18013](https://github.com/element-hq/synapse/issues/18013))
+- Bump mypy from 1.11.2 to 1.12.1. ([\#17999](https://github.com/element-hq/synapse/issues/17999))
+* Bump mypy-zope from 1.0.8 to 1.0.9. ([\#18047](https://github.com/element-hq/synapse/issues/18047))
+* Bump pillow from 10.4.0 to 11.0.0. ([\#18015](https://github.com/element-hq/synapse/issues/18015))
+* Bump pydantic from 2.9.2 to 2.10.3. ([\#18014](https://github.com/element-hq/synapse/issues/18014))
+* Bump pyicu from 2.13.1 to 2.14. ([\#18060](https://github.com/element-hq/synapse/issues/18060))
+* Bump pyo3 from 0.23.2 to 0.23.3. ([\#18001](https://github.com/element-hq/synapse/issues/18001))
+* Bump python-multipart from 0.0.16 to 0.0.18. ([\#17985](https://github.com/element-hq/synapse/issues/17985))
+* Bump sentry-sdk from 2.17.0 to 2.19.2. ([\#18061](https://github.com/element-hq/synapse/issues/18061))
+* Bump serde from 1.0.215 to 1.0.217. ([\#18031](https://github.com/element-hq/synapse/issues/18031), [\#18059](https://github.com/element-hq/synapse/issues/18059))
+* Bump serde_json from 1.0.133 to 1.0.134. ([\#18044](https://github.com/element-hq/synapse/issues/18044))
+* Bump twine from 5.1.1 to 6.0.1. ([\#18049](https://github.com/element-hq/synapse/issues/18049))
 
 **Changelogs for older versions can be found [here](docs/changelogs/).**
diff --git a/Cargo.lock b/Cargo.lock
index 46c930ebd7..f53d029cbd 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -13,9 +13,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.93"
+version = "1.0.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c95c10ba0b00a02636238b814946408b1322d5ac4760326e6fb8ec956d85775"
+checksum = "dcfed56ad506cb2c684a14971b8861fdc3baaaae314b9e5f9bb532cbe3ba7a4f"
 
 [[package]]
 name = "arc-swap"
@@ -37,9 +37,9 @@ checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
 [[package]]
 name = "bitflags"
-version = "2.5.0"
+version = "2.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf4b9d6a944f767f8e5e0db018570623c85f3d925ac718db4e06d0187adb21c1"
+checksum = "8f68f53c83ab957f72c32642f3868eec03eb974d1fb82e453128456482613d36"
 
 [[package]]
 name = "blake2"
@@ -67,9 +67,9 @@ checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
 
 [[package]]
 name = "bytes"
-version = "1.8.0"
+version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ac0150caa2ae65ca5bd83f25c7de183dea78d4d366469f148435e2acfbad0da"
+checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"
 
 [[package]]
 name = "cfg-if"
@@ -125,15 +125,14 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.15"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c4567c8db10ae91089c99af84c68c38da3ec2f087c3f82960bcdbf3656b6f4d7"
+checksum = "43a49c392881ce6d5c3b8cb70f98717b7c07aabbdff06687b9030dbfbe2725f8"
 dependencies = [
  "cfg-if",
- "js-sys",
  "libc",
  "wasi",
- "wasm-bindgen",
+ "windows-targets",
 ]
 
 [[package]]
@@ -162,9 +161,9 @@ dependencies = [
 
 [[package]]
 name = "heck"
-version = "0.4.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
 [[package]]
 name = "hex"
@@ -174,9 +173,9 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "http"
-version = "1.1.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21b9ddb458710bc376481b842f5da65cdf31522de232c1ca8146abce2a358258"
+checksum = "f4a85d31aea989eead29a3aaf9e1115a180df8282431156e533de47660892565"
 dependencies = [
  "bytes",
  "fnv",
@@ -222,21 +221,11 @@ version = "0.2.154"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae743338b92ff9146ce83992f766a31066a91a8c84a45e0e9f21e7cf6de6d346"
 
-[[package]]
-name = "lock_api"
-version = "0.4.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07af8b9cdd281b7915f413fa73f29ebd5d55d0d3f0155584dade1ff18cea1b17"
-dependencies = [
- "autocfg",
- "scopeguard",
-]
-
 [[package]]
 name = "log"
-version = "0.4.22"
+version = "0.4.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
+checksum = "30bde2b3dc3671ae49d8e2e9f044c7c005836e7a023ee57cffa25ab82764bb9e"
 
 [[package]]
 name = "memchr"
@@ -265,29 +254,6 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
-[[package]]
-name = "parking_lot"
-version = "0.12.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e4af0ca4f6caed20e900d564c242b8e5d4903fdacf31d3daf527b66fe6f42fb"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.9.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-targets",
-]
-
 [[package]]
 name = "portable-atomic"
 version = "1.6.0"
@@ -311,16 +277,16 @@ dependencies = [
 
 [[package]]
 name = "pyo3"
-version = "0.21.2"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5e00b96a521718e08e03b1a622f01c8a8deb50719335de3f60b3b3950f069d8"
+checksum = "7778bffd85cf38175ac1f545509665d0b9b92a198ca7941f131f85f7a4f9a872"
 dependencies = [
  "anyhow",
  "cfg-if",
  "indoc",
  "libc",
  "memoffset",
- "parking_lot",
+ "once_cell",
  "portable-atomic",
  "pyo3-build-config",
  "pyo3-ffi",
@@ -330,9 +296,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-build-config"
-version = "0.21.2"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7883df5835fafdad87c0d888b266c8ec0f4c9ca48a5bed6bbb592e8dedee1b50"
+checksum = "94f6cbe86ef3bf18998d9df6e0f3fc1050a8c5efa409bf712e661a4366e010fb"
 dependencies = [
  "once_cell",
  "target-lexicon",
@@ -340,9 +306,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-ffi"
-version = "0.21.2"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01be5843dc60b916ab4dad1dca6d20b9b4e6ddc8e15f50c47fe6d85f1fb97403"
+checksum = "e9f1b4c431c0bb1c8fb0a338709859eed0d030ff6daa34368d3b152a63dfdd8d"
 dependencies = [
  "libc",
  "pyo3-build-config",
@@ -350,9 +316,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-log"
-version = "0.10.0"
+version = "0.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2af49834b8d2ecd555177e63b273b708dea75150abc6f5341d0a6e1a9623976c"
+checksum = "be5bb22b77965a7b5394e9aae9897a0607b51df5167561ffc3b02643b4200bc7"
 dependencies = [
  "arc-swap",
  "log",
@@ -361,9 +327,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros"
-version = "0.21.2"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77b34069fc0682e11b31dbd10321cbf94808394c56fd996796ce45217dfac53c"
+checksum = "fbc2201328f63c4710f68abdf653c89d8dbc2858b88c5d88b0ff38a75288a9da"
 dependencies = [
  "proc-macro2",
  "pyo3-macros-backend",
@@ -373,9 +339,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-macros-backend"
-version = "0.21.2"
+version = "0.23.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08260721f32db5e1a5beae69a55553f56b99bd0e1c3e6e0a5e8851a9d0f5a85c"
+checksum = "fca6726ad0f3da9c9de093d6f116a93c1a38e417ed73bf138472cf4064f72028"
 dependencies = [
  "heck",
  "proc-macro2",
@@ -386,9 +352,9 @@ dependencies = [
 
 [[package]]
 name = "pythonize"
-version = "0.21.1"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d0664248812c38cc55a4ed07f88e4df516ce82604b93b1ffdc041aa77a6cb3c"
+checksum = "91a6ee7a084f913f98d70cdc3ebec07e852b735ae3059a1500db2661265da9ff"
 dependencies = [
  "pyo3",
  "serde",
@@ -405,20 +371,20 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.8.5"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+checksum = "3779b94aeb87e8bd4e834cee3650289ee9e0d5677f976ecdb6d219e5f4f6cd94"
 dependencies = [
- "libc",
  "rand_chacha",
  "rand_core",
+ "zerocopy",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.3.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
 dependencies = [
  "ppv-lite86",
  "rand_core",
@@ -426,20 +392,12 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.4"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+checksum = "b08f3c9802962f7e1b25113931d94f43ed9725bebc59db9d0c3e9a23b67e15ff"
 dependencies = [
  "getrandom",
-]
-
-[[package]]
-name = "redox_syscall"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "469052894dcb553421e483e4209ee581a45100d31b4018de03e5a7ad86374a7e"
-dependencies = [
- "bitflags",
+ "zerocopy",
 ]
 
 [[package]]
@@ -477,26 +435,20 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
 
-[[package]]
-name = "scopeguard"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
-
 [[package]]
 name = "serde"
-version = "1.0.215"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6513c1ad0b11a9376da888e3e0baa0077f1aed55c17f50e7b2397136129fb88f"
+checksum = "5f0e2c6ed6606019b4e29e69dbaba95b11854410e5347d525002456dbbb786b6"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.215"
+version = "1.0.219"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad1e866f866923f252f05c889987993144fb74e722403468a4ebd70c3cd756c0"
+checksum = "5b0276cf7f2c73365f7157c8123c21cd9a50fbbd844757af28ca1f5925fc2a00"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -505,9 +457,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.132"
+version = "1.0.140"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d726bfaff4b320266d395898905d0eba0345aae23b54aee3a737e260fd46db03"
+checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
 dependencies = [
  "itoa",
  "memchr",
@@ -537,12 +489,6 @@ dependencies = [
  "digest",
 ]
 
-[[package]]
-name = "smallvec"
-version = "1.13.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
-
 [[package]]
 name = "subtle"
 version = "2.5.0"
@@ -598,11 +544,10 @@ checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
 
 [[package]]
 name = "ulid"
-version = "1.1.3"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04f903f293d11f31c0c29e4148f6dc0d033a7f80cebc0282bea147611667d289"
+checksum = "470dbf6591da1b39d43c14523b2b469c86879a53e8b758c8e090a470fe7b1fbe"
 dependencies = [
- "getrandom",
  "rand",
  "web-time",
 ]
@@ -627,9 +572,12 @@ checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "wasi"
-version = "0.11.0+wasi-snapshot-preview1"
+version = "0.13.3+wasi-0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+checksum = "26816d2e1a4a36a2940b96c5296ce403917633dff8f3440e9b236ed6f6bacad2"
+dependencies = [
+ "wit-bindgen-rt",
+]
 
 [[package]]
 name = "wasm-bindgen"
@@ -697,9 +645,9 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f0713a46559409d202e70e28227288446bf7841d3211583a4b53e3f6d96e7eb"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
  "windows_aarch64_gnullvm",
  "windows_aarch64_msvc",
@@ -713,48 +661,77 @@ dependencies = [
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7088eed71e8b8dda258ecc8bac5fb1153c5cffaf2578fc8ff5d61e23578d3263"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
 
 [[package]]
 name = "windows_i686_gnullvm"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.52.5"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[package]]
+name = "wit-bindgen-rt"
+version = "0.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3268f3d866458b787f390cf61f4bbb563b922d091359f9608842999eaee3943c"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "zerocopy"
+version = "0.8.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa91407dacce3a68c56de03abe2760159582b846c6a4acd2f456618087f12713"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.8.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06718a168365cad3d5ff0bb133aad346959a2074bd4a85c121255a11304a8626"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/LICENSE b/LICENSE-AGPL-3.0
similarity index 100%
rename from LICENSE
rename to LICENSE-AGPL-3.0
diff --git a/LICENSE-COMMERCIAL b/LICENSE-COMMERCIAL
new file mode 100644
index 0000000000..173e03e0c0
--- /dev/null
+++ b/LICENSE-COMMERCIAL
@@ -0,0 +1,6 @@
+Licensees holding a valid commercial license with Element may use this
+software in accordance with the terms contained in a written agreement
+between you and Element.
+
+To purchase a commercial license please contact our sales team at
+licensing@element.io
diff --git a/README.rst b/README.rst
index 2fe4a7e43f..77f861e788 100644
--- a/README.rst
+++ b/README.rst
@@ -10,14 +10,15 @@ implementation, written and maintained by `Element <https://element.io>`_.
 `Matrix <https://github.com/matrix-org>`__ is the open standard for
 secure and interoperable real time communications. You can directly run
 and manage the source code in this repository, available under an AGPL
-license. There is no support provided from Element unless you have a
-subscription.
+license (or alternatively under a commercial license from Element).
+There is no support provided by Element unless you have a
+subscription from Element.
 
-Subscription alternative
-========================
+Subscription
+============
 
-Alternatively, for those that need an enterprise-ready solution, Element
-Server Suite (ESS) is `available as a subscription <https://element.io/pricing>`_.
+For those that need an enterprise-ready solution, Element
+Server Suite (ESS) is `available via subscription <https://element.io/pricing>`_.
 ESS builds on Synapse to offer a complete Matrix-based backend including the full
 `Admin Console product <https://element.io/enterprise-functionality/admin-console>`_,
 giving admins the power to easily manage an organization-wide
@@ -249,6 +250,20 @@ Developers might be particularly interested in:
 Alongside all that, join our developer community on Matrix:
 `#synapse-dev:matrix.org <https://matrix.to/#/#synapse-dev:matrix.org>`_, featuring real humans!
 
+Copyright and Licensing
+=======================
+
+Copyright 2014-2017 OpenMarket Ltd
+Copyright 2017 Vector Creations Ltd
+Copyright 2017-2025 New Vector Ltd 
+
+This software is dual-licensed by New Vector Ltd (Element). It can be used either:
+  
+(1) for free under the terms of the GNU Affero General Public License (as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version); OR
+  
+(2) under the terms of a paid-for Element Commercial License agreement between you and Element (the terms of which may vary depending on what you and Element have agreed to).
+Unless required by applicable law or agreed to in writing, software distributed under the Licenses is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the Licenses for the specific language governing permissions and limitations under the Licenses.
+
 
 .. |support| image:: https://img.shields.io/badge/matrix-community%20support-success
   :alt: (get community support in #synapse:matrix.org)
diff --git a/build_rust.py b/build_rust.py
index 662474dcb4..d2726cee26 100644
--- a/build_rust.py
+++ b/build_rust.py
@@ -1,8 +1,10 @@
 # A build script for poetry that adds the rust extension.
 
+import itertools
 import os
 from typing import Any, Dict
 
+from packaging.specifiers import SpecifierSet
 from setuptools_rust import Binding, RustExtension
 
 
@@ -14,6 +16,8 @@ def build(setup_kwargs: Dict[str, Any]) -> None:
         target="synapse.synapse_rust",
         path=cargo_toml_path,
         binding=Binding.PyO3,
+        # This flag is a no-op in the latest versions. Instead, we need to
+        # specify this in the `bdist_wheel` config below.
         py_limited_api=True,
         # We force always building in release mode, as we can't tell the
         # difference between using `poetry` in development vs production.
@@ -21,3 +25,18 @@ def build(setup_kwargs: Dict[str, Any]) -> None:
     )
     setup_kwargs.setdefault("rust_extensions", []).append(extension)
     setup_kwargs["zip_safe"] = False
+
+    # We lookup the minimum supported python version by looking at
+    # `python_requires` (e.g. ">=3.9.0,<4.0.0") and finding the first python
+    # version that matches. We then convert that into the `py_limited_api` form,
+    # e.g. cp39 for python 3.9.
+    py_limited_api: str
+    python_bounds = SpecifierSet(setup_kwargs["python_requires"])
+    for minor_version in itertools.count(start=8):
+        if f"3.{minor_version}.0" in python_bounds:
+            py_limited_api = f"cp3{minor_version}"
+            break
+
+    setup_kwargs.setdefault("options", {}).setdefault("bdist_wheel", {})[
+        "py_limited_api"
+    ] = py_limited_api
diff --git a/changelog.d/18068.misc b/changelog.d/18068.misc
new file mode 100644
index 0000000000..af6f78f549
--- /dev/null
+++ b/changelog.d/18068.misc
@@ -0,0 +1 @@
+Add a column `participant` to `room_memberships` table.
\ No newline at end of file
diff --git a/changelog.d/18074.bugfix b/changelog.d/18074.bugfix
new file mode 100644
index 0000000000..03e0b95988
--- /dev/null
+++ b/changelog.d/18074.bugfix
@@ -0,0 +1 @@
+Add index to sliding sync membership snapshot table, to fix a performance issue.
\ No newline at end of file
diff --git a/changelog.d/18251.misc b/changelog.d/18251.misc
new file mode 100644
index 0000000000..3b557a06c4
--- /dev/null
+++ b/changelog.d/18251.misc
@@ -0,0 +1 @@
+Update Poetry to 2.1.1, including updating the lock file version.
\ No newline at end of file
diff --git a/changelog.d/18254.feature b/changelog.d/18254.feature
new file mode 100644
index 0000000000..62e1b79a15
--- /dev/null
+++ b/changelog.d/18254.feature
@@ -0,0 +1 @@
+Add background job to clear unreferenced state groups.
diff --git a/changelog.d/18255.misc b/changelog.d/18255.misc
new file mode 100644
index 0000000000..49a5b0e7b6
--- /dev/null
+++ b/changelog.d/18255.misc
@@ -0,0 +1 @@
+Pin GitHub Actions dependencies by commit hash.
\ No newline at end of file
diff --git a/contrib/cmdclient/console.py b/contrib/cmdclient/console.py
index ca2e72b5e8..9b5d33d2b1 100755
--- a/contrib/cmdclient/console.py
+++ b/contrib/cmdclient/console.py
@@ -245,7 +245,7 @@ class SynapseCmd(cmd.Cmd):
 
         if "flows" not in json_res:
             print("Failed to find any login flows.")
-            defer.returnValue(False)
+            return False
 
         flow = json_res["flows"][0]  # assume first is the one we want.
         if "type" not in flow or "m.login.password" != flow["type"] or "stages" in flow:
@@ -254,8 +254,8 @@ class SynapseCmd(cmd.Cmd):
                 "Unable to login via the command line client. Please visit "
                 "%s to login." % fallback_url
             )
-            defer.returnValue(False)
-        defer.returnValue(True)
+            return False
+        return True
 
     def do_emailrequest(self, line):
         """Requests the association of a third party identifier
diff --git a/contrib/cmdclient/http.py b/contrib/cmdclient/http.py
index e6a10b5f32..54363e4259 100644
--- a/contrib/cmdclient/http.py
+++ b/contrib/cmdclient/http.py
@@ -78,7 +78,7 @@ class TwistedHttpClient(HttpClient):
             url, data, headers_dict={"Content-Type": ["application/json"]}
         )
         body = yield readBody(response)
-        defer.returnValue((response.code, body))
+        return response.code, body
 
     @defer.inlineCallbacks
     def get_json(self, url, args=None):
@@ -88,7 +88,7 @@ class TwistedHttpClient(HttpClient):
             url = "%s?%s" % (url, qs)
         response = yield self._create_get_request(url)
         body = yield readBody(response)
-        defer.returnValue(json.loads(body))
+        return json.loads(body)
 
     def _create_put_request(self, url, json_data, headers_dict: Optional[dict] = None):
         """Wrapper of _create_request to issue a PUT request"""
@@ -134,7 +134,7 @@ class TwistedHttpClient(HttpClient):
             response = yield self._create_request(method, url)
 
         body = yield readBody(response)
-        defer.returnValue(json.loads(body))
+        return json.loads(body)
 
     @defer.inlineCallbacks
     def _create_request(
@@ -173,7 +173,7 @@ class TwistedHttpClient(HttpClient):
         if self.verbose:
             print("Status %s %s" % (response.code, response.phrase))
             print(pformat(list(response.headers.getAllRawHeaders())))
-        defer.returnValue(response)
+        return response
 
     def sleep(self, seconds):
         d = defer.Deferred()
diff --git a/contrib/docker/README.md b/contrib/docker/README.md
index 89c1518bd0..fdfa96795a 100644
--- a/contrib/docker/README.md
+++ b/contrib/docker/README.md
@@ -30,3 +30,6 @@ docker-compose up -d
 ### More information
 
 For more information on required environment variables and mounts, see the main docker documentation at [/docker/README.md](../../docker/README.md)
+
+**For a more comprehensive Docker Compose example showcasing a full Matrix 2.0 stack, please see
+https://github.com/element-hq/element-docker-demo**
\ No newline at end of file
diff --git a/contrib/docker/docker-compose.yml b/contrib/docker/docker-compose.yml
index 36d5fd5309..9dffc852fd 100644
--- a/contrib/docker/docker-compose.yml
+++ b/contrib/docker/docker-compose.yml
@@ -51,7 +51,7 @@ services:
       - traefik.http.routers.https-synapse.tls.certResolver=le-ssl
 
   db:
-    image: docker.io/postgres:12-alpine
+    image: docker.io/postgres:15-alpine
     # Change that password, of course!
     environment:
       - POSTGRES_USER=synapse
diff --git a/contrib/docker_compose_workers/README.md b/contrib/docker_compose_workers/README.md
index 81518f6ba1..16c8c26795 100644
--- a/contrib/docker_compose_workers/README.md
+++ b/contrib/docker_compose_workers/README.md
@@ -8,6 +8,9 @@ All examples and snippets assume that your Synapse service is called `synapse` i
 
 An example Docker Compose file can be found [here](docker-compose.yaml).
 
+**For a more comprehensive Docker Compose example, showcasing a full Matrix 2.0 stack (originally based on this
+docker-compose.yaml), please see https://github.com/element-hq/element-docker-demo**
+
 ## Worker Service Examples in Docker Compose
 
 In order to start the Synapse container as a worker, you must specify an `entrypoint` that loads both the `homeserver.yaml` and the configuration for the worker (`synapse-generic-worker-1.yaml` in the example below). You must also include the worker type in the environment variable `SYNAPSE_WORKER` or alternatively pass `-m synapse.app.generic_worker` as part of the `entrypoint` after `"/start.py", "run"`).
diff --git a/debian/build_virtualenv b/debian/build_virtualenv
index 5fc817b607..9e7fb95c8e 100755
--- a/debian/build_virtualenv
+++ b/debian/build_virtualenv
@@ -35,7 +35,7 @@ TEMP_VENV="$(mktemp -d)"
 python3 -m venv "$TEMP_VENV"
 source "$TEMP_VENV/bin/activate"
 pip install -U pip
-pip install poetry==1.3.2
+pip install poetry==2.1.1 poetry-plugin-export==1.9.0
 poetry export \
     --extras all \
     --extras test \
diff --git a/debian/changelog b/debian/changelog
index 3aa74d1d24..3d77fe8e92 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,117 @@
+matrix-synapse-py3 (1.127.0~rc1+nmu1) UNRELEASED; urgency=medium
+
+  * Update Poetry to 2.1.1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 19 Mar 2025 17:38:49 +0000
+
+matrix-synapse-py3 (1.127.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.127.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 18 Mar 2025 13:30:05 +0000
+
+matrix-synapse-py3 (1.126.0) stable; urgency=medium
+
+  * New Synapse release 1.126.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 11 Mar 2025 13:11:29 +0000
+
+matrix-synapse-py3 (1.126.0~rc3) stable; urgency=medium
+
+  * New Synapse release 1.126.0rc3.
+
+ -- Synapse Packaging team <packages@matrix.org>  Fri, 07 Mar 2025 15:45:05 +0000
+
+matrix-synapse-py3 (1.126.0~rc2) stable; urgency=medium
+
+  * New Synapse release 1.126.0rc2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 05 Mar 2025 14:29:12 +0000
+
+matrix-synapse-py3 (1.126.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.126.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Mar 2025 13:11:51 +0000
+
+matrix-synapse-py3 (1.125.0) stable; urgency=medium
+
+  * New Synapse release 1.125.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 25 Feb 2025 08:10:07 -0700
+
+matrix-synapse-py3 (1.125.0~rc1) stable; urgency=medium
+
+  * New synapse release 1.125.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 18 Feb 2025 13:32:49 +0000
+
+matrix-synapse-py3 (1.124.0) stable; urgency=medium
+
+  * New Synapse release 1.124.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 11 Feb 2025 11:55:22 +0100
+
+matrix-synapse-py3 (1.124.0~rc3) stable; urgency=medium
+
+  * New Synapse release 1.124.0rc3.
+
+ -- Synapse Packaging team <packages@matrix.org>  Fri, 07 Feb 2025 13:42:55 +0000
+
+matrix-synapse-py3 (1.124.0~rc2) stable; urgency=medium
+
+  * New Synapse release 1.124.0rc2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 05 Feb 2025 16:35:53 +0000
+
+matrix-synapse-py3 (1.124.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.124.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Feb 2025 11:53:05 +0000
+
+matrix-synapse-py3 (1.123.0) stable; urgency=medium
+
+  * New Synapse release 1.123.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 28 Jan 2025 08:37:34 -0700
+
+matrix-synapse-py3 (1.123.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.123.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 21 Jan 2025 14:39:57 +0100
+
+matrix-synapse-py3 (1.122.0) stable; urgency=medium
+
+  * New Synapse release 1.122.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 14 Jan 2025 14:14:14 +0000
+
+matrix-synapse-py3 (1.122.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.122.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 07 Jan 2025 14:06:19 +0000
+
+matrix-synapse-py3 (1.121.1) stable; urgency=medium
+
+  * New Synapse release 1.121.1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 11 Dec 2024 18:24:48 +0000
+
+matrix-synapse-py3 (1.121.0) stable; urgency=medium
+
+  * New Synapse release 1.121.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 11 Dec 2024 13:12:30 +0100
+
+matrix-synapse-py3 (1.121.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.121.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Wed, 04 Dec 2024 14:47:23 +0000
+
 matrix-synapse-py3 (1.120.2) stable; urgency=medium
 
   * New synapse release 1.120.2.
diff --git a/demo/start.sh b/demo/start.sh
index 06ec6f985f..e010302bf4 100755
--- a/demo/start.sh
+++ b/demo/start.sh
@@ -138,6 +138,13 @@ for port in 8080 8081 8082; do
 			  per_user:
 			    per_second: 1000
 			    burst_count: 1000
+			rc_presence:
+			  per_user:
+			    per_second: 1000
+			    burst_count: 1000
+			rc_delayed_event_mgmt:
+			  per_second: 1000
+			  burst_count: 1000
 			RC
 			)
             echo "${ratelimiting}" >> "$port.config"
diff --git a/docker/Dockerfile b/docker/Dockerfile
index a4931011a7..27125c4c0b 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -20,45 +20,16 @@
 # `poetry export | pip install -r /dev/stdin`, but beware: we have experienced bugs in
 # in `poetry export` in the past.
 
+ARG DEBIAN_VERSION=bookworm
 ARG PYTHON_VERSION=3.12
+ARG POETRY_VERSION=2.1.1
 
 ###
 ### Stage 0: generate requirements.txt
 ###
-# We hardcode the use of Debian bookworm here because this could change upstream
-# and other Dockerfiles used for testing are expecting bookworm.
-FROM docker.io/library/python:${PYTHON_VERSION}-slim-bookworm AS requirements
-
-# RUN --mount is specific to buildkit and is documented at
-# https://github.com/moby/buildkit/blob/master/frontend/dockerfile/docs/syntax.md#build-mounts-run---mount.
-# Here we use it to set up a cache for apt (and below for pip), to improve
-# rebuild speeds on slow connections.
-RUN \
-  --mount=type=cache,target=/var/cache/apt,sharing=locked \
-  --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  apt-get update -qq && apt-get install -yqq \
-  build-essential curl git libffi-dev libssl-dev pkg-config \
-  && rm -rf /var/lib/apt/lists/*
-
-# Install rust and ensure its in the PATH.
-# (Rust may be needed to compile `cryptography`---which is one of poetry's
-# dependencies---on platforms that don't have a `cryptography` wheel.
-ENV RUSTUP_HOME=/rust
-ENV CARGO_HOME=/cargo
-ENV PATH=/cargo/bin:/rust/bin:$PATH
-RUN mkdir /rust /cargo
-
-RUN curl -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --default-toolchain stable --profile minimal
-
-# arm64 builds consume a lot of memory if `CARGO_NET_GIT_FETCH_WITH_CLI` is not
-# set to true, so we expose it as a build-arg.
-ARG CARGO_NET_GIT_FETCH_WITH_CLI=false
-ENV CARGO_NET_GIT_FETCH_WITH_CLI=$CARGO_NET_GIT_FETCH_WITH_CLI
-
-# We install poetry in its own build stage to avoid its dependencies conflicting with
-# synapse's dependencies.
-RUN --mount=type=cache,target=/root/.cache/pip \
-  pip install --user "poetry==1.3.2"
+### This stage is platform-agnostic, so we can use the build platform in case of cross-compilation.
+###
+FROM --platform=$BUILDPLATFORM ghcr.io/astral-sh/uv:python${PYTHON_VERSION}-${DEBIAN_VERSION} AS requirements
 
 WORKDIR /synapse
 
@@ -75,41 +46,30 @@ ARG TEST_ONLY_SKIP_DEP_HASH_VERIFICATION
 # Instead, we'll just install what a regular `pip install` would from PyPI.
 ARG TEST_ONLY_IGNORE_POETRY_LOCKFILE
 
+# This silences a warning as uv isn't able to do hardlinks between its cache
+# (mounted as --mount=type=cache) and the target directory.
+ENV UV_LINK_MODE=copy
+
 # Export the dependencies, but only if we're actually going to use the Poetry lockfile.
 # Otherwise, just create an empty requirements file so that the Dockerfile can
 # proceed.
-RUN if [ -z "$TEST_ONLY_IGNORE_POETRY_LOCKFILE" ]; then \
-  /root/.local/bin/poetry export --extras all -o /synapse/requirements.txt ${TEST_ONLY_SKIP_DEP_HASH_VERIFICATION:+--without-hashes}; \
+ARG POETRY_VERSION
+RUN --mount=type=cache,target=/root/.cache/uv \
+  if [ -z "$TEST_ONLY_IGNORE_POETRY_LOCKFILE" ]; then \
+    uvx --with poetry-plugin-export==1.9.0 \
+        poetry@${POETRY_VERSION} export --extras all -o /synapse/requirements.txt ${TEST_ONLY_SKIP_DEP_HASH_VERIFICATION:+--without-hashes}; \
   else \
-  touch /synapse/requirements.txt; \
+    touch /synapse/requirements.txt; \
   fi
 
 ###
 ### Stage 1: builder
 ###
-FROM docker.io/library/python:${PYTHON_VERSION}-slim-bookworm AS builder
-
-# install the OS build deps
-RUN \
-  --mount=type=cache,target=/var/cache/apt,sharing=locked \
-  --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  apt-get update -qq && apt-get install -yqq \
-  build-essential \
-  libffi-dev \
-  libjpeg-dev \
-  libpq-dev \
-  libssl-dev \
-  libwebp-dev \
-  libxml++2.6-dev \
-  libxslt1-dev \
-  openssl \
-  zlib1g-dev \
-  git \
-  curl \
-  libicu-dev \
-  pkg-config \
-  && rm -rf /var/lib/apt/lists/*
+FROM ghcr.io/astral-sh/uv:python${PYTHON_VERSION}-${DEBIAN_VERSION} AS builder
 
+# This silences a warning as uv isn't able to do hardlinks between its cache
+# (mounted as --mount=type=cache) and the target directory.
+ENV UV_LINK_MODE=copy
 
 # Install rust and ensure its in the PATH
 ENV RUSTUP_HOME=/rust
@@ -119,7 +79,6 @@ RUN mkdir /rust /cargo
 
 RUN curl -sSf https://sh.rustup.rs | sh -s -- -y --no-modify-path --default-toolchain stable --profile minimal
 
-
 # arm64 builds consume a lot of memory if `CARGO_NET_GIT_FETCH_WITH_CLI` is not
 # set to true, so we expose it as a build-arg.
 ARG CARGO_NET_GIT_FETCH_WITH_CLI=false
@@ -131,8 +90,8 @@ ENV CARGO_NET_GIT_FETCH_WITH_CLI=$CARGO_NET_GIT_FETCH_WITH_CLI
 #
 # This is aiming at installing the `[tool.poetry.depdendencies]` from pyproject.toml.
 COPY --from=requirements /synapse/requirements.txt /synapse/
-RUN --mount=type=cache,target=/root/.cache/pip \
-  pip install --prefix="/install" --no-deps --no-warn-script-location -r /synapse/requirements.txt
+RUN --mount=type=cache,target=/root/.cache/uv \
+  uv pip install --prefix="/install" --no-deps -r /synapse/requirements.txt
 
 # Copy over the rest of the synapse source code.
 COPY synapse /synapse/synapse/
@@ -146,41 +105,85 @@ ARG TEST_ONLY_IGNORE_POETRY_LOCKFILE
 # Install the synapse package itself.
 # If we have populated requirements.txt, we don't install any dependencies
 # as we should already have those from the previous `pip install` step.
-RUN --mount=type=cache,target=/synapse/target,sharing=locked \
+RUN \
+  --mount=type=cache,target=/root/.cache/uv \
+  --mount=type=cache,target=/synapse/target,sharing=locked \
   --mount=type=cache,target=${CARGO_HOME}/registry,sharing=locked \
   if [ -z "$TEST_ONLY_IGNORE_POETRY_LOCKFILE" ]; then \
-  pip install --prefix="/install" --no-deps --no-warn-script-location /synapse[all]; \
+    uv pip install --prefix="/install" --no-deps /synapse[all]; \
   else \
-  pip install --prefix="/install" --no-warn-script-location /synapse[all]; \
+    uv pip install --prefix="/install" /synapse[all]; \
   fi
 
 ###
-### Stage 2: runtime
+### Stage 2: runtime dependencies download for ARM64 and AMD64
+###
+FROM --platform=$BUILDPLATFORM docker.io/library/debian:${DEBIAN_VERSION} AS runtime-deps
+
+# Tell apt to keep downloaded package files, as we're using cache mounts.
+RUN rm -f /etc/apt/apt.conf.d/docker-clean; echo 'Binary::apt::APT::Keep-Downloaded-Packages "true";' > /etc/apt/apt.conf.d/keep-cache
+
+# Add both target architectures
+RUN dpkg --add-architecture arm64
+RUN dpkg --add-architecture amd64
+
+# Fetch the runtime dependencies debs for both architectures
+# We do that by building a recursive list of packages we need to download with `apt-cache depends`
+# and then downloading them with `apt-get download`.
+RUN \
+  --mount=type=cache,target=/var/cache/apt,sharing=locked \
+  --mount=type=cache,target=/var/lib/apt,sharing=locked \
+  apt-get update -qq && \
+  apt-get install -y --no-install-recommends rsync && \
+  apt-cache depends --recurse --no-recommends --no-suggests --no-conflicts --no-breaks --no-replaces --no-enhances --no-pre-depends \
+      curl \
+      gosu \
+      libjpeg62-turbo \
+      libpq5 \
+      libwebp7 \
+      xmlsec1 \
+      libjemalloc2 \
+      libicu \
+    | grep '^\w' > /tmp/pkg-list && \
+  for arch in arm64 amd64; do \
+    mkdir -p /tmp/debs-${arch} && \
+    cd /tmp/debs-${arch} && \
+    apt-get download $(sed "s/$/:${arch}/" /tmp/pkg-list); \
+  done
+
+# Extract the debs for each architecture
+# On the runtime image, /lib is a symlink to /usr/lib, so we need to copy the
+# libraries to the right place, else the `COPY` won't work.
+# On amd64, we'll also have a /lib64 folder with ld-linux-x86-64.so.2, which is
+# already present in the runtime image.
+RUN \
+  for arch in arm64 amd64; do \
+    mkdir -p /install-${arch}/var/lib/dpkg/status.d/ && \
+    for deb in /tmp/debs-${arch}/*.deb; do \
+      package_name=$(dpkg-deb -I ${deb} | awk '/^ Package: .*$/ {print $2}'); \
+      echo "Extracting: ${package_name}"; \
+      dpkg --ctrl-tarfile $deb | tar -Ox ./control > /install-${arch}/var/lib/dpkg/status.d/${package_name}; \
+      dpkg --extract $deb /install-${arch}; \
+    done; \
+    rsync -avr /install-${arch}/lib/ /install-${arch}/usr/lib; \
+    rm -rf /install-${arch}/lib /install-${arch}/lib64; \
+  done
+
+
+###
+### Stage 3: runtime
 ###
 
-FROM docker.io/library/python:${PYTHON_VERSION}-slim-bookworm
+FROM docker.io/library/python:${PYTHON_VERSION}-slim-${DEBIAN_VERSION}
+
+ARG TARGETARCH
 
 LABEL org.opencontainers.image.url='https://matrix.org/docs/projects/server/synapse'
 LABEL org.opencontainers.image.documentation='https://github.com/element-hq/synapse/blob/master/docker/README.md'
 LABEL org.opencontainers.image.source='https://github.com/element-hq/synapse.git'
 LABEL org.opencontainers.image.licenses='AGPL-3.0-or-later'
 
-RUN \
-  --mount=type=cache,target=/var/cache/apt,sharing=locked \
-  --mount=type=cache,target=/var/lib/apt,sharing=locked \
-  apt-get update -qq && apt-get install -yqq \
-  curl \
-  gosu \
-  libjpeg62-turbo \
-  libpq5 \
-  libwebp7 \
-  xmlsec1 \
-  libjemalloc2 \
-  libicu72 \
-  libssl-dev \
-  openssl \
-  && rm -rf /var/lib/apt/lists/*
-
+COPY --from=runtime-deps /install-${TARGETARCH} /
 COPY --from=builder /install /usr/local
 COPY ./docker/start.py /start.py
 COPY ./docker/conf /conf
diff --git a/docker/README.md b/docker/README.md
index 8dba6fdb05..3438e9c441 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -114,6 +114,9 @@ The following environment variables are supported in `run` mode:
   is set via `docker run --user`, defaults to `991`, `991`. Note that this user
   must have permission to read the config files, and write to the data directories.
 * `TZ`: the [timezone](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) the container will run with. Defaults to `UTC`.
+* `SYNAPSE_HTTP_PROXY`: Passed through to the Synapse process as the `http_proxy` environment variable.
+* `SYNAPSE_HTTPS_PROXY`: Passed through to the Synapse process as the `https_proxy` environment variable.
+* `SYNAPSE_NO_PROXY`: Passed through to the Synapse process as `no_proxy` environment variable.
 
 For more complex setups (e.g. for workers) you can also pass your args directly to synapse using `run` mode. For example like this:
 
diff --git a/docker/complement/conf/workers-shared-extra.yaml.j2 b/docker/complement/conf/workers-shared-extra.yaml.j2
index b9334cc53b..9ab8fedcae 100644
--- a/docker/complement/conf/workers-shared-extra.yaml.j2
+++ b/docker/complement/conf/workers-shared-extra.yaml.j2
@@ -7,6 +7,7 @@
 #}
 
 ## Server ##
+public_baseurl: http://127.0.0.1:8008/
 report_stats: False
 trusted_key_servers: []
 enable_registration: true
@@ -84,6 +85,18 @@ rc_invites:
   per_user:
     per_second: 1000
     burst_count: 1000
+  per_issuer:
+    per_second: 1000
+    burst_count: 1000
+
+rc_presence:
+  per_user:
+    per_second: 9999
+    burst_count: 9999
+
+rc_delayed_event_mgmt:
+  per_second: 9999
+  burst_count: 9999
 
 federation_rr_transactions_per_room_per_second: 9999
 
@@ -104,6 +117,16 @@ experimental_features:
   msc3967_enabled: true
   # Expose a room summary for public rooms
   msc3266_enabled: true
+  # Send to-device messages to application services
+  msc2409_to_device_messages_enabled: true
+  # Allow application services to masquerade devices
+  msc3202_device_masquerading: true
+  # Sending device list changes, one-time key counts and fallback key usage to application services
+  msc3202_transaction_extensions: true
+  # Proxy OTK claim requests to exclusive ASes
+  msc3983_appservice_otk_claims: true
+  # Proxy key queries to exclusive ASes
+  msc3984_appservice_key_query: true
 
 server_notices:
   system_mxid_localpart: _server
@@ -120,4 +143,9 @@ caches:
   sync_response_cache_duration: 0
 
 
+# Complement assumes that it can publish to the room list by default.
+room_list_publication_rules:
+  - action: allow
+
+
 {% include "shared-orig.yaml.j2" %}
diff --git a/docker/conf-workers/nginx.conf.j2 b/docker/conf-workers/nginx.conf.j2
index d1e02af723..95d2f760d2 100644
--- a/docker/conf-workers/nginx.conf.j2
+++ b/docker/conf-workers/nginx.conf.j2
@@ -38,10 +38,13 @@ server {
 {% if using_unix_sockets %}
         proxy_pass http://unix:/run/main_public.sock;
 {% else %}
+        # note: do not add a path (even a single /) after the port in `proxy_pass`,
+        # otherwise nginx will canonicalise the URI and cause signature verification
+        # errors.
         proxy_pass http://localhost:8080;
 {% endif %}
         proxy_set_header X-Forwarded-For $remote_addr;
         proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_set_header Host $host;
+        proxy_set_header Host $host:$server_port;
     }
 }
diff --git a/docker/conf-workers/synapse.supervisord.conf.j2 b/docker/conf-workers/synapse.supervisord.conf.j2
index 481eb4fc92..4fb11b259e 100644
--- a/docker/conf-workers/synapse.supervisord.conf.j2
+++ b/docker/conf-workers/synapse.supervisord.conf.j2
@@ -1,5 +1,6 @@
 {% if use_forking_launcher %}
 [program:synapse_fork]
+environment=http_proxy="%(ENV_SYNAPSE_HTTP_PROXY)s",https_proxy="%(ENV_SYNAPSE_HTTPS_PROXY)s",no_proxy="%(ENV_SYNAPSE_NO_PROXY)s"
 command=/usr/local/bin/python -m synapse.app.complement_fork_starter
   {{ main_config_path }}
   synapse.app.homeserver
@@ -20,6 +21,7 @@ exitcodes=0
 
 {% else %}
 [program:synapse_main]
+environment=http_proxy="%(ENV_SYNAPSE_HTTP_PROXY)s",https_proxy="%(ENV_SYNAPSE_HTTPS_PROXY)s",no_proxy="%(ENV_SYNAPSE_NO_PROXY)s"
 command=/usr/local/bin/prefix-log /usr/local/bin/python -m synapse.app.homeserver
   --config-path="{{ main_config_path }}"
   --config-path=/conf/workers/shared.yaml
@@ -36,6 +38,7 @@ exitcodes=0
 
   {% for worker in workers %}
 [program:synapse_{{ worker.name }}]
+environment=http_proxy="%(ENV_SYNAPSE_HTTP_PROXY)s",https_proxy="%(ENV_SYNAPSE_HTTPS_PROXY)s",no_proxy="%(ENV_SYNAPSE_NO_PROXY)s"
 command=/usr/local/bin/prefix-log /usr/local/bin/python -m {{ worker.app }}
   --config-path="{{ main_config_path }}"
   --config-path=/conf/workers/shared.yaml
diff --git a/docker/configure_workers_and_start.py b/docker/configure_workers_and_start.py
index 15d8d7b558..6d73e8feaa 100755
--- a/docker/configure_workers_and_start.py
+++ b/docker/configure_workers_and_start.py
@@ -1099,6 +1099,13 @@ def main(args: List[str], environ: MutableMapping[str, str]) -> None:
     else:
         log("Could not find %s, will not use" % (jemallocpath,))
 
+    # Empty strings are falsy in Python so this default is fine. We just can't have these
+    # be undefined because supervisord will complain about our
+    # `%(ENV_SYNAPSE_HTTP_PROXY)s` usage.
+    environ.setdefault("SYNAPSE_HTTP_PROXY", "")
+    environ.setdefault("SYNAPSE_HTTPS_PROXY", "")
+    environ.setdefault("SYNAPSE_NO_PROXY", "")
+
     # Start supervisord, which will start Synapse, all of the configured worker
     # processes, redis, nginx etc. according to the config we created above.
     log("Starting supervisord")
diff --git a/docs/admin_api/event_reports.md b/docs/admin_api/event_reports.md
index 83f7dc37f4..9075e92882 100644
--- a/docs/admin_api/event_reports.md
+++ b/docs/admin_api/event_reports.md
@@ -60,10 +60,11 @@ paginate through.
   anything other than the return value of `next_token` from a previous call. Defaults to `0`.
 * `dir`: string - Direction of event report order. Whether to fetch the most recent
   first (`b`) or the oldest first (`f`). Defaults to `b`.
-* `user_id`: string - Is optional and filters to only return users with user IDs that
-  contain this value. This is the user who reported the event and wrote the reason.
-* `room_id`: string - Is optional and filters to only return rooms with room IDs that
-  contain this value.
+* `user_id`: optional string - Filter by the user ID of the reporter. This is the user who reported the event
+   and wrote the reason.
+* `room_id`: optional string - Filter by room id.
+* `event_sender_user_id`: optional string - Filter by the sender of the reported event. This is the user who 
+   the report was made against.
 
 **Response**
 
diff --git a/docs/admin_api/rooms.md b/docs/admin_api/rooms.md
index 8e3a367e90..bfc2cd4376 100644
--- a/docs/admin_api/rooms.md
+++ b/docs/admin_api/rooms.md
@@ -385,6 +385,13 @@ The API is:
 GET /_synapse/admin/v1/rooms/<room_id>/state
 ```
 
+**Parameters**
+
+The following query parameter is available:
+
+* `type` - The type of room state event to filter by, eg "m.room.create". If provided, only state events
+    of this type will be returned (regardless of their `state_key` value).
+
 A response body like the following is returned:
 
 ```json
diff --git a/docs/admin_api/user_admin_api.md b/docs/admin_api/user_admin_api.md
index 96a2994b7b..875876081f 100644
--- a/docs/admin_api/user_admin_api.md
+++ b/docs/admin_api/user_admin_api.md
@@ -40,6 +40,7 @@ It returns a JSON body like the following:
     "erased": false,
     "shadow_banned": 0,
     "creation_ts": 1560432506,
+    "last_seen_ts": 1732919539393,
     "appservice_id": null,
     "consent_server_notice_sent": null,
     "consent_version": null,
@@ -55,7 +56,8 @@ It returns a JSON body like the following:
         }
     ],
     "user_type": null,
-    "locked": false
+    "locked": false,
+    "suspended": false
 }
 ```
 
@@ -412,6 +414,32 @@ The following actions are **NOT** performed. The list may be incomplete.
 - Remove from monthly active users
 - Remove user's consent information (consent version and timestamp)
 
+## Suspend/Unsuspend Account
+
+This API allows an admin to suspend/unsuspend an account. While an account is suspended, the user is 
+prohibited from sending invites, joining or knocking on rooms, sending messages, changing profile data, and redacting messages other than their own. 
+
+The api is:
+
+```
+PUT /_synapse/admin/v1/suspend/<user_id>
+```
+
+with a body of:
+
+```json
+{
+    "suspend": true
+}
+```
+
+To unsuspend a user, use the same endpoint with a body of:
+```json
+{
+  "suspend": false
+}
+```
+
 ## Reset password
 
 **Note:** This API is disabled when MSC3861 is enabled. [See #15582](https://github.com/matrix-org/synapse/pull/15582)
@@ -476,9 +504,9 @@ with a body of:
 }
 ```
 
-## List room memberships of a user
+## List joined rooms of a user
 
-Gets a list of all `room_id` that a specific `user_id` is member.
+Gets a list of all `room_id` that a specific `user_id` is joined to and is a member of (participating in).
 
 The API is:
 
@@ -515,6 +543,73 @@ The following fields are returned in the JSON response body:
 - `joined_rooms` - An array of `room_id`.
 - `total` - Number of rooms.
 
+## Get the number of invites sent by the user
+
+Fetches the number of invites sent by the provided user ID across all rooms
+after the given timestamp.
+
+```
+GET /_synapse/admin/v1/users/$user_id/sent_invite_count
+```
+
+**Parameters**
+
+The following parameters should be set in the URL:
+
+* `user_id`: fully qualified: for example, `@user:server.com`
+
+The following should be set as query parameters in the URL:
+
+* `from_ts`: int, required. A timestamp in ms from the unix epoch. Only
+   invites sent at or after the provided timestamp will be returned.
+   This works by comparing the provided timestamp to the `received_ts`
+   column in the `events` table.
+   Note: https://currentmillis.com/ is a useful tool for converting dates
+   into timestamps and vice versa.
+
+A response body like the following is returned:
+
+```json
+{
+  "invite_count": 30
+}
+```
+
+_Added in Synapse 1.122.0_
+
+## Get the cumulative number of rooms a user has joined after a given timestamp
+
+Fetches the number of rooms that the user joined after the given timestamp, even
+if they have subsequently left/been banned from those rooms.
+
+```
+GET /_synapse/admin/v1/users/$<user_id/cumulative_joined_room_count
+```
+
+**Parameters**
+
+The following parameters should be set in the URL:
+
+* `user_id`: fully qualified: for example, `@user:server.com`
+
+The following should be set as query parameters in the URL:
+
+* `from_ts`: int, required. A timestamp in ms from the unix epoch. Only
+   invites sent at or after the provided timestamp will be returned.
+   This works by comparing the provided timestamp to the `received_ts`
+   column in the `events` table.
+   Note: https://currentmillis.com/ is a useful tool for converting dates
+   into timestamps and vice versa.
+
+A response body like the following is returned:
+
+```json
+{
+  "cumulative_joined_room_count": 30
+}
+```
+_Added in Synapse 1.122.0_
+
 ## Account Data
 Gets information about account data for a specific `user_id`.
 
@@ -1399,13 +1494,13 @@ The following JSON body parameter must be provided:
 -  `rooms` - A list of rooms to redact the user's events in. If an empty list is provided all events in all rooms
   the user is a member of will be redacted
 
-_Added in Synapse 1.116.0._
-
 The following JSON body parameters are optional:
 
 - `reason` - Reason the redaction is being requested, ie "spam", "abuse", etc. This will be included in each redaction event, and be visible to users.
 - `limit` - a limit on the number of the user's events to search for ones that can be redacted (events are redacted newest to oldest) in each room, defaults to 1000 if not provided
 
+_Added in Synapse 1.116.0._
+
 
 ## Check the status of a redaction process
 
@@ -1443,4 +1538,6 @@ The following fields are returned in the JSON response body:
 - `failed_redactions` - dictionary - the keys of the dict are event ids the process was unable to redact, if any, and the values are 
   the corresponding error that caused the redaction to fail
 
-_Added in Synapse 1.116.0._
\ No newline at end of file
+_Added in Synapse 1.116.0._
+
+
diff --git a/docs/changelogs/CHANGES-2023.md b/docs/changelogs/CHANGES-2023.md
new file mode 100644
index 0000000000..9b6ad3de1b
--- /dev/null
+++ b/docs/changelogs/CHANGES-2023.md
@@ -0,0 +1,2202 @@
+# Synapse 1.98.0 (2023-12-12)
+
+Synapse 1.98.0 will be the last Synapse release in 2023; the regular release cadence will resume in January 2024.
+
+Synapse will soon be forked by Element under an AGPLv3.0 licence (with CLA, for
+proprietary dual licensing). You can read more about this here:
+
+ - https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
+ - https://element.io/blog/element-to-adopt-agplv3/
+
+The Matrix.org Foundation copy of the project will be archived. Any changes needed
+by server administrators will be communicated via our usual announcements channels,
+but we are striving to make this as seamless as possible.
+
+
+No significant changes since 1.98.0rc1.
+
+
+
+# Synapse 1.98.0rc1 (2023-12-05)
+
+### Features
+
+- Synapse now declares support for Matrix v1.7, v1.8, and v1.9. ([\#16707](https://github.com/matrix-org/synapse/issues/16707))
+- Add `on_user_login` [module API](https://matrix-org.github.io/synapse/latest/modules/writing_a_module.html) callback for when a user logs in. ([\#15207](https://github.com/matrix-org/synapse/issues/15207))
+- Support [MSC4069: Inhibit profile propagation](https://github.com/matrix-org/matrix-spec-proposals/pull/4069). ([\#16636](https://github.com/matrix-org/synapse/issues/16636))
+- Restore tracking of requests and monthly active users when delegating authentication via [MSC3861](https://github.com/matrix-org/synapse/pull/16672) to an OIDC provider. ([\#16672](https://github.com/matrix-org/synapse/issues/16672))
+- Add an autojoin setting for server notices rooms, so users may be joined directly instead of receiving an invite. ([\#16699](https://github.com/matrix-org/synapse/issues/16699))
+- Follow redirects when downloading media over federation (per [MSC3860](https://github.com/matrix-org/matrix-spec-proposals/pull/3860)). ([\#16701](https://github.com/matrix-org/synapse/issues/16701))
+
+### Bugfixes
+
+- Enable refreshable tokens on the admin registration endpoint. ([\#16642](https://github.com/matrix-org/synapse/issues/16642))
+- Consistently bypass rate limits when using the server notice admin API. ([\#16670](https://github.com/matrix-org/synapse/issues/16670))
+- Fix a bug introduced in Synapse 1.7.2 where rooms whose power levels lacked an `events` field could not be upgraded. ([\#16725](https://github.com/matrix-org/synapse/issues/16725))
+- Fix `GET /_synapse/admin/v1/federation/destinations` [admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) returning null (instead of 0) for `retry_last_ts` and `retry_interval`. ([\#16729](https://github.com/matrix-org/synapse/issues/16729))
+
+### Improved Documentation
+
+- Add schema rollback information to documentation. ([\#16661](https://github.com/matrix-org/synapse/issues/16661))
+- Fix poetry version typo in the [contributors' guide](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html). ([\#16695](https://github.com/matrix-org/synapse/issues/16695))
+- Switch the example UNIX socket paths to `/run`. Add HAProxy example configuration for UNIX sockets. ([\#16700](https://github.com/matrix-org/synapse/issues/16700))
+- Add documentation for how to validate the configuration file with `synapse.config` script. ([\#16714](https://github.com/matrix-org/synapse/issues/16714))
+
+### Internal Changes
+
+- Clean-up unused tables. ([\#16522](https://github.com/matrix-org/synapse/issues/16522))
+- Reduce a little database load while processing state auth chains. ([\#16552](https://github.com/matrix-org/synapse/issues/16552))
+- Reduce database load of pruning old `user_ips`. ([\#16667](https://github.com/matrix-org/synapse/issues/16667))
+- Reduce DB load when forget on leave setting is disabled. ([\#16668](https://github.com/matrix-org/synapse/issues/16668))
+- Ignore `encryption_enabled_by_default_for_room_type` setting when creating server notices room, since the notices will be send unencrypted anyway. ([\#16677](https://github.com/matrix-org/synapse/issues/16677))
+- Correctly read the to-device stream ID on startup using SQLite. ([\#16682](https://github.com/matrix-org/synapse/issues/16682))
+- Reoranganise test files. ([\#16684](https://github.com/matrix-org/synapse/issues/16684))
+- Remove old full schema dumps which are no longer used. ([\#16697](https://github.com/matrix-org/synapse/issues/16697))
+- Raise poetry-core upper bound to <=1.8.1. This allows contributors to import Synapse after `poetry install`ing with Poetry 1.6 and above. Contributed by Mo Balaa. ([\#16702](https://github.com/matrix-org/synapse/issues/16702))
+- Add a workflow to try and automatically fixup linting in a PR. ([\#16704](https://github.com/matrix-org/synapse/issues/16704))
+
+
+### Updates to locked dependencies
+
+* Bump cryptography from 41.0.5 to 41.0.6. ([\#16703](https://github.com/matrix-org/synapse/issues/16703))
+* Bump cryptography from 41.0.6 to 41.0.7. ([\#16721](https://github.com/matrix-org/synapse/issues/16721))
+* Bump idna from 3.4 to 3.6. ([\#16720](https://github.com/matrix-org/synapse/issues/16720))
+* Bump jsonschema from 4.19.1 to 4.20.0. ([\#16692](https://github.com/matrix-org/synapse/issues/16692))
+* Bump matrix-org/netlify-pr-preview from 2 to 3. ([\#16719](https://github.com/matrix-org/synapse/issues/16719))
+* Bump phonenumbers from 8.13.23 to 8.13.26. ([\#16722](https://github.com/matrix-org/synapse/issues/16722))
+* Bump prometheus-client from 0.18.0 to 0.19.0. ([\#16691](https://github.com/matrix-org/synapse/issues/16691))
+* Bump pyasn1 from 0.5.0 to 0.5.1. ([\#16689](https://github.com/matrix-org/synapse/issues/16689))
+* Bump pydantic from 2.4.2 to 2.5.1. ([\#16663](https://github.com/matrix-org/synapse/issues/16663))
+* Bump pyo3 (0.19.2→0.20.0), pythonize (0.19.0→0.20.0) and pyo3-log (0.8.1→0.9.0). ([\#16673](https://github.com/matrix-org/synapse/issues/16673))
+* Bump pyopenssl from 23.2.0 to 23.3.0. ([\#16662](https://github.com/matrix-org/synapse/issues/16662))
+* Bump ruff from 0.1.4 to 0.1.6. ([\#16690](https://github.com/matrix-org/synapse/issues/16690))
+* Bump sentry-sdk from 1.32.0 to 1.35.0. ([\#16666](https://github.com/matrix-org/synapse/issues/16666))
+* Bump serde from 1.0.192 to 1.0.193. ([\#16693](https://github.com/matrix-org/synapse/issues/16693))
+* Bump sphinx-autodoc2 from 0.4.2 to 0.5.0. ([\#16723](https://github.com/matrix-org/synapse/issues/16723))
+* Bump types-jsonschema from 4.19.0.4 to 4.20.0.0. ([\#16724](https://github.com/matrix-org/synapse/issues/16724))
+* Bump types-pillow from 10.1.0.0 to 10.1.0.2. ([\#16664](https://github.com/matrix-org/synapse/issues/16664))
+* Bump types-psycopg2 from 2.9.21.15 to 2.9.21.16. ([\#16665](https://github.com/matrix-org/synapse/issues/16665))
+* Bump types-setuptools from 68.2.0.0 to 68.2.0.2. ([\#16688](https://github.com/matrix-org/synapse/issues/16688))
+
+# Synapse 1.97.0 (2023-11-28)
+
+Synapse will soon be forked by Element under an AGPLv3.0 licence (with CLA, for
+proprietary dual licensing). You can read more about this here:
+
+ - https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
+ - https://element.io/blog/element-to-adopt-agplv3/
+
+The Matrix.org Foundation copy of the project will be archived. Any changes needed
+by server administrators will be communicated via our usual announcements channels,
+but we are striving to make this as seamless as possible.
+
+
+No significant changes since 1.97.0rc1.
+
+
+# Synapse 1.97.0rc1 (2023-11-21)
+
+### Features
+
+- Add support for asynchronous uploads as defined by [MSC2246](https://github.com/matrix-org/matrix-spec-proposals/pull/2246). Contributed by @sumnerevans at @beeper. ([\#15503](https://github.com/matrix-org/synapse/issues/15503))
+- Improve the performance of some operations in multi-worker deployments. ([\#16613](https://github.com/matrix-org/synapse/issues/16613), [\#16616](https://github.com/matrix-org/synapse/issues/16616))
+
+### Bugfixes
+
+- Fix a long-standing bug where some queries updated the same row twice. Introduced in Synapse 1.57.0. ([\#16609](https://github.com/matrix-org/synapse/issues/16609))
+- Fix a long-standing bug where Synapse would not unbind third-party identifiers for Application Service users when deactivated and would not emit a compliant response. ([\#16617](https://github.com/matrix-org/synapse/issues/16617))
+- Fix sending out of order `POSITION` over replication, causing additional database load. ([\#16639](https://github.com/matrix-org/synapse/issues/16639))
+
+### Improved Documentation
+
+- Note that the option [`outbound_federation_restricted_to`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#outbound_federation_restricted_to) was added in Synapse 1.89.0, and fix a nearby formatting error. ([\#16628](https://github.com/matrix-org/synapse/issues/16628))
+- Update parameter information for the `/timestamp_to_event` admin API. ([\#16631](https://github.com/matrix-org/synapse/issues/16631))
+- Provide an example for a common encrypted media response from the admin user media API and mention possible null values. ([\#16654](https://github.com/matrix-org/synapse/issues/16654))
+
+### Internal Changes
+
+- Remove whole table locks on push rule modifications. Contributed by Nick @ Beeper (@fizzadar). ([\#16051](https://github.com/matrix-org/synapse/issues/16051))
+- Support reactor tick timings on more types of event loops. ([\#16532](https://github.com/matrix-org/synapse/issues/16532))
+- Improve type hints. ([\#16564](https://github.com/matrix-org/synapse/issues/16564), [\#16611](https://github.com/matrix-org/synapse/issues/16611), [\#16612](https://github.com/matrix-org/synapse/issues/16612))
+- Avoid executing no-op queries. ([\#16583](https://github.com/matrix-org/synapse/issues/16583))
+- Simplify persistence code to be per-room. ([\#16584](https://github.com/matrix-org/synapse/issues/16584))
+- Use standard SQL helpers in persistence code. ([\#16585](https://github.com/matrix-org/synapse/issues/16585))
+- Avoid updating the stream cache unnecessarily. ([\#16586](https://github.com/matrix-org/synapse/issues/16586))
+- Improve performance when using opentracing. ([\#16589](https://github.com/matrix-org/synapse/issues/16589))
+- Run push rule evaluator setup in parallel. ([\#16590](https://github.com/matrix-org/synapse/issues/16590))
+- Improve tests of the SQL generator. ([\#16596](https://github.com/matrix-org/synapse/issues/16596))
+- Use more generic database methods. ([\#16615](https://github.com/matrix-org/synapse/issues/16615))
+- Use `dbname` instead of the deprecated `database` connection parameter for psycopg2. ([\#16618](https://github.com/matrix-org/synapse/issues/16618))
+- Add an internal [Admin API endpoint](https://matrix-org.github.io/synapse/v1.97/usage/configuration/config_documentation.html#allow-replacing-master-cross-signing-key-without-user-interactive-auth) to temporarily grant the ability to update an existing cross-signing key without UIA. ([\#16634](https://github.com/matrix-org/synapse/issues/16634))
+- Improve references to GitHub issues. ([\#16637](https://github.com/matrix-org/synapse/issues/16637), [\#16638](https://github.com/matrix-org/synapse/issues/16638))
+- More efficiently handle no-op `POSITION` over replication. ([\#16640](https://github.com/matrix-org/synapse/issues/16640), [\#16655](https://github.com/matrix-org/synapse/issues/16655))
+- Speed up deleting of device messages when deleting a device. ([\#16643](https://github.com/matrix-org/synapse/issues/16643))
+- Speed up persisting large number of outliers. ([\#16649](https://github.com/matrix-org/synapse/issues/16649))
+- Reduce max concurrency of background tasks, reducing potential max DB load. ([\#16656](https://github.com/matrix-org/synapse/issues/16656), [\#16660](https://github.com/matrix-org/synapse/issues/16660))
+- Speed up purge room by adding an index to `event_push_summary`. ([\#16657](https://github.com/matrix-org/synapse/issues/16657))
+
+
+
+### Updates to locked dependencies
+
+* Bump prometheus-client from 0.17.1 to 0.18.0. ([\#16626](https://github.com/matrix-org/synapse/issues/16626))
+* Bump pyicu from 2.11 to 2.12. ([\#16603](https://github.com/matrix-org/synapse/issues/16603))
+* Bump requests-toolbelt from 0.10.1 to 1.0.0. ([\#16659](https://github.com/matrix-org/synapse/issues/16659))
+* Bump ruff from 0.0.292 to 0.1.4. ([\#16600](https://github.com/matrix-org/synapse/issues/16600))
+* Bump serde from 1.0.190 to 1.0.192. ([\#16627](https://github.com/matrix-org/synapse/issues/16627))
+* Bump serde_json from 1.0.107 to 1.0.108. ([\#16604](https://github.com/matrix-org/synapse/issues/16604))
+* Bump setuptools-rust from 1.8.0 to 1.8.1. ([\#16601](https://github.com/matrix-org/synapse/issues/16601))
+* Bump towncrier from 23.6.0 to 23.11.0. ([\#16622](https://github.com/matrix-org/synapse/issues/16622))
+* Bump treq from 22.2.0 to 23.11.0. ([\#16623](https://github.com/matrix-org/synapse/issues/16623))
+* Bump twisted from 23.8.0 to 23.10.0. ([\#16588](https://github.com/matrix-org/synapse/issues/16588))
+* Bump types-bleach from 6.1.0.0 to 6.1.0.1. ([\#16624](https://github.com/matrix-org/synapse/issues/16624))
+* Bump types-jsonschema from 4.19.0.3 to 4.19.0.4. ([\#16599](https://github.com/matrix-org/synapse/issues/16599))
+* Bump types-pyopenssl from 23.2.0.2 to 23.3.0.0. ([\#16625](https://github.com/matrix-org/synapse/issues/16625))
+* Bump types-pyyaml from 6.0.12.11 to 6.0.12.12. ([\#16602](https://github.com/matrix-org/synapse/issues/16602))
+
+# Synapse 1.96.1 (2023-11-17)
+
+Synapse will soon be forked by Element under an AGPLv3.0 licence (with CLA, for
+proprietary dual licensing). You can read more about this here:
+
+* https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
+* https://element.io/blog/element-to-adopt-agplv3/
+
+The Matrix.org Foundation copy of the project will be archived. Any changes needed
+by server administrators will be communicated via our usual
+[announcements channels](https://matrix.to/#/#homeowners:matrix.org), but we are
+striving to make this as seamless as possible.
+
+This minor release was needed only because of CI-related trouble on [v1.96.0](https://github.com/matrix-org/synapse/releases/tag/v1.96.0), which was never released.
+
+### Internal Changes
+
+- Fix building of wheels in CI. ([\#16653](https://github.com/matrix-org/synapse/issues/16653))
+
+# Synapse 1.96.0 (2023-11-16)
+
+### Bugfixes
+
+- Fix "'int' object is not iterable" error in `set_device_id_for_pushers` background update introduced in Synapse 1.95.0. ([\#16594](https://github.com/matrix-org/synapse/issues/16594))
+
+# Synapse 1.96.0rc1 (2023-10-31)
+
+### Features
+
+- Add experimental support to allow multiple workers to write to receipts stream. ([\#16432](https://github.com/matrix-org/synapse/issues/16432))
+- Add a new module API for controller presence. ([\#16544](https://github.com/matrix-org/synapse/issues/16544))
+- Add a new module API callback that allows adding extra fields to events' unsigned section when sent down to clients. ([\#16549](https://github.com/matrix-org/synapse/issues/16549))
+- Improve the performance of claiming encryption keys. ([\#16565](https://github.com/matrix-org/synapse/issues/16565), [\#16570](https://github.com/matrix-org/synapse/issues/16570))
+
+### Bugfixes
+
+- Fixed a bug in the example Grafana dashboard that prevents it from finding the correct datasource. Contributed by @MichaelSasser. ([\#16471](https://github.com/matrix-org/synapse/issues/16471))
+- Fix a long-standing, exceedingly rare edge case where the first event persisted by a new event persister worker might not be sent down `/sync`. ([\#16473](https://github.com/matrix-org/synapse/issues/16473), [\#16557](https://github.com/matrix-org/synapse/issues/16557), [\#16561](https://github.com/matrix-org/synapse/issues/16561), [\#16578](https://github.com/matrix-org/synapse/issues/16578), [\#16580](https://github.com/matrix-org/synapse/issues/16580))
+- Fix long-standing bug where `/sync` incorrectly did not mark a room as `limited` in a sync requests when there were missing remote events. ([\#16485](https://github.com/matrix-org/synapse/issues/16485))
+- Fix a bug introduced in Synapse 1.41 where HTTP(S) forward proxy authorization would fail when using basic HTTP authentication with a long `username:password` string. ([\#16504](https://github.com/matrix-org/synapse/issues/16504))
+- Force TLS certificate verification in user registration script. ([\#16530](https://github.com/matrix-org/synapse/issues/16530))
+- Fix long-standing bug where `/sync` could tightloop after restart when using SQLite. ([\#16540](https://github.com/matrix-org/synapse/issues/16540))
+- Fix ratelimiting of message sending when using workers, where the ratelimit would only be applied after most of the work has been done. ([\#16558](https://github.com/matrix-org/synapse/issues/16558))
+- Fix a long-standing bug where invited/knocking users would not leave during a room purge. ([\#16559](https://github.com/matrix-org/synapse/issues/16559))
+
+### Improved Documentation
+
+- Improve documentation of presence router. ([\#16529](https://github.com/matrix-org/synapse/issues/16529))
+- Add a sentence to the [opentracing docs](https://matrix-org.github.io/synapse/latest/opentracing.html) on how you can have jaeger in a different place than synapse. ([\#16531](https://github.com/matrix-org/synapse/issues/16531))
+- Correctly describe the meaning of unspecified rule lists in the [`alias_creation_rules`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#alias_creation_rules) and [`room_list_publication_rules`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#room_list_publication_rules) config options and improve their descriptions more generally. ([\#16541](https://github.com/matrix-org/synapse/issues/16541))
+- Pin the recommended poetry version in [contributors' guide](https://matrix-org.github.io/synapse/latest/development/contributing_guide.html). ([\#16550](https://github.com/matrix-org/synapse/issues/16550))
+- Fix a broken link to the [client breakdown](https://matrix.org/ecosystem/clients/) in the README. ([\#16569](https://github.com/matrix-org/synapse/issues/16569))
+
+### Internal Changes
+
+- Improve performance of delete device messages query, cf issue [16479](https://github.com/matrix-org/synapse/issues/16479). ([\#16492](https://github.com/matrix-org/synapse/issues/16492))
+- Reduce memory allocations. ([\#16505](https://github.com/matrix-org/synapse/issues/16505))
+- Improve replication performance when purging rooms. ([\#16510](https://github.com/matrix-org/synapse/issues/16510))
+- Run tests against Python 3.12. ([\#16511](https://github.com/matrix-org/synapse/issues/16511))
+- Run trial & integration tests in continuous integration when `.ci` directory is modified. ([\#16512](https://github.com/matrix-org/synapse/issues/16512))
+- Remove duplicate call to mark remote server 'awake' when using a federation sending worker. ([\#16515](https://github.com/matrix-org/synapse/issues/16515))
+- Enable dirty runs on Complement CI, which is significantly faster. ([\#16520](https://github.com/matrix-org/synapse/issues/16520))
+- Stop deleting from an unused table. ([\#16521](https://github.com/matrix-org/synapse/issues/16521))
+- Improve type hints. ([\#16526](https://github.com/matrix-org/synapse/issues/16526), [\#16551](https://github.com/matrix-org/synapse/issues/16551))
+- Fix running unit tests on Twisted trunk. ([\#16528](https://github.com/matrix-org/synapse/issues/16528))
+- Reduce some spurious logging in worker mode. ([\#16555](https://github.com/matrix-org/synapse/issues/16555))
+- Stop porting a table in port db that we're going to nuke and rebuild anyway. ([\#16563](https://github.com/matrix-org/synapse/issues/16563))
+- Deal with warnings from running complement in CI. ([\#16567](https://github.com/matrix-org/synapse/issues/16567))
+- Allow building with `setuptools_rust` 1.8.0. ([\#16574](https://github.com/matrix-org/synapse/issues/16574))
+
+### Updates to locked dependencies
+
+* Bump black from 23.10.0 to 23.10.1. ([\#16575](https://github.com/matrix-org/synapse/issues/16575))
+* Bump black from 23.9.1 to 23.10.0. ([\#16538](https://github.com/matrix-org/synapse/issues/16538))
+* Bump cryptography from 41.0.4 to 41.0.5. ([\#16572](https://github.com/matrix-org/synapse/issues/16572))
+* Bump gitpython from 3.1.37 to 3.1.40. ([\#16534](https://github.com/matrix-org/synapse/issues/16534))
+* Bump phonenumbers from 8.13.22 to 8.13.23. ([\#16576](https://github.com/matrix-org/synapse/issues/16576))
+* Bump pygithub from 1.59.1 to 2.1.1. ([\#16535](https://github.com/matrix-org/synapse/issues/16535))
+- Bump matrix-synapse-ldap3 from 0.2.2 to 0.3.0. ([\#16539](https://github.com/matrix-org/synapse/issues/16539))
+* Bump serde from 1.0.189 to 1.0.190. ([\#16577](https://github.com/matrix-org/synapse/issues/16577))
+* Bump setuptools-rust from 1.7.0 to 1.8.0. ([\#16574](https://github.com/matrix-org/synapse/issues/16574))
+* Bump types-pillow from 10.0.0.3 to 10.1.0.0. ([\#16536](https://github.com/matrix-org/synapse/issues/16536))
+* Bump types-psycopg2 from 2.9.21.14 to 2.9.21.15. ([\#16573](https://github.com/matrix-org/synapse/issues/16573))
+* Bump types-requests from 2.31.0.2 to 2.31.0.10. ([\#16537](https://github.com/matrix-org/synapse/issues/16537))
+* Bump urllib3 from 1.26.17 to 1.26.18. ([\#16516](https://github.com/matrix-org/synapse/issues/16516))
+
+# Synapse 1.95.1 (2023-10-31)
+
+## Security advisory
+
+The following issue is fixed in 1.95.1.
+
+- [GHSA-mp92-3jfm-3575](https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575) / [CVE-2023-43796](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43796) — Moderate Severity
+
+  Cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver.
+
+See the advisory for more details. If you have any questions, email security@matrix.org.
+
+
+
+# Synapse 1.95.0 (2023-10-24)
+
+### Internal Changes
+
+- Build Debian packages for [Ubuntu 23.10 Mantic Minotaur](https://canonical.com/blog/canonical-releases-ubuntu-23-10-mantic-minotaur). ([\#16524](https://github.com/matrix-org/synapse/issues/16524))
+
+
+# Synapse 1.95.0rc1 (2023-10-17)
+
+### Bugfixes
+
+- Remove legacy unspecced `knock_state_events` field returned in some responses. ([\#16403](https://github.com/matrix-org/synapse/issues/16403))
+- Fix a bug introduced in Synapse 1.81.0 where an `AttributeError` would be raised when `_matrix/client/v3/account/whoami` is called over a unix socket. Contributed by @Sir-Photch. ([\#16404](https://github.com/matrix-org/synapse/issues/16404))
+- Properly return inline media when content types have parameters. ([\#16440](https://github.com/matrix-org/synapse/issues/16440))
+- Prevent the purging of large rooms from timing out when Postgres is in use. The timeout which causes this issue was introduced in Synapse 1.88.0. ([\#16455](https://github.com/matrix-org/synapse/issues/16455))
+- Improve the performance of purging rooms, particularly encrypted rooms. ([\#16457](https://github.com/matrix-org/synapse/issues/16457))
+- Fix a bug introduced in Synapse 1.59.0 where servers could be incorrectly marked as available after an error response was received. ([\#16506](https://github.com/matrix-org/synapse/issues/16506))
+
+### Improved Documentation
+
+- Document internal background update mechanism. ([\#16420](https://github.com/matrix-org/synapse/issues/16420))
+- Fix a typo in the sql for [useful SQL for admins document](https://matrix-org.github.io/synapse/latest/usage/administration/useful_sql_for_admins.html). ([\#16477](https://github.com/matrix-org/synapse/issues/16477))
+
+### Internal Changes
+
+- Bump pyo3 from 0.17.1 to 0.19.2. ([\#16162](https://github.com/matrix-org/synapse/issues/16162))
+- Update registration of media repository URLs. ([\#16419](https://github.com/matrix-org/synapse/issues/16419))
+- Improve type hints. ([\#16421](https://github.com/matrix-org/synapse/issues/16421), [\#16468](https://github.com/matrix-org/synapse/issues/16468), [\#16469](https://github.com/matrix-org/synapse/issues/16469), [\#16507](https://github.com/matrix-org/synapse/issues/16507))
+- Refactor some code to simplify and better type receipts stream adjacent code. ([\#16426](https://github.com/matrix-org/synapse/issues/16426))
+- Factor out `MultiWriter` token from `RoomStreamToken`. ([\#16427](https://github.com/matrix-org/synapse/issues/16427))
+- Improve code comments. ([\#16428](https://github.com/matrix-org/synapse/issues/16428))
+- Reduce memory allocations. ([\#16429](https://github.com/matrix-org/synapse/issues/16429), [\#16431](https://github.com/matrix-org/synapse/issues/16431), [\#16433](https://github.com/matrix-org/synapse/issues/16433), [\#16434](https://github.com/matrix-org/synapse/issues/16434), [\#16438](https://github.com/matrix-org/synapse/issues/16438), [\#16444](https://github.com/matrix-org/synapse/issues/16444))
+- Remove unused method. ([\#16435](https://github.com/matrix-org/synapse/issues/16435))
+- Improve rate limiting logic. ([\#16441](https://github.com/matrix-org/synapse/issues/16441))
+- Do not block running of CI behind the check for sign-off on PRs. ([\#16454](https://github.com/matrix-org/synapse/issues/16454))
+- Update the release script to remind releaser to check for special release notes. ([\#16461](https://github.com/matrix-org/synapse/issues/16461))
+- Update complement.sh to match new public API shape. ([\#16466](https://github.com/matrix-org/synapse/issues/16466))
+- Clean up logging on event persister endpoints. ([\#16488](https://github.com/matrix-org/synapse/issues/16488))
+- Remove useless async job to delete device messages on sync, since we only deliver (and hence delete) up to 100 device messages at a time. ([\#16491](https://github.com/matrix-org/synapse/issues/16491))
+
+### Updates to locked dependencies
+
+* Bump bleach from 6.0.0 to 6.1.0. ([\#16451](https://github.com/matrix-org/synapse/issues/16451))
+* Bump jsonschema from 4.19.0 to 4.19.1. ([\#16500](https://github.com/matrix-org/synapse/issues/16500))
+* Bump netaddr from 0.8.0 to 0.9.0. ([\#16453](https://github.com/matrix-org/synapse/issues/16453))
+* Bump packaging from 23.1 to 23.2. ([\#16497](https://github.com/matrix-org/synapse/issues/16497))
+* Bump pillow from 10.0.1 to 10.1.0. ([\#16498](https://github.com/matrix-org/synapse/issues/16498))
+* Bump psycopg2 from 2.9.8 to 2.9.9. ([\#16452](https://github.com/matrix-org/synapse/issues/16452))
+* Bump pyo3-log from 0.8.3 to 0.8.4. ([\#16495](https://github.com/matrix-org/synapse/issues/16495))
+* Bump ruff from 0.0.290 to 0.0.292. ([\#16449](https://github.com/matrix-org/synapse/issues/16449))
+* Bump sentry-sdk from 1.31.0 to 1.32.0. ([\#16496](https://github.com/matrix-org/synapse/issues/16496))
+* Bump serde from 1.0.188 to 1.0.189. ([\#16494](https://github.com/matrix-org/synapse/issues/16494))
+* Bump types-bleach from 6.0.0.4 to 6.1.0.0. ([\#16450](https://github.com/matrix-org/synapse/issues/16450))
+* Bump types-jsonschema from 4.17.0.10 to 4.19.0.3. ([\#16499](https://github.com/matrix-org/synapse/issues/16499))
+
+# Synapse 1.94.0 (2023-10-10)
+
+No significant changes since 1.94.0rc1.
+However, please take note of the security advisory that follows.
+
+## Security advisory
+
+The following issue is fixed in 1.94.0 (and RC).
+
+- [GHSA-5chr-wjw5-3gq4](https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4) / [CVE-2023-45129](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-45129) — Moderate Severity
+
+  A malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service.
+
+  Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected.
+
+See the advisory for more details. If you have any questions, email security@matrix.org.
+
+
+# Synapse 1.94.0rc1 (2023-10-03)
+
+### Features
+
+- Render plain, CSS, CSV, JSON and common image formats in the browser (inline) when requested through the /download endpoint. ([\#15988](https://github.com/matrix-org/synapse/issues/15988))
+- Add experimental support for [MSC4028](https://github.com/matrix-org/matrix-spec-proposals/pull/4028) to push all encrypted events to clients. ([\#16361](https://github.com/matrix-org/synapse/issues/16361))
+- Minor performance improvement when sending presence to federated servers. ([\#16385](https://github.com/matrix-org/synapse/issues/16385))
+- Minor performance improvement by caching server ACL checking. ([\#16360](https://github.com/matrix-org/synapse/issues/16360))
+
+### Improved Documentation
+
+- Add developer documentation concerning gradual schema migrations with column alterations. ([\#15691](https://github.com/matrix-org/synapse/issues/15691))
+- Improve documentation of the user directory search algorithm. ([\#16320](https://github.com/matrix-org/synapse/issues/16320))
+- Fix rendering of user admin API documentation around deactivation. This was broken in Synapse 1.91.0. ([\#16355](https://github.com/matrix-org/synapse/issues/16355))
+- Update documentation around message retention policies. ([\#16382](https://github.com/matrix-org/synapse/issues/16382))
+- Add note to `federation_domain_whitelist` config option to clarify its usage. ([\#16416](https://github.com/matrix-org/synapse/issues/16416))
+- Improve legacy release notes. ([\#16418](https://github.com/matrix-org/synapse/issues/16418))
+
+### Deprecations and Removals
+
+- Remove Python version from `/_synapse/admin/v1/server_version`. ([\#16380](https://github.com/matrix-org/synapse/issues/16380))
+
+### Internal Changes
+
+- Avoid running CI steps when the files they check have not been changed. ([\#14745](https://github.com/matrix-org/synapse/issues/14745), [\#16387](https://github.com/matrix-org/synapse/issues/16387))
+- Improve type hints. ([\#14911](https://github.com/matrix-org/synapse/issues/14911), [\#16350](https://github.com/matrix-org/synapse/issues/16350), [\#16356](https://github.com/matrix-org/synapse/issues/16356), [\#16395](https://github.com/matrix-org/synapse/issues/16395))
+- Added support for pydantic v2 in addition to pydantic v1. Contributed by Maxwell G (@gotmax23). ([\#16332](https://github.com/matrix-org/synapse/issues/16332))
+- Get CI to check PRs have been signed-off. ([\#16348](https://github.com/matrix-org/synapse/issues/16348))
+- Add missing licence header. ([\#16359](https://github.com/matrix-org/synapse/issues/16359))
+- Improve type hints, and bump types-psycopg2 from 2.9.21.11 to 2.9.21.14. ([\#16381](https://github.com/matrix-org/synapse/issues/16381))
+- Improve comments in `StateGroupBackgroundUpdateStore`. ([\#16383](https://github.com/matrix-org/synapse/issues/16383))
+- Update maturin configuration. ([\#16394](https://github.com/matrix-org/synapse/issues/16394))
+- Downgrade replication stream time out error log lines to warning. ([\#16401](https://github.com/matrix-org/synapse/issues/16401))
+
+### Updates to locked dependencies
+
+* Bump actions/checkout from 3 to 4. ([\#16250](https://github.com/matrix-org/synapse/issues/16250))
+* Bump cryptography from 41.0.3 to 41.0.4. ([\#16362](https://github.com/matrix-org/synapse/issues/16362))
+* Bump dawidd6/action-download-artifact from 2.27.0 to 2.28.0. ([\#16374](https://github.com/matrix-org/synapse/issues/16374))
+* Bump docker/setup-buildx-action from 2 to 3. ([\#16375](https://github.com/matrix-org/synapse/issues/16375))
+* Bump gitpython from 3.1.35 to 3.1.37. ([\#16376](https://github.com/matrix-org/synapse/issues/16376))
+* Bump msgpack from 1.0.5 to 1.0.6. ([\#16377](https://github.com/matrix-org/synapse/issues/16377))
+* Bump msgpack from 1.0.6 to 1.0.7. ([\#16412](https://github.com/matrix-org/synapse/issues/16412))
+* Bump phonenumbers from 8.13.19 to 8.13.22. ([\#16413](https://github.com/matrix-org/synapse/issues/16413))
+* Bump psycopg2 from 2.9.7 to 2.9.8. ([\#16409](https://github.com/matrix-org/synapse/issues/16409))
+* Bump pydantic from 2.3.0 to 2.4.2. ([\#16410](https://github.com/matrix-org/synapse/issues/16410))
+* Bump regex from 1.9.5 to 1.9.6. ([\#16408](https://github.com/matrix-org/synapse/issues/16408))
+* Bump sentry-sdk from 1.30.0 to 1.31.0. ([\#16378](https://github.com/matrix-org/synapse/issues/16378))
+* Bump types-netaddr from 0.8.0.9 to 0.9.0.1. ([\#16411](https://github.com/matrix-org/synapse/issues/16411))
+* Bump types-psycopg2 from 2.9.21.11 to 2.9.21.14. ([\#16381](https://github.com/matrix-org/synapse/issues/16381))
+* Bump urllib3 from 1.26.15 to 1.26.17. ([\#16422](https://github.com/matrix-org/synapse/issues/16422))
+
+# Synapse 1.93.0 (2023-09-26)
+
+No significant changes since 1.93.0rc1.
+
+
+## Security advisory
+
+The following issues are fixed in 1.93.0 (and RCs).
+
+- [GHSA-4f74-84v3-j9q5](https://github.com/matrix-org/synapse/security/advisories/GHSA-4f74-84v3-j9q5) / [CVE-2023-41335](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-41335) — Low Severity
+
+  Temporary storage of plaintext passwords during password changes.
+
+- [GHSA-7565-cq32-vx2x](https://github.com/matrix-org/synapse/security/advisories/GHSA-7565-cq32-vx2x) / [CVE-2023-42453](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42453) — Low Severity
+
+  Improper validation of receipts allows forged read receipts.
+
+See the advisories for more details. If you have any questions, email security@matrix.org.
+
+
+# Synapse 1.93.0rc1 (2023-09-19)
+
+### Features
+
+- Add automatic purge after all users have forgotten a room. ([\#15488](https://github.com/matrix-org/synapse/issues/15488))
+- Restore room purge/shutdown after a Synapse restart. ([\#15488](https://github.com/matrix-org/synapse/issues/15488))
+- Support resolving homeservers using `matrix-fed` DNS SRV records from [MSC4040](https://github.com/matrix-org/matrix-spec-proposals/pull/4040). ([\#16137](https://github.com/matrix-org/synapse/issues/16137))
+- Add the ability to use `G` (GiB) and `T` (TiB) suffixes in configuration options that refer to numbers of bytes. ([\#16219](https://github.com/matrix-org/synapse/issues/16219))
+- Add span information to requests sent to appservices. Contributed by MTRNord. ([\#16227](https://github.com/matrix-org/synapse/issues/16227))
+- Add the ability to enable/disable registrations when using CAS. Contributed by Aurélien Grimpard. ([\#16262](https://github.com/matrix-org/synapse/issues/16262))
+- Allow the `/notifications` endpoint to be routed to workers. ([\#16265](https://github.com/matrix-org/synapse/issues/16265))
+- Enable users to easily unsubscribe to notifications emails via the `List-Unsubscribe` header. ([\#16274](https://github.com/matrix-org/synapse/issues/16274))
+- Report whether a user is `locked` in the [List Accounts admin API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html#list-accounts), and exclude locked users by default. ([\#16328](https://github.com/matrix-org/synapse/issues/16328))
+
+### Bugfixes
+
+- Fix a long-standing bug where multi-device accounts could cause high load due to presence. ([\#16066](https://github.com/matrix-org/synapse/issues/16066), [\#16170](https://github.com/matrix-org/synapse/issues/16170), [\#16171](https://github.com/matrix-org/synapse/issues/16171), [\#16172](https://github.com/matrix-org/synapse/issues/16172), [\#16174](https://github.com/matrix-org/synapse/issues/16174))
+- Fix a long-standing bug where appservices using [MSC2409](https://github.com/matrix-org/matrix-spec-proposals/pull/2409) to receive `to_device` messages would only get messages for one user. ([\#16251](https://github.com/matrix-org/synapse/issues/16251))
+- Fix bug when using workers where Synapse could end up re-requesting the same remote device repeatedly. ([\#16252](https://github.com/matrix-org/synapse/issues/16252))
+- Fix long-standing bug where we kept re-requesting a remote server's key repeatedly, potentially causing delays in receiving events over federation. ([\#16257](https://github.com/matrix-org/synapse/issues/16257))
+- Avoid temporary storage of sensitive information. ([\#16272](https://github.com/matrix-org/synapse/issues/16272))
+- Fix bug introduced in Synapse 1.49.0 when using dehydrated devices ([MSC2697](https://github.com/matrix-org/matrix-spec-proposals/pull/2697)) and refresh tokens. Contributed by Hanadi. ([\#16288](https://github.com/matrix-org/synapse/issues/16288))
+- Fix a long-standing bug where invalid receipts would be accepted. ([\#16327](https://github.com/matrix-org/synapse/issues/16327))
+- Use standard name for UTF-8 charset in emails. ([\#16329](https://github.com/matrix-org/synapse/issues/16329))
+- Don't try refetching device lists for users on remote hosts that are marked as "down". ([\#16298](https://github.com/matrix-org/synapse/issues/16298))
+
+### Improved Documentation
+
+- Fix typos in the documentation. ([\#16282](https://github.com/matrix-org/synapse/issues/16282))
+- Link to the Alpine Linux community package for Synapse. ([\#16304](https://github.com/matrix-org/synapse/issues/16304))
+- Use string for `federation_client_minimum_tls_version` documentation examples. Contributed by @jcgruenhage. ([\#16353](https://github.com/matrix-org/synapse/issues/16353))
+
+### Internal Changes
+
+- Allow modules to delete rooms. ([\#15997](https://github.com/matrix-org/synapse/issues/15997))
+- Add GCC and GNU Make to the Nix flake development environment so that `ruff` can be compiled. ([\#16090](https://github.com/matrix-org/synapse/issues/16090), [\#16263](https://github.com/matrix-org/synapse/issues/16263))
+- Fix type checking when using the new version of Twisted. ([\#16235](https://github.com/matrix-org/synapse/issues/16235))
+- Delete device messages asynchronously and in staged batches using the task scheduler. ([\#16240](https://github.com/matrix-org/synapse/issues/16240), [\#16311](https://github.com/matrix-org/synapse/issues/16311), [\#16312](https://github.com/matrix-org/synapse/issues/16312), [\#16313](https://github.com/matrix-org/synapse/issues/16313))
+- Bump minimum supported Rust version to 1.61.0. ([\#16248](https://github.com/matrix-org/synapse/issues/16248))
+- Update rust to version 1.71.1 in the nix development environment. ([\#16260](https://github.com/matrix-org/synapse/issues/16260))
+- Simplify server key storage. ([\#16261](https://github.com/matrix-org/synapse/issues/16261))
+- Reduce CPU overhead of change password endpoint. ([\#16264](https://github.com/matrix-org/synapse/issues/16264))
+- Stop purging from tables slated for removal. ([\#16273](https://github.com/matrix-org/synapse/issues/16273))
+- Improve type hints. ([\#16276](https://github.com/matrix-org/synapse/issues/16276), [\#16301](https://github.com/matrix-org/synapse/issues/16301), [\#16325](https://github.com/matrix-org/synapse/issues/16325), [\#16326](https://github.com/matrix-org/synapse/issues/16326))
+- Raise `setuptools_rust` version cap to 1.7.0. ([\#16277](https://github.com/matrix-org/synapse/issues/16277))
+- Fix using the new task scheduler causing lots of CPU to be used. ([\#16278](https://github.com/matrix-org/synapse/issues/16278))
+- Upgrade CI run of Python 3.12 from rc1 to rc2. ([\#16280](https://github.com/matrix-org/synapse/issues/16280))
+- Include values in SQL debug when using `execute_values` with Postgres. ([\#16281](https://github.com/matrix-org/synapse/issues/16281))
+- Enable additional linting checks. ([\#16283](https://github.com/matrix-org/synapse/issues/16283))
+- Refactor `receipts_graph` Postgres transactions to stop error messages. ([\#16299](https://github.com/matrix-org/synapse/issues/16299))
+- Small improvements to logging in replication code. ([\#16309](https://github.com/matrix-org/synapse/issues/16309))
+- Remove a reference cycle in background processes. ([\#16314](https://github.com/matrix-org/synapse/issues/16314))
+- Only use literal strings for background process names. ([\#16315](https://github.com/matrix-org/synapse/issues/16315))
+- Refactor `get_user_by_id`. ([\#16316](https://github.com/matrix-org/synapse/issues/16316))
+- Speed up task to delete to-device messages. ([\#16318](https://github.com/matrix-org/synapse/issues/16318))
+- Avoid patching code in tests. ([\#16349](https://github.com/matrix-org/synapse/issues/16349))
+- Test against PostgreSQL 16. ([\#16351](https://github.com/matrix-org/synapse/issues/16351))
+
+### Updates to locked dependencies
+
+* Bump mypy from 1.4.1 to 1.5.1. ([\#16300](https://github.com/matrix-org/synapse/issues/16300))
+* Bump black from 23.7.0 to 23.9.1. ([\#16295](https://github.com/matrix-org/synapse/issues/16295))
+* Bump docker/build-push-action from 4 to 5. ([\#16336](https://github.com/matrix-org/synapse/issues/16336))
+* Bump docker/login-action from 2 to 3. ([\#16339](https://github.com/matrix-org/synapse/issues/16339))
+* Bump docker/metadata-action from 4 to 5. ([\#16337](https://github.com/matrix-org/synapse/issues/16337))
+* Bump docker/setup-qemu-action from 2 to 3. ([\#16338](https://github.com/matrix-org/synapse/issues/16338))
+* Bump furo from 2023.8.19 to 2023.9.10. ([\#16340](https://github.com/matrix-org/synapse/issues/16340))
+* Bump gitpython from 3.1.32 to 3.1.35. ([\#16267](https://github.com/matrix-org/synapse/issues/16267), [\#16279](https://github.com/matrix-org/synapse/issues/16279))
+* Bump mypy-zope from 1.0.0 to 1.0.1. ([\#16291](https://github.com/matrix-org/synapse/issues/16291))
+* Bump pillow from 10.0.0 to 10.0.1. ([\#16344](https://github.com/matrix-org/synapse/issues/16344))
+* Bump regex from 1.9.4 to 1.9.5. ([\#16233](https://github.com/matrix-org/synapse/issues/16233))
+* Bump ruff from 0.0.286 to 0.0.290. ([\#16342](https://github.com/matrix-org/synapse/issues/16342))
+* Bump serde_json from 1.0.105 to 1.0.107. ([\#16296](https://github.com/matrix-org/synapse/issues/16296), [\#16345](https://github.com/matrix-org/synapse/issues/16345))
+* Bump twisted from 22.10.0 to 23.8.0. ([\#16235](https://github.com/matrix-org/synapse/issues/16235))
+* Bump types-pillow from 10.0.0.2 to 10.0.0.3. ([\#16293](https://github.com/matrix-org/synapse/issues/16293))
+* Bump types-setuptools from 68.0.0.3 to 68.2.0.0. ([\#16292](https://github.com/matrix-org/synapse/issues/16292))
+* Bump typing-extensions from 4.7.1 to 4.8.0. ([\#16341](https://github.com/matrix-org/synapse/issues/16341))
+
+# Synapse 1.92.3 (2023-09-18)
+
+This is again a security update targeted at mitigating [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863).
+It turns out that libwebp is bundled statically in Pillow wheels so we need to update this dependency instead of
+libwebp package at the OS level.
+
+Unlike what was advertised in 1.92.2 changelog this release also impacts PyPI wheels and Debian packages from matrix.org.
+
+We encourage admins to upgrade as soon as possible.
+
+
+### Internal Changes
+
+- Pillow 10.0.1 is now mandatory because of libwebp CVE-2023-4863, since Pillow provides libwebp in the wheels. ([\#16347](https://github.com/matrix-org/synapse/issues/16347))
+
+### Updates to locked dependencies
+
+* Bump pillow from 10.0.0 to 10.0.1. ([\#16344](https://github.com/matrix-org/synapse/issues/16344))
+
+# Synapse 1.92.2 (2023-09-15)
+
+This is a Docker-only update to mitigate [CVE-2023-4863](https://cve.org/CVERecord?id=CVE-2023-4863), a critical vulnerability in `libwebp`. Server admins not using Docker should ensure that their `libwebp` is up to date (if installed). We encourage admins to upgrade as soon as possible.
+
+
+### Updates to the Docker image
+
+- Update docker image to use Debian bookworm as the base. ([\#16324](https://github.com/matrix-org/synapse/issues/16324))
+
+
+# Synapse 1.92.1 (2023-09-12)
+
+This minor release was needed only because of CI-related trouble on [v1.92.0](https://github.com/matrix-org/synapse/releases/tag/v1.92.0), which was never released.
+
+### Internal Changes
+
+- Stop building Ubuntu Kinetic since it is EOL and repos seem to be dead.
+
+
+# Synapse 1.92.0 (2023-09-12)
+
+This release includes the same [bugfix](https://github.com/matrix-org/synapse/issues/16258) as Synapse 1.91.2.
+
+This version was never released following a CI build failure, cf [v1.92.1 changelog](https://github.com/matrix-org/synapse/releases/tag/v1.92.1).
+
+### Bugfixes
+
+- Revert [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) introspection cache, admin impersonation and account lock. ([\#16258](https://github.com/matrix-org/synapse/issues/16258))
+
+### Internal Changes
+
+- Fix incorrect docstring for `Ratelimiter`. ([\#16255](https://github.com/matrix-org/synapse/issues/16255))
+- Update the release script to work on macOS. ([\#16266](https://github.com/matrix-org/synapse/issues/16266))
+
+
+# Synapse 1.91.2 (2023-09-06)
+
+### Bugfixes
+
+- Revert [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) introspection cache, admin impersonation and account lock. ([\#16258](https://github.com/matrix-org/synapse/issues/16258))
+
+
+# Synapse 1.92.0rc1 (2023-09-05)
+
+### Features
+
+- Add configuration setting for CAS protocol version. Contributed by Aurélien Grimpard. ([\#15816](https://github.com/matrix-org/synapse/issues/15816))
+- Suppress notifications from message edits per [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958). ([\#16113](https://github.com/matrix-org/synapse/issues/16113))
+- Experimental support for [MSC4041](https://github.com/matrix-org/matrix-spec-proposals/pull/4041): return a `Retry-After` header with `M_LIMIT_EXCEEDED` error responses. ([\#16136](https://github.com/matrix-org/synapse/issues/16136))
+- Add `last_seen_ts` to the [admin users API](https://matrix-org.github.io/synapse/latest/admin_api/user_admin_api.html). ([\#16218](https://github.com/matrix-org/synapse/issues/16218))
+- Improve resource usage when sending data to a large number of remote hosts that are marked as "down". ([\#16223](https://github.com/matrix-org/synapse/issues/16223))
+
+### Bugfixes
+
+- Fix IPv6-related bugs on SMTP settings, adding groundwork to fix similar issues. Contributed by @evilham and @telmich (ungleich.ch). ([\#16155](https://github.com/matrix-org/synapse/issues/16155))
+- Fix a spec compliance issue where requests to the `/publicRooms` federation API would specify `include_all_networks` as a string. ([\#16185](https://github.com/matrix-org/synapse/issues/16185))
+- Fix inaccurate error message while attempting to ban or unban a user with the same or higher PL by spliting the conditional statements. Contributed by @leviosacz. ([\#16205](https://github.com/matrix-org/synapse/issues/16205))
+- Fix a rare bug that broke looping calls, which could lead to e.g. linearly increasing memory usage. Introduced in v1.90.0. ([\#16210](https://github.com/matrix-org/synapse/issues/16210))
+- Fix a long-standing bug where uploading images would fail if we could not generate thumbnails for them. ([\#16211](https://github.com/matrix-org/synapse/issues/16211))
+- Fix a long-standing bug where we did not correctly back off from servers that had "gone" if they returned 4xx series error codes. ([\#16221](https://github.com/matrix-org/synapse/issues/16221))
+
+### Improved Documentation
+
+- Update links to the [matrix.org blog](https://matrix.org/blog/). ([\#16008](https://github.com/matrix-org/synapse/issues/16008))
+- Document which [admin APIs](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) are disabled when experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support is enabled. ([\#16168](https://github.com/matrix-org/synapse/issues/16168))
+- Document [`exclude_rooms_from_sync`](https://matrix-org.github.io/synapse/v1.92/usage/configuration/config_documentation.html#exclude_rooms_from_sync) configuration option. ([\#16178](https://github.com/matrix-org/synapse/issues/16178))
+
+### Internal Changes
+
+- Prepare unit tests for Python 3.12. ([\#16099](https://github.com/matrix-org/synapse/issues/16099))
+- Fix nightly CI jobs. ([\#16121](https://github.com/matrix-org/synapse/issues/16121), [\#16213](https://github.com/matrix-org/synapse/issues/16213))
+- Describe which rate limiter was hit in logs. ([\#16135](https://github.com/matrix-org/synapse/issues/16135))
+- Simplify presence code when using workers. ([\#16170](https://github.com/matrix-org/synapse/issues/16170))
+- Track per-device information in the presence code. ([\#16171](https://github.com/matrix-org/synapse/issues/16171), [\#16172](https://github.com/matrix-org/synapse/issues/16172))
+- Stop using the `event_txn_id` table. ([\#16175](https://github.com/matrix-org/synapse/issues/16175))
+- Use `AsyncMock` instead of custom code. ([\#16179](https://github.com/matrix-org/synapse/issues/16179), [\#16180](https://github.com/matrix-org/synapse/issues/16180))
+- Improve error reporting of invalid data passed to `/_matrix/key/v2/query`. ([\#16183](https://github.com/matrix-org/synapse/issues/16183))
+- Task scheduler: add replication notify for new task to launch ASAP. ([\#16184](https://github.com/matrix-org/synapse/issues/16184))
+- Improve type hints. ([\#16186](https://github.com/matrix-org/synapse/issues/16186), [\#16188](https://github.com/matrix-org/synapse/issues/16188), [\#16201](https://github.com/matrix-org/synapse/issues/16201))
+- Bump black version to 23.7.0. ([\#16187](https://github.com/matrix-org/synapse/issues/16187))
+- Log the details of background update failures. ([\#16212](https://github.com/matrix-org/synapse/issues/16212))
+- Cache device resync requests over replication. ([\#16241](https://github.com/matrix-org/synapse/issues/16241))
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.72 to 1.0.75. ([\#16141](https://github.com/matrix-org/synapse/issues/16141))
+* Bump furo from 2023.7.26 to 2023.8.19. ([\#16238](https://github.com/matrix-org/synapse/issues/16238))
+* Bump phonenumbers from 8.13.18 to 8.13.19. ([\#16237](https://github.com/matrix-org/synapse/issues/16237))
+* Bump psycopg2 from 2.9.6 to 2.9.7. ([\#16196](https://github.com/matrix-org/synapse/issues/16196))
+* Bump regex from 1.9.3 to 1.9.4. ([\#16195](https://github.com/matrix-org/synapse/issues/16195))
+* Bump ruff from 0.0.277 to 0.0.286. ([\#16198](https://github.com/matrix-org/synapse/issues/16198))
+* Bump sentry-sdk from 1.29.2 to 1.30.0. ([\#16236](https://github.com/matrix-org/synapse/issues/16236))
+* Bump serde from 1.0.184 to 1.0.188. ([\#16194](https://github.com/matrix-org/synapse/issues/16194))
+* Bump serde_json from 1.0.104 to 1.0.105. ([\#16140](https://github.com/matrix-org/synapse/issues/16140))
+* Bump types-psycopg2 from 2.9.21.10 to 2.9.21.11. ([\#16200](https://github.com/matrix-org/synapse/issues/16200))
+* Bump types-pyyaml from 6.0.12.10 to 6.0.12.11. ([\#16199](https://github.com/matrix-org/synapse/issues/16199))
+
+
+# Synapse 1.91.1 (2023-09-04)
+
+### Bugfixes
+
+- Fix a performance regression introduced in Synapse 1.91.0 where event persistence would cause an excessive linear growth in CPU usage. ([\#16220](https://github.com/matrix-org/synapse/issues/16220))
+
+
+# Synapse 1.91.0 (2023-08-30)
+
+No significant changes since 1.91.0rc1.
+
+
+# Synapse 1.91.0rc1 (2023-08-23)
+
+### Features
+
+- Implements an admin API to lock an user without deactivating them. Based on [MSC3939](https://github.com/matrix-org/matrix-spec-proposals/pull/3939). ([\#15870](https://github.com/matrix-org/synapse/issues/15870))
+- Implements a task scheduler for	resumable potentially long running tasks. ([\#15891](https://github.com/matrix-org/synapse/issues/15891))
+- Allow specifying `client_secret_path` as alternative to `client_secret` for OIDC providers. This avoids leaking the client secret in the homeserver config. Contributed by @Ma27. ([\#16030](https://github.com/matrix-org/synapse/issues/16030))
+- Allow customising the IdP display name, icon, and brand for SAML and CAS providers (in addition to OIDC provider). ([\#16094](https://github.com/matrix-org/synapse/issues/16094))
+- Add an `admins` query parameter to the [List Accounts](https://matrix-org.github.io/synapse/v1.91/admin_api/user_admin_api.html#list-accounts) [admin API](https://matrix-org.github.io/synapse/v1.91/usage/administration/admin_api/index.html), to include only admins or to exclude admins in user queries. ([\#16114](https://github.com/matrix-org/synapse/issues/16114))
+
+### Bugfixes
+
+- Fix long-standing bug where concurrent requests to change a user's push rules could cause a deadlock. Contributed by Nick @ Beeper (@fizzadar). ([\#16052](https://github.com/matrix-org/synapse/issues/16052))
+- Fix a long-standing bu in `/sync` where timeout=0 does not skip caching, resulting in slow calls in cases where there are no new changes. Contributed by @PlasmaIntec. ([\#16080](https://github.com/matrix-org/synapse/issues/16080))
+- Fix performance of state resolutions for large, old rooms that did not have the full auth chain persisted. ([\#16116](https://github.com/matrix-org/synapse/issues/16116))
+- Filter out user agent references to the sliding sync proxy and rust-sdk from the user_daily_visits table to ensure that Element X can be represented fully. ([\#16124](https://github.com/matrix-org/synapse/issues/16124))
+- User constent and 3-PID changes capability cannot be enabled when using experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support. ([\#16127](https://github.com/matrix-org/synapse/issues/16127), [\#16134](https://github.com/matrix-org/synapse/issues/16134))
+- Fix a rare race that could block new events from being sent for up to two minutes. Introduced in v1.90.0. ([\#16133](https://github.com/matrix-org/synapse/issues/16133), [\#16169](https://github.com/matrix-org/synapse/issues/16169))
+- Fix performance degredation when there are a lot of in-flight replication requests. ([\#16148](https://github.com/matrix-org/synapse/issues/16148))
+- Fix a bug introduced in 1.87 where synapse would send an excessive amount of federation requests to servers which have been offline for a long time. Contributed by Nico. ([\#16156](https://github.com/matrix-org/synapse/issues/16156), [\#16164](https://github.com/matrix-org/synapse/issues/16164))
+
+### Improved Documentation
+
+- Structured logging docs: add a link to explain the ELK stack ([\#16091](https://github.com/matrix-org/synapse/issues/16091))
+
+### Internal Changes
+
+- Update dehydrated devices implementation. ([\#16010](https://github.com/matrix-org/synapse/issues/16010))
+- Fix database performance of read/write worker locks. ([\#16061](https://github.com/matrix-org/synapse/issues/16061))
+- Fix building the nix development environment on MacOS systems. ([\#16063](https://github.com/matrix-org/synapse/issues/16063))
+- Override global statement timeout when creating indexes in Postgres. ([\#16085](https://github.com/matrix-org/synapse/issues/16085))
+- Fix the type annotation on `run_db_interaction` in the Module API. ([\#16089](https://github.com/matrix-org/synapse/issues/16089))
+- Clean-up the presence code. ([\#16092](https://github.com/matrix-org/synapse/issues/16092))
+- Run `pyupgrade` for Python 3.8+. ([\#16110](https://github.com/matrix-org/synapse/issues/16110))
+- Rename pagination and purge locks and add comments to explain why they exist and how they work. ([\#16112](https://github.com/matrix-org/synapse/issues/16112))
+- Attempt to fix the twisted trunk job. ([\#16115](https://github.com/matrix-org/synapse/issues/16115))
+- Cache token introspection response from OIDC provider. ([\#16117](https://github.com/matrix-org/synapse/issues/16117))
+- Add cache to `get_server_keys_json_for_remote`. ([\#16123](https://github.com/matrix-org/synapse/issues/16123))
+- Add an admin endpoint to allow authorizing server to signal token revocations. ([\#16125](https://github.com/matrix-org/synapse/issues/16125))
+- Add response time metrics for introspection requests for delegated auth. ([\#16131](https://github.com/matrix-org/synapse/issues/16131))
+- MSC3861: allow impersonation by an admin user using `_oidc_admin_impersonate_user_id` query parameter. ([\#16132](https://github.com/matrix-org/synapse/issues/16132))
+- Increase performance of read/write locks. ([\#16149](https://github.com/matrix-org/synapse/issues/16149))
+- Improve presence tests. ([\#16150](https://github.com/matrix-org/synapse/issues/16150), [\#16151](https://github.com/matrix-org/synapse/issues/16151), [\#16158](https://github.com/matrix-org/synapse/issues/16158))
+- Raised the poetry-core version cap to 1.7.0. ([\#16152](https://github.com/matrix-org/synapse/issues/16152))
+- Fix assertion in user directory unit tests. ([\#16157](https://github.com/matrix-org/synapse/issues/16157))
+- Reduce scope of locks when paginating to alleviate DB contention. ([\#16159](https://github.com/matrix-org/synapse/issues/16159))
+- Reduce DB contention on worker locks. ([\#16160](https://github.com/matrix-org/synapse/issues/16160))
+- Task scheduler: mark task as active if we are scheduling as soon as possible. ([\#16165](https://github.com/matrix-org/synapse/issues/16165))
+
+### Updates to locked dependencies
+
+* Bump click from 8.1.6 to 8.1.7. ([\#16145](https://github.com/matrix-org/synapse/issues/16145))
+* Bump gitpython from 3.1.31 to 3.1.32. ([\#16103](https://github.com/matrix-org/synapse/issues/16103))
+* Bump ijson from 3.2.1 to 3.2.3. ([\#16143](https://github.com/matrix-org/synapse/issues/16143))
+* Bump isort from 5.11.5 to 5.12.0. ([\#16108](https://github.com/matrix-org/synapse/issues/16108))
+* Bump log from 0.4.19 to 0.4.20. ([\#16109](https://github.com/matrix-org/synapse/issues/16109))
+* Bump pygithub from 1.59.0 to 1.59.1. ([\#16144](https://github.com/matrix-org/synapse/issues/16144))
+* Bump sentry-sdk from 1.28.1 to 1.29.2. ([\#16142](https://github.com/matrix-org/synapse/issues/16142))
+* Bump serde from 1.0.183 to 1.0.184. ([\#16139](https://github.com/matrix-org/synapse/issues/16139))
+* Bump txredisapi from 1.4.9 to 1.4.10. ([\#16107](https://github.com/matrix-org/synapse/issues/16107))
+* Bump types-bleach from 6.0.0.3 to 6.0.0.4. ([\#16106](https://github.com/matrix-org/synapse/issues/16106))
+* Bump types-pillow from 10.0.0.1 to 10.0.0.2. ([\#16105](https://github.com/matrix-org/synapse/issues/16105))
+* Bump types-pyopenssl from 23.2.0.1 to 23.2.0.2. ([\#16146](https://github.com/matrix-org/synapse/issues/16146))
+
+# Synapse 1.91.0rc1 (2023-08-23)
+
+### Features
+
+- Implements an admin API to lock an user without deactivating them. Based on [MSC3939](https://github.com/matrix-org/matrix-spec-proposals/pull/3939). ([\#15870](https://github.com/matrix-org/synapse/issues/15870))
+- Allow specifying `client_secret_path` as alternative to `client_secret` for OIDC providers. This avoids leaking the client secret in the homeserver config. Contributed by @Ma27. ([\#16030](https://github.com/matrix-org/synapse/issues/16030))
+- Allow customising the IdP display name, icon, and brand for SAML and CAS providers (in addition to OIDC provider). ([\#16094](https://github.com/matrix-org/synapse/issues/16094))
+- Add an `admins` query parameter to the [List Accounts](https://matrix-org.github.io/synapse/v1.91/admin_api/user_admin_api.html#list-accounts) [admin API](https://matrix-org.github.io/synapse/v1.91/usage/administration/admin_api/index.html), to include only admins or to exclude admins in user queries. ([\#16114](https://github.com/matrix-org/synapse/issues/16114))
+
+### Bugfixes
+
+- Fix long-standing bug where concurrent requests to change a user's push rules could cause a deadlock. Contributed by Nick @ Beeper (@fizzadar). ([\#16052](https://github.com/matrix-org/synapse/issues/16052))
+- Fix a long-standing bug in `/sync` where timeout=0 does not skip caching, resulting in slow calls in cases where there are no new changes. Contributed by @PlasmaIntec. ([\#16080](https://github.com/matrix-org/synapse/issues/16080))
+- Fix performance of state resolutions for large, old rooms that did not have the full auth chain persisted. ([\#16116](https://github.com/matrix-org/synapse/issues/16116))
+- Filter out user agent references to the sliding sync proxy and rust-sdk from the `user_daily_visits` table to ensure that Element X can be represented fully. ([\#16124](https://github.com/matrix-org/synapse/issues/16124))
+- User constent and third-party ID changes capability cannot be enabled when using experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support. ([\#16127](https://github.com/matrix-org/synapse/issues/16127), [\#16134](https://github.com/matrix-org/synapse/issues/16134))
+- Fix a rare race that could block new events from being sent for up to two minutes. Introduced in v1.90.0. ([\#16133](https://github.com/matrix-org/synapse/issues/16133), [\#16169](https://github.com/matrix-org/synapse/issues/16169))
+- Fix performance degredation when there are a lot of in-flight replication requests. ([\#16148](https://github.com/matrix-org/synapse/issues/16148))
+- Fix a bug introduced in 1.87 where synapse would send an excessive amount of federation requests to servers which have been offline for a long time. Contributed by Nico. ([\#16156](https://github.com/matrix-org/synapse/issues/16156), [\#16164](https://github.com/matrix-org/synapse/issues/16164))
+
+### Improved Documentation
+
+- Structured logging docs: add a link to explain the ELK stack ([\#16091](https://github.com/matrix-org/synapse/issues/16091))
+
+### Internal Changes
+
+- Update dehydrated devices implementation. ([\#16010](https://github.com/matrix-org/synapse/issues/16010))
+- Fix database performance of read/write worker locks. ([\#16061](https://github.com/matrix-org/synapse/issues/16061))
+- Fix building the nix development environment on MacOS systems. ([\#16063](https://github.com/matrix-org/synapse/issues/16063))
+- Override global statement timeout when creating indexes in Postgres. ([\#16085](https://github.com/matrix-org/synapse/issues/16085))
+- Fix the type annotation on `run_db_interaction` in the Module API. ([\#16089](https://github.com/matrix-org/synapse/issues/16089))
+- Clean-up the presence code. ([\#16092](https://github.com/matrix-org/synapse/issues/16092))
+- Run `pyupgrade` for Python 3.8+. ([\#16110](https://github.com/matrix-org/synapse/issues/16110))
+- Rename pagination and purge locks and add comments to explain why they exist and how they work. ([\#16112](https://github.com/matrix-org/synapse/issues/16112))
+- Attempt to fix the twisted trunk job. ([\#16115](https://github.com/matrix-org/synapse/issues/16115))
+- Cache token introspection response from OIDC provider. ([\#16117](https://github.com/matrix-org/synapse/issues/16117))
+- Add cache to `get_server_keys_json_for_remote`. ([\#16123](https://github.com/matrix-org/synapse/issues/16123))
+- Add an admin endpoint to allow authorizing server to signal token revocations. ([\#16125](https://github.com/matrix-org/synapse/issues/16125))
+- Add response time metrics for introspection requests for delegated auth. ([\#16131](https://github.com/matrix-org/synapse/issues/16131))
+- [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861): allow impersonation by an admin user using `_oidc_admin_impersonate_user_id` query parameter. ([\#16132](https://github.com/matrix-org/synapse/issues/16132))
+- Increase performance of read/write locks. ([\#16149](https://github.com/matrix-org/synapse/issues/16149))
+- Improve presence tests. ([\#16150](https://github.com/matrix-org/synapse/issues/16150), [\#16151](https://github.com/matrix-org/synapse/issues/16151), [\#16158](https://github.com/matrix-org/synapse/issues/16158))
+- Raised the poetry-core version cap to 1.7.0. ([\#16152](https://github.com/matrix-org/synapse/issues/16152))
+- Fix assertion in user directory unit tests. ([\#16157](https://github.com/matrix-org/synapse/issues/16157))
+- Reduce scope of locks when paginating to alleviate DB contention. ([\#16159](https://github.com/matrix-org/synapse/issues/16159))
+- Reduce DB contention on worker locks. ([\#16160](https://github.com/matrix-org/synapse/issues/16160))
+- Task scheduler: mark task as active if we are scheduling as soon as possible. ([\#16165](https://github.com/matrix-org/synapse/issues/16165))
+- Implements a task scheduler for	resumable potentially long running tasks. ([\#15891](https://github.com/matrix-org/synapse/issues/15891))
+
+### Updates to locked dependencies
+
+* Bump click from 8.1.6 to 8.1.7. ([\#16145](https://github.com/matrix-org/synapse/issues/16145))
+* Bump gitpython from 3.1.31 to 3.1.32. ([\#16103](https://github.com/matrix-org/synapse/issues/16103))
+* Bump ijson from 3.2.1 to 3.2.3. ([\#16143](https://github.com/matrix-org/synapse/issues/16143))
+* Bump isort from 5.11.5 to 5.12.0. ([\#16108](https://github.com/matrix-org/synapse/issues/16108))
+* Bump log from 0.4.19 to 0.4.20. ([\#16109](https://github.com/matrix-org/synapse/issues/16109))
+* Bump pygithub from 1.59.0 to 1.59.1. ([\#16144](https://github.com/matrix-org/synapse/issues/16144))
+* Bump sentry-sdk from 1.28.1 to 1.29.2. ([\#16142](https://github.com/matrix-org/synapse/issues/16142))
+* Bump serde from 1.0.183 to 1.0.184. ([\#16139](https://github.com/matrix-org/synapse/issues/16139))
+* Bump txredisapi from 1.4.9 to 1.4.10. ([\#16107](https://github.com/matrix-org/synapse/issues/16107))
+* Bump types-bleach from 6.0.0.3 to 6.0.0.4. ([\#16106](https://github.com/matrix-org/synapse/issues/16106))
+* Bump types-pillow from 10.0.0.1 to 10.0.0.2. ([\#16105](https://github.com/matrix-org/synapse/issues/16105))
+* Bump types-pyopenssl from 23.2.0.1 to 23.2.0.2. ([\#16146](https://github.com/matrix-org/synapse/issues/16146))
+
+# Synapse 1.90.0 (2023-08-15)
+
+No significant changes since 1.90.0rc1.
+
+
+# Synapse 1.90.0rc1 (2023-08-08)
+
+### Features
+
+- Scope transaction IDs to devices (implement [MSC3970](https://github.com/matrix-org/matrix-spec-proposals/pull/3970)). ([\#15629](https://github.com/matrix-org/synapse/issues/15629))
+- Remove old rows from the `cache_invalidation_stream_by_instance` table automatically (this table is unused in SQLite). ([\#15868](https://github.com/matrix-org/synapse/issues/15868))
+
+### Bugfixes
+
+- Fix a long-standing bug where purging history and paginating simultaneously could lead to database corruption when using workers. ([\#15791](https://github.com/matrix-org/synapse/issues/15791))
+- Fix a long-standing bug where profile endpoint returned a 404 when the user's display name was empty. ([\#16012](https://github.com/matrix-org/synapse/issues/16012))
+- Fix a long-standing bug where the `synapse_port_db` failed to configure sequences for application services and partial stated rooms. ([\#16043](https://github.com/matrix-org/synapse/issues/16043))
+- Fix long-standing bug with deletion in dehydrated devices v2. ([\#16046](https://github.com/matrix-org/synapse/issues/16046))
+
+### Updates to the Docker image
+
+- Add `org.opencontainers.image.version` labels to Docker containers [published by Matrix.org](https://hub.docker.com/r/matrixdotorg/synapse). Contributed by Mo Balaa. ([\#15972](https://github.com/matrix-org/synapse/issues/15972), [\#16009](https://github.com/matrix-org/synapse/issues/16009))
+
+### Improved Documentation
+
+- Add a internal documentation page describing the ["streams" used within Synapse](https://matrix-org.github.io/synapse/v1.90/development/synapse_architecture/streams.html). ([\#16015](https://github.com/matrix-org/synapse/issues/16015))
+- Clarify comment on the keys/upload over replication enpoint. ([\#16016](https://github.com/matrix-org/synapse/issues/16016))
+- Do not expose Admin API in caddy reverse proxy example. Contributed by @NilsIrl. ([\#16027](https://github.com/matrix-org/synapse/issues/16027))
+
+### Deprecations and Removals
+
+- Remove support for legacy application service paths. ([\#15964](https://github.com/matrix-org/synapse/issues/15964))
+- Move support for application service query parameter authorization behind a configuration option. ([\#16017](https://github.com/matrix-org/synapse/issues/16017))
+
+### Internal Changes
+
+- Update SQL queries to inline boolean parameters as supported in SQLite 3.27. ([\#15525](https://github.com/matrix-org/synapse/issues/15525))
+- Allow for the configuration of the backoff algorithm for federation destinations. ([\#15754](https://github.com/matrix-org/synapse/issues/15754))
+- Allow modules to check whether the current worker is configured to run background tasks. ([\#15991](https://github.com/matrix-org/synapse/issues/15991))
+- Update support for [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958) to match the latest revision of the MSC. ([\#15992](https://github.com/matrix-org/synapse/issues/15992))
+- Allow modules to schedule delayed background calls. ([\#15993](https://github.com/matrix-org/synapse/issues/15993))
+- Properly overwrite the `redacts` content-property for forwards-compatibility with room versions 1 through 10. ([\#16013](https://github.com/matrix-org/synapse/issues/16013))
+- Fix building the nix development environment on MacOS systems. ([\#16019](https://github.com/matrix-org/synapse/issues/16019))
+- Remove leading and trailing spaces when setting a display name. ([\#16031](https://github.com/matrix-org/synapse/issues/16031))
+- Combine duplicated code. ([\#16023](https://github.com/matrix-org/synapse/issues/16023))
+- Collect additional metrics from `ResponseCache` for eviction. ([\#16028](https://github.com/matrix-org/synapse/issues/16028))
+- Fix endpoint improperly declaring support for MSC3814. ([\#16068](https://github.com/matrix-org/synapse/issues/16068))
+- Drop backwards compat hack for event serialization. ([\#16069](https://github.com/matrix-org/synapse/issues/16069))
+
+### Updates to locked dependencies
+
+* Update PyYAML to 6.0.1. ([\#16011](https://github.com/matrix-org/synapse/issues/16011))
+* Bump cryptography from 41.0.2 to 41.0.3. ([\#16048](https://github.com/matrix-org/synapse/issues/16048))
+* Bump furo from 2023.5.20 to 2023.7.26. ([\#16077](https://github.com/matrix-org/synapse/issues/16077))
+* Bump immutabledict from 2.2.4 to 3.0.0. ([\#16034](https://github.com/matrix-org/synapse/issues/16034))
+* Update certifi to 2023.7.22 and pygments to 2.15.1. ([\#16044](https://github.com/matrix-org/synapse/issues/16044))
+* Bump jsonschema from 4.18.3 to 4.19.0. ([\#16081](https://github.com/matrix-org/synapse/issues/16081))
+* Bump phonenumbers from 8.13.14 to 8.13.18. ([\#16076](https://github.com/matrix-org/synapse/issues/16076))
+* Bump regex from 1.9.1 to 1.9.3. ([\#16073](https://github.com/matrix-org/synapse/issues/16073))
+* Bump serde from 1.0.171 to 1.0.175. ([\#15982](https://github.com/matrix-org/synapse/issues/15982))
+* Bump serde from 1.0.175 to 1.0.179. ([\#16033](https://github.com/matrix-org/synapse/issues/16033))
+* Bump serde from 1.0.179 to 1.0.183. ([\#16074](https://github.com/matrix-org/synapse/issues/16074))
+* Bump serde_json from 1.0.103 to 1.0.104. ([\#16032](https://github.com/matrix-org/synapse/issues/16032))
+* Bump service-identity from 21.1.0 to 23.1.0. ([\#16038](https://github.com/matrix-org/synapse/issues/16038))
+* Bump types-commonmark from 0.9.2.3 to 0.9.2.4. ([\#16037](https://github.com/matrix-org/synapse/issues/16037))
+* Bump types-jsonschema from 4.17.0.8 to 4.17.0.10. ([\#16036](https://github.com/matrix-org/synapse/issues/16036))
+* Bump types-netaddr from 0.8.0.8 to 0.8.0.9. ([\#16035](https://github.com/matrix-org/synapse/issues/16035))
+* Bump types-opentracing from 2.4.10.5 to 2.4.10.6. ([\#16078](https://github.com/matrix-org/synapse/issues/16078))
+* Bump types-setuptools from 68.0.0.0 to 68.0.0.3. ([\#16079](https://github.com/matrix-org/synapse/issues/16079))
+
+# Synapse 1.89.0 (2023-08-01)
+
+No significant changes since 1.89.0rc1.
+
+
+# Synapse 1.89.0rc1 (2023-07-25)
+
+### Features
+
+- Add Unix Socket support for HTTP Replication Listeners. [Document and provide usage instructions](https://matrix-org.github.io/synapse/v1.89/usage/configuration/config_documentation.html#listeners) for utilizing Unix sockets in Synapse. Contributed by Jason Little. ([\#15708](https://github.com/matrix-org/synapse/issues/15708), [\#15924](https://github.com/matrix-org/synapse/issues/15924))
+- Allow `+` in Matrix IDs, per [MSC4009](https://github.com/matrix-org/matrix-spec-proposals/pull/4009). ([\#15911](https://github.com/matrix-org/synapse/issues/15911))
+- Support room version 11 from [MSC3820](https://github.com/matrix-org/matrix-spec-proposals/pull/3820). ([\#15912](https://github.com/matrix-org/synapse/issues/15912))
+- Allow configuring the set of workers to proxy outbound federation traffic through via `outbound_federation_restricted_to`. ([\#15913](https://github.com/matrix-org/synapse/issues/15913), [\#15969](https://github.com/matrix-org/synapse/issues/15969))
+- Implement [MSC3814](https://github.com/matrix-org/matrix-spec-proposals/pull/3814), dehydrated devices v2/shrivelled sessions and move [MSC2697](https://github.com/matrix-org/matrix-spec-proposals/pull/2697) behind a config flag. Contributed by Nico from Famedly, H-Shay and poljar. ([\#15929](https://github.com/matrix-org/synapse/issues/15929))
+
+### Bugfixes
+
+- Fix a long-standing bug where remote invites weren't correctly pushed. ([\#15820](https://github.com/matrix-org/synapse/issues/15820))
+- Fix background schema updates failing over a large upgrade gap. ([\#15887](https://github.com/matrix-org/synapse/issues/15887))
+- Fix a bug introduced in 1.86.0 where Synapse starting with an empty `experimental_features` configuration setting. ([\#15925](https://github.com/matrix-org/synapse/issues/15925))
+- Fixed deploy annotations in the provided Grafana dashboard config, so that it shows for any homeserver and not just matrix.org. Contributed by @wrjlewis. ([\#15957](https://github.com/matrix-org/synapse/issues/15957))
+- Ensure a long state res does not starve CPU by occasionally yielding to the reactor. ([\#15960](https://github.com/matrix-org/synapse/issues/15960))
+- Properly handle redactions of creation events. ([\#15973](https://github.com/matrix-org/synapse/issues/15973))
+- Fix a bug where resyncing stale device lists could block responding to federation transactions, and thus delay receiving new data from the remote server. ([\#15975](https://github.com/matrix-org/synapse/issues/15975))
+
+### Improved Documentation
+
+- Better clarify how to run a worker instance (pass both configs). ([\#15921](https://github.com/matrix-org/synapse/issues/15921))
+- Improve [the documentation](https://matrix-org.github.io/synapse/v1.89/admin_api/user_admin_api.html#login-as-a-user) for the login as a user admin API. ([\#15938](https://github.com/matrix-org/synapse/issues/15938))
+- Fix broken Arch Linux package link. Contributed by @SnipeXandrej. ([\#15981](https://github.com/matrix-org/synapse/issues/15981))
+
+### Deprecations and Removals
+
+- Remove support for calling the `/register` endpoint with an unspecced `user` property for application services. ([\#15928](https://github.com/matrix-org/synapse/issues/15928))
+
+### Internal Changes
+
+- Mark `get_user_in_directory` private since it is only used in tests. Also remove the cache from it. ([\#15884](https://github.com/matrix-org/synapse/issues/15884))
+- Document which Python version runs on a given Linux distribution so we can more easily clean up later. ([\#15909](https://github.com/matrix-org/synapse/issues/15909))
+- Add details to warning in log when we fail to fetch an alias. ([\#15922](https://github.com/matrix-org/synapse/issues/15922))
+- Remove unneeded `__init__`. ([\#15926](https://github.com/matrix-org/synapse/issues/15926))
+- Fix bug with read/write lock implementation. This is currently unused so has no observable effects. ([\#15933](https://github.com/matrix-org/synapse/issues/15933), [\#15958](https://github.com/matrix-org/synapse/issues/15958))
+- Unbreak the nix development environment by pinning the Rust version to 1.70.0. ([\#15940](https://github.com/matrix-org/synapse/issues/15940))
+- Update presence metrics to differentiate remote vs local users. ([\#15952](https://github.com/matrix-org/synapse/issues/15952))
+- Stop reading from column `user_id` of table `profiles`. ([\#15955](https://github.com/matrix-org/synapse/issues/15955))
+- Build packages for Debian Trixie. ([\#15961](https://github.com/matrix-org/synapse/issues/15961))
+- Reduce the amount of state we pull out. ([\#15968](https://github.com/matrix-org/synapse/issues/15968))
+- Speed up updating state in large rooms. ([\#15971](https://github.com/matrix-org/synapse/issues/15971))
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.71 to 1.0.72. ([\#15949](https://github.com/matrix-org/synapse/issues/15949))
+* Bump click from 8.1.3 to 8.1.6. ([\#15984](https://github.com/matrix-org/synapse/issues/15984))
+* Bump cryptography from 41.0.1 to 41.0.2. ([\#15943](https://github.com/matrix-org/synapse/issues/15943))
+* Bump jsonschema from 4.17.3 to 4.18.3. ([\#15948](https://github.com/matrix-org/synapse/issues/15948))
+* Bump pillow from 9.4.0 to 10.0.0. ([\#15986](https://github.com/matrix-org/synapse/issues/15986))
+* Bump prometheus-client from 0.17.0 to 0.17.1. ([\#15945](https://github.com/matrix-org/synapse/issues/15945))
+* Bump pydantic from 1.10.10 to 1.10.11. ([\#15946](https://github.com/matrix-org/synapse/issues/15946))
+* Bump pygithub from 1.58.2 to 1.59.0. ([\#15834](https://github.com/matrix-org/synapse/issues/15834))
+* Bump pyo3-log from 0.8.2 to 0.8.3. ([\#15951](https://github.com/matrix-org/synapse/issues/15951))
+* Bump sentry-sdk from 1.26.0 to 1.28.1. ([\#15985](https://github.com/matrix-org/synapse/issues/15985))
+* Bump serde_json from 1.0.100 to 1.0.103. ([\#15950](https://github.com/matrix-org/synapse/issues/15950))
+* Bump types-pillow from 9.5.0.4 to 10.0.0.1. ([\#15932](https://github.com/matrix-org/synapse/issues/15932))
+* Bump types-requests from 2.31.0.1 to 2.31.0.2. ([\#15983](https://github.com/matrix-org/synapse/issues/15983))
+* Bump typing-extensions from 4.5.0 to 4.7.1. ([\#15947](https://github.com/matrix-org/synapse/issues/15947))
+
+# Synapse 1.88.0 (2023-07-18)
+
+This release
+ - raises the minimum supported version of Python to 3.8, as Python 3.7 is now [end-of-life](https://devguide.python.org/versions/), and
+ - removes deprecated config options related to worker deployment.
+
+See [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.88/docs/upgrade.md#upgrading-to-v1880) for more information.
+
+
+### Bugfixes
+
+- Revert "Stop writing to column `user_id` of tables `profiles` and `user_filters`", which was introduced in Synapse 1.88.0rc1. ([\#15953](https://github.com/matrix-org/synapse/issues/15953))
+
+
+# Synapse 1.88.0rc1 (2023-07-11)
+
+### Features
+
+- Add `not_user_type` param to the [list accounts admin API](https://matrix-org.github.io/synapse/v1.88/admin_api/user_admin_api.html#list-accounts). ([\#15844](https://github.com/matrix-org/synapse/issues/15844))
+
+### Bugfixes
+
+- Pin `pydantic` to `^=1.7.4` to avoid backwards-incompatible API changes from the 2.0.0 release.
+  Contributed by @PaarthShah. ([\#15862](https://github.com/matrix-org/synapse/issues/15862))
+- Correctly resize thumbnails with pillow version >=10. ([\#15876](https://github.com/matrix-org/synapse/issues/15876))
+
+### Improved Documentation
+
+- Fixed header levels on the [Admin API "Users"](https://matrix-org.github.io/synapse/v1.87/admin_api/user_admin_api.html) documentation page. Contributed by @sumnerevans at @beeper. ([\#15852](https://github.com/matrix-org/synapse/issues/15852))
+- Remove deprecated `worker_replication_host`, `worker_replication_http_port` and `worker_replication_http_tls` configuration options. ([\#15872](https://github.com/matrix-org/synapse/issues/15872))
+
+### Deprecations and Removals
+
+- **Remove deprecated `worker_replication_host`, `worker_replication_http_port` and `worker_replication_http_tls` configuration options.** See the [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.88/docs/upgrade.md#removal-of-worker_replication_-settings) for more details. ([\#15860](https://github.com/matrix-org/synapse/issues/15860))
+- Remove support for Python 3.7 and hence for Debian Buster. ([\#15851](https://github.com/matrix-org/synapse/issues/15851), [\#15892](https://github.com/matrix-org/synapse/issues/15892), [\#15893](https://github.com/matrix-org/synapse/issues/15893), [\#15917](https://github.com/matrix-org/synapse/pull/15917))
+
+### Internal Changes
+
+- Add foreign key constraint to `event_forward_extremities`. ([\#15751](https://github.com/matrix-org/synapse/issues/15751), [\#15907](https://github.com/matrix-org/synapse/issues/15907))
+- Add read/write style cross-worker locks. ([\#15782](https://github.com/matrix-org/synapse/issues/15782))
+- Stop writing to column `user_id` of tables `profiles` and `user_filters`. ([\#15787](https://github.com/matrix-org/synapse/issues/15787))
+- Use lower isolation level when cleaning old presence stream data to avoid serialization errors. ([\#15826](https://github.com/matrix-org/synapse/issues/15826))
+- Add tracing to media `/upload` code paths. ([\#15850](https://github.com/matrix-org/synapse/issues/15850), [\#15888](https://github.com/matrix-org/synapse/issues/15888))
+- Add a timeout that aborts any Postgres statement taking more than 1 hour. ([\#15853](https://github.com/matrix-org/synapse/issues/15853))
+- Fix the `devenv up` configuration which was ignoring the config overrides. ([\#15854](https://github.com/matrix-org/synapse/issues/15854))
+- Optimised cleanup of old entries in `device_lists_stream`. ([\#15861](https://github.com/matrix-org/synapse/issues/15861))
+- Update the Matrix clients link in the _It works! Synapse is running_ landing page. ([\#15874](https://github.com/matrix-org/synapse/issues/15874))
+- Fix building Synapse with the nightly Rust compiler. ([\#15906](https://github.com/matrix-org/synapse/issues/15906))
+- Add `Server` to Access-Control-Expose-Headers header. ([\#15908](https://github.com/matrix-org/synapse/issues/15908))
+
+### Updates to locked dependencies
+
+* Bump authlib from 1.2.0 to 1.2.1. ([\#15864](https://github.com/matrix-org/synapse/issues/15864))
+* Bump importlib-metadata from 6.6.0 to 6.7.0. ([\#15865](https://github.com/matrix-org/synapse/issues/15865))
+* Bump lxml from 4.9.2 to 4.9.3. ([\#15897](https://github.com/matrix-org/synapse/issues/15897))
+* Bump regex from 1.8.4 to 1.9.1. ([\#15902](https://github.com/matrix-org/synapse/issues/15902))
+* Bump ruff from 0.0.275 to 0.0.277. ([\#15900](https://github.com/matrix-org/synapse/issues/15900))
+* Bump sentry-sdk from 1.25.1 to 1.26.0. ([\#15867](https://github.com/matrix-org/synapse/issues/15867))
+* Bump serde_json from 1.0.99 to 1.0.100. ([\#15901](https://github.com/matrix-org/synapse/issues/15901))
+* Bump types-pyopenssl from 23.2.0.0 to 23.2.0.1. ([\#15866](https://github.com/matrix-org/synapse/issues/15866))
+
+# Synapse 1.87.0 (2023-07-04)
+
+Please note that this will be the last release of Synapse that is compatible with
+Python 3.7 and earlier.
+This is due to Python 3.7 now having reached End of Life; see our [deprecation policy](https://matrix-org.github.io/synapse/v1.87/deprecation_policy.html)
+for more details.
+
+### Bugfixes
+
+- Pin `pydantic` to `^1.7.4` to avoid backwards-incompatible API changes from the 2.0.0 release.
+  Resolves https://github.com/matrix-org/synapse/issues/15858.
+  Contributed by @PaarthShah. ([\#15862](https://github.com/matrix-org/synapse/issues/15862))
+
+### Internal Changes
+
+- Split out 2022 changes from the changelog so the rendered version in GitHub doesn't timeout as much. ([\#15846](https://github.com/matrix-org/synapse/issues/15846))
+
+
+# Synapse 1.87.0rc1 (2023-06-27)
+
+### Features
+
+- Improve `/messages` response time by avoiding backfill when we already have messages to return. ([\#15737](https://github.com/matrix-org/synapse/issues/15737))
+- Add spam checker module API for logins. ([\#15838](https://github.com/matrix-org/synapse/issues/15838))
+
+### Bugfixes
+
+- Fix a long-standing bug where media files were served in an unsafe manner. Contributed by @joshqou. ([\#15680](https://github.com/matrix-org/synapse/issues/15680))
+- Avoid invalidating a cache that was just prefilled. ([\#15758](https://github.com/matrix-org/synapse/issues/15758))
+- Fix requesting multiple keys at once over federation, related to [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983). ([\#15770](https://github.com/matrix-org/synapse/issues/15770))
+- Fix joining rooms through aliases where the alias server isn't a real homeserver. Contributed by @tulir @ Beeper. ([\#15776](https://github.com/matrix-org/synapse/issues/15776))
+- Fix a bug in push rules handling leading to an invalid (per spec) `is_user_mention` rule sent to clients. Also fix wrong rule names for `is_user_mention` and `is_room_mention`. ([\#15781](https://github.com/matrix-org/synapse/issues/15781))
+- Fix a bug introduced in 1.57.0 where the wrong table would be locked on updating database rows when using SQLite as the database backend. ([\#15788](https://github.com/matrix-org/synapse/issues/15788))
+- Fix Sytest environmental variable evaluation in CI. ([\#15804](https://github.com/matrix-org/synapse/issues/15804))
+- Fix forgotten rooms missing from initial sync after rejoining them. Contributed by Nico from Famedly. ([\#15815](https://github.com/matrix-org/synapse/issues/15815))
+- Fix sqlite `user_filters` upgrade introduced in v1.86.0. ([\#15817](https://github.com/matrix-org/synapse/issues/15817))
+
+### Improved Documentation
+
+- Document `looping_call()` functionality that will wait for the given function to finish before scheduling another. ([\#15772](https://github.com/matrix-org/synapse/issues/15772))
+- Fix a typo in the [Admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html). ([\#15805](https://github.com/matrix-org/synapse/issues/15805))
+- Fix typo in MSC number in faster remote room join architecture doc. ([\#15812](https://github.com/matrix-org/synapse/issues/15812))
+
+### Deprecations and Removals
+
+- Remove experimental [MSC2716](https://github.com/matrix-org/matrix-spec-proposals/pull/2716) implementation to incrementally import history into existing rooms. ([\#15748](https://github.com/matrix-org/synapse/issues/15748))
+
+### Internal Changes
+
+- Replace `EventContext` fields `prev_group` and `delta_ids` with field `state_group_deltas`. ([\#15233](https://github.com/matrix-org/synapse/issues/15233))
+- Regularly try to send transactions to other servers after they failed instead of waiting for a new event to be available before trying. ([\#15743](https://github.com/matrix-org/synapse/issues/15743))
+- Fix requesting multiple keys at once over federation, related to [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983). ([\#15755](https://github.com/matrix-org/synapse/issues/15755))
+- Allow for the configuration of max request retries and min/max retry delays in the matrix federation client. ([\#15783](https://github.com/matrix-org/synapse/issues/15783))
+- Switch from `matrix://` to `matrix-federation://` scheme for internal Synapse routing of outbound federation traffic. ([\#15806](https://github.com/matrix-org/synapse/issues/15806))
+- Fix harmless exceptions being printed when running the port DB script. ([\#15814](https://github.com/matrix-org/synapse/issues/15814))
+
+### Updates to locked dependencies
+
+* Bump attrs from 22.2.0 to 23.1.0. ([\#15801](https://github.com/matrix-org/synapse/issues/15801))
+* Bump cryptography from 40.0.2 to 41.0.1. ([\#15800](https://github.com/matrix-org/synapse/issues/15800))
+* Bump ijson from 3.2.0.post0 to 3.2.1. ([\#15802](https://github.com/matrix-org/synapse/issues/15802))
+* Bump phonenumbers from 8.13.13 to 8.13.14. ([\#15798](https://github.com/matrix-org/synapse/issues/15798))
+* Bump ruff from 0.0.265 to 0.0.272. ([\#15799](https://github.com/matrix-org/synapse/issues/15799))
+* Bump ruff from 0.0.272 to 0.0.275. ([\#15833](https://github.com/matrix-org/synapse/issues/15833))
+* Bump serde_json from 1.0.96 to 1.0.97. ([\#15797](https://github.com/matrix-org/synapse/issues/15797))
+* Bump serde_json from 1.0.97 to 1.0.99. ([\#15832](https://github.com/matrix-org/synapse/issues/15832))
+* Bump towncrier from 22.12.0 to 23.6.0. ([\#15831](https://github.com/matrix-org/synapse/issues/15831))
+* Bump types-opentracing from 2.4.10.4 to 2.4.10.5. ([\#15830](https://github.com/matrix-org/synapse/issues/15830))
+* Bump types-setuptools from 67.8.0.0 to 68.0.0.0. ([\#15835](https://github.com/matrix-org/synapse/issues/15835))
+
+Synapse 1.86.0 (2023-06-20)
+===========================
+
+No significant changes since 1.86.0rc2.
+
+
+Synapse 1.86.0rc2 (2023-06-14)
+==============================
+
+Bugfixes
+--------
+
+- Fix an error when having workers of different versions running. ([\#15774](https://github.com/matrix-org/synapse/issues/15774))
+
+
+Synapse 1.86.0rc1 (2023-06-13)
+==============================
+
+This version was tagged but never released.
+
+Features
+--------
+
+- Stable support for [MSC3882](https://github.com/matrix-org/matrix-spec-proposals/pull/3882) to allow an existing device/session to generate a login token for use on a new device/session. ([\#15388](https://github.com/matrix-org/synapse/issues/15388))
+- Support resolving a room's [canonical alias](https://spec.matrix.org/v1.7/client-server-api/#mroomcanonical_alias) via the module API. ([\#15450](https://github.com/matrix-org/synapse/issues/15450))
+- Enable support for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952): intentional mentions. ([\#15520](https://github.com/matrix-org/synapse/issues/15520))
+- Experimental [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) support: delegate auth to an OIDC provider. ([\#15582](https://github.com/matrix-org/synapse/issues/15582))
+- Add Synapse version deploy annotations to Grafana dashboard which enables easy correlation between behavior changes witnessed in a graph to a certain Synapse version and nail down regressions. ([\#15674](https://github.com/matrix-org/synapse/issues/15674))
+- Add a catch-all * to the supported relation types when redacting an event and its related events. This is an update to [MSC3912](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) implementation. ([\#15705](https://github.com/matrix-org/synapse/issues/15705))
+- Speed up `/messages` by backfilling in the background when there are no backward extremities where we are directly paginating. ([\#15710](https://github.com/matrix-org/synapse/issues/15710))
+- Expose a metric reporting the database background update status. ([\#15740](https://github.com/matrix-org/synapse/issues/15740))
+
+
+Bugfixes
+--------
+
+- Correctly clear caches when we delete a room. ([\#15609](https://github.com/matrix-org/synapse/issues/15609))
+- Check permissions for enabling encryption earlier during room creation to avoid creating broken rooms. ([\#15695](https://github.com/matrix-org/synapse/issues/15695))
+
+
+Improved Documentation
+----------------------
+
+- Simplify query to find participating servers in a room. ([\#15732](https://github.com/matrix-org/synapse/issues/15732))
+
+
+Internal Changes
+----------------
+
+- Log when events are (maybe unexpectedly) filtered out of responses in tests. ([\#14213](https://github.com/matrix-org/synapse/issues/14213))
+- Read from column `full_user_id` rather than `user_id` of tables `profiles` and `user_filters`. ([\#15649](https://github.com/matrix-org/synapse/issues/15649))
+- Add support for tracing functions which return `Awaitable`s. ([\#15650](https://github.com/matrix-org/synapse/issues/15650))
+- Cache requests for user's devices over federation. ([\#15675](https://github.com/matrix-org/synapse/issues/15675))
+- Add fully qualified docker image names to Dockerfiles. ([\#15689](https://github.com/matrix-org/synapse/issues/15689))
+- Remove some unused code. ([\#15690](https://github.com/matrix-org/synapse/issues/15690))
+- Improve type hints. ([\#15694](https://github.com/matrix-org/synapse/issues/15694), [\#15697](https://github.com/matrix-org/synapse/issues/15697))
+- Update docstring and traces on `maybe_backfill()` functions. ([\#15709](https://github.com/matrix-org/synapse/issues/15709))
+- Add context for when/why to use the `long_retries` option when sending Federation requests. ([\#15721](https://github.com/matrix-org/synapse/issues/15721))
+- Removed some unused fields. ([\#15723](https://github.com/matrix-org/synapse/issues/15723))
+- Update federation error to more plainly explain we can only authorize our own membership events. ([\#15725](https://github.com/matrix-org/synapse/issues/15725))
+- Prevent the `latest_deps` and `twisted_trunk` daily GitHub Actions workflows from running on forks of the codebase. ([\#15726](https://github.com/matrix-org/synapse/issues/15726))
+- Improve performance of user directory search. ([\#15729](https://github.com/matrix-org/synapse/issues/15729))
+- Remove redundant table join with `room_memberships` when doing a `is_host_joined()`/`is_host_invited()` call (`membership` is already part of the `current_state_events`). ([\#15731](https://github.com/matrix-org/synapse/issues/15731))
+- Remove superfluous `room_memberships` join from background update. ([\#15733](https://github.com/matrix-org/synapse/issues/15733))
+- Speed up typechecking CI. ([\#15752](https://github.com/matrix-org/synapse/issues/15752))
+- Bump minimum supported Rust version to 1.60.0. ([\#15768](https://github.com/matrix-org/synapse/issues/15768))
+
+### Updates to locked dependencies
+
+* Bump importlib-metadata from 6.1.0 to 6.6.0. ([\#15711](https://github.com/matrix-org/synapse/issues/15711))
+* Bump library/redis from 6-bullseye to 7-bullseye in /docker. ([\#15712](https://github.com/matrix-org/synapse/issues/15712))
+* Bump log from 0.4.18 to 0.4.19. ([\#15761](https://github.com/matrix-org/synapse/issues/15761))
+* Bump phonenumbers from 8.13.11 to 8.13.13. ([\#15763](https://github.com/matrix-org/synapse/issues/15763))
+* Bump pyasn1 from 0.4.8 to 0.5.0. ([\#15713](https://github.com/matrix-org/synapse/issues/15713))
+* Bump pydantic from 1.10.8 to 1.10.9. ([\#15762](https://github.com/matrix-org/synapse/issues/15762))
+* Bump pyo3-log from 0.8.1 to 0.8.2. ([\#15759](https://github.com/matrix-org/synapse/issues/15759))
+* Bump pyopenssl from 23.1.1 to 23.2.0. ([\#15765](https://github.com/matrix-org/synapse/issues/15765))
+* Bump regex from 1.7.3 to 1.8.4. ([\#15769](https://github.com/matrix-org/synapse/issues/15769))
+* Bump sentry-sdk from 1.22.1 to 1.25.0. ([\#15714](https://github.com/matrix-org/synapse/issues/15714))
+* Bump sentry-sdk from 1.25.0 to 1.25.1. ([\#15764](https://github.com/matrix-org/synapse/issues/15764))
+* Bump serde from 1.0.163 to 1.0.164. ([\#15760](https://github.com/matrix-org/synapse/issues/15760))
+* Bump types-jsonschema from 4.17.0.7 to 4.17.0.8. ([\#15716](https://github.com/matrix-org/synapse/issues/15716))
+* Bump types-pyopenssl from 23.1.0.2 to 23.2.0.0. ([\#15766](https://github.com/matrix-org/synapse/issues/15766))
+* Bump types-requests from 2.31.0.0 to 2.31.0.1. ([\#15715](https://github.com/matrix-org/synapse/issues/15715))
+
+Synapse 1.85.2 (2023-06-08)
+===========================
+
+Bugfixes
+--------
+
+- Fix regression where using TLS for HTTP replication between workers did not work. Introduced in v1.85.0. ([\#15746](https://github.com/matrix-org/synapse/issues/15746))
+
+
+Synapse 1.85.1 (2023-06-07)
+===========================
+
+Note: this release only fixes a bug that stopped some deployments from upgrading to v1.85.0. There is no need to upgrade to v1.85.1 if successfully running v1.85.0.
+
+Bugfixes
+--------
+
+- Fix bug in schema delta that broke upgrades for some deployments. Introduced in v1.85.0. ([\#15738](https://github.com/matrix-org/synapse/issues/15738), [\#15739](https://github.com/matrix-org/synapse/issues/15739))
+
+
+Synapse 1.85.0 (2023-06-06)
+===========================
+
+No significant changes since 1.85.0rc2.
+
+
+## Security advisory
+
+The following issues are fixed in 1.85.0 (and RCs).
+
+- [GHSA-26c5-ppr8-f33p](https://github.com/matrix-org/synapse/security/advisories/GHSA-26c5-ppr8-f33p) / [CVE-2023-32682](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32682) — Low Severity
+
+  It may be possible for a deactivated user to login when using uncommon configurations.
+
+- [GHSA-98px-6486-j7qc](https://github.com/matrix-org/synapse/security/advisories/GHSA-98px-6486-j7qc) / [CVE-2023-32683](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32683) — Low Severity
+
+  A discovered oEmbed or image URL can bypass the `url_preview_url_blacklist` setting potentially allowing server side request forgery or bypassing network policies. Impact is limited to IP addresses allowed by the `url_preview_ip_range_blacklist` setting (by default this only allows public IPs).
+
+See the advisories for more details. If you have any questions, email security@matrix.org.
+
+
+Synapse 1.85.0rc2 (2023-06-01)
+==============================
+
+Bugfixes
+--------
+
+- Fix a performance issue introduced in Synapse v1.83.0 which meant that purging rooms was very slow and database-intensive. ([\#15693](https://github.com/matrix-org/synapse/issues/15693))
+
+
+Deprecations and Removals
+-------------------------
+
+- Deprecate calling the `/register` endpoint with an unspecced `user` property for application services. ([\#15703](https://github.com/matrix-org/synapse/issues/15703))
+
+
+Internal Changes
+----------------
+
+- Speed up background jobs `populate_full_user_id_user_filters` and `populate_full_user_id_profiles`. ([\#15700](https://github.com/matrix-org/synapse/issues/15700))
+
+
+Synapse 1.85.0rc1 (2023-05-30)
+==============================
+
+Features
+--------
+
+- Improve performance of backfill requests by performing backfill of previously failed requests in the background. ([\#15585](https://github.com/matrix-org/synapse/issues/15585))
+- Add a new [admin API](https://matrix-org.github.io/synapse/v1.85/usage/administration/admin_api/index.html) to [create a new device for a user](https://matrix-org.github.io/synapse/v1.85/admin_api/user_admin_api.html#create-a-device). ([\#15611](https://github.com/matrix-org/synapse/issues/15611))
+- Add Unix socket support for Redis connections. Contributed by Jason Little. ([\#15644](https://github.com/matrix-org/synapse/issues/15644))
+
+
+Bugfixes
+--------
+
+- Fix a long-standing bug where setting the read marker could fail when using message retention. Contributed by Nick @ Beeper (@fizzadar). ([\#15464](https://github.com/matrix-org/synapse/issues/15464))
+- Fix a long-standing bug where the `url_preview_url_blacklist` configuration setting was not applied to oEmbed or image URLs found while previewing a URL. ([\#15601](https://github.com/matrix-org/synapse/issues/15601))
+- Fix a long-standing bug where filters with multiple backslashes were rejected. ([\#15607](https://github.com/matrix-org/synapse/issues/15607))
+- Fix a bug introduced in Synapse 1.82.0 where the error message displayed when validation of the `app_service_config_files` config option fails would be incorrectly formatted. ([\#15614](https://github.com/matrix-org/synapse/issues/15614))
+- Fix a long-standing bug where deactivated users were still able to login using the custom `org.matrix.login.jwt` login type (if enabled). ([\#15624](https://github.com/matrix-org/synapse/issues/15624))
+- Fix a long-standing bug where deactivated users were able to login in uncommon situations. ([\#15634](https://github.com/matrix-org/synapse/issues/15634))
+
+
+Improved Documentation
+----------------------
+
+- Warn users that at least 3.75GB of space is needed for the nix Synapse development environment. ([\#15613](https://github.com/matrix-org/synapse/issues/15613))
+- Remove outdated comment from the generated and sample homeserver log configs. ([\#15648](https://github.com/matrix-org/synapse/issues/15648))
+- Improve contributor docs to make it more clear that Rust is a necessary prerequisite. Contributed by @grantm. ([\#15668](https://github.com/matrix-org/synapse/issues/15668))
+
+
+Deprecations and Removals
+-------------------------
+
+- Remove the old version of the R30 (30-day retained users) phone-home metric. ([\#10428](https://github.com/matrix-org/synapse/issues/10428))
+
+
+Internal Changes
+----------------
+
+- Create dependabot changelogs at release time. ([\#15481](https://github.com/matrix-org/synapse/issues/15481))
+- Add not null constraint to column `full_user_id` of tables `profiles` and `user_filters`. ([\#15537](https://github.com/matrix-org/synapse/issues/15537))
+- Allow connecting to HTTP Replication Endpoints by using `worker_name` when constructing the request. ([\#15578](https://github.com/matrix-org/synapse/issues/15578))
+- Make the `thread_id` column on `event_push_actions`, `event_push_actions_staging`, and `event_push_summary` non-null. ([\#15597](https://github.com/matrix-org/synapse/issues/15597))
+- Run mypy type checking with the minimum supported Python version to catch new usage that isn't backwards-compatible. ([\#15602](https://github.com/matrix-org/synapse/issues/15602))
+- Fix subscriptable type usage in Python <3.9. ([\#15604](https://github.com/matrix-org/synapse/issues/15604))
+- Update internal terminology. ([\#15606](https://github.com/matrix-org/synapse/issues/15606), [\#15620](https://github.com/matrix-org/synapse/issues/15620))
+- Instrument `state` and `state_group` storage-related operations to better picture what's happening when tracing. ([\#15610](https://github.com/matrix-org/synapse/issues/15610), [\#15647](https://github.com/matrix-org/synapse/issues/15647))
+- Trace how many new events from the backfill response we need to process. ([\#15633](https://github.com/matrix-org/synapse/issues/15633))
+- Re-type config paths in `ConfigError`s to be `StrSequence`s instead of `Iterable[str]`s. ([\#15615](https://github.com/matrix-org/synapse/issues/15615))
+- Update Mutual Rooms ([MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666)) implementation to match new proposal text. ([\#15621](https://github.com/matrix-org/synapse/issues/15621))
+- Remove the unstable identifiers from faster joins ([MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706)). ([\#15625](https://github.com/matrix-org/synapse/issues/15625))
+- Fix the olddeps CI. ([\#15626](https://github.com/matrix-org/synapse/issues/15626))
+- Remove duplicate timestamp from test logs (`_trial_temp/test.log`). ([\#15636](https://github.com/matrix-org/synapse/issues/15636))
+- Fix two memory leaks in `trial` test runs. ([\#15630](https://github.com/matrix-org/synapse/issues/15630))
+- Limit the size of the `HomeServerConfig` cache in trial test runs. ([\#15646](https://github.com/matrix-org/synapse/issues/15646))
+- Improve type hints. ([\#15658](https://github.com/matrix-org/synapse/issues/15658), [\#15659](https://github.com/matrix-org/synapse/issues/15659))
+- Add requesting user id parameter to key claim methods in `TransportLayerClient`. ([\#15663](https://github.com/matrix-org/synapse/issues/15663))
+- Speed up rebuilding of the user directory for local users. ([\#15665](https://github.com/matrix-org/synapse/issues/15665))
+- Implement "option 2" for [MSC3820](https://github.com/matrix-org/matrix-spec-proposals/pull/3820): Room version 11. ([\#15666](https://github.com/matrix-org/synapse/issues/15666), [\#15678](https://github.com/matrix-org/synapse/issues/15678))
+
+### Updates to locked dependencies
+
+* Bump furo from 2023.3.27 to 2023.5.20. ([\#15642](https://github.com/matrix-org/synapse/issues/15642))
+* Bump log from 0.4.17 to 0.4.18. ([\#15681](https://github.com/matrix-org/synapse/issues/15681))
+* Bump prometheus-client from 0.16.0 to 0.17.0. ([\#15682](https://github.com/matrix-org/synapse/issues/15682))
+* Bump pydantic from 1.10.7 to 1.10.8. ([\#15685](https://github.com/matrix-org/synapse/issues/15685))
+* Bump pygithub from 1.58.1 to 1.58.2. ([\#15643](https://github.com/matrix-org/synapse/issues/15643))
+* Bump requests from 2.28.2 to 2.31.0. ([\#15651](https://github.com/matrix-org/synapse/issues/15651))
+* Bump sphinx from 6.1.3 to 6.2.1. ([\#15641](https://github.com/matrix-org/synapse/issues/15641))
+* Bump types-bleach from 6.0.0.1 to 6.0.0.3. ([\#15686](https://github.com/matrix-org/synapse/issues/15686))
+* Bump types-pillow from 9.5.0.2 to 9.5.0.4. ([\#15640](https://github.com/matrix-org/synapse/issues/15640))
+* Bump types-pyyaml from 6.0.12.9 to 6.0.12.10. ([\#15683](https://github.com/matrix-org/synapse/issues/15683))
+* Bump types-requests from 2.30.0.0 to 2.31.0.0. ([\#15684](https://github.com/matrix-org/synapse/issues/15684))
+* Bump types-setuptools from 67.7.0.2 to 67.8.0.0. ([\#15639](https://github.com/matrix-org/synapse/issues/15639))
+
+Synapse 1.84.1 (2023-05-26)
+===========================
+
+This patch release fixes a major issue with homeservers that do not have an `instance_map` defined but which do use workers.
+If you have already upgraded to Synapse 1.84.0 and your homeserver is working normally, then there is no need to update to this patch release.
+
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse v1.84.0 where workers do not start up when no `instance_map` was provided. ([\#15672](https://github.com/matrix-org/synapse/issues/15672))
+
+
+Internal Changes
+----------------
+
+- Add `dch` and `notify-send` to the development Nix flake so that the release script can be used. ([\#15673](https://github.com/matrix-org/synapse/issues/15673))
+
+
+Synapse 1.84.0 (2023-05-23)
+===========================
+
+The `worker_replication_*` configuration settings have been deprecated in favour of configuring the main process consistently with other instances in the `instance_map`. The deprecated settings will be removed in Synapse v1.88.0, but changing your configuration in advance is recommended. See the [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.84/docs/upgrade.md#upgrading-to-v1840) for more information.
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.84.0rc1 where errors during startup were not reported correctly on Python < 3.10. ([\#15599](https://github.com/matrix-org/synapse/issues/15599))
+
+
+Synapse 1.84.0rc1 (2023-05-16)
+==============================
+
+Features
+--------
+
+- Add an option to prevent media downloads from configured domains. ([\#15197](https://github.com/matrix-org/synapse/issues/15197))
+- Add `forget_rooms_on_leave` config option to automatically forget rooms when users leave them or are removed from them. ([\#15224](https://github.com/matrix-org/synapse/issues/15224))
+- Add redis TLS configuration options. ([\#15312](https://github.com/matrix-org/synapse/issues/15312))
+- Add a config option to delay push notifications by a random amount, to discourage time-based profiling. ([\#15516](https://github.com/matrix-org/synapse/issues/15516))
+- Stabilize support for [MSC2659](https://github.com/matrix-org/matrix-spec-proposals/pull/2659): application service ping endpoint. Contributed by Tulir @ Beeper. ([\#15528](https://github.com/matrix-org/synapse/issues/15528))
+- Implement [MSC4009](https://github.com/matrix-org/matrix-spec-proposals/pull/4009) to expand the supported characters in Matrix IDs. ([\#15536](https://github.com/matrix-org/synapse/issues/15536))
+- Advertise support for Matrix 1.6 on `/_matrix/client/versions`. ([\#15559](https://github.com/matrix-org/synapse/issues/15559))
+- Print full error and stack-trace of any exception that occurs during startup/initialization. ([\#15569](https://github.com/matrix-org/synapse/issues/15569))
+
+
+Bugfixes
+--------
+
+- Don't fail on federation over TOR where SRV queries are not supported. Contributed by Zdzichu. ([\#15523](https://github.com/matrix-org/synapse/issues/15523))
+- Experimental support for [MSC4010](https://github.com/matrix-org/matrix-spec-proposals/pull/4010) which rejects setting the `"m.push_rules"` via account data. ([\#15554](https://github.com/matrix-org/synapse/issues/15554), [\#15555](https://github.com/matrix-org/synapse/issues/15555))
+- Fix a long-standing bug where an invalid membership event could cause an internal server error. ([\#15564](https://github.com/matrix-org/synapse/issues/15564))
+- Require at least poetry-core v1.1.0. ([\#15566](https://github.com/matrix-org/synapse/issues/15566), [\#15571](https://github.com/matrix-org/synapse/issues/15571))
+
+
+Deprecations and Removals
+-------------------------
+
+- Remove need for `worker_replication_*` based settings in worker configuration yaml by placing this data directly on the `instance_map` instead. ([\#15491](https://github.com/matrix-org/synapse/issues/15491))
+
+
+Updates to the Docker image
+---------------------------
+
+- Add pkg-config package to Stage 0 to be able to build Dockerfile on ppc64le architecture. ([\#15567](https://github.com/matrix-org/synapse/issues/15567))
+
+
+Improved Documentation
+----------------------
+
+- Clarify documentation of the "Create or modify account" Admin API. ([\#15544](https://github.com/matrix-org/synapse/issues/15544))
+- Fix path to the `statistics/database/rooms` admin API in documentation. ([\#15560](https://github.com/matrix-org/synapse/issues/15560))
+- Update and improve Mastodon Single Sign-On documentation. ([\#15587](https://github.com/matrix-org/synapse/issues/15587))
+
+
+Internal Changes
+----------------
+
+- Use oEmbed to generate URL previews for YouTube Shorts. ([\#15025](https://github.com/matrix-org/synapse/issues/15025))
+- Create new `Client` for use with HTTP Replication between workers. Contributed by Jason Little. ([\#15470](https://github.com/matrix-org/synapse/issues/15470))
+- Bump pyicu from 2.10.2 to 2.11. ([\#15509](https://github.com/matrix-org/synapse/issues/15509))
+- Remove references to supporting per-user flag for [MSC2654](https://github.com/matrix-org/matrix-spec-proposals/pull/2654). ([\#15522](https://github.com/matrix-org/synapse/issues/15522))
+- Don't use a trusted key server when running the demo scripts. ([\#15527](https://github.com/matrix-org/synapse/issues/15527))
+- Speed up rebuilding of the user directory for local users. ([\#15529](https://github.com/matrix-org/synapse/issues/15529))
+- Speed up deleting of old rows in `event_push_actions`. ([\#15531](https://github.com/matrix-org/synapse/issues/15531))
+- Install the `xmlsec` and `mdbook` packages and switch back to the upstream [cachix/devenv](https://github.com/cachix/devenv) repo in the nix development environment. ([\#15532](https://github.com/matrix-org/synapse/issues/15532), [\#15533](https://github.com/matrix-org/synapse/issues/15533), [\#15545](https://github.com/matrix-org/synapse/issues/15545))
+- Implement [MSC3987](https://github.com/matrix-org/matrix-spec-proposals/pull/3987) by removing `"dont_notify"` from the list of actions in default push rules. ([\#15534](https://github.com/matrix-org/synapse/issues/15534))
+- Move various module API callback registration methods to a dedicated class. ([\#15535](https://github.com/matrix-org/synapse/issues/15535))
+- Proxy `/user/devices` federation queries to application services for [MSC3984](https://github.com/matrix-org/matrix-spec-proposals/pull/3984). ([\#15539](https://github.com/matrix-org/synapse/issues/15539))
+- Factor out an `is_mine_server_name` method. ([\#15542](https://github.com/matrix-org/synapse/issues/15542))
+- Allow running Complement tests using [podman](https://podman.io/) by adding a `PODMAN` environment variable to `scripts-dev/complement.sh`. ([\#15543](https://github.com/matrix-org/synapse/issues/15543))
+- Bump serde from 1.0.160 to 1.0.162. ([\#15548](https://github.com/matrix-org/synapse/issues/15548))
+- Bump types-setuptools from 67.6.0.5 to 67.7.0.1. ([\#15549](https://github.com/matrix-org/synapse/issues/15549))
+- Bump sentry-sdk from 1.19.1 to 1.22.1. ([\#15550](https://github.com/matrix-org/synapse/issues/15550))
+- Bump ruff from 0.0.259 to 0.0.265. ([\#15551](https://github.com/matrix-org/synapse/issues/15551))
+- Bump hiredis from 2.2.2 to 2.2.3. ([\#15552](https://github.com/matrix-org/synapse/issues/15552))
+- Bump types-requests from 2.29.0.0 to 2.30.0.0. ([\#15553](https://github.com/matrix-org/synapse/issues/15553))
+- Add `org.matrix.msc3981` info to `/_matrix/client/versions`. ([\#15558](https://github.com/matrix-org/synapse/issues/15558))
+- Declare unstable support for [MSC3391](https://github.com/matrix-org/matrix-spec-proposals/pull/3391) under `/_matrix/client/versions` if the experimental implementation is enabled. ([\#15562](https://github.com/matrix-org/synapse/issues/15562))
+- Implement [MSC3821](https://github.com/matrix-org/matrix-spec-proposals/pull/3821) to update the redaction rules. ([\#15563](https://github.com/matrix-org/synapse/issues/15563))
+- Implement updated redaction rules from [MSC3389](https://github.com/matrix-org/matrix-spec-proposals/pull/3389). ([\#15565](https://github.com/matrix-org/synapse/issues/15565))
+- Allow `pip install` to use setuptools_rust 1.6.0 when building Synapse. ([\#15570](https://github.com/matrix-org/synapse/issues/15570))
+- Deal with upcoming Github Actions deprecations. ([\#15576](https://github.com/matrix-org/synapse/issues/15576))
+- Export `run_as_background_process` from the module API. ([\#15577](https://github.com/matrix-org/synapse/issues/15577))
+- Update build system requirements to allow building with poetry-core==1.6.0. ([\#15588](https://github.com/matrix-org/synapse/issues/15588))
+- Bump serde from 1.0.162 to 1.0.163. ([\#15589](https://github.com/matrix-org/synapse/issues/15589))
+- Bump phonenumbers from 8.13.7 to 8.13.11. ([\#15590](https://github.com/matrix-org/synapse/issues/15590))
+- Bump types-psycopg2 from 2.9.21.9 to 2.9.21.10. ([\#15591](https://github.com/matrix-org/synapse/issues/15591))
+- Bump types-commonmark from 0.9.2.2 to 0.9.2.3. ([\#15592](https://github.com/matrix-org/synapse/issues/15592))
+- Bump types-setuptools from 67.7.0.1 to 67.7.0.2. ([\#15594](https://github.com/matrix-org/synapse/issues/15594))
+
+
+Synapse 1.83.0 (2023-05-09)
+===========================
+
+No significant changes since 1.83.0rc1.
+
+
+Synapse 1.83.0rc1 (2023-05-02)
+==============================
+
+Features
+--------
+
+- Experimental support to recursively provide relations per [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981). ([\#15315](https://github.com/matrix-org/synapse/issues/15315))
+- Experimental support for [MSC3970](https://github.com/matrix-org/matrix-spec-proposals/pull/3970): Scope transaction IDs to devices. ([\#15318](https://github.com/matrix-org/synapse/issues/15318))
+- Add an [admin API endpoint](https://matrix-org.github.io/synapse/v1.83/admin_api/experimental_features.html) to support per-user feature flags. ([\#15344](https://github.com/matrix-org/synapse/issues/15344))
+- Add a module API to send an HTTP push notification. ([\#15387](https://github.com/matrix-org/synapse/issues/15387))
+- Add an [admin API endpoint](https://matrix-org.github.io/synapse/v1.83/admin_api/statistics.html#get-largest-rooms-by-size-in-database) to query the largest rooms by disk space used in the database. ([\#15482](https://github.com/matrix-org/synapse/issues/15482))
+
+
+Bugfixes
+--------
+
+- Disable push rule evaluation for rooms excluded from sync. ([\#15361](https://github.com/matrix-org/synapse/issues/15361))
+- Fix a long-standing bug where cached server key results which were directly fetched would not be properly re-used. ([\#15417](https://github.com/matrix-org/synapse/issues/15417))
+- Fix a bug introduced in Synapse 1.73.0 where some experimental push rules were returned by default. ([\#15494](https://github.com/matrix-org/synapse/issues/15494))
+
+
+Improved Documentation
+----------------------
+
+- Add Nginx loadbalancing example with sticky mxid for workers. ([\#15411](https://github.com/matrix-org/synapse/issues/15411))
+- Update outdated development docs that mention restrictions in versions of SQLite that we no longer support. ([\#15498](https://github.com/matrix-org/synapse/issues/15498))
+
+
+Internal Changes
+----------------
+
+- Speedup tests by caching HomeServerConfig instances. ([\#15284](https://github.com/matrix-org/synapse/issues/15284))
+- Add denormalised event stream ordering column to membership state tables for future use. Contributed by Nick @ Beeper (@fizzadar). ([\#15356](https://github.com/matrix-org/synapse/issues/15356))
+- Always use multi-user device resync replication endpoints. ([\#15418](https://github.com/matrix-org/synapse/issues/15418))
+- Add column `full_user_id` to tables `profiles` and `user_filters`. ([\#15458](https://github.com/matrix-org/synapse/issues/15458))
+- Update support for [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983) to allow always returning fallback-keys in a `/keys/claim` request. ([\#15462](https://github.com/matrix-org/synapse/issues/15462))
+- Improve type hints. ([\#15465](https://github.com/matrix-org/synapse/issues/15465), [\#15496](https://github.com/matrix-org/synapse/issues/15496), [\#15497](https://github.com/matrix-org/synapse/issues/15497))
+- Support claiming more than one OTK at a time. ([\#15468](https://github.com/matrix-org/synapse/issues/15468))
+- Bump types-pyyaml from 6.0.12.8 to 6.0.12.9. ([\#15471](https://github.com/matrix-org/synapse/issues/15471))
+- Bump pyasn1-modules from 0.2.8 to 0.3.0. ([\#15473](https://github.com/matrix-org/synapse/issues/15473))
+- Bump cryptography from 40.0.1 to 40.0.2. ([\#15474](https://github.com/matrix-org/synapse/issues/15474))
+- Bump types-netaddr from 0.8.0.7 to 0.8.0.8. ([\#15475](https://github.com/matrix-org/synapse/issues/15475))
+- Bump types-jsonschema from 4.17.0.6 to 4.17.0.7. ([\#15476](https://github.com/matrix-org/synapse/issues/15476))
+- Ask bug reporters to provide logs as text. ([\#15479](https://github.com/matrix-org/synapse/issues/15479))
+- Add a Nix flake for use as a development environment. ([\#15495](https://github.com/matrix-org/synapse/issues/15495))
+- Bump anyhow from 1.0.70 to 1.0.71. ([\#15507](https://github.com/matrix-org/synapse/issues/15507))
+- Bump types-pillow from 9.4.0.19 to 9.5.0.2. ([\#15508](https://github.com/matrix-org/synapse/issues/15508))
+- Bump packaging from 23.0 to 23.1. ([\#15510](https://github.com/matrix-org/synapse/issues/15510))
+- Bump types-requests from 2.28.11.16 to 2.29.0.0. ([\#15511](https://github.com/matrix-org/synapse/issues/15511))
+- Bump setuptools-rust from 1.5.2 to 1.6.0. ([\#15512](https://github.com/matrix-org/synapse/issues/15512))
+- Update the check_schema_delta script to account for when the schema version has been bumped locally. ([\#15466](https://github.com/matrix-org/synapse/issues/15466))
+
+
+Synapse 1.82.0 (2023-04-25)
+===========================
+
+No significant changes since 1.82.0rc1.
+
+
+Synapse 1.82.0rc1 (2023-04-18)
+==============================
+
+Features
+--------
+
+- Allow loading the `/directory/room/{roomAlias}` endpoint on workers. ([\#15333](https://github.com/matrix-org/synapse/issues/15333))
+- Add some validation to `instance_map` configuration loading. ([\#15431](https://github.com/matrix-org/synapse/issues/15431))
+- Allow loading the `/capabilities` endpoint on workers. ([\#15436](https://github.com/matrix-org/synapse/issues/15436))
+
+
+Bugfixes
+--------
+
+- Delete server-side backup keys when deactivating an account. ([\#15181](https://github.com/matrix-org/synapse/issues/15181))
+- Fix and document untold assumption that `on_logged_out` module hooks will be called before the deletion of pushers. ([\#15410](https://github.com/matrix-org/synapse/issues/15410))
+- Improve robustness when handling a perspective key response by deduplicating received server keys. ([\#15423](https://github.com/matrix-org/synapse/issues/15423))
+- Synapse now correctly fails to start if the config option `app_service_config_files` is not a list. ([\#15425](https://github.com/matrix-org/synapse/issues/15425))
+- Disable loading `RefreshTokenServlet` (`/_matrix/client/(r0|v3|unstable)/refresh`) on workers. ([\#15428](https://github.com/matrix-org/synapse/issues/15428))
+
+
+Improved Documentation
+----------------------
+
+- Note that the `delete_stale_devices_after` background job always runs on the main process. ([\#15452](https://github.com/matrix-org/synapse/issues/15452))
+
+
+Deprecations and Removals
+-------------------------
+
+- Remove the broken, unspecced registration fallback. Note that the *login* fallback is unaffected by this change. ([\#15405](https://github.com/matrix-org/synapse/issues/15405))
+
+
+Internal Changes
+----------------
+
+- Bump black from 23.1.0 to 23.3.0. ([\#15372](https://github.com/matrix-org/synapse/issues/15372))
+- Bump pyopenssl from 23.1.0 to 23.1.1. ([\#15373](https://github.com/matrix-org/synapse/issues/15373))
+- Bump types-psycopg2 from 2.9.21.8 to 2.9.21.9. ([\#15374](https://github.com/matrix-org/synapse/issues/15374))
+- Bump types-netaddr from 0.8.0.6 to 0.8.0.7. ([\#15375](https://github.com/matrix-org/synapse/issues/15375))
+- Bump types-opentracing from 2.4.10.3 to 2.4.10.4. ([\#15376](https://github.com/matrix-org/synapse/issues/15376))
+- Bump dawidd6/action-download-artifact from 2.26.0 to 2.26.1. ([\#15404](https://github.com/matrix-org/synapse/issues/15404))
+- Bump parameterized from 0.8.1 to 0.9.0. ([\#15412](https://github.com/matrix-org/synapse/issues/15412))
+- Bump types-pillow from 9.4.0.17 to 9.4.0.19. ([\#15413](https://github.com/matrix-org/synapse/issues/15413))
+- Bump sentry-sdk from 1.17.0 to 1.19.1. ([\#15414](https://github.com/matrix-org/synapse/issues/15414))
+- Bump immutabledict from 2.2.3 to 2.2.4. ([\#15415](https://github.com/matrix-org/synapse/issues/15415))
+- Bump dawidd6/action-download-artifact from 2.26.1 to 2.27.0. ([\#15441](https://github.com/matrix-org/synapse/issues/15441))
+- Bump serde_json from 1.0.95 to 1.0.96. ([\#15442](https://github.com/matrix-org/synapse/issues/15442))
+- Bump serde from 1.0.159 to 1.0.160. ([\#15443](https://github.com/matrix-org/synapse/issues/15443))
+- Bump pillow from 9.4.0 to 9.5.0. ([\#15444](https://github.com/matrix-org/synapse/issues/15444))
+- Bump furo from 2023.3.23 to 2023.3.27. ([\#15445](https://github.com/matrix-org/synapse/issues/15445))
+- Bump types-pyopenssl from 23.1.0.0 to 23.1.0.2. ([\#15446](https://github.com/matrix-org/synapse/issues/15446))
+- Bump mypy from 1.0.0 to 1.0.1. ([\#15447](https://github.com/matrix-org/synapse/issues/15447))
+- Bump psycopg2 from 2.9.5 to 2.9.6. ([\#15448](https://github.com/matrix-org/synapse/issues/15448))
+- Improve DB performance of clearing out old data from `stream_ordering_to_exterm`. ([\#15382](https://github.com/matrix-org/synapse/issues/15382), [\#15429](https://github.com/matrix-org/synapse/issues/15429))
+- Implement [MSC3989](https://github.com/matrix-org/matrix-spec-proposals/pull/3989) redaction algorithm. ([\#15393](https://github.com/matrix-org/synapse/issues/15393))
+- Implement [MSC2175](https://github.com/matrix-org/matrix-doc/pull/2175) to stop adding `creator` to create events. ([\#15394](https://github.com/matrix-org/synapse/issues/15394))
+- Implement [MSC2174](https://github.com/matrix-org/matrix-spec-proposals/pull/2174) to move the `redacts` key to a `content` property. ([\#15395](https://github.com/matrix-org/synapse/issues/15395))
+- Trust dtonlay/rust-toolchain in CI. ([\#15406](https://github.com/matrix-org/synapse/issues/15406))
+- Explicitly install Synapse during typechecking in CI. ([\#15409](https://github.com/matrix-org/synapse/issues/15409))
+- Only load the SSO redirect servlet if SSO is enabled. ([\#15421](https://github.com/matrix-org/synapse/issues/15421))
+- Refactor `SimpleHttpClient` to pull out a base class. ([\#15427](https://github.com/matrix-org/synapse/issues/15427))
+- Improve type hints. ([\#15432](https://github.com/matrix-org/synapse/issues/15432))
+- Convert async to normal tests in `TestSSOHandler`. ([\#15433](https://github.com/matrix-org/synapse/issues/15433))
+- Speed up the user directory background update. ([\#15435](https://github.com/matrix-org/synapse/issues/15435))
+- Disable directory listing for static resources in `/_matrix/static/`. ([\#15438](https://github.com/matrix-org/synapse/issues/15438))
+- Move various module API callback registration methods to a dedicated class. ([\#15453](https://github.com/matrix-org/synapse/issues/15453))
+
+
+Synapse 1.81.0 (2023-04-11)
+===========================
+
+Synapse now attempts the versioned appservice paths before falling back to the
+[legacy paths](https://spec.matrix.org/v1.6/application-service-api/#legacy-routes).
+Usage of the legacy routes should be considered deprecated.
+
+Additionally, Synapse has supported sending the application service access token
+via [the `Authorization` header](https://spec.matrix.org/v1.6/application-service-api/#authorization)
+since v1.70.0. For backwards compatibility it is *also* sent as the `access_token`
+query parameter. This is insecure and should be considered deprecated.
+
+A future version of Synapse (v1.88.0 or later) will remove support for legacy
+application service routes and query parameter authorization.
+
+
+No significant changes since 1.81.0rc2.
+
+
+Synapse 1.81.0rc2 (2023-04-06)
+==============================
+
+Bugfixes
+--------
+
+- Fix the `set_device_id_for_pushers_txn` background update crash. ([\#15391](https://github.com/matrix-org/synapse/issues/15391))
+
+
+Internal Changes
+----------------
+
+- Update CI to run complement under the latest stable go version. ([\#15403](https://github.com/matrix-org/synapse/issues/15403))
+
+
+Synapse 1.81.0rc1 (2023-04-04)
+==============================
+
+Features
+--------
+
+- Add the ability to enable/disable registrations when in the OIDC flow. ([\#14978](https://github.com/matrix-org/synapse/issues/14978))
+- Add a primitive helper script for listing worker endpoints. ([\#15243](https://github.com/matrix-org/synapse/issues/15243))
+- Experimental support for passing One Time Key and device key requests to application services ([MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983) and [MSC3984](https://github.com/matrix-org/matrix-spec-proposals/pull/3984)). ([\#15314](https://github.com/matrix-org/synapse/issues/15314), [\#15321](https://github.com/matrix-org/synapse/issues/15321))
+- Allow loading `/password_policy` endpoint on workers. ([\#15331](https://github.com/matrix-org/synapse/issues/15331))
+- Add experimental support for Unix sockets. Contributed by Jason Little. ([\#15353](https://github.com/matrix-org/synapse/issues/15353))
+- Build Debian packages for Ubuntu 23.04 (Lunar Lobster). ([\#15381](https://github.com/matrix-org/synapse/issues/15381))
+
+
+Bugfixes
+--------
+
+- Fix a long-standing bug where edits of non-`m.room.message` events would not be correctly bundled. ([\#15295](https://github.com/matrix-org/synapse/issues/15295))
+- Fix a bug introduced in Synapse v1.55.0 which could delay remote homeservers being able to decrypt encrypted messages sent by local users. ([\#15297](https://github.com/matrix-org/synapse/issues/15297))
+- Add a check to [SQLite port_db script](https://matrix-org.github.io/synapse/latest/postgres.html#porting-from-sqlite)
+  to ensure that the sqlite database passed to the script exists before trying to port from it. ([\#15306](https://github.com/matrix-org/synapse/issues/15306))
+- Fix a bug introduced in Synapse 1.76.0 where responses from worker deployments could include an internal `_INT_STREAM_POS` key. ([\#15309](https://github.com/matrix-org/synapse/issues/15309))
+- Fix a long-standing bug that Synpase only used the [legacy appservice routes](https://spec.matrix.org/v1.6/application-service-api/#legacy-routes). ([\#15317](https://github.com/matrix-org/synapse/issues/15317))
+- Fix a long-standing bug preventing users from rejoining rooms after being banned and unbanned over federation. Contributed by Nico. ([\#15323](https://github.com/matrix-org/synapse/issues/15323))
+- Fix bug in worker mode where on a rolling restart of workers the "typing" worker would consume 100% CPU until it got restarted. ([\#15332](https://github.com/matrix-org/synapse/issues/15332))
+- Fix a long-standing bug where some to_device messages could be dropped when using workers. ([\#15349](https://github.com/matrix-org/synapse/issues/15349))
+- Fix a bug introduced in Synapse 1.70.0 where the background sync from a faster join could spin for hours when one of the events involved had been marked for backoff. ([\#15351](https://github.com/matrix-org/synapse/issues/15351))
+- Fix missing app variable in mail subject for password resets. Contributed by Cyberes. ([\#15352](https://github.com/matrix-org/synapse/issues/15352))
+- Fix a rare bug introduced in Synapse 1.66.0 where initial syncs would fail when the user had been kicked from a faster joined room that had not finished syncing. ([\#15383](https://github.com/matrix-org/synapse/issues/15383))
+
+
+Improved Documentation
+----------------------
+
+- Fix a typo in login requests ratelimit defaults. ([\#15341](https://github.com/matrix-org/synapse/issues/15341))
+- Add some clarification to the doc/comments regarding TCP replication. ([\#15354](https://github.com/matrix-org/synapse/issues/15354))
+- Note that Synapse 1.74 queued a rebuild of the user directory tables. ([\#15386](https://github.com/matrix-org/synapse/issues/15386))
+
+
+Internal Changes
+----------------
+
+- Use `immutabledict` instead of `frozendict`. ([\#15113](https://github.com/matrix-org/synapse/issues/15113))
+- Add developer documentation for the Federation Sender and add a documentation mechanism using Sphinx. ([\#15265](https://github.com/matrix-org/synapse/issues/15265), [\#15336](https://github.com/matrix-org/synapse/issues/15336))
+- Make the pushers rely on the `device_id` instead of the `access_token_id` for various operations. ([\#15280](https://github.com/matrix-org/synapse/issues/15280))
+- Bump sentry-sdk from 1.15.0 to 1.17.0. ([\#15285](https://github.com/matrix-org/synapse/issues/15285))
+- Allow running the Twisted trunk job against other branches. ([\#15302](https://github.com/matrix-org/synapse/issues/15302))
+- Remind the releaser to ask for changelog feedback in [#synapse-dev](https://matrix.to/#/#synapse-dev:matrix.org). ([\#15303](https://github.com/matrix-org/synapse/issues/15303))
+- Bump dtolnay/rust-toolchain from e12eda571dc9a5ee5d58eecf4738ec291c66f295 to fc3253060d0c959bea12a59f10f8391454a0b02d. ([\#15304](https://github.com/matrix-org/synapse/issues/15304))
+- Reject events with an invalid "mentions" property per [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952). ([\#15311](https://github.com/matrix-org/synapse/issues/15311))
+- As an optimisation, use `TRUNCATE` on Postgres when clearing the user directory tables. ([\#15316](https://github.com/matrix-org/synapse/issues/15316))
+- Fix `.gitignore` rule for the Complement source tarball downloaded automatically by `complement.sh`. ([\#15319](https://github.com/matrix-org/synapse/issues/15319))
+- Bump serde from 1.0.157 to 1.0.158. ([\#15324](https://github.com/matrix-org/synapse/issues/15324))
+- Bump regex from 1.7.1 to 1.7.3. ([\#15325](https://github.com/matrix-org/synapse/issues/15325))
+- Bump types-pyopenssl from 23.0.0.4 to 23.1.0.0. ([\#15326](https://github.com/matrix-org/synapse/issues/15326))
+- Bump furo from 2022.12.7 to 2023.3.23. ([\#15327](https://github.com/matrix-org/synapse/issues/15327))
+- Bump ruff from 0.0.252 to 0.0.259. ([\#15328](https://github.com/matrix-org/synapse/issues/15328))
+- Bump cryptography from 40.0.0 to 40.0.1. ([\#15329](https://github.com/matrix-org/synapse/issues/15329))
+- Bump mypy-zope from 0.9.0 to 0.9.1. ([\#15330](https://github.com/matrix-org/synapse/issues/15330))
+- Speed up unit tests when using SQLite3. ([\#15334](https://github.com/matrix-org/synapse/issues/15334))
+- Speed up pydantic CI job. ([\#15339](https://github.com/matrix-org/synapse/issues/15339))
+- Speed up sample config CI job. ([\#15340](https://github.com/matrix-org/synapse/issues/15340))
+- Fix copyright year in SSO footer template. ([\#15358](https://github.com/matrix-org/synapse/issues/15358))
+- Bump peaceiris/actions-gh-pages from 3.9.2 to 3.9.3. ([\#15369](https://github.com/matrix-org/synapse/issues/15369))
+- Bump serde from 1.0.158 to 1.0.159. ([\#15370](https://github.com/matrix-org/synapse/issues/15370))
+- Bump serde_json from 1.0.94 to 1.0.95. ([\#15371](https://github.com/matrix-org/synapse/issues/15371))
+- Speed up membership queries for users with forgotten rooms. ([\#15385](https://github.com/matrix-org/synapse/issues/15385))
+
+
+Synapse 1.80.0 (2023-03-28)
+===========================
+
+No significant changes since 1.80.0rc2.
+
+
+Synapse 1.80.0rc2 (2023-03-22)
+==============================
+
+Bugfixes
+--------
+
+- Fix a bug in which the [`POST /_matrix/client/v3/rooms/{roomId}/report/{eventId}`](https://spec.matrix.org/v1.6/client-server-api/#post_matrixclientv3roomsroomidreporteventid) endpoint would return the wrong error if the user did not have permission to view the event. This aligns Synapse's implementation with [MSC2249](https://github.com/matrix-org/matrix-spec-proposals/pull/2249). ([\#15298](https://github.com/matrix-org/synapse/issues/15298), [\#15300](https://github.com/matrix-org/synapse/issues/15300))
+- Fix a bug introduced in Synapse 1.75.0rc1 where the [SQLite port_db script](https://matrix-org.github.io/synapse/latest/postgres.html#porting-from-sqlite)
+  would fail to open the SQLite database. ([\#15301](https://github.com/matrix-org/synapse/issues/15301))
+
+
+Synapse 1.80.0rc1 (2023-03-21)
+==============================
+
+Features
+--------
+
+- Stabilise support for [MSC3966](https://github.com/matrix-org/matrix-spec-proposals/pull/3966): `event_property_contains` push condition. ([\#15187](https://github.com/matrix-org/synapse/issues/15187))
+- Implement [MSC2659](https://github.com/matrix-org/matrix-spec-proposals/pull/2659): application service ping endpoint. Contributed by Tulir @ Beeper. ([\#15249](https://github.com/matrix-org/synapse/issues/15249))
+- Allow loading `/register/available` endpoint on workers. ([\#15268](https://github.com/matrix-org/synapse/issues/15268))
+- Improve performance of creating and authenticating events. ([\#15195](https://github.com/matrix-org/synapse/issues/15195))
+- Add topic and name events to group of events that are batch persisted when creating a room. ([\#15229](https://github.com/matrix-org/synapse/issues/15229))
+
+
+Bugfixes
+--------
+
+- Fix a long-standing bug in which the user directory would assume any remote membership state events represent a profile change. ([\#14755](https://github.com/matrix-org/synapse/issues/14755), [\#14756](https://github.com/matrix-org/synapse/issues/14756))
+- Implement [MSC3873](https://github.com/matrix-org/matrix-spec-proposals/pull/3873) to fix a long-standing bug where properties with dots were handled ambiguously in push rules. ([\#15190](https://github.com/matrix-org/synapse/issues/15190))
+- Faster joins: Fix a bug introduced in Synapse 1.66 where spurious "Failed to find memberships ..." errors would be logged. ([\#15232](https://github.com/matrix-org/synapse/issues/15232))
+- Fix a long-standing error when sending message into deleted room. ([\#15235](https://github.com/matrix-org/synapse/issues/15235))
+
+
+Updates to the Docker image
+---------------------------
+
+- Ensure the Dockerfile builds on platforms that don't have a `cryptography` wheel. ([\#15239](https://github.com/matrix-org/synapse/issues/15239))
+- Mirror images to the GitHub Container Registry (`ghcr.io/matrix-org/synapse`). ([\#15281](https://github.com/matrix-org/synapse/issues/15281), [\#15282](https://github.com/matrix-org/synapse/issues/15282))
+
+
+Improved Documentation
+----------------------
+
+- Add a missing endpoint to the workers documentation. ([\#15223](https://github.com/matrix-org/synapse/issues/15223))
+
+
+Internal Changes
+----------------
+
+- Add additional functionality to declaring worker types when starting Complement in worker mode. ([\#14921](https://github.com/matrix-org/synapse/issues/14921))
+- Add `Synapse-Trace-Id` to `access-control-expose-headers` header. ([\#14974](https://github.com/matrix-org/synapse/issues/14974))
+- Make the `HttpTransactionCache` use the `Requester` in addition of the just the `Request` to build the transaction key. ([\#15200](https://github.com/matrix-org/synapse/issues/15200))
+- Improve log lines when purging rooms. ([\#15222](https://github.com/matrix-org/synapse/issues/15222))
+- Improve type hints. ([\#15230](https://github.com/matrix-org/synapse/issues/15230), [\#15231](https://github.com/matrix-org/synapse/issues/15231), [\#15238](https://github.com/matrix-org/synapse/issues/15238))
+- Move various module API callback registration methods to a dedicated class. ([\#15237](https://github.com/matrix-org/synapse/issues/15237))
+- Configure GitHub Actions for merge queues. ([\#15244](https://github.com/matrix-org/synapse/issues/15244))
+- Add schema comments about the `destinations` and `destination_rooms` tables. ([\#15247](https://github.com/matrix-org/synapse/issues/15247))
+- Skip processing of auto-join room behaviour if there are no auto-join rooms configured. ([\#15262](https://github.com/matrix-org/synapse/issues/15262))
+- Remove unused store method `_set_destination_retry_timings_emulated`. ([\#15266](https://github.com/matrix-org/synapse/issues/15266))
+- Reorganize URL preview code. ([\#15269](https://github.com/matrix-org/synapse/issues/15269))
+- Clean-up direct TCP replication code. ([\#15272](https://github.com/matrix-org/synapse/issues/15272), [\#15274](https://github.com/matrix-org/synapse/issues/15274))
+- Make `configure_workers_and_start` script used in Complement tests compatible with older versions of Python. ([\#15275](https://github.com/matrix-org/synapse/issues/15275))
+- Add a `/versions` flag for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952). ([\#15293](https://github.com/matrix-org/synapse/issues/15293))
+- Bump hiredis from 2.2.1 to 2.2.2. ([\#15252](https://github.com/matrix-org/synapse/issues/15252))
+- Bump serde from 1.0.152 to 1.0.155. ([\#15253](https://github.com/matrix-org/synapse/issues/15253))
+- Bump pysaml2 from 7.2.1 to 7.3.1. ([\#15254](https://github.com/matrix-org/synapse/issues/15254))
+- Bump msgpack from 1.0.4 to 1.0.5. ([\#15255](https://github.com/matrix-org/synapse/issues/15255))
+- Bump gitpython from 3.1.30 to 3.1.31. ([\#15256](https://github.com/matrix-org/synapse/issues/15256))
+- Bump cryptography from 39.0.1 to 39.0.2. ([\#15257](https://github.com/matrix-org/synapse/issues/15257))
+- Bump pydantic from 1.10.4 to 1.10.6. ([\#15286](https://github.com/matrix-org/synapse/issues/15286))
+- Bump serde from 1.0.155 to 1.0.157. ([\#15287](https://github.com/matrix-org/synapse/issues/15287))
+- Bump anyhow from 1.0.69 to 1.0.70. ([\#15288](https://github.com/matrix-org/synapse/issues/15288))
+- Bump txredisapi from 1.4.7 to 1.4.9. ([\#15289](https://github.com/matrix-org/synapse/issues/15289))
+- Bump pygithub from 1.57 to 1.58.1. ([\#15290](https://github.com/matrix-org/synapse/issues/15290))
+- Bump types-requests from 2.28.11.12 to 2.28.11.15. ([\#15291](https://github.com/matrix-org/synapse/issues/15291))
+
+
+
+Synapse 1.79.0 (2023-03-14)
+===========================
+
+No significant changes since 1.79.0rc2.
+
+
+Synapse 1.79.0rc2 (2023-03-13)
+==============================
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.79.0rc1 where attempting to register a `on_remove_user_third_party_identifier` module API callback would be a no-op. ([\#15227](https://github.com/matrix-org/synapse/issues/15227))
+- Fix a rare bug introduced in Synapse 1.73 where events could remain unsent to other homeservers after a faster-join to a room. ([\#15248](https://github.com/matrix-org/synapse/issues/15248))
+
+
+Internal Changes
+----------------
+
+- Refactor `filter_events_for_server`. ([\#15240](https://github.com/matrix-org/synapse/issues/15240))
+
+
+Synapse 1.79.0rc1 (2023-03-07)
+==============================
+
+Features
+--------
+
+- Add two new Third Party Rules module API callbacks: [`on_add_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_add_user_third_party_identifier) and [`on_remove_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_remove_user_third_party_identifier). ([\#15044](https://github.com/matrix-org/synapse/issues/15044))
+- Experimental support for [MSC3967](https://github.com/matrix-org/matrix-spec-proposals/pull/3967) to not require UIA for setting up cross-signing on first use. ([\#15077](https://github.com/matrix-org/synapse/issues/15077))
+- Add media information to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.79/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#15107](https://github.com/matrix-org/synapse/issues/15107))
+- Add an [admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) to delete a [specific event report](https://spec.matrix.org/v1.6/client-server-api/#reporting-content). ([\#15116](https://github.com/matrix-org/synapse/issues/15116))
+- Add support for knocking to workers. ([\#15133](https://github.com/matrix-org/synapse/issues/15133))
+- Allow use of the `/filter` Client-Server APIs on workers. ([\#15134](https://github.com/matrix-org/synapse/issues/15134))
+- Update support for [MSC2677](https://github.com/matrix-org/matrix-spec-proposals/pull/2677): remove support for server-side aggregation of reactions. ([\#15172](https://github.com/matrix-org/synapse/issues/15172))
+- Stabilise support for [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758): `event_property_is` push condition. ([\#15185](https://github.com/matrix-org/synapse/issues/15185))
+
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.75 that caused experimental support for deleting account data to raise an internal server error while using an account data writer worker. ([\#14869](https://github.com/matrix-org/synapse/issues/14869))
+- Fix a long-standing bug where Synapse handled an unspecced field on push rules. ([\#15088](https://github.com/matrix-org/synapse/issues/15088))
+- Fix a long-standing bug where a URL preview would break if the discovered oEmbed failed to download. ([\#15092](https://github.com/matrix-org/synapse/issues/15092))
+- Fix a long-standing bug where an initial sync would not respond to changes to the list of ignored users if there was an initial sync cached. ([\#15163](https://github.com/matrix-org/synapse/issues/15163))
+- Add the `transaction_id` in the events included in many endpoints' responses. ([\#15174](https://github.com/matrix-org/synapse/issues/15174))
+- Fix a bug introduced in Synapse 1.78.0 where requests to claim dehydrated devices would fail with a `405` error. ([\#15180](https://github.com/matrix-org/synapse/issues/15180))
+- Stop applying edits when bundling aggregations, per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925). ([\#15193](https://github.com/matrix-org/synapse/issues/15193))
+- Fix a long-standing bug where the user directory search was not case-insensitive for accented characters. ([\#15143](https://github.com/matrix-org/synapse/issues/15143))
+
+
+Updates to the Docker image
+---------------------------
+
+- Improve startup logging in the with-workers Docker image. ([\#15186](https://github.com/matrix-org/synapse/issues/15186))
+
+
+Improved Documentation
+----------------------
+
+- Document how to use caches in a module. ([\#14026](https://github.com/matrix-org/synapse/issues/14026))
+- Clarify which worker processes the ThirdPartyRules' [`on_new_event`](https://matrix-org.github.io/synapse/v1.78/modules/third_party_rules_callbacks.html#on_new_event) module API callback runs on. ([\#15071](https://github.com/matrix-org/synapse/issues/15071))
+- Document using [Shibboleth](https://www.shibboleth.net/) as an OpenID Provider. ([\#15112](https://github.com/matrix-org/synapse/issues/15112))
+- Correct reference to `federation_verify_certificates` in configuration documentation. ([\#15139](https://github.com/matrix-org/synapse/issues/15139))
+- Correct small documentation errors in some `MatrixFederationHttpClient` methods. ([\#15148](https://github.com/matrix-org/synapse/issues/15148))
+- Correct the description of the behavior of `registration_shared_secret_path` on startup. ([\#15168](https://github.com/matrix-org/synapse/issues/15168))
+
+
+Deprecations and Removals
+-------------------------
+
+- Deprecate the `on_threepid_bind` module callback, to be replaced by [`on_add_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_add_user_third_party_identifier). See [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.79/docs/upgrade.md#upgrading-to-v1790). ([\#15044](https://github.com/matrix-org/synapse/issues/15044))
+- Remove the unspecced `room_alias` field from the [`/createRoom`](https://spec.matrix.org/v1.6/client-server-api/#post_matrixclientv3createroom) response. ([\#15093](https://github.com/matrix-org/synapse/issues/15093))
+- Remove the unspecced `PUT` on the `/knock/{roomIdOrAlias}` endpoint. ([\#15189](https://github.com/matrix-org/synapse/issues/15189))
+- Remove the undocumented and unspecced `type` parameter to the `/thumbnail` endpoint. ([\#15137](https://github.com/matrix-org/synapse/issues/15137))
+- Remove unspecced and buggy `PUT` method on the unstable `/rooms/<room_id>/batch_send` endpoint. ([\#15199](https://github.com/matrix-org/synapse/issues/15199))
+
+
+Internal Changes
+----------------
+
+- Run the integration test suites with the asyncio reactor enabled in CI. ([\#14101](https://github.com/matrix-org/synapse/issues/14101))
+- Batch up storing state groups when creating a new room. ([\#14918](https://github.com/matrix-org/synapse/issues/14918))
+- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15051](https://github.com/matrix-org/synapse/issues/15051))
+- Refactor writing json data in `FileExfiltrationWriter`. ([\#15095](https://github.com/matrix-org/synapse/issues/15095))
+- Tighten the login ratelimit defaults. ([\#15135](https://github.com/matrix-org/synapse/issues/15135))
+- Fix a typo in an experimental config setting. ([\#15138](https://github.com/matrix-org/synapse/issues/15138))
+- Refactor the media modules. ([\#15146](https://github.com/matrix-org/synapse/issues/15146), [\#15175](https://github.com/matrix-org/synapse/issues/15175))
+- Improve type hints. ([\#15164](https://github.com/matrix-org/synapse/issues/15164))
+- Move `get_event_report` and `get_event_reports_paginate` from `RoomStore` to `RoomWorkerStore`. ([\#15165](https://github.com/matrix-org/synapse/issues/15165))
+- Remove dangling reference to being a reference implementation in docstring. ([\#15167](https://github.com/matrix-org/synapse/issues/15167))
+- Add an option to force a rebuild of the "editable" complement image. ([\#15184](https://github.com/matrix-org/synapse/issues/15184))
+- Use nightly rustfmt in CI. ([\#15188](https://github.com/matrix-org/synapse/issues/15188))
+- Add a `get_next_txn` method to `StreamIdGenerator` to match `MultiWriterIdGenerator`. ([\#15191](https://github.com/matrix-org/synapse/issues/15191))
+- Combine `AbstractStreamIdTracker` and `AbstractStreamIdGenerator`. ([\#15192](https://github.com/matrix-org/synapse/issues/15192))
+- Automatically fix errors with `ruff`. ([\#15194](https://github.com/matrix-org/synapse/issues/15194))
+- Refactor database transaction for query users' devices to reduce database pool contention. ([\#15215](https://github.com/matrix-org/synapse/issues/15215))
+- Correct `test_icu_word_boundary_punctuation` so that it passes with the ICU versions available in Alpine and macOS. ([\#15177](https://github.com/matrix-org/synapse/issues/15177))
+
+<details><summary>Locked dependency updates</summary>
+
+  - Bump actions/checkout from 2 to 3. ([\#15155](https://github.com/matrix-org/synapse/issues/15155))
+  - Bump black from 22.12.0 to 23.1.0. ([\#15103](https://github.com/matrix-org/synapse/issues/15103))
+  - Bump dawidd6/action-download-artifact from 2.25.0 to 2.26.0. ([\#15152](https://github.com/matrix-org/synapse/issues/15152))
+  - Bump docker/login-action from 1 to 2. ([\#15154](https://github.com/matrix-org/synapse/issues/15154))
+  - Bump matrix-org/backend-meta from 1 to 2. ([\#15156](https://github.com/matrix-org/synapse/issues/15156))
+  - Bump ruff from 0.0.237 to 0.0.252. ([\#15159](https://github.com/matrix-org/synapse/issues/15159))
+  - Bump serde_json from 1.0.93 to 1.0.94. ([\#15214](https://github.com/matrix-org/synapse/issues/15214))
+  - Bump types-commonmark from 0.9.2.1 to 0.9.2.2. ([\#15209](https://github.com/matrix-org/synapse/issues/15209))
+  - Bump types-opentracing from 2.4.10.1 to 2.4.10.3. ([\#15158](https://github.com/matrix-org/synapse/issues/15158))
+  - Bump types-pillow from 9.4.0.13 to 9.4.0.17. ([\#15211](https://github.com/matrix-org/synapse/issues/15211))
+  - Bump types-psycopg2 from 2.9.21.4 to 2.9.21.8. ([\#15210](https://github.com/matrix-org/synapse/issues/15210))
+  - Bump types-pyopenssl from 22.1.0.2 to 23.0.0.4. ([\#15213](https://github.com/matrix-org/synapse/issues/15213))
+  - Bump types-setuptools from 67.3.0.1 to 67.4.0.3. ([\#15160](https://github.com/matrix-org/synapse/issues/15160))
+  - Bump types-setuptools from 67.4.0.3 to 67.5.0.0. ([\#15212](https://github.com/matrix-org/synapse/issues/15212))
+  - Bump typing-extensions from 4.4.0 to 4.5.0. ([\#15157](https://github.com/matrix-org/synapse/issues/15157))
+</details>
+
+
+Synapse 1.78.0 (2023-02-28)
+===========================
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.76 where 5s delays would occasionally occur in deployments using workers. ([\#15150](https://github.com/matrix-org/synapse/issues/15150))
+
+
+Synapse 1.78.0rc1 (2023-02-21)
+==============================
+
+Features
+--------
+
+- Implement the experimental `exact_event_match` push rule condition from [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758). ([\#14964](https://github.com/matrix-org/synapse/issues/14964))
+- Add account data to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.78/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14969](https://github.com/matrix-org/synapse/issues/14969))
+- Implement [MSC3873](https://github.com/matrix-org/matrix-spec-proposals/pull/3873) to disambiguate push rule keys with dots in them. ([\#15004](https://github.com/matrix-org/synapse/issues/15004))
+- Allow Synapse to use a specific Redis [logical database](https://redis.io/commands/select/) in worker-mode deployments. ([\#15034](https://github.com/matrix-org/synapse/issues/15034))
+- Tag opentracing spans for federation requests with the name of the worker serving the request. ([\#15042](https://github.com/matrix-org/synapse/issues/15042))
+- Implement the experimental `exact_event_property_contains` push rule condition from [MSC3966](https://github.com/matrix-org/matrix-spec-proposals/pull/3966). ([\#15045](https://github.com/matrix-org/synapse/issues/15045))
+- Remove spurious `dont_notify` action from the defaults for the `.m.rule.reaction` pushrule. ([\#15073](https://github.com/matrix-org/synapse/issues/15073))
+- Update the error code returned when user sends a duplicate annotation. ([\#15075](https://github.com/matrix-org/synapse/issues/15075))
+
+
+Bugfixes
+--------
+
+- Prevent clients from reporting nonexistent events. ([\#13779](https://github.com/matrix-org/synapse/issues/13779))
+- Return spec-compliant JSON errors when unknown endpoints are requested. ([\#14605](https://github.com/matrix-org/synapse/issues/14605))
+- Fix a long-standing bug where the room aliases returned could be corrupted. ([\#15038](https://github.com/matrix-org/synapse/issues/15038))
+- Fix a bug introduced in Synapse 1.76.0 where partially-joined rooms could not be deleted using the [purge room API](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#delete-room-api). ([\#15068](https://github.com/matrix-org/synapse/issues/15068))
+- Fix a long-standing bug where federated joins would fail if the first server in the list of servers to try is not in the room. ([\#15074](https://github.com/matrix-org/synapse/issues/15074))
+- Fix a bug introduced in Synapse v1.74.0 where searching with colons when using ICU for search term tokenisation would fail with an error. ([\#15079](https://github.com/matrix-org/synapse/issues/15079))
+- Reduce the likelihood of a rare race condition where rejoining a restricted room over federation would fail. ([\#15080](https://github.com/matrix-org/synapse/issues/15080))
+- Fix a bug introduced in Synapse 1.76 where workers would fail to start if the `health` listener was configured. ([\#15096](https://github.com/matrix-org/synapse/issues/15096))
+- Fix a bug introduced in Synapse 1.75 where the [portdb script](https://matrix-org.github.io/synapse/release-v1.78/postgres.html#porting-from-sqlite) would fail to run after a room had been faster-joined. ([\#15108](https://github.com/matrix-org/synapse/issues/15108))
+
+
+Improved Documentation
+----------------------
+
+- Document how to start Synapse with Poetry. Contributed by @thezaidbintariq. ([\#14892](https://github.com/matrix-org/synapse/issues/14892), [\#15022](https://github.com/matrix-org/synapse/issues/15022))
+- Update delegation documentation to clarify that SRV DNS delegation does not eliminate all needs to serve files from .well-known locations. Contributed by @williamkray. ([\#14959](https://github.com/matrix-org/synapse/issues/14959))
+- Fix a mistake in registration_shared_secret_path docs. ([\#15078](https://github.com/matrix-org/synapse/issues/15078))
+- Refer to a more recent blog post on the [Database Maintenance Tools](https://matrix-org.github.io/synapse/latest/usage/administration/database_maintenance_tools.html) page. Contributed by @jahway603. ([\#15083](https://github.com/matrix-org/synapse/issues/15083))
+
+
+Internal Changes
+----------------
+
+- Re-type hint some collections as read-only. ([\#13755](https://github.com/matrix-org/synapse/issues/13755))
+- Faster joins: don't stall when another user joins during a partial-state room resync. ([\#14606](https://github.com/matrix-org/synapse/issues/14606))
+- Add a class `UnpersistedEventContext` to allow for the batching up of storing state groups. ([\#14675](https://github.com/matrix-org/synapse/issues/14675))
+- Add a check to ensure that locked dependencies have source distributions available. ([\#14742](https://github.com/matrix-org/synapse/issues/14742))
+- Tweak comment on `_is_local_room_accessible` as part of room visibility in `/hierarchy` to clarify the condition for a room being visible. ([\#14834](https://github.com/matrix-org/synapse/issues/14834))
+- Prevent `WARNING: there is already a transaction in progress` lines appearing in PostgreSQL's logs on some occasions. ([\#14840](https://github.com/matrix-org/synapse/issues/14840))
+- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14929](https://github.com/matrix-org/synapse/issues/14929))
+- Improve performance of `/sync` in a few situations. ([\#14973](https://github.com/matrix-org/synapse/issues/14973))
+- Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room. ([\#14977](https://github.com/matrix-org/synapse/issues/14977))
+- Skip calculating unread push actions in /sync when enable_push is false. ([\#14980](https://github.com/matrix-org/synapse/issues/14980))
+- Add a schema dump symlinks inside `contrib`, to make it easier for IDEs to interrogate Synapse's database schema. ([\#14982](https://github.com/matrix-org/synapse/issues/14982))
+- Improve type hints. ([\#15008](https://github.com/matrix-org/synapse/issues/15008), [\#15026](https://github.com/matrix-org/synapse/issues/15026), [\#15027](https://github.com/matrix-org/synapse/issues/15027), [\#15028](https://github.com/matrix-org/synapse/issues/15028), [\#15031](https://github.com/matrix-org/synapse/issues/15031), [\#15035](https://github.com/matrix-org/synapse/issues/15035), [\#15052](https://github.com/matrix-org/synapse/issues/15052), [\#15072](https://github.com/matrix-org/synapse/issues/15072), [\#15084](https://github.com/matrix-org/synapse/issues/15084))
+- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15037](https://github.com/matrix-org/synapse/issues/15037))
+- Avoid mutating a cached value in `get_user_devices_from_cache`. ([\#15040](https://github.com/matrix-org/synapse/issues/15040))
+- Fix a rare exception in logs on start up. ([\#15041](https://github.com/matrix-org/synapse/issues/15041))
+- Update pyo3-log to v0.8.1. ([\#15043](https://github.com/matrix-org/synapse/issues/15043))
+- Avoid mutating cached values in `_generate_sync_entry_for_account_data`. ([\#15047](https://github.com/matrix-org/synapse/issues/15047))
+- Refactor arguments of `try_unbind_threepid` and `_try_unbind_threepid_with_id_server` to not use dictionaries. ([\#15053](https://github.com/matrix-org/synapse/issues/15053))
+- Merge debug logging from the hotfixes branch. ([\#15054](https://github.com/matrix-org/synapse/issues/15054))
+- Faster joins: omit device list updates originating from partial state rooms in /sync responses without lazy loading of members enabled. ([\#15069](https://github.com/matrix-org/synapse/issues/15069))
+- Fix clashing database transaction name. ([\#15070](https://github.com/matrix-org/synapse/issues/15070))
+- Upper-bound frozendict dependency. This works around us being unable to test installing our wheels against Python 3.11 in CI. ([\#15114](https://github.com/matrix-org/synapse/issues/15114))
+- Tweak logging for when a worker waits for its view of a replication stream to catch up. ([\#15120](https://github.com/matrix-org/synapse/issues/15120))
+
+<details><summary>Locked dependency updates</summary>
+
+- Bump bleach from 5.0.1 to 6.0.0. ([\#15059](https://github.com/matrix-org/synapse/issues/15059))
+- Bump cryptography from 38.0.4 to 39.0.1. ([\#15020](https://github.com/matrix-org/synapse/issues/15020))
+- Bump ruff version from 0.0.230 to 0.0.237. ([\#15033](https://github.com/matrix-org/synapse/issues/15033))
+- Bump dtolnay/rust-toolchain from 9cd00a88a73addc8617065438eff914dd08d0955 to 25dc93b901a87e864900a8aec6c12e9aa794c0c3. ([\#15060](https://github.com/matrix-org/synapse/issues/15060))
+- Bump systemd-python from 234 to 235. ([\#15061](https://github.com/matrix-org/synapse/issues/15061))
+- Bump serde_json from 1.0.92 to 1.0.93. ([\#15062](https://github.com/matrix-org/synapse/issues/15062))
+- Bump types-requests from 2.28.11.8 to 2.28.11.12. ([\#15063](https://github.com/matrix-org/synapse/issues/15063))
+- Bump types-pillow from 9.4.0.5 to 9.4.0.10. ([\#15064](https://github.com/matrix-org/synapse/issues/15064))
+- Bump sentry-sdk from 1.13.0 to 1.15.0. ([\#15065](https://github.com/matrix-org/synapse/issues/15065))
+- Bump types-jsonschema from 4.17.0.3 to 4.17.0.5. ([\#15099](https://github.com/matrix-org/synapse/issues/15099))
+- Bump types-bleach from 5.0.3.1 to 6.0.0.0. ([\#15100](https://github.com/matrix-org/synapse/issues/15100))
+- Bump dtolnay/rust-toolchain from 25dc93b901a87e864900a8aec6c12e9aa794c0c3 to e12eda571dc9a5ee5d58eecf4738ec291c66f295. ([\#15101](https://github.com/matrix-org/synapse/issues/15101))
+- Bump dawidd6/action-download-artifact from 2.24.3 to 2.25.0. ([\#15102](https://github.com/matrix-org/synapse/issues/15102))
+- Bump types-pillow from 9.4.0.10 to 9.4.0.13. ([\#15104](https://github.com/matrix-org/synapse/issues/15104))
+- Bump types-setuptools from 67.1.0.0 to 67.3.0.1. ([\#15105](https://github.com/matrix-org/synapse/issues/15105))
+
+
+</details>
+
+
+Synapse 1.77.0 (2023-02-14)
+===========================
+
+No significant changes since 1.77.0rc2.
+
+
+Synapse 1.77.0rc2 (2023-02-10)
+==============================
+
+Bugfixes
+--------
+
+- Fix bug where retried replication requests would return a failure. Introduced in v1.76.0. ([\#15024](https://github.com/matrix-org/synapse/issues/15024))
+
+
+Internal Changes
+----------------
+
+- Prepare for future database schema changes. ([\#15036](https://github.com/matrix-org/synapse/issues/15036))
+
+
+Synapse 1.77.0rc1 (2023-02-07)
+==============================
+
+Features
+--------
+
+- Experimental support for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952): intentional mentions. ([\#14823](https://github.com/matrix-org/synapse/issues/14823), [\#14943](https://github.com/matrix-org/synapse/issues/14943), [\#14957](https://github.com/matrix-org/synapse/issues/14957), [\#14958](https://github.com/matrix-org/synapse/issues/14958))
+- Experimental support to suppress notifications from message edits ([MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958)). ([\#14960](https://github.com/matrix-org/synapse/issues/14960), [\#15016](https://github.com/matrix-org/synapse/issues/15016))
+- Add profile information, devices and connections to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.77/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14894](https://github.com/matrix-org/synapse/issues/14894))
+- Improve performance when joining or sending an event in large rooms. ([\#14962](https://github.com/matrix-org/synapse/issues/14962))
+- Improve performance of joining and leaving large rooms with many local users. ([\#14971](https://github.com/matrix-org/synapse/issues/14971))
+
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.53.0 where `next_batch` tokens from `/sync` could not be used with the `/relations` endpoint. ([\#14866](https://github.com/matrix-org/synapse/issues/14866))
+- Fix a bug introduced in Synapse 1.35.0 where the module API's `send_local_online_presence_to` would fail to send presence updates over federation. ([\#14880](https://github.com/matrix-org/synapse/issues/14880))
+- Fix a bug introduced in Synapse 1.70.0 where the background updates to add non-thread unique indexes on receipts could fail when upgrading from 1.67.0 or earlier. ([\#14915](https://github.com/matrix-org/synapse/issues/14915))
+- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14926](https://github.com/matrix-org/synapse/issues/14926))
+- Fix a bug introduced in Synapse 1.68.0 where we were unable to service remote joins in rooms with `@room` notification levels set to `null` in their (malformed) power levels. ([\#14942](https://github.com/matrix-org/synapse/issues/14942))
+- Fix a bug introduced in Synapse 1.64.0 where boolean power levels were erroneously permitted in [v10 rooms](https://spec.matrix.org/v1.5/rooms/v10/). ([\#14944](https://github.com/matrix-org/synapse/issues/14944))
+- Fix a long-standing bug where sending messages on servers with presence enabled would spam "Re-starting finished log context" log lines. ([\#14947](https://github.com/matrix-org/synapse/issues/14947))
+- Fix a bug introduced in Synapse 1.68.0 where logging from the Rust module was not properly logged. ([\#14976](https://github.com/matrix-org/synapse/issues/14976))
+- Fix various long-standing bugs in Synapse's config, event and request handling where booleans were unintentionally accepted where an integer was expected. ([\#14945](https://github.com/matrix-org/synapse/issues/14945))
+
+
+Internal Changes
+----------------
+
+- Add missing type hints. ([\#14879](https://github.com/matrix-org/synapse/issues/14879), [\#14886](https://github.com/matrix-org/synapse/issues/14886), [\#14887](https://github.com/matrix-org/synapse/issues/14887), [\#14904](https://github.com/matrix-org/synapse/issues/14904), [\#14927](https://github.com/matrix-org/synapse/issues/14927), [\#14956](https://github.com/matrix-org/synapse/issues/14956), [\#14983](https://github.com/matrix-org/synapse/issues/14983), [\#14984](https://github.com/matrix-org/synapse/issues/14984), [\#14985](https://github.com/matrix-org/synapse/issues/14985), [\#14987](https://github.com/matrix-org/synapse/issues/14987), [\#14988](https://github.com/matrix-org/synapse/issues/14988), [\#14990](https://github.com/matrix-org/synapse/issues/14990), [\#14991](https://github.com/matrix-org/synapse/issues/14991), [\#14992](https://github.com/matrix-org/synapse/issues/14992), [\#15007](https://github.com/matrix-org/synapse/issues/15007))
+- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14922](https://github.com/matrix-org/synapse/issues/14922))
+- Allow running the complement tests suites with the asyncio reactor enabled. ([\#14858](https://github.com/matrix-org/synapse/issues/14858))
+- Improve performance of `/sync` in a few situations. ([\#14908](https://github.com/matrix-org/synapse/issues/14908), [\#14970](https://github.com/matrix-org/synapse/issues/14970))
+- Document how to handle Dependabot pull requests. ([\#14916](https://github.com/matrix-org/synapse/issues/14916))
+- Fix typo in release script. ([\#14920](https://github.com/matrix-org/synapse/issues/14920))
+- Update build system requirements to allow building with poetry-core 1.5.0. ([\#14949](https://github.com/matrix-org/synapse/issues/14949), [\#15019](https://github.com/matrix-org/synapse/issues/15019))
+- Add an [lnav](https://lnav.org) config file for Synapse logs to `/contrib/lnav`. ([\#14953](https://github.com/matrix-org/synapse/issues/14953))
+- Faster joins: Refactor internal handling of servers in room to never store an empty list. ([\#14954](https://github.com/matrix-org/synapse/issues/14954))
+- Faster joins: tag `v2/send_join/` requests to indicate if they served a partial join response. ([\#14950](https://github.com/matrix-org/synapse/issues/14950))
+- Allow running `cargo` without the `extension-module` option. ([\#14965](https://github.com/matrix-org/synapse/issues/14965))
+- Preparatory work for adding a denormalised event stream ordering column in the future. Contributed by Nick @ Beeper (@fizzadar). ([\#14979](https://github.com/matrix-org/synapse/issues/14979), [9cd7610](https://github.com/matrix-org/synapse/commit/9cd7610f86ab5051c9365dd38d1eec405a5f8ca6), [f10caa7](https://github.com/matrix-org/synapse/commit/f10caa73eee0caa91cf373966104d1ededae2aee); see [\#15014](https://github.com/matrix-org/synapse/issues/15014))
+- Add tests for `_flatten_dict`. ([\#14981](https://github.com/matrix-org/synapse/issues/14981), [\#15002](https://github.com/matrix-org/synapse/issues/15002))
+
+<details><summary>Locked dependency updates</summary>
+
+- Bump dtolnay/rust-toolchain from e645b0cf01249a964ec099494d38d2da0f0b349f to 9cd00a88a73addc8617065438eff914dd08d0955. ([\#14968](https://github.com/matrix-org/synapse/issues/14968))
+- Bump docker/build-push-action from 3 to 4. ([\#14952](https://github.com/matrix-org/synapse/issues/14952))
+- Bump ijson from 3.1.4 to 3.2.0.post0. ([\#14935](https://github.com/matrix-org/synapse/issues/14935))
+- Bump types-pyyaml from 6.0.12.2 to 6.0.12.3. ([\#14936](https://github.com/matrix-org/synapse/issues/14936))
+- Bump types-jsonschema from 4.17.0.2 to 4.17.0.3. ([\#14937](https://github.com/matrix-org/synapse/issues/14937))
+- Bump types-pillow from 9.4.0.3 to 9.4.0.5. ([\#14938](https://github.com/matrix-org/synapse/issues/14938))
+- Bump hiredis from 2.0.0 to 2.1.1. ([\#14939](https://github.com/matrix-org/synapse/issues/14939))
+- Bump hiredis from 2.1.1 to 2.2.1. ([\#14993](https://github.com/matrix-org/synapse/issues/14993))
+- Bump types-setuptools from 65.6.0.3 to 67.1.0.0. ([\#14994](https://github.com/matrix-org/synapse/issues/14994))
+- Bump prometheus-client from 0.15.0 to 0.16.0. ([\#14995](https://github.com/matrix-org/synapse/issues/14995))
+- Bump anyhow from 1.0.68 to 1.0.69. ([\#14996](https://github.com/matrix-org/synapse/issues/14996))
+- Bump serde_json from 1.0.91 to 1.0.92. ([\#14997](https://github.com/matrix-org/synapse/issues/14997))
+- Bump isort from 5.11.4 to 5.11.5. ([\#14998](https://github.com/matrix-org/synapse/issues/14998))
+- Bump phonenumbers from 8.13.4 to 8.13.5. ([\#14999](https://github.com/matrix-org/synapse/issues/14999))
+</details>
+
+Synapse 1.76.0 (2023-01-31)
+===========================
+
+The 1.76 release is the first to enable faster joins ([MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706) and [MSC3902](https://github.com/matrix-org/matrix-spec-proposals/pull/3902)) by default. Admins can opt-out: see [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#faster-joins-are-enabled-by-default) for more details.
+
+The upgrade from 1.75 to 1.76 changes the account data replication streams in a backwards-incompatible manner. Server operators running a multi-worker deployment should consult [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#changes-to-the-account-data-replication-streams).
+
+Those who are `poetry install`ing from source using our lockfile should ensure their poetry version is 1.3.2 or higher; [see upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#minimum-version-of-poetry-is-now-132).
+
+
+Notes on faster joins
+---------------------
+
+The faster joins project sees the most benefit when joining a room with a large number of members (joined or historical). We expect it to be particularly useful for joining large public rooms like the [Matrix HQ](https://matrix.to/#/#matrix:matrix.org) or [Synapse Admins](https://matrix.to/#/#synapse:matrix.org) rooms.
+
+After a faster join, Synapse considers that room "partially joined". In this state, you should be able to
+
+- read incoming messages;
+- see incoming state changes, e.g. room topic changes; and
+- send messages, if the room is unencrypted.
+
+Synapse has to spend more effort to complete the join in the background. Once this finishes, you will be able to
+
+- send messages, if the room is in encrypted;
+- retrieve room history from before your join, if permitted by the room settings; and
+- access the full list of room members.
+
+
+Improved Documentation
+----------------------
+
+- Describe the ideas and the internal machinery behind faster joins. ([\#14677](https://github.com/matrix-org/synapse/issues/14677))
+
+
+Synapse 1.76.0rc2 (2023-01-27)
+==============================
+
+Bugfixes
+--------
+
+- Faster joins: Fix a bug introduced in Synapse 1.69 where device list EDUs could fail to be handled after a restart when a faster join sync is in progress. ([\#14914](https://github.com/matrix-org/synapse/issues/14914))
+
+
+Internal Changes
+----------------
+
+- Faster joins: Improve performance of looking up partial-state status of rooms. ([\#14917](https://github.com/matrix-org/synapse/issues/14917))
+
+
+Synapse 1.76.0rc1 (2023-01-25)
+==============================
+
+Features
+--------
+
+- Update the default room version to [v10](https://spec.matrix.org/v1.5/rooms/v10/) ([MSC 3904](https://github.com/matrix-org/matrix-spec-proposals/pull/3904)). Contributed by @FSG-Cat. ([\#14111](https://github.com/matrix-org/synapse/issues/14111))
+- Add a `set_displayname()` method to the module API for setting a user's display name. ([\#14629](https://github.com/matrix-org/synapse/issues/14629))
+- Add a dedicated listener configuration for `health` endpoint. ([\#14747](https://github.com/matrix-org/synapse/issues/14747))
+- Implement support for [MSC3890](https://github.com/matrix-org/matrix-spec-proposals/pull/3890): Remotely silence local notifications. ([\#14775](https://github.com/matrix-org/synapse/issues/14775))
+- Implement experimental support for [MSC3930](https://github.com/matrix-org/matrix-spec-proposals/pull/3930): Push rules for ([MSC3381](https://github.com/matrix-org/matrix-spec-proposals/pull/3381)) Polls. ([\#14787](https://github.com/matrix-org/synapse/issues/14787))
+- Per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925), bundle the whole of the replacement with any edited events, and optionally inhibit server-side replacement. ([\#14811](https://github.com/matrix-org/synapse/issues/14811))
+- Faster joins: always serve a partial join response to servers that request it with the stable query param. ([\#14839](https://github.com/matrix-org/synapse/issues/14839))
+- Faster joins: allow non-lazy-loading ("eager") syncs to complete after a partial join by omitting partial state rooms until they become fully stated. ([\#14870](https://github.com/matrix-org/synapse/issues/14870))
+- Faster joins: request partial joins by default. Admins can opt-out of this for the time being---see the upgrade notes. ([\#14905](https://github.com/matrix-org/synapse/issues/14905))
+
+
+Bugfixes
+--------
+
+- Add index to improve performance of the `/timestamp_to_event` endpoint used for jumping to a specific date in the timeline of a room. ([\#14799](https://github.com/matrix-org/synapse/issues/14799))
+- Fix a long-standing bug where Synapse would exhaust the stack when processing many federation requests where the remote homeserver has disconencted early. ([\#14812](https://github.com/matrix-org/synapse/issues/14812), [\#14842](https://github.com/matrix-org/synapse/issues/14842))
+- Fix rare races when using workers. ([\#14820](https://github.com/matrix-org/synapse/issues/14820))
+- Fix a bug introduced in Synapse 1.64.0 when using room version 10 with frozen events enabled. ([\#14864](https://github.com/matrix-org/synapse/issues/14864))
+- Fix a long-standing bug where the `populate_room_stats` background job could fail on broken rooms. ([\#14873](https://github.com/matrix-org/synapse/issues/14873))
+- Faster joins: Fix a bug in worker deployments where the room stats and user directory would not get updated when finishing a fast join until another event is sent or received. ([\#14874](https://github.com/matrix-org/synapse/issues/14874))
+- Faster joins: Fix incompatibility with joins into restricted rooms where no local users have the ability to invite. ([\#14882](https://github.com/matrix-org/synapse/issues/14882))
+- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14910](https://github.com/matrix-org/synapse/issues/14910))
+
+
+Updates to the Docker image
+---------------------------
+
+- Bump default Python version in the Dockerfile from 3.9 to 3.11. ([\#14875](https://github.com/matrix-org/synapse/issues/14875))
+
+
+Improved Documentation
+----------------------
+
+- Include `x_forwarded` entry in the HTTP listener example configs and remove the remaining `worker_main_http_uri` entries. ([\#14667](https://github.com/matrix-org/synapse/issues/14667))
+- Remove duplicate commands from the Code Style documentation page; point to the Contributing Guide instead. ([\#14773](https://github.com/matrix-org/synapse/issues/14773))
+- Add missing documentation for `tag` to `listeners` section. ([\#14803](https://github.com/matrix-org/synapse/issues/14803))
+- Updated documentation in configuration manual for `user_directory.search_all_users`. ([\#14818](https://github.com/matrix-org/synapse/issues/14818))
+- Add `worker_manhole` to configuration manual. ([\#14824](https://github.com/matrix-org/synapse/issues/14824))
+- Fix the example config missing the `id` field in [application service documentation](https://matrix-org.github.io/synapse/latest/application_services.html). ([\#14845](https://github.com/matrix-org/synapse/issues/14845))
+- Minor corrections to the logging configuration documentation. ([\#14868](https://github.com/matrix-org/synapse/issues/14868))
+- Document the export user data command. Contributed by @thezaidbintariq. ([\#14883](https://github.com/matrix-org/synapse/issues/14883))
+
+
+Deprecations and Removals
+-------------------------
+
+- Poetry 1.3.2 or higher is now required when `poetry install`ing from source. ([\#14860](https://github.com/matrix-org/synapse/issues/14860))
+
+
+Internal Changes
+----------------
+
+- Faster remote room joins (worker mode): do not populate external hosts-in-room cache when sending events as this requires blocking for full state. ([\#14749](https://github.com/matrix-org/synapse/issues/14749))
+- Enable Complement tests for Faster Remote Room Joins against worker-mode Synapse. ([\#14752](https://github.com/matrix-org/synapse/issues/14752))
+- Add some clarifying comments and refactor a portion of the `Keyring` class for readability. ([\#14804](https://github.com/matrix-org/synapse/issues/14804))
+- Add local poetry config files (`poetry.toml`) to `.gitignore`. ([\#14807](https://github.com/matrix-org/synapse/issues/14807))
+- Add missing type hints. ([\#14816](https://github.com/matrix-org/synapse/issues/14816), [\#14885](https://github.com/matrix-org/synapse/issues/14885), [\#14889](https://github.com/matrix-org/synapse/issues/14889))
+- Refactor push tests. ([\#14819](https://github.com/matrix-org/synapse/issues/14819))
+- Re-enable some linting that was disabled when we switched to ruff. ([\#14821](https://github.com/matrix-org/synapse/issues/14821))
+- Add `cargo fmt` and `cargo clippy` to the lint script. ([\#14822](https://github.com/matrix-org/synapse/issues/14822))
+- Drop unused table `presence`. ([\#14825](https://github.com/matrix-org/synapse/issues/14825))
+- Merge the two account data and the two device list replication streams. ([\#14826](https://github.com/matrix-org/synapse/issues/14826), [\#14833](https://github.com/matrix-org/synapse/issues/14833))
+- Faster joins: use stable identifiers from [MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706). ([\#14832](https://github.com/matrix-org/synapse/issues/14832), [\#14841](https://github.com/matrix-org/synapse/issues/14841))
+- Add a parameter to control whether the federation client performs a partial state join. ([\#14843](https://github.com/matrix-org/synapse/issues/14843))
+- Add check to avoid starting duplicate partial state syncs. ([\#14844](https://github.com/matrix-org/synapse/issues/14844))
+- Add an early return when handling no-op presence updates. ([\#14855](https://github.com/matrix-org/synapse/issues/14855))
+- Fix `wait_for_stream_position` to correctly wait for the right instance to advance its token. ([\#14856](https://github.com/matrix-org/synapse/issues/14856), [\#14872](https://github.com/matrix-org/synapse/issues/14872))
+- Always notify replication when a stream advances automatically. ([\#14877](https://github.com/matrix-org/synapse/issues/14877))
+- Reduce max time we wait for stream positions. ([\#14881](https://github.com/matrix-org/synapse/issues/14881))
+- Faster joins: allow the resync process more time to fetch `/state` ids. ([\#14912](https://github.com/matrix-org/synapse/issues/14912))
+- Bump regex from 1.7.0 to 1.7.1. ([\#14848](https://github.com/matrix-org/synapse/issues/14848))
+- Bump peaceiris/actions-gh-pages from 3.9.1 to 3.9.2. ([\#14861](https://github.com/matrix-org/synapse/issues/14861))
+- Bump ruff from 0.0.215 to 0.0.224. ([\#14862](https://github.com/matrix-org/synapse/issues/14862))
+- Bump types-pillow from 9.4.0.0 to 9.4.0.3. ([\#14863](https://github.com/matrix-org/synapse/issues/14863))
+- Bump types-opentracing from 2.4.10 to 2.4.10.1. ([\#14896](https://github.com/matrix-org/synapse/issues/14896))
+- Bump ruff from 0.0.224 to 0.0.230. ([\#14897](https://github.com/matrix-org/synapse/issues/14897))
+- Bump types-requests from 2.28.11.7 to 2.28.11.8. ([\#14899](https://github.com/matrix-org/synapse/issues/14899))
+- Bump types-psycopg2 from 2.9.21.2 to 2.9.21.4. ([\#14900](https://github.com/matrix-org/synapse/issues/14900))
+- Bump types-commonmark from 0.9.2 to 0.9.2.1. ([\#14901](https://github.com/matrix-org/synapse/issues/14901))
+
+
+Synapse 1.75.0 (2023-01-17)
+===========================
+
+No significant changes since 1.75.0rc2.
+
+
+Synapse 1.75.0rc2 (2023-01-12)
+==============================
+
+Bugfixes
+--------
+
+- Fix a bug introduced in Synapse 1.75.0rc1 where device lists could be miscalculated with some sync filters. ([\#14810](https://github.com/matrix-org/synapse/issues/14810))
+- Fix race where calling `/members` or `/state` with an `at` parameter could fail for newly created rooms, when using multiple workers. ([\#14817](https://github.com/matrix-org/synapse/issues/14817))
+
+
+Synapse 1.75.0rc1 (2023-01-10)
+==============================
+
+Features
+--------
+
+- Add a `cached` function to `synapse.module_api` that returns a decorator to cache return values of functions. ([\#14663](https://github.com/matrix-org/synapse/issues/14663))
+- Add experimental support for [MSC3391](https://github.com/matrix-org/matrix-spec-proposals/pull/3391) (removing account data). ([\#14714](https://github.com/matrix-org/synapse/issues/14714))
+- Support [RFC7636](https://datatracker.ietf.org/doc/html/rfc7636) Proof Key for Code Exchange for OAuth single sign-on. ([\#14750](https://github.com/matrix-org/synapse/issues/14750))
+- Support non-OpenID compliant userinfo claims for subject and picture. ([\#14753](https://github.com/matrix-org/synapse/issues/14753))
+- Improve performance of `/sync` when filtering all rooms, message types, or senders. ([\#14786](https://github.com/matrix-org/synapse/issues/14786))
+- Improve performance of the `/hierarchy` endpoint. ([\#14263](https://github.com/matrix-org/synapse/issues/14263))
+
+
+Bugfixes
+--------
+
+- Fix the *MAU Limits* section of the Grafana dashboard relying on a specific `job` name for the workers of a Synapse deployment. ([\#14644](https://github.com/matrix-org/synapse/issues/14644))
+- Fix a bug introduced in Synapse 1.70.0 which could cause spurious `UNIQUE constraint failed` errors in the `rotate_notifs` background job. ([\#14669](https://github.com/matrix-org/synapse/issues/14669))
+- Ensure stream IDs are always updated after caches get invalidated with workers. Contributed by Nick @ Beeper (@fizzadar). ([\#14723](https://github.com/matrix-org/synapse/issues/14723))
+- Remove the unspecced `device` field from `/pushrules` responses. ([\#14727](https://github.com/matrix-org/synapse/issues/14727))
+- Fix a bug introduced in Synapse 1.73.0 where the `picture_claim` configured under `oidc_providers` was unused (the default value of `"picture"` was used instead). ([\#14751](https://github.com/matrix-org/synapse/issues/14751))
+- Unescape HTML entities in URL preview titles making use of oEmbed responses. ([\#14781](https://github.com/matrix-org/synapse/issues/14781))
+- Disable sending confirmation email when 3pid is disabled. ([\#14725](https://github.com/matrix-org/synapse/issues/14725))
+
+
+Improved Documentation
+----------------------
+
+- Declare support for Python 3.11. ([\#14673](https://github.com/matrix-org/synapse/issues/14673))
+- Fix `target_memory_usage` being used in the description for the actual `cache_autotune` sub-option `target_cache_memory_usage`. ([\#14674](https://github.com/matrix-org/synapse/issues/14674))
+- Move `email` to Server section in config file documentation. ([\#14730](https://github.com/matrix-org/synapse/issues/14730))
+- Fix broken links in the Synapse documentation. ([\#14744](https://github.com/matrix-org/synapse/issues/14744))
+- Add missing worker settings to shared configuration documentation. ([\#14748](https://github.com/matrix-org/synapse/issues/14748))
+- Document using Twitter as a OAuth 2.0 authentication provider. ([\#14778](https://github.com/matrix-org/synapse/issues/14778))
+- Fix Synapse 1.74 upgrade notes to correctly explain how to install pyICU when installing Synapse from PyPI. ([\#14797](https://github.com/matrix-org/synapse/issues/14797))
+- Update link to towncrier in contribution guide. ([\#14801](https://github.com/matrix-org/synapse/issues/14801))
+- Use `htmltest` to check links in the Synapse documentation. ([\#14743](https://github.com/matrix-org/synapse/issues/14743))
+
+
+Internal Changes
+----------------
+
+- Faster remote room joins: stream the un-partial-stating of events over replication. ([\#14545](https://github.com/matrix-org/synapse/issues/14545), [\#14546](https://github.com/matrix-org/synapse/issues/14546))
+- Use [ruff](https://github.com/charliermarsh/ruff/) instead of flake8. ([\#14633](https://github.com/matrix-org/synapse/issues/14633), [\#14741](https://github.com/matrix-org/synapse/issues/14741))
+- Change `handle_new_client_event` signature so that a 429 does not reach clients on `PartialStateConflictError`, and internally retry when needed instead. ([\#14665](https://github.com/matrix-org/synapse/issues/14665))
+- Remove dependency on jQuery on reCAPTCHA page. ([\#14672](https://github.com/matrix-org/synapse/issues/14672))
+- Faster joins: make `compute_state_after_events` consistent with other state-fetching functions that take a `StateFilter`. ([\#14676](https://github.com/matrix-org/synapse/issues/14676))
+- Add missing type hints. ([\#14680](https://github.com/matrix-org/synapse/issues/14680), [\#14681](https://github.com/matrix-org/synapse/issues/14681), [\#14687](https://github.com/matrix-org/synapse/issues/14687))
+- Improve type annotations for the helper methods on a `CachedFunction`. ([\#14685](https://github.com/matrix-org/synapse/issues/14685))
+- Check that the SQLite database file exists before porting to PostgreSQL. ([\#14692](https://github.com/matrix-org/synapse/issues/14692))
+- Add `.direnv/` directory to .gitignore to prevent local state generated by the [direnv](https://direnv.net/) development tool from being committed. ([\#14707](https://github.com/matrix-org/synapse/issues/14707))
+- Batch up replication requests to request the resyncing of remote users's devices. ([\#14716](https://github.com/matrix-org/synapse/issues/14716))
+- If debug logging is enabled, log the `msgid`s of any to-device messages that are returned over `/sync`. ([\#14724](https://github.com/matrix-org/synapse/issues/14724))
+- Change GHA CI job to follow best practices. ([\#14772](https://github.com/matrix-org/synapse/issues/14772))
+- Switch to our fork of `dh-virtualenv` to work around an upstream Python 3.11 incompatibility. ([\#14774](https://github.com/matrix-org/synapse/issues/14774))
+- Skip testing built wheels for PyPy 3.7 on Linux x86_64 as we lack new required dependencies in the build environment. ([\#14802](https://github.com/matrix-org/synapse/issues/14802))
+
+### Dependabot updates
+
+<details>
+
+- Bump JasonEtco/create-an-issue from 2.8.1 to 2.8.2. ([\#14693](https://github.com/matrix-org/synapse/issues/14693))
+- Bump anyhow from 1.0.66 to 1.0.68. ([\#14694](https://github.com/matrix-org/synapse/issues/14694))
+- Bump blake2 from 0.10.5 to 0.10.6. ([\#14695](https://github.com/matrix-org/synapse/issues/14695))
+- Bump serde_json from 1.0.89 to 1.0.91. ([\#14696](https://github.com/matrix-org/synapse/issues/14696))
+- Bump serde from 1.0.150 to 1.0.151. ([\#14697](https://github.com/matrix-org/synapse/issues/14697))
+- Bump lxml from 4.9.1 to 4.9.2. ([\#14698](https://github.com/matrix-org/synapse/issues/14698))
+- Bump types-jsonschema from 4.17.0.1 to 4.17.0.2. ([\#14700](https://github.com/matrix-org/synapse/issues/14700))
+- Bump sentry-sdk from 1.11.1 to 1.12.0. ([\#14701](https://github.com/matrix-org/synapse/issues/14701))
+- Bump types-setuptools from 65.6.0.1 to 65.6.0.2. ([\#14702](https://github.com/matrix-org/synapse/issues/14702))
+- Bump minimum PyYAML to 3.13. ([\#14720](https://github.com/matrix-org/synapse/issues/14720))
+- Bump JasonEtco/create-an-issue from 2.8.2 to 2.9.1. ([\#14731](https://github.com/matrix-org/synapse/issues/14731))
+- Bump towncrier from 22.8.0 to 22.12.0. ([\#14732](https://github.com/matrix-org/synapse/issues/14732))
+- Bump isort from 5.10.1 to 5.11.4. ([\#14733](https://github.com/matrix-org/synapse/issues/14733))
+- Bump attrs from 22.1.0 to 22.2.0. ([\#14734](https://github.com/matrix-org/synapse/issues/14734))
+- Bump black from 22.10.0 to 22.12.0. ([\#14735](https://github.com/matrix-org/synapse/issues/14735))
+- Bump sentry-sdk from 1.12.0 to 1.12.1. ([\#14736](https://github.com/matrix-org/synapse/issues/14736))
+- Bump setuptools from 65.3.0 to 65.5.1. ([\#14738](https://github.com/matrix-org/synapse/issues/14738))
+- Bump serde from 1.0.151 to 1.0.152. ([\#14758](https://github.com/matrix-org/synapse/issues/14758))
+- Bump ruff from 0.0.189 to 0.0.206. ([\#14759](https://github.com/matrix-org/synapse/issues/14759))
+- Bump pydantic from 1.10.2 to 1.10.4. ([\#14760](https://github.com/matrix-org/synapse/issues/14760))
+- Bump gitpython from 3.1.29 to 3.1.30. ([\#14761](https://github.com/matrix-org/synapse/issues/14761))
+- Bump pillow from 9.3.0 to 9.4.0. ([\#14762](https://github.com/matrix-org/synapse/issues/14762))
+- Bump types-requests from 2.28.11.5 to 2.28.11.7. ([\#14763](https://github.com/matrix-org/synapse/issues/14763))
+- Bump dawidd6/action-download-artifact from 2.24.2 to 2.24.3. ([\#14779](https://github.com/matrix-org/synapse/issues/14779))
+- Bump peaceiris/actions-gh-pages from 3.9.0 to 3.9.1. ([\#14791](https://github.com/matrix-org/synapse/issues/14791))
+- Bump types-pillow from 9.3.0.4 to 9.4.0.0. ([\#14792](https://github.com/matrix-org/synapse/issues/14792))
+- Bump pyopenssl from 22.1.0 to 23.0.0. ([\#14793](https://github.com/matrix-org/synapse/issues/14793))
+- Bump types-setuptools from 65.6.0.2 to 65.6.0.3. ([\#14794](https://github.com/matrix-org/synapse/issues/14794))
+- Bump importlib-metadata from 4.2.0 to 6.0.0. ([\#14795](https://github.com/matrix-org/synapse/issues/14795))
+- Bump ruff from 0.0.206 to 0.0.215. ([\#14796](https://github.com/matrix-org/synapse/issues/14796))
+</details>
diff --git a/docs/changelogs/CHANGES-2024.md b/docs/changelogs/CHANGES-2024.md
new file mode 100644
index 0000000000..ee354f1573
--- /dev/null
+++ b/docs/changelogs/CHANGES-2024.md
@@ -0,0 +1,1586 @@
+# Synapse 1.121.1 (2024-12-11)
+
+This release contains a fix for our docker build CI. It is functionally identical to 1.121.0, whose changelog is below.
+
+### Internal Changes
+
+- Downgrade the Ubuntu GHA runner when building docker images. ([\#18026](https://github.com/element-hq/synapse/issues/18026))
+
+
+
+# Synapse 1.121.0 (2024-12-11)
+
+### Internal Changes
+
+- Fix release process to not create duplicate releases. ([\#18025](https://github.com/element-hq/synapse/issues/18025))
+
+
+
+# Synapse 1.121.0rc1 (2024-12-04)
+
+### Features
+
+- Support for [MSC4190](https://github.com/matrix-org/matrix-spec-proposals/pull/4190): device management for Application Services. ([\#17705](https://github.com/element-hq/synapse/issues/17705))
+- Update [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync to include invite, ban, kick, targets when `$LAZY`-loading room members. ([\#17947](https://github.com/element-hq/synapse/issues/17947))
+- Use stable `M_USER_LOCKED` error code for locked accounts, as per [Matrix 1.12](https://spec.matrix.org/v1.12/client-server-api/#account-locking). ([\#17965](https://github.com/element-hq/synapse/issues/17965))
+- [MSC4076](https://github.com/matrix-org/matrix-spec-proposals/pull/4076): Add `disable_badge_count` to pusher configuration. ([\#17975](https://github.com/element-hq/synapse/issues/17975))
+
+### Bugfixes
+
+- Fix long-standing bug where read receipts could get overly delayed being sent over federation. ([\#17933](https://github.com/element-hq/synapse/issues/17933))
+
+### Improved Documentation
+
+- Add OIDC example configuration for Forgejo (fork of Gitea). ([\#17872](https://github.com/element-hq/synapse/issues/17872))
+- Link to element-docker-demo from contrib/docker*. ([\#17953](https://github.com/element-hq/synapse/issues/17953))
+
+### Internal Changes
+
+- [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/pull/4108): Add a `Content-Type` header on the `PUT` response to work around a faulty behavior in some caching reverse proxies. ([\#17253](https://github.com/element-hq/synapse/issues/17253))
+- Fix incorrect comment in new schema delta. ([\#17936](https://github.com/element-hq/synapse/issues/17936))
+- Raise setuptools_rust version cap to 1.10.2. ([\#17944](https://github.com/element-hq/synapse/issues/17944))
+- Enable encrypted appservice related experimental features in the complement docker image. ([\#17945](https://github.com/element-hq/synapse/issues/17945))
+- Return whether the user is suspended when querying the user account in the Admin API. ([\#17952](https://github.com/element-hq/synapse/issues/17952))
+- Fix new scheduled tasks jumping the queue. ([\#17962](https://github.com/element-hq/synapse/issues/17962))
+- Bump pyo3 and dependencies to v0.23.2. ([\#17966](https://github.com/element-hq/synapse/issues/17966))
+- Update setuptools-rust and fix building abi3 wheels in latest version. ([\#17969](https://github.com/element-hq/synapse/issues/17969))
+- Consolidate SSO redirects through `/_matrix/client/v3/login/sso/redirect(/{idpId})`. ([\#17972](https://github.com/element-hq/synapse/issues/17972))
+- Fix Docker and Complement config to be able to use `public_baseurl`. ([\#17986](https://github.com/element-hq/synapse/issues/17986))
+- Fix building wheels for MacOS which was temporarily disabled in Synapse 1.120.2. ([\#17993](https://github.com/element-hq/synapse/issues/17993))
+- Fix release process to not create duplicate releases. ([\#17970](https://github.com/element-hq/synapse/issues/17970), [\#17995](https://github.com/element-hq/synapse/issues/17995))
+
+
+### Updates to locked dependencies
+
+* Bump bytes from 1.8.0 to 1.9.0. ([\#17982](https://github.com/element-hq/synapse/issues/17982))
+* Bump pysaml2 from 7.3.1 to 7.5.0. ([\#17978](https://github.com/element-hq/synapse/issues/17978))
+* Bump serde_json from 1.0.132 to 1.0.133. ([\#17939](https://github.com/element-hq/synapse/issues/17939))
+* Bump tomli from 2.0.2 to 2.1.0. ([\#17959](https://github.com/element-hq/synapse/issues/17959))
+* Bump tomli from 2.1.0 to 2.2.1. ([\#17979](https://github.com/element-hq/synapse/issues/17979))
+* Bump tornado from 6.4.1 to 6.4.2. ([\#17955](https://github.com/element-hq/synapse/issues/17955))
+
+# Synapse 1.120.2 (2024-12-03)
+
+This version has building of wheels for macOS disabled.
+It is functionally identical to 1.120.1, which contains multiple security fixes.
+If you are already using 1.120.1, there is no need to upgrade to this version.
+
+
+
+# Synapse 1.120.1 (2024-12-03)
+
+This patch release fixes multiple security vulnerabilities, some affecting all prior versions of Synapse. Server administrators are encouraged to update Synapse as soon as possible. We are not aware of these vulnerabilities being exploited in the wild.
+
+Administrators who are unable to update Synapse may use the workarounds described in the linked GitHub Security Advisory below.
+
+### Security advisory
+
+The following issues are fixed in 1.120.1.
+
+- [GHSA-rfq8-j7rh-8hf2](https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2) / [CVE-2024-52805](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-52805): **Unsupported content types can lead to memory exhaustion**
+
+  Synapse instances which have a high `max_upload_size` and which don't have a reverse proxy in front of them that would otherwise limit upload size are affected.
+
+  Fixed by [4b7154c58501b4bf5e1c2d6c11ebef96529f2fdf](https://github.com/element-hq/synapse/commit/4b7154c58501b4bf5e1c2d6c11ebef96529f2fdf).
+
+- [GHSA-f3r3-h2mq-hx2h](https://github.com/element-hq/synapse/security/advisories/GHSA-f3r3-h2mq-hx2h) / [CVE-2024-52815](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-52815): **Malicious invites via federation can break a user's sync**
+
+  Fixed by [d82e1ed357b7ee21dff83d06cba7a67840cfd464](https://github.com/element-hq/synapse/commit/d82e1ed357b7ee21dff83d06cba7a67840cfd464).
+
+- [GHSA-vp6v-whfm-rv3g](https://github.com/element-hq/synapse/security/advisories/GHSA-vp6v-whfm-rv3g) / [CVE-2024-53863](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53863): **Synapse can be forced to thumbnail unexpected file formats, invoking potentially untrustworthy decoders**
+
+  Synapse instances can disable dynamic thumbnailing by setting `dynamic_thumbnails` to `false` in the configuration file.
+
+  Fixed by [b64a4e5fbbbf119b6c65aedf0d999b4237d55503](https://github.com/element-hq/synapse/commit/b64a4e5fbbbf119b6c65aedf0d999b4237d55503).
+
+- [GHSA-56w4-5538-8v8h](https://github.com/element-hq/synapse/security/advisories/GHSA-56w4-5538-8v8h) / [CVE-2024-53867](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-53867): **The Sliding Sync feature on Synapse versions between 1.113.0rc1 and 1.120.0 can leak partial room state changes to users no longer in a room**
+
+  Non-state events, like messages, are unaffected.
+
+  Synapse instances can disable the Sliding Sync feature by setting `experimental_features.msc3575_enabled` to `false` in the configuration file.
+
+  Fixed by [4daa533e82f345ce87b9495d31781af570ba3ead](https://github.com/element-hq/synapse/commit/4daa533e82f345ce87b9495d31781af570ba3ead).
+
+See the advisories for more details. If you have any questions, email [security at element.io](mailto:security@element.io).
+
+### Bugfixes
+
+- Fix release process to not create duplicate releases. ([\#17970](https://github.com/element-hq/synapse/issues/17970))
+
+
+
+# Synapse 1.120.0 (2024-11-26)
+
+### Bugfixes
+
+- Fix a bug introduced in Synapse v1.120rc1 which would cause the newly-introduced `delete_old_otks` job to fail in worker-mode deployments. ([\#17960](https://github.com/element-hq/synapse/issues/17960))
+
+
+
+
+# Synapse 1.120.0rc1 (2024-11-20)
+
+This release enables the enforcement of authenticated media by default, with exemptions for media that is already present in the
+homeserver's media store.
+
+Most homeservers operating in the public federation will not be impacted by this change, given that
+the large homeserver `matrix.org` enabled this in September 2024 and therefore most clients and servers
+will already have updated as a result.
+
+Some server administrators may still wish to disable this enforcement for the time being, in the interest of compatibility with older clients
+and older federated homeservers.
+See the [upgrade notes](https://element-hq.github.io/synapse/v1.120/upgrade.html#authenticated-media-is-now-enforced-by-default) for more information.
+
+### Features
+
+- Enforce authenticated media by default. Administrators can revert this by configuring `enable_authenticated_media` to `false`. In a future release of Synapse, this option will be removed and become always-on. ([\#17889](https://github.com/element-hq/synapse/issues/17889))
+- Add a one-off task to delete old One-Time Keys, to guard against us having old OTKs in the database that the client has long forgotten about. ([\#17934](https://github.com/element-hq/synapse/issues/17934))
+
+### Improved Documentation
+
+- Clarify the semantics of the `enable_authenticated_media` configuration option. ([\#17913](https://github.com/element-hq/synapse/issues/17913))
+- Add documentation about backing up Synapse. ([\#17931](https://github.com/element-hq/synapse/issues/17931))
+
+### Deprecations and Removals
+
+- Remove support for [MSC3886: Simple client rendezvous capability](https://github.com/matrix-org/matrix-spec-proposals/pull/3886), which has been superseded by [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/pull/4108) and therefore closed. ([\#17638](https://github.com/element-hq/synapse/issues/17638))
+
+### Internal Changes
+
+- Addressed some typos in docs and returned error message for unknown MXC ID. ([\#17865](https://github.com/element-hq/synapse/issues/17865))
+- Unpin the upload release GHA action. ([\#17923](https://github.com/element-hq/synapse/issues/17923))
+- Bump macOS version used to build wheels during release, as current version used is end-of-life. ([\#17924](https://github.com/element-hq/synapse/issues/17924))
+- Move server event filtering logic to Rust. ([\#17928](https://github.com/element-hq/synapse/issues/17928))
+- Support new package name of PyPI package `python-multipart` 0.0.13 so that distro packagers do not need to work around name conflict with PyPI package `multipart`. ([\#17932](https://github.com/element-hq/synapse/issues/17932))
+- Speed up slow initial sliding syncs on large servers. ([\#17946](https://github.com/element-hq/synapse/issues/17946))
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.92 to 1.0.93. ([\#17920](https://github.com/element-hq/synapse/issues/17920))
+* Bump bleach from 6.1.0 to 6.2.0. ([\#17918](https://github.com/element-hq/synapse/issues/17918))
+* Bump immutabledict from 4.2.0 to 4.2.1. ([\#17941](https://github.com/element-hq/synapse/issues/17941))
+* Bump packaging from 24.1 to 24.2. ([\#17940](https://github.com/element-hq/synapse/issues/17940))
+* Bump phonenumbers from 8.13.49 to 8.13.50. ([\#17942](https://github.com/element-hq/synapse/issues/17942))
+* Bump pygithub from 2.4.0 to 2.5.0. ([\#17917](https://github.com/element-hq/synapse/issues/17917))
+* Bump ruff from 0.7.2 to 0.7.3. ([\#17919](https://github.com/element-hq/synapse/issues/17919))
+* Bump serde from 1.0.214 to 1.0.215. ([\#17938](https://github.com/element-hq/synapse/issues/17938))
+
+# Synapse 1.119.0 (2024-11-13)
+
+No significant changes since 1.119.0rc2.
+
+### Python 3.8 support dropped
+
+Python 3.8 is [end-of-life](https://devguide.python.org/versions/) and is no longer supported by Synapse. The minimum supported Python version is now 3.9.
+
+If you are running Synapse with Python 3.8, please upgrade to Python 3.9 (or greater) before upgrading Synapse.
+
+
+# Synapse 1.119.0rc2 (2024-11-11)
+
+Note that due to packaging issues there was no v1.119.0rc1.
+
+
+### Features
+
+- Support [MSC4151](https://github.com/matrix-org/matrix-spec-proposals/pull/4151)'s stable report room API. ([\#17374](https://github.com/element-hq/synapse/issues/17374))
+- Add experimental support for [MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222) (Adding `state_after` to sync v2). ([\#17888](https://github.com/element-hq/synapse/issues/17888))
+
+### Bugfixes
+
+- Fix bug with sliding sync where `$LAZY`-loading room members would not return `required_state` membership in incremental syncs. ([\#17809](https://github.com/element-hq/synapse/issues/17809))
+- Check if user has membership in a room before tagging it. Contributed by Lama Alosaimi. ([\#17839](https://github.com/element-hq/synapse/issues/17839))
+- Fix a bug in the admin redact endpoint where the background task would not run if a worker was specified in
+  the config option `run_background_tasks_on`. ([\#17847](https://github.com/element-hq/synapse/issues/17847))
+- Fix bug where some presence and typing timeouts can expire early. ([\#17850](https://github.com/element-hq/synapse/issues/17850))
+- Fix detection when the built Rust library was outdated when using source installations. ([\#17861](https://github.com/element-hq/synapse/issues/17861))
+- Fix a long-standing bug in Synapse which could cause one-time keys to be issued in the incorrect order, causing message decryption failures. ([\#17903](https://github.com/element-hq/synapse/pull/17903))
+- Fix experimental support for [MSC4222](https://github.com/matrix-org/matrix-spec-proposals/pull/4222) (Adding `state_after` to sync v2) where we would return the full state on incremental syncs when using lazy loaded members and there were no new events in the timeline. ([\#17915](https://github.com/element-hq/synapse/pull/17915))
+
+### Internal Changes
+
+- Remove support for python 3.8. ([\#17908](https://github.com/element-hq/synapse/issues/17908))
+- Add a test for downloading and thumbnailing a CMYK JPEG. ([\#17786](https://github.com/element-hq/synapse/issues/17786))
+- Refactor database calls to remove `Generator` usage. ([\#17813](https://github.com/element-hq/synapse/issues/17813), [\#17814](https://github.com/element-hq/synapse/issues/17814), [\#17815](https://github.com/element-hq/synapse/issues/17815), [\#17816](https://github.com/element-hq/synapse/issues/17816), [\#17817](https://github.com/element-hq/synapse/issues/17817), [\#17818](https://github.com/element-hq/synapse/issues/17818), [\#17890](https://github.com/element-hq/synapse/issues/17890))
+- Include the destination in the error of 'Destination mismatch' on federation requests. ([\#17830](https://github.com/element-hq/synapse/issues/17830))
+- The nix flake inside the repository no longer tracks nixpkgs/master to not catch the latest bugs from a PR merged 5 minutes ago. ([\#17852](https://github.com/element-hq/synapse/issues/17852))
+- Minor speed-up of sliding sync by computing extensions results in parallel. ([\#17884](https://github.com/element-hq/synapse/issues/17884))
+- Bump the default Python version in the Synapse Dockerfile from 3.11 -> 3.12. ([\#17887](https://github.com/element-hq/synapse/issues/17887))
+- Remove usage of internal header encoding API. ([\#17894](https://github.com/element-hq/synapse/issues/17894))
+- Use unique name for each os.arch variant when uploading Wheel artifacts. ([\#17905](https://github.com/element-hq/synapse/issues/17905))
+- Fix tests to run with latest Twisted. ([\#17906](https://github.com/element-hq/synapse/pull/17906), [\#17907](https://github.com/element-hq/synapse/pull/17907), [\#17911](https://github.com/element-hq/synapse/pull/17911))
+- Update version constraint to allow the latest poetry-core 1.9.1. ([\#17902](https://github.com/element-hq/synapse/pull/17902))
+- Update the portdb CI to use Python 3.13 and Postgres 17 as latest dependencies. ([\#17909](https://github.com/element-hq/synapse/pull/17909))
+- Add an index to `current_state_delta_stream` table. ([\#17912](https://github.com/element-hq/synapse/issues/17912))
+- Fix building and attaching release artifacts during the release process. ([\#17921](https://github.com/element-hq/synapse/issues/17921))
+
+### Updates to locked dependencies
+
+* Bump actions/download-artifact & actions/upload-artifact from 3 to 4 in /.github/workflows. ([\#17657](https://github.com/element-hq/synapse/issues/17657))
+* Bump anyhow from 1.0.89 to 1.0.92. ([\#17858](https://github.com/element-hq/synapse/issues/17858), [\#17876](https://github.com/element-hq/synapse/issues/17876), [\#17901](https://github.com/element-hq/synapse/issues/17901))
+* Bump bytes from 1.7.2 to 1.8.0. ([\#17877](https://github.com/element-hq/synapse/issues/17877))
+* Bump cryptography from 43.0.1 to 43.0.3. ([\#17853](https://github.com/element-hq/synapse/issues/17853))
+* Bump mypy-zope from 1.0.7 to 1.0.8. ([\#17898](https://github.com/element-hq/synapse/issues/17898))
+* Bump phonenumbers from 8.13.47 to 8.13.49. ([\#17880](https://github.com/element-hq/synapse/issues/17880), [\#17899](https://github.com/element-hq/synapse/issues/17899))
+* Bump python-multipart from 0.0.12 to 0.0.16. ([\#17879](https://github.com/element-hq/synapse/issues/17879))
+* Bump regex from 1.11.0 to 1.11.1. ([\#17874](https://github.com/element-hq/synapse/issues/17874))
+* Bump ruff from 0.6.9 to 0.7.2. ([\#17868](https://github.com/element-hq/synapse/issues/17868), [\#17897](https://github.com/element-hq/synapse/issues/17897))
+* Bump serde from 1.0.210 to 1.0.214. ([\#17875](https://github.com/element-hq/synapse/issues/17875), [\#17900](https://github.com/element-hq/synapse/issues/17900))
+* Bump serde_json from 1.0.128 to 1.0.132. ([\#17857](https://github.com/element-hq/synapse/issues/17857))
+* Bump types-psycopg2 from 2.9.21.20240819 to 2.9.21.20241019. ([\#17855](https://github.com/element-hq/synapse/issues/17855))
+* Bump types-setuptools from 75.1.0.20241014 to 75.2.0.20241019. ([\#17856](https://github.com/element-hq/synapse/issues/17856))
+
+# Synapse 1.118.0 (2024-10-29)
+
+No significant changes since 1.118.0rc1.
+
+### Python 3.8 support will be dropped in the next release
+
+Python 3.8 is now [end-of-life](https://devguide.python.org/versions/). As per our [Deprecation Policy for Platform Dependencies](https://element-hq.github.io/synapse/latest/deprecation_policy.html#policy), Synapse will be dropping support for Python 3.8 in the next release; Synapse 1.119.0.
+
+Synapse 1.118.x will be the final release to support Python 3.8. If you are running Synapse with Python 3.8, please upgrade before the 1.119.0 release, due in less than one month.
+
+### Python 3.13 and PostgreSQL 17 support
+
+On the other end of the spectrum, Synapse 1.118.0 is the first release to support [Python 3.13](https://www.python.org/downloads/release/python-3130/)! [PostgreSQL 17](https://www.postgresql.org/about/news/postgresql-17-released-2936/) is also supported as of this release.
+
+
+# Synapse 1.118.0rc1 (2024-10-22)
+
+### Features
+
+- Added the `display_name_claim` option to the JWT configuration. This option allows specifying the claim key that contains the user's display name in the JWT payload. ([\#17708](https://github.com/element-hq/synapse/issues/17708))
+- Implement [MSC4210](https://github.com/matrix-org/matrix-spec-proposals/pull/4210): Remove legacy mentions. Contributed by @tulir @ Beeper. ([\#17783](https://github.com/element-hq/synapse/issues/17783))
+
+### Bugfixes
+
+- Fix saving of PNG thumbnails, when the original image is in the CMYK color space. ([\#17736](https://github.com/element-hq/synapse/issues/17736))
+- Fix bug with sliding sync where the server would not return state that was added to the `required_state` config. ([\#17785](https://github.com/element-hq/synapse/issues/17785), [\#17805](https://github.com/element-hq/synapse/issues/17805))
+- Fix a bug in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync that would cause rooms to stay forgotten and hidden even after rejoining. ([\#17835](https://github.com/element-hq/synapse/issues/17835))
+
+### Improved Documentation
+
+- Clarify when the `user_may_invite` and `user_may_send_3pid_invite` module callbacks are called. ([\#17627](https://github.com/element-hq/synapse/issues/17627))
+- Correct documentation to refer to the `--config-path` argument instead of `--config-file`. ([\#17802](https://github.com/element-hq/synapse/issues/17802))
+- Fix typo in `target_cache_memory_usage` docs. ([\#17825](https://github.com/element-hq/synapse/issues/17825))
+
+### Internal Changes
+
+- Slight optimization when fetching state/events for Sliding Sync. ([\#17718](https://github.com/element-hq/synapse/issues/17718))
+- Add Python 3.13 and Postgres 17 to the test matrix. ([\#17752](https://github.com/element-hq/synapse/issues/17752))
+- Test github token before running release script steps. ([\#17803](https://github.com/element-hq/synapse/issues/17803))
+- Build debian packages for new Ubuntu versions, and stop building for no longer supported versions. ([\#17824](https://github.com/element-hq/synapse/issues/17824))
+- Enable the `.org.matrix.msc4028.encrypted_event` push rule by default in accordance with [MSC4028](https://github.com/matrix-org/matrix-spec-proposals/pull/4028). Note that the corresponding experimental feature must still be switched on for this push rule to have any effect. ([\#17826](https://github.com/element-hq/synapse/issues/17826))
+- Fix some typing issues uncovered by upgrading mypy to 1.11.x. ([\#17842](https://github.com/element-hq/synapse/issues/17842))
+
+
+
+### Updates to locked dependencies
+
+* Bump mypy from 1.10.1 to 1.11.2. ([\#17842](https://github.com/element-hq/synapse/issues/17842))
+* Bump mypy-zope from 1.0.5 to 1.0.7. ([\#17827](https://github.com/element-hq/synapse/issues/17827))
+* Bump phonenumbers from 8.13.46 to 8.13.47. ([\#17797](https://github.com/element-hq/synapse/issues/17797))
+* Bump psycopg2 from 2.9.9 to 2.9.10. ([\#17843](https://github.com/element-hq/synapse/issues/17843))
+* Bump ruff from 0.6.8 to 0.6.9. ([\#17794](https://github.com/element-hq/synapse/issues/17794))
+* Bump sentry-sdk from 2.14.0 to 2.15.0. ([\#17795](https://github.com/element-hq/synapse/issues/17795))
+* Bump sentry-sdk from 2.15.0 to 2.16.0. ([\#17829](https://github.com/element-hq/synapse/issues/17829))
+* Bump sentry-sdk from 2.16.0 to 2.17.0. ([\#17844](https://github.com/element-hq/synapse/issues/17844))
+* Bump sigstore/cosign-installer from 3.6.0 to 3.7.0. ([\#17798](https://github.com/element-hq/synapse/issues/17798))
+* Bump tomli from 2.0.1 to 2.0.2. ([\#17796](https://github.com/element-hq/synapse/issues/17796))
+* Bump types-requests from 2.32.0.20240914 to 2.32.0.20241016. ([\#17841](https://github.com/element-hq/synapse/issues/17841))
+* Bump types-setuptools from 75.1.0.20240917 to 75.1.0.20241014. ([\#17828](https://github.com/element-hq/synapse/issues/17828))
+
+# Synapse 1.117.0 (2024-10-15)
+
+No significant changes since 1.117.0rc1.
+
+
+
+
+# Synapse 1.117.0rc1 (2024-10-08)
+
+### Features
+
+- Add config option `redis.password_path`. ([\#17717](https://github.com/element-hq/synapse/issues/17717))
+
+### Bugfixes
+
+- Fix a rare bug introduced in v1.29.0 where invalidating a user's access token from a worker could raise an error. ([\#17779](https://github.com/element-hq/synapse/issues/17779))
+- In the response to `GET /_matrix/client/versions`, set the `unstable_features` flag for [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140) to `false` when server configuration disables support for delayed events. ([\#17780](https://github.com/element-hq/synapse/issues/17780))
+- Improve input validation and room membership checks in admin redaction API. ([\#17792](https://github.com/element-hq/synapse/issues/17792))
+
+### Improved Documentation
+
+- Clarify the docstring of `test_forget_when_not_left`. ([\#17628](https://github.com/element-hq/synapse/issues/17628))
+- Add documentation note about PYTHONMALLOC for accurate jemalloc memory tracking. Contributed by @hensg. ([\#17709](https://github.com/element-hq/synapse/issues/17709))
+- Remove spurious "TODO UPDATE ALL THIS" note in the Debian installation docs. ([\#17749](https://github.com/element-hq/synapse/issues/17749))
+- Explain how load balancing works for `federation_sender_instances`. ([\#17776](https://github.com/element-hq/synapse/issues/17776))
+
+### Internal Changes
+
+- Minor performance increase for large accounts using sliding sync. ([\#17751](https://github.com/element-hq/synapse/issues/17751))
+- Increase performance of the notifier when there are many syncing users. ([\#17765](https://github.com/element-hq/synapse/issues/17765), [\#17766](https://github.com/element-hq/synapse/issues/17766))
+- Fix performance of streams that don't change often. ([\#17767](https://github.com/element-hq/synapse/issues/17767))
+- Improve performance of sliding sync connections that do not ask for any rooms. ([\#17768](https://github.com/element-hq/synapse/issues/17768))
+- Reduce overhead of sliding sync E2EE loops. ([\#17771](https://github.com/element-hq/synapse/issues/17771))
+- Sliding sync minor performance speed up using new table. ([\#17787](https://github.com/element-hq/synapse/issues/17787))
+- Sliding sync minor performance improvement by omitting unchanged data from incremental responses. ([\#17788](https://github.com/element-hq/synapse/issues/17788))
+- Speed up sliding sync when there are many active subscriptions. ([\#17789](https://github.com/element-hq/synapse/issues/17789))
+- Add missing license headers on new source files. ([\#17799](https://github.com/element-hq/synapse/issues/17799))
+
+
+
+### Updates to locked dependencies
+
+* Bump phonenumbers from 8.13.45 to 8.13.46. ([\#17773](https://github.com/element-hq/synapse/issues/17773))
+* Bump python-multipart from 0.0.10 to 0.0.12. ([\#17772](https://github.com/element-hq/synapse/issues/17772))
+* Bump regex from 1.10.6 to 1.11.0. ([\#17770](https://github.com/element-hq/synapse/issues/17770))
+* Bump ruff from 0.6.7 to 0.6.8. ([\#17774](https://github.com/element-hq/synapse/issues/17774))
+
+# Synapse 1.116.0 (2024-10-01)
+
+No significant changes since 1.116.0rc2.
+
+
+
+
+# Synapse 1.116.0rc2 (2024-09-26)
+
+### Features
+
+- Add implementation of restricting who can overwrite a state event as proposed by [MSC3757](https://github.com/matrix-org/matrix-spec-proposals/pull/3757). ([\#17513](https://github.com/element-hq/synapse/issues/17513))
+
+
+
+
+# Synapse 1.116.0rc1 (2024-09-25)
+
+### Features
+
+- Add initial implementation of delayed events as proposed by [MSC4140](https://github.com/matrix-org/matrix-spec-proposals/pull/4140). ([\#17326](https://github.com/element-hq/synapse/issues/17326))
+- Add an asynchronous Admin API endpoint [to redact all a user's events](https://element-hq.github.io/synapse/v1.116/admin_api/user_admin_api.html#redact-all-the-events-of-a-user),
+  and [an endpoint to check on the status of that redaction task](https://element-hq.github.io/synapse/v1.116/admin_api/user_admin_api.html#check-the-status-of-a-redaction-process). ([\#17506](https://github.com/element-hq/synapse/issues/17506))
+- Add support for the `tags` and `not_tags` filters for [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17662](https://github.com/element-hq/synapse/issues/17662))
+- Guests can use the new media endpoints to download media, as described by [MSC4189](https://github.com/matrix-org/matrix-spec-proposals/pull/4189). ([\#17675](https://github.com/element-hq/synapse/issues/17675))
+- Add config option `turn_shared_secret_path`. ([\#17690](https://github.com/element-hq/synapse/issues/17690))
+- Return room tags in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync account data extension. ([\#17707](https://github.com/element-hq/synapse/issues/17707))
+
+### Bugfixes
+
+- Make sure we get up-to-date state information when using the new [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync tables to derive room membership. ([\#17692](https://github.com/element-hq/synapse/issues/17692))
+- Fix bug where room account data would not correctly be sent down [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync for old rooms. ([\#17695](https://github.com/element-hq/synapse/issues/17695))
+- Fix a bug in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync which could prevent /sync from working for certain user accounts. ([\#17727](https://github.com/element-hq/synapse/issues/17727), [\#17733](https://github.com/element-hq/synapse/issues/17733))
+- Ignore invites from ignored users in Sliding Sync. ([\#17729](https://github.com/element-hq/synapse/issues/17729))
+- Fix bug in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync where the server would incorrectly return a negative bump stamp, which caused Element X apps to stop syncing. ([\#17748](https://github.com/element-hq/synapse/issues/17748))
+
+### Internal Changes
+
+- Import pydantic objects from the `_pydantic_compat` module.
+  This allows `check_pydantic_models.py` to mock those pydantic objects
+  only in the synapse module, and not interfere with pydantic objects in
+  external dependencies. ([\#17667](https://github.com/element-hq/synapse/issues/17667))
+- Use [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync tables as a bulk shortcut for getting the max `event_stream_ordering` of rooms. ([\#17693](https://github.com/element-hq/synapse/issues/17693))
+- Speed up [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) sliding sync requests a bit where there are many room changes. ([\#17696](https://github.com/element-hq/synapse/issues/17696))
+- Refactor [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) sliding sync filter unit tests so the sliding sync API has better test coverage. ([\#17703](https://github.com/element-hq/synapse/issues/17703))
+- Fetch `bump_stamp`s more efficiently in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17723](https://github.com/element-hq/synapse/issues/17723))
+- Shortcut for checking if certain background updates have completed (utilized in [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync). ([\#17724](https://github.com/element-hq/synapse/issues/17724))
+- More efficiently fetch rooms for [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17725](https://github.com/element-hq/synapse/issues/17725))
+- Fix `_bulk_get_max_event_pos` being inefficient. ([\#17728](https://github.com/element-hq/synapse/issues/17728))
+- Add cache to `get_tags_for_room(...)`. ([\#17730](https://github.com/element-hq/synapse/issues/17730))
+- Small performance improvement in speeding up [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) Sliding Sync. ([\#17731](https://github.com/element-hq/synapse/issues/17731))
+- Minor speed up of initial [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) sliding sync requests. ([\#17734](https://github.com/element-hq/synapse/issues/17734))
+- Remove usage of the deprecated `cgi` module, deprecated in Python 3.11 and removed in Python 3.13. ([\#17741](https://github.com/element-hq/synapse/issues/17741))
+- Fix typing of a variable that is not `Unknown` anymore after updating `treq`. ([\#17744](https://github.com/element-hq/synapse/issues/17744))
+
+
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.86 to 1.0.89. ([\#17685](https://github.com/element-hq/synapse/issues/17685), [\#17716](https://github.com/element-hq/synapse/issues/17716))
+* Bump bytes from 1.7.1 to 1.7.2. ([\#17743](https://github.com/element-hq/synapse/issues/17743))
+* Bump cryptography from 43.0.0 to 43.0.1. ([\#17689](https://github.com/element-hq/synapse/issues/17689))
+* Bump idna from 3.8 to 3.10. ([\#17758](https://github.com/element-hq/synapse/issues/17758))
+* Bump msgpack from 1.0.8 to 1.1.0. ([\#17759](https://github.com/element-hq/synapse/issues/17759))
+* Bump phonenumbers from 8.13.44 to 8.13.45. ([\#17762](https://github.com/element-hq/synapse/issues/17762))
+* Bump prometheus-client from 0.20.0 to 0.21.0. ([\#17746](https://github.com/element-hq/synapse/issues/17746))
+* Bump pyasn1 from 0.6.0 to 0.6.1. ([\#17714](https://github.com/element-hq/synapse/issues/17714))
+* Bump pyasn1-modules from 0.4.0 to 0.4.1. ([\#17747](https://github.com/element-hq/synapse/issues/17747))
+* Bump pydantic from 2.8.2 to 2.9.2. ([\#17756](https://github.com/element-hq/synapse/issues/17756))
+* Bump python-multipart from 0.0.9 to 0.0.10. ([\#17745](https://github.com/element-hq/synapse/issues/17745))
+* Bump ruff from 0.6.4 to 0.6.7. ([\#17715](https://github.com/element-hq/synapse/issues/17715), [\#17760](https://github.com/element-hq/synapse/issues/17760))
+* Bump sentry-sdk from 2.13.0 to 2.14.0. ([\#17712](https://github.com/element-hq/synapse/issues/17712))
+* Bump serde from 1.0.209 to 1.0.210. ([\#17686](https://github.com/element-hq/synapse/issues/17686))
+* Bump serde_json from 1.0.127 to 1.0.128. ([\#17687](https://github.com/element-hq/synapse/issues/17687))
+* Bump treq from 23.11.0 to 24.9.1. ([\#17744](https://github.com/element-hq/synapse/issues/17744))
+* Bump types-pyyaml from 6.0.12.20240808 to 6.0.12.20240917. ([\#17755](https://github.com/element-hq/synapse/issues/17755))
+* Bump types-requests from 2.32.0.20240712 to 2.32.0.20240914. ([\#17713](https://github.com/element-hq/synapse/issues/17713))
+* Bump types-setuptools from 74.1.0.20240907 to 75.1.0.20240917. ([\#17757](https://github.com/element-hq/synapse/issues/17757))
+
+# Synapse 1.115.0 (2024-09-17)
+
+No significant changes since 1.115.0rc2.
+
+
+
+
+# Synapse 1.115.0rc2 (2024-09-12)
+
+### Internal Changes
+
+- Pre-populate room data used in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint for quick filtering/sorting. ([\#17652](https://github.com/element-hq/synapse/issues/17652))
+- Speed up sliding sync by reducing amount of data pulled out of the database for large rooms. ([\#17683](https://github.com/element-hq/synapse/issues/17683))
+
+
+
+
+# Synapse 1.115.0rc1 (2024-09-10)
+
+### Features
+
+- Improve cross-signing upload when using [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) to use a custom UIA flow stage, with web fallback support. ([\#17509](https://github.com/element-hq/synapse/issues/17509))
+
+### Bugfixes
+
+- Return `400 M_BAD_JSON` upon attempting to complete various room actions with a non-local user ID and unknown room ID, rather than an internal server error. ([\#17607](https://github.com/element-hq/synapse/issues/17607))
+- Fix authenticated media responses using a wrong limit when following redirects over federation. ([\#17626](https://github.com/element-hq/synapse/issues/17626))
+- Fix bug where we returned the wrong `bump_stamp` for invites in sliding sync response, causing incorrect ordering of invites in the room list. ([\#17674](https://github.com/element-hq/synapse/issues/17674))
+
+### Improved Documentation
+
+- Clarify that the admin api resource is only loaded on the main process and not workers. ([\#17590](https://github.com/element-hq/synapse/issues/17590))
+- Fixed typo in `saml2_config` config [example](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#saml2_config). ([\#17594](https://github.com/element-hq/synapse/issues/17594))
+
+### Deprecations and Removals
+
+- Stabilise [MSC4156](https://github.com/matrix-org/matrix-spec-proposals/pull/4156) by removing the `msc4156_enabled` config setting and defaulting it to `true`. ([\#17650](https://github.com/element-hq/synapse/issues/17650))
+
+### Internal Changes
+
+- Update [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) implementation: load the issuer and account management URLs from OIDC discovery. ([\#17407](https://github.com/element-hq/synapse/issues/17407))
+- Pre-populate room data used in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint for quick filtering/sorting. ([\#17512](https://github.com/element-hq/synapse/issues/17512), [\#17632](https://github.com/element-hq/synapse/issues/17632), [\#17633](https://github.com/element-hq/synapse/issues/17633), [\#17634](https://github.com/element-hq/synapse/issues/17634), [\#17635](https://github.com/element-hq/synapse/issues/17635), [\#17636](https://github.com/element-hq/synapse/issues/17636), [\#17641](https://github.com/element-hq/synapse/issues/17641), [\#17654](https://github.com/element-hq/synapse/issues/17654), [\#17673](https://github.com/element-hq/synapse/issues/17673))
+- Store sliding sync per-connection state in the database. ([\#17599](https://github.com/element-hq/synapse/issues/17599), [\#17631](https://github.com/element-hq/synapse/issues/17631))
+- Make the sliding sync `PerConnectionState` class immutable. ([\#17600](https://github.com/element-hq/synapse/issues/17600))
+- Replace `isort` and `black` with `ruff`. ([\#17620](https://github.com/element-hq/synapse/issues/17620), [\#17643](https://github.com/element-hq/synapse/issues/17643))
+- Sliding Sync: Split up `get_room_membership_for_user_at_to_token`. ([\#17629](https://github.com/element-hq/synapse/issues/17629))
+- Use new database tables for sliding sync. ([\#17630](https://github.com/element-hq/synapse/issues/17630), [\#17649](https://github.com/element-hq/synapse/issues/17649))
+- Prevent duplicate tags being added to Sliding Sync traces. ([\#17655](https://github.com/element-hq/synapse/issues/17655))
+- Get `bump_stamp` from [new sliding sync tables](https://github.com/element-hq/synapse/pull/17512) which should be faster. ([\#17658](https://github.com/element-hq/synapse/issues/17658))
+- Speed up incremental Sliding Sync requests by avoiding extra work. ([\#17665](https://github.com/element-hq/synapse/issues/17665))
+- Small performance improvement in speeding up sliding sync. ([\#17666](https://github.com/element-hq/synapse/issues/17666), [\#17670](https://github.com/element-hq/synapse/issues/17670), [\#17672](https://github.com/element-hq/synapse/issues/17672))
+- Speed up sliding sync by reducing number of database calls. ([\#17684](https://github.com/element-hq/synapse/issues/17684))
+- Speed up sync by pulling out fewer events from the database. ([\#17688](https://github.com/element-hq/synapse/issues/17688))
+
+
+
+### Updates to locked dependencies
+
+* Bump authlib from 1.3.1 to 1.3.2. ([\#17679](https://github.com/element-hq/synapse/issues/17679))
+* Bump idna from 3.7 to 3.8. ([\#17682](https://github.com/element-hq/synapse/issues/17682))
+* Bump ruff from 0.6.2 to 0.6.4. ([\#17680](https://github.com/element-hq/synapse/issues/17680))
+* Bump towncrier from 24.7.1 to 24.8.0. ([\#17645](https://github.com/element-hq/synapse/issues/17645))
+* Bump twisted from 24.7.0rc1 to 24.7.0. ([\#17647](https://github.com/element-hq/synapse/issues/17647))
+* Bump types-pillow from 10.2.0.20240520 to 10.2.0.20240822. ([\#17644](https://github.com/element-hq/synapse/issues/17644))
+* Bump types-psycopg2 from 2.9.21.20240417 to 2.9.21.20240819. ([\#17646](https://github.com/element-hq/synapse/issues/17646))
+* Bump types-setuptools from 71.1.0.20240818 to 74.1.0.20240907. ([\#17681](https://github.com/element-hq/synapse/issues/17681))
+
+# Synapse 1.114.0 (2024-09-02)
+
+This release enables support for
+[MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186) —
+Simplified Sliding Sync. This allows using the upcoming releases of the Element
+X mobile apps without having to run a Sliding Sync Proxy.
+
+
+### Features
+
+- Enable native sliding sync support ([MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) and [MSC4186](https://github.com/matrix-org/matrix-spec-proposals/pull/4186)) by default. ([\#17648](https://github.com/element-hq/synapse/issues/17648))
+
+
+
+
+# Synapse 1.114.0rc3 (2024-08-30)
+
+### Bugfixes
+
+- Fix regression in v1.114.0rc2 that caused workers to fail to start. ([\#17626](https://github.com/element-hq/synapse/issues/17626))
+
+
+
+
+# Synapse 1.114.0rc2 (2024-08-30)
+
+### Features
+
+- Improve cross-signing upload when using [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) to use a custom UIA flow stage, with web fallback support. ([\#17509](https://github.com/element-hq/synapse/issues/17509))
+- Make `hash_password` script accept password input from stdin. ([\#17608](https://github.com/element-hq/synapse/issues/17608))
+
+### Bugfixes
+
+- Fix hierarchy returning 403 when room is accessible through federation. Contributed by Krishan (@kfiven). ([\#17194](https://github.com/element-hq/synapse/issues/17194))
+- Fix content-length on federation `/thumbnail` responses. ([\#17532](https://github.com/element-hq/synapse/issues/17532))
+- Fix authenticated media responses using a wrong limit when following redirects over federation. ([\#17543](https://github.com/element-hq/synapse/issues/17543))
+
+### Internal Changes
+
+- MSC3861: load the issuer and account management URLs from OIDC discovery. ([\#17407](https://github.com/element-hq/synapse/issues/17407))
+- Refactor sliding sync class into multiple files. ([\#17595](https://github.com/element-hq/synapse/issues/17595))
+- Store sliding sync per-connection state in the database. ([\#17599](https://github.com/element-hq/synapse/issues/17599))
+- Make the sliding sync `PerConnectionState` class immutable. ([\#17600](https://github.com/element-hq/synapse/issues/17600))
+- Add support to `@tag_args` for standalone functions. ([\#17604](https://github.com/element-hq/synapse/issues/17604))
+- Speed up incremental syncs in sliding sync by adding some more caching. ([\#17606](https://github.com/element-hq/synapse/issues/17606))
+- Always return the user's own read receipts in sliding sync. ([\#17617](https://github.com/element-hq/synapse/issues/17617))
+- Replace `isort` and `black` with `ruff`. ([\#17620](https://github.com/element-hq/synapse/issues/17620))
+- Refactor sliding sync code to move room list logic out into a separate class. ([\#17622](https://github.com/element-hq/synapse/issues/17622))
+
+
+
+### Updates to locked dependencies
+
+* Bump attrs from 23.2.0 to 24.2.0. ([\#17609](https://github.com/element-hq/synapse/issues/17609))
+* Bump cryptography from 42.0.8 to 43.0.0. ([\#17584](https://github.com/element-hq/synapse/issues/17584))
+* Bump phonenumbers from 8.13.43 to 8.13.44. ([\#17610](https://github.com/element-hq/synapse/issues/17610))
+* Bump pygithub from 2.3.0 to 2.4.0. ([\#17612](https://github.com/element-hq/synapse/issues/17612))
+* Bump pyyaml from 6.0.1 to 6.0.2. ([\#17611](https://github.com/element-hq/synapse/issues/17611))
+* Bump sentry-sdk from 2.12.0 to 2.13.0. ([\#17585](https://github.com/element-hq/synapse/issues/17585))
+* Bump serde from 1.0.206 to 1.0.208. ([\#17581](https://github.com/element-hq/synapse/issues/17581))
+* Bump serde from 1.0.208 to 1.0.209. ([\#17613](https://github.com/element-hq/synapse/issues/17613))
+* Bump serde_json from 1.0.124 to 1.0.125. ([\#17582](https://github.com/element-hq/synapse/issues/17582))
+* Bump serde_json from 1.0.125 to 1.0.127. ([\#17614](https://github.com/element-hq/synapse/issues/17614))
+* Bump types-jsonschema from 4.23.0.20240712 to 4.23.0.20240813. ([\#17583](https://github.com/element-hq/synapse/issues/17583))
+* Bump types-setuptools from 71.1.0.20240726 to 71.1.0.20240818. ([\#17586](https://github.com/element-hq/synapse/issues/17586))
+
+# Synapse 1.114.0rc1 (2024-08-20)
+
+### Features
+
+- Add a flag to `/versions`, `org.matrix.simplified_msc3575`, to indicate whether experimental sliding sync support has been enabled. ([\#17571](https://github.com/element-hq/synapse/issues/17571))
+- Handle changes in `timeline_limit` in experimental sliding sync. ([\#17579](https://github.com/element-hq/synapse/issues/17579))
+- Correctly track read receipts that should be sent down in experimental sliding sync. ([\#17575](https://github.com/element-hq/synapse/issues/17575), [\#17589](https://github.com/element-hq/synapse/issues/17589), [\#17592](https://github.com/element-hq/synapse/issues/17592))
+
+### Bugfixes
+
+- Start handlers for new media endpoints when media resource configured. ([\#17483](https://github.com/element-hq/synapse/issues/17483))
+- Fix timeline ordering (using `stream_ordering` instead of topological ordering) in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17510](https://github.com/element-hq/synapse/issues/17510))
+- Fix experimental sliding sync implementation to remember any updates in rooms that were not sent down immediately. ([\#17535](https://github.com/element-hq/synapse/issues/17535))
+- Better exclude partially stated rooms if we must await full state in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17538](https://github.com/element-hq/synapse/issues/17538))
+- Handle lower-case http headers in `_Mulitpart_Parser_Protocol`. ([\#17545](https://github.com/element-hq/synapse/issues/17545))
+- Fix fetching federation signing keys from servers that omit `old_verify_keys`. Contributed by @tulir @ Beeper. ([\#17568](https://github.com/element-hq/synapse/issues/17568))
+- Fix bug where we would respond with an error when a remote server asked for media that had a length of 0, using the new multipart federation media endpoint. ([\#17570](https://github.com/element-hq/synapse/issues/17570))
+
+### Improved Documentation
+
+- Clarify default behaviour of the
+  [`auto_accept_invites.worker_to_run_on`](https://element-hq.github.io/synapse/develop/usage/configuration/config_documentation.html#auto-accept-invites)
+  option. ([\#17515](https://github.com/element-hq/synapse/issues/17515))
+- Improve docstrings for profile methods. ([\#17559](https://github.com/element-hq/synapse/issues/17559))
+
+### Internal Changes
+
+- Add more tracing to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17514](https://github.com/element-hq/synapse/issues/17514))
+- Fixup comment in sliding sync implementation. ([\#17531](https://github.com/element-hq/synapse/issues/17531))
+- Replace override of deprecated method `HTTPAdapter.get_connection` with `get_connection_with_tls_context`. ([\#17536](https://github.com/element-hq/synapse/issues/17536))
+- Fix performance of device lists in `/key/changes` and sliding sync. ([\#17537](https://github.com/element-hq/synapse/issues/17537), [\#17548](https://github.com/element-hq/synapse/issues/17548))
+- Bump setuptools from 67.6.0 to 72.1.0. ([\#17542](https://github.com/element-hq/synapse/issues/17542))
+- Add a utility function for generating random event IDs. ([\#17557](https://github.com/element-hq/synapse/issues/17557))
+- Speed up responding to media requests. ([\#17558](https://github.com/element-hq/synapse/issues/17558), [\#17561](https://github.com/element-hq/synapse/issues/17561), [\#17564](https://github.com/element-hq/synapse/issues/17564), [\#17566](https://github.com/element-hq/synapse/issues/17566), [\#17567](https://github.com/element-hq/synapse/issues/17567), [\#17569](https://github.com/element-hq/synapse/issues/17569))
+- Test github token before running release script steps. ([\#17562](https://github.com/element-hq/synapse/issues/17562))
+- Reduce log spam of multipart files. ([\#17563](https://github.com/element-hq/synapse/issues/17563))
+- Refactor per-connection state in experimental sliding sync handler. ([\#17574](https://github.com/element-hq/synapse/issues/17574))
+- Add histogram metrics for sliding sync processing time. ([\#17593](https://github.com/element-hq/synapse/issues/17593))
+
+
+
+### Updates to locked dependencies
+
+* Bump bytes from 1.6.1 to 1.7.1. ([\#17526](https://github.com/element-hq/synapse/issues/17526))
+* Bump lxml from 5.2.2 to 5.3.0. ([\#17550](https://github.com/element-hq/synapse/issues/17550))
+* Bump phonenumbers from 8.13.42 to 8.13.43. ([\#17551](https://github.com/element-hq/synapse/issues/17551))
+* Bump regex from 1.10.5 to 1.10.6. ([\#17527](https://github.com/element-hq/synapse/issues/17527))
+* Bump sentry-sdk from 2.10.0 to 2.12.0. ([\#17553](https://github.com/element-hq/synapse/issues/17553))
+* Bump serde from 1.0.204 to 1.0.206. ([\#17556](https://github.com/element-hq/synapse/issues/17556))
+* Bump serde_json from 1.0.122 to 1.0.124. ([\#17555](https://github.com/element-hq/synapse/issues/17555))
+* Bump sigstore/cosign-installer from 3.5.0 to 3.6.0. ([\#17549](https://github.com/element-hq/synapse/issues/17549))
+* Bump types-pyyaml from 6.0.12.20240311 to 6.0.12.20240808. ([\#17552](https://github.com/element-hq/synapse/issues/17552))
+* Bump types-requests from 2.31.0.20240406 to 2.32.0.20240712. ([\#17524](https://github.com/element-hq/synapse/issues/17524))
+
+# Synapse 1.113.0 (2024-08-13)
+
+No significant changes since 1.113.0rc1.
+
+
+
+
+# Synapse 1.113.0rc1 (2024-08-06)
+
+### Features
+
+- Track which rooms have been sent to clients in the experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17447](https://github.com/element-hq/synapse/issues/17447))
+- Add Account Data extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17477](https://github.com/element-hq/synapse/issues/17477))
+- Add receipts extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17489](https://github.com/element-hq/synapse/issues/17489))
+- Add typing notification extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17505](https://github.com/element-hq/synapse/issues/17505))
+
+### Bugfixes
+
+- Update experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint to handle invite/knock rooms when filtering. ([\#17450](https://github.com/element-hq/synapse/issues/17450))
+- Fix a bug introduced in v1.110.0 which caused `/keys/query` to return incomplete results, leading to high network activity and CPU usage on Matrix clients. ([\#17499](https://github.com/element-hq/synapse/issues/17499))
+
+### Improved Documentation
+
+- Update the [`allowed_local_3pids`](https://element-hq.github.io/synapse/v1.112/usage/configuration/config_documentation.html#allowed_local_3pids) config option's msisdn address to a working example. ([\#17476](https://github.com/element-hq/synapse/issues/17476))
+
+### Internal Changes
+
+- Change sliding sync to use their own token format in preparation for storing per-connection state. ([\#17452](https://github.com/element-hq/synapse/issues/17452))
+- Ensure we don't send down negative `bump_stamp` in experimental sliding sync endpoint. ([\#17478](https://github.com/element-hq/synapse/issues/17478))
+- Do not send down empty room entries down experimental sliding sync endpoint. ([\#17479](https://github.com/element-hq/synapse/issues/17479))
+- Refactor Sliding Sync tests to better utilize the `SlidingSyncBase`. ([\#17481](https://github.com/element-hq/synapse/issues/17481), [\#17482](https://github.com/element-hq/synapse/issues/17482))
+- Add some opentracing tags and logging to the experimental sliding sync implementation. ([\#17501](https://github.com/element-hq/synapse/issues/17501))
+- Split and move Sliding Sync tests so we have some more sane test file sizes. ([\#17504](https://github.com/element-hq/synapse/issues/17504))
+- Update the `limited` field description in the Sliding Sync response to accurately describe what it actually represents. ([\#17507](https://github.com/element-hq/synapse/issues/17507))
+- Easier to understand `timeline` assertions in Sliding Sync tests. ([\#17511](https://github.com/element-hq/synapse/issues/17511))
+- Reset the sliding sync connection if we don't recognize the per-connection state position. ([\#17529](https://github.com/element-hq/synapse/issues/17529))
+
+
+
+### Updates to locked dependencies
+
+* Bump bcrypt from 4.1.3 to 4.2.0. ([\#17495](https://github.com/element-hq/synapse/issues/17495))
+* Bump black from 24.4.2 to 24.8.0. ([\#17522](https://github.com/element-hq/synapse/issues/17522))
+* Bump phonenumbers from 8.13.39 to 8.13.42. ([\#17521](https://github.com/element-hq/synapse/issues/17521))
+* Bump ruff from 0.5.4 to 0.5.5. ([\#17494](https://github.com/element-hq/synapse/issues/17494))
+* Bump serde_json from 1.0.120 to 1.0.121. ([\#17493](https://github.com/element-hq/synapse/issues/17493))
+* Bump serde_json from 1.0.121 to 1.0.122. ([\#17525](https://github.com/element-hq/synapse/issues/17525))
+* Bump towncrier from 23.11.0 to 24.7.1. ([\#17523](https://github.com/element-hq/synapse/issues/17523))
+* Bump types-pyopenssl from 24.1.0.20240425 to 24.1.0.20240722. ([\#17496](https://github.com/element-hq/synapse/issues/17496))
+* Bump types-setuptools from 70.1.0.20240627 to 71.1.0.20240726. ([\#17497](https://github.com/element-hq/synapse/issues/17497))
+
+# Synapse 1.112.0 (2024-07-30)
+
+This security release is to update our locked dependency on Twisted to 24.7.0rc1, which includes a security fix for [CVE-2024-41671 / GHSA-c8m8-j448-xjx7: Disordered HTTP pipeline response in twisted.web, again](https://github.com/twisted/twisted/security/advisories/GHSA-c8m8-j448-xjx7).
+
+Note that this security fix is also available as **Synapse 1.111.1**, which does not include the rest of the changes in Synapse 1.112.0.
+
+This issue means that, if multiple HTTP requests are pipelined in the same TCP connection, Synapse can send responses to the wrong HTTP request.
+If a reverse proxy was configured to use HTTP pipelining, this could result in responses being sent to the wrong user, severely harming confidentiality.
+
+With that said, despite being a high severity issue, **we consider it unlikely that Synapse installations will be affected**.
+The use of HTTP pipelining in this fashion would cause worse performance for clients (request-response latencies would be increased as users' responses would be artificially blocked behind other users' slow requests). Further, Nginx and Haproxy, two common reverse proxies, do not appear to support configuring their upstreams to use HTTP pipelining and thus would not be affected. For both of these reasons, we consider it unlikely that a Synapse deployment would be set up in such a configuration.
+
+Despite that, we cannot rule out that some installations may exist with this unusual setup and so we are releasing this security update today.
+
+**pip users:** Note that by default, upgrading Synapse using pip will not automatically upgrade Twisted. **Please manually install the new version of Twisted** using `pip install Twisted==24.7.0rc1`. Note also that even the `--upgrade-strategy=eager` flag to `pip install -U matrix-synapse` will not upgrade Twisted to a patched version because it is only a release candidate at this time.
+
+### Internal Changes
+
+- Upgrade locked dependency on Twisted to 24.7.0rc1. ([\#17502](https://github.com/element-hq/synapse/issues/17502))
+
+
+# Synapse 1.112.0rc1 (2024-07-23)
+
+Please note that this release candidate does not include the security dependency update
+included in version 1.111.1 as this version was released before 1.111.1.
+The same security fix can be found in the full release of 1.112.0.
+
+### Features
+
+- Add to-device extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17416](https://github.com/element-hq/synapse/issues/17416))
+- Populate `name`/`avatar` fields in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17418](https://github.com/element-hq/synapse/issues/17418))
+- Populate `heroes` and room summary fields (`joined_count`, `invited_count`) in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17419](https://github.com/element-hq/synapse/issues/17419))
+- Populate `is_dm` room field in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17429](https://github.com/element-hq/synapse/issues/17429))
+- Add room subscriptions to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17432](https://github.com/element-hq/synapse/issues/17432))
+- Prepare for authenticated media freeze. ([\#17433](https://github.com/element-hq/synapse/issues/17433))
+- Add E2EE extension support to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17454](https://github.com/element-hq/synapse/issues/17454))
+
+### Bugfixes
+
+- Add configurable option to always include offline users in presence sync results. Contributed by @Michael-Hollister. ([\#17231](https://github.com/element-hq/synapse/issues/17231))
+- Fix bug in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint when using room type filters and the user has one or more remote invites. ([\#17434](https://github.com/element-hq/synapse/issues/17434))
+- Order `heroes` by `stream_ordering` as the Matrix specification states (applies to `/sync`). ([\#17435](https://github.com/element-hq/synapse/issues/17435))
+- Fix rare bug where `/sync` would break for a user when using workers with multiple stream writers. ([\#17438](https://github.com/element-hq/synapse/issues/17438))
+
+### Improved Documentation
+
+- Update the readme image to have a white background, so that it is readable in dark mode. ([\#17387](https://github.com/element-hq/synapse/issues/17387))
+- Add Red Hat Enterprise Linux and Rocky Linux 8 and 9 installation instructions. ([\#17423](https://github.com/element-hq/synapse/issues/17423))
+- Improve documentation for the [`default_power_level_content_override`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#default_power_level_content_override) config option. ([\#17451](https://github.com/element-hq/synapse/issues/17451))
+
+### Internal Changes
+
+- Make sure we always use the right logic for enabling the media repo. ([\#17424](https://github.com/element-hq/synapse/issues/17424))
+- Fix argument documentation for method `RateLimiter.record_action`. ([\#17426](https://github.com/element-hq/synapse/issues/17426))
+- Reduce volume of 'Waiting for current token' logs, which were introduced in v1.109.0. ([\#17428](https://github.com/element-hq/synapse/issues/17428))
+- Limit concurrent remote downloads to 6 per IP address, and decrement remote downloads without a content-length from the ratelimiter after the download is complete. ([\#17439](https://github.com/element-hq/synapse/issues/17439))
+- Remove unnecessary call to resume producing in fake channel. ([\#17449](https://github.com/element-hq/synapse/issues/17449))
+- Update experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint to bump room when it is created. ([\#17453](https://github.com/element-hq/synapse/issues/17453))
+- Speed up generating sliding sync responses. ([\#17458](https://github.com/element-hq/synapse/issues/17458))
+- Add cache to `get_rooms_for_local_user_where_membership_is` to speed up sliding sync. ([\#17460](https://github.com/element-hq/synapse/issues/17460))
+- Speed up fetching room keys from backup. ([\#17461](https://github.com/element-hq/synapse/issues/17461))
+- Speed up sorting of the room list in sliding sync. ([\#17468](https://github.com/element-hq/synapse/issues/17468))
+- Implement handling of `$ME` as a state key in sliding sync. ([\#17469](https://github.com/element-hq/synapse/issues/17469))
+
+
+
+### Updates to locked dependencies
+
+* Bump bytes from 1.6.0 to 1.6.1. ([\#17441](https://github.com/element-hq/synapse/issues/17441))
+* Bump hiredis from 2.3.2 to 3.0.0. ([\#17464](https://github.com/element-hq/synapse/issues/17464))
+* Bump jsonschema from 4.22.0 to 4.23.0. ([\#17444](https://github.com/element-hq/synapse/issues/17444))
+* Bump matrix-org/done-action from 2 to 3. ([\#17440](https://github.com/element-hq/synapse/issues/17440))
+* Bump mypy from 1.9.0 to 1.10.1. ([\#17445](https://github.com/element-hq/synapse/issues/17445))
+* Bump pyopenssl from 24.1.0 to 24.2.1. ([\#17465](https://github.com/element-hq/synapse/issues/17465))
+* Bump ruff from 0.5.0 to 0.5.4. ([\#17466](https://github.com/element-hq/synapse/issues/17466))
+* Bump sentry-sdk from 2.6.0 to 2.8.0. ([\#17456](https://github.com/element-hq/synapse/issues/17456))
+* Bump sentry-sdk from 2.8.0 to 2.10.0. ([\#17467](https://github.com/element-hq/synapse/issues/17467))
+* Bump setuptools from 67.6.0 to 70.0.0. ([\#17448](https://github.com/element-hq/synapse/issues/17448))
+* Bump twine from 5.1.0 to 5.1.1. ([\#17443](https://github.com/element-hq/synapse/issues/17443))
+* Bump types-jsonschema from 4.22.0.20240610 to 4.23.0.20240712. ([\#17446](https://github.com/element-hq/synapse/issues/17446))
+* Bump ulid from 1.1.2 to 1.1.3. ([\#17442](https://github.com/element-hq/synapse/issues/17442))
+* Bump zipp from 3.15.0 to 3.19.1. ([\#17427](https://github.com/element-hq/synapse/issues/17427))
+
+
+# Synapse 1.111.1 (2024-07-30)
+
+This security release is to update our locked dependency on Twisted to 24.7.0rc1, which includes a security fix for [CVE-2024-41671 / GHSA-c8m8-j448-xjx7: Disordered HTTP pipeline response in twisted.web, again](https://github.com/twisted/twisted/security/advisories/GHSA-c8m8-j448-xjx7).
+
+This issue means that, if multiple HTTP requests are pipelined in the same TCP connection, Synapse can send responses to the wrong HTTP request.
+If a reverse proxy was configured to use HTTP pipelining, this could result in responses being sent to the wrong user, severely harming confidentiality.
+
+With that said, despite being a high severity issue, **we consider it unlikely that Synapse installations will be affected**.
+The use of HTTP pipelining in this fashion would cause worse performance for clients (request-response latencies would be increased as users' responses would be artificially blocked behind other users' slow requests). Further, Nginx and Haproxy, two common reverse proxies, do not appear to support configuring their upstreams to use HTTP pipelining and thus would not be affected. For both of these reasons, we consider it unlikely that a Synapse deployment would be set up in such a configuration.
+
+Despite that, we cannot rule out that some installations may exist with this unusual setup and so we are releasing this security update today.
+
+**pip users:** Note that by default, upgrading Synapse using pip will not automatically upgrade Twisted. **Please manually install the new version of Twisted** using `pip install Twisted==24.7.0rc1`. Note also that even the `--upgrade-strategy=eager` flag to `pip install -U matrix-synapse` will not upgrade Twisted to a patched version because it is only a release candidate at this time.
+
+
+### Internal Changes
+
+- Upgrade locked dependency on Twisted to 24.7.0rc1. ([\#17502](https://github.com/element-hq/synapse/issues/17502))
+
+
+# Synapse 1.111.0 (2024-07-16)
+
+No significant changes since 1.111.0rc2.
+
+
+
+
+# Synapse 1.111.0rc2 (2024-07-10)
+
+### Bugfixes
+
+- Fix bug where using `synapse.app.media_repository` worker configuration would break the new media endpoints. ([\#17420](https://github.com/element-hq/synapse/issues/17420))
+
+### Improved Documentation
+
+- Document the new federation media worker endpoints in the [upgrade notes](https://element-hq.github.io/synapse/v1.111/upgrade.html) and [worker docs](https://element-hq.github.io/synapse/v1.111/workers.html). ([\#17421](https://github.com/element-hq/synapse/issues/17421))
+
+### Internal Changes
+
+- Route authenticated federation media requests to media repository workers in Complement tests. ([\#17422](https://github.com/element-hq/synapse/issues/17422))
+
+
+
+
+# Synapse 1.111.0rc1 (2024-07-09)
+
+### Features
+
+- Add `rooms` data to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17320](https://github.com/element-hq/synapse/issues/17320))
+- Add `room_types`/`not_room_types` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17337](https://github.com/element-hq/synapse/issues/17337))
+- Return "required state" in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17342](https://github.com/element-hq/synapse/issues/17342))
+- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/blob/main/proposals/3916-authentication-for-media.md) by adding [`_matrix/client/v1/media/download`](https://spec.matrix.org/v1.11/client-server-api/#get_matrixclientv1mediadownloadservernamemediaid) endpoint. ([\#17365](https://github.com/element-hq/synapse/issues/17365))
+- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/blob/rav/authentication-for-media/proposals/3916-authentication-for-media.md)
+  by adding [`_matrix/client/v1/media/thumbnail`](https://spec.matrix.org/v1.11/client-server-api/#get_matrixclientv1mediathumbnailservernamemediaid), [`_matrix/federation/v1/media/thumbnail`](https://spec.matrix.org/v1.11/server-server-api/#get_matrixfederationv1mediathumbnailmediaid) endpoints and stabilizing the
+  remaining [`_matrix/client/v1/media`](https://spec.matrix.org/v1.11/client-server-api/#get_matrixclientv1mediaconfig) endpoints. ([\#17388](https://github.com/element-hq/synapse/issues/17388))
+- Add `rooms.bump_stamp` for easier client-side sorting in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17395](https://github.com/element-hq/synapse/issues/17395))
+- Forget all of a user's rooms upon deactivation, preventing local room purges from being blocked on deactivated users. ([\#17400](https://github.com/element-hq/synapse/issues/17400))
+- Declare support for [Matrix 1.11](https://matrix.org/blog/2024/06/20/matrix-v1.11-release/). ([\#17403](https://github.com/element-hq/synapse/issues/17403))
+- [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861): allow overriding the introspection endpoint. ([\#17406](https://github.com/element-hq/synapse/issues/17406))
+
+### Bugfixes
+
+- Fix rare race which caused no new to-device messages to be received from remote server. ([\#17362](https://github.com/element-hq/synapse/issues/17362))
+- Fix bug in experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint when using an old database. ([\#17398](https://github.com/element-hq/synapse/issues/17398))
+
+### Improved Documentation
+
+- Clarify that `url_preview_url_blacklist` is a usability feature. ([\#17356](https://github.com/element-hq/synapse/issues/17356))
+- Fix broken links in README. ([\#17379](https://github.com/element-hq/synapse/issues/17379))
+- Clarify that changelog content *and file extension* need to match in order for entries to merge. ([\#17399](https://github.com/element-hq/synapse/issues/17399))
+
+### Internal Changes
+
+- Make the release script create a release branch for Complement as well. ([\#17318](https://github.com/element-hq/synapse/issues/17318))
+- Fix uploading packages to PyPi. ([\#17363](https://github.com/element-hq/synapse/issues/17363))
+- Add CI check for the README. ([\#17367](https://github.com/element-hq/synapse/issues/17367))
+- Fix linting errors from new `ruff` version. ([\#17381](https://github.com/element-hq/synapse/issues/17381), [\#17411](https://github.com/element-hq/synapse/issues/17411))
+- Fix building debian packages on non-clean checkouts. ([\#17390](https://github.com/element-hq/synapse/issues/17390))
+- Finish up work to allow per-user feature flags. ([\#17392](https://github.com/element-hq/synapse/issues/17392), [\#17410](https://github.com/element-hq/synapse/issues/17410))
+- Allow enabling sliding sync per-user. ([\#17393](https://github.com/element-hq/synapse/issues/17393))
+
+
+
+### Updates to locked dependencies
+
+* Bump certifi from 2023.7.22 to 2024.7.4. ([\#17404](https://github.com/element-hq/synapse/issues/17404))
+* Bump cryptography from 42.0.7 to 42.0.8. ([\#17382](https://github.com/element-hq/synapse/issues/17382))
+* Bump ijson from 3.2.3 to 3.3.0. ([\#17413](https://github.com/element-hq/synapse/issues/17413))
+* Bump log from 0.4.21 to 0.4.22. ([\#17384](https://github.com/element-hq/synapse/issues/17384))
+* Bump mypy-zope from 1.0.4 to 1.0.5. ([\#17414](https://github.com/element-hq/synapse/issues/17414))
+* Bump pillow from 10.3.0 to 10.4.0. ([\#17412](https://github.com/element-hq/synapse/issues/17412))
+* Bump pydantic from 2.7.1 to 2.8.2. ([\#17415](https://github.com/element-hq/synapse/issues/17415))
+* Bump ruff from 0.3.7 to 0.5.0. ([\#17381](https://github.com/element-hq/synapse/issues/17381))
+* Bump serde from 1.0.203 to 1.0.204. ([\#17409](https://github.com/element-hq/synapse/issues/17409))
+* Bump serde_json from 1.0.117 to 1.0.120. ([\#17385](https://github.com/element-hq/synapse/issues/17385), [\#17408](https://github.com/element-hq/synapse/issues/17408))
+* Bump types-setuptools from 69.5.0.20240423 to 70.1.0.20240627. ([\#17380](https://github.com/element-hq/synapse/issues/17380))
+
+# Synapse 1.110.0 (2024-07-03)
+
+No significant changes since 1.110.0rc3.
+
+
+
+
+# Synapse 1.110.0rc3 (2024-07-02)
+
+### Bugfixes
+
+- Fix bug where `/sync` requests could get blocked indefinitely after an upgrade from Synapse versions before v1.109.0. ([\#17386](https://github.com/element-hq/synapse/issues/17386), [\#17391](https://github.com/element-hq/synapse/issues/17391))
+
+### Internal Changes
+
+- Limit size of presence EDUs to 50 entries. ([\#17371](https://github.com/element-hq/synapse/issues/17371))
+- Fix building debian package for debian sid. ([\#17389](https://github.com/element-hq/synapse/issues/17389))
+
+
+
+
+# Synapse 1.110.0rc2 (2024-06-26)
+
+### Internal Changes
+
+- Fix uploading packages to PyPi. ([\#17363](https://github.com/element-hq/synapse/issues/17363))
+
+
+
+
+# Synapse 1.110.0rc1 (2024-06-26)
+
+### Features
+
+- Add initial implementation of an experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17187](https://github.com/element-hq/synapse/issues/17187))
+- Add experimental support for [MSC3823](https://github.com/matrix-org/matrix-spec-proposals/pull/3823) - Account suspension. ([\#17255](https://github.com/element-hq/synapse/issues/17255))
+- Improve ratelimiting in Synapse. ([\#17256](https://github.com/element-hq/synapse/issues/17256))
+- Add support for the unstable [MSC4151](https://github.com/matrix-org/matrix-spec-proposals/pull/4151) report room API. ([\#17270](https://github.com/element-hq/synapse/issues/17270), [\#17296](https://github.com/element-hq/synapse/issues/17296))
+- Filter for public and empty rooms added to Admin-API [List Room API](https://element-hq.github.io/synapse/latest/admin_api/rooms.html#list-room-api). ([\#17276](https://github.com/element-hq/synapse/issues/17276))
+- Add `is_dm` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17277](https://github.com/element-hq/synapse/issues/17277))
+- Add `is_encrypted` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17281](https://github.com/element-hq/synapse/issues/17281))
+- Include user membership in events served to clients, per [MSC4115](https://github.com/matrix-org/matrix-spec-proposals/pull/4115). ([\#17282](https://github.com/element-hq/synapse/issues/17282))
+- Do not require user-interactive authentication for uploading cross-signing keys for the first time, per [MSC3967](https://github.com/matrix-org/matrix-spec-proposals/pull/3967). ([\#17284](https://github.com/element-hq/synapse/issues/17284))
+- Add `stream_ordering` sort to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17293](https://github.com/element-hq/synapse/issues/17293))
+- `register_new_matrix_user` now supports a --password-file flag, which
+  is useful for scripting. ([\#17294](https://github.com/element-hq/synapse/issues/17294))
+- `register_new_matrix_user` now supports a --exists-ok flag to allow registration of users that already exist in the database.
+  This is useful for scripts that bootstrap user accounts with initial passwords. ([\#17304](https://github.com/element-hq/synapse/issues/17304))
+- Add support for via query parameter from [MSC4156](https://github.com/matrix-org/matrix-spec-proposals/pull/4156). ([\#17322](https://github.com/element-hq/synapse/issues/17322))
+- Add `is_invite` filtering to experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17335](https://github.com/element-hq/synapse/issues/17335))
+- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/blob/main/proposals/3916-authentication-for-media.md) by adding a federation /download endpoint. ([\#17350](https://github.com/element-hq/synapse/issues/17350))
+
+### Bugfixes
+
+- Fix searching for users with their exact localpart whose ID includes a hyphen. ([\#17254](https://github.com/element-hq/synapse/issues/17254))
+- Fix wrong retention policy being used when filtering events. ([\#17272](https://github.com/element-hq/synapse/issues/17272))
+- Fix bug where OTKs were not always included in `/sync` response when using workers. ([\#17275](https://github.com/element-hq/synapse/issues/17275))
+- Fix a long-standing bug where an invalid 'from' parameter to [`/notifications`](https://spec.matrix.org/v1.10/client-server-api/#get_matrixclientv3notifications) would result in an Internal Server Error. ([\#17283](https://github.com/element-hq/synapse/issues/17283))
+- Fix edge case in `/sync` returning the wrong the state when using sharded event persisters. ([\#17295](https://github.com/element-hq/synapse/issues/17295))
+- Add initial implementation of an experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync` endpoint. ([\#17301](https://github.com/element-hq/synapse/issues/17301))
+- Fix email notification subject when invited to a space. ([\#17336](https://github.com/element-hq/synapse/issues/17336))
+
+### Improved Documentation
+
+- Add missing quotes for example for `exclude_rooms_from_sync`. ([\#17308](https://github.com/element-hq/synapse/issues/17308))
+- Update header in the README to visually fix the the auto-generated table of contents. ([\#17329](https://github.com/element-hq/synapse/issues/17329))
+- Fix stale references to the Foundation's Security Disclosure Policy. ([\#17341](https://github.com/element-hq/synapse/issues/17341))
+- Add default values for `rc_invites.per_issuer` to docs. ([\#17347](https://github.com/element-hq/synapse/issues/17347))
+- Fix an error in the docs for `search_all_users` parameter under `user_directory`. ([\#17348](https://github.com/element-hq/synapse/issues/17348))
+
+### Internal Changes
+
+- Remove unused `expire_access_token` option in the Synapse Docker config file. Contributed by @AaronDewes. ([\#17198](https://github.com/element-hq/synapse/issues/17198))
+- Use fully-qualified `PersistedEventPosition` when returning `RoomsForUser` to facilitate proper comparisons and `RoomStreamToken` generation. ([\#17265](https://github.com/element-hq/synapse/issues/17265))
+- Add debug logging for when room keys are uploaded, including whether they are replacing other room keys. ([\#17266](https://github.com/element-hq/synapse/issues/17266))
+- Handle OTK uploads off master. ([\#17271](https://github.com/element-hq/synapse/issues/17271))
+- Don't try and resync devices for remote users whose servers are marked as down. ([\#17273](https://github.com/element-hq/synapse/issues/17273))
+- Re-organize Pydantic models and types used in handlers. ([\#17279](https://github.com/element-hq/synapse/issues/17279))
+- Expose the worker instance that persisted the event on `event.internal_metadata.instance_name`. ([\#17300](https://github.com/element-hq/synapse/issues/17300))
+- Update the README with Element branding, improve headers and fix the #synapse:matrix.org support room link rendering. ([\#17324](https://github.com/element-hq/synapse/issues/17324))
+- Change path of the experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync implementation to `/org.matrix.simplified_msc3575/sync` since our simplified API is slightly incompatible with what's in the current MSC. ([\#17331](https://github.com/element-hq/synapse/issues/17331))
+- Handle device lists notifications for large accounts more efficiently in worker mode. ([\#17333](https://github.com/element-hq/synapse/issues/17333), [\#17358](https://github.com/element-hq/synapse/issues/17358))
+- Do not block event sending/receiving while calculating large event auth chains. ([\#17338](https://github.com/element-hq/synapse/issues/17338))
+- Tidy up `parse_integer` docs and call sites to reflect the fact that they require non-negative integers by default, and bring `parse_integer_from_args` default in alignment. Contributed by Denis Kasak (@dkasak). ([\#17339](https://github.com/element-hq/synapse/issues/17339))
+
+
+
+### Updates to locked dependencies
+
+* Bump authlib from 1.3.0 to 1.3.1. ([\#17343](https://github.com/element-hq/synapse/issues/17343))
+* Bump dawidd6/action-download-artifact from 3.1.4 to 5. ([\#17289](https://github.com/element-hq/synapse/issues/17289))
+* Bump dawidd6/action-download-artifact from 5 to 6. ([\#17313](https://github.com/element-hq/synapse/issues/17313))
+* Bump docker/build-push-action from 5 to 6. ([\#17312](https://github.com/element-hq/synapse/issues/17312))
+* Bump jinja2 from 3.1.3 to 3.1.4. ([\#17287](https://github.com/element-hq/synapse/issues/17287))
+* Bump lazy_static from 1.4.0 to 1.5.0. ([\#17355](https://github.com/element-hq/synapse/issues/17355))
+* Bump msgpack from 1.0.7 to 1.0.8. ([\#17317](https://github.com/element-hq/synapse/issues/17317))
+* Bump netaddr from 1.2.1 to 1.3.0. ([\#17353](https://github.com/element-hq/synapse/issues/17353))
+* Bump packaging from 24.0 to 24.1. ([\#17352](https://github.com/element-hq/synapse/issues/17352))
+* Bump phonenumbers from 8.13.37 to 8.13.39. ([\#17315](https://github.com/element-hq/synapse/issues/17315))
+* Bump regex from 1.10.4 to 1.10.5. ([\#17290](https://github.com/element-hq/synapse/issues/17290))
+* Bump requests from 2.31.0 to 2.32.2. ([\#17345](https://github.com/element-hq/synapse/issues/17345))
+* Bump sentry-sdk from 2.1.1 to 2.3.1. ([\#17263](https://github.com/element-hq/synapse/issues/17263))
+* Bump sentry-sdk from 2.3.1 to 2.6.0. ([\#17351](https://github.com/element-hq/synapse/issues/17351))
+* Bump tornado from 6.4 to 6.4.1. ([\#17344](https://github.com/element-hq/synapse/issues/17344))
+* Bump mypy from 1.8.0 to 1.9.0. ([\#17297](https://github.com/element-hq/synapse/issues/17297))
+* Bump types-jsonschema from 4.21.0.20240311 to 4.22.0.20240610. ([\#17288](https://github.com/element-hq/synapse/issues/17288))
+* Bump types-netaddr from 1.2.0.20240219 to 1.3.0.20240530. ([\#17314](https://github.com/element-hq/synapse/issues/17314))
+* Bump types-pillow from 10.2.0.20240423 to 10.2.0.20240520. ([\#17285](https://github.com/element-hq/synapse/issues/17285))
+* Bump types-pyyaml from 6.0.12.12 to 6.0.12.20240311. ([\#17316](https://github.com/element-hq/synapse/issues/17316))
+* Bump typing-extensions from 4.11.0 to 4.12.2. ([\#17354](https://github.com/element-hq/synapse/issues/17354))
+* Bump urllib3 from 2.0.7 to 2.2.2. ([\#17346](https://github.com/element-hq/synapse/issues/17346))
+
+# Synapse 1.109.0 (2024-06-18)
+
+### Internal Changes
+
+- Fix the building of binary wheels for macOS by switching to macOS 12 CI runners. ([\#17319](https://github.com/element-hq/synapse/issues/17319))
+
+
+
+
+# Synapse 1.109.0rc3 (2024-06-17)
+
+### Bugfixes
+
+- When rolling back to a previous Synapse version and then forwards again to this release, don't require server operators to manually run SQL. ([\#17305](https://github.com/element-hq/synapse/issues/17305), [\#17309](https://github.com/element-hq/synapse/issues/17309))
+
+### Internal Changes
+
+- Use the release branch for sytest in release-branch PRs. ([\#17306](https://github.com/element-hq/synapse/issues/17306))
+
+
+
+
+# Synapse 1.109.0rc2 (2024-06-11)
+
+### Bugfixes
+
+- Fix bug where one-time-keys were not always included in `/sync` response when using workers. Introduced in v1.109.0rc1. ([\#17275](https://github.com/element-hq/synapse/issues/17275))
+- Fix bug where `/sync` could get stuck due to edge case in device lists handling. Introduced in v1.109.0rc1. ([\#17292](https://github.com/element-hq/synapse/issues/17292))
+
+
+
+
+# Synapse 1.109.0rc1 (2024-06-04)
+
+### Features
+
+- Add the ability to auto-accept invites on the behalf of users. See the [`auto_accept_invites`](https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#auto-accept-invites) config option for details. ([\#17147](https://github.com/element-hq/synapse/issues/17147))
+- Add experimental [MSC3575](https://github.com/matrix-org/matrix-spec-proposals/pull/3575) Sliding Sync `/sync/e2ee` endpoint for to-device messages and device encryption info. ([\#17167](https://github.com/element-hq/synapse/issues/17167))
+- Support [MSC3916](https://github.com/matrix-org/matrix-spec-proposals/issues/3916) by adding unstable media endpoints to `/_matrix/client`. ([\#17213](https://github.com/element-hq/synapse/issues/17213))
+- Add logging to tasks managed by the task scheduler, showing CPU and database usage. ([\#17219](https://github.com/element-hq/synapse/issues/17219))
+
+### Bugfixes
+
+- Fix deduplicating of membership events to not create unused state groups. ([\#17164](https://github.com/element-hq/synapse/issues/17164))
+- Fix bug where duplicate events could be sent down sync when using workers that are overloaded. ([\#17215](https://github.com/element-hq/synapse/issues/17215))
+- Ignore attempts to send to-device messages to bad users, to avoid log spam when we try to connect to the bad server. ([\#17240](https://github.com/element-hq/synapse/issues/17240))
+- Fix handling of duplicate concurrent uploading of device one-time-keys. ([\#17241](https://github.com/element-hq/synapse/issues/17241))
+- Fix reporting of default tags to Sentry, such as worker name. Broke in v1.108.0. ([\#17251](https://github.com/element-hq/synapse/issues/17251))
+- Fix bug where typing updates would not be sent when using workers after a restart. ([\#17252](https://github.com/element-hq/synapse/issues/17252))
+
+### Improved Documentation
+
+- Update the LemonLDAP documentation to say that claims should be explicitly included in the returned `id_token`, as Synapse won't request them. ([\#17204](https://github.com/element-hq/synapse/issues/17204))
+
+### Internal Changes
+
+- Improve DB usage when fetching related events. ([\#17083](https://github.com/element-hq/synapse/issues/17083))
+- Log exceptions when failing to auto-join new user according to the `auto_join_rooms` option. ([\#17176](https://github.com/element-hq/synapse/issues/17176))
+- Reduce work of calculating outbound device lists updates. ([\#17211](https://github.com/element-hq/synapse/issues/17211))
+- Improve performance of calculating device lists changes in `/sync`. ([\#17216](https://github.com/element-hq/synapse/issues/17216))
+- Move towards using `MultiWriterIdGenerator` everywhere. ([\#17226](https://github.com/element-hq/synapse/issues/17226))
+- Replaces all usages of `StreamIdGenerator` with `MultiWriterIdGenerator`. ([\#17229](https://github.com/element-hq/synapse/issues/17229))
+- Change the `allow_unsafe_locale` config option to also apply when setting up new databases. ([\#17238](https://github.com/element-hq/synapse/issues/17238))
+- Fix errors in logs about closing incorrect logging contexts when media gets rejected by a module. ([\#17239](https://github.com/element-hq/synapse/issues/17239), [\#17246](https://github.com/element-hq/synapse/issues/17246))
+- Clean out invalid destinations from `device_federation_outbox` table. ([\#17242](https://github.com/element-hq/synapse/issues/17242))
+- Stop logging errors when receiving invalid User IDs in key querys requests. ([\#17250](https://github.com/element-hq/synapse/issues/17250))
+
+
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.83 to 1.0.86. ([\#17220](https://github.com/element-hq/synapse/issues/17220))
+* Bump bcrypt from 4.1.2 to 4.1.3. ([\#17224](https://github.com/element-hq/synapse/issues/17224))
+* Bump lxml from 5.2.1 to 5.2.2. ([\#17261](https://github.com/element-hq/synapse/issues/17261))
+* Bump mypy-zope from 1.0.3 to 1.0.4. ([\#17262](https://github.com/element-hq/synapse/issues/17262))
+* Bump phonenumbers from 8.13.35 to 8.13.37. ([\#17235](https://github.com/element-hq/synapse/issues/17235))
+* Bump prometheus-client from 0.19.0 to 0.20.0. ([\#17233](https://github.com/element-hq/synapse/issues/17233))
+* Bump pyasn1 from 0.5.1 to 0.6.0. ([\#17223](https://github.com/element-hq/synapse/issues/17223))
+* Bump pyicu from 2.13 to 2.13.1. ([\#17236](https://github.com/element-hq/synapse/issues/17236))
+* Bump pyopenssl from 24.0.0 to 24.1.0. ([\#17234](https://github.com/element-hq/synapse/issues/17234))
+* Bump serde from 1.0.201 to 1.0.202. ([\#17221](https://github.com/element-hq/synapse/issues/17221))
+* Bump serde from 1.0.202 to 1.0.203. ([\#17232](https://github.com/element-hq/synapse/issues/17232))
+* Bump twine from 5.0.0 to 5.1.0. ([\#17225](https://github.com/element-hq/synapse/issues/17225))
+* Bump types-psycopg2 from 2.9.21.20240311 to 2.9.21.20240417. ([\#17222](https://github.com/element-hq/synapse/issues/17222))
+* Bump types-pyopenssl from 24.0.0.20240311 to 24.1.0.20240425. ([\#17260](https://github.com/element-hq/synapse/issues/17260))
+
+# Synapse 1.108.0 (2024-05-28)
+
+No significant changes since 1.108.0rc1.
+
+
+
+
+# Synapse 1.108.0rc1 (2024-05-21)
+
+### Features
+
+- Add a feature that allows clients to query the configured federation whitelist. Disabled by default. ([\#16848](https://github.com/element-hq/synapse/issues/16848), [\#17199](https://github.com/element-hq/synapse/issues/17199))
+- Add the ability to allow numeric user IDs with a specific prefix when in the CAS flow. Contributed by Aurélien Grimpard. ([\#17098](https://github.com/element-hq/synapse/issues/17098))
+
+### Bugfixes
+
+- Fix bug where push rules would be empty in `/sync` for some accounts. Introduced in v1.93.0. ([\#17142](https://github.com/element-hq/synapse/issues/17142))
+- Add support for optional whitespace around the Federation API's `Authorization` header's parameter commas. ([\#17145](https://github.com/element-hq/synapse/issues/17145))
+- Fix bug where disabling room publication prevented public rooms being created on workers. ([\#17177](https://github.com/element-hq/synapse/issues/17177), [\#17184](https://github.com/element-hq/synapse/issues/17184))
+
+### Improved Documentation
+
+- Document [`/v1/make_knock`](https://spec.matrix.org/v1.10/server-server-api/#get_matrixfederationv1make_knockroomiduserid) and [`/v1/send_knock/`](https://spec.matrix.org/v1.10/server-server-api/#put_matrixfederationv1send_knockroomideventid) federation endpoints as worker-compatible. ([\#17058](https://github.com/element-hq/synapse/issues/17058))
+- Update User Admin API with note about prefixing OIDC external_id providers. ([\#17139](https://github.com/element-hq/synapse/issues/17139))
+- Clarify the state of the created room when using the `autocreate_auto_join_room_preset` config option. ([\#17150](https://github.com/element-hq/synapse/issues/17150))
+- Update the Admin FAQ with the current libjemalloc version for latest Debian stable. Additionally update the name of the "push_rules" stream in the Workers documentation. ([\#17171](https://github.com/element-hq/synapse/issues/17171))
+
+### Internal Changes
+
+- Add note to reflect that [MSC3886](https://github.com/matrix-org/matrix-spec-proposals/pull/3886) is closed but will remain supported for some time. ([\#17151](https://github.com/element-hq/synapse/issues/17151))
+- Update dependency PyO3 to 0.21. ([\#17162](https://github.com/element-hq/synapse/issues/17162))
+- Fixes linter errors found in PR #17147. ([\#17166](https://github.com/element-hq/synapse/issues/17166))
+- Bump black from 24.2.0 to 24.4.2. ([\#17170](https://github.com/element-hq/synapse/issues/17170))
+- Cache literal sync filter validation for performance. ([\#17186](https://github.com/element-hq/synapse/issues/17186))
+- Improve performance by fixing a reactor pause. ([\#17192](https://github.com/element-hq/synapse/issues/17192))
+- Route `/make_knock` and `/send_knock` federation APIs to the federation reader worker in Complement test runs. ([\#17195](https://github.com/element-hq/synapse/issues/17195))
+- Prepare sync handler to be able to return different sync responses (`SyncVersion`). ([\#17200](https://github.com/element-hq/synapse/issues/17200))
+- Organize the sync cache key parameter outside of the sync config (separate concerns). ([\#17201](https://github.com/element-hq/synapse/issues/17201))
+- Refactor `SyncResultBuilder` assembly to its own function. ([\#17202](https://github.com/element-hq/synapse/issues/17202))
+- Rename to be obvious: `joined_rooms` -> `joined_room_ids`. ([\#17203](https://github.com/element-hq/synapse/issues/17203), [\#17208](https://github.com/element-hq/synapse/issues/17208))
+- Add a short pause when rate-limiting a request. ([\#17210](https://github.com/element-hq/synapse/issues/17210))
+
+
+
+### Updates to locked dependencies
+
+* Bump cryptography from 42.0.5 to 42.0.7. ([\#17180](https://github.com/element-hq/synapse/issues/17180))
+* Bump gitpython from 3.1.41 to 3.1.43. ([\#17181](https://github.com/element-hq/synapse/issues/17181))
+* Bump immutabledict from 4.1.0 to 4.2.0. ([\#17179](https://github.com/element-hq/synapse/issues/17179))
+* Bump sentry-sdk from 1.40.3 to 2.1.1. ([\#17178](https://github.com/element-hq/synapse/issues/17178))
+* Bump serde from 1.0.200 to 1.0.201. ([\#17183](https://github.com/element-hq/synapse/issues/17183))
+* Bump serde_json from 1.0.116 to 1.0.117. ([\#17182](https://github.com/element-hq/synapse/issues/17182))
+
+Synapse 1.107.0 (2024-05-14)
+============================
+
+No significant changes since 1.107.0rc1.
+
+
+# Synapse 1.107.0rc1 (2024-05-07)
+
+### Features
+
+- Add preliminary support for [MSC3823: Account Suspension](https://github.com/matrix-org/matrix-spec-proposals/pull/3823). ([\#17051](https://github.com/element-hq/synapse/issues/17051))
+- Declare support for [Matrix v1.10](https://matrix.org/blog/2024/03/22/matrix-v1.10-release/). Contributed by @clokep. ([\#17082](https://github.com/element-hq/synapse/issues/17082))
+- Add support for [MSC4115: membership metadata on events](https://github.com/matrix-org/matrix-spec-proposals/pull/4115). ([\#17104](https://github.com/element-hq/synapse/issues/17104), [\#17137](https://github.com/element-hq/synapse/issues/17137))
+
+### Bugfixes
+
+- Fixed search feature of Element Android on homesevers using SQLite by returning search terms as search highlights. ([\#17000](https://github.com/element-hq/synapse/issues/17000))
+- Fixes a bug introduced in v1.52.0 where the `destination` query parameter for the  [Destination Rooms Admin API](https://element-hq.github.io/synapse/v1.105/usage/administration/admin_api/federation.html#destination-rooms) failed to actually filter returned rooms. ([\#17077](https://github.com/element-hq/synapse/issues/17077))
+- For MSC3266 room summaries, support queries at the recommended endpoint of `/_matrix/client/unstable/im.nheko.summary/summary/{roomIdOrAlias}`. The existing endpoint of `/_matrix/client/unstable/im.nheko.summary/rooms/{roomIdOrAlias}/summary` is deprecated. ([\#17078](https://github.com/element-hq/synapse/issues/17078))
+- Apply user email & picture during OIDC registration if present & selected. ([\#17120](https://github.com/element-hq/synapse/issues/17120))
+- Improve error message for cross signing reset with [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) enabled. ([\#17121](https://github.com/element-hq/synapse/issues/17121))
+- Fix a bug which meant that to-device messages received over federation could be dropped when the server was under load or networking problems caused problems between Synapse processes or the database. ([\#17127](https://github.com/element-hq/synapse/issues/17127))
+- Fix bug where `StreamChangeCache` would not respect configured cache factors. ([\#17152](https://github.com/element-hq/synapse/issues/17152))
+
+### Updates to the Docker image
+
+- Correct licensing metadata on Docker image. ([\#17141](https://github.com/element-hq/synapse/issues/17141))
+
+### Improved Documentation
+
+- Update the `event_cache_size` and `global_factor` configuration options' documentation. ([\#17071](https://github.com/element-hq/synapse/issues/17071))
+- Remove broken sphinx docs. ([\#17073](https://github.com/element-hq/synapse/issues/17073), [\#17148](https://github.com/element-hq/synapse/issues/17148))
+- Add RuntimeDirectory to example matrix-synapse.service systemd unit. ([\#17084](https://github.com/element-hq/synapse/issues/17084))
+- Fix various small typos throughout the docs. ([\#17114](https://github.com/element-hq/synapse/issues/17114))
+- Update enable_notifs configuration documentation. ([\#17116](https://github.com/element-hq/synapse/issues/17116))
+- Update the Upgrade Notes with the latest minimum supported Rust version of 1.66.0. Contributed by @jahway603. ([\#17140](https://github.com/element-hq/synapse/issues/17140))
+
+### Internal Changes
+
+- Enable [MSC3266](https://github.com/matrix-org/matrix-spec-proposals/pull/3266) by default in the Synapse Complement image. ([\#17105](https://github.com/element-hq/synapse/issues/17105))
+- Add optimisation to `StreamChangeCache.get_entities_changed(..)`. ([\#17130](https://github.com/element-hq/synapse/issues/17130))
+
+
+
+### Updates to locked dependencies
+
+* Bump furo from 2024.1.29 to 2024.4.27. ([\#17133](https://github.com/element-hq/synapse/issues/17133))
+* Bump idna from 3.6 to 3.7. ([\#17136](https://github.com/element-hq/synapse/issues/17136))
+* Bump jsonschema from 4.21.1 to 4.22.0. ([\#17157](https://github.com/element-hq/synapse/issues/17157))
+* Bump lxml from 5.1.0 to 5.2.1. ([\#17158](https://github.com/element-hq/synapse/issues/17158))
+* Bump phonenumbers from 8.13.29 to 8.13.35. ([\#17106](https://github.com/element-hq/synapse/issues/17106))
+- Bump pillow from 10.2.0 to 10.3.0. ([\#17146](https://github.com/element-hq/synapse/issues/17146))
+* Bump pydantic from 2.6.4 to 2.7.0. ([\#17107](https://github.com/element-hq/synapse/issues/17107))
+* Bump pydantic from 2.7.0 to 2.7.1. ([\#17160](https://github.com/element-hq/synapse/issues/17160))
+* Bump pyicu from 2.12 to 2.13. ([\#17109](https://github.com/element-hq/synapse/issues/17109))
+* Bump serde from 1.0.197 to 1.0.198. ([\#17111](https://github.com/element-hq/synapse/issues/17111))
+* Bump serde from 1.0.198 to 1.0.199. ([\#17132](https://github.com/element-hq/synapse/issues/17132))
+* Bump serde from 1.0.199 to 1.0.200. ([\#17161](https://github.com/element-hq/synapse/issues/17161))
+* Bump serde_json from 1.0.115 to 1.0.116. ([\#17112](https://github.com/element-hq/synapse/issues/17112))
+- Update `tornado` Python dependency from 6.2 to 6.4. ([\#17131](https://github.com/element-hq/synapse/issues/17131))
+* Bump twisted from 23.10.0 to 24.3.0. ([\#17135](https://github.com/element-hq/synapse/issues/17135))
+* Bump types-bleach from 6.1.0.1 to 6.1.0.20240331. ([\#17110](https://github.com/element-hq/synapse/issues/17110))
+* Bump types-pillow from 10.2.0.20240415 to 10.2.0.20240423. ([\#17159](https://github.com/element-hq/synapse/issues/17159))
+* Bump types-setuptools from 69.0.0.20240125 to 69.5.0.20240423. ([\#17134](https://github.com/element-hq/synapse/issues/17134))
+
+# Synapse 1.106.0 (2024-04-30)
+
+No significant changes since 1.106.0rc1.
+
+
+
+
+# Synapse 1.106.0rc1 (2024-04-25)
+
+### Features
+
+- Send an email if the address is already bound to an user account. ([\#16819](https://github.com/element-hq/synapse/issues/16819))
+- Implement the rendezvous mechanism described by [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/issues/4108). ([\#17056](https://github.com/element-hq/synapse/issues/17056))
+- Support delegating the rendezvous mechanism described [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/issues/4108) to an external implementation. ([\#17086](https://github.com/element-hq/synapse/issues/17086))
+
+### Bugfixes
+
+- Add validation to ensure that the `limit` parameter on `/publicRooms` is non-negative. ([\#16920](https://github.com/element-hq/synapse/issues/16920))
+- Return `400 M_NOT_JSON` upon receiving invalid JSON in query parameters across various client and admin endpoints, rather than an internal server error. ([\#16923](https://github.com/element-hq/synapse/issues/16923))
+- Make the CSAPI endpoint `/keys/device_signing/upload` idempotent. ([\#16943](https://github.com/element-hq/synapse/issues/16943))
+- Redact membership events if the user requested erasure upon deactivating. ([\#17076](https://github.com/element-hq/synapse/issues/17076))
+
+### Improved Documentation
+
+- Add a prompt in the contributing guide to manually configure icu4c. ([\#17069](https://github.com/element-hq/synapse/issues/17069))
+- Clarify what part of message retention is still experimental. ([\#17099](https://github.com/element-hq/synapse/issues/17099))
+
+### Internal Changes
+
+- Use new receipts column to optimise receipt and push action SQL queries. Contributed by Nick @ Beeper (@fizzadar). ([\#17032](https://github.com/element-hq/synapse/issues/17032), [\#17096](https://github.com/element-hq/synapse/issues/17096))
+- Fix mypy with latest Twisted release. ([\#17036](https://github.com/element-hq/synapse/issues/17036))
+- Bump minimum supported Rust version to 1.66.0. ([\#17079](https://github.com/element-hq/synapse/issues/17079))
+- Add helpers to transform Twisted requests to Rust http Requests/Responses. ([\#17081](https://github.com/element-hq/synapse/issues/17081))
+- Fix type annotation for `visited_chains` after `mypy` upgrade. ([\#17125](https://github.com/element-hq/synapse/issues/17125))
+
+
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.81 to 1.0.82. ([\#17095](https://github.com/element-hq/synapse/issues/17095))
+* Bump peaceiris/actions-gh-pages from 3.9.3 to 4.0.0. ([\#17087](https://github.com/element-hq/synapse/issues/17087))
+* Bump peaceiris/actions-mdbook from 1.2.0 to 2.0.0. ([\#17089](https://github.com/element-hq/synapse/issues/17089))
+* Bump pyasn1-modules from 0.3.0 to 0.4.0. ([\#17093](https://github.com/element-hq/synapse/issues/17093))
+* Bump pygithub from 2.2.0 to 2.3.0. ([\#17092](https://github.com/element-hq/synapse/issues/17092))
+* Bump ruff from 0.3.5 to 0.3.7. ([\#17094](https://github.com/element-hq/synapse/issues/17094))
+* Bump sigstore/cosign-installer from 3.4.0 to 3.5.0. ([\#17088](https://github.com/element-hq/synapse/issues/17088))
+* Bump twine from 4.0.2 to 5.0.0. ([\#17091](https://github.com/element-hq/synapse/issues/17091))
+* Bump types-pillow from 10.2.0.20240406 to 10.2.0.20240415. ([\#17090](https://github.com/element-hq/synapse/issues/17090))
+
+# Synapse 1.105.1 (2024-04-23)
+
+## Security advisory
+
+The following issues are fixed in 1.105.1.
+
+- [GHSA-3h7q-rfh9-xm4v](https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v) / [CVE-2024-31208](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-31208) — High Severity
+
+  Weakness in auth chain indexing allows DoS from remote room members through disk fill and high CPU usage.
+
+See the advisories for more details. If you have any questions, email security@element.io.
+
+
+
+# Synapse 1.105.0 (2024-04-16)
+
+No significant changes since 1.105.0rc1.
+
+
+
+
+# Synapse 1.105.0rc1 (2024-04-11)
+
+### Features
+
+- Stabilize support for [MSC4010](https://github.com/matrix-org/matrix-spec-proposals/pull/4010) which clarifies the interaction of push rules and account data. Contributed by @clokep. ([\#17022](https://github.com/element-hq/synapse/issues/17022))
+- Stabilize support for [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981): `/relations` recursion. Contributed by @clokep. ([\#17023](https://github.com/element-hq/synapse/issues/17023))
+- Add support for moving `/pushrules` off of main process. ([\#17037](https://github.com/element-hq/synapse/issues/17037), [\#17038](https://github.com/element-hq/synapse/issues/17038))
+
+### Bugfixes
+
+- Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations. ([\#16930](https://github.com/element-hq/synapse/issues/16930), [\#16932](https://github.com/element-hq/synapse/issues/16932), [\#16942](https://github.com/element-hq/synapse/issues/16942), [\#17064](https://github.com/element-hq/synapse/issues/17064), [\#17065](https://github.com/element-hq/synapse/issues/17065), [\#17066](https://github.com/element-hq/synapse/issues/17066))
+- Fix server notice rooms not always being created as unencrypted rooms, even when `encryption_enabled_by_default_for_room_type` is in use (server notices are always unencrypted). ([\#17033](https://github.com/element-hq/synapse/issues/17033))
+- Fix the `.m.rule.encrypted_room_one_to_one` and `.m.rule.room_one_to_one` default underride push rules being in the wrong order. Contributed by @Sumpy1. ([\#17043](https://github.com/element-hq/synapse/issues/17043))
+
+### Internal Changes
+
+- Refactor auth chain fetching to reduce duplication. ([\#17044](https://github.com/element-hq/synapse/issues/17044))
+- Improve database performance by adding a missing index to `access_tokens.refresh_token_id`. ([\#17045](https://github.com/element-hq/synapse/issues/17045), [\#17054](https://github.com/element-hq/synapse/issues/17054))
+- Improve database performance by reducing number of receipts fetched when sending push notifications. ([\#17049](https://github.com/element-hq/synapse/issues/17049))
+
+
+
+### Updates to locked dependencies
+
+* Bump packaging from 23.2 to 24.0. ([\#17027](https://github.com/element-hq/synapse/issues/17027))
+* Bump regex from 1.10.3 to 1.10.4. ([\#17028](https://github.com/element-hq/synapse/issues/17028))
+* Bump ruff from 0.3.2 to 0.3.5. ([\#17060](https://github.com/element-hq/synapse/issues/17060))
+* Bump serde_json from 1.0.114 to 1.0.115. ([\#17041](https://github.com/element-hq/synapse/issues/17041))
+* Bump types-pillow from 10.2.0.20240125 to 10.2.0.20240406. ([\#17061](https://github.com/element-hq/synapse/issues/17061))
+* Bump types-requests from 2.31.0.20240125 to 2.31.0.20240406. ([\#17063](https://github.com/element-hq/synapse/issues/17063))
+* Bump typing-extensions from 4.9.0 to 4.11.0. ([\#17062](https://github.com/element-hq/synapse/issues/17062))
+
+# Synapse 1.104.0 (2024-04-02)
+
+### Bugfixes
+
+- Fix regression when using OIDC provider. Introduced in v1.104.0rc1. ([\#17031](https://github.com/element-hq/synapse/issues/17031))
+
+
+# Synapse 1.104.0rc1 (2024-03-26)
+
+### Features
+
+- Add an OIDC config to specify extra parameters for the authorization grant URL. IT can be useful to pass an ACR value for example. ([\#16971](https://github.com/element-hq/synapse/issues/16971))
+- Add support for OIDC provider returning JWT. ([\#16972](https://github.com/element-hq/synapse/issues/16972), [\#17031](https://github.com/element-hq/synapse/issues/17031))
+
+### Bugfixes
+
+- Fix a bug which meant that, under certain circumstances, we might never retry sending events or to-device messages over federation after a failure. ([\#16925](https://github.com/element-hq/synapse/issues/16925))
+- Fix various long-standing bugs which could cause incorrect state to be returned from `/sync` in certain situations. ([\#16949](https://github.com/element-hq/synapse/issues/16949))
+- Fix case in which `m.fully_read` marker would not get updated. Contributed by @SpiritCroc. ([\#16990](https://github.com/element-hq/synapse/issues/16990))
+- Fix bug which did not retract a user's pending knocks at rooms when their account was deactivated. Contributed by @hanadi92. ([\#17010](https://github.com/element-hq/synapse/issues/17010))
+
+### Updates to the Docker image
+
+- Updated `start.py` to generate config using the correct user ID when running as root (fixes [\#16824](https://github.com/element-hq/synapse/issues/16824), [\#15202](https://github.com/element-hq/synapse/issues/15202)). ([\#16978](https://github.com/element-hq/synapse/issues/16978))
+
+### Improved Documentation
+
+- Add a query to force a refresh of a remote user's device list to the "Useful SQL for Admins" documentation page. ([\#16892](https://github.com/element-hq/synapse/issues/16892))
+- Minor grammatical corrections to the upgrade documentation. ([\#16965](https://github.com/element-hq/synapse/issues/16965))
+- Fix the sort order for the documentation version picker, so that newer releases appear above older ones. ([\#16966](https://github.com/element-hq/synapse/issues/16966))
+- Remove recommendation for a specific poetry version from contributing guide. ([\#17002](https://github.com/element-hq/synapse/issues/17002))
+
+### Internal Changes
+
+- Improve lock performance when a lot of locks are all waiting for a single lock to be released. ([\#16840](https://github.com/element-hq/synapse/issues/16840))
+- Update power level default for public rooms. ([\#16907](https://github.com/element-hq/synapse/issues/16907))
+- Improve event validation. ([\#16908](https://github.com/element-hq/synapse/issues/16908))
+- Multi-worker-docker-container: disable log buffering. ([\#16919](https://github.com/element-hq/synapse/issues/16919))
+- Refactor state delta calculation in `/sync` handler. ([\#16929](https://github.com/element-hq/synapse/issues/16929))
+- Clarify docs for some room state functions. ([\#16950](https://github.com/element-hq/synapse/issues/16950))
+- Specify IP subnets in canonical form. ([\#16953](https://github.com/element-hq/synapse/issues/16953))
+- As done for SAML mapping provider, let's pass the module API to the OIDC one so the mapper can do more logic in its code. ([\#16974](https://github.com/element-hq/synapse/issues/16974))
+- Allow containers building on top of Synapse's Complement container is use the included PostgreSQL cluster. ([\#16985](https://github.com/element-hq/synapse/issues/16985))
+- Raise poetry-core version cap to 1.9.0. ([\#16986](https://github.com/element-hq/synapse/issues/16986))
+- Patch the db conn pool sooner in tests. ([\#17017](https://github.com/element-hq/synapse/issues/17017))
+
+
+
+### Updates to locked dependencies
+
+* Bump anyhow from 1.0.80 to 1.0.81. ([\#17009](https://github.com/element-hq/synapse/issues/17009))
+* Bump black from 23.10.1 to 24.2.0. ([\#16936](https://github.com/element-hq/synapse/issues/16936))
+* Bump cryptography from 41.0.7 to 42.0.5. ([\#16958](https://github.com/element-hq/synapse/issues/16958))
+* Bump dawidd6/action-download-artifact from 3.1.1 to 3.1.2. ([\#16960](https://github.com/element-hq/synapse/issues/16960))
+* Bump dawidd6/action-download-artifact from 3.1.2 to 3.1.4. ([\#17008](https://github.com/element-hq/synapse/issues/17008))
+* Bump jinja2 from 3.1.2 to 3.1.3. ([\#17005](https://github.com/element-hq/synapse/issues/17005))
+* Bump log from 0.4.20 to 0.4.21. ([\#16977](https://github.com/element-hq/synapse/issues/16977))
+* Bump mypy from 1.5.1 to 1.8.0. ([\#16901](https://github.com/element-hq/synapse/issues/16901))
+* Bump netaddr from 0.9.0 to 1.2.1. ([\#17006](https://github.com/element-hq/synapse/issues/17006))
+* Bump pydantic from 2.6.0 to 2.6.4. ([\#17004](https://github.com/element-hq/synapse/issues/17004))
+* Bump pyo3 from 0.20.2 to 0.20.3. ([\#16962](https://github.com/element-hq/synapse/issues/16962))
+* Bump ruff from 0.1.14 to 0.3.2. ([\#16994](https://github.com/element-hq/synapse/issues/16994))
+* Bump serde from 1.0.196 to 1.0.197. ([\#16963](https://github.com/element-hq/synapse/issues/16963))
+* Bump serde_json from 1.0.113 to 1.0.114. ([\#16961](https://github.com/element-hq/synapse/issues/16961))
+* Bump types-jsonschema from 4.21.0.20240118 to 4.21.0.20240311. ([\#17007](https://github.com/element-hq/synapse/issues/17007))
+* Bump types-psycopg2 from 2.9.21.16 to 2.9.21.20240311. ([\#16995](https://github.com/element-hq/synapse/issues/16995))
+* Bump types-pyopenssl from 23.3.0.0 to 24.0.0.20240311. ([\#17003](https://github.com/element-hq/synapse/issues/17003))
+
+# Synapse 1.103.0 (2024-03-19)
+
+No significant changes since 1.103.0rc1.
+
+
+
+
+# Synapse 1.103.0rc1 (2024-03-12)
+
+### Features
+
+- Add a new [List Accounts v3](https://element-hq.github.io/synapse/v1.103/admin_api/user_admin_api.html#list-accounts-v3) Admin API with improved deactivated user filtering capabilities. ([\#16874](https://github.com/element-hq/synapse/issues/16874))
+- Include `Retry-After` header by default per [MSC4041](https://github.com/matrix-org/matrix-spec-proposals/pull/4041). Contributed by @clokep. ([\#16947](https://github.com/element-hq/synapse/issues/16947))
+
+### Bugfixes
+
+- Fix joining remote rooms when a module uses the `on_new_event` callback. This callback may now pass partial state events instead of the full state for remote rooms. Introduced in v1.76.0. ([\#16973](https://github.com/element-hq/synapse/issues/16973))
+- Fix performance issue when joining very large rooms that can cause the server to lock up. Introduced in v1.100.0. Contributed by @ggogel. ([\#16968](https://github.com/element-hq/synapse/issues/16968))
+
+### Improved Documentation
+
+- Add HAProxy example for single port operation to reverse proxy documentation. Contributed by Georg Pfuetzenreuter (@tacerus). ([\#16768](https://github.com/element-hq/synapse/issues/16768))
+- Improve the documentation around running Complement tests with new configuration parameters. ([\#16946](https://github.com/element-hq/synapse/issues/16946))
+- Add docs on upgrading from a very old version. ([\#16951](https://github.com/element-hq/synapse/issues/16951))
+
+
+### Updates to locked dependencies
+
+* Bump JasonEtco/create-an-issue from 2.9.1 to 2.9.2. ([\#16934](https://github.com/element-hq/synapse/issues/16934))
+* Bump anyhow from 1.0.79 to 1.0.80. ([\#16935](https://github.com/element-hq/synapse/issues/16935))
+* Bump dawidd6/action-download-artifact from 3.0.0 to 3.1.1. ([\#16933](https://github.com/element-hq/synapse/issues/16933))
+* Bump furo from 2023.9.10 to 2024.1.29. ([\#16939](https://github.com/element-hq/synapse/issues/16939))
+* Bump pyopenssl from 23.3.0 to 24.0.0. ([\#16937](https://github.com/element-hq/synapse/issues/16937))
+* Bump types-netaddr from 0.10.0.20240106 to 1.2.0.20240219. ([\#16938](https://github.com/element-hq/synapse/issues/16938))
+
+
+# Synapse 1.102.0 (2024-03-05)
+
+### Bugfixes
+
+- Revert https://github.com/element-hq/synapse/pull/16756, which caused incorrect notification counts on mobile clients since v1.100.0. ([\#16979](https://github.com/element-hq/synapse/issues/16979))
+
+
+# Synapse 1.102.0rc1 (2024-02-20)
+
+### Features
+
+- A metric was added for emails sent by Synapse, broken down by type: `synapse_emails_sent_total`. Contributed by Remi Rampin. ([\#16881](https://github.com/element-hq/synapse/issues/16881))
+
+### Bugfixes
+
+- Do not send multiple concurrent requests for keys for the same server. ([\#16894](https://github.com/element-hq/synapse/issues/16894))
+- Fix performance issue when joining very large rooms that can cause the server to lock up. Introduced in v1.100.0. ([\#16903](https://github.com/element-hq/synapse/issues/16903))
+- Always prefer unthreaded receipt when >1 exist ([MSC4102](https://github.com/matrix-org/matrix-spec-proposals/pull/4102)). ([\#16927](https://github.com/element-hq/synapse/issues/16927))
+
+### Improved Documentation
+
+- Fix a small typo in the Rooms section of the Admin API documentation. Contributed by @RainerZufall187. ([\#16857](https://github.com/element-hq/synapse/issues/16857))
+
+### Internal Changes
+
+- Don't invalidate the entire event cache when we purge history. ([\#16905](https://github.com/element-hq/synapse/issues/16905))
+- Add experimental config option to not send device list updates for specific users. ([\#16909](https://github.com/element-hq/synapse/issues/16909))
+- Fix incorrect docker hub link in release script. ([\#16910](https://github.com/element-hq/synapse/issues/16910))
+
+
+
+### Updates to locked dependencies
+
+* Bump attrs from 23.1.0 to 23.2.0. ([\#16899](https://github.com/element-hq/synapse/issues/16899))
+* Bump bcrypt from 4.0.1 to 4.1.2. ([\#16900](https://github.com/element-hq/synapse/issues/16900))
+* Bump pygithub from 2.1.1 to 2.2.0. ([\#16902](https://github.com/element-hq/synapse/issues/16902))
+* Bump sentry-sdk from 1.40.0 to 1.40.3. ([\#16898](https://github.com/element-hq/synapse/issues/16898))
+
+# Synapse 1.101.0 (2024-02-13)
+
+### Bugfixes
+
+- Fix performance regression when fetching auth chains from the DB. Introduced in v1.100.0. ([\#16893](https://github.com/element-hq/synapse/issues/16893))
+
+
+
+
+# Synapse 1.101.0rc1 (2024-02-06)
+
+### Improved Documentation
+
+- Fix broken links in the documentation. ([\#16853](https://github.com/element-hq/synapse/issues/16853))
+- Update MacOS installation instructions to mention that libicu is optional. ([\#16854](https://github.com/element-hq/synapse/issues/16854))
+- The version picker now correctly lists versions after `v1.98.0`. ([\#16880](https://github.com/element-hq/synapse/issues/16880))
+
+### Internal Changes
+
+- Add support for stabilised [MSC3981](https://github.com/matrix-org/matrix-spec-proposals/pull/3981) that adds a `recurse` parameter on the `/relations` API. ([\#16842](https://github.com/element-hq/synapse/issues/16842))
+
+
+
+### Updates to locked dependencies
+
+* Bump dorny/paths-filter from 2 to 3. ([\#16869](https://github.com/element-hq/synapse/issues/16869))
+* Bump gitpython from 3.1.40 to 3.1.41. ([\#16850](https://github.com/element-hq/synapse/issues/16850))
+* Bump hiredis from 2.2.3 to 2.3.2. ([\#16862](https://github.com/element-hq/synapse/issues/16862))
+* Bump jsonschema from 4.20.0 to 4.21.1. ([\#16887](https://github.com/element-hq/synapse/issues/16887))
+* Bump lxml-stubs from 0.4.0 to 0.5.1. ([\#16885](https://github.com/element-hq/synapse/issues/16885))
+* Bump mypy-zope from 1.0.1 to 1.0.3. ([\#16865](https://github.com/element-hq/synapse/issues/16865))
+* Bump phonenumbers from 8.13.26 to 8.13.29. ([\#16868](https://github.com/element-hq/synapse/issues/16868))
+* Bump pydantic from 2.5.3 to 2.6.0. ([\#16888](https://github.com/element-hq/synapse/issues/16888))
+* Bump sentry-sdk from 1.39.1 to 1.40.0. ([\#16889](https://github.com/element-hq/synapse/issues/16889))
+* Bump serde from 1.0.195 to 1.0.196. ([\#16867](https://github.com/element-hq/synapse/issues/16867))
+* Bump serde_json from 1.0.111 to 1.0.113. ([\#16866](https://github.com/element-hq/synapse/issues/16866))
+* Bump sigstore/cosign-installer from 3.3.0 to 3.4.0. ([\#16890](https://github.com/element-hq/synapse/issues/16890))
+* Bump types-pillow from 10.1.0.2 to 10.2.0.20240125. ([\#16864](https://github.com/element-hq/synapse/issues/16864))
+* Bump types-requests from 2.31.0.10 to 2.31.0.20240125. ([\#16886](https://github.com/element-hq/synapse/issues/16886))
+* Bump types-setuptools from 69.0.0.0 to 69.0.0.20240125. ([\#16863](https://github.com/element-hq/synapse/issues/16863))
+
+# Synapse 1.100.0 (2024-01-30)
+
+No significant changes since 1.100.0rc3.
+
+
+
+
+# Synapse 1.100.0rc3 (2024-01-24)
+
+### Bugfixes
+
+- Fix database performance regression due to changing Postgres table statistics. Introduced in v1.100.0rc1. ([\#16849](https://github.com/element-hq/synapse/issues/16849))
+
+
+
+
+# Synapse 1.100.0rc2 (2024-01-24)
+
+This version is the same as 1.100.0rc1 but with fixes to the release process.
+
+### Internal Changes
+
+- Downgrade the `download-artifact` and `upload-artifact` actions to v3 due to breaking changes. ([\#16847](https://github.com/element-hq/synapse/issues/16847))
+
+
+# Synapse 1.100.0rc1 (2024-01-23)
+
+*This version was never released to PyPI or the Debian repository due to failures in the automatic part of the release process.*
+
+### Features
+
+- Advertise experimental support for [MSC4028](https://github.com/matrix-org/matrix-spec-proposals/pull/4028) through `/_matrix/clients/versions` if enabled. Contributed by @hanadi92. ([\#16787](https://github.com/element-hq/synapse/issues/16787))
+
+### Bugfixes
+
+- Handle wildcard type filters properly for room messages endpoint. Contributed by Mo Balaa. ([\#14984](https://github.com/element-hq/synapse/issues/14984))
+
+### Improved Documentation
+
+- Add a link to the "Request log format" explainer on the "Logging sample config" documentation page. ([\#16778](https://github.com/element-hq/synapse/issues/16778))
+- Fix broken links in issue templates and documentation. ([\#16810](https://github.com/element-hq/synapse/issues/16810))
+- NGINX listen http2 deprecation in documentation template for reverse proxy. ([\#16831](https://github.com/element-hq/synapse/issues/16831))
+
+### Internal Changes
+
+- Faster partial join to room with complex auth graph. ([\#7](https://github.com/element-hq/synapse/issues/7))
+- Improve DB performance of calculating badge counts for push. ([\#16756](https://github.com/element-hq/synapse/issues/16756))
+- Split up deleting devices into batches. ([\#16766](https://github.com/element-hq/synapse/issues/16766))
+- Remove CI check for sign-off as we require a CLA signature instead. ([\#16776](https://github.com/element-hq/synapse/issues/16776))
+- Ensure CI fails when linting fails to make sure auto-merge does the correct thing. ([\#16781](https://github.com/element-hq/synapse/issues/16781))
+- Faster load recents for sync by reducing amount of state pulled out. ([\#16783](https://github.com/element-hq/synapse/issues/16783))
+- Reduce amount of state pulled out when querying federation hierachy. ([\#16785](https://github.com/element-hq/synapse/issues/16785))
+- Pull less state out of the DB when we retry fetching old events during backfill. ([\#16788](https://github.com/element-hq/synapse/issues/16788))
+- Optimize query for fetching to-device messages in `/sync`. ([\#16805](https://github.com/element-hq/synapse/issues/16805))
+- Reject OIDC config when `client_secret` isn't specified, but the auth method requires one. ([\#16806](https://github.com/element-hq/synapse/issues/16806))
+- Allow room creation but not publishing to continue if room publication rules are violated when creating
+  a new room. ([\#16811](https://github.com/element-hq/synapse/issues/16811))
+- Bump minimum supported Rust version to 1.65.0. ([\#16818](https://github.com/element-hq/synapse/issues/16818))
+- Fixup copyright lines in file headers after the licensing change. ([\#16820](https://github.com/element-hq/synapse/issues/16820))
+- Add a `--generate-only` option to the internal configuration/launch script for Complement. ([\#16828](https://github.com/element-hq/synapse/issues/16828))
+- Preparatory work for tweaking performance of auth chain lookups. ([\#16833](https://github.com/element-hq/synapse/issues/16833))
+- Speed up e2e device keys queries for bot accounts. ([\#16841](https://github.com/element-hq/synapse/issues/16841))
+
+### Updates to locked dependencies
+
+* Bump actions/cache from 3 to 4. ([\#16832](https://github.com/element-hq/synapse/issues/16832))
+* Bump actions/download-artifact from 3 to 4. ([\#16795](https://github.com/element-hq/synapse/issues/16795))
+* Bump actions/upload-artifact from 3 to 4. ([\#16796](https://github.com/element-hq/synapse/issues/16796))
+* Bump anyhow from 1.0.75 to 1.0.79. ([\#16789](https://github.com/element-hq/synapse/issues/16789))
+* Bump authlib from 1.2.1 to 1.3.0. ([\#16801](https://github.com/element-hq/synapse/issues/16801))
+* Bump dawidd6/action-download-artifact from 2.28.0 to 3.0.0. ([\#16794](https://github.com/element-hq/synapse/issues/16794))
+* Bump immutabledict from 4.0.0 to 4.1.0. ([\#16812](https://github.com/element-hq/synapse/issues/16812))
+* Bump isort from 5.13.1 to 5.13.2. ([\#16835](https://github.com/element-hq/synapse/issues/16835))
+* Bump lxml from 4.9.3 to 5.1.0. ([\#16813](https://github.com/element-hq/synapse/issues/16813))
+* Bump pillow from 10.1.0 to 10.2.0. ([\#16802](https://github.com/element-hq/synapse/issues/16802))
+* Bump pydantic from 2.5.2 to 2.5.3. ([\#16836](https://github.com/element-hq/synapse/issues/16836))
+* Bump pyo3 from 0.20.0 to 0.20.2. ([\#16791](https://github.com/element-hq/synapse/issues/16791))
+* Bump regex from 1.9.6 to 1.10.3. ([\#16837](https://github.com/element-hq/synapse/issues/16837))
+* Bump ruff from 0.1.13 to 0.1.14. ([\#16838](https://github.com/element-hq/synapse/issues/16838))
+* Bump ruff from 0.1.7 to 0.1.13. ([\#16814](https://github.com/element-hq/synapse/issues/16814))
+* Bump sentry-sdk from 1.35.0 to 1.39.1. ([\#16799](https://github.com/element-hq/synapse/issues/16799))
+* Bump serde_json from 1.0.108 to 1.0.111. ([\#16792](https://github.com/element-hq/synapse/issues/16792))
+* Bump service-identity from 23.1.0 to 24.1.0. ([\#16816](https://github.com/element-hq/synapse/issues/16816))
+* Bump types-commonmark from 0.9.2.4 to 0.9.2.20240106. ([\#16797](https://github.com/element-hq/synapse/issues/16797))
+* Bump types-jsonschema from 4.20.0.0 to 4.20.0.20240105. ([\#16800](https://github.com/element-hq/synapse/issues/16800))
+* Bump types-jsonschema from 4.20.0.20240105 to 4.21.0.20240118. ([\#16834](https://github.com/element-hq/synapse/issues/16834))
+* Bump types-netaddr from 0.9.0.1 to 0.10.0.20240106. ([\#16839](https://github.com/element-hq/synapse/issues/16839))
+* Bump typing-extensions from 4.8.0 to 4.9.0. ([\#16815](https://github.com/element-hq/synapse/issues/16815))
+
+
+# Synapse 1.99.0 (2024-01-16)
+
+Synapse 1.99.0 is the first Synapse release under an AGPLv3.0 licence (with CLA to enable Element to sell AGPL
+exceptions). You can read more about this here:
+
+ - https://matrix.org/blog/2023/11/06/future-of-synapse-dendrite/
+ - https://element.io/blog/element-to-adopt-agplv3/
+ - https://element.io/blog/synapse-now-lives-at-github-com-element-hq-synapse/
+
+No significant changes since 1.99.0rc1.
+
+
+# Synapse 1.99.0rc1 (2024-01-09)
+
+### Features
+
+- Add [config options](https://element-hq.github.io/synapse/v1.99/usage/configuration/config_documentation.html#server_notices) to set the avatar and the topic of the server notices room, as well as the avatar of the server notices user. ([\#16679](https://github.com/matrix-org/synapse/issues/16679))
+- Add config option [`email.notif_delay_before_mail`](https://element-hq.github.io/synapse/v1.99/usage/configuration/config_documentation.html#email) to tweak the delay before an email is sent following a notification. ([\#16696](https://github.com/matrix-org/synapse/issues/16696))
+- Add new configuration option [`sentry.environment`](https://element-hq.github.io/synapse/v1.99/usage/configuration/config_documentation.html#sentry) for improved system monitoring. Contributed by @zeeshanrafiqrana. ([\#16738](https://github.com/matrix-org/synapse/issues/16738))
+- Filter out rooms from the room directory being served to other homeservers when those rooms block that homeserver by their Access Control Lists. ([\#16759](https://github.com/element-hq/synapse/issues/16759))
+
+### Bugfixes
+
+- Fix a long-standing bug where the signing keys generated by Synapse were world-readable. Contributed by Fabian Klemp. ([\#16740](https://github.com/matrix-org/synapse/issues/16740))
+- Fix email verification redirection. Contributed by Fadhlan Ridhwanallah. ([\#16761](https://github.com/element-hq/synapse/issues/16761))
+- Fixed a bug that prevented users from being queried by display name if it contains non-ASCII characters. ([\#16767](https://github.com/element-hq/synapse/issues/16767))
+- Allow reactivate user without password with Admin API in some edge cases. ([\#16770](https://github.com/element-hq/synapse/issues/16770))
+- Adds the `recursion_depth` parameter to the response of the /relations endpoint if MSC3981 recursion is being performed. ([\#16775](https://github.com/element-hq/synapse/issues/16775))
+
+### Improved Documentation
+
+- Added version picker for Synapse documentation. Contributed by @Dmytro27Ind. ([\#16533](https://github.com/matrix-org/synapse/issues/16533))
+- Clarify that `password_config.enabled: "only_for_reauth"` does not allow new logins to be created using password auth. ([\#16737](https://github.com/matrix-org/synapse/issues/16737))
+- Remove value from header in configuration documentation for `refresh_token_lifetime`. ([\#16763](https://github.com/element-hq/synapse/issues/16763))
+- Add another custom statistics collection server to the documentation. Contributed by @loelkes. ([\#16769](https://github.com/element-hq/synapse/issues/16769))
+
+### Internal Changes
+
+- Remove run-once workflow after adding the version picker to the documentation. ([\#9453](https://github.com/element-hq/synapse/issues/9453))
+- Update the implementation of [MSC2965](https://github.com/matrix-org/matrix-spec-proposals/pull/2965) (OIDC Provider discovery). ([\#16726](https://github.com/matrix-org/synapse/issues/16726))
+- Move the rust stubs inline for better IDE integration. ([\#16757](https://github.com/element-hq/synapse/issues/16757))
+- Fix sample config doc CI. ([\#16758](https://github.com/element-hq/synapse/issues/16758))
+- Simplify event internal metadata class. ([\#16762](https://github.com/element-hq/synapse/issues/16762), [\#16780](https://github.com/element-hq/synapse/issues/16780))
+- Sign the published docker image using [cosign](https://docs.sigstore.dev/). ([\#16774](https://github.com/element-hq/synapse/issues/16774))
+- Port `EventInternalMetadata` class to Rust. ([\#16782](https://github.com/element-hq/synapse/issues/16782))
+
+
+
+### Updates to locked dependencies
+
+* Bump actions/setup-go from 4 to 5. ([\#16749](https://github.com/matrix-org/synapse/issues/16749))
+* Bump actions/setup-python from 4 to 5. ([\#16748](https://github.com/matrix-org/synapse/issues/16748))
+* Bump immutabledict from 3.0.0 to 4.0.0. ([\#16743](https://github.com/matrix-org/synapse/issues/16743))
+* Bump isort from 5.12.0 to 5.13.0. ([\#16745](https://github.com/matrix-org/synapse/issues/16745))
+* Bump isort from 5.13.0 to 5.13.1. ([\#16752](https://github.com/matrix-org/synapse/issues/16752))
+* Bump pydantic from 2.5.1 to 2.5.2. ([\#16747](https://github.com/matrix-org/synapse/issues/16747))
+* Bump ruff from 0.1.6 to 0.1.7. ([\#16746](https://github.com/matrix-org/synapse/issues/16746))
+* Bump types-setuptools from 68.2.0.2 to 69.0.0.0. ([\#16744](https://github.com/matrix-org/synapse/issues/16744))
diff --git a/docs/development/database_schema.md b/docs/development/database_schema.md
index 37a06acc12..620d1c16b0 100644
--- a/docs/development/database_schema.md
+++ b/docs/development/database_schema.md
@@ -162,7 +162,7 @@ by a unique name, the current status (stored in JSON), and some dependency infor
 * Whether the update requires a previous update to be complete.
 * A rough ordering for which to complete updates.
 
-A new background updates needs to be added to the `background_updates` table:
+A new background update needs to be added to the `background_updates` table:
 
 ```sql
 INSERT INTO background_updates (ordering, update_name, depends_on, progress_json) VALUES
diff --git a/docs/development/dependencies.md b/docs/development/dependencies.md
index e4378231aa..8e29ff3a57 100644
--- a/docs/development/dependencies.md
+++ b/docs/development/dependencies.md
@@ -187,7 +187,7 @@ useful.
 ## ...add a new dependency?
 
 Either:
-- manually update `pyproject.toml`; then `poetry lock --no-update`; or else
+- manually update `pyproject.toml`; then `poetry lock`; or else
 - `poetry add packagename`. See `poetry add --help`; note the `--dev`,
   `--extras` and `--optional` flags in particular.
 
@@ -202,12 +202,12 @@ poetry remove packagename
 ```
 
 ought to do the trick. Alternatively, manually update `pyproject.toml` and
-`poetry lock --no-update`. Include the updated `pyproject.toml` and `poetry.lock`
+`poetry lock`. Include the updated `pyproject.toml` and `poetry.lock`
 files in your commit.
 
 ## ...update the version range for an existing dependency?
 
-Best done by manually editing `pyproject.toml`, then `poetry lock --no-update`.
+Best done by manually editing `pyproject.toml`, then `poetry lock`.
 Include the updated `pyproject.toml` and `poetry.lock` in your commit.
 
 ## ...update a dependency in the locked environment?
@@ -233,7 +233,7 @@ poetry add packagename==1.2.3
 
 # Get poetry to recompute the content-hash of pyproject.toml without changing
 # the locked package versions.
-poetry lock --no-update
+poetry lock
 ```
 
 Either way, include the updated `poetry.lock` file in your commit.
diff --git a/docs/modules/spam_checker_callbacks.md b/docs/modules/spam_checker_callbacks.md
index ec306d81ab..c7f8606fd0 100644
--- a/docs/modules/spam_checker_callbacks.md
+++ b/docs/modules/spam_checker_callbacks.md
@@ -245,7 +245,7 @@ this callback.
 _First introduced in Synapse v1.37.0_
 
 ```python
-async def check_username_for_spam(user_profile: synapse.module_api.UserProfile) -> bool
+async def check_username_for_spam(user_profile: synapse.module_api.UserProfile, requester_id: str) -> bool
 ```
 
 Called when computing search results in the user directory. The module must return a
@@ -264,6 +264,8 @@ The profile is represented as a dictionary with the following keys:
 The module is given a copy of the original dictionary, so modifying it from within the
 module cannot modify a user's profile when included in user directory search results.
 
+The requester_id parameter is the ID of the user that called the user directory API.
+
 If multiple modules implement this callback, they will be considered in order. If a
 callback returns `False`, Synapse falls through to the next one. The value of the first
 callback that does not return `False` will be used. If this happens, Synapse will not call
diff --git a/docs/openid.md b/docs/openid.md
index 7a10b1615b..5a3d7e9fba 100644
--- a/docs/openid.md
+++ b/docs/openid.md
@@ -336,6 +336,36 @@ but it has a `response_types_supported` which excludes "code" (which we rely on,
 is even mentioned in their [documentation](https://developers.facebook.com/docs/facebook-login/manually-build-a-login-flow#login)),
 so we have to disable discovery and configure the URIs manually.
 
+### Forgejo
+
+Forgejo is a fork of Gitea that can act as an OAuth2 provider.
+
+The implementation of OAuth2 is improved compared to Gitea, as it provides a correctly defined `subject_claim` and `scopes`.
+
+Synapse config:
+
+```yaml
+oidc_providers:
+  - idp_id: forgejo
+    idp_name: Forgejo
+    discover: false
+    issuer: "https://your-forgejo.com/"
+    client_id: "your-client-id" # TO BE FILLED
+    client_secret: "your-client-secret" # TO BE FILLED
+    client_auth_method: client_secret_post
+    scopes: ["openid", "profile", "email", "groups"]
+    authorization_endpoint: "https://your-forgejo.com/login/oauth/authorize"
+    token_endpoint: "https://your-forgejo.com/login/oauth/access_token"
+    userinfo_endpoint: "https://your-forgejo.com/api/v1/user"
+    user_mapping_provider:
+      config:
+        subject_claim: "sub"
+        picture_claim: "picture"
+        localpart_template: "{{ user.preferred_username }}"
+        display_name_template: "{{ user.name }}"
+        email_template: "{{ user.email }}"
+```
+
 ### GitHub
 
 [GitHub][github-idp] is a bit special as it is not an OpenID Connect compliant provider, but
diff --git a/docs/reverse_proxy.md b/docs/reverse_proxy.md
index 7128af114e..45de2b1f65 100644
--- a/docs/reverse_proxy.md
+++ b/docs/reverse_proxy.md
@@ -74,7 +74,7 @@ server {
         proxy_pass http://localhost:8008;
         proxy_set_header X-Forwarded-For $remote_addr;
         proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_set_header Host $host;
+        proxy_set_header Host $host:$server_port;
 
         # Nginx by default only allows file uploads up to 1M in size
         # Increase client_max_body_size to match max_upload_size defined in homeserver.yaml
diff --git a/docs/setup/installation.md b/docs/setup/installation.md
index bfeacab375..0853496ab7 100644
--- a/docs/setup/installation.md
+++ b/docs/setup/installation.md
@@ -157,7 +157,7 @@ sudo pip install py-bcrypt
 
 #### Alpine Linux
 
-6543 maintains [Synapse packages for Alpine Linux](https://pkgs.alpinelinux.org/packages?name=synapse&branch=edge) in the community repository. Install with:
+Jahway603 maintains [Synapse packages for Alpine Linux](https://pkgs.alpinelinux.org/packages?name=synapse&branch=edge) in the community repository. Install with:
 
 ```sh
 sudo apk add synapse
@@ -310,29 +310,18 @@ sudo dnf install libtiff-devel libjpeg-devel libzip-devel freetype-devel \
 sudo dnf group install "Development Tools"
 ```
 
-##### Red Hat Enterprise Linux / Rocky Linux
+##### Red Hat Enterprise Linux / Rocky Linux / Oracle Linux
 
-*Note: The term "RHEL" below refers to both Red Hat Enterprise Linux and Rocky Linux. The distributions are 1:1 binary compatible.*
+*Note: The term "RHEL" below refers to Red Hat Enterprise Linux, Oracle Linux and Rocky Linux. The distributions are 1:1 binary compatible.*
 
 It's recommended to use the latest Python versions.
 
-RHEL 8 in particular ships with Python 3.6 by default which is EOL and therefore no longer supported by Synapse. RHEL 9 ship with Python 3.9 which is still supported by the Python core team as of this writing. However, newer Python versions provide significant performance improvements and they're available in official distributions' repositories. Therefore it's recommended to use them.
+RHEL 8 in particular ships with Python 3.6 by default which is EOL and therefore no longer supported by Synapse. RHEL 9 ships with Python 3.9 which is still supported by the Python core team as of this writing. However, newer Python versions provide significant performance improvements and they're available in official distributions' repositories. Therefore it's recommended to use them.
 
 Python 3.11 and 3.12 are available for both RHEL 8 and 9.
 
 These commands should be run as root user.
 
-RHEL 8
-```bash
-# Enable PowerTools repository
-dnf config-manager --set-enabled powertools
-```
-RHEL 9
-```bash
-# Enable CodeReady Linux Builder repository
-crb enable
-```
-
 Install new version of Python. You only need one of these:
 ```bash
 # Python 3.11
diff --git a/docs/spam_checker.md b/docs/spam_checker.md
index 1b6d814937..4ace3512b3 100644
--- a/docs/spam_checker.md
+++ b/docs/spam_checker.md
@@ -72,8 +72,8 @@ class ExampleSpamChecker:
     async def user_may_publish_room(self, userid, room_id):
         return True  # allow publishing of all rooms
 
-    async def check_username_for_spam(self, user_profile):
-        return False  # allow all usernames
+    async def check_username_for_spam(self, user_profile, requester_id):
+        return False  # allow all usernames regardless of requester
 
     async def check_registration_for_spam(
         self,
diff --git a/docs/upgrade.md b/docs/upgrade.md
index 45e63b0c5d..07a9641fdd 100644
--- a/docs/upgrade.md
+++ b/docs/upgrade.md
@@ -117,6 +117,52 @@ each upgrade are complete before moving on to the next upgrade, to avoid
 stacking them up. You can monitor the currently running background updates with
 [the Admin API](usage/administration/admin_api/background_updates.html#status).
 
+# Upgrading to v1.126.0
+
+## Room list publication rules change
+
+The default [`room_list_publication_rules`] setting was changed to disallow
+anyone (except server admins) from publishing to the room list by default.
+
+This is in line with Synapse policy of locking down features by default that can
+be abused without moderation.
+
+To keep the previous behavior of allowing publication by default, add the
+following to the config:
+
+```yaml
+room_list_publication_rules:
+  - "action": "allow"
+```
+
+[`room_list_publication_rules`]: usage/configuration/config_documentation.md#room_list_publication_rules
+
+## Change of signing key expiry date for the Debian/Ubuntu package repository
+
+Administrators using the Debian/Ubuntu packages from `packages.matrix.org`,
+please be aware that we have recently updated the expiry date on the repository's GPG signing key,
+but this change must be imported into your keyring.
+
+If you have the `matrix-org-archive-keyring` package installed and it updates before the current key expires, this should
+happen automatically.
+
+Otherwise, if you see an error similar to `The following signatures were invalid: EXPKEYSIG F473DD4473365DE1`, you
+will need to get a fresh copy of the keys. You can do so with:
+
+```sh
+sudo wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg
+```
+
+The old version of the key will expire on `2025-03-15`.
+
+# Upgrading to v1.122.0
+
+## Dropping support for PostgreSQL 11 and 12
+
+In line with our [deprecation policy](deprecation_policy.md), we've dropped
+support for PostgreSQL 11 and 12, as they are no longer supported upstream.
+This release of Synapse requires PostgreSQL 13+.
+
 # Upgrading to v1.120.0
 
 ## Removal of experimental MSC3886 feature
diff --git a/docs/usage/configuration/config_documentation.md b/docs/usage/configuration/config_documentation.md
index 7a48d76bbb..d2d282f203 100644
--- a/docs/usage/configuration/config_documentation.md
+++ b/docs/usage/configuration/config_documentation.md
@@ -162,6 +162,53 @@ Example configuration:
 pid_file: DATADIR/homeserver.pid
 ```
 ---
+### `daemonize`
+
+Specifies whether Synapse should be started as a daemon process. If Synapse is being
+managed by [systemd](../../systemd-with-workers/), this option must be omitted or set to
+`false`.
+
+This can also be set by the `--daemonize` (`-D`) argument when starting Synapse.
+
+See `worker_daemonize` for more information on daemonizing workers.
+
+Example configuration:
+```yaml
+daemonize: true
+```
+---
+### `print_pidfile`
+
+Print the path to the pidfile just before daemonizing. Defaults to false.
+
+This can also be set by the `--print-pidfile` argument when starting Synapse.
+
+Example configuration:
+```yaml
+print_pidfile: true
+```
+---
+### `user_agent_suffix`
+
+A suffix that is appended to the Synapse user-agent (ex. `Synapse/v1.123.0`). Defaults
+to None
+
+Example configuration:
+```yaml
+user_agent_suffix: " (I'm a teapot; Linux x86_64)"
+```
+---
+### `use_frozen_dicts`
+
+Determines whether we should freeze the internal dict object in `FrozenEvent`. Freezing
+prevents bugs where we accidentally share e.g. signature dicts. However, freezing a
+dict is expensive. Defaults to false.
+
+Example configuration:
+```yaml
+use_frozen_dicts: true
+```
+---
 ### `web_client_location`
 
 The absolute URL to the web client which `/` will redirect to. Defaults to none.
@@ -595,6 +642,17 @@ listeners:
       - names: [client, federation]
 ```
 
+---
+### `manhole`
+
+Turn on the Twisted telnet manhole service on the given port. Defaults to none.
+
+This can also be set by the `--manhole` argument when starting Synapse.
+
+Example configuration:
+```yaml
+manhole: 1234
+```
 ---
 ### `manhole_settings`
 
@@ -673,8 +731,9 @@ This setting has the following sub-options:
    TLS via STARTTLS *if the SMTP server supports it*. If this option is set,
    Synapse will refuse to connect unless the server supports STARTTLS.
 * `enable_tls`: By default, if the server supports TLS, it will be used, and the server
-   must present a certificate that is valid for 'smtp_host'. If this option
+   must present a certificate that is valid for `tlsname`. If this option
    is set to false, TLS will not be used.
+* `tlsname`: The domain name the SMTP server's TLS certificate must be valid for, defaulting to `smtp_host`.
 * `notif_from`: defines the "From" address to use when sending emails.
     It must be set if email sending is enabled. The placeholder '%(app)s' will be replaced by the application name,
     which is normally set in `app_name`, but may be overridden by the
@@ -741,6 +800,7 @@ email:
   force_tls: true
   require_transport_security: true
   enable_tls: false
+  tlsname: mail.server.example.com
   notif_from: "Your Friendly %(app)s homeserver <noreply@example.com>"
   app_name: my_branded_matrix_server
   enable_notifs: true
@@ -1866,6 +1926,50 @@ rc_federation:
   concurrent: 5
 ```
 ---
+### `rc_presence`
+
+This option sets ratelimiting for presence.
+
+The `rc_presence.per_user` option sets rate limits on how often a specific
+users' presence updates are evaluated. Ratelimited presence updates sent via sync are
+ignored, and no error is returned to the client.
+This option also sets the rate limit for the
+[`PUT /_matrix/client/v3/presence/{userId}/status`](https://spec.matrix.org/latest/client-server-api/#put_matrixclientv3presenceuseridstatus)
+endpoint.
+
+`per_user` defaults to `per_second: 0.1`, `burst_count: 1`.
+
+Example configuration:
+```yaml
+rc_presence:
+  per_user:
+    per_second: 0.05
+    burst_count: 1
+```
+---
+### `rc_delayed_event_mgmt`
+
+Ratelimiting settings for delayed event management.
+
+This is a ratelimiting option that ratelimits
+attempts to restart, cancel, or view delayed events
+based on the sending client's account and device ID.
+It defaults to: `per_second: 1`, `burst_count: 5`.
+
+Attempts to create or send delayed events are ratelimited not by this setting, but by `rc_message`.
+
+Setting this to a high value allows clients to make delayed event management requests often
+(such as repeatedly restarting a delayed event with a short timeout,
+or restarting several different delayed events all at once)
+without the risk of being ratelimited.
+
+Example configuration:
+```yaml
+rc_delayed_event_mgmt:
+  per_second: 2
+  burst_count: 20
+```
+---
 ### `federation_rr_transactions_per_room_per_second`
 
 Sets outgoing federation transaction frequency for sending read-receipts,
@@ -2511,6 +2615,14 @@ This is primarily intended for use with the `register_new_matrix_user` script
 (see [Registering a user](../../setup/installation.md#registering-a-user));
 however, the interface is [documented](../../admin_api/register_api.html).
 
+Replacing an existing `registration_shared_secret` with a new one requires users
+of the [Shared-Secret Registration API](../../admin_api/register_api.html) to
+start using the new secret for requesting any further one-time nonces.
+
+> ⚠️ **Warning** – The additional consequences of replacing
+> [`macaroon_secret_key`](#macaroon_secret_key) will apply in case it delegates
+> to `registration_shared_secret`.
+
 See also [`registration_shared_secret_path`](#registration_shared_secret_path).
 
 Example configuration:
@@ -3087,10 +3199,31 @@ A secret which is used to sign
 If none is specified, the `registration_shared_secret` is used, if one is given;
 otherwise, a secret key is derived from the signing key.
 
+> ⚠️ **Warning** – Replacing an existing `macaroon_secret_key` with a new one
+> will lead to invalidation of access tokens for all guest users. It will also
+> break unsubscribe links in emails sent before the change. An unlucky user
+> might encounter a broken SSO login flow and would have to start again.
+
 Example configuration:
 ```yaml
 macaroon_secret_key: <PRIVATE STRING>
 ```
+---
+### `macaroon_secret_key_path`
+
+An alternative to [`macaroon_secret_key`](#macaroon_secret_key):
+allows the secret key to be specified in an external file.
+
+The file should be a plain text file, containing only the secret key.
+Synapse reads the secret key from the given file once at startup.
+
+Example configuration:
+```yaml
+macaroon_secret_key_path: /path/to/secrets/file
+```
+
+_Added in Synapse 1.121.0._
+
 ---
 ### `form_secret`
 
@@ -3098,10 +3231,29 @@ A secret which is used to calculate HMACs for form values, to stop
 falsification of values. Must be specified for the User Consent
 forms to work.
 
+Replacing an existing `form_secret` with a new one might break the user consent
+page for an unlucky user and require them to reopen the page from a new link.
+
 Example configuration:
 ```yaml
 form_secret: <PRIVATE STRING>
 ```
+---
+### `form_secret_path`
+
+An alternative to [`form_secret`](#form_secret):
+allows the secret to be specified in an external file.
+
+The file should be a plain text file, containing only the secret.
+Synapse reads the secret from the given file once at startup.
+
+Example configuration:
+```yaml
+form_secret_path: /path/to/secrets/file
+```
+
+_Added in Synapse 1.126.0._
+
 ---
 ## Signing Keys
 Config options relating to signing keys
@@ -3298,8 +3450,9 @@ This setting has the following sub-options:
    The default is 'uid'.
 * `attribute_requirements`: It is possible to configure Synapse to only allow logins if SAML attributes
     match particular values. The requirements can be listed under
-   `attribute_requirements` as shown in the example. All of the listed attributes must
-    match for the login to be permitted.
+    `attribute_requirements` as shown in the example. All of the listed attributes must
+    match for the login to be permitted. Values can be specified in a `one_of` list to allow
+    multiple values for an attribute.
 * `idp_entityid`: If the metadata XML contains multiple IdP entities then the `idp_entityid`
    option must be set to the entity to redirect users to.
    Most deployments only have a single IdP entity and so should omit this option.
@@ -3380,7 +3533,9 @@ saml2_config:
     - attribute: userGroup
       value: "staff"
     - attribute: department
-      value: "sales"
+      one_of:
+        - "sales"
+        - "admins"
 
   idp_entityid: 'https://our_idp/entityid'
 ```
@@ -3463,6 +3618,24 @@ Options for each entry include:
    to `auto`, which uses PKCE if supported during metadata discovery. Set to `always`
    to force enable PKCE or `never` to force disable PKCE.
 
+* `id_token_signing_alg_values_supported`: List of the JWS signing algorithms (`alg`
+  values) that are supported for signing the `id_token`.
+
+  This is *not* required if `discovery` is disabled. We default to supporting `RS256` in
+  the downstream usage if no algorithms are configured here or in the discovery
+  document.
+
+  According to the spec, the algorithm `"RS256"` MUST be included. The absolute rigid
+  approach would be to reject this provider as non-compliant if it's not included but we
+  simply allow whatever and see what happens (you're the one that configured the value
+  and cooperating with the identity provider).
+
+  The `alg` value `"none"` MAY be supported but can only be used if the Authorization
+  Endpoint does not include `id_token` in the `response_type` (ex.
+  `/authorize?response_type=code` where `none` can apply,
+  `/authorize?response_type=code%20id_token` where `none` can't apply) (such as when
+  using the Authorization Code Flow).
+
 * `scopes`: list of scopes to request. This should normally include the "openid"
    scope. Defaults to `["openid"]`.
 
@@ -3489,6 +3662,13 @@ Options for each entry include:
    not included in `scopes`. Set to `userinfo_endpoint` to always use the
    userinfo endpoint.
 
+* `redirect_uri`: An optional string, that if set will override the `redirect_uri`
+  parameter sent in the requests to the authorization and token endpoints.
+  Useful if you want to redirect the client to another endpoint as part of the
+  OIDC login. Be aware that the client must then call Synapse's OIDC callback
+  URL (`<public_baseurl>/_synapse/client/oidc/callback`) manually afterwards.
+  Must be a valid URL including scheme and path.
+
 * `additional_authorization_parameters`: String to string dictionary that will be passed as
    additional parameters to the authorization grant URL.
 
@@ -4111,8 +4291,8 @@ unwanted entries from being published in the public room list.
 
 The format of this option is the same as that for
 [`alias_creation_rules`](#alias_creation_rules): an optional list of 0 or more
-rules. By default, no list is provided, meaning that all rooms may be
-published to the room list.
+rules. By default, no list is provided, meaning that no one may publish to the
+room list (except server admins).
 
 Otherwise, requests to publish a room are matched against each rule in order.
 The first rule that matches decides if the request is allowed or denied. If no
@@ -4138,6 +4318,10 @@ Note that the patterns match against fully qualified IDs, e.g. against
 of `alice`, `room` and `abcedgghijk`.
 
 
+_Changed in Synapse 1.126.0: The default was changed to deny publishing to the
+room list by default_
+
+
 Example configuration:
 
 ```yaml
@@ -4343,10 +4527,29 @@ HTTP requests from workers.
 The default, this value is omitted (equivalently `null`), which means that
 traffic between the workers and the main process is not authenticated.
 
+Replacing an existing `worker_replication_secret` with a new one will break
+communication with all workers that have not yet updated their secret.
+
 Example configuration:
 ```yaml
 worker_replication_secret: "secret_secret"
 ```
+---
+### `worker_replication_secret_path`
+
+An alternative to [`worker_replication_secret`](#worker_replication_secret):
+allows the secret to be specified in an external file.
+
+The file should be a plain text file, containing only the secret.
+Synapse reads the secret from the given file once at startup.
+
+Example configuration:
+```yaml
+worker_replication_secret_path: /path/to/secrets/file
+```
+
+_Added in Synapse 1.126.0._
+
 ---
 ### `start_pushers`
 
@@ -4447,6 +4650,10 @@ instance_map:
   worker1:
     host: localhost
     port: 8034
+  other:
+    host: localhost
+    port: 8035
+    tls: true
 ```
 Example configuration(#2, for UNIX sockets):
 ```yaml
diff --git a/docs/workers.md b/docs/workers.md
index 0116c455bc..08ee493da9 100644
--- a/docs/workers.md
+++ b/docs/workers.md
@@ -255,7 +255,7 @@ information.
     ^/_matrix/client/(r0|v3|unstable)/keys/changes$
     ^/_matrix/client/(r0|v3|unstable)/keys/claim$
     ^/_matrix/client/(r0|v3|unstable)/room_keys/
-    ^/_matrix/client/(r0|v3|unstable)/keys/upload/
+    ^/_matrix/client/(r0|v3|unstable)/keys/upload$
 
     # Registration/login requests
     ^/_matrix/client/(api/v1|r0|v3|unstable)/login$
@@ -273,17 +273,6 @@ information.
     ^/_matrix/client/(api/v1|r0|v3|unstable)/knock/
     ^/_matrix/client/(api/v1|r0|v3|unstable)/profile/
 
-    # Account data requests
-    ^/_matrix/client/(r0|v3|unstable)/.*/tags
-    ^/_matrix/client/(r0|v3|unstable)/.*/account_data
-
-    # Receipts requests
-    ^/_matrix/client/(r0|v3|unstable)/rooms/.*/receipt
-    ^/_matrix/client/(r0|v3|unstable)/rooms/.*/read_markers
-
-    # Presence requests
-    ^/_matrix/client/(api/v1|r0|v3|unstable)/presence/
-
     # User directory search requests
     ^/_matrix/client/(r0|v3|unstable)/user_directory/search$
 
@@ -292,6 +281,13 @@ Additionally, the following REST endpoints can be handled for GET requests:
     ^/_matrix/client/(api/v1|r0|v3|unstable)/pushrules/
     ^/_matrix/client/unstable/org.matrix.msc4140/delayed_events
 
+    # Account data requests
+    ^/_matrix/client/(r0|v3|unstable)/.*/tags
+    ^/_matrix/client/(r0|v3|unstable)/.*/account_data
+
+    # Presence requests
+    ^/_matrix/client/(api/v1|r0|v3|unstable)/presence/
+
 Pagination requests can also be handled, but all requests for a given
 room must be routed to the same instance. Additionally, care must be taken to
 ensure that the purge history admin API is not used while pagination requests
diff --git a/poetry.lock b/poetry.lock
index eece221095..ed98dd9f4e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 2.1.1 and should not be changed by hand.
 
 [[package]]
 name = "annotated-types"
@@ -6,6 +6,7 @@ version = "0.7.0"
 description = "Reusable constraint types to use with typing.Annotated"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "annotated_types-0.7.0-py3-none-any.whl", hash = "sha256:1f02e8b43a8fbbc3f3e0d4f0f4bfc8131bcb4eebe8849b8e5c773f3a1c582a53"},
     {file = "annotated_types-0.7.0.tar.gz", hash = "sha256:aff07c09a53a08bc8cfccb9c85b05f1aa9a2a6f23728d790723543408344ce89"},
@@ -17,28 +18,31 @@ version = "24.2.0"
 description = "Classes Without Boilerplate"
 optional = false
 python-versions = ">=3.7"
+groups = ["main", "dev"]
 files = [
     {file = "attrs-24.2.0-py3-none-any.whl", hash = "sha256:81921eb96de3191c8258c199618104dd27ac608d9366f5e35d011eae1867ede2"},
     {file = "attrs-24.2.0.tar.gz", hash = "sha256:5cfb1b9148b5b086569baec03f20d7b6bf3bcacc9a42bebf87ffaaca362f6346"},
 ]
 
 [package.extras]
-benchmark = ["cloudpickle", "hypothesis", "mypy (>=1.11.1)", "pympler", "pytest (>=4.3.0)", "pytest-codspeed", "pytest-mypy-plugins", "pytest-xdist[psutil]"]
-cov = ["cloudpickle", "coverage[toml] (>=5.3)", "hypothesis", "mypy (>=1.11.1)", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "pytest-xdist[psutil]"]
-dev = ["cloudpickle", "hypothesis", "mypy (>=1.11.1)", "pre-commit", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "pytest-xdist[psutil]"]
+benchmark = ["cloudpickle ; platform_python_implementation == \"CPython\"", "hypothesis", "mypy (>=1.11.1) ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\"", "pympler", "pytest (>=4.3.0)", "pytest-codspeed", "pytest-mypy-plugins ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\" and python_version < \"3.13\"", "pytest-xdist[psutil]"]
+cov = ["cloudpickle ; platform_python_implementation == \"CPython\"", "coverage[toml] (>=5.3)", "hypothesis", "mypy (>=1.11.1) ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\"", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\" and python_version < \"3.13\"", "pytest-xdist[psutil]"]
+dev = ["cloudpickle ; platform_python_implementation == \"CPython\"", "hypothesis", "mypy (>=1.11.1) ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\"", "pre-commit", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\" and python_version < \"3.13\"", "pytest-xdist[psutil]"]
 docs = ["cogapp", "furo", "myst-parser", "sphinx", "sphinx-notfound-page", "sphinxcontrib-towncrier", "towncrier (<24.7)"]
-tests = ["cloudpickle", "hypothesis", "mypy (>=1.11.1)", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins", "pytest-xdist[psutil]"]
-tests-mypy = ["mypy (>=1.11.1)", "pytest-mypy-plugins"]
+tests = ["cloudpickle ; platform_python_implementation == \"CPython\"", "hypothesis", "mypy (>=1.11.1) ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\"", "pympler", "pytest (>=4.3.0)", "pytest-mypy-plugins ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\" and python_version < \"3.13\"", "pytest-xdist[psutil]"]
+tests-mypy = ["mypy (>=1.11.1) ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\"", "pytest-mypy-plugins ; platform_python_implementation == \"CPython\" and python_version >= \"3.9\" and python_version < \"3.13\""]
 
 [[package]]
 name = "authlib"
-version = "1.3.2"
+version = "1.4.1"
 description = "The ultimate Python library in building OAuth and OpenID Connect servers and clients."
 optional = true
-python-versions = ">=3.8"
+python-versions = ">=3.9"
+groups = ["main"]
+markers = "extra == \"oidc\" or extra == \"jwt\" or extra == \"all\""
 files = [
-    {file = "Authlib-1.3.2-py2.py3-none-any.whl", hash = "sha256:ede026a95e9f5cdc2d4364a52103f5405e75aa156357e831ef2bfd0bc5094dfc"},
-    {file = "authlib-1.3.2.tar.gz", hash = "sha256:4b16130117f9eb82aa6eec97f6dd4673c3f960ac0283ccdae2897ee4bc030ba2"},
+    {file = "Authlib-1.4.1-py2.py3-none-any.whl", hash = "sha256:edc29c3f6a3e72cd9e9f45fff67fc663a2c364022eb0371c003f22d5405915c1"},
+    {file = "authlib-1.4.1.tar.gz", hash = "sha256:30ead9ea4993cdbab821dc6e01e818362f92da290c04c7f6a1940f86507a790d"},
 ]
 
 [package.dependencies]
@@ -50,6 +54,7 @@ version = "22.10.0"
 description = "Self-service finite-state machines for the programmer on the go."
 optional = false
 python-versions = "*"
+groups = ["main"]
 files = [
     {file = "Automat-22.10.0-py2.py3-none-any.whl", hash = "sha256:c3164f8742b9dc440f3682482d32aaff7bb53f71740dd018533f9de286b64180"},
     {file = "Automat-22.10.0.tar.gz", hash = "sha256:e56beb84edad19dcc11d30e8d9b895f75deeb5ef5e96b84a467066b3b84bb04e"},
@@ -64,38 +69,63 @@ visualize = ["Twisted (>=16.1.1)", "graphviz (>0.5.1)"]
 
 [[package]]
 name = "bcrypt"
-version = "4.2.0"
+version = "4.3.0"
 description = "Modern password hashing for your software and your servers"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
+groups = ["main"]
 files = [
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+    {file = "bcrypt-4.3.0-cp39-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:f6746e6fec103fcd509b96bacdfdaa2fbde9a553245dbada284435173a6f1aef"},
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+    {file = "bcrypt-4.3.0-cp39-abi3-manylinux_2_28_armv7l.manylinux_2_31_armv7l.whl", hash = "sha256:d9af79d322e735b1fc33404b5765108ae0ff232d4b54666d46730f8ac1a43676"},
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+    {file = "bcrypt-4.3.0-cp39-abi3-manylinux_2_34_x86_64.whl", hash = "sha256:531457e5c839d8caea9b589a1bcfe3756b0547d7814e9ce3d437f17da75c32b0"},
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+    {file = "bcrypt-4.3.0-cp39-abi3-win32.whl", hash = "sha256:b4d4e57f0a63fd0b358eb765063ff661328f69a04494427265950c71b992a39a"},
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+    {file = "bcrypt-4.3.0-pp310-pypy310_pp73-manylinux_2_34_aarch64.whl", hash = "sha256:b693dbb82b3c27a1604a3dff5bfc5418a7e6a781bb795288141e5f80cf3a3492"},
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+    {file = "bcrypt-4.3.0-pp311-pypy311_pp73-manylinux_2_28_x86_64.whl", hash = "sha256:bdc6a24e754a555d7316fa4774e64c6c3997d27ed2d1964d55920c7c227bc4ce"},
+    {file = "bcrypt-4.3.0-pp311-pypy311_pp73-manylinux_2_34_aarch64.whl", hash = "sha256:55a935b8e9a1d2def0626c4269db3fcd26728cbff1e84f0341465c31c4ee56d8"},
+    {file = "bcrypt-4.3.0-pp311-pypy311_pp73-manylinux_2_34_x86_64.whl", hash = "sha256:57967b7a28d855313a963aaea51bf6df89f833db4320da458e5b3c5ab6d4c938"},
+    {file = "bcrypt-4.3.0.tar.gz", hash = "sha256:3a3fd2204178b6d2adcf09cb4f6426ffef54762577a7c9b54c159008cb288c18"},
 ]
 
 [package.extras]
@@ -108,6 +138,7 @@ version = "6.2.0"
 description = "An easy safelist-based HTML-sanitizing tool."
 optional = false
 python-versions = ">=3.9"
+groups = ["main", "dev"]
 files = [
     {file = "bleach-6.2.0-py3-none-any.whl", hash = "sha256:117d9c6097a7c3d22fd578fcd8d35ff1e125df6736f554da4e432fdd63f31e5e"},
     {file = "bleach-6.2.0.tar.gz", hash = "sha256:123e894118b8a599fd80d3ec1a6d4cc7ce4e5882b1317a7e1ba69b56e95f991f"},
@@ -125,6 +156,7 @@ version = "2.0.0"
 description = "Canonical JSON"
 optional = false
 python-versions = ">=3.7"
+groups = ["main"]
 files = [
     {file = "canonicaljson-2.0.0-py3-none-any.whl", hash = "sha256:c38a315de3b5a0532f1ec1f9153cd3d716abfc565a558d00a4835428a34fca5b"},
     {file = "canonicaljson-2.0.0.tar.gz", hash = "sha256:e2fdaef1d7fadc5d9cb59bd3d0d41b064ddda697809ac4325dced721d12f113f"},
@@ -136,6 +168,7 @@ version = "2024.7.4"
 description = "Python package for providing Mozilla's CA Bundle."
 optional = false
 python-versions = ">=3.6"
+groups = ["main", "dev"]
 files = [
     {file = "certifi-2024.7.4-py3-none-any.whl", hash = "sha256:c198e21b1289c2ab85ee4e67bb4b4ef3ead0892059901a8d5b622f24a1101e90"},
     {file = "certifi-2024.7.4.tar.gz", hash = "sha256:5a1e7645bc0ec61a09e26c36f6106dd4cf40c6db3a1fb6352b0244e7fb057c7b"},
@@ -147,6 +180,7 @@ version = "1.17.1"
 description = "Foreign Function Interface for Python calling C code."
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "cffi-1.17.1-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:df8b1c11f177bc2313ec4b2d46baec87a5f3e71fc8b45dab2ee7cae86d9aba14"},
     {file = "cffi-1.17.1-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:8f2cdc858323644ab277e9bb925ad72ae0e67f69e804f4898c070998d50b1a67"},
@@ -226,6 +260,7 @@ version = "3.1.0"
 description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
 optional = false
 python-versions = ">=3.7.0"
+groups = ["main", "dev"]
 files = [
     {file = "charset-normalizer-3.1.0.tar.gz", hash = "sha256:34e0a2f9c370eb95597aae63bf85eb5e96826d81e3dcf88b8886012906f509b5"},
     {file = "charset_normalizer-3.1.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:e0ac8959c929593fee38da1c2b64ee9778733cdf03c482c9ff1d508b6b593b2b"},
@@ -306,13 +341,14 @@ files = [
 
 [[package]]
 name = "click"
-version = "8.1.7"
+version = "8.1.8"
 description = "Composable command line interface toolkit"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
-    {file = "click-8.1.7-py3-none-any.whl", hash = "sha256:ae74fb96c20a0277a1d615f1e4d73c8414f5a98db8b799a7931d1582f3390c28"},
-    {file = "click-8.1.7.tar.gz", hash = "sha256:ca9853ad459e787e2192211578cc907e7594e294c7ccc834310722b41b9ca6de"},
+    {file = "click-8.1.8-py3-none-any.whl", hash = "sha256:63c132bbbed01578a06712a2d1f497bb62d9c1c0d329b7903a866228027263b2"},
+    {file = "click-8.1.8.tar.gz", hash = "sha256:ed53c9d8990d83c2a27deae68e4ee337473f6330c040a31d4225c9574d16096a"},
 ]
 
 [package.dependencies]
@@ -324,6 +360,8 @@ version = "0.4.6"
 description = "Cross-platform colored terminal text."
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,>=2.7"
+groups = ["dev"]
+markers = "platform_system == \"Windows\""
 files = [
     {file = "colorama-0.4.6-py2.py3-none-any.whl", hash = "sha256:4f1d9991f5acc0ca119f9d443620b77f9d6b33703e51011c16baf57afb285fc6"},
     {file = "colorama-0.4.6.tar.gz", hash = "sha256:08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44"},
@@ -335,6 +373,7 @@ version = "0.9.1"
 description = "Python parser for the CommonMark Markdown spec"
 optional = false
 python-versions = "*"
+groups = ["dev"]
 files = [
     {file = "commonmark-0.9.1-py2.py3-none-any.whl", hash = "sha256:da2f38c92590f83de410ba1a3cbceafbc74fee9def35f9251ba9a971d6d66fd9"},
     {file = "commonmark-0.9.1.tar.gz", hash = "sha256:452f9dc859be7f06631ddcb328b6919c67984aca654e5fefb3914d54691aed60"},
@@ -349,6 +388,7 @@ version = "15.1.0"
 description = "Symbolic constants in Python"
 optional = false
 python-versions = "*"
+groups = ["main"]
 files = [
     {file = "constantly-15.1.0-py2.py3-none-any.whl", hash = "sha256:dd2fa9d6b1a51a83f0d7dd76293d734046aa176e384bf6e33b7e44880eb37c5d"},
     {file = "constantly-15.1.0.tar.gz", hash = "sha256:586372eb92059873e29eba4f9dec8381541b4d3834660707faf8ba59146dfc35"},
@@ -360,6 +400,7 @@ version = "43.0.3"
 description = "cryptography is a package which provides cryptographic recipes and primitives to Python developers."
 optional = false
 python-versions = ">=3.7"
+groups = ["main", "dev"]
 files = [
     {file = "cryptography-43.0.3-cp37-abi3-macosx_10_9_universal2.whl", hash = "sha256:bf7a1932ac4176486eab36a19ed4c0492da5d97123f1406cf15e41b05e787d2e"},
     {file = "cryptography-43.0.3-cp37-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:63efa177ff54aec6e1c0aefaa1a241232dcd37413835a9b674b6e3f0ae2bfd3e"},
@@ -409,6 +450,8 @@ version = "0.7.1"
 description = "XML bomb protection for Python stdlib modules"
 optional = true
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+groups = ["main"]
+markers = "extra == \"saml2\" or extra == \"all\""
 files = [
     {file = "defusedxml-0.7.1-py2.py3-none-any.whl", hash = "sha256:a352e7e428770286cc899e2542b6cdaedb2b4953ff269a210103ec58f6198a61"},
     {file = "defusedxml-0.7.1.tar.gz", hash = "sha256:1bb3032db185915b62d7c6209c5a8792be6a32ab2fedacc84e01b52c51aa3e69"},
@@ -420,6 +463,7 @@ version = "1.2.13"
 description = "Python @deprecated decorator to deprecate old python classes, functions or methods."
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+groups = ["dev"]
 files = [
     {file = "Deprecated-1.2.13-py2.py3-none-any.whl", hash = "sha256:64756e3e14c8c5eea9795d93c524551432a0be75629f8f29e67ab8caf076c76d"},
     {file = "Deprecated-1.2.13.tar.gz", hash = "sha256:43ac5335da90c31c24ba028af536a91d41d53f9e6901ddb021bcc572ce44e38d"},
@@ -429,7 +473,7 @@ files = [
 wrapt = ">=1.10,<2"
 
 [package.extras]
-dev = ["PyTest", "PyTest (<5)", "PyTest-Cov", "PyTest-Cov (<2.6)", "bump2version (<1)", "configparser (<5)", "importlib-metadata (<3)", "importlib-resources (<4)", "sphinx (<2)", "sphinxcontrib-websupport (<2)", "tox", "zipp (<2)"]
+dev = ["PyTest (<5) ; python_version < \"3.6\"", "PyTest ; python_version >= \"3.6\"", "PyTest-Cov (<2.6) ; python_version < \"3.6\"", "PyTest-Cov ; python_version >= \"3.6\"", "bump2version (<1)", "configparser (<5) ; python_version < \"3\"", "importlib-metadata (<3) ; python_version < \"3\"", "importlib-resources (<4) ; python_version < \"3\"", "sphinx (<2)", "sphinxcontrib-websupport (<2) ; python_version < \"3\"", "tox", "zipp (<2) ; python_version < \"3\""]
 
 [[package]]
 name = "docutils"
@@ -437,6 +481,7 @@ version = "0.19"
 description = "Docutils -- Python Documentation Utilities"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "docutils-0.19-py3-none-any.whl", hash = "sha256:5e1de4d849fee02c63b040a4a3fd567f4ab104defd8a5511fbbc24a8a017efbc"},
     {file = "docutils-0.19.tar.gz", hash = "sha256:33995a6753c30b7f577febfc2c50411fec6aac7f7ffeb7c4cfe5991072dcf9e6"},
@@ -448,6 +493,8 @@ version = "4.1.5"
 description = "XPath 1.0/2.0/3.0/3.1 parsers and selectors for ElementTree and lxml"
 optional = true
 python-versions = ">=3.7"
+groups = ["main"]
+markers = "extra == \"saml2\" or extra == \"all\""
 files = [
     {file = "elementpath-4.1.5-py3-none-any.whl", hash = "sha256:2ac1a2fb31eb22bbbf817f8cf6752f844513216263f0e3892c8e79782fe4bb55"},
     {file = "elementpath-4.1.5.tar.gz", hash = "sha256:c2d6dc524b29ef751ecfc416b0627668119d8812441c555d7471da41d4bacb8d"},
@@ -462,6 +509,7 @@ version = "4.0.10"
 description = "Git Object Database"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "gitdb-4.0.10-py3-none-any.whl", hash = "sha256:c286cf298426064079ed96a9e4a9d39e7f3e9bf15ba60701e95f5492f28415c7"},
     {file = "gitdb-4.0.10.tar.gz", hash = "sha256:6eb990b69df4e15bad899ea868dc46572c3f75339735663b81de79b06f17eb9a"},
@@ -472,123 +520,141 @@ smmap = ">=3.0.1,<6"
 
 [[package]]
 name = "gitpython"
-version = "3.1.43"
+version = "3.1.44"
 description = "GitPython is a Python library used to interact with Git repositories"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
-    {file = "GitPython-3.1.43-py3-none-any.whl", hash = "sha256:eec7ec56b92aad751f9912a73404bc02ba212a23adb2c7098ee668417051a1ff"},
-    {file = "GitPython-3.1.43.tar.gz", hash = "sha256:35f314a9f878467f5453cc1fee295c3e18e52f1b99f10f6cf5b1682e968a9e7c"},
+    {file = "GitPython-3.1.44-py3-none-any.whl", hash = "sha256:9e0e10cda9bed1ee64bc9a6de50e7e38a9c9943241cd7f585f6df3ed28011110"},
+    {file = "gitpython-3.1.44.tar.gz", hash = "sha256:c87e30b26253bf5418b01b0660f818967f3c503193838337fe5e573331249269"},
 ]
 
 [package.dependencies]
 gitdb = ">=4.0.1,<5"
 
 [package.extras]
-doc = ["sphinx (==4.3.2)", "sphinx-autodoc-typehints", "sphinx-rtd-theme", "sphinxcontrib-applehelp (>=1.0.2,<=1.0.4)", "sphinxcontrib-devhelp (==1.0.2)", "sphinxcontrib-htmlhelp (>=2.0.0,<=2.0.1)", "sphinxcontrib-qthelp (==1.0.3)", "sphinxcontrib-serializinghtml (==1.1.5)"]
-test = ["coverage[toml]", "ddt (>=1.1.1,!=1.4.3)", "mock", "mypy", "pre-commit", "pytest (>=7.3.1)", "pytest-cov", "pytest-instafail", "pytest-mock", "pytest-sugar", "typing-extensions"]
+doc = ["sphinx (>=7.1.2,<7.2)", "sphinx-autodoc-typehints", "sphinx_rtd_theme"]
+test = ["coverage[toml]", "ddt (>=1.1.1,!=1.4.3)", "mock ; python_version < \"3.8\"", "mypy", "pre-commit", "pytest (>=7.3.1)", "pytest-cov", "pytest-instafail", "pytest-mock", "pytest-sugar", "typing-extensions ; python_version < \"3.11\""]
 
 [[package]]
 name = "hiredis"
-version = "3.0.0"
+version = "3.1.0"
 description = "Python wrapper for hiredis"
 optional = true
 python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"redis\" or extra == \"all\""
 files = [
-    {file = "hiredis-3.0.0-cp310-cp310-macosx_10_15_universal2.whl", hash = "sha256:4b182791c41c5eb1d9ed736f0ff81694b06937ca14b0d4dadde5dadba7ff6dae"},
-    {file = "hiredis-3.0.0-cp310-cp310-macosx_10_15_x86_64.whl", hash = "sha256:13c275b483a052dd645eb2cb60d6380f1f5215e4c22d6207e17b86be6dd87ffa"},
-    {file = "hiredis-3.0.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:c1018cc7f12824506f165027eabb302735b49e63af73eb4d5450c66c88f47026"},
-    {file = "hiredis-3.0.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:83a29cc7b21b746cb6a480189e49f49b2072812c445e66a9e38d2004d496b81c"},
-    {file = "hiredis-3.0.0-cp310-cp310-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:e241fab6332e8fb5f14af00a4a9c6aefa22f19a336c069b7ddbf28ef8341e8d6"},
-    {file = "hiredis-3.0.0-cp310-cp310-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:1fb8de899f0145d6c4d5d4bd0ee88a78eb980a7ffabd51e9889251b8f58f1785"},
-    {file = "hiredis-3.0.0-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:b23291951959141173eec10f8573538e9349fa27f47a0c34323d1970bf891ee5"},
-    {file = "hiredis-3.0.0-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:e421ac9e4b5efc11705a0d5149e641d4defdc07077f748667f359e60dc904420"},
-    {file = "hiredis-3.0.0-cp310-cp310-musllinux_1_2_aarch64.whl", hash = "sha256:77c8006c12154c37691b24ff293c077300c22944018c3ff70094a33e10c1d795"},
-    {file = "hiredis-3.0.0-cp310-cp310-musllinux_1_2_i686.whl", hash = "sha256:41afc0d3c18b59eb50970479a9c0e5544fb4b95e3a79cf2fbaece6ddefb926fe"},
-    {file = "hiredis-3.0.0-cp310-cp310-musllinux_1_2_ppc64le.whl", hash = "sha256:04ccae6dcd9647eae6025425ab64edb4d79fde8b9e6e115ebfabc6830170e3b2"},
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+    {file = "hiredis-3.1.0-pp38-pypy38_pp73-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:5ce71a797b5bc02c51da082428c00251ed6a7a67a03acbda5fbf9e8d028725f6"},
+    {file = "hiredis-3.1.0-pp38-pypy38_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:2e04c7feb9467e3170cd4d5bee381775783d81bbc45d6147c1c0ce3b50dc04f9"},
+    {file = "hiredis-3.1.0-pp38-pypy38_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:a31806306a60f3565c04c964d6bee0e9d4a5120e1da589e41976b53972edf635"},
+    {file = "hiredis-3.1.0-pp38-pypy38_pp73-win_amd64.whl", hash = "sha256:bc51f594c2c0863ded6501642dc96701ca8bbea9ced4fa3af0a1aeda8aa634cb"},
+    {file = "hiredis-3.1.0-pp39-pypy39_pp73-macosx_10_15_x86_64.whl", hash = "sha256:4663a319ab7d22c597b9421e5ea384fd583e044f2f1ca9a1b98d4fef8a0fea2f"},
+    {file = "hiredis-3.1.0-pp39-pypy39_pp73-macosx_11_0_arm64.whl", hash = "sha256:8060fa256862b0c3de64a73ab45bc1ccf381caca464f2647af9075b200828948"},
+    {file = "hiredis-3.1.0-pp39-pypy39_pp73-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:3e9445b7f117a9c8c8ccad97cb44daa55ddccff3cbc9079984eac56d982ba01f"},
+    {file = "hiredis-3.1.0-pp39-pypy39_pp73-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:732cf1c5cf1324f7bf3b6086976fe62a2ca98f0bf6316f31063c2c67be8797bc"},
+    {file = "hiredis-3.1.0-pp39-pypy39_pp73-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:2102a94063d878c40df92f55199637a74f535e3a0b79ceba4a00538853a21be3"},
+    {file = "hiredis-3.1.0-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:d968dde69e3fe903bf9ef00667669dcf04a3e096e33aaf138775106ead138bc8"},
+    {file = "hiredis-3.1.0.tar.gz", hash = "sha256:51d40ac3611091020d7dea6b05ed62cb152bff595fa4f931e7b6479d777acf7c"},
 ]
 
 [[package]]
@@ -597,6 +663,7 @@ version = "21.0.0"
 description = "A featureful, immutable, and correct URL for Python."
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+groups = ["main"]
 files = [
     {file = "hyperlink-21.0.0-py2.py3-none-any.whl", hash = "sha256:e6b14c37ecb73e89c77d78cdb4c2cc8f3fb59a885c5b3f819ff4ed80f25af1b4"},
     {file = "hyperlink-21.0.0.tar.gz", hash = "sha256:427af957daa58bc909471c6c40f74c5450fa123dd093fc53efd2e91d2705a56b"},
@@ -605,12 +672,33 @@ files = [
 [package.dependencies]
 idna = ">=2.5"
 
+[[package]]
+name = "id"
+version = "1.5.0"
+description = "A tool for generating OIDC identities"
+optional = false
+python-versions = ">=3.8"
+groups = ["dev"]
+files = [
+    {file = "id-1.5.0-py3-none-any.whl", hash = "sha256:f1434e1cef91f2cbb8a4ec64663d5a23b9ed43ef44c4c957d02583d61714c658"},
+    {file = "id-1.5.0.tar.gz", hash = "sha256:292cb8a49eacbbdbce97244f47a97b4c62540169c976552e497fd57df0734c1d"},
+]
+
+[package.dependencies]
+requests = "*"
+
+[package.extras]
+dev = ["build", "bump (>=1.3.2)", "id[lint,test]"]
+lint = ["bandit", "interrogate", "mypy", "ruff (<0.8.2)", "types-requests"]
+test = ["coverage[toml]", "pretend", "pytest", "pytest-cov"]
+
 [[package]]
 name = "idna"
 version = "3.10"
 description = "Internationalized Domain Names in Applications (IDNA)"
 optional = false
 python-versions = ">=3.6"
+groups = ["main", "dev"]
 files = [
     {file = "idna-3.10-py3-none-any.whl", hash = "sha256:946d195a0d259cbba61165e88e65941f16e9b36ea6ddb97f00452bae8b1287d3"},
     {file = "idna-3.10.tar.gz", hash = "sha256:12f65c9b470abda6dc35cf8e63cc574b1c52b11df2c86030af0ac09b01b13ea9"},
@@ -625,6 +713,7 @@ version = "3.3.0"
 description = "Iterative JSON parser with standard Python iterator interfaces"
 optional = false
 python-versions = "*"
+groups = ["main"]
 files = [
     {file = "ijson-3.3.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:7f7a5250599c366369fbf3bc4e176f5daa28eb6bc7d6130d02462ed335361675"},
     {file = "ijson-3.3.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:f87a7e52f79059f9c58f6886c262061065eb6f7554a587be7ed3aa63e6b71b34"},
@@ -728,6 +817,7 @@ version = "4.2.1"
 description = "Immutable wrapper around dictionaries (a fork of frozendict)"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
     {file = "immutabledict-4.2.1-py3-none-any.whl", hash = "sha256:c56a26ced38c236f79e74af3ccce53772827cef5c3bce7cab33ff2060f756373"},
     {file = "immutabledict-4.2.1.tar.gz", hash = "sha256:d91017248981c72eb66c8ff9834e99c2f53562346f23e7f51e7a5ebcf66a3bcc"},
@@ -739,6 +829,8 @@ version = "6.7.0"
 description = "Read metadata from Python packages"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\" and python_version < \"3.12\" or python_version < \"3.10\""
 files = [
     {file = "importlib_metadata-6.7.0-py3-none-any.whl", hash = "sha256:cb52082e659e97afc5dac71e79de97d8681de3aa07ff18578330904a9d18e5b5"},
     {file = "importlib_metadata-6.7.0.tar.gz", hash = "sha256:1aaf550d4f73e5d6783e7acb77aec43d49da8017410afae93822cc9cca98c4d4"},
@@ -750,7 +842,7 @@ zipp = ">=0.5"
 [package.extras]
 docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
 perf = ["ipython"]
-testing = ["flufl.flake8", "importlib-resources (>=1.3)", "packaging", "pyfakefs", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-mypy (>=0.9.1)", "pytest-perf (>=0.9.2)", "pytest-ruff"]
+testing = ["flufl.flake8", "importlib-resources (>=1.3) ; python_version < \"3.9\"", "packaging", "pyfakefs", "pytest (>=6)", "pytest-black (>=0.3.7) ; platform_python_implementation != \"PyPy\"", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-mypy (>=0.9.1) ; platform_python_implementation != \"PyPy\"", "pytest-perf (>=0.9.2)", "pytest-ruff"]
 
 [[package]]
 name = "importlib-resources"
@@ -758,6 +850,8 @@ version = "5.12.0"
 description = "Read resources from Python packages"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
+markers = "python_version < \"3.10\""
 files = [
     {file = "importlib_resources-5.12.0-py3-none-any.whl", hash = "sha256:7b1deeebbf351c7578e09bf2f63fa2ce8b5ffec296e0d349139d43cca061a81a"},
     {file = "importlib_resources-5.12.0.tar.gz", hash = "sha256:4be82589bf5c1d7999aedf2a45159d10cb3ca4f19b2271f8792bc8e6da7b22f6"},
@@ -768,7 +862,7 @@ zipp = {version = ">=3.1.0", markers = "python_version < \"3.10\""}
 
 [package.extras]
 docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-lint"]
-testing = ["flake8 (<5)", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1)"]
+testing = ["flake8 (<5)", "pytest (>=6)", "pytest-black (>=0.3.7) ; platform_python_implementation != \"PyPy\"", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8 ; python_version < \"3.12\"", "pytest-mypy (>=0.9.1) ; platform_python_implementation != \"PyPy\""]
 
 [[package]]
 name = "incremental"
@@ -776,6 +870,7 @@ version = "24.7.2"
 description = "A small library that versions your Python projects."
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
     {file = "incremental-24.7.2-py3-none-any.whl", hash = "sha256:8cb2c3431530bec48ad70513931a760f446ad6c25e8333ca5d95e24b0ed7b8fe"},
     {file = "incremental-24.7.2.tar.gz", hash = "sha256:fb4f1d47ee60efe87d4f6f0ebb5f70b9760db2b2574c59c8e8912be4ebd464c9"},
@@ -794,6 +889,8 @@ version = "4.8.0"
 description = "Jaeger Python OpenTracing Tracer implementation"
 optional = true
 python-versions = ">=3.7"
+groups = ["main"]
+markers = "extra == \"opentracing\" or extra == \"all\""
 files = [
     {file = "jaeger-client-4.8.0.tar.gz", hash = "sha256:3157836edab8e2c209bd2d6ae61113db36f7ee399e66b1dcbb715d87ab49bfe0"},
 ]
@@ -813,6 +910,8 @@ version = "3.2.3"
 description = "Utility functions for Python class constructs"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\""
 files = [
     {file = "jaraco.classes-3.2.3-py3-none-any.whl", hash = "sha256:2353de3288bc6b82120752201c6b1c1a14b058267fa424ed5ce5984e3b922158"},
     {file = "jaraco.classes-3.2.3.tar.gz", hash = "sha256:89559fa5c1d3c34eff6f631ad80bb21f378dbcbb35dd161fd2c6b93f5be2f98a"},
@@ -823,7 +922,7 @@ more-itertools = "*"
 
 [package.extras]
 docs = ["jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)"]
-testing = ["flake8 (<5)", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1)"]
+testing = ["flake8 (<5)", "pytest (>=6)", "pytest-black (>=0.3.7) ; platform_python_implementation != \"PyPy\"", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1) ; platform_python_implementation != \"PyPy\""]
 
 [[package]]
 name = "jeepney"
@@ -831,6 +930,8 @@ version = "0.8.0"
 description = "Low-level, pure Python DBus protocol wrapper."
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\" and sys_platform == \"linux\""
 files = [
     {file = "jeepney-0.8.0-py3-none-any.whl", hash = "sha256:c0a454ad016ca575060802ee4d590dd912e35c122fa04e70306de3d076cce755"},
     {file = "jeepney-0.8.0.tar.gz", hash = "sha256:5efe48d255973902f6badc3ce55e2aa6c5c3b3bc642059ef3a91247bcfcc5806"},
@@ -838,17 +939,18 @@ files = [
 
 [package.extras]
 test = ["async-timeout", "pytest", "pytest-asyncio (>=0.17)", "pytest-trio", "testpath", "trio"]
-trio = ["async_generator", "trio"]
+trio = ["async_generator ; python_version == \"3.6\"", "trio"]
 
 [[package]]
 name = "jinja2"
-version = "3.1.4"
+version = "3.1.5"
 description = "A very fast and expressive template engine."
 optional = false
 python-versions = ">=3.7"
+groups = ["main", "dev"]
 files = [
-    {file = "jinja2-3.1.4-py3-none-any.whl", hash = "sha256:bc5dd2abb727a5319567b7a813e6a2e7318c39f4f487cfe6c89c6f9c7d25197d"},
-    {file = "jinja2-3.1.4.tar.gz", hash = "sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369"},
+    {file = "jinja2-3.1.5-py3-none-any.whl", hash = "sha256:aba0f4dc9ed8013c424088f68a5c226f7d6097ed89b246d7749c2ec4175c6adb"},
+    {file = "jinja2-3.1.5.tar.gz", hash = "sha256:8fefff8dc3034e27bb80d67c671eb8a9bc424c0ef4c0826edbff304cceff43bb"},
 ]
 
 [package.dependencies]
@@ -863,6 +965,7 @@ version = "4.23.0"
 description = "An implementation of JSON Schema validation for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
     {file = "jsonschema-4.23.0-py3-none-any.whl", hash = "sha256:fbadb6f8b144a8f8cf9f0b89ba94501d143e50411a1278633f56a7acf7fd5566"},
     {file = "jsonschema-4.23.0.tar.gz", hash = "sha256:d71497fef26351a33265337fa77ffeb82423f3ea21283cd9467bb03999266bc4"},
@@ -884,6 +987,7 @@ version = "2023.6.1"
 description = "The JSON Schema meta-schemas and vocabularies, exposed as a Registry"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
     {file = "jsonschema_specifications-2023.6.1-py3-none-any.whl", hash = "sha256:3d2b82663aff01815f744bb5c7887e2121a63399b49b104a3c96145474d091d7"},
     {file = "jsonschema_specifications-2023.6.1.tar.gz", hash = "sha256:ca1c4dd059a9e7b34101cf5b3ab7ff1d18b139f35950d598d629837ef66e8f28"},
@@ -898,6 +1002,8 @@ version = "23.13.1"
 description = "Store and access your passwords safely."
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\""
 files = [
     {file = "keyring-23.13.1-py3-none-any.whl", hash = "sha256:771ed2a91909389ed6148631de678f82ddc73737d85a927f382a8a1b157898cd"},
     {file = "keyring-23.13.1.tar.gz", hash = "sha256:ba2e15a9b35e21908d0aaf4e0a47acc52d6ae33444df0da2b49d41a46ef6d678"},
@@ -913,7 +1019,7 @@ SecretStorage = {version = ">=3.2", markers = "sys_platform == \"linux\""}
 [package.extras]
 completion = ["shtab"]
 docs = ["furo", "jaraco.packaging (>=9)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (>=3.5)"]
-testing = ["flake8 (<5)", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8", "pytest-mypy (>=0.9.1)"]
+testing = ["flake8 (<5)", "pytest (>=6)", "pytest-black (>=0.3.7) ; platform_python_implementation != \"PyPy\"", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=1.3)", "pytest-flake8 ; python_version < \"3.12\"", "pytest-mypy (>=0.9.1) ; platform_python_implementation != \"PyPy\""]
 
 [[package]]
 name = "ldap3"
@@ -921,6 +1027,8 @@ version = "2.9.1"
 description = "A strictly RFC 4510 conforming LDAP V3 pure Python client library"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"matrix-synapse-ldap3\" or extra == \"all\""
 files = [
     {file = "ldap3-2.9.1-py2.py3-none-any.whl", hash = "sha256:5869596fc4948797020d3f03b7939da938778a0f9e2009f7a072ccf92b8e8d70"},
     {file = "ldap3-2.9.1.tar.gz", hash = "sha256:f3e7fc4718e3f09dda568b57100095e0ce58633bcabbed8667ce3f8fbaa4229f"},
@@ -935,6 +1043,8 @@ version = "5.3.0"
 description = "Powerful and Pythonic XML processing library combining libxml2/libxslt with the ElementTree API."
 optional = true
 python-versions = ">=3.6"
+groups = ["main"]
+markers = "extra == \"url-preview\" or extra == \"all\""
 files = [
     {file = "lxml-5.3.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:dd36439be765e2dde7660212b5275641edbc813e7b24668831a5c8ac91180656"},
     {file = "lxml-5.3.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:ae5fe5c4b525aa82b8076c1a59d642c17b6e8739ecf852522c6321852178119d"},
@@ -1089,6 +1199,7 @@ version = "0.5.1"
 description = "Type annotations for the lxml package"
 optional = false
 python-versions = "*"
+groups = ["dev"]
 files = [
     {file = "lxml-stubs-0.5.1.tar.gz", hash = "sha256:e0ec2aa1ce92d91278b719091ce4515c12adc1d564359dfaf81efa7d4feab79d"},
     {file = "lxml_stubs-0.5.1-py3-none-any.whl", hash = "sha256:1f689e5dbc4b9247cb09ae820c7d34daeb1fdbd1db06123814b856dae7787272"},
@@ -1103,6 +1214,7 @@ version = "2.2.0"
 description = "Python port of markdown-it. Markdown parsing, done right!"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "markdown-it-py-2.2.0.tar.gz", hash = "sha256:7c9a5e412688bc771c67432cbfebcdd686c93ce6484913dccf06cb5a0bea35a1"},
     {file = "markdown_it_py-2.2.0-py3-none-any.whl", hash = "sha256:5a35f8d1870171d9acc47b99612dc146129b631baf04970128b568f190d0cc30"},
@@ -1123,61 +1235,73 @@ testing = ["coverage", "pytest", "pytest-cov", "pytest-regressions"]
 
 [[package]]
 name = "markupsafe"
-version = "2.1.2"
+version = "3.0.2"
 description = "Safely add untrusted strings to HTML/XML markup."
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.9"
+groups = ["main", "dev"]
 files = [
-    {file = "MarkupSafe-2.1.2-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:665a36ae6f8f20a4676b53224e33d456a6f5a72657d9c83c2aa00765072f31f7"},
-    {file = "MarkupSafe-2.1.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:340bea174e9761308703ae988e982005aedf427de816d1afe98147668cc03036"},
-    {file = "MarkupSafe-2.1.2-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:22152d00bf4a9c7c83960521fc558f55a1adbc0631fbb00a9471e097b19d72e1"},
-    {file = "MarkupSafe-2.1.2-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:28057e985dace2f478e042eaa15606c7efccb700797660629da387eb289b9323"},
-    {file = "MarkupSafe-2.1.2-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:ca244fa73f50a800cf8c3ebf7fd93149ec37f5cb9596aa8873ae2c1d23498601"},
-    {file = "MarkupSafe-2.1.2-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:d9d971ec1e79906046aa3ca266de79eac42f1dbf3612a05dc9368125952bd1a1"},
-    {file = "MarkupSafe-2.1.2-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:7e007132af78ea9df29495dbf7b5824cb71648d7133cf7848a2a5dd00d36f9ff"},
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 ]
 
 [[package]]
@@ -1186,6 +1310,7 @@ version = "1.3.0"
 description = "Common utilities for Synapse, Sydent and Sygnal"
 optional = false
 python-versions = ">=3.7"
+groups = ["main"]
 files = [
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@@ -1204,6 +1329,8 @@ version = "0.3.0"
 description = "An LDAP3 auth provider for Synapse"
 optional = true
 python-versions = ">=3.7"
+groups = ["main"]
+markers = "extra == \"matrix-synapse-ldap3\" or extra == \"all\""
 files = [
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@@ -1223,6 +1350,7 @@ version = "0.1.2"
 description = "Markdown URL utilities"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
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@@ -1234,6 +1362,8 @@ version = "9.1.0"
 description = "More routines for operating on iterables, beyond itertools"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\""
 files = [
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@@ -1245,6 +1375,7 @@ version = "1.1.0"
 description = "MessagePack serializer"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
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 description = "Optional static typing for Python"
 optional = false
 python-versions = ">=3.8"
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 ]
 
 [package.dependencies]
@@ -1355,6 +1492,7 @@ typing-extensions = ">=4.6.0"
 
 [package.extras]
 dmypy = ["psutil (>=4.0)"]
+faster-cache = ["orjson"]
 install-types = ["pip"]
 mypyc = ["setuptools (>=50)"]
 reports = ["lxml"]
@@ -1365,6 +1503,7 @@ version = "1.0.0"
 description = "Type system extensions for programs checked with the mypy type checker."
 optional = false
 python-versions = ">=3.5"
+groups = ["dev"]
 files = [
     {file = "mypy_extensions-1.0.0-py3-none-any.whl", hash = "sha256:4392f6c0eb8a5668a69e23d168ffa70f0be9ccfd32b5cc2d26a34ae5b844552d"},
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@@ -1372,17 +1511,18 @@ files = [
 
 [[package]]
 name = "mypy-zope"
-version = "1.0.8"
+version = "1.0.9"
 description = "Plugin for mypy to support zope interfaces"
 optional = false
 python-versions = "*"
+groups = ["dev"]
 files = [
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 ]
 
 [package.dependencies]
-mypy = ">=1.0.0,<1.13.0"
+mypy = ">=1.0.0,<1.14.0"
 "zope.interface" = "*"
 "zope.schema" = "*"
 
@@ -1395,6 +1535,7 @@ version = "1.3.0"
 description = "A network address manipulation library for Python"
 optional = false
 python-versions = ">=3.7"
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 files = [
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 optional = true
 python-versions = "*"
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 python-versions = ">=3.7"
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 optional = false
 python-versions = "*"
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 ]
 
 [package.extras]
-docs = ["furo", "olefile", "sphinx (>=7.3)", "sphinx-copybutton", "sphinx-inline-tabs", "sphinxext-opengraph"]
+docs = ["furo", "olefile", "sphinx (>=8.1)", "sphinx-copybutton", "sphinx-inline-tabs", "sphinxext-opengraph"]
 fpx = ["olefile"]
 mic = ["olefile"]
-tests = ["check-manifest", "coverage", "defusedxml", "markdown2", "olefile", "packaging", "pyroma", "pytest", "pytest-cov", "pytest-timeout"]
-typing = ["typing-extensions"]
+tests = ["check-manifest", "coverage (>=7.4.2)", "defusedxml", "markdown2", "olefile", "packaging", "pyroma", "pytest", "pytest-cov", "pytest-timeout", "trove-classifiers (>=2024.10.12)"]
+typing = ["typing-extensions ; python_version < \"3.10\""]
 xmp = ["defusedxml"]
 
-[[package]]
-name = "pkginfo"
-version = "1.9.6"
-description = "Query metadata from sdists / bdists / installed packages."
-optional = false
-python-versions = ">=3.6"
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-]
-
-[package.extras]
-testing = ["pytest", "pytest-cov"]
-
 [[package]]
 name = "prometheus-client"
 version = "0.21.0"
 description = "Python client for the Prometheus monitoring system."
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
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@@ -1583,6 +1708,8 @@ version = "2.9.10"
 description = "psycopg2 - Python-PostgreSQL Database Adapter"
 optional = true
 python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"postgres\" or extra == \"all\""
 files = [
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@@ -1590,6 +1717,7 @@ files = [
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@@ -1601,6 +1729,8 @@ version = "2.9.0"
 description = ".. image:: https://travis-ci.org/chtd/psycopg2cffi.svg?branch=master"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "platform_python_implementation == \"PyPy\" and (extra == \"postgres\" or extra == \"all\")"
 files = [
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 ]
@@ -1615,6 +1745,8 @@ version = "1.1"
 description = "A Simple library to enable psycopg2 compatability"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "platform_python_implementation == \"PyPy\" and (extra == \"postgres\" or extra == \"all\")"
 files = [
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 ]
@@ -1628,6 +1760,7 @@ version = "0.6.1"
 description = "Pure-Python implementation of ASN.1 types and DER/BER/CER codecs (X.208)"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
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@@ -1639,6 +1772,7 @@ version = "0.4.1"
 description = "A collection of ASN.1-based protocols modules"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
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 description = "C parser in Python"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+groups = ["main", "dev"]
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@@ -1660,123 +1795,133 @@ files = [
 
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+version = "2.10.3"
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 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
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+typing-extensions = ">=4.12.2"
 
 [package.extras]
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-timezone = ["tzdata"]
+timezone = ["tzdata ; python_version >= \"3.9\" and platform_system == \"Windows\""]
 
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+    {file = "pydantic_core-2.27.1-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:62ba45e21cf6571d7f716d903b5b7b6d2617e2d5d67c0923dc47b9d41369f840"},
+    {file = "pydantic_core-2.27.1.tar.gz", hash = "sha256:62a763352879b84aa31058fc931884055fd75089cccbd9d58bb6afd01141b235"},
 ]
 
 [package.dependencies]
@@ -1788,6 +1933,7 @@ version = "2.5.0"
 description = "Use the full Github API v3"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "PyGithub-2.5.0-py3-none-any.whl", hash = "sha256:b0b635999a658ab8e08720bdd3318893ff20e2275f6446fcf35bf3f44f2c0fd2"},
     {file = "pygithub-2.5.0.tar.gz", hash = "sha256:e1613ac508a9be710920d26eb18b1905ebd9926aa49398e88151c1b526aad3cf"},
@@ -1807,22 +1953,25 @@ version = "2.15.1"
 description = "Pygments is a syntax highlighting package written in Python."
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "Pygments-2.15.1-py3-none-any.whl", hash = "sha256:db2db3deb4b4179f399a09054b023b6a586b76499d36965813c71aa8ed7b5fd1"},
     {file = "Pygments-2.15.1.tar.gz", hash = "sha256:8ace4d3c1dd481894b2005f560ead0f9f19ee64fe983366be1a21e171d12775c"},
 ]
 
 [package.extras]
-plugins = ["importlib-metadata"]
+plugins = ["importlib-metadata ; python_version < \"3.8\""]
 
 [[package]]
 name = "pyicu"
-version = "2.13.1"
+version = "2.14"
 description = "Python extension wrapping the ICU C++ API"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"user-search\" or extra == \"all\""
 files = [
-    {file = "PyICU-2.13.1.tar.gz", hash = "sha256:d4919085eaa07da12bade8ee721e7bbf7ade0151ca0f82946a26c8f4b98cdceb"},
+    {file = "PyICU-2.14.tar.gz", hash = "sha256:acc7eb92bd5c554ed577249c6978450a4feda0aa6f01470152b3a7b382a02132"},
 ]
 
 [[package]]
@@ -1831,6 +1980,7 @@ version = "2.6.0"
 description = "JSON Web Token implementation in Python"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "PyJWT-2.6.0-py3-none-any.whl", hash = "sha256:d83c3d892a77bbb74d3e1a2cfa90afaadb60945205d1095d9221f04466f64c14"},
     {file = "PyJWT-2.6.0.tar.gz", hash = "sha256:69285c7e31fc44f68a1feb309e948e0df53259d579295e6cfe2b1792329f05fd"},
@@ -1851,6 +2001,7 @@ version = "0.13.0"
 description = "Macaroon library for Python"
 optional = false
 python-versions = "*"
+groups = ["main"]
 files = [
     {file = "pymacaroons-0.13.0-py2.py3-none-any.whl", hash = "sha256:3e14dff6a262fdbf1a15e769ce635a8aea72e6f8f91e408f9a97166c53b91907"},
     {file = "pymacaroons-0.13.0.tar.gz", hash = "sha256:1e6bba42a5f66c245adf38a5a4006a99dcc06a0703786ea636098667d42903b8"},
@@ -1866,6 +2017,8 @@ version = "1.0.1"
 description = "A development tool to measure, monitor and analyze the memory behavior of Python objects."
 optional = true
 python-versions = ">=3.6"
+groups = ["main"]
+markers = "extra == \"cache-memory\" or extra == \"all\""
 files = [
     {file = "Pympler-1.0.1-py3-none-any.whl", hash = "sha256:d260dda9ae781e1eab6ea15bacb84015849833ba5555f141d2d9b7b7473b307d"},
     {file = "Pympler-1.0.1.tar.gz", hash = "sha256:993f1a3599ca3f4fcd7160c7545ad06310c9e12f70174ae7ae8d4e25f6c5d3fa"},
@@ -1877,6 +2030,7 @@ version = "1.5.0"
 description = "Python binding to the Networking and Cryptography (NaCl) library"
 optional = false
 python-versions = ">=3.6"
+groups = ["main", "dev"]
 files = [
     {file = "PyNaCl-1.5.0-cp36-abi3-macosx_10_10_universal2.whl", hash = "sha256:401002a4aaa07c9414132aaed7f6836ff98f59277a234704ff66878c2ee4a0d1"},
     {file = "PyNaCl-1.5.0-cp36-abi3-manylinux_2_17_aarch64.manylinux2014_aarch64.manylinux_2_24_aarch64.whl", hash = "sha256:52cb72a79269189d4e0dc537556f4740f7f0a9ec41c1322598799b0bdad4ef92"},
@@ -1899,31 +2053,34 @@ tests = ["hypothesis (>=3.27.0)", "pytest (>=3.2.1,!=3.3.0)"]
 
 [[package]]
 name = "pyopenssl"
-version = "24.2.1"
+version = "24.3.0"
 description = "Python wrapper module around the OpenSSL library"
 optional = false
 python-versions = ">=3.7"
+groups = ["main"]
 files = [
-    {file = "pyOpenSSL-24.2.1-py3-none-any.whl", hash = "sha256:967d5719b12b243588573f39b0c677637145c7a1ffedcd495a487e58177fbb8d"},
-    {file = "pyopenssl-24.2.1.tar.gz", hash = "sha256:4247f0dbe3748d560dcbb2ff3ea01af0f9a1a001ef5f7c4c647956ed8cbf0e95"},
+    {file = "pyOpenSSL-24.3.0-py3-none-any.whl", hash = "sha256:e474f5a473cd7f92221cc04976e48f4d11502804657a08a989fb3be5514c904a"},
+    {file = "pyopenssl-24.3.0.tar.gz", hash = "sha256:49f7a019577d834746bc55c5fce6ecbcec0f2b4ec5ce1cf43a9a173b8138bb36"},
 ]
 
 [package.dependencies]
-cryptography = ">=41.0.5,<44"
+cryptography = ">=41.0.5,<45"
 
 [package.extras]
-docs = ["sphinx (!=5.2.0,!=5.2.0.post0,!=7.2.5)", "sphinx-rtd-theme"]
+docs = ["sphinx (!=5.2.0,!=5.2.0.post0,!=7.2.5)", "sphinx_rtd_theme"]
 test = ["pretend", "pytest (>=3.0.1)", "pytest-rerunfailures"]
 
 [[package]]
 name = "pysaml2"
-version = "7.3.1"
+version = "7.5.0"
 description = "Python implementation of SAML Version 2 Standard"
 optional = true
-python-versions = ">=3.6.2,<4.0.0"
+python-versions = ">=3.9,<4.0"
+groups = ["main"]
+markers = "extra == \"saml2\" or extra == \"all\""
 files = [
-    {file = "pysaml2-7.3.1-py3-none-any.whl", hash = "sha256:2cc66e7a371d3f5ff9601f0ed93b5276cca816fce82bb38447d5a0651f2f5193"},
-    {file = "pysaml2-7.3.1.tar.gz", hash = "sha256:eab22d187c6dd7707c58b5bb1688f9b8e816427667fc99d77f54399e15cd0a0a"},
+    {file = "pysaml2-7.5.0-py3-none-any.whl", hash = "sha256:bc6627cc344476a83c757f440a73fda1369f13b6fda1b4e16bca63ffbabb5318"},
+    {file = "pysaml2-7.5.0.tar.gz", hash = "sha256:f36871d4e5ee857c6b85532e942550d2cf90ea4ee943d75eb681044bbc4f54f7"},
 ]
 
 [package.dependencies]
@@ -1933,7 +2090,7 @@ pyopenssl = "*"
 python-dateutil = "*"
 pytz = "*"
 requests = ">=2,<3"
-xmlschema = ">=1.2.1"
+xmlschema = ">=2,<3"
 
 [package.extras]
 s2repoze = ["paste", "repoze.who", "zope.interface"]
@@ -1944,6 +2101,8 @@ version = "2.8.2"
 description = "Extensions to the standard Python datetime module"
 optional = true
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+groups = ["main"]
+markers = "extra == \"saml2\" or extra == \"all\""
 files = [
     {file = "python-dateutil-2.8.2.tar.gz", hash = "sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86"},
     {file = "python_dateutil-2.8.2-py2.py3-none-any.whl", hash = "sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9"},
@@ -1954,13 +2113,14 @@ six = ">=1.5"
 
 [[package]]
 name = "python-multipart"
-version = "0.0.16"
+version = "0.0.20"
 description = "A streaming multipart parser for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
-    {file = "python_multipart-0.0.16-py3-none-any.whl", hash = "sha256:c2759b7b976ef3937214dfb592446b59dfaa5f04682a076f78b117c94776d87a"},
-    {file = "python_multipart-0.0.16.tar.gz", hash = "sha256:8dee37b88dab9b59922ca173c35acb627cc12ec74019f5cd4578369c6df36554"},
+    {file = "python_multipart-0.0.20-py3-none-any.whl", hash = "sha256:8a62d3a8335e06589fe01f2a3e178cdcc632f3fbe0d492ad9ee0ec35aab1f104"},
+    {file = "python_multipart-0.0.20.tar.gz", hash = "sha256:8dd0cab45b8e23064ae09147625994d090fa46f5b0d1e13af944c331a7fa9d13"},
 ]
 
 [[package]]
@@ -1969,6 +2129,8 @@ version = "2022.7.1"
 description = "World timezone definitions, modern and historical"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"saml2\" or extra == \"all\""
 files = [
     {file = "pytz-2022.7.1-py2.py3-none-any.whl", hash = "sha256:78f4f37d8198e0627c5f1143240bb0206b8691d8d7ac6d78fee88b78733f8c4a"},
     {file = "pytz-2022.7.1.tar.gz", hash = "sha256:01a0681c4b9684a28304615eba55d1ab31ae00bf68ec157ec3708a8182dbbcd0"},
@@ -1980,6 +2142,8 @@ version = "0.2.0"
 description = ""
 optional = false
 python-versions = "*"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\" and sys_platform == \"win32\""
 files = [
     {file = "pywin32-ctypes-0.2.0.tar.gz", hash = "sha256:24ffc3b341d457d48e8922352130cf2644024a4ff09762a2261fd34c36ee5942"},
     {file = "pywin32_ctypes-0.2.0-py2.py3-none-any.whl", hash = "sha256:9dc2d991b3479cc2df15930958b674a48a227d5361d413827a4cfd0b5876fc98"},
@@ -1991,6 +2155,7 @@ version = "6.0.2"
 description = "YAML parser and emitter for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
     {file = "PyYAML-6.0.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:0a9a2848a5b7feac301353437eb7d5957887edbf81d56e903999a75a3d743086"},
     {file = "PyYAML-6.0.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:29717114e51c84ddfba879543fb232a6ed60086602313ca38cce623c1d62cfbf"},
@@ -2053,6 +2218,7 @@ version = "37.3"
 description = "readme_renderer is a library for rendering \"readme\" descriptions for Warehouse"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "readme_renderer-37.3-py3-none-any.whl", hash = "sha256:f67a16caedfa71eef48a31b39708637a6f4664c4394801a7b0d6432d13907343"},
     {file = "readme_renderer-37.3.tar.gz", hash = "sha256:cd653186dfc73055656f090f227f5cb22a046d7f71a841dfa305f55c9a513273"},
@@ -2072,6 +2238,7 @@ version = "0.29.1"
 description = "JSON Referencing + Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "referencing-0.29.1-py3-none-any.whl", hash = "sha256:d3c8f323ee1480095da44d55917cfb8278d73d6b4d5f677e3e40eb21314ac67f"},
     {file = "referencing-0.29.1.tar.gz", hash = "sha256:90cb53782d550ba28d2166ef3f55731f38397def8832baac5d45235f1995e35e"},
@@ -2087,6 +2254,7 @@ version = "2.32.2"
 description = "Python HTTP for Humans."
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "requests-2.32.2-py3-none-any.whl", hash = "sha256:fc06670dd0ed212426dfeb94fc1b983d917c4f9847c863f313c9dfaaffb7c23c"},
     {file = "requests-2.32.2.tar.gz", hash = "sha256:dd951ff5ecf3e3b3aa26b40703ba77495dab41da839ae72ef3c8e5d8e2433289"},
@@ -2108,6 +2276,7 @@ version = "1.0.0"
 description = "A utility belt for advanced users of python-requests"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+groups = ["dev"]
 files = [
     {file = "requests-toolbelt-1.0.0.tar.gz", hash = "sha256:7681a0a3d047012b5bdc0ee37d7f8f07ebe76ab08caeccfc3921ce23c88d5bc6"},
     {file = "requests_toolbelt-1.0.0-py2.py3-none-any.whl", hash = "sha256:cccfdd665f0a24fcf4726e690f65639d272bb0637b9b92dfd91a5568ccf6bd06"},
@@ -2122,6 +2291,7 @@ version = "2.0.0"
 description = "Validating URI References per RFC 3986"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "rfc3986-2.0.0-py2.py3-none-any.whl", hash = "sha256:50b1502b60e289cb37883f3dfd34532b8873c7de9f49bb546641ce9cbd256ebd"},
     {file = "rfc3986-2.0.0.tar.gz", hash = "sha256:97aacf9dbd4bfd829baad6e6309fa6573aaf1be3f6fa735c8ab05e46cecb261c"},
@@ -2136,6 +2306,7 @@ version = "13.3.2"
 description = "Render rich text, tables, progress bars, syntax highlighting, markdown and more to the terminal"
 optional = false
 python-versions = ">=3.7.0"
+groups = ["dev"]
 files = [
     {file = "rich-13.3.2-py3-none-any.whl", hash = "sha256:a104f37270bf677148d8acb07d33be1569eeee87e2d1beb286a4e9113caf6f2f"},
     {file = "rich-13.3.2.tar.gz", hash = "sha256:91954fe80cfb7985727a467ca98a7618e5dd15178cc2da10f553b36a93859001"},
@@ -2154,6 +2325,7 @@ version = "0.8.10"
 description = "Python bindings to Rust's persistent data structures (rpds)"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "rpds_py-0.8.10-cp310-cp310-macosx_10_7_x86_64.whl", hash = "sha256:93d06cccae15b3836247319eee7b6f1fdcd6c10dabb4e6d350d27bd0bdca2711"},
     {file = "rpds_py-0.8.10-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:3816a890a6a9e9f1de250afa12ca71c9a7a62f2b715a29af6aaee3aea112c181"},
@@ -2260,6 +2432,7 @@ version = "0.7.3"
 description = "An extremely fast Python linter and code formatter, written in Rust."
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "ruff-0.7.3-py3-none-linux_armv6l.whl", hash = "sha256:34f2339dc22687ec7e7002792d1f50712bf84a13d5152e75712ac08be565d344"},
     {file = "ruff-0.7.3-py3-none-macosx_10_12_x86_64.whl", hash = "sha256:fb397332a1879b9764a3455a0bb1087bda876c2db8aca3a3cbb67b3dbce8cda0"},
@@ -2287,6 +2460,8 @@ version = "3.3.3"
 description = "Python bindings to FreeDesktop.org Secret Service API"
 optional = false
 python-versions = ">=3.6"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\" and sys_platform == \"linux\""
 files = [
     {file = "SecretStorage-3.3.3-py3-none-any.whl", hash = "sha256:f356e6628222568e3af06f2eba8df495efa13b3b63081dafd4f7d9a7b7bc9f99"},
     {file = "SecretStorage-3.3.3.tar.gz", hash = "sha256:2403533ef369eca6d2ba81718576c5e0f564d5cca1b58f73a8b23e7d4eeebd77"},
@@ -2302,24 +2477,27 @@ version = "2.10.0"
 description = "A library implementing the 'SemVer' scheme."
 optional = false
 python-versions = ">=2.7"
+groups = ["main"]
 files = [
     {file = "semantic_version-2.10.0-py2.py3-none-any.whl", hash = "sha256:de78a3b8e0feda74cabc54aab2da702113e33ac9d9eb9d2389bcf1f58b7d9177"},
     {file = "semantic_version-2.10.0.tar.gz", hash = "sha256:bdabb6d336998cbb378d4b9db3a4b56a1e3235701dc05ea2690d9a997ed5041c"},
 ]
 
 [package.extras]
-dev = ["Django (>=1.11)", "check-manifest", "colorama (<=0.4.1)", "coverage", "flake8", "nose2", "readme-renderer (<25.0)", "tox", "wheel", "zest.releaser[recommended]"]
+dev = ["Django (>=1.11)", "check-manifest", "colorama (<=0.4.1) ; python_version == \"3.4\"", "coverage", "flake8", "nose2", "readme-renderer (<25.0) ; python_version == \"3.4\"", "tox", "wheel", "zest.releaser[recommended]"]
 doc = ["Sphinx", "sphinx-rtd-theme"]
 
 [[package]]
 name = "sentry-sdk"
-version = "2.17.0"
+version = "2.22.0"
 description = "Python client for Sentry (https://sentry.io)"
 optional = true
 python-versions = ">=3.6"
+groups = ["main"]
+markers = "extra == \"sentry\" or extra == \"all\""
 files = [
-    {file = "sentry_sdk-2.17.0-py2.py3-none-any.whl", hash = "sha256:625955884b862cc58748920f9e21efdfb8e0d4f98cca4ab0d3918576d5b606ad"},
-    {file = "sentry_sdk-2.17.0.tar.gz", hash = "sha256:dd0a05352b78ffeacced73a94e86f38b32e2eae15fff5f30ca5abb568a72eacf"},
+    {file = "sentry_sdk-2.22.0-py2.py3-none-any.whl", hash = "sha256:3d791d631a6c97aad4da7074081a57073126c69487560c6f8bffcf586461de66"},
+    {file = "sentry_sdk-2.22.0.tar.gz", hash = "sha256:b4bf43bb38f547c84b2eadcefbe389b36ef75f3f38253d7a74d6b928c07ae944"},
 ]
 
 [package.dependencies]
@@ -2345,14 +2523,16 @@ grpcio = ["grpcio (>=1.21.1)", "protobuf (>=3.8.0)"]
 http2 = ["httpcore[http2] (==1.*)"]
 httpx = ["httpx (>=0.16.0)"]
 huey = ["huey (>=2)"]
-huggingface-hub = ["huggingface-hub (>=0.22)"]
+huggingface-hub = ["huggingface_hub (>=0.22)"]
 langchain = ["langchain (>=0.0.210)"]
+launchdarkly = ["launchdarkly-server-sdk (>=9.8.0)"]
 litestar = ["litestar (>=2.0.0)"]
 loguru = ["loguru (>=0.5)"]
 openai = ["openai (>=1.0.0)", "tiktoken (>=0.3.0)"]
+openfeature = ["openfeature-sdk (>=0.7.1)"]
 opentelemetry = ["opentelemetry-distro (>=0.35b0)"]
 opentelemetry-experimental = ["opentelemetry-distro"]
-pure-eval = ["asttokens", "executing", "pure-eval"]
+pure-eval = ["asttokens", "executing", "pure_eval"]
 pymongo = ["pymongo (>=3.1)"]
 pyspark = ["pyspark (>=2.4.4)"]
 quart = ["blinker (>=1.1)", "quart (>=0.16.1)"]
@@ -2361,17 +2541,20 @@ sanic = ["sanic (>=0.8)"]
 sqlalchemy = ["sqlalchemy (>=1.2)"]
 starlette = ["starlette (>=0.19.1)"]
 starlite = ["starlite (>=1.48)"]
+statsig = ["statsig (>=0.55.3)"]
 tornado = ["tornado (>=6)"]
+unleash = ["UnleashClient (>=6.0.1)"]
 
 [[package]]
 name = "service-identity"
-version = "24.1.0"
+version = "24.2.0"
 description = "Service identity verification for pyOpenSSL & cryptography."
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
-    {file = "service_identity-24.1.0-py3-none-any.whl", hash = "sha256:a28caf8130c8a5c1c7a6f5293faaf239bbfb7751e4862436920ee6f2616f568a"},
-    {file = "service_identity-24.1.0.tar.gz", hash = "sha256:6829c9d62fb832c2e1c435629b0a8c476e1929881f28bee4d20bc24161009221"},
+    {file = "service_identity-24.2.0-py3-none-any.whl", hash = "sha256:6b047fbd8a84fd0bb0d55ebce4031e400562b9196e1e0d3e0fe2b8a59f6d4a85"},
+    {file = "service_identity-24.2.0.tar.gz", hash = "sha256:b8683ba13f0d39c6cd5d625d2c5f65421d6d707b013b375c355751557cbe8e09"},
 ]
 
 [package.dependencies]
@@ -2381,7 +2564,7 @@ pyasn1 = "*"
 pyasn1-modules = "*"
 
 [package.extras]
-dev = ["pyopenssl", "service-identity[idna,mypy,tests]"]
+dev = ["coverage[toml] (>=5.0.2)", "idna", "mypy", "pyopenssl", "pytest", "types-pyopenssl"]
 docs = ["furo", "myst-parser", "pyopenssl", "sphinx", "sphinx-notfound-page"]
 idna = ["idna"]
 mypy = ["idna", "mypy", "types-pyopenssl"]
@@ -2393,31 +2576,32 @@ version = "72.1.0"
 description = "Easily download, build, install, upgrade, and uninstall Python packages"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "setuptools-72.1.0-py3-none-any.whl", hash = "sha256:5a03e1860cf56bb6ef48ce186b0e557fdba433237481a9a625176c2831be15d1"},
     {file = "setuptools-72.1.0.tar.gz", hash = "sha256:8d243eff56d095e5817f796ede6ae32941278f542e0f941867cc05ae52b162ec"},
 ]
 
 [package.extras]
-core = ["importlib-metadata (>=6)", "importlib-resources (>=5.10.2)", "jaraco.text (>=3.7)", "more-itertools (>=8.8)", "ordered-set (>=3.1.1)", "packaging (>=24)", "platformdirs (>=2.6.2)", "tomli (>=2.0.1)", "wheel (>=0.43.0)"]
+core = ["importlib-metadata (>=6) ; python_version < \"3.10\"", "importlib-resources (>=5.10.2) ; python_version < \"3.9\"", "jaraco.text (>=3.7)", "more-itertools (>=8.8)", "ordered-set (>=3.1.1)", "packaging (>=24)", "platformdirs (>=2.6.2)", "tomli (>=2.0.1) ; python_version < \"3.11\"", "wheel (>=0.43.0)"]
 doc = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "pygments-github-lexers (==0.0.5)", "pyproject-hooks (!=1.1)", "rst.linker (>=1.9)", "sphinx (>=3.5)", "sphinx-favicon", "sphinx-inline-tabs", "sphinx-lint", "sphinx-notfound-page (>=1,<2)", "sphinx-reredirects", "sphinxcontrib-towncrier"]
-test = ["build[virtualenv] (>=1.0.3)", "filelock (>=3.4.0)", "importlib-metadata", "ini2toml[lite] (>=0.14)", "jaraco.develop (>=7.21)", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "jaraco.test", "mypy (==1.11.*)", "packaging (>=23.2)", "pip (>=19.1)", "pyproject-hooks (!=1.1)", "pytest (>=6,!=8.1.*)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-home (>=0.5)", "pytest-mypy", "pytest-perf", "pytest-ruff (<0.4)", "pytest-ruff (>=0.2.1)", "pytest-ruff (>=0.3.2)", "pytest-subprocess", "pytest-timeout", "pytest-xdist (>=3)", "tomli", "tomli-w (>=1.0.0)", "virtualenv (>=13.0.0)", "wheel"]
+test = ["build[virtualenv] (>=1.0.3)", "filelock (>=3.4.0)", "importlib-metadata", "ini2toml[lite] (>=0.14)", "jaraco.develop (>=7.21) ; python_version >= \"3.9\" and sys_platform != \"cygwin\"", "jaraco.envs (>=2.2)", "jaraco.path (>=3.2.0)", "jaraco.test", "mypy (==1.11.*)", "packaging (>=23.2)", "pip (>=19.1)", "pyproject-hooks (!=1.1)", "pytest (>=6,!=8.1.*)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-home (>=0.5)", "pytest-mypy", "pytest-perf ; sys_platform != \"cygwin\"", "pytest-ruff (<0.4) ; platform_system == \"Windows\"", "pytest-ruff (>=0.2.1) ; sys_platform != \"cygwin\"", "pytest-ruff (>=0.3.2) ; sys_platform != \"cygwin\"", "pytest-subprocess", "pytest-timeout", "pytest-xdist (>=3)", "tomli", "tomli-w (>=1.0.0)", "virtualenv (>=13.0.0)", "wheel"]
 
 [[package]]
 name = "setuptools-rust"
-version = "1.8.1"
+version = "1.10.2"
 description = "Setuptools Rust extension plugin"
 optional = false
 python-versions = ">=3.8"
+groups = ["main"]
 files = [
-    {file = "setuptools-rust-1.8.1.tar.gz", hash = "sha256:94b1dd5d5308b3138d5b933c3a2b55e6d6927d1a22632e509fcea9ddd0f7e486"},
-    {file = "setuptools_rust-1.8.1-py3-none-any.whl", hash = "sha256:b5324493949ccd6aa0c03890c5f6b5f02de4512e3ac1697d02e9a6c02b18aa8e"},
+    {file = "setuptools_rust-1.10.2-py3-none-any.whl", hash = "sha256:4b39c435ae9670315d522ed08fa0e8cb29f2a6048033966b6be2571a90ce4f1c"},
+    {file = "setuptools_rust-1.10.2.tar.gz", hash = "sha256:5d73e7eee5f87a6417285b617c97088a7c20d1a70fcea60e3bdc94ff567c29dc"},
 ]
 
 [package.dependencies]
 semantic-version = ">=2.8.2,<3"
 setuptools = ">=62.4"
-tomli = {version = ">=1.2.1", markers = "python_version < \"3.11\""}
 
 [[package]]
 name = "signedjson"
@@ -2425,6 +2609,7 @@ version = "1.1.4"
 description = "Sign JSON with Ed25519 signatures"
 optional = false
 python-versions = "*"
+groups = ["main"]
 files = [
     {file = "signedjson-1.1.4-py3-none-any.whl", hash = "sha256:45569ec54241c65d2403fe3faf7169be5322547706a231e884ca2b427f23d228"},
     {file = "signedjson-1.1.4.tar.gz", hash = "sha256:cd91c56af53f169ef032c62e9c4a3292dc158866933318d0592e3462db3d6492"},
@@ -2444,6 +2629,7 @@ version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+groups = ["main"]
 files = [
     {file = "six-1.16.0-py2.py3-none-any.whl", hash = "sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254"},
     {file = "six-1.16.0.tar.gz", hash = "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926"},
@@ -2455,6 +2641,7 @@ version = "5.0.0"
 description = "A pure Python implementation of a sliding window memory map manager"
 optional = false
 python-versions = ">=3.6"
+groups = ["dev"]
 files = [
     {file = "smmap-5.0.0-py3-none-any.whl", hash = "sha256:2aba19d6a040e78d8b09de5c57e96207b09ed71d8e55ce0959eeee6c8e190d94"},
     {file = "smmap-5.0.0.tar.gz", hash = "sha256:c840e62059cd3be204b0c9c9f74be2c09d5648eddd4580d9314c3ecde0b30936"},
@@ -2466,6 +2653,7 @@ version = "2.4.0"
 description = "Sorted Containers -- Sorted List, Sorted Dict, Sorted Set"
 optional = false
 python-versions = "*"
+groups = ["main"]
 files = [
     {file = "sortedcontainers-2.4.0-py2.py3-none-any.whl", hash = "sha256:a163dcaede0f1c021485e957a39245190e74249897e2ae4b2aa38595db237ee0"},
     {file = "sortedcontainers-2.4.0.tar.gz", hash = "sha256:25caa5a06cc30b6b83d11423433f65d1f9d76c4c6a0c90e3379eaa43b9bfdb88"},
@@ -2477,6 +2665,8 @@ version = "235"
 description = "Python interface for libsystemd"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"systemd\""
 files = [
     {file = "systemd-python-235.tar.gz", hash = "sha256:4e57f39797fd5d9e2d22b8806a252d7c0106c936039d1e71c8c6b8008e695c0a"},
 ]
@@ -2487,6 +2677,8 @@ version = "1.0.2"
 description = "Tornado IOLoop Backed Concurrent Futures"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"opentracing\" or extra == \"all\""
 files = [
     {file = "threadloop-1.0.2-py2-none-any.whl", hash = "sha256:5c90dbefab6ffbdba26afb4829d2a9df8275d13ac7dc58dccb0e279992679599"},
     {file = "threadloop-1.0.2.tar.gz", hash = "sha256:8b180aac31013de13c2ad5c834819771992d350267bddb854613ae77ef571944"},
@@ -2501,6 +2693,8 @@ version = "0.16.0"
 description = "Python bindings for the Apache Thrift RPC system"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"opentracing\" or extra == \"all\""
 files = [
     {file = "thrift-0.16.0.tar.gz", hash = "sha256:2b5b6488fcded21f9d312aa23c9ff6a0195d0f6ae26ddbd5ad9e3e25dfc14408"},
 ]
@@ -2515,33 +2709,66 @@ twisted = ["twisted"]
 
 [[package]]
 name = "tomli"
-version = "2.0.2"
+version = "2.2.1"
 description = "A lil' TOML parser"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
-    {file = "tomli-2.0.2-py3-none-any.whl", hash = "sha256:2ebe24485c53d303f690b0ec092806a085f07af5a5aa1464f3931eec36caaa38"},
-    {file = "tomli-2.0.2.tar.gz", hash = "sha256:d46d457a85337051c36524bc5349dd91b1877838e2979ac5ced3e710ed8a60ed"},
+    {file = "tomli-2.2.1-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:678e4fa69e4575eb77d103de3df8a895e1591b48e740211bd1067378c69e8249"},
+    {file = "tomli-2.2.1-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:023aa114dd824ade0100497eb2318602af309e5a55595f76b626d6d9f3b7b0a6"},
+    {file = "tomli-2.2.1-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:ece47d672db52ac607a3d9599a9d48dcb2f2f735c6c2d1f34130085bb12b112a"},
+    {file = "tomli-2.2.1-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6972ca9c9cc9f0acaa56a8ca1ff51e7af152a9f87fb64623e31d5c83700080ee"},
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+    {file = "tomli-2.2.1.tar.gz", hash = "sha256:cd45e1dc79c835ce60f7404ec8119f2eb06d38b1deba146f07ced3bbc44505ff"},
 ]
 
 [[package]]
 name = "tornado"
-version = "6.4.1"
+version = "6.4.2"
 description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
 optional = true
 python-versions = ">=3.8"
+groups = ["main"]
+markers = "extra == \"opentracing\" or extra == \"all\""
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 ]
 
 [[package]]
@@ -2550,6 +2777,7 @@ version = "24.8.0"
 description = "Building newsfiles for your project."
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "towncrier-24.8.0-py3-none-any.whl", hash = "sha256:9343209592b839209cdf28c339ba45792fbfe9775b5f9c177462fd693e127d8d"},
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@@ -2571,6 +2799,7 @@ version = "24.9.1"
 description = "High-level Twisted HTTP Client API"
 optional = false
 python-versions = ">=3.7"
+groups = ["main"]
 files = [
     {file = "treq-24.9.1-py3-none-any.whl", hash = "sha256:eee4756fd9a857c77f180fd5202b52c518f2d3e2826dce28b89066c03bfc45d0"},
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@@ -2590,19 +2819,21 @@ docs = ["sphinx (<7.0.0)"]
 
 [[package]]
 name = "twine"
-version = "5.1.1"
+version = "6.1.0"
 description = "Collection of utilities for publishing packages on PyPI"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
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+    {file = "twine-6.1.0-py3-none-any.whl", hash = "sha256:a47f973caf122930bf0fbbf17f80b83bc1602c9ce393c7845f289a3001dc5384"},
+    {file = "twine-6.1.0.tar.gz", hash = "sha256:be324f6272eff91d07ee93f251edf232fc647935dd585ac003539b42404a8dbd"},
 ]
 
 [package.dependencies]
-importlib-metadata = ">=3.6"
-keyring = ">=15.1"
-pkginfo = ">=1.8.1,<1.11"
+id = "*"
+importlib-metadata = {version = ">=3.6", markers = "python_version < \"3.10\""}
+keyring = {version = ">=15.1", markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\""}
+packaging = ">=24.0"
 readme-renderer = ">=35.0"
 requests = ">=2.20"
 requests-toolbelt = ">=0.8.0,<0.9.0 || >0.9.0"
@@ -2610,12 +2841,16 @@ rfc3986 = ">=1.4.0"
 rich = ">=12.0.0"
 urllib3 = ">=1.26.0"
 
+[package.extras]
+keyring = ["keyring (>=15.1)"]
+
 [[package]]
 name = "twisted"
 version = "24.7.0"
 description = "An asynchronous networking framework written in Python"
 optional = false
 python-versions = ">=3.8.0"
+groups = ["main"]
 files = [
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@@ -2634,19 +2869,19 @@ typing-extensions = ">=4.2.0"
 zope-interface = ">=5"
 
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+all-non-platform = ["appdirs (>=1.4.0)", "appdirs (>=1.4.0)", "bcrypt (>=3.1.3)", "bcrypt (>=3.1.3)", "cryptography (>=3.3)", "cryptography (>=3.3)", "cython-test-exception-raiser (>=1.0.2,<2)", "cython-test-exception-raiser (>=1.0.2,<2)", "h2 (>=3.0,<5.0)", "h2 (>=3.0,<5.0)", "hypothesis (>=6.56)", "hypothesis (>=6.56)", "idna (>=2.4)", "idna (>=2.4)", "priority (>=1.1.0,<2.0)", "priority (>=1.1.0,<2.0)", "pyhamcrest (>=2)", "pyhamcrest (>=2)", "pyopenssl (>=21.0.0)", "pyopenssl (>=21.0.0)", "pyserial (>=3.0)", "pyserial (>=3.0)", "pywin32 (!=226) ; platform_system == \"Windows\"", "pywin32 (!=226) ; platform_system == \"Windows\"", "service-identity (>=18.1.0)", "service-identity (>=18.1.0)"]
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-serial = ["pyserial (>=3.0)", "pywin32 (!=226)"]
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 test = ["cython-test-exception-raiser (>=1.0.2,<2)", "hypothesis (>=6.56)", "pyhamcrest (>=2)"]
 tls = ["idna (>=2.4)", "pyopenssl (>=21.0.0)", "service-identity (>=18.1.0)"]
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 [[package]]
 name = "txredisapi"
@@ -2654,6 +2889,8 @@ version = "1.4.10"
 description = "non-blocking redis client for python"
 optional = true
 python-versions = "*"
+groups = ["main"]
+markers = "extra == \"redis\" or extra == \"all\""
 files = [
     {file = "txredisapi-1.4.10-py3-none-any.whl", hash = "sha256:0a6ea77f27f8cf092f907654f08302a97b48fa35f24e0ad99dfb74115f018161"},
     {file = "txredisapi-1.4.10.tar.gz", hash = "sha256:7609a6af6ff4619a3189c0adfb86aeda789afba69eb59fc1e19ac0199e725395"},
@@ -2665,13 +2902,14 @@ twisted = "*"
 
 [[package]]
 name = "types-bleach"
-version = "6.1.0.20240331"
+version = "6.2.0.20241123"
 description = "Typing stubs for bleach"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
-    {file = "types-bleach-6.1.0.20240331.tar.gz", hash = "sha256:2ee858a84fb06fc2225ff56ba2f7f6c88b65638659efae0d7bfd6b24a1b5a524"},
-    {file = "types_bleach-6.1.0.20240331-py3-none-any.whl", hash = "sha256:399bc59bfd20a36a56595f13f805e56c8a08e5a5c07903e5cf6fafb5a5107dd4"},
+    {file = "types_bleach-6.2.0.20241123-py3-none-any.whl", hash = "sha256:c6e58b3646665ca7c6b29890375390f4569e84f0cf5c171e0fe1ddb71a7be86a"},
+    {file = "types_bleach-6.2.0.20241123.tar.gz", hash = "sha256:dac5fe9015173514da3ac810c1a935619a3ccbcc5d66c4cbf4707eac00539057"},
 ]
 
 [package.dependencies]
@@ -2683,6 +2921,7 @@ version = "1.16.0.20240331"
 description = "Typing stubs for cffi"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-cffi-1.16.0.20240331.tar.gz", hash = "sha256:b8b20d23a2b89cfed5f8c5bc53b0cb8677c3aac6d970dbc771e28b9c698f5dee"},
     {file = "types_cffi-1.16.0.20240331-py3-none-any.whl", hash = "sha256:a363e5ea54a4eb6a4a105d800685fde596bc318089b025b27dee09849fe41ff0"},
@@ -2697,6 +2936,7 @@ version = "0.9.2.20240106"
 description = "Typing stubs for commonmark"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-commonmark-0.9.2.20240106.tar.gz", hash = "sha256:52a062b71766d6ab258fca2d8e19fb0853796e25ca9afa9d0f67a1e42c93479f"},
     {file = "types_commonmark-0.9.2.20240106-py3-none-any.whl", hash = "sha256:606d9de1e3a96cab0b1c0b6cccf4df099116148d1d864d115fde2e27ad6877c3"},
@@ -2708,6 +2948,7 @@ version = "1.1.11.20240228"
 description = "Typing stubs for html5lib"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-html5lib-1.1.11.20240228.tar.gz", hash = "sha256:22736b7299e605ec4ba539d48691e905fd0c61c3ea610acc59922232dc84cede"},
     {file = "types_html5lib-1.1.11.20240228-py3-none-any.whl", hash = "sha256:af5de0125cb0fe5667543b158db83849b22e25c0e36c9149836b095548bf1020"},
@@ -2719,6 +2960,7 @@ version = "4.23.0.20240813"
 description = "Typing stubs for jsonschema"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-jsonschema-4.23.0.20240813.tar.gz", hash = "sha256:c93f48206f209a5bc4608d295ac39f172fb98b9e24159ce577dbd25ddb79a1c0"},
     {file = "types_jsonschema-4.23.0.20240813-py3-none-any.whl", hash = "sha256:be283e23f0b87547316c2ee6b0fd36d95ea30e921db06478029e10b5b6aa6ac3"},
@@ -2733,6 +2975,7 @@ version = "1.3.0.20240530"
 description = "Typing stubs for netaddr"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-netaddr-1.3.0.20240530.tar.gz", hash = "sha256:742c2ec1f202b666f544223e2616b34f1f13df80c91e5aeaaa93a72e4d0774ea"},
     {file = "types_netaddr-1.3.0.20240530-py3-none-any.whl", hash = "sha256:354998d018e326da4f1d9b005fc91137b7c2c473aaf03c4ef64bf83c6861b440"},
@@ -2744,6 +2987,7 @@ version = "2.4.10.6"
 description = "Typing stubs for opentracing"
 optional = false
 python-versions = "*"
+groups = ["dev"]
 files = [
     {file = "types-opentracing-2.4.10.6.tar.gz", hash = "sha256:87a1bdfce9de5e555e30497663583b9b9c3bb494d029ef9806aa1f137c19e744"},
     {file = "types_opentracing-2.4.10.6-py3-none-any.whl", hash = "sha256:25914c834db033a4a38fc322df0b5e5e14503b0ac97f78304ae180d721555e97"},
@@ -2755,6 +2999,7 @@ version = "10.2.0.20240822"
 description = "Typing stubs for Pillow"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-Pillow-10.2.0.20240822.tar.gz", hash = "sha256:559fb52a2ef991c326e4a0d20accb3bb63a7ba8d40eb493e0ecb0310ba52f0d3"},
     {file = "types_Pillow-10.2.0.20240822-py3-none-any.whl", hash = "sha256:d9dab025aba07aeb12fd50a6799d4eac52a9603488eca09d7662543983f16c5d"},
@@ -2762,13 +3007,14 @@ files = [
 
 [[package]]
 name = "types-psycopg2"
-version = "2.9.21.20241019"
+version = "2.9.21.20250121"
 description = "Typing stubs for psycopg2"
 optional = false
-python-versions = ">=3.8"
+python-versions = ">=3.9"
+groups = ["dev"]
 files = [
-    {file = "types-psycopg2-2.9.21.20241019.tar.gz", hash = "sha256:bca89b988d2ebd19bcd08b177d22a877ea8b841decb10ed130afcf39404612fa"},
-    {file = "types_psycopg2-2.9.21.20241019-py3-none-any.whl", hash = "sha256:44d091e67732d16a941baae48cd7b53bf91911bc36888652447cf1ef0c1fb3f6"},
+    {file = "types_psycopg2-2.9.21.20250121-py3-none-any.whl", hash = "sha256:b890dc6f5a08b6433f0ff73a4ec9a834deedad3e914f2a4a6fd43df021f745f1"},
+    {file = "types_psycopg2-2.9.21.20250121.tar.gz", hash = "sha256:2b0e2cd0f3747af1ae25a7027898716d80209604770ef3cbf350fe055b9c349b"},
 ]
 
 [[package]]
@@ -2777,6 +3023,7 @@ version = "24.1.0.20240722"
 description = "Typing stubs for pyOpenSSL"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-pyOpenSSL-24.1.0.20240722.tar.gz", hash = "sha256:47913b4678a01d879f503a12044468221ed8576263c1540dcb0484ca21b08c39"},
     {file = "types_pyOpenSSL-24.1.0.20240722-py3-none-any.whl", hash = "sha256:6a7a5d2ec042537934cfb4c9d4deb0e16c4c6250b09358df1f083682fe6fda54"},
@@ -2788,13 +3035,14 @@ types-cffi = "*"
 
 [[package]]
 name = "types-pyyaml"
-version = "6.0.12.20240917"
+version = "6.0.12.20241230"
 description = "Typing stubs for PyYAML"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
-    {file = "types-PyYAML-6.0.12.20240917.tar.gz", hash = "sha256:d1405a86f9576682234ef83bcb4e6fff7c9305c8b1fbad5e0bcd4f7dbdc9c587"},
-    {file = "types_PyYAML-6.0.12.20240917-py3-none-any.whl", hash = "sha256:392b267f1c0fe6022952462bf5d6523f31e37f6cea49b14cee7ad634b6301570"},
+    {file = "types_PyYAML-6.0.12.20241230-py3-none-any.whl", hash = "sha256:fa4d32565219b68e6dee5f67534c722e53c00d1cfc09c435ef04d7353e1e96e6"},
+    {file = "types_pyyaml-6.0.12.20241230.tar.gz", hash = "sha256:7f07622dbd34bb9c8b264fe860a17e0efcad00d50b5f27e93984909d9363498c"},
 ]
 
 [[package]]
@@ -2803,6 +3051,7 @@ version = "2.32.0.20241016"
 description = "Typing stubs for requests"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-requests-2.32.0.20241016.tar.gz", hash = "sha256:0d9cad2f27515d0e3e3da7134a1b6f28fb97129d86b867f24d9c726452634d95"},
     {file = "types_requests-2.32.0.20241016-py3-none-any.whl", hash = "sha256:4195d62d6d3e043a4eaaf08ff8a62184584d2e8684e9d2aa178c7915a7da3747"},
@@ -2817,6 +3066,7 @@ version = "75.2.0.20241019"
 description = "Typing stubs for setuptools"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
 files = [
     {file = "types-setuptools-75.2.0.20241019.tar.gz", hash = "sha256:86ea31b5f6df2c6b8f2dc8ae3f72b213607f62549b6fa2ed5866e5299f968694"},
     {file = "types_setuptools-75.2.0.20241019-py3-none-any.whl", hash = "sha256:2e48ff3acd4919471e80d5e3f049cce5c177e108d5d36d2d4cee3fa4d4104258"},
@@ -2828,6 +3078,7 @@ version = "4.12.2"
 description = "Backported and Experimental Type Hints for Python 3.8+"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d"},
     {file = "typing_extensions-4.12.2.tar.gz", hash = "sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8"},
@@ -2839,6 +3090,7 @@ version = "2.1.0"
 description = "Encode and decode Base64 without \"=\" padding"
 optional = false
 python-versions = ">=3.6,<4.0"
+groups = ["main"]
 files = [
     {file = "unpaddedbase64-2.1.0-py3-none-any.whl", hash = "sha256:485eff129c30175d2cd6f0cd8d2310dff51e666f7f36175f738d75dfdbd0b1c6"},
     {file = "unpaddedbase64-2.1.0.tar.gz", hash = "sha256:7273c60c089de39d90f5d6d4a7883a79e319dc9d9b1c8924a7fab96178a5f005"},
@@ -2850,13 +3102,14 @@ version = "2.2.2"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "urllib3-2.2.2-py3-none-any.whl", hash = "sha256:a448b2f64d686155468037e1ace9f2d2199776e17f0a46610480d311f73e3472"},
     {file = "urllib3-2.2.2.tar.gz", hash = "sha256:dd505485549a7a552833da5e6063639d0d177c04f23bc3864e41e5dc5f612168"},
 ]
 
 [package.extras]
-brotli = ["brotli (>=1.0.9)", "brotlicffi (>=0.8.0)"]
+brotli = ["brotli (>=1.0.9) ; platform_python_implementation == \"CPython\"", "brotlicffi (>=0.8.0) ; platform_python_implementation != \"CPython\""]
 h2 = ["h2 (>=4,<5)"]
 socks = ["pysocks (>=1.5.6,!=1.5.7,<2.0)"]
 zstd = ["zstandard (>=0.18.0)"]
@@ -2867,6 +3120,7 @@ version = "0.5.1"
 description = "Character encoding aliases for legacy web content"
 optional = false
 python-versions = "*"
+groups = ["main", "dev"]
 files = [
     {file = "webencodings-0.5.1-py2.py3-none-any.whl", hash = "sha256:a0af1213f3c2226497a97e2b3aa01a7e4bee4f403f95be16fc9acd2947514a78"},
     {file = "webencodings-0.5.1.tar.gz", hash = "sha256:b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923"},
@@ -2878,6 +3132,7 @@ version = "1.15.0"
 description = "Module for decorators, wrappers and monkey patching."
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+groups = ["dev"]
 files = [
     {file = "wrapt-1.15.0-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:ca1cccf838cd28d5a0883b342474c630ac48cac5df0ee6eacc9c7290f76b11c1"},
     {file = "wrapt-1.15.0-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:e826aadda3cae59295b95343db8f3d965fb31059da7de01ee8d1c40a60398b29"},
@@ -2962,6 +3217,8 @@ version = "2.4.0"
 description = "An XML Schema validator and decoder"
 optional = true
 python-versions = ">=3.7"
+groups = ["main"]
+markers = "extra == \"saml2\" or extra == \"all\""
 files = [
     {file = "xmlschema-2.4.0-py3-none-any.whl", hash = "sha256:dc87be0caaa61f42649899189aab2fd8e0d567f2cf548433ba7b79278d231a4a"},
     {file = "xmlschema-2.4.0.tar.gz", hash = "sha256:d74cd0c10866ac609e1ef94a5a69b018ad16e39077bc6393408b40c6babee793"},
@@ -2981,6 +3238,8 @@ version = "3.19.1"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 optional = false
 python-versions = ">=3.8"
+groups = ["dev"]
+markers = "platform_machine != \"ppc64le\" and platform_machine != \"s390x\" and python_version < \"3.12\" or python_version < \"3.10\""
 files = [
     {file = "zipp-3.19.1-py3-none-any.whl", hash = "sha256:2828e64edb5386ea6a52e7ba7cdb17bb30a73a858f5eb6eb93d8d36f5ea26091"},
     {file = "zipp-3.19.1.tar.gz", hash = "sha256:35427f6d5594f4acf82d25541438348c26736fa9b3afa2754bcd63cdb99d8e8f"},
@@ -2996,6 +3255,7 @@ version = "4.6"
 description = "Very basic event publishing system"
 optional = false
 python-versions = "*"
+groups = ["dev"]
 files = [
     {file = "zope.event-4.6-py2.py3-none-any.whl", hash = "sha256:73d9e3ef750cca14816a9c322c7250b0d7c9dbc337df5d1b807ff8d3d0b9e97c"},
     {file = "zope.event-4.6.tar.gz", hash = "sha256:81d98813046fc86cc4136e3698fee628a3282f9c320db18658c21749235fce80"},
@@ -3014,6 +3274,7 @@ version = "7.1.0"
 description = "Interfaces for Python"
 optional = false
 python-versions = ">=3.8"
+groups = ["main", "dev"]
 files = [
     {file = "zope.interface-7.1.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:2bd9e9f366a5df08ebbdc159f8224904c1c5ce63893984abb76954e6fbe4381a"},
     {file = "zope.interface-7.1.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:661d5df403cd3c5b8699ac480fa7f58047a3253b029db690efa0c3cf209993ef"},
@@ -3068,6 +3329,7 @@ version = "7.0.1"
 description = "zope.interface extension for defining data schemas"
 optional = false
 python-versions = ">=3.7"
+groups = ["dev"]
 files = [
     {file = "zope.schema-7.0.1-py3-none-any.whl", hash = "sha256:cf006c678793b00e0075ad54d55281c8785ea21e5bc1f5ec0584787719c2aab2"},
     {file = "zope.schema-7.0.1.tar.gz", hash = "sha256:ead4dbcb03354d4e410c9a3b904451eb44d90254751b1cbdedf4a61aede9fbb9"},
@@ -3099,6 +3361,6 @@ url-preview = ["lxml"]
 user-search = ["pyicu"]
 
 [metadata]
-lock-version = "2.0"
+lock-version = "2.1"
 python-versions = "^3.9.0"
 content-hash = "d71159b19349fdc0b7cd8e06e8c8778b603fc37b941c6df34ddc31746783d94d"
diff --git a/pyproject.toml b/pyproject.toml
index a403952d89..bc0f526390 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -97,7 +97,7 @@ module-name = "synapse.synapse_rust"
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.120.2"
+version = "1.127.0rc1"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "AGPL-3.0-or-later"
@@ -370,7 +370,7 @@ tomli = ">=1.2.3"
 # runtime errors caused by build system changes.
 # We are happy to raise these upper bounds upon request,
 # provided we check that it's safe to do so (i.e. that CI passes).
-requires = ["poetry-core>=1.1.0,<=1.9.1", "setuptools_rust>=1.3,<=1.8.1"]
+requires = ["poetry-core>=1.1.0,<=1.9.1", "setuptools_rust>=1.3,<=1.10.2"]
 build-backend = "poetry.core.masonry.api"
 
 
@@ -386,8 +386,11 @@ build-backend = "poetry.core.masonry.api"
 #    c.f. https://github.com/matrix-org/synapse/pull/14259
 skip = "cp36* cp37* cp38* pp37* pp38* *-musllinux_i686 pp*aarch64 *-musllinux_aarch64"
 
-# We need a rust compiler
-before-all =  "curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain stable -y --profile minimal"
+# We need a rust compiler.
+#
+# We temporarily pin Rust to 1.82.0 to work around
+# https://github.com/element-hq/synapse/issues/17988
+before-all =  "sh .ci/before_build_wheel.sh"
 environment= { PATH = "$PATH:$HOME/.cargo/bin" }
 
 # For some reason if we don't manually clean the build directory we
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 026487275c..651b268f86 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -30,14 +30,14 @@ http = "1.1.0"
 lazy_static = "1.4.0"
 log = "0.4.17"
 mime = "0.3.17"
-pyo3 = { version = "0.21.0", features = [
+pyo3 = { version = "0.23.5", features = [
     "macros",
     "anyhow",
     "abi3",
-    "abi3-py38",
+    "abi3-py39",
 ] }
-pyo3-log = "0.10.0"
-pythonize = "0.21.0"
+pyo3-log = "0.12.0"
+pythonize = "0.23.0"
 regex = "1.6.0"
 sha2 = "0.10.8"
 serde = { version = "1.0.144", features = ["derive"] }
diff --git a/rust/src/acl/mod.rs b/rust/src/acl/mod.rs
index 982720ba90..57b45475fd 100644
--- a/rust/src/acl/mod.rs
+++ b/rust/src/acl/mod.rs
@@ -32,14 +32,14 @@ use crate::push::utils::{glob_to_regex, GlobMatchType};
 
 /// Called when registering modules with python.
 pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
-    let child_module = PyModule::new_bound(py, "acl")?;
+    let child_module = PyModule::new(py, "acl")?;
     child_module.add_class::<ServerAclEvaluator>()?;
 
     m.add_submodule(&child_module)?;
 
     // We need to manually add the module to sys.modules to make `from
     // synapse.synapse_rust import acl` work.
-    py.import_bound("sys")?
+    py.import("sys")?
         .getattr("modules")?
         .set_item("synapse.synapse_rust.acl", child_module)?;
 
diff --git a/rust/src/events/internal_metadata.rs b/rust/src/events/internal_metadata.rs
index ad87825f16..eeb6074c10 100644
--- a/rust/src/events/internal_metadata.rs
+++ b/rust/src/events/internal_metadata.rs
@@ -41,9 +41,11 @@ use pyo3::{
     pybacked::PyBackedStr,
     pyclass, pymethods,
     types::{PyAnyMethods, PyDict, PyDictMethods, PyString},
-    Bound, IntoPy, PyAny, PyObject, PyResult, Python,
+    Bound, IntoPyObject, PyAny, PyObject, PyResult, Python,
 };
 
+use crate::UnwrapInfallible;
+
 /// Definitions of the various fields of the internal metadata.
 #[derive(Clone)]
 enum EventInternalMetadataData {
@@ -60,31 +62,59 @@ enum EventInternalMetadataData {
 
 impl EventInternalMetadataData {
     /// Convert the field to its name and python object.
-    fn to_python_pair<'a>(&self, py: Python<'a>) -> (&'a Bound<'a, PyString>, PyObject) {
+    fn to_python_pair<'a>(&self, py: Python<'a>) -> (&'a Bound<'a, PyString>, Bound<'a, PyAny>) {
         match self {
-            EventInternalMetadataData::OutOfBandMembership(o) => {
-                (pyo3::intern!(py, "out_of_band_membership"), o.into_py(py))
-            }
-            EventInternalMetadataData::SendOnBehalfOf(o) => {
-                (pyo3::intern!(py, "send_on_behalf_of"), o.into_py(py))
-            }
-            EventInternalMetadataData::RecheckRedaction(o) => {
-                (pyo3::intern!(py, "recheck_redaction"), o.into_py(py))
-            }
-            EventInternalMetadataData::SoftFailed(o) => {
-                (pyo3::intern!(py, "soft_failed"), o.into_py(py))
-            }
-            EventInternalMetadataData::ProactivelySend(o) => {
-                (pyo3::intern!(py, "proactively_send"), o.into_py(py))
-            }
-            EventInternalMetadataData::Redacted(o) => {
-                (pyo3::intern!(py, "redacted"), o.into_py(py))
-            }
-            EventInternalMetadataData::TxnId(o) => (pyo3::intern!(py, "txn_id"), o.into_py(py)),
-            EventInternalMetadataData::TokenId(o) => (pyo3::intern!(py, "token_id"), o.into_py(py)),
-            EventInternalMetadataData::DeviceId(o) => {
-                (pyo3::intern!(py, "device_id"), o.into_py(py))
-            }
+            EventInternalMetadataData::OutOfBandMembership(o) => (
+                pyo3::intern!(py, "out_of_band_membership"),
+                o.into_pyobject(py)
+                    .unwrap_infallible()
+                    .to_owned()
+                    .into_any(),
+            ),
+            EventInternalMetadataData::SendOnBehalfOf(o) => (
+                pyo3::intern!(py, "send_on_behalf_of"),
+                o.into_pyobject(py).unwrap_infallible().into_any(),
+            ),
+            EventInternalMetadataData::RecheckRedaction(o) => (
+                pyo3::intern!(py, "recheck_redaction"),
+                o.into_pyobject(py)
+                    .unwrap_infallible()
+                    .to_owned()
+                    .into_any(),
+            ),
+            EventInternalMetadataData::SoftFailed(o) => (
+                pyo3::intern!(py, "soft_failed"),
+                o.into_pyobject(py)
+                    .unwrap_infallible()
+                    .to_owned()
+                    .into_any(),
+            ),
+            EventInternalMetadataData::ProactivelySend(o) => (
+                pyo3::intern!(py, "proactively_send"),
+                o.into_pyobject(py)
+                    .unwrap_infallible()
+                    .to_owned()
+                    .into_any(),
+            ),
+            EventInternalMetadataData::Redacted(o) => (
+                pyo3::intern!(py, "redacted"),
+                o.into_pyobject(py)
+                    .unwrap_infallible()
+                    .to_owned()
+                    .into_any(),
+            ),
+            EventInternalMetadataData::TxnId(o) => (
+                pyo3::intern!(py, "txn_id"),
+                o.into_pyobject(py).unwrap_infallible().into_any(),
+            ),
+            EventInternalMetadataData::TokenId(o) => (
+                pyo3::intern!(py, "token_id"),
+                o.into_pyobject(py).unwrap_infallible().into_any(),
+            ),
+            EventInternalMetadataData::DeviceId(o) => (
+                pyo3::intern!(py, "device_id"),
+                o.into_pyobject(py).unwrap_infallible().into_any(),
+            ),
         }
     }
 
@@ -247,7 +277,7 @@ impl EventInternalMetadata {
     ///
     /// Note that `outlier` and `stream_ordering` are stored in separate columns so are not returned here.
     fn get_dict(&self, py: Python<'_>) -> PyResult<PyObject> {
-        let dict = PyDict::new_bound(py);
+        let dict = PyDict::new(py);
 
         for entry in &self.data {
             let (key, value) = entry.to_python_pair(py);
diff --git a/rust/src/events/mod.rs b/rust/src/events/mod.rs
index 0bb6cdb181..209efb917b 100644
--- a/rust/src/events/mod.rs
+++ b/rust/src/events/mod.rs
@@ -30,7 +30,7 @@ mod internal_metadata;
 
 /// Called when registering modules with python.
 pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
-    let child_module = PyModule::new_bound(py, "events")?;
+    let child_module = PyModule::new(py, "events")?;
     child_module.add_class::<internal_metadata::EventInternalMetadata>()?;
     child_module.add_function(wrap_pyfunction!(filter::event_visible_to_server_py, m)?)?;
 
@@ -38,7 +38,7 @@ pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()>
 
     // We need to manually add the module to sys.modules to make `from
     // synapse.synapse_rust import events` work.
-    py.import_bound("sys")?
+    py.import("sys")?
         .getattr("modules")?
         .set_item("synapse.synapse_rust.events", child_module)?;
 
diff --git a/rust/src/http.rs b/rust/src/http.rs
index af052ab721..63ed05be54 100644
--- a/rust/src/http.rs
+++ b/rust/src/http.rs
@@ -70,7 +70,7 @@ pub fn http_request_from_twisted(request: &Bound<'_, PyAny>) -> PyResult<Request
     let headers_iter = request
         .getattr("requestHeaders")?
         .call_method0("getAllRawHeaders")?
-        .iter()?;
+        .try_iter()?;
 
     for header in headers_iter {
         let header = header?;
diff --git a/rust/src/identifier.rs b/rust/src/identifier.rs
index b199c5838e..b70f6a30c7 100644
--- a/rust/src/identifier.rs
+++ b/rust/src/identifier.rs
@@ -71,6 +71,34 @@ impl TryFrom<&str> for UserID {
     }
 }
 
+impl TryFrom<String> for UserID {
+    type Error = IdentifierError;
+
+    /// Will try creating a `UserID` from the provided `&str`.
+    /// Can fail if the user_id is incorrectly formatted.
+    fn try_from(s: String) -> Result<Self, Self::Error> {
+        if !s.starts_with('@') {
+            return Err(IdentifierError::IncorrectSigil);
+        }
+
+        if s.find(':').is_none() {
+            return Err(IdentifierError::MissingColon);
+        }
+
+        Ok(UserID(s))
+    }
+}
+
+impl<'de> serde::Deserialize<'de> for UserID {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let s: String = serde::Deserialize::deserialize(deserializer)?;
+        UserID::try_from(s).map_err(serde::de::Error::custom)
+    }
+}
+
 impl Deref for UserID {
     type Target = str;
 
@@ -84,3 +112,141 @@ impl fmt::Display for UserID {
         write!(f, "{}", self.0)
     }
 }
+
+/// A Matrix room_id.
+#[derive(Clone, Debug, PartialEq)]
+pub struct RoomID(String);
+
+impl RoomID {
+    /// Returns the `localpart` of the room_id.
+    pub fn localpart(&self) -> &str {
+        &self[1..self.colon_pos()]
+    }
+
+    /// Returns the `server_name` / `domain` of the room_id.
+    pub fn server_name(&self) -> &str {
+        &self[self.colon_pos() + 1..]
+    }
+
+    /// Returns the position of the ':' inside of the room_id.
+    /// Used when splitting the room_id into it's respective parts.
+    fn colon_pos(&self) -> usize {
+        self.find(':').unwrap()
+    }
+}
+
+impl TryFrom<&str> for RoomID {
+    type Error = IdentifierError;
+
+    /// Will try creating a `RoomID` from the provided `&str`.
+    /// Can fail if the room_id is incorrectly formatted.
+    fn try_from(s: &str) -> Result<Self, Self::Error> {
+        if !s.starts_with('!') {
+            return Err(IdentifierError::IncorrectSigil);
+        }
+
+        if s.find(':').is_none() {
+            return Err(IdentifierError::MissingColon);
+        }
+
+        Ok(RoomID(s.to_string()))
+    }
+}
+
+impl TryFrom<String> for RoomID {
+    type Error = IdentifierError;
+
+    /// Will try creating a `RoomID` from the provided `String`.
+    /// Can fail if the room_id is incorrectly formatted.
+    fn try_from(s: String) -> Result<Self, Self::Error> {
+        if !s.starts_with('!') {
+            return Err(IdentifierError::IncorrectSigil);
+        }
+
+        if s.find(':').is_none() {
+            return Err(IdentifierError::MissingColon);
+        }
+
+        Ok(RoomID(s))
+    }
+}
+
+impl<'de> serde::Deserialize<'de> for RoomID {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let s: String = serde::Deserialize::deserialize(deserializer)?;
+        RoomID::try_from(s).map_err(serde::de::Error::custom)
+    }
+}
+
+impl Deref for RoomID {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl fmt::Display for RoomID {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+/// A Matrix event_id.
+#[derive(Clone, Debug, PartialEq)]
+pub struct EventID(String);
+
+impl TryFrom<&str> for EventID {
+    type Error = IdentifierError;
+
+    /// Will try creating a `EventID` from the provided `&str`.
+    /// Can fail if the event_id is incorrectly formatted.
+    fn try_from(s: &str) -> Result<Self, Self::Error> {
+        if !s.starts_with('$') {
+            return Err(IdentifierError::IncorrectSigil);
+        }
+
+        Ok(EventID(s.to_string()))
+    }
+}
+
+impl TryFrom<String> for EventID {
+    type Error = IdentifierError;
+
+    /// Will try creating a `EventID` from the provided `String`.
+    /// Can fail if the event_id is incorrectly formatted.
+    fn try_from(s: String) -> Result<Self, Self::Error> {
+        if !s.starts_with('$') {
+            return Err(IdentifierError::IncorrectSigil);
+        }
+
+        Ok(EventID(s))
+    }
+}
+
+impl<'de> serde::Deserialize<'de> for EventID {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        let s: String = serde::Deserialize::deserialize(deserializer)?;
+        EventID::try_from(s).map_err(serde::de::Error::custom)
+    }
+}
+
+impl Deref for EventID {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl fmt::Display for EventID {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index 5de9238326..d751889874 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -1,3 +1,5 @@
+use std::convert::Infallible;
+
 use lazy_static::lazy_static;
 use pyo3::prelude::*;
 use pyo3_log::ResetHandle;
@@ -52,3 +54,16 @@ fn synapse_rust(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
 
     Ok(())
 }
+
+pub trait UnwrapInfallible<T> {
+    fn unwrap_infallible(self) -> T;
+}
+
+impl<T> UnwrapInfallible<T> for Result<T, Infallible> {
+    fn unwrap_infallible(self) -> T {
+        match self {
+            Ok(val) => val,
+            Err(never) => match never {},
+        }
+    }
+}
diff --git a/rust/src/push/evaluator.rs b/rust/src/push/evaluator.rs
index 0d436a1d7b..db406acb88 100644
--- a/rust/src/push/evaluator.rs
+++ b/rust/src/push/evaluator.rs
@@ -167,6 +167,7 @@ impl PushRuleEvaluator {
     ///
     /// Returns the set of actions, if any, that match (filtering out any
     /// `dont_notify` and `coalesce` actions).
+    #[pyo3(signature = (push_rules, user_id=None, display_name=None))]
     pub fn run(
         &self,
         push_rules: &FilteredPushRules,
@@ -236,6 +237,7 @@ impl PushRuleEvaluator {
     }
 
     /// Check if the given condition matches.
+    #[pyo3(signature = (condition, user_id=None, display_name=None))]
     fn matches(
         &self,
         condition: Condition,
diff --git a/rust/src/push/mod.rs b/rust/src/push/mod.rs
index ef8ed150d4..bd0e853ac3 100644
--- a/rust/src/push/mod.rs
+++ b/rust/src/push/mod.rs
@@ -65,8 +65,8 @@ use anyhow::{Context, Error};
 use log::warn;
 use pyo3::exceptions::PyTypeError;
 use pyo3::prelude::*;
-use pyo3::types::{PyBool, PyList, PyLong, PyString};
-use pythonize::{depythonize_bound, pythonize};
+use pyo3::types::{PyBool, PyInt, PyList, PyString};
+use pythonize::{depythonize, pythonize, PythonizeError};
 use serde::de::Error as _;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
@@ -79,7 +79,7 @@ pub mod utils;
 
 /// Called when registering modules with python.
 pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
-    let child_module = PyModule::new_bound(py, "push")?;
+    let child_module = PyModule::new(py, "push")?;
     child_module.add_class::<PushRule>()?;
     child_module.add_class::<PushRules>()?;
     child_module.add_class::<FilteredPushRules>()?;
@@ -90,7 +90,7 @@ pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()>
 
     // We need to manually add the module to sys.modules to make `from
     // synapse.synapse_rust import push` work.
-    py.import_bound("sys")?
+    py.import("sys")?
         .getattr("modules")?
         .set_item("synapse.synapse_rust.push", child_module)?;
 
@@ -182,12 +182,16 @@ pub enum Action {
     Unknown(Value),
 }
 
-impl IntoPy<PyObject> for Action {
-    fn into_py(self, py: Python<'_>) -> PyObject {
+impl<'py> IntoPyObject<'py> for Action {
+    type Target = PyAny;
+    type Output = Bound<'py, Self::Target>;
+    type Error = PythonizeError;
+
+    fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
         // When we pass the `Action` struct to Python we want it to be converted
         // to a dict. We use `pythonize`, which converts the struct using the
         // `serde` serialization.
-        pythonize(py, &self).expect("valid action")
+        pythonize(py, &self)
     }
 }
 
@@ -270,13 +274,13 @@ pub enum SimpleJsonValue {
 }
 
 impl<'source> FromPyObject<'source> for SimpleJsonValue {
-    fn extract(ob: &'source PyAny) -> PyResult<Self> {
+    fn extract_bound(ob: &Bound<'source, PyAny>) -> PyResult<Self> {
         if let Ok(s) = ob.downcast::<PyString>() {
             Ok(SimpleJsonValue::Str(Cow::Owned(s.to_string())))
         // A bool *is* an int, ensure we try bool first.
         } else if let Ok(b) = ob.downcast::<PyBool>() {
             Ok(SimpleJsonValue::Bool(b.extract()?))
-        } else if let Ok(i) = ob.downcast::<PyLong>() {
+        } else if let Ok(i) = ob.downcast::<PyInt>() {
             Ok(SimpleJsonValue::Int(i.extract()?))
         } else if ob.is_none() {
             Ok(SimpleJsonValue::Null)
@@ -298,15 +302,19 @@ pub enum JsonValue {
 }
 
 impl<'source> FromPyObject<'source> for JsonValue {
-    fn extract(ob: &'source PyAny) -> PyResult<Self> {
+    fn extract_bound(ob: &Bound<'source, PyAny>) -> PyResult<Self> {
         if let Ok(l) = ob.downcast::<PyList>() {
-            match l.iter().map(SimpleJsonValue::extract).collect() {
+            match l
+                .iter()
+                .map(|it| SimpleJsonValue::extract_bound(&it))
+                .collect()
+            {
                 Ok(a) => Ok(JsonValue::Array(a)),
                 Err(e) => Err(PyTypeError::new_err(format!(
                     "Can't convert to JsonValue::Array: {e}"
                 ))),
             }
-        } else if let Ok(v) = SimpleJsonValue::extract(ob) {
+        } else if let Ok(v) = SimpleJsonValue::extract_bound(ob) {
             Ok(JsonValue::Value(v))
         } else {
             Err(PyTypeError::new_err(format!(
@@ -363,15 +371,19 @@ pub enum KnownCondition {
     },
 }
 
-impl IntoPy<PyObject> for Condition {
-    fn into_py(self, py: Python<'_>) -> PyObject {
-        pythonize(py, &self).expect("valid condition")
+impl<'source> IntoPyObject<'source> for Condition {
+    type Target = PyAny;
+    type Output = Bound<'source, Self::Target>;
+    type Error = PythonizeError;
+
+    fn into_pyobject(self, py: Python<'source>) -> Result<Self::Output, Self::Error> {
+        pythonize(py, &self)
     }
 }
 
 impl<'source> FromPyObject<'source> for Condition {
     fn extract_bound(ob: &Bound<'source, PyAny>) -> PyResult<Self> {
-        Ok(depythonize_bound(ob.clone())?)
+        Ok(depythonize(ob)?)
     }
 }
 
diff --git a/rust/src/rendezvous/mod.rs b/rust/src/rendezvous/mod.rs
index f69f45490f..3148e0f67a 100644
--- a/rust/src/rendezvous/mod.rs
+++ b/rust/src/rendezvous/mod.rs
@@ -29,7 +29,7 @@ use pyo3::{
     exceptions::PyValueError,
     pyclass, pymethods,
     types::{PyAnyMethods, PyModule, PyModuleMethods},
-    Bound, Py, PyAny, PyObject, PyResult, Python, ToPyObject,
+    Bound, IntoPyObject, Py, PyAny, PyObject, PyResult, Python,
 };
 use ulid::Ulid;
 
@@ -37,6 +37,7 @@ use self::session::Session;
 use crate::{
     errors::{NotFoundError, SynapseError},
     http::{http_request_from_twisted, http_response_to_twisted, HeaderMapPyExt},
+    UnwrapInfallible,
 };
 
 mod session;
@@ -46,7 +47,7 @@ fn prepare_headers(headers: &mut HeaderMap, session: &Session) {
     headers.typed_insert(AccessControlAllowOrigin::ANY);
     headers.typed_insert(AccessControlExposeHeaders::from_iter([ETAG]));
     headers.typed_insert(Pragma::no_cache());
-    headers.typed_insert(CacheControl::new().with_no_store());
+    headers.typed_insert(CacheControl::new().with_no_store().with_no_transform());
     headers.typed_insert(session.etag());
     headers.typed_insert(session.expires());
     headers.typed_insert(session.last_modified());
@@ -125,7 +126,11 @@ impl RendezvousHandler {
         let base = Uri::try_from(format!("{base}_synapse/client/rendezvous"))
             .map_err(|_| PyValueError::new_err("Invalid base URI"))?;
 
-        let clock = homeserver.call_method0("get_clock")?.to_object(py);
+        let clock = homeserver
+            .call_method0("get_clock")?
+            .into_pyobject(py)
+            .unwrap_infallible()
+            .unbind();
 
         // Construct a Python object so that we can get a reference to the
         // evict method and schedule it to run.
@@ -187,10 +192,12 @@ impl RendezvousHandler {
             "url": uri,
         })
         .to_string();
+        let length = response.len() as _;
 
         let mut response = Response::new(response.as_bytes());
         *response.status_mut() = StatusCode::CREATED;
         response.headers_mut().typed_insert(ContentType::json());
+        response.headers_mut().typed_insert(ContentLength(length));
         prepare_headers(response.headers_mut(), &session);
         http_response_to_twisted(twisted_request, response)?;
 
@@ -288,6 +295,14 @@ impl RendezvousHandler {
         let mut response = Response::new(Bytes::new());
         *response.status_mut() = StatusCode::ACCEPTED;
         prepare_headers(response.headers_mut(), session);
+
+        // Even though this isn't mandated by the MSC, we set a Content-Type on the response. It
+        // doesn't do any harm as the body is empty, but this helps escape a bug in some reverse
+        // proxy/cache setup which strips the ETag header if there is no Content-Type set.
+        // Specifically, we noticed this behaviour when placing Synapse behind Cloudflare.
+        response.headers_mut().typed_insert(ContentType::text());
+        response.headers_mut().typed_insert(ContentLength(0));
+
         http_response_to_twisted(twisted_request, response)?;
 
         Ok(())
@@ -304,6 +319,7 @@ impl RendezvousHandler {
         response
             .headers_mut()
             .typed_insert(AccessControlAllowOrigin::ANY);
+        response.headers_mut().typed_insert(ContentLength(0));
         http_response_to_twisted(twisted_request, response)?;
 
         Ok(())
@@ -311,7 +327,7 @@ impl RendezvousHandler {
 }
 
 pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
-    let child_module = PyModule::new_bound(py, "rendezvous")?;
+    let child_module = PyModule::new(py, "rendezvous")?;
 
     child_module.add_class::<RendezvousHandler>()?;
 
@@ -319,7 +335,7 @@ pub fn register_module(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()>
 
     // We need to manually add the module to sys.modules to make `from
     // synapse.synapse_rust import rendezvous` work.
-    py.import_bound("sys")?
+    py.import("sys")?
         .getattr("modules")?
         .set_item("synapse.synapse_rust.rendezvous", child_module)?;
 
diff --git a/scripts-dev/complement.sh b/scripts-dev/complement.sh
index b6dcb96e2c..6be9177f11 100755
--- a/scripts-dev/complement.sh
+++ b/scripts-dev/complement.sh
@@ -195,6 +195,10 @@ if [ -z "$skip_docker_build" ]; then
         # Build the unified Complement image (from the worker Synapse image we just built).
         echo_if_github "::group::Build Docker image: complement/Dockerfile"
         $CONTAINER_RUNTIME build -t complement-synapse \
+            `# This is the tag we end up pushing to the registry (see` \
+            `# .github/workflows/push_complement_image.yml) so let's just label it now` \
+            `# so people can reference it by the same name locally.` \
+            -t ghcr.io/element-hq/synapse/complement-synapse \
             -f "docker/complement/Dockerfile" "docker/complement"
         echo_if_github "::endgroup::"
 
diff --git a/scripts-dev/release.py b/scripts-dev/release.py
index b14b61c705..c556ccaf86 100755
--- a/scripts-dev/release.py
+++ b/scripts-dev/release.py
@@ -592,7 +592,7 @@ def _wait_for_actions(gh_token: Optional[str]) -> None:
         if all(
             workflow["status"] != "in_progress" for workflow in resp["workflow_runs"]
         ):
-            success = (
+            success = all(
                 workflow["status"] == "completed" for workflow in resp["workflow_runs"]
             )
             if success:
diff --git a/synapse/_scripts/synapse_port_db.py b/synapse/_scripts/synapse_port_db.py
index d8f6f8ebdc..438b2ff8a0 100755
--- a/synapse/_scripts/synapse_port_db.py
+++ b/synapse/_scripts/synapse_port_db.py
@@ -42,12 +42,12 @@ from typing import (
     Set,
     Tuple,
     Type,
+    TypedDict,
     TypeVar,
     cast,
 )
 
 import yaml
-from typing_extensions import TypedDict
 
 from twisted.internet import defer, reactor as reactor_
 
@@ -128,6 +128,7 @@ BOOLEAN_COLUMNS = {
     "pushers": ["enabled"],
     "redactions": ["have_censored"],
     "remote_media_cache": ["authenticated"],
+    "room_memberships": ["participant"],
     "room_stats_state": ["is_federatable"],
     "rooms": ["is_public", "has_auth_chain_index"],
     "sliding_sync_joined_rooms": ["is_encrypted"],
@@ -191,6 +192,11 @@ APPEND_ONLY_TABLES = [
 
 
 IGNORED_TABLES = {
+    # Porting the auto generated sequence in this table is non-trivial.
+    # None of the entries in this list are mandatory for Synapse to keep working.
+    # If state group disk space is an issue after the port, the
+    # `mark_unreferenced_state_groups_for_deletion_bg_update` background task can be run again.
+    "state_groups_pending_deletion",
     # We don't port these tables, as they're a faff and we can regenerate
     # them anyway.
     "user_directory",
@@ -216,6 +222,15 @@ IGNORED_TABLES = {
 }
 
 
+# These background updates will not be applied upon creation of the postgres database.
+IGNORED_BACKGROUND_UPDATES = {
+    # Reapplying this background update to the postgres database is unnecessary after
+    # already having waited for the SQLite database to complete all running background
+    # updates.
+    "mark_unreferenced_state_groups_for_deletion_bg_update",
+}
+
+
 # Error returned by the run function. Used at the top-level part of the script to
 # handle errors and return codes.
 end_error: Optional[str] = None
@@ -687,6 +702,20 @@ class Porter:
         # 0 means off. 1 means full. 2 means incremental.
         return autovacuum_setting != 0
 
+    async def remove_ignored_background_updates_from_database(self) -> None:
+        def _remove_delete_unreferenced_state_groups_bg_updates(
+            txn: LoggingTransaction,
+        ) -> None:
+            txn.execute(
+                "DELETE FROM background_updates WHERE update_name = ANY(?)",
+                (list(IGNORED_BACKGROUND_UPDATES),),
+            )
+
+        await self.postgres_store.db_pool.runInteraction(
+            "remove_delete_unreferenced_state_groups_bg_updates",
+            _remove_delete_unreferenced_state_groups_bg_updates,
+        )
+
     async def run(self) -> None:
         """Ports the SQLite database to a PostgreSQL database.
 
@@ -732,6 +761,8 @@ class Porter:
                 self.hs_config.database.get_single_database()
             )
 
+            await self.remove_ignored_background_updates_from_database()
+
             await self.run_background_updates_on_postgres()
 
             self.progress.set_state("Creating port tables")
diff --git a/synapse/api/auth/__init__.py b/synapse/api/auth/__init__.py
index d5241afe73..1b801d3ad3 100644
--- a/synapse/api/auth/__init__.py
+++ b/synapse/api/auth/__init__.py
@@ -18,9 +18,7 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
-from typing import TYPE_CHECKING, Optional, Tuple
-
-from typing_extensions import Protocol
+from typing import TYPE_CHECKING, Optional, Protocol, Tuple
 
 from twisted.web.server import Request
 
diff --git a/synapse/api/auth/msc3861_delegated.py b/synapse/api/auth/msc3861_delegated.py
index 53907c01d4..e6bf271a1f 100644
--- a/synapse/api/auth/msc3861_delegated.py
+++ b/synapse/api/auth/msc3861_delegated.py
@@ -19,7 +19,7 @@
 #
 #
 import logging
-from typing import TYPE_CHECKING, Any, Dict, List, Optional
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional
 from urllib.parse import urlencode
 
 from authlib.oauth2 import ClientAuth
@@ -119,7 +119,7 @@ class MSC3861DelegatedAuth(BaseAuth):
         self._clock = hs.get_clock()
         self._http_client = hs.get_proxied_http_client()
         self._hostname = hs.hostname
-        self._admin_token = self._config.admin_token
+        self._admin_token: Callable[[], Optional[str]] = self._config.admin_token
 
         self._issuer_metadata = RetryOnExceptionCachedCall[OpenIDProviderMetadata](
             self._load_metadata
@@ -133,9 +133,10 @@ class MSC3861DelegatedAuth(BaseAuth):
             )
         else:
             # Else use the client secret
-            assert self._config.client_secret, "No client_secret provided"
+            client_secret = self._config.client_secret()
+            assert client_secret, "No client_secret provided"
             self._client_auth = ClientAuth(
-                self._config.client_id, self._config.client_secret, auth_method
+                self._config.client_id, client_secret, auth_method
             )
 
     async def _load_metadata(self) -> OpenIDProviderMetadata:
@@ -174,6 +175,12 @@ class MSC3861DelegatedAuth(BaseAuth):
             logger.warning("Failed to load metadata:", exc_info=True)
             return None
 
+    async def auth_metadata(self) -> Dict[str, Any]:
+        """
+        Returns the auth metadata dict
+        """
+        return await self._issuer_metadata.get()
+
     async def _introspection_endpoint(self) -> str:
         """
         Returns the introspection endpoint of the issuer
@@ -207,6 +214,9 @@ class MSC3861DelegatedAuth(BaseAuth):
             "Content-Type": "application/x-www-form-urlencoded",
             "User-Agent": str(self._http_client.user_agent, "utf-8"),
             "Accept": "application/json",
+            # Tell MAS that we support reading the device ID as an explicit
+            # value, not encoded in the scope. This is supported by MAS 0.15+
+            "X-MAS-Supports-Device-Id": "1",
         }
 
         args = {"token": token, "token_type_hint": "access_token"}
@@ -277,7 +287,7 @@ class MSC3861DelegatedAuth(BaseAuth):
             requester = await self.get_user_by_access_token(access_token, allow_expired)
 
         # Do not record requests from MAS using the virtual `__oidc_admin` user.
-        if access_token != self._admin_token:
+        if access_token != self._admin_token():
             await self._record_request(request, requester)
 
         if not allow_guest and requester.is_guest:
@@ -318,7 +328,8 @@ class MSC3861DelegatedAuth(BaseAuth):
         token: str,
         allow_expired: bool = False,
     ) -> Requester:
-        if self._admin_token is not None and token == self._admin_token:
+        admin_token = self._admin_token()
+        if admin_token is not None and token == admin_token:
             # XXX: This is a temporary solution so that the admin API can be called by
             # the OIDC provider. This will be removed once we have OIDC client
             # credentials grant support in matrix-authentication-service.
@@ -401,29 +412,41 @@ class MSC3861DelegatedAuth(BaseAuth):
         else:
             user_id = UserID.from_string(user_id_str)
 
-        # Find device_ids in scope
-        # We only allow a single device_id in the scope, so we find them all in the
-        # scope list, and raise if there are more than one. The OIDC server should be
-        # the one enforcing valid scopes, so we raise a 500 if we find an invalid scope.
-        device_ids = [
-            tok[len(SCOPE_MATRIX_DEVICE_PREFIX) :]
-            for tok in scope
-            if tok.startswith(SCOPE_MATRIX_DEVICE_PREFIX)
-        ]
+        # MAS 0.15+ will give us the device ID as an explicit value for compatibility sessions
+        # If present, we get it from here, if not we get it in thee scope
+        device_id = introspection_result.get("device_id")
+        if device_id is not None:
+            # We got the device ID explicitly, just sanity check that it's a string
+            if not isinstance(device_id, str):
+                raise AuthError(
+                    500,
+                    "Invalid device ID in introspection result",
+                )
+        else:
+            # Find device_ids in scope
+            # We only allow a single device_id in the scope, so we find them all in the
+            # scope list, and raise if there are more than one. The OIDC server should be
+            # the one enforcing valid scopes, so we raise a 500 if we find an invalid scope.
+            device_ids = [
+                tok[len(SCOPE_MATRIX_DEVICE_PREFIX) :]
+                for tok in scope
+                if tok.startswith(SCOPE_MATRIX_DEVICE_PREFIX)
+            ]
 
-        if len(device_ids) > 1:
-            raise AuthError(
-                500,
-                "Multiple device IDs in scope",
-            )
+            if len(device_ids) > 1:
+                raise AuthError(
+                    500,
+                    "Multiple device IDs in scope",
+                )
+
+            device_id = device_ids[0] if device_ids else None
 
-        device_id = device_ids[0] if device_ids else None
         if device_id is not None:
             # Sanity check the device_id
             if len(device_id) > 255 or len(device_id) < 1:
                 raise AuthError(
                     500,
-                    "Invalid device ID in scope",
+                    "Invalid device ID in introspection result",
                 )
 
             # Create the device on the fly if it does not exist
diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 8db302b3d8..9806e2b0fe 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -231,6 +231,8 @@ class EventContentFields:
     ROOM_NAME: Final = "name"
 
     MEMBERSHIP: Final = "membership"
+    MEMBERSHIP_DISPLAYNAME: Final = "displayname"
+    MEMBERSHIP_AVATAR_URL: Final = "avatar_url"
 
     # Used in m.room.guest_access events.
     GUEST_ACCESS: Final = "guest_access"
@@ -318,3 +320,8 @@ class ApprovalNoticeMedium:
 class Direction(enum.Enum):
     BACKWARDS = "b"
     FORWARDS = "f"
+
+
+class ProfileFields:
+    DISPLAYNAME: Final = "displayname"
+    AVATAR_URL: Final = "avatar_url"
diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index e6efa7a424..5dd6e84289 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -87,8 +87,7 @@ class Codes(str, Enum):
     WEAK_PASSWORD = "M_WEAK_PASSWORD"
     INVALID_SIGNATURE = "M_INVALID_SIGNATURE"
     USER_DEACTIVATED = "M_USER_DEACTIVATED"
-    # USER_LOCKED = "M_USER_LOCKED"
-    USER_LOCKED = "ORG_MATRIX_MSC3939_USER_LOCKED"
+    USER_LOCKED = "M_USER_LOCKED"
     NOT_YET_UPLOADED = "M_NOT_YET_UPLOADED"
     CANNOT_OVERWRITE_MEDIA = "M_CANNOT_OVERWRITE_MEDIA"
 
@@ -101,8 +100,9 @@ class Codes(str, Enum):
     # The account has been suspended on the server.
     # By opposition to `USER_DEACTIVATED`, this is a reversible measure
     # that can possibly be appealed and reverted.
-    # Part of MSC3823.
-    USER_ACCOUNT_SUSPENDED = "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
+    # Introduced by MSC3823
+    # https://github.com/matrix-org/matrix-spec-proposals/pull/3823
+    USER_ACCOUNT_SUSPENDED = "M_USER_SUSPENDED"
 
     BAD_ALIAS = "M_BAD_ALIAS"
     # For restricted join rules.
@@ -132,6 +132,10 @@ class Codes(str, Enum):
     # connection.
     UNKNOWN_POS = "M_UNKNOWN_POS"
 
+    # Part of MSC4133
+    PROFILE_TOO_LARGE = "M_PROFILE_TOO_LARGE"
+    KEY_TOO_LARGE = "M_KEY_TOO_LARGE"
+
 
 class CodeMessageException(RuntimeError):
     """An exception with integer code, a message string attributes and optional headers.
diff --git a/synapse/api/ratelimiting.py b/synapse/api/ratelimiting.py
index b80630c5d3..229329a5ae 100644
--- a/synapse/api/ratelimiting.py
+++ b/synapse/api/ratelimiting.py
@@ -275,6 +275,7 @@ class Ratelimiter:
         update: bool = True,
         n_actions: int = 1,
         _time_now_s: Optional[float] = None,
+        pause: Optional[float] = 0.5,
     ) -> None:
         """Checks if an action can be performed. If not, raises a LimitExceededError
 
@@ -298,6 +299,8 @@ class Ratelimiter:
                 at all.
             _time_now_s: The current time. Optional, defaults to the current time according
                 to self.clock. Only used by tests.
+            pause: Time in seconds to pause when an action is being limited. Defaults to 0.5
+                to stop clients from "tight-looping" on retrying their request.
 
         Raises:
             LimitExceededError: If an action could not be performed, along with the time in
@@ -316,9 +319,8 @@ class Ratelimiter:
         )
 
         if not allowed:
-            # We pause for a bit here to stop clients from "tight-looping" on
-            # retrying their request.
-            await self.clock.sleep(0.5)
+            if pause:
+                await self.clock.sleep(pause)
 
             raise LimitExceededError(
                 limiter_name=self._limiter_name,
diff --git a/synapse/api/urls.py b/synapse/api/urls.py
index 03a3e96f28..655b5edd7a 100644
--- a/synapse/api/urls.py
+++ b/synapse/api/urls.py
@@ -23,7 +23,8 @@
 
 import hmac
 from hashlib import sha256
-from urllib.parse import urlencode
+from typing import Optional
+from urllib.parse import urlencode, urljoin
 
 from synapse.config import ConfigError
 from synapse.config.homeserver import HomeServerConfig
@@ -66,3 +67,42 @@ class ConsentURIBuilder:
             urlencode({"u": user_id, "h": mac}),
         )
         return consent_uri
+
+
+class LoginSSORedirectURIBuilder:
+    def __init__(self, hs_config: HomeServerConfig):
+        self._public_baseurl = hs_config.server.public_baseurl
+
+    def build_login_sso_redirect_uri(
+        self, *, idp_id: Optional[str], client_redirect_url: str
+    ) -> str:
+        """Build a `/login/sso/redirect` URI for the given identity provider.
+
+        Builds `/_matrix/client/v3/login/sso/redirect/{idpId}?redirectUrl=xxx` when `idp_id` is specified.
+        Otherwise, builds `/_matrix/client/v3/login/sso/redirect?redirectUrl=xxx` when `idp_id` is `None`.
+
+        Args:
+            idp_id: Optional ID of the identity provider
+            client_redirect_url: URL to redirect the user to after login
+
+        Returns
+            The URI to follow when choosing a specific identity provider.
+        """
+        base_url = urljoin(
+            self._public_baseurl,
+            f"{CLIENT_API_PREFIX}/v3/login/sso/redirect",
+        )
+
+        serialized_query_parameters = urlencode({"redirectUrl": client_redirect_url})
+
+        if idp_id:
+            resultant_url = urljoin(
+                # We have to add a trailing slash to the base URL to ensure that the
+                # last path segment is not stripped away when joining with another path.
+                f"{base_url}/",
+                f"{idp_id}?{serialized_query_parameters}",
+            )
+        else:
+            resultant_url = f"{base_url}?{serialized_query_parameters}"
+
+        return resultant_url
diff --git a/synapse/appservice/__init__.py b/synapse/appservice/__init__.py
index a96cdbf1e7..6ee5240c4e 100644
--- a/synapse/appservice/__init__.py
+++ b/synapse/appservice/__init__.py
@@ -87,6 +87,7 @@ class ApplicationService:
         ip_range_whitelist: Optional[IPSet] = None,
         supports_ephemeral: bool = False,
         msc3202_transaction_extensions: bool = False,
+        msc4190_device_management: bool = False,
     ):
         self.token = token
         self.url = (
@@ -100,6 +101,7 @@ class ApplicationService:
         self.ip_range_whitelist = ip_range_whitelist
         self.supports_ephemeral = supports_ephemeral
         self.msc3202_transaction_extensions = msc3202_transaction_extensions
+        self.msc4190_device_management = msc4190_device_management
 
         if "|" in self.id:
             raise Exception("application service ID cannot contain '|' character")
diff --git a/synapse/config/_base.py b/synapse/config/_base.py
index adce34c03a..132ba26af9 100644
--- a/synapse/config/_base.py
+++ b/synapse/config/_base.py
@@ -221,9 +221,13 @@ class Config:
             The number of milliseconds in the duration.
 
         Raises:
-            TypeError, if given something other than an integer or a string
+            TypeError: if given something other than an integer or a string, or the
+                duration is using an incorrect suffix.
             ValueError: if given a string not of the form described above.
         """
+        # For integers, we prefer to use `type(value) is int` instead of
+        # `isinstance(value, int)` because we want to exclude subclasses of int, such as
+        # bool.
         if type(value) is int:  # noqa: E721
             return value
         elif isinstance(value, str):
@@ -246,9 +250,20 @@ class Config:
             if suffix in sizes:
                 value = value[:-1]
                 size = sizes[suffix]
+            elif suffix.isdigit():
+                #  No suffix is treated as milliseconds.
+                value = value
+                size = 1
+            else:
+                raise TypeError(
+                    f"Bad duration suffix {value} (expected no suffix or one of these suffixes: {sizes.keys()})"
+                )
+
             return int(value) * size
         else:
-            raise TypeError(f"Bad duration {value!r}")
+            raise TypeError(
+                f"Bad duration type {value!r} (expected int or string duration)"
+            )
 
     @staticmethod
     def abspath(file_path: str) -> str:
@@ -574,6 +589,14 @@ class RootConfig:
             " Defaults to the directory containing the last config file",
         )
 
+        config_parser.add_argument(
+            "--no-secrets-in-config",
+            dest="secrets_in_config",
+            action="store_false",
+            default=True,
+            help="Reject config options that expect an in-line secret as value.",
+        )
+
         cls.invoke_all_static("add_arguments", config_parser)
 
     @classmethod
@@ -611,7 +634,10 @@ class RootConfig:
 
         config_dict = read_config_files(config_files)
         obj.parse_config_dict(
-            config_dict, config_dir_path=config_dir_path, data_dir_path=data_dir_path
+            config_dict,
+            config_dir_path=config_dir_path,
+            data_dir_path=data_dir_path,
+            allow_secrets_in_config=config_args.secrets_in_config,
         )
 
         obj.invoke_all("read_arguments", config_args)
@@ -638,6 +664,13 @@ class RootConfig:
             help="Specify config file. Can be given multiple times and"
             " may specify directories containing *.yaml files.",
         )
+        parser.add_argument(
+            "--no-secrets-in-config",
+            dest="secrets_in_config",
+            action="store_false",
+            default=True,
+            help="Reject config options that expect an in-line secret as value.",
+        )
 
         # we nest the mutually-exclusive group inside another group so that the help
         # text shows them in their own group.
@@ -806,14 +839,21 @@ class RootConfig:
             return None
 
         obj.parse_config_dict(
-            config_dict, config_dir_path=config_dir_path, data_dir_path=data_dir_path
+            config_dict,
+            config_dir_path=config_dir_path,
+            data_dir_path=data_dir_path,
+            allow_secrets_in_config=config_args.secrets_in_config,
         )
         obj.invoke_all("read_arguments", config_args)
 
         return obj
 
     def parse_config_dict(
-        self, config_dict: Dict[str, Any], config_dir_path: str, data_dir_path: str
+        self,
+        config_dict: Dict[str, Any],
+        config_dir_path: str,
+        data_dir_path: str,
+        allow_secrets_in_config: bool = True,
     ) -> None:
         """Read the information from the config dict into this Config object.
 
@@ -831,6 +871,7 @@ class RootConfig:
             config_dict,
             config_dir_path=config_dir_path,
             data_dir_path=data_dir_path,
+            allow_secrets_in_config=allow_secrets_in_config,
         )
 
     def generate_missing_files(
diff --git a/synapse/config/_base.pyi b/synapse/config/_base.pyi
index d9cb0da38b..55b0e2cbf4 100644
--- a/synapse/config/_base.pyi
+++ b/synapse/config/_base.pyi
@@ -132,7 +132,11 @@ class RootConfig:
     @classmethod
     def invoke_all_static(cls, func_name: str, *args: Any, **kwargs: Any) -> None: ...
     def parse_config_dict(
-        self, config_dict: Dict[str, Any], config_dir_path: str, data_dir_path: str
+        self,
+        config_dict: Dict[str, Any],
+        config_dir_path: str,
+        data_dir_path: str,
+        allow_secrets_in_config: bool = ...,
     ) -> None: ...
     def generate_config(
         self,
diff --git a/synapse/config/appservice.py b/synapse/config/appservice.py
index 6ff00e1ff8..dda6bcd1b7 100644
--- a/synapse/config/appservice.py
+++ b/synapse/config/appservice.py
@@ -183,6 +183,18 @@ def _load_appservice(
             "The `org.matrix.msc3202` option should be true or false if specified."
         )
 
+    # Opt-in flag for the MSC4190 behaviours.
+    # When enabled, the following C-S API endpoints change for appservices:
+    # - POST /register does not return an access token
+    # - PUT /devices/{device_id} creates a new device if one does not exist
+    # - DELETE /devices/{device_id} no longer requires UIA
+    # - POST /delete_devices/{device_id} no longer requires UIA
+    msc4190_enabled = as_info.get("io.element.msc4190", False)
+    if not isinstance(msc4190_enabled, bool):
+        raise ValueError(
+            "The `io.element.msc4190` option should be true or false if specified."
+        )
+
     return ApplicationService(
         token=as_info["as_token"],
         url=as_info["url"],
@@ -195,4 +207,5 @@ def _load_appservice(
         ip_range_whitelist=ip_range_whitelist,
         supports_ephemeral=supports_ephemeral,
         msc3202_transaction_extensions=msc3202_transaction_extensions,
+        msc4190_device_management=msc4190_enabled,
     )
diff --git a/synapse/config/captcha.py b/synapse/config/captcha.py
index 84897c09c5..57d67abbc3 100644
--- a/synapse/config/captcha.py
+++ b/synapse/config/captcha.py
@@ -29,8 +29,15 @@ from ._base import Config, ConfigError
 class CaptchaConfig(Config):
     section = "captcha"
 
-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
         recaptcha_private_key = config.get("recaptcha_private_key")
+        if recaptcha_private_key and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("recaptcha_private_key",),
+            )
         if recaptcha_private_key is not None and not isinstance(
             recaptcha_private_key, str
         ):
@@ -38,6 +45,11 @@ class CaptchaConfig(Config):
         self.recaptcha_private_key = recaptcha_private_key
 
         recaptcha_public_key = config.get("recaptcha_public_key")
+        if recaptcha_public_key and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("recaptcha_public_key",),
+            )
         if recaptcha_public_key is not None and not isinstance(
             recaptcha_public_key, str
         ):
diff --git a/synapse/config/cas.py b/synapse/config/cas.py
index fa59c350c1..c32bf36951 100644
--- a/synapse/config/cas.py
+++ b/synapse/config/cas.py
@@ -20,7 +20,7 @@
 #
 #
 
-from typing import Any, List
+from typing import Any, List, Optional
 
 from synapse.config.sso import SsoAttributeRequirement
 from synapse.types import JsonDict
@@ -46,7 +46,9 @@ class CasConfig(Config):
 
             # TODO Update this to a _synapse URL.
             public_baseurl = self.root.server.public_baseurl
-            self.cas_service_url = public_baseurl + "_matrix/client/r0/login/cas/ticket"
+            self.cas_service_url: Optional[str] = (
+                public_baseurl + "_matrix/client/r0/login/cas/ticket"
+            )
 
             self.cas_protocol_version = cas_config.get("protocol_version")
             if (
diff --git a/synapse/config/emailconfig.py b/synapse/config/emailconfig.py
index 8033fa2e52..c3a3e05a82 100644
--- a/synapse/config/emailconfig.py
+++ b/synapse/config/emailconfig.py
@@ -110,6 +110,7 @@ class EmailConfig(Config):
             raise ConfigError(
                 "email.require_transport_security requires email.enable_tls to be true"
             )
+        self.email_tlsname = email_config.get("tlsname", None)
 
         if "app_name" in email_config:
             self.email_app_name = email_config["app_name"]
diff --git a/synapse/config/experimental.py b/synapse/config/experimental.py
index 3411179a2a..0a963b121a 100644
--- a/synapse/config/experimental.py
+++ b/synapse/config/experimental.py
@@ -20,14 +20,15 @@
 #
 
 import enum
-from typing import TYPE_CHECKING, Any, Optional
+from functools import cache
+from typing import TYPE_CHECKING, Any, Iterable, Optional
 
 import attr
 import attr.validators
 
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions
 from synapse.config import ConfigError
-from synapse.config._base import Config, RootConfig
+from synapse.config._base import Config, RootConfig, read_file
 from synapse.types import JsonDict
 
 # Determine whether authlib is installed.
@@ -43,6 +44,12 @@ if TYPE_CHECKING:
     from authlib.jose.rfc7517 import JsonWebKey
 
 
+@cache
+def read_secret_from_file_once(file_path: Any, config_path: Iterable[str]) -> str:
+    """Returns the memoized secret read from file."""
+    return read_file(file_path, config_path).strip()
+
+
 class ClientAuthMethod(enum.Enum):
     """List of supported client auth methods."""
 
@@ -63,6 +70,40 @@ def _parse_jwks(jwks: Optional[JsonDict]) -> Optional["JsonWebKey"]:
     return JsonWebKey.import_key(jwks)
 
 
+def _check_client_secret(
+    instance: "MSC3861", _attribute: attr.Attribute, _value: Optional[str]
+) -> None:
+    if instance._client_secret and instance._client_secret_path:
+        raise ConfigError(
+            (
+                "You have configured both "
+                "`experimental_features.msc3861.client_secret` and "
+                "`experimental_features.msc3861.client_secret_path`. "
+                "These are mutually incompatible."
+            ),
+            ("experimental", "msc3861", "client_secret"),
+        )
+    # Check client secret can be retrieved
+    instance.client_secret()
+
+
+def _check_admin_token(
+    instance: "MSC3861", _attribute: attr.Attribute, _value: Optional[str]
+) -> None:
+    if instance._admin_token and instance._admin_token_path:
+        raise ConfigError(
+            (
+                "You have configured both "
+                "`experimental_features.msc3861.admin_token` and "
+                "`experimental_features.msc3861.admin_token_path`. "
+                "These are mutually incompatible."
+            ),
+            ("experimental", "msc3861", "admin_token"),
+        )
+    # Check client secret can be retrieved
+    instance.admin_token()
+
+
 @attr.s(slots=True, frozen=True)
 class MSC3861:
     """Configuration for MSC3861: Matrix architecture change to delegate authentication via OIDC"""
@@ -97,15 +138,30 @@ class MSC3861:
     )
     """The auth method used when calling the introspection endpoint."""
 
-    client_secret: Optional[str] = attr.ib(
+    _client_secret: Optional[str] = attr.ib(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(str)),
+        validator=[
+            attr.validators.optional(attr.validators.instance_of(str)),
+            _check_client_secret,
+        ],
     )
     """
     The client secret to use when calling the introspection endpoint,
     when using any of the client_secret_* client auth methods.
     """
 
+    _client_secret_path: Optional[str] = attr.ib(
+        default=None,
+        validator=[
+            attr.validators.optional(attr.validators.instance_of(str)),
+            _check_client_secret,
+        ],
+    )
+    """
+    Alternative to `client_secret`: allows the secret to be specified in an
+    external file.
+    """
+
     jwk: Optional["JsonWebKey"] = attr.ib(default=None, converter=_parse_jwks)
     """
     The JWKS to use when calling the introspection endpoint,
@@ -133,7 +189,7 @@ class MSC3861:
                 ClientAuthMethod.CLIENT_SECRET_BASIC,
                 ClientAuthMethod.CLIENT_SECRET_JWT,
             )
-            and self.client_secret is None
+            and self.client_secret() is None
         ):
             raise ConfigError(
                 f"A client secret must be provided when using the {value} client auth method",
@@ -152,16 +208,51 @@ class MSC3861:
     )
     """The URL of the My Account page on the OIDC Provider as per MSC2965."""
 
-    admin_token: Optional[str] = attr.ib(
+    _admin_token: Optional[str] = attr.ib(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(str)),
+        validator=[
+            attr.validators.optional(attr.validators.instance_of(str)),
+            _check_admin_token,
+        ],
     )
     """
     A token that should be considered as an admin token.
     This is used by the OIDC provider, to make admin calls to Synapse.
     """
 
-    def check_config_conflicts(self, root: RootConfig) -> None:
+    _admin_token_path: Optional[str] = attr.ib(
+        default=None,
+        validator=[
+            attr.validators.optional(attr.validators.instance_of(str)),
+            _check_admin_token,
+        ],
+    )
+    """
+    Alternative to `admin_token`: allows the secret to be specified in an
+    external file.
+    """
+
+    def client_secret(self) -> Optional[str]:
+        """Returns the secret given via `client_secret` or `client_secret_path`."""
+        if self._client_secret_path:
+            return read_secret_from_file_once(
+                self._client_secret_path,
+                ("experimental_features", "msc3861", "client_secret_path"),
+            )
+        return self._client_secret
+
+    def admin_token(self) -> Optional[str]:
+        """Returns the admin token given via `admin_token` or `admin_token_path`."""
+        if self._admin_token_path:
+            return read_secret_from_file_once(
+                self._admin_token_path,
+                ("experimental_features", "msc3861", "admin_token_path"),
+            )
+        return self._admin_token
+
+    def check_config_conflicts(
+        self, root: RootConfig, allow_secrets_in_config: bool
+    ) -> None:
         """Checks for any configuration conflicts with other parts of Synapse.
 
         Raises:
@@ -171,6 +262,24 @@ class MSC3861:
         if not self.enabled:
             return
 
+        if self._client_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("experimental", "msc3861", "client_secret"),
+            )
+
+        if self.jwk and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("experimental", "msc3861", "jwk"),
+            )
+
+        if self._admin_token and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("experimental", "msc3861", "admin_token"),
+            )
+
         if (
             root.auth.password_enabled_for_reauth
             or root.auth.password_enabled_for_login
@@ -261,7 +370,9 @@ class ExperimentalConfig(Config):
 
     section = "experimental"
 
-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
         experimental = config.get("experimental_features") or {}
 
         # MSC3026 (busy presence state)
@@ -405,7 +516,9 @@ class ExperimentalConfig(Config):
             ) from exc
 
         # Check that none of the other config options conflict with MSC3861 when enabled
-        self.msc3861.check_config_conflicts(self.root)
+        self.msc3861.check_config_conflicts(
+            self.root, allow_secrets_in_config=allow_secrets_in_config
+        )
 
         self.msc4028_push_encrypted_events = experimental.get(
             "msc4028_push_encrypted_events", False
@@ -436,15 +549,14 @@ class ExperimentalConfig(Config):
                 ("experimental", "msc4108_delegation_endpoint"),
             )
 
-        self.msc3823_account_suspension = experimental.get(
-            "msc3823_account_suspension", False
-        )
-
-        # MSC4151: Report room API (Client-Server API)
-        self.msc4151_enabled: bool = experimental.get("msc4151_enabled", False)
+        # MSC4133: Custom profile fields
+        self.msc4133_enabled: bool = experimental.get("msc4133_enabled", False)
 
         # MSC4210: Remove legacy mentions
         self.msc4210_enabled: bool = experimental.get("msc4210_enabled", False)
 
         # MSC4222: Adding `state_after` to sync v2
         self.msc4222_enabled: bool = experimental.get("msc4222_enabled", False)
+
+        # MSC4076: Add `disable_badge_count`` to pusher configuration
+        self.msc4076_enabled: bool = experimental.get("msc4076_enabled", False)
diff --git a/synapse/config/key.py b/synapse/config/key.py
index bc96888967..337f98dbc1 100644
--- a/synapse/config/key.py
+++ b/synapse/config/key.py
@@ -43,7 +43,7 @@ from unpaddedbase64 import decode_base64
 from synapse.types import JsonDict
 from synapse.util.stringutils import random_string, random_string_with_symbols
 
-from ._base import Config, ConfigError
+from ._base import Config, ConfigError, read_file
 
 if TYPE_CHECKING:
     from signedjson.key import VerifyKeyWithExpiry
@@ -91,6 +91,16 @@ To suppress this warning and continue using 'matrix.org', admins should set
 'suppress_key_server_warning' to 'true' in homeserver.yaml.
 --------------------------------------------------------------------------------"""
 
+CONFLICTING_MACAROON_SECRET_KEY_OPTS_ERROR = """\
+Conflicting options 'macaroon_secret_key' and 'macaroon_secret_key_path' are
+both defined in config file.
+"""
+
+CONFLICTING_FORM_SECRET_OPTS_ERROR = """\
+Conflicting options 'form_secret' and 'form_secret_path' are both defined in
+config file.
+"""
+
 logger = logging.getLogger(__name__)
 
 
@@ -107,7 +117,11 @@ class KeyConfig(Config):
     section = "key"
 
     def read_config(
-        self, config: JsonDict, config_dir_path: str, **kwargs: Any
+        self,
+        config: JsonDict,
+        config_dir_path: str,
+        allow_secrets_in_config: bool,
+        **kwargs: Any,
     ) -> None:
         # the signing key can be specified inline or in a separate file
         if "signing_key" in config:
@@ -166,10 +180,21 @@ class KeyConfig(Config):
             )
         )
 
-        macaroon_secret_key: Optional[str] = config.get(
-            "macaroon_secret_key", self.root.registration.registration_shared_secret
-        )
-
+        macaroon_secret_key = config.get("macaroon_secret_key")
+        if macaroon_secret_key and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("macaroon_secret_key",),
+            )
+        macaroon_secret_key_path = config.get("macaroon_secret_key_path")
+        if macaroon_secret_key_path:
+            if macaroon_secret_key:
+                raise ConfigError(CONFLICTING_MACAROON_SECRET_KEY_OPTS_ERROR)
+            macaroon_secret_key = read_file(
+                macaroon_secret_key_path, "macaroon_secret_key_path"
+            ).strip()
+        if not macaroon_secret_key:
+            macaroon_secret_key = self.root.registration.registration_shared_secret
         if not macaroon_secret_key:
             # Unfortunately, there are people out there that don't have this
             # set. Lets just be "nice" and derive one from their secret key.
@@ -181,7 +206,19 @@ class KeyConfig(Config):
 
         # a secret which is used to calculate HMACs for form values, to stop
         # falsification of values
-        self.form_secret = config.get("form_secret", None)
+        form_secret = config.get("form_secret", None)
+        if form_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("form_secret",),
+            )
+        form_secret_path = config.get("form_secret_path", None)
+        if form_secret_path:
+            if form_secret:
+                raise ConfigError(CONFLICTING_FORM_SECRET_OPTS_ERROR)
+            self.form_secret = read_file(form_secret_path, "form_secret_path").strip()
+        else:
+            self.form_secret = form_secret
 
     def generate_config_section(
         self,
diff --git a/synapse/config/logger.py b/synapse/config/logger.py
index cfc1a57107..e5aca36b75 100644
--- a/synapse/config/logger.py
+++ b/synapse/config/logger.py
@@ -360,5 +360,6 @@ def setup_logging(
         "Licensed under the AGPL 3.0 license. Website: https://github.com/element-hq/synapse"
     )
     logging.info("Server hostname: %s", config.server.server_name)
+    logging.info("Public Base URL: %s", config.server.public_baseurl)
     logging.info("Instance name: %s", hs.get_instance_name())
     logging.info("Twisted reactor: %s", type(reactor).__name__)
diff --git a/synapse/config/oidc.py b/synapse/config/oidc.py
index d0a03baf55..8ba0ba2c36 100644
--- a/synapse/config/oidc.py
+++ b/synapse/config/oidc.py
@@ -125,6 +125,10 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
             "enum": ["client_secret_basic", "client_secret_post", "none"],
         },
         "pkce_method": {"type": "string", "enum": ["auto", "always", "never"]},
+        "id_token_signing_alg_values_supported": {
+            "type": "array",
+            "items": {"type": "string"},
+        },
         "scopes": {"type": "array", "items": {"type": "string"}},
         "authorization_endpoint": {"type": "string"},
         "token_endpoint": {"type": "string"},
@@ -137,6 +141,9 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
             "type": "string",
             "enum": ["auto", "userinfo_endpoint"],
         },
+        "redirect_uri": {
+            "type": ["string", "null"],
+        },
         "allow_existing_users": {"type": "boolean"},
         "user_mapping_provider": {"type": ["object", "null"]},
         "attribute_requirements": {
@@ -326,6 +333,9 @@ def _parse_oidc_config_dict(
         client_secret_jwt_key=client_secret_jwt_key,
         client_auth_method=client_auth_method,
         pkce_method=oidc_config.get("pkce_method", "auto"),
+        id_token_signing_alg_values_supported=oidc_config.get(
+            "id_token_signing_alg_values_supported"
+        ),
         scopes=oidc_config.get("scopes", ["openid"]),
         authorization_endpoint=oidc_config.get("authorization_endpoint"),
         token_endpoint=oidc_config.get("token_endpoint"),
@@ -337,6 +347,7 @@ def _parse_oidc_config_dict(
         ),
         skip_verification=oidc_config.get("skip_verification", False),
         user_profile_method=oidc_config.get("user_profile_method", "auto"),
+        redirect_uri=oidc_config.get("redirect_uri"),
         allow_existing_users=oidc_config.get("allow_existing_users", False),
         user_mapping_provider_class=user_mapping_provider_class,
         user_mapping_provider_config=user_mapping_provider_config,
@@ -402,6 +413,34 @@ class OidcProviderConfig:
     # Valid values are 'auto', 'always', and 'never'.
     pkce_method: str
 
+    id_token_signing_alg_values_supported: Optional[List[str]]
+    """
+    List of the JWS signing algorithms (`alg` values) that are supported for signing the
+    `id_token`.
+
+    This is *not* required if `discovery` is disabled. We default to supporting `RS256`
+    in the downstream usage if no algorithms are configured here or in the discovery
+    document.
+
+    According to the spec, the algorithm `"RS256"` MUST be included. The absolute rigid
+    approach would be to reject this provider as non-compliant if it's not included but
+    we can just allow whatever and see what happens (they're the ones that configured
+    the value and cooperating with the identity provider). It wouldn't be wise to add it
+    ourselves because absence of `RS256` might indicate that the provider actually
+    doesn't support it, despite the spec requirement. Adding it silently could lead to
+    failed authentication attempts or strange mismatch attacks.
+
+    The `alg` value `"none"` MAY be supported but can only be used if the Authorization
+    Endpoint does not include `id_token` in the `response_type` (ex.
+    `/authorize?response_type=code` where `none` can apply,
+    `/authorize?response_type=code%20id_token` where `none` can't apply) (such as when
+    using the Authorization Code Flow).
+
+    Spec:
+     - https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata
+     - https://openid.net/specs/openid-connect-core-1_0.html#AuthorizationExamples
+    """
+
     # list of scopes to request
     scopes: Collection[str]
 
@@ -432,6 +471,18 @@ class OidcProviderConfig:
     # values are: "auto" or "userinfo_endpoint".
     user_profile_method: str
 
+    redirect_uri: Optional[str]
+    """
+    An optional replacement for Synapse's hardcoded `redirect_uri` URL
+    (`<public_baseurl>/_synapse/client/oidc/callback`). This can be used to send
+    the client to a different URL after it receives a response from the
+    `authorization_endpoint`.
+
+    If this is set, the client is expected to call Synapse's OIDC callback URL
+    reproduced above itself with the necessary parameters and session cookie, in
+    order to complete OIDC login.
+    """
+
     # whether to allow a user logging in via OIDC to match a pre-existing account
     # instead of failing
     allow_existing_users: bool
diff --git a/synapse/config/ratelimiting.py b/synapse/config/ratelimiting.py
index 3fa33f5373..eb1dc2dacb 100644
--- a/synapse/config/ratelimiting.py
+++ b/synapse/config/ratelimiting.py
@@ -228,3 +228,15 @@ class RatelimitConfig(Config):
                 config.get("remote_media_download_burst_count", "500M")
             ),
         )
+
+        self.rc_presence_per_user = RatelimitSettings.parse(
+            config,
+            "rc_presence.per_user",
+            defaults={"per_second": 0.1, "burst_count": 1},
+        )
+
+        self.rc_delayed_event_mgmt = RatelimitSettings.parse(
+            config,
+            "rc_delayed_event_mgmt",
+            defaults={"per_second": 1, "burst_count": 5},
+        )
diff --git a/synapse/config/redis.py b/synapse/config/redis.py
index 3f38fa11b0..948c95eef7 100644
--- a/synapse/config/redis.py
+++ b/synapse/config/redis.py
@@ -34,7 +34,9 @@ These are mutually incompatible.
 class RedisConfig(Config):
     section = "redis"
 
-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
         redis_config = config.get("redis") or {}
         self.redis_enabled = redis_config.get("enabled", False)
 
@@ -48,6 +50,11 @@ class RedisConfig(Config):
         self.redis_path = redis_config.get("path", None)
         self.redis_dbid = redis_config.get("dbid", None)
         self.redis_password = redis_config.get("password")
+        if self.redis_password and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("redis", "password"),
+            )
         redis_password_path = redis_config.get("password_path")
         if redis_password_path:
             if self.redis_password:
diff --git a/synapse/config/registration.py b/synapse/config/registration.py
index c7f3e6d35e..3cf7031656 100644
--- a/synapse/config/registration.py
+++ b/synapse/config/registration.py
@@ -43,7 +43,9 @@ You have configured both `registration_shared_secret` and
 class RegistrationConfig(Config):
     section = "registration"
 
-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
         self.enable_registration = strtobool(
             str(config.get("enable_registration", False))
         )
@@ -68,6 +70,11 @@ class RegistrationConfig(Config):
 
         # read the shared secret, either inline or from an external file
         self.registration_shared_secret = config.get("registration_shared_secret")
+        if self.registration_shared_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("registration_shared_secret",),
+            )
         registration_shared_secret_path = config.get("registration_shared_secret_path")
         if registration_shared_secret_path:
             if self.registration_shared_secret:
diff --git a/synapse/config/repository.py b/synapse/config/repository.py
index 27860154e1..fc5a90c85a 100644
--- a/synapse/config/repository.py
+++ b/synapse/config/repository.py
@@ -22,7 +22,7 @@
 import logging
 import os
 from typing import Any, Dict, List, Tuple
-from urllib.request import getproxies_environment  # type: ignore
+from urllib.request import getproxies_environment
 
 import attr
 
diff --git a/synapse/config/room_directory.py b/synapse/config/room_directory.py
index 704895cf9a..f0349b68f2 100644
--- a/synapse/config/room_directory.py
+++ b/synapse/config/room_directory.py
@@ -54,9 +54,7 @@ class RoomDirectoryConfig(Config):
                 for rule in room_list_publication_rules
             ]
         else:
-            self._room_list_publication_rules = [
-                _RoomDirectoryRule("room_list_publication_rules", {"action": "allow"})
-            ]
+            self._room_list_publication_rules = []
 
     def is_alias_creation_allowed(self, user_id: str, room_id: str, alias: str) -> bool:
         """Checks if the given user is allowed to create the given alias
diff --git a/synapse/config/server.py b/synapse/config/server.py
index ad7331de42..6b29983617 100644
--- a/synapse/config/server.py
+++ b/synapse/config/server.py
@@ -332,8 +332,14 @@ class ServerConfig(Config):
             logger.info("Using default public_baseurl %s", public_baseurl)
         else:
             self.serve_client_wellknown = True
+            # Ensure that public_baseurl ends with a trailing slash
             if public_baseurl[-1] != "/":
                 public_baseurl += "/"
+
+        # Scrutinize user-provided config
+        if not isinstance(public_baseurl, str):
+            raise ConfigError("Must be a string", ("public_baseurl",))
+
         self.public_baseurl = public_baseurl
 
         # check that public_baseurl is valid
diff --git a/synapse/config/sso.py b/synapse/config/sso.py
index d7a2187e7d..97b85e47ea 100644
--- a/synapse/config/sso.py
+++ b/synapse/config/sso.py
@@ -19,7 +19,7 @@
 #
 #
 import logging
-from typing import Any, Dict, Optional
+from typing import Any, Dict, List, Optional
 
 import attr
 
@@ -43,13 +43,23 @@ class SsoAttributeRequirement:
     """Object describing a single requirement for SSO attributes."""
 
     attribute: str
-    # If a value is not given, than the attribute must simply exist.
-    value: Optional[str]
+    # If neither value nor one_of is given, the attribute must simply exist. This is
+    # only true for CAS configs which use a different JSON schema than the one below.
+    value: Optional[str] = None
+    one_of: Optional[List[str]] = None
 
     JSON_SCHEMA = {
         "type": "object",
-        "properties": {"attribute": {"type": "string"}, "value": {"type": "string"}},
-        "required": ["attribute", "value"],
+        "properties": {
+            "attribute": {"type": "string"},
+            "value": {"type": "string"},
+            "one_of": {"type": "array", "items": {"type": "string"}},
+        },
+        "required": ["attribute"],
+        "oneOf": [
+            {"required": ["value"]},
+            {"required": ["one_of"]},
+        ],
     }
 
 
diff --git a/synapse/config/voip.py b/synapse/config/voip.py
index 8614a41dd4..f33602d975 100644
--- a/synapse/config/voip.py
+++ b/synapse/config/voip.py
@@ -34,9 +34,16 @@ These are mutually incompatible.
 class VoipConfig(Config):
     section = "voip"
 
-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
         self.turn_uris = config.get("turn_uris", [])
         self.turn_shared_secret = config.get("turn_shared_secret")
+        if self.turn_shared_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("turn_shared_secret",),
+            )
         turn_shared_secret_path = config.get("turn_shared_secret_path")
         if turn_shared_secret_path:
             if self.turn_shared_secret:
diff --git a/synapse/config/workers.py b/synapse/config/workers.py
index ab896be307..5af50ee952 100644
--- a/synapse/config/workers.py
+++ b/synapse/config/workers.py
@@ -38,6 +38,7 @@ from synapse.config._base import (
     ConfigError,
     RoutableShardedWorkerHandlingConfig,
     ShardedWorkerHandlingConfig,
+    read_file,
 )
 from synapse.config._util import parse_and_validate_mapping
 from synapse.config.server import (
@@ -65,6 +66,11 @@ configuration under `main` inside the `instance_map`. See workers documentation
 `https://element-hq.github.io/synapse/latest/workers.html#worker-configuration`
 """
 
+CONFLICTING_WORKER_REPLICATION_SECRET_OPTS_ERROR = """\
+Conflicting options 'worker_replication_secret' and
+'worker_replication_secret_path' are both defined in config file.
+"""
+
 # This allows for a handy knob when it's time to change from 'master' to
 # something with less 'history'
 MAIN_PROCESS_INSTANCE_NAME = "master"
@@ -218,7 +224,9 @@ class WorkerConfig(Config):
 
     section = "worker"
 
-    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
+    def read_config(
+        self, config: JsonDict, allow_secrets_in_config: bool, **kwargs: Any
+    ) -> None:
         self.worker_app = config.get("worker_app")
 
         # Canonicalise worker_app so that master always has None
@@ -242,7 +250,23 @@ class WorkerConfig(Config):
             raise ConfigError(DIRECT_TCP_ERROR, ("worker_replication_port",))
 
         # The shared secret used for authentication when connecting to the main synapse.
-        self.worker_replication_secret = config.get("worker_replication_secret", None)
+        worker_replication_secret = config.get("worker_replication_secret", None)
+        if worker_replication_secret and not allow_secrets_in_config:
+            raise ConfigError(
+                "Config options that expect an in-line secret as value are disabled",
+                ("worker_replication_secret",),
+            )
+        worker_replication_secret_path = config.get(
+            "worker_replication_secret_path", None
+        )
+        if worker_replication_secret_path:
+            if worker_replication_secret:
+                raise ConfigError(CONFLICTING_WORKER_REPLICATION_SECRET_OPTS_ERROR)
+            self.worker_replication_secret = read_file(
+                worker_replication_secret_path, "worker_replication_secret_path"
+            ).strip()
+        else:
+            self.worker_replication_secret = worker_replication_secret
 
         self.worker_name = config.get("worker_name", self.worker_app)
         self.instance_name = self.worker_name or MAIN_PROCESS_INSTANCE_NAME
diff --git a/synapse/event_auth.py b/synapse/event_auth.py
index c208b900c5..5ecf493f98 100644
--- a/synapse/event_auth.py
+++ b/synapse/event_auth.py
@@ -32,6 +32,7 @@ from typing import (
     Mapping,
     MutableMapping,
     Optional,
+    Protocol,
     Set,
     Tuple,
     Union,
@@ -41,7 +42,6 @@ from typing import (
 from canonicaljson import encode_canonical_json
 from signedjson.key import decode_verify_key_bytes
 from signedjson.sign import SignatureVerifyException, verify_signed_json
-from typing_extensions import Protocol
 from unpaddedbase64 import decode_base64
 
 from synapse.api.constants import (
@@ -566,6 +566,7 @@ def _is_membership_change_allowed(
     logger.debug(
         "_is_membership_change_allowed: %s",
         {
+            "caller_membership": caller.membership if caller else None,
             "caller_in_room": caller_in_room,
             "caller_invited": caller_invited,
             "caller_knocked": caller_knocked,
@@ -677,7 +678,8 @@ def _is_membership_change_allowed(
                 and join_rule == JoinRules.KNOCK_RESTRICTED
             )
         ):
-            if not caller_in_room and not caller_invited:
+            # You can only join the room if you are invited or are already in the room.
+            if not (caller_in_room or caller_invited):
                 raise AuthError(403, "You are not invited to this room.")
         else:
             # TODO (erikj): may_join list
diff --git a/synapse/events/__init__.py b/synapse/events/__init__.py
index 2e56b671f0..a85e66d6bf 100644
--- a/synapse/events/__init__.py
+++ b/synapse/events/__init__.py
@@ -22,7 +22,6 @@
 
 import abc
 import collections.abc
-import os
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -30,6 +29,7 @@ from typing import (
     Generic,
     Iterable,
     List,
+    Literal,
     Optional,
     Tuple,
     Type,
@@ -39,30 +39,29 @@ from typing import (
 )
 
 import attr
-from typing_extensions import Literal
 from unpaddedbase64 import encode_base64
 
-from synapse.api.constants import RelationTypes
+from synapse.api.constants import EventTypes, RelationTypes
 from synapse.api.room_versions import EventFormatVersions, RoomVersion, RoomVersions
 from synapse.synapse_rust.events import EventInternalMetadata
 from synapse.types import JsonDict, StrCollection
 from synapse.util.caches import intern_dict
 from synapse.util.frozenutils import freeze
-from synapse.util.stringutils import strtobool
 
 if TYPE_CHECKING:
     from synapse.events.builder import EventBuilder
 
-# Whether we should use frozen_dict in FrozenEvent. Using frozen_dicts prevents
-# bugs where we accidentally share e.g. signature dicts. However, converting a
-# dict to frozen_dicts is expensive.
-#
-# NOTE: This is overridden by the configuration by the Synapse worker apps, but
-# for the sake of tests, it is set here while it cannot be configured on the
-# homeserver object itself.
 
-USE_FROZEN_DICTS = strtobool(os.environ.get("SYNAPSE_USE_FROZEN_DICTS", "0"))
+USE_FROZEN_DICTS = False
+"""
+Whether we should use frozen_dict in FrozenEvent. Using frozen_dicts prevents
+bugs where we accidentally share e.g. signature dicts. However, converting a
+dict to frozen_dicts is expensive.
 
+NOTE: This is overridden by the configuration by the Synapse worker apps, but
+for the sake of tests, it is set here because it cannot be configured on the
+homeserver object itself.
+"""
 
 T = TypeVar("T")
 
@@ -325,12 +324,17 @@ class EventBase(metaclass=abc.ABCMeta):
     def __repr__(self) -> str:
         rejection = f"REJECTED={self.rejected_reason}, " if self.rejected_reason else ""
 
+        conditional_membership_string = ""
+        if self.get("type") == EventTypes.Member:
+            conditional_membership_string = f"membership={self.membership}, "
+
         return (
             f"<{self.__class__.__name__} "
             f"{rejection}"
             f"event_id={self.event_id}, "
             f"type={self.get('type')}, "
             f"state_key={self.get('state_key')}, "
+            f"{conditional_membership_string}"
             f"outlier={self.internal_metadata.is_outlier()}"
             ">"
         )
diff --git a/synapse/events/auto_accept_invites.py b/synapse/events/auto_accept_invites.py
index d88ec51d9d..4295107c47 100644
--- a/synapse/events/auto_accept_invites.py
+++ b/synapse/events/auto_accept_invites.py
@@ -66,50 +66,67 @@ class InviteAutoAccepter:
             event: The incoming event.
         """
         # Check if the event is an invite for a local user.
-        is_invite_for_local_user = (
-            event.type == EventTypes.Member
-            and event.is_state()
-            and event.membership == Membership.INVITE
-            and self._api.is_mine(event.state_key)
-        )
+        if (
+            event.type != EventTypes.Member
+            or event.is_state() is False
+            or event.membership != Membership.INVITE
+            or self._api.is_mine(event.state_key) is False
+        ):
+            return
 
         # Only accept invites for direct messages if the configuration mandates it.
         is_direct_message = event.content.get("is_direct", False)
-        is_allowed_by_direct_message_rules = (
-            not self._config.accept_invites_only_for_direct_messages
-            or is_direct_message is True
-        )
+        if (
+            self._config.accept_invites_only_for_direct_messages
+            and is_direct_message is False
+        ):
+            return
 
         # Only accept invites from remote users if the configuration mandates it.
         is_from_local_user = self._api.is_mine(event.sender)
-        is_allowed_by_local_user_rules = (
-            not self._config.accept_invites_only_from_local_users
-            or is_from_local_user is True
+        if (
+            self._config.accept_invites_only_from_local_users
+            and is_from_local_user is False
+        ):
+            return
+
+        # Check the user is activated.
+        recipient = await self._api.get_userinfo_by_id(event.state_key)
+
+        # Ignore if the user doesn't exist.
+        if recipient is None:
+            return
+
+        # Never accept invites for deactivated users.
+        if recipient.is_deactivated:
+            return
+
+        # Never accept invites for suspended users.
+        if recipient.suspended:
+            return
+
+        # Never accept invites for locked users.
+        if recipient.locked:
+            return
+
+        # Make the user join the room. We run this as a background process to circumvent a race condition
+        # that occurs when responding to invites over federation (see https://github.com/matrix-org/synapse-auto-accept-invite/issues/12)
+        run_as_background_process(
+            "retry_make_join",
+            self._retry_make_join,
+            event.state_key,
+            event.state_key,
+            event.room_id,
+            "join",
+            bg_start_span=False,
         )
 
-        if (
-            is_invite_for_local_user
-            and is_allowed_by_direct_message_rules
-            and is_allowed_by_local_user_rules
-        ):
-            # Make the user join the room. We run this as a background process to circumvent a race condition
-            # that occurs when responding to invites over federation (see https://github.com/matrix-org/synapse-auto-accept-invite/issues/12)
-            run_as_background_process(
-                "retry_make_join",
-                self._retry_make_join,
-                event.state_key,
-                event.state_key,
-                event.room_id,
-                "join",
-                bg_start_span=False,
+        if is_direct_message:
+            # Mark this room as a direct message!
+            await self._mark_room_as_direct_message(
+                event.state_key, event.sender, event.room_id
             )
 
-            if is_direct_message:
-                # Mark this room as a direct message!
-                await self._mark_room_as_direct_message(
-                    event.state_key, event.sender, event.room_id
-                )
-
     async def _mark_room_as_direct_message(
         self, user_id: str, dm_user_id: str, room_id: str
     ) -> None:
diff --git a/synapse/events/builder.py b/synapse/events/builder.py
index 10ef01131b..76df083d69 100644
--- a/synapse/events/builder.py
+++ b/synapse/events/builder.py
@@ -24,7 +24,7 @@ from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union
 import attr
 from signedjson.types import SigningKey
 
-from synapse.api.constants import MAX_DEPTH
+from synapse.api.constants import MAX_DEPTH, EventTypes
 from synapse.api.room_versions import (
     KNOWN_EVENT_FORMAT_VERSIONS,
     EventFormatVersions,
@@ -109,6 +109,19 @@ class EventBuilder:
     def is_state(self) -> bool:
         return self._state_key is not None
 
+    def is_mine_id(self, user_id: str) -> bool:
+        """Determines whether a user ID or room alias originates from this homeserver.
+
+        Returns:
+            `True` if the hostname part of the user ID or room alias matches this
+            homeserver.
+            `False` otherwise, or if the user ID or room alias is malformed.
+        """
+        localpart_hostname = user_id.split(":", 1)
+        if len(localpart_hostname) < 2:
+            return False
+        return localpart_hostname[1] == self._hostname
+
     async def build(
         self,
         prev_event_ids: List[str],
@@ -142,6 +155,46 @@ class EventBuilder:
                 self, state_ids
             )
 
+            # Check for out-of-band membership that may have been exposed on `/sync` but
+            # the events have not been de-outliered yet so they won't be part of the
+            # room state yet.
+            #
+            # This helps in situations where a remote homeserver invites a local user to
+            # a room that we're already participating in; and we've persisted the invite
+            # as an out-of-band membership (outlier), but it hasn't been pushed to us as
+            # part of a `/send` transaction yet and de-outliered. This also helps for
+            # any of the other out-of-band membership transitions.
+            #
+            # As an optimization, we could check if the room state already includes a
+            # non-`leave` membership event, then we can assume the membership event has
+            # been de-outliered and we don't need to check for an out-of-band
+            # membership. But we don't have the necessary information from a
+            # `StateMap[str]` and we'll just have to take the hit of this extra lookup
+            # for any membership event for now.
+            if self.type == EventTypes.Member and self.is_mine_id(self.state_key):
+                (
+                    _membership,
+                    member_event_id,
+                ) = await self._store.get_local_current_membership_for_user_in_room(
+                    user_id=self.state_key,
+                    room_id=self.room_id,
+                )
+                # There is no need to check if the membership is actually an
+                # out-of-band membership (`outlier`) as we would end up with the
+                # same result either way (adding the member event to the
+                # `auth_event_ids`).
+                if (
+                    member_event_id is not None
+                    # We only need to be careful about duplicating the event in the
+                    # `auth_event_ids` list (duplicate `type`/`state_key` is part of the
+                    # authorization rules)
+                    and member_event_id not in auth_event_ids
+                ):
+                    auth_event_ids.append(member_event_id)
+                    # Also make sure to point to the previous membership event that will
+                    # allow this one to happen so the computed state works out.
+                    prev_event_ids.append(member_event_id)
+
         format_version = self.room_version.event_format
         # The types of auth/prev events changes between event versions.
         prev_events: Union[StrCollection, List[Tuple[str, Dict[str, str]]]]
diff --git a/synapse/events/snapshot.py b/synapse/events/snapshot.py
index dd21a6136b..0bca4c188b 100644
--- a/synapse/events/snapshot.py
+++ b/synapse/events/snapshot.py
@@ -248,7 +248,7 @@ class EventContext(UnpersistedEventContextBase):
     @tag_args
     async def get_current_state_ids(
         self, state_filter: Optional["StateFilter"] = None
-    ) -> Optional[StateMap[str]]:
+    ) -> StateMap[str]:
         """
         Gets the room state map, including this event - ie, the state in ``state_group``
 
@@ -256,13 +256,12 @@ class EventContext(UnpersistedEventContextBase):
         not make it into the room state. This method will raise an exception if
         ``rejected`` is set.
 
+        It is also an error to access this for an outlier event.
+
         Arg:
            state_filter: specifies the type of state event to fetch from DB, example: EventTypes.JoinRules
 
         Returns:
-            Returns None if state_group is None, which happens when the associated
-            event is an outlier.
-
             Maps a (type, state_key) to the event ID of the state event matching
             this tuple.
         """
@@ -300,7 +299,8 @@ class EventContext(UnpersistedEventContextBase):
             this tuple.
         """
 
-        assert self.state_group_before_event is not None
+        if self.state_group_before_event is None:
+            return {}
         return await self._storage.state.get_state_ids_for_group(
             self.state_group_before_event, state_filter
         )
diff --git a/synapse/federation/sender/__init__.py b/synapse/federation/sender/__init__.py
index 1888480881..b95b3c629d 100644
--- a/synapse/federation/sender/__init__.py
+++ b/synapse/federation/sender/__init__.py
@@ -139,14 +139,13 @@ from typing import (
     Hashable,
     Iterable,
     List,
+    Literal,
     Optional,
-    Set,
     Tuple,
 )
 
 import attr
 from prometheus_client import Counter
-from typing_extensions import Literal
 
 from twisted.internet import defer
 
@@ -170,7 +169,13 @@ from synapse.metrics.background_process_metrics import (
     run_as_background_process,
     wrap_as_background_process,
 )
-from synapse.types import JsonDict, ReadReceipt, RoomStreamToken, StrCollection
+from synapse.types import (
+    JsonDict,
+    ReadReceipt,
+    RoomStreamToken,
+    StrCollection,
+    get_domain_from_id,
+)
 from synapse.util import Clock
 from synapse.util.metrics import Measure
 from synapse.util.retryutils import filter_destinations_by_retry_limiter
@@ -297,12 +302,10 @@ class _DestinationWakeupQueue:
     # being woken up.
     _MAX_TIME_IN_QUEUE = 30.0
 
-    # The maximum duration in seconds between waking up consecutive destination
-    # queues.
-    _MAX_DELAY = 0.1
-
     sender: "FederationSender" = attr.ib()
     clock: Clock = attr.ib()
+    max_delay_s: int = attr.ib()
+
     queue: "OrderedDict[str, Literal[None]]" = attr.ib(factory=OrderedDict)
     processing: bool = attr.ib(default=False)
 
@@ -332,7 +335,7 @@ class _DestinationWakeupQueue:
             # We also add an upper bound to the delay, to gracefully handle the
             # case where the queue only has a few entries in it.
             current_sleep_seconds = min(
-                self._MAX_DELAY, self._MAX_TIME_IN_QUEUE / len(self.queue)
+                self.max_delay_s, self._MAX_TIME_IN_QUEUE / len(self.queue)
             )
 
             while self.queue:
@@ -416,19 +419,14 @@ class FederationSender(AbstractFederationSender):
         self._is_processing = False
         self._last_poked_id = -1
 
-        # map from room_id to a set of PerDestinationQueues which we believe are
-        # awaiting a call to flush_read_receipts_for_room. The presence of an entry
-        # here for a given room means that we are rate-limiting RR flushes to that room,
-        # and that there is a pending call to _flush_rrs_for_room in the system.
-        self._queues_awaiting_rr_flush_by_room: Dict[str, Set[PerDestinationQueue]] = {}
-
-        self._rr_txn_interval_per_room_ms = (
-            1000.0
-            / hs.config.ratelimiting.federation_rr_transactions_per_room_per_second
-        )
-
         self._external_cache = hs.get_external_cache()
-        self._destination_wakeup_queue = _DestinationWakeupQueue(self, self.clock)
+
+        rr_txn_interval_per_room_s = (
+            1.0 / hs.config.ratelimiting.federation_rr_transactions_per_room_per_second
+        )
+        self._destination_wakeup_queue = _DestinationWakeupQueue(
+            self, self.clock, max_delay_s=rr_txn_interval_per_room_s
+        )
 
         # Regularly wake up destinations that have outstanding PDUs to be caught up
         self.clock.looping_call_now(
@@ -745,37 +743,48 @@ class FederationSender(AbstractFederationSender):
 
         # Some background on the rate-limiting going on here.
         #
-        # It turns out that if we attempt to send out RRs as soon as we get them from
-        # a client, then we end up trying to do several hundred Hz of federation
-        # transactions. (The number of transactions scales as O(N^2) on the size of a
-        # room, since in a large room we have both more RRs coming in, and more servers
-        # to send them to.)
+        # It turns out that if we attempt to send out RRs as soon as we get them
+        # from a client, then we end up trying to do several hundred Hz of
+        # federation transactions. (The number of transactions scales as O(N^2)
+        # on the size of a room, since in a large room we have both more RRs
+        # coming in, and more servers to send them to.)
         #
-        # This leads to a lot of CPU load, and we end up getting behind. The solution
-        # currently adopted is as follows:
+        # This leads to a lot of CPU load, and we end up getting behind. The
+        # solution currently adopted is to differentiate between receipts and
+        # destinations we should immediately send to, and those we can trickle
+        # the receipts to.
         #
-        # The first receipt in a given room is sent out immediately, at time T0. Any
-        # further receipts are, in theory, batched up for N seconds, where N is calculated
-        # based on the number of servers in the room to achieve a transaction frequency
-        # of around 50Hz. So, for example, if there were 100 servers in the room, then
-        # N would be 100 / 50Hz = 2 seconds.
+        # The current logic is to send receipts out immediately if:
+        #   - the room is "small", i.e. there's only N servers to send receipts
+        #     to, and so sending out the receipts immediately doesn't cause too
+        #     much load; or
+        #   - the receipt is for an event that happened recently, as users
+        #     notice if receipts are delayed when they know other users are
+        #     currently reading the room; or
+        #   - the receipt is being sent to the server that sent the event, so
+        #     that users see receipts for their own receipts quickly.
         #
-        # Then, after T+N, we flush out any receipts that have accumulated, and restart
-        # the timer to flush out more receipts at T+2N, etc. If no receipts accumulate,
-        # we stop the cycle and go back to the start.
+        # For destinations that we should delay sending the receipt to, we queue
+        # the receipts up to be sent in the next transaction, but don't trigger
+        # a new transaction to be sent. We then add the destination to the
+        # `DestinationWakeupQueue`, which will slowly iterate over each
+        # destination and trigger a new transaction to be sent.
         #
-        # However, in practice, it is often possible to flush out receipts earlier: in
-        # particular, if we are sending a transaction to a given server anyway (for
-        # example, because we have a PDU or a RR in another room to send), then we may
-        # as well send out all of the pending RRs for that server. So it may be that
-        # by the time we get to T+N, we don't actually have any RRs left to send out.
-        # Nevertheless we continue to buffer up RRs for the room in question until we
-        # reach the point that no RRs arrive between timer ticks.
+        # However, in practice, it is often possible to send out delayed
+        # receipts earlier: in particular, if we are sending a transaction to a
+        # given server anyway (for example, because we have a PDU or a RR in
+        # another room to send), then we may as well send out all of the pending
+        # RRs for that server. So it may be that by the time we get to waking up
+        # the destination, we don't actually have any RRs left to send out.
         #
-        # For even more background, see https://github.com/matrix-org/synapse/issues/4730.
+        # For even more background, see
+        # https://github.com/matrix-org/synapse/issues/4730.
 
         room_id = receipt.room_id
 
+        # Local read receipts always have 1 event ID.
+        event_id = receipt.event_ids[0]
+
         # Work out which remote servers should be poked and poke them.
         domains_set = await self._storage_controllers.state.get_current_hosts_in_room_or_partial_state_approximation(
             room_id
@@ -797,49 +806,51 @@ class FederationSender(AbstractFederationSender):
         if not domains:
             return
 
-        queues_pending_flush = self._queues_awaiting_rr_flush_by_room.get(room_id)
+        # We now split which domains we want to wake up immediately vs which we
+        # want to delay waking up.
+        immediate_domains: StrCollection
+        delay_domains: StrCollection
 
-        # if there is no flush yet scheduled, we will send out these receipts with
-        # immediate flushes, and schedule the next flush for this room.
-        if queues_pending_flush is not None:
-            logger.debug("Queuing receipt for: %r", domains)
+        if len(domains) < 10:
+            # For "small" rooms send to all domains immediately
+            immediate_domains = domains
+            delay_domains = ()
         else:
-            logger.debug("Sending receipt to: %r", domains)
-            self._schedule_rr_flush_for_room(room_id, len(domains))
+            metadata = await self.store.get_metadata_for_event(
+                receipt.room_id, event_id
+            )
+            assert metadata is not None
 
-        for domain in domains:
+            sender_domain = get_domain_from_id(metadata.sender)
+
+            if self.clock.time_msec() - metadata.received_ts < 60_000:
+                # We always send receipts for recent messages immediately
+                immediate_domains = domains
+                delay_domains = ()
+            else:
+                # Otherwise, we delay waking up all destinations except for the
+                # sender's domain.
+                immediate_domains = []
+                delay_domains = []
+                for domain in domains:
+                    if domain == sender_domain:
+                        immediate_domains.append(domain)
+                    else:
+                        delay_domains.append(domain)
+
+        for domain in immediate_domains:
+            # Add to destination queue and wake the destination up
+            queue = self._get_per_destination_queue(domain)
+            queue.queue_read_receipt(receipt)
+            queue.attempt_new_transaction()
+
+        for domain in delay_domains:
+            # Add to destination queue...
             queue = self._get_per_destination_queue(domain)
             queue.queue_read_receipt(receipt)
 
-            # if there is already a RR flush pending for this room, then make sure this
-            # destination is registered for the flush
-            if queues_pending_flush is not None:
-                queues_pending_flush.add(queue)
-            else:
-                queue.flush_read_receipts_for_room(room_id)
-
-    def _schedule_rr_flush_for_room(self, room_id: str, n_domains: int) -> None:
-        # that is going to cause approximately len(domains) transactions, so now back
-        # off for that multiplied by RR_TXN_INTERVAL_PER_ROOM
-        backoff_ms = self._rr_txn_interval_per_room_ms * n_domains
-
-        logger.debug("Scheduling RR flush in %s in %d ms", room_id, backoff_ms)
-        self.clock.call_later(backoff_ms, self._flush_rrs_for_room, room_id)
-        self._queues_awaiting_rr_flush_by_room[room_id] = set()
-
-    def _flush_rrs_for_room(self, room_id: str) -> None:
-        queues = self._queues_awaiting_rr_flush_by_room.pop(room_id)
-        logger.debug("Flushing RRs in %s to %s", room_id, queues)
-
-        if not queues:
-            # no more RRs arrived for this room; we are done.
-            return
-
-        # schedule the next flush
-        self._schedule_rr_flush_for_room(room_id, len(queues))
-
-        for queue in queues:
-            queue.flush_read_receipts_for_room(room_id)
+            # ... and schedule the destination to be woken up.
+            self._destination_wakeup_queue.add_to_queue(domain)
 
     async def send_presence_to_destinations(
         self, states: Iterable[UserPresenceState], destinations: Iterable[str]
diff --git a/synapse/federation/sender/per_destination_queue.py b/synapse/federation/sender/per_destination_queue.py
index d097e65ea7..b3f65e8237 100644
--- a/synapse/federation/sender/per_destination_queue.py
+++ b/synapse/federation/sender/per_destination_queue.py
@@ -156,7 +156,6 @@ class PerDestinationQueue:
         # Each receipt can only have a single receipt per
         # (room ID, receipt type, user ID, thread ID) tuple.
         self._pending_receipt_edus: List[Dict[str, Dict[str, Dict[str, dict]]]] = []
-        self._rrs_pending_flush = False
 
         # stream_id of last successfully sent to-device message.
         # NB: may be a long or an int.
@@ -258,15 +257,7 @@ class PerDestinationQueue:
                 }
             )
 
-    def flush_read_receipts_for_room(self, room_id: str) -> None:
-        # If there are any pending receipts for this room then force-flush them
-        # in a new transaction.
-        for edu in self._pending_receipt_edus:
-            if room_id in edu:
-                self._rrs_pending_flush = True
-                self.attempt_new_transaction()
-                # No use in checking remaining EDUs if the room was found.
-                break
+        self.mark_new_data()
 
     def send_keyed_edu(self, edu: Edu, key: Hashable) -> None:
         self._pending_edus_keyed[(edu.edu_type, key)] = edu
@@ -603,12 +594,9 @@ class PerDestinationQueue:
                     self._destination, last_successful_stream_ordering
                 )
 
-    def _get_receipt_edus(self, force_flush: bool, limit: int) -> Iterable[Edu]:
+    def _get_receipt_edus(self, limit: int) -> Iterable[Edu]:
         if not self._pending_receipt_edus:
             return
-        if not force_flush and not self._rrs_pending_flush:
-            # not yet time for this lot
-            return
 
         # Send at most limit EDUs for receipts.
         for content in self._pending_receipt_edus[:limit]:
@@ -747,7 +735,7 @@ class _TransactionQueueManager:
             )
 
         # Add read receipt EDUs.
-        pending_edus.extend(self.queue._get_receipt_edus(force_flush=False, limit=5))
+        pending_edus.extend(self.queue._get_receipt_edus(limit=5))
         edu_limit = MAX_EDUS_PER_TRANSACTION - len(pending_edus)
 
         # Next, prioritize to-device messages so that existing encryption channels
@@ -795,13 +783,6 @@ class _TransactionQueueManager:
         if not self._pdus and not pending_edus:
             return [], []
 
-        # if we've decided to send a transaction anyway, and we have room, we
-        # may as well send any pending RRs
-        if edu_limit:
-            pending_edus.extend(
-                self.queue._get_receipt_edus(force_flush=True, limit=edu_limit)
-            )
-
         if self._pdus:
             self._last_stream_ordering = self._pdus[
                 -1
diff --git a/synapse/federation/transport/server/__init__.py b/synapse/federation/transport/server/__init__.py
index 43102567db..174d02ab6b 100644
--- a/synapse/federation/transport/server/__init__.py
+++ b/synapse/federation/transport/server/__init__.py
@@ -20,9 +20,7 @@
 #
 #
 import logging
-from typing import TYPE_CHECKING, Dict, Iterable, List, Optional, Tuple, Type
-
-from typing_extensions import Literal
+from typing import TYPE_CHECKING, Dict, Iterable, List, Literal, Optional, Tuple, Type
 
 from synapse.api.errors import FederationDeniedError, SynapseError
 from synapse.federation.transport.server._base import (
diff --git a/synapse/federation/transport/server/federation.py b/synapse/federation/transport/server/federation.py
index 093ba30d31..eb96ff27f9 100644
--- a/synapse/federation/transport/server/federation.py
+++ b/synapse/federation/transport/server/federation.py
@@ -24,6 +24,7 @@ from typing import (
     TYPE_CHECKING,
     Dict,
     List,
+    Literal,
     Mapping,
     Optional,
     Sequence,
@@ -32,8 +33,6 @@ from typing import (
     Union,
 )
 
-from typing_extensions import Literal
-
 from synapse.api.constants import Direction, EduTypes
 from synapse.api.errors import Codes, SynapseError
 from synapse.api.room_versions import RoomVersions
diff --git a/synapse/handlers/admin.py b/synapse/handlers/admin.py
index d1989e9d2c..f3e7790d43 100644
--- a/synapse/handlers/admin.py
+++ b/synapse/handlers/admin.py
@@ -124,6 +124,7 @@ class AdminHandler:
             "consent_ts": user_info.consent_ts,
             "user_type": user_info.user_type,
             "is_guest": user_info.is_guest,
+            "suspended": user_info.suspended,
         }
 
         if self._msc3866_enabled:
@@ -472,7 +473,7 @@ class AdminHandler:
                     "type": EventTypes.Redaction,
                     "content": {"reason": reason} if reason else {},
                     "room_id": room,
-                    "sender": user_id,
+                    "sender": requester.user.to_string(),
                 }
                 if room_version.updated_redaction_rules:
                     event_dict["content"]["redacts"] = event.event_id
diff --git a/synapse/handlers/appservice.py b/synapse/handlers/appservice.py
index 4b33e1330d..b7d1033351 100644
--- a/synapse/handlers/appservice.py
+++ b/synapse/handlers/appservice.py
@@ -896,10 +896,10 @@ class ApplicationServicesHandler:
         results = await make_deferred_yieldable(
             defer.DeferredList(
                 [
-                    run_in_background(
+                    run_in_background(  # type: ignore[call-overload]
                         self.appservice_api.claim_client_keys,
                         # We know this must be an app service.
-                        self.store.get_app_service_by_id(service_id),  # type: ignore[arg-type]
+                        self.store.get_app_service_by_id(service_id),
                         service_query,
                     )
                     for service_id, service_query in query_by_appservice.items()
@@ -952,10 +952,10 @@ class ApplicationServicesHandler:
         results = await make_deferred_yieldable(
             defer.DeferredList(
                 [
-                    run_in_background(
+                    run_in_background(  # type: ignore[call-overload]
                         self.appservice_api.query_keys,
                         # We know this must be an app service.
-                        self.store.get_app_service_by_id(service_id),  # type: ignore[arg-type]
+                        self.store.get_app_service_by_id(service_id),
                         service_query,
                     )
                     for service_id, service_query in query_by_appservice.items()
diff --git a/synapse/handlers/auth.py b/synapse/handlers/auth.py
index 1f4264ad7e..e96922c08d 100644
--- a/synapse/handlers/auth.py
+++ b/synapse/handlers/auth.py
@@ -1579,7 +1579,10 @@ class AuthHandler:
         # for the presence of an email address during password reset was
         # case sensitive).
         if medium == "email":
-            address = canonicalise_email(address)
+            try:
+                address = canonicalise_email(address)
+            except ValueError as e:
+                raise SynapseError(400, str(e))
 
         await self.store.user_add_threepid(
             user_id, medium, address, validated_at, self.hs.get_clock().time_msec()
@@ -1610,7 +1613,10 @@ class AuthHandler:
         """
         # 'Canonicalise' email addresses as per above
         if medium == "email":
-            address = canonicalise_email(address)
+            try:
+                address = canonicalise_email(address)
+            except ValueError as e:
+                raise SynapseError(400, str(e))
 
         await self.store.user_delete_threepid(user_id, medium, address)
 
diff --git a/synapse/handlers/delayed_events.py b/synapse/handlers/delayed_events.py
index 3c88a96fd3..80cb1cec9b 100644
--- a/synapse/handlers/delayed_events.py
+++ b/synapse/handlers/delayed_events.py
@@ -19,6 +19,7 @@ from twisted.internet.interfaces import IDelayedCall
 
 from synapse.api.constants import EventTypes
 from synapse.api.errors import ShadowBanError
+from synapse.api.ratelimiting import Ratelimiter
 from synapse.config.workers import MAIN_PROCESS_INSTANCE_NAME
 from synapse.logging.opentracing import set_tag
 from synapse.metrics import event_processing_positions
@@ -57,10 +58,19 @@ class DelayedEventsHandler:
         self._storage_controllers = hs.get_storage_controllers()
         self._config = hs.config
         self._clock = hs.get_clock()
-        self._request_ratelimiter = hs.get_request_ratelimiter()
         self._event_creation_handler = hs.get_event_creation_handler()
         self._room_member_handler = hs.get_room_member_handler()
 
+        self._request_ratelimiter = hs.get_request_ratelimiter()
+
+        # Ratelimiter for management of existing delayed events,
+        # keyed by the sending user ID & device ID.
+        self._delayed_event_mgmt_ratelimiter = Ratelimiter(
+            store=self._store,
+            clock=self._clock,
+            cfg=self._config.ratelimiting.rc_delayed_event_mgmt,
+        )
+
         self._next_delayed_event_call: Optional[IDelayedCall] = None
 
         # The current position in the current_state_delta stream
@@ -181,18 +191,36 @@ class DelayedEventsHandler:
 
     async def _handle_state_deltas(self, deltas: List[StateDelta]) -> None:
         """
-        Process current state deltas to cancel pending delayed events
+        Process current state deltas to cancel other users' pending delayed events
         that target the same state.
         """
         for delta in deltas:
+            if delta.event_id is None:
+                logger.debug(
+                    "Not handling delta for deleted state: %r %r",
+                    delta.event_type,
+                    delta.state_key,
+                )
+                continue
+
             logger.debug(
                 "Handling: %r %r, %s", delta.event_type, delta.state_key, delta.event_id
             )
 
+            event = await self._store.get_event(
+                delta.event_id, check_room_id=delta.room_id
+            )
+            sender = UserID.from_string(event.sender)
+
             next_send_ts = await self._store.cancel_delayed_state_events(
                 room_id=delta.room_id,
                 event_type=delta.event_type,
                 state_key=delta.state_key,
+                not_from_localpart=(
+                    sender.localpart
+                    if sender.domain == self._config.server.server_name
+                    else ""
+                ),
             )
 
             if self._next_send_ts_changed(next_send_ts):
@@ -227,6 +255,9 @@ class DelayedEventsHandler:
         Raises:
             SynapseError: if the delayed event fails validation checks.
         """
+        # Use standard request limiter for scheduling new delayed events.
+        # TODO: Instead apply ratelimiting based on the scheduled send time.
+        # See https://github.com/element-hq/synapse/issues/18021
         await self._request_ratelimiter.ratelimit(requester)
 
         self._event_creation_handler.validator.validate_builder(
@@ -285,7 +316,10 @@ class DelayedEventsHandler:
             NotFoundError: if no matching delayed event could be found.
         """
         assert self._is_master
-        await self._request_ratelimiter.ratelimit(requester)
+        await self._delayed_event_mgmt_ratelimiter.ratelimit(
+            requester,
+            (requester.user.to_string(), requester.device_id),
+        )
         await self._initialized_from_db
 
         next_send_ts = await self._store.cancel_delayed_event(
@@ -308,7 +342,10 @@ class DelayedEventsHandler:
             NotFoundError: if no matching delayed event could be found.
         """
         assert self._is_master
-        await self._request_ratelimiter.ratelimit(requester)
+        await self._delayed_event_mgmt_ratelimiter.ratelimit(
+            requester,
+            (requester.user.to_string(), requester.device_id),
+        )
         await self._initialized_from_db
 
         next_send_ts = await self._store.restart_delayed_event(
@@ -332,6 +369,8 @@ class DelayedEventsHandler:
             NotFoundError: if no matching delayed event could be found.
         """
         assert self._is_master
+        # Use standard request limiter for sending delayed events on-demand,
+        # as an on-demand send is similar to sending a regular event.
         await self._request_ratelimiter.ratelimit(requester)
         await self._initialized_from_db
 
@@ -415,7 +454,10 @@ class DelayedEventsHandler:
 
     async def get_all_for_user(self, requester: Requester) -> List[JsonDict]:
         """Return all pending delayed events requested by the given user."""
-        await self._request_ratelimiter.ratelimit(requester)
+        await self._delayed_event_mgmt_ratelimiter.ratelimit(
+            requester,
+            (requester.user.to_string(), requester.device_id),
+        )
         return await self._store.get_all_delayed_events_for_user(
             requester.user.localpart
         )
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index d88660e273..d9622080b4 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -729,6 +729,40 @@ class DeviceHandler(DeviceWorkerHandler):
 
         await self.notify_device_update(user_id, device_ids)
 
+    async def upsert_device(
+        self, user_id: str, device_id: str, display_name: Optional[str] = None
+    ) -> bool:
+        """Create or update a device
+
+        Args:
+            user_id: The user to update devices of.
+            device_id: The device to update.
+            display_name: The new display name for this device.
+
+        Returns:
+            True if the device was created, False if it was updated.
+
+        """
+
+        # Reject a new displayname which is too long.
+        self._check_device_name_length(display_name)
+
+        created = await self.store.store_device(
+            user_id,
+            device_id,
+            initial_device_display_name=display_name,
+        )
+
+        if not created:
+            await self.store.update_device(
+                user_id,
+                device_id,
+                new_display_name=display_name,
+            )
+
+        await self.notify_device_update(user_id, [device_id])
+        return created
+
     async def update_device(self, user_id: str, device_id: str, content: dict) -> None:
         """Update the given device
 
diff --git a/synapse/handlers/directory.py b/synapse/handlers/directory.py
index 62ce16794f..48c7d411d5 100644
--- a/synapse/handlers/directory.py
+++ b/synapse/handlers/directory.py
@@ -21,9 +21,7 @@
 
 import logging
 import string
-from typing import TYPE_CHECKING, Iterable, List, Optional, Sequence
-
-from typing_extensions import Literal
+from typing import TYPE_CHECKING, Iterable, List, Literal, Optional, Sequence
 
 from synapse.api.constants import MAX_ALIAS_LENGTH, EventTypes
 from synapse.api.errors import (
diff --git a/synapse/handlers/e2e_room_keys.py b/synapse/handlers/e2e_room_keys.py
index f397911f28..623fd33f13 100644
--- a/synapse/handlers/e2e_room_keys.py
+++ b/synapse/handlers/e2e_room_keys.py
@@ -20,9 +20,7 @@
 #
 
 import logging
-from typing import TYPE_CHECKING, Dict, Optional, cast
-
-from typing_extensions import Literal
+from typing import TYPE_CHECKING, Dict, Literal, Optional, cast
 
 from synapse.api.errors import (
     Codes,
diff --git a/synapse/handlers/federation_event.py b/synapse/handlers/federation_event.py
index c85deaed56..1e738f484f 100644
--- a/synapse/handlers/federation_event.py
+++ b/synapse/handlers/federation_event.py
@@ -151,6 +151,8 @@ class FederationEventHandler:
     def __init__(self, hs: "HomeServer"):
         self._clock = hs.get_clock()
         self._store = hs.get_datastores().main
+        self._state_store = hs.get_datastores().state
+        self._state_deletion_store = hs.get_datastores().state_deletion
         self._storage_controllers = hs.get_storage_controllers()
         self._state_storage_controller = self._storage_controllers.state
 
@@ -580,7 +582,9 @@ class FederationEventHandler:
                         room_version.identifier,
                         state_maps_to_resolve,
                         event_map=None,
-                        state_res_store=StateResolutionStore(self._store),
+                        state_res_store=StateResolutionStore(
+                            self._store, self._state_deletion_store
+                        ),
                     )
                 )
             else:
@@ -1179,7 +1183,9 @@ class FederationEventHandler:
                 room_version,
                 state_maps,
                 event_map={event_id: event},
-                state_res_store=StateResolutionStore(self._store),
+                state_res_store=StateResolutionStore(
+                    self._store, self._state_deletion_store
+                ),
             )
 
         except Exception as e:
@@ -1874,7 +1880,9 @@ class FederationEventHandler:
                     room_version,
                     [local_state_id_map, claimed_auth_events_id_map],
                     event_map=None,
-                    state_res_store=StateResolutionStore(self._store),
+                    state_res_store=StateResolutionStore(
+                        self._store, self._state_deletion_store
+                    ),
                 )
             )
         else:
@@ -2014,7 +2022,9 @@ class FederationEventHandler:
                     room_version,
                     state_sets,
                     event_map=None,
-                    state_res_store=StateResolutionStore(self._store),
+                    state_res_store=StateResolutionStore(
+                        self._store, self._state_deletion_store
+                    ),
                 )
             )
         else:
@@ -2272,8 +2282,9 @@ class FederationEventHandler:
                 event_and_contexts, backfilled=backfilled
             )
 
-            # After persistence we always need to notify replication there may
-            # be new data.
+            # After persistence, we never notify clients (wake up `/sync` streams) about
+            # backfilled events but it's important to let all the workers know about any
+            # new event (backfilled or not) because TODO
             self._notifier.notify_replication()
 
             if self._ephemeral_messages_enabled:
diff --git a/synapse/handlers/message.py b/synapse/handlers/message.py
index df3010ecf6..52c61cfa54 100644
--- a/synapse/handlers/message.py
+++ b/synapse/handlers/message.py
@@ -644,11 +644,33 @@ class EventCreationHandler:
         """
         await self.auth_blocking.check_auth_blocking(requester=requester)
 
-        if event_dict["type"] == EventTypes.Message:
-            requester_suspended = await self.store.get_user_suspended_status(
-                requester.user.to_string()
-            )
-            if requester_suspended:
+        requester_suspended = await self.store.get_user_suspended_status(
+            requester.user.to_string()
+        )
+        if requester_suspended:
+            # We want to allow suspended users to perform "corrective" actions
+            # asked of them by server admins, such as redact their messages and
+            # leave rooms.
+            if event_dict["type"] in ["m.room.redaction", "m.room.member"]:
+                if event_dict["type"] == "m.room.redaction":
+                    event = await self.store.get_event(
+                        event_dict["content"]["redacts"], allow_none=True
+                    )
+                    if event:
+                        if event.sender != requester.user.to_string():
+                            raise SynapseError(
+                                403,
+                                "You can only redact your own events while account is suspended.",
+                                Codes.USER_ACCOUNT_SUSPENDED,
+                            )
+                if event_dict["type"] == "m.room.member":
+                    if event_dict["content"]["membership"] != "leave":
+                        raise SynapseError(
+                            403,
+                            "Changing membership while account is suspended is not allowed.",
+                            Codes.USER_ACCOUNT_SUSPENDED,
+                        )
+            else:
                 raise SynapseError(
                     403,
                     "Sending messages while account is suspended is not allowed.",
@@ -1440,6 +1462,12 @@ class EventCreationHandler:
                     )
                     return prev_event
 
+            if not event.is_state() and event.type in [
+                EventTypes.Message,
+                EventTypes.Encrypted,
+            ]:
+                await self.store.set_room_participation(event.user_id, event.room_id)
+
             if event.internal_metadata.is_out_of_band_membership():
                 # the only sort of out-of-band-membership events we expect to see here are
                 # invite rejections and rescinded knocks that we have generated ourselves.
diff --git a/synapse/handlers/oidc.py b/synapse/handlers/oidc.py
index 22b59829fa..18efdd9f6e 100644
--- a/synapse/handlers/oidc.py
+++ b/synapse/handlers/oidc.py
@@ -31,6 +31,7 @@ from typing import (
     List,
     Optional,
     Type,
+    TypedDict,
     TypeVar,
     Union,
 )
@@ -52,7 +53,6 @@ from pymacaroons.exceptions import (
     MacaroonInitException,
     MacaroonInvalidSignatureException,
 )
-from typing_extensions import TypedDict
 
 from twisted.web.client import readBody
 from twisted.web.http_headers import Headers
@@ -382,7 +382,12 @@ class OidcProvider:
         self._macaroon_generaton = macaroon_generator
 
         self._config = provider
-        self._callback_url: str = hs.config.oidc.oidc_callback_url
+
+        self._callback_url: str
+        if provider.redirect_uri is not None:
+            self._callback_url = provider.redirect_uri
+        else:
+            self._callback_url = hs.config.oidc.oidc_callback_url
 
         # Calculate the prefix for OIDC callback paths based on the public_baseurl.
         # We'll insert this into the Path= parameter of any session cookies we set.
@@ -640,6 +645,11 @@ class OidcProvider:
         elif self._config.pkce_method == "never":
             metadata.pop("code_challenge_methods_supported", None)
 
+        if self._config.id_token_signing_alg_values_supported:
+            metadata["id_token_signing_alg_values_supported"] = (
+                self._config.id_token_signing_alg_values_supported
+            )
+
         self._validate_metadata(metadata)
 
         return metadata
@@ -1002,7 +1012,21 @@ class OidcProvider:
         """
 
         state = generate_token()
-        nonce = generate_token()
+
+        # Generate a nonce 32 characters long. When encoded with base64url later on,
+        # the nonce will be 43 characters when sent to the identity provider.
+        #
+        # While RFC7636 does not specify a minimum length for the `nonce`
+        # parameter, the TI-Messenger IDP_FD spec v1.7.3 does require it to be
+        # between 43 and 128 characters. This spec concerns using Matrix for
+        # communication in German healthcare.
+        #
+        # As increasing the length only strengthens security, we use this length
+        # to allow TI-Messenger deployments using Synapse to satisfy this
+        # external spec.
+        #
+        # See https://github.com/element-hq/synapse/pull/18109 for more context.
+        nonce = generate_token(length=32)
         code_verifier = ""
 
         if not client_redirect_url:
diff --git a/synapse/handlers/profile.py b/synapse/handlers/profile.py
index ac4544ca4c..cdc388b4ab 100644
--- a/synapse/handlers/profile.py
+++ b/synapse/handlers/profile.py
@@ -22,6 +22,7 @@ import logging
 import random
 from typing import TYPE_CHECKING, List, Optional, Union
 
+from synapse.api.constants import ProfileFields
 from synapse.api.errors import (
     AuthError,
     Codes,
@@ -31,7 +32,7 @@ from synapse.api.errors import (
     SynapseError,
 )
 from synapse.storage.databases.main.media_repository import LocalMedia, RemoteMedia
-from synapse.types import JsonDict, Requester, UserID, create_requester
+from synapse.types import JsonDict, JsonValue, Requester, UserID, create_requester
 from synapse.util.caches.descriptors import cached
 from synapse.util.stringutils import parse_and_validate_mxc_uri
 
@@ -42,6 +43,8 @@ logger = logging.getLogger(__name__)
 
 MAX_DISPLAYNAME_LEN = 256
 MAX_AVATAR_URL_LEN = 1000
+# Field name length is specced at 255 bytes.
+MAX_CUSTOM_FIELD_LEN = 255
 
 
 class ProfileHandler:
@@ -83,19 +86,33 @@ class ProfileHandler:
 
         Returns:
             A JSON dictionary. For local queries this will include the displayname and avatar_url
-            fields. For remote queries it may contain arbitrary information.
+            fields, if set. For remote queries it may contain arbitrary information.
         """
         target_user = UserID.from_string(user_id)
 
         if self.hs.is_mine(target_user):
             profileinfo = await self.store.get_profileinfo(target_user)
-            if profileinfo.display_name is None and profileinfo.avatar_url is None:
+            extra_fields = {}
+            if self.hs.config.experimental.msc4133_enabled:
+                extra_fields = await self.store.get_profile_fields(target_user)
+
+            if (
+                profileinfo.display_name is None
+                and profileinfo.avatar_url is None
+                and not extra_fields
+            ):
                 raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
 
-            return {
-                "displayname": profileinfo.display_name,
-                "avatar_url": profileinfo.avatar_url,
-            }
+            # Do not include display name or avatar if unset.
+            ret = {}
+            if profileinfo.display_name is not None:
+                ret[ProfileFields.DISPLAYNAME] = profileinfo.display_name
+            if profileinfo.avatar_url is not None:
+                ret[ProfileFields.AVATAR_URL] = profileinfo.avatar_url
+            if extra_fields:
+                ret.update(extra_fields)
+
+            return ret
         else:
             try:
                 result = await self.federation.make_query(
@@ -399,6 +416,110 @@ class ProfileHandler:
 
         return True
 
+    async def get_profile_field(
+        self, target_user: UserID, field_name: str
+    ) -> JsonValue:
+        """
+        Fetch a user's profile from the database for local users and over federation
+        for remote users.
+
+        Args:
+            target_user: The user ID to fetch the profile for.
+            field_name: The field to fetch the profile for.
+
+        Returns:
+            The value for the profile field or None if the field does not exist.
+        """
+        if self.hs.is_mine(target_user):
+            try:
+                field_value = await self.store.get_profile_field(
+                    target_user, field_name
+                )
+            except StoreError as e:
+                if e.code == 404:
+                    raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
+                raise
+
+            return field_value
+        else:
+            try:
+                result = await self.federation.make_query(
+                    destination=target_user.domain,
+                    query_type="profile",
+                    args={"user_id": target_user.to_string(), "field": field_name},
+                    ignore_backoff=True,
+                )
+            except RequestSendFailed as e:
+                raise SynapseError(502, "Failed to fetch profile") from e
+            except HttpResponseException as e:
+                raise e.to_synapse_error()
+
+            return result.get(field_name)
+
+    async def set_profile_field(
+        self,
+        target_user: UserID,
+        requester: Requester,
+        field_name: str,
+        new_value: JsonValue,
+        by_admin: bool = False,
+        deactivation: bool = False,
+    ) -> None:
+        """Set a new profile field for a user.
+
+        Args:
+            target_user: the user whose profile is to be changed.
+            requester: The user attempting to make this change.
+            field_name: The name of the profile field to update.
+            new_value: The new field value for this user.
+            by_admin: Whether this change was made by an administrator.
+            deactivation: Whether this change was made while deactivating the user.
+        """
+        if not self.hs.is_mine(target_user):
+            raise SynapseError(400, "User is not hosted on this homeserver")
+
+        if not by_admin and target_user != requester.user:
+            raise AuthError(403, "Cannot set another user's profile")
+
+        await self.store.set_profile_field(target_user, field_name, new_value)
+
+        # Custom fields do not propagate into the user directory *or* rooms.
+        profile = await self.store.get_profileinfo(target_user)
+        await self._third_party_rules.on_profile_update(
+            target_user.to_string(), profile, by_admin, deactivation
+        )
+
+    async def delete_profile_field(
+        self,
+        target_user: UserID,
+        requester: Requester,
+        field_name: str,
+        by_admin: bool = False,
+        deactivation: bool = False,
+    ) -> None:
+        """Delete a field from a user's profile.
+
+        Args:
+            target_user: the user whose profile is to be changed.
+            requester: The user attempting to make this change.
+            field_name: The name of the profile field to remove.
+            by_admin: Whether this change was made by an administrator.
+            deactivation: Whether this change was made while deactivating the user.
+        """
+        if not self.hs.is_mine(target_user):
+            raise SynapseError(400, "User is not hosted on this homeserver")
+
+        if not by_admin and target_user != requester.user:
+            raise AuthError(400, "Cannot set another user's profile")
+
+        await self.store.delete_profile_field(target_user, field_name)
+
+        # Custom fields do not propagate into the user directory *or* rooms.
+        profile = await self.store.get_profileinfo(target_user)
+        await self._third_party_rules.on_profile_update(
+            target_user.to_string(), profile, by_admin, deactivation
+        )
+
     async def on_profile_query(self, args: JsonDict) -> JsonDict:
         """Handles federation profile query requests."""
 
@@ -415,13 +536,24 @@ class ProfileHandler:
 
         just_field = args.get("field", None)
 
-        response = {}
+        response: JsonDict = {}
         try:
-            if just_field is None or just_field == "displayname":
+            if just_field is None or just_field == ProfileFields.DISPLAYNAME:
                 response["displayname"] = await self.store.get_profile_displayname(user)
 
-            if just_field is None or just_field == "avatar_url":
+            if just_field is None or just_field == ProfileFields.AVATAR_URL:
                 response["avatar_url"] = await self.store.get_profile_avatar_url(user)
+
+            if self.hs.config.experimental.msc4133_enabled:
+                if just_field is None:
+                    response.update(await self.store.get_profile_fields(user))
+                elif just_field not in (
+                    ProfileFields.DISPLAYNAME,
+                    ProfileFields.AVATAR_URL,
+                ):
+                    response[just_field] = await self.store.get_profile_field(
+                        user, just_field
+                    )
         except StoreError as e:
             if e.code == 404:
                 raise SynapseError(404, "Profile was not found", Codes.NOT_FOUND)
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index c200e29569..ecfea175c7 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -23,10 +23,9 @@
 """Contains functions for registering clients."""
 
 import logging
-from typing import TYPE_CHECKING, Iterable, List, Optional, Tuple
+from typing import TYPE_CHECKING, Iterable, List, Optional, Tuple, TypedDict
 
 from prometheus_client import Counter
-from typing_extensions import TypedDict
 
 from synapse import types
 from synapse.api.constants import (
@@ -630,7 +629,9 @@ class RegistrationHandler:
         """
         await self._auto_join_rooms(user_id)
 
-    async def appservice_register(self, user_localpart: str, as_token: str) -> str:
+    async def appservice_register(
+        self, user_localpart: str, as_token: str
+    ) -> Tuple[str, ApplicationService]:
         user = UserID(user_localpart, self.hs.hostname)
         user_id = user.to_string()
         service = self.store.get_app_service_by_token(as_token)
@@ -653,7 +654,7 @@ class RegistrationHandler:
             appservice_id=service_id,
             create_profile_with_displayname=user.localpart,
         )
-        return user_id
+        return (user_id, service)
 
     def check_user_id_not_appservice_exclusive(
         self, user_id: str, allowed_appservice: Optional[ApplicationService] = None
diff --git a/synapse/handlers/send_email.py b/synapse/handlers/send_email.py
index 70cdb0721c..8cf8d2bada 100644
--- a/synapse/handlers/send_email.py
+++ b/synapse/handlers/send_email.py
@@ -47,15 +47,45 @@ logger = logging.getLogger(__name__)
 _is_old_twisted = parse_version(twisted.__version__) < parse_version("21")
 
 
-class _NoTLSESMTPSender(ESMTPSender):
-    """Extend ESMTPSender to disable TLS
+class _BackportESMTPSender(ESMTPSender):
+    """Extend old versions of ESMTPSender to configure TLS.
 
-    Unfortunately, before Twisted 21.2, ESMTPSender doesn't give an easy way to disable
-    TLS, so we override its internal method which it uses to generate a context factory.
+    Unfortunately, before Twisted 21.2, ESMTPSender doesn't give an easy way to
+    disable TLS, or to configure the hostname used for TLS certificate validation.
+    This backports the `hostname` parameter for that functionality.
     """
 
+    __hostname: Optional[str]
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        """"""
+        self.__hostname = kwargs.pop("hostname", None)
+        super().__init__(*args, **kwargs)
+
     def _getContextFactory(self) -> Optional[IOpenSSLContextFactory]:
-        return None
+        if self.context is not None:
+            return self.context
+        elif self.__hostname is None:
+            return None  # disable TLS if hostname is None
+        return optionsForClientTLS(self.__hostname)
+
+
+class _BackportESMTPSenderFactory(ESMTPSenderFactory):
+    """An ESMTPSenderFactory for _BackportESMTPSender.
+
+    This backports the `hostname` parameter, to disable or configure TLS.
+    """
+
+    __hostname: Optional[str]
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        self.__hostname = kwargs.pop("hostname", None)
+        super().__init__(*args, **kwargs)
+
+    def protocol(self, *args: Any, **kwargs: Any) -> ESMTPSender:  # type: ignore
+        # this overrides ESMTPSenderFactory's `protocol` attribute, with a Callable
+        # instantiating our _BackportESMTPSender, providing the hostname parameter
+        return _BackportESMTPSender(*args, **kwargs, hostname=self.__hostname)
 
 
 async def _sendmail(
@@ -71,6 +101,7 @@ async def _sendmail(
     require_tls: bool = False,
     enable_tls: bool = True,
     force_tls: bool = False,
+    tlsname: Optional[str] = None,
 ) -> None:
     """A simple wrapper around ESMTPSenderFactory, to allow substitution in tests
 
@@ -88,39 +119,33 @@ async def _sendmail(
         enable_tls: True to enable STARTTLS. If this is False and require_tls is True,
            the request will fail.
         force_tls: True to enable Implicit TLS.
+        tlsname: the domain name expected as the TLS certificate's commonname,
+           defaults to smtphost.
     """
     msg = BytesIO(msg_bytes)
     d: "Deferred[object]" = Deferred()
+    if not enable_tls:
+        tlsname = None
+    elif tlsname is None:
+        tlsname = smtphost
 
-    def build_sender_factory(**kwargs: Any) -> ESMTPSenderFactory:
-        return ESMTPSenderFactory(
-            username,
-            password,
-            from_addr,
-            to_addr,
-            msg,
-            d,
-            heloFallback=True,
-            requireAuthentication=require_auth,
-            requireTransportSecurity=require_tls,
-            **kwargs,
-        )
-
-    factory: IProtocolFactory
-    if _is_old_twisted:
-        # before twisted 21.2, we have to override the ESMTPSender protocol to disable
-        # TLS
-        factory = build_sender_factory()
-
-        if not enable_tls:
-            factory.protocol = _NoTLSESMTPSender
-    else:
-        # for twisted 21.2 and later, there is a 'hostname' parameter which we should
-        # set to enable TLS.
-        factory = build_sender_factory(hostname=smtphost if enable_tls else None)
+    factory: IProtocolFactory = (
+        _BackportESMTPSenderFactory if _is_old_twisted else ESMTPSenderFactory
+    )(
+        username,
+        password,
+        from_addr,
+        to_addr,
+        msg,
+        d,
+        heloFallback=True,
+        requireAuthentication=require_auth,
+        requireTransportSecurity=require_tls,
+        hostname=tlsname,
+    )
 
     if force_tls:
-        factory = TLSMemoryBIOFactory(optionsForClientTLS(smtphost), True, factory)
+        factory = TLSMemoryBIOFactory(optionsForClientTLS(tlsname), True, factory)
 
     endpoint = HostnameEndpoint(
         reactor, smtphost, smtpport, timeout=30, bindAddress=None
@@ -148,6 +173,7 @@ class SendEmailHandler:
         self._require_transport_security = hs.config.email.require_transport_security
         self._enable_tls = hs.config.email.enable_smtp_tls
         self._force_tls = hs.config.email.force_tls
+        self._tlsname = hs.config.email.email_tlsname
 
         self._sendmail = _sendmail
 
@@ -227,4 +253,5 @@ class SendEmailHandler:
             require_tls=self._require_transport_security,
             enable_tls=self._enable_tls,
             force_tls=self._force_tls,
+            tlsname=self._tlsname,
         )
diff --git a/synapse/handlers/sliding_sync/__init__.py b/synapse/handlers/sliding_sync/__init__.py
index 0175da1a13..459d3c3e24 100644
--- a/synapse/handlers/sliding_sync/__init__.py
+++ b/synapse/handlers/sliding_sync/__init__.py
@@ -1022,15 +1022,21 @@ class SlidingSyncHandler:
                             and state_key == StateValues.LAZY
                         ):
                             lazy_load_room_members = True
+
                             # Everyone in the timeline is relevant
-                            #
-                            # FIXME: We probably also care about invite, ban, kick, targets, etc
-                            # but the spec only mentions "senders".
                             timeline_membership: Set[str] = set()
                             if timeline_events is not None:
                                 for timeline_event in timeline_events:
+                                    # Anyone who sent a message is relevant
                                     timeline_membership.add(timeline_event.sender)
 
+                                    # We also care about invite, ban, kick, targets,
+                                    # etc.
+                                    if timeline_event.type == EventTypes.Member:
+                                        timeline_membership.add(
+                                            timeline_event.state_key
+                                        )
+
                             # Update the required state filter so we pick up the new
                             # membership
                             for user_id in timeline_membership:
diff --git a/synapse/handlers/sso.py b/synapse/handlers/sso.py
index ee74289b6c..9c0d665461 100644
--- a/synapse/handlers/sso.py
+++ b/synapse/handlers/sso.py
@@ -33,17 +33,17 @@ from typing import (
     Mapping,
     NoReturn,
     Optional,
+    Protocol,
     Set,
 )
 from urllib.parse import urlencode
 
 import attr
-from typing_extensions import Protocol
 
 from twisted.web.iweb import IRequest
 from twisted.web.server import Request
 
-from synapse.api.constants import LoginType
+from synapse.api.constants import LoginType, ProfileFields
 from synapse.api.errors import Codes, NotFoundError, RedirectException, SynapseError
 from synapse.config.sso import SsoAttributeRequirement
 from synapse.handlers.device import DeviceHandler
@@ -813,9 +813,10 @@ class SsoHandler:
 
             # bail if user already has the same avatar
             profile = await self._profile_handler.get_profile(user_id)
-            if profile["avatar_url"] is not None:
-                server_name = profile["avatar_url"].split("/")[-2]
-                media_id = profile["avatar_url"].split("/")[-1]
+            if ProfileFields.AVATAR_URL in profile:
+                avatar_url_parts = profile[ProfileFields.AVATAR_URL].split("/")
+                server_name = avatar_url_parts[-2]
+                media_id = avatar_url_parts[-1]
                 if self._is_mine_server_name(server_name):
                     media = await self._media_repo.store.get_local_media(media_id)  # type: ignore[has-type]
                     if media is not None and upload_name == media.upload_name:
@@ -1276,12 +1277,16 @@ def _check_attribute_requirement(
         return False
 
     # If the requirement is None, the attribute existing is enough.
-    if req.value is None:
+    if req.value is None and req.one_of is None:
         return True
 
     values = attributes[req.attribute]
     if req.value in values:
         return True
+    if req.one_of:
+        for value in req.one_of:
+            if value in values:
+                return True
 
     logger.info(
         "SSO attribute %s did not match required value '%s' (was '%s')",
diff --git a/synapse/handlers/user_directory.py b/synapse/handlers/user_directory.py
index a343637b82..f88d39b38f 100644
--- a/synapse/handlers/user_directory.py
+++ b/synapse/handlers/user_directory.py
@@ -26,7 +26,13 @@ from typing import TYPE_CHECKING, List, Optional, Set, Tuple
 from twisted.internet.interfaces import IDelayedCall
 
 import synapse.metrics
-from synapse.api.constants import EventTypes, HistoryVisibility, JoinRules, Membership
+from synapse.api.constants import (
+    EventTypes,
+    HistoryVisibility,
+    JoinRules,
+    Membership,
+    ProfileFields,
+)
 from synapse.api.errors import Codes, SynapseError
 from synapse.handlers.state_deltas import MatchChange, StateDeltasHandler
 from synapse.metrics.background_process_metrics import run_as_background_process
@@ -161,7 +167,7 @@ class UserDirectoryHandler(StateDeltasHandler):
         non_spammy_users = []
         for user in results["results"]:
             if not await self._spam_checker_module_callbacks.check_username_for_spam(
-                user
+                user, user_id
             ):
                 non_spammy_users.append(user)
         results["results"] = non_spammy_users
@@ -756,6 +762,10 @@ class UserDirectoryHandler(StateDeltasHandler):
 
                 await self.store.update_profile_in_user_dir(
                     user_id,
-                    display_name=non_null_str_or_none(profile.get("displayname")),
-                    avatar_url=non_null_str_or_none(profile.get("avatar_url")),
+                    display_name=non_null_str_or_none(
+                        profile.get(ProfileFields.DISPLAYNAME)
+                    ),
+                    avatar_url=non_null_str_or_none(
+                        profile.get(ProfileFields.AVATAR_URL)
+                    ),
                 )
diff --git a/synapse/handlers/worker_lock.py b/synapse/handlers/worker_lock.py
index db998f6701..e58a416026 100644
--- a/synapse/handlers/worker_lock.py
+++ b/synapse/handlers/worker_lock.py
@@ -19,6 +19,7 @@
 #
 #
 
+import logging
 import random
 from types import TracebackType
 from typing import (
@@ -269,6 +270,10 @@ class WaitingLock:
     def _get_next_retry_interval(self) -> float:
         next = self._retry_interval
         self._retry_interval = max(5, next * 2)
+        if self._retry_interval > 5 * 2 ^ 7:  # ~10 minutes
+            logging.warning(
+                f"Lock timeout is getting excessive: {self._retry_interval}s. There may be a deadlock."
+            )
         return next * random.uniform(0.9, 1.1)
 
 
@@ -344,4 +349,8 @@ class WaitingMultiLock:
     def _get_next_retry_interval(self) -> float:
         next = self._retry_interval
         self._retry_interval = max(5, next * 2)
+        if self._retry_interval > 5 * 2 ^ 7:  # ~10 minutes
+            logging.warning(
+                f"Lock timeout is getting excessive: {self._retry_interval}s. There may be a deadlock."
+            )
         return next * random.uniform(0.9, 1.1)
diff --git a/synapse/http/client.py b/synapse/http/client.py
index 85923d956b..84a510fb42 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -31,6 +31,7 @@ from typing import (
     List,
     Mapping,
     Optional,
+    Protocol,
     Tuple,
     Union,
 )
@@ -40,8 +41,7 @@ import treq
 from canonicaljson import encode_canonical_json
 from netaddr import AddrFormatError, IPAddress, IPSet
 from prometheus_client import Counter
-from typing_extensions import Protocol
-from zope.interface import implementer, provider
+from zope.interface import implementer
 
 from OpenSSL import SSL
 from OpenSSL.SSL import VERIFY_NONE
@@ -225,7 +225,7 @@ class _IPBlockingResolver:
                     recv.addressResolved(address)
             recv.resolutionComplete()
 
-        @provider(IResolutionReceiver)
+        @implementer(IResolutionReceiver)
         class EndpointReceiver:
             @staticmethod
             def resolutionBegan(resolutionInProgress: IHostResolution) -> None:
@@ -239,8 +239,9 @@ class _IPBlockingResolver:
             def resolutionComplete() -> None:
                 _callback()
 
+        endpoint_receiver_wrapper = EndpointReceiver()
         self._reactor.nameResolver.resolveHostName(
-            EndpointReceiver, hostname, portNumber=portNumber
+            endpoint_receiver_wrapper, hostname, portNumber=portNumber
         )
 
         return recv
diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py
index e658c68e23..f6d2536957 100644
--- a/synapse/http/matrixfederationclient.py
+++ b/synapse/http/matrixfederationclient.py
@@ -34,6 +34,7 @@ from typing import (
     Dict,
     Generic,
     List,
+    Literal,
     Optional,
     TextIO,
     Tuple,
@@ -48,7 +49,6 @@ import treq
 from canonicaljson import encode_canonical_json
 from prometheus_client import Counter
 from signedjson.sign import sign_json
-from typing_extensions import Literal
 
 from twisted.internet import defer
 from twisted.internet.error import DNSLookupError
diff --git a/synapse/http/proxyagent.py b/synapse/http/proxyagent.py
index f80f67acc6..fd16ee42dd 100644
--- a/synapse/http/proxyagent.py
+++ b/synapse/http/proxyagent.py
@@ -21,7 +21,7 @@
 import logging
 import random
 import re
-from typing import Any, Collection, Dict, List, Optional, Sequence, Tuple
+from typing import Any, Collection, Dict, List, Optional, Sequence, Tuple, Union
 from urllib.parse import urlparse
 from urllib.request import (  # type: ignore[attr-defined]
     getproxies_environment,
@@ -150,6 +150,12 @@ class ProxyAgent(_AgentBase):
             http_proxy = proxies["http"].encode() if "http" in proxies else None
             https_proxy = proxies["https"].encode() if "https" in proxies else None
             no_proxy = proxies["no"] if "no" in proxies else None
+            logger.debug(
+                "Using proxy settings: http_proxy=%s, https_proxy=%s, no_proxy=%s",
+                http_proxy,
+                https_proxy,
+                no_proxy,
+            )
 
         self.http_proxy_endpoint, self.http_proxy_creds = http_proxy_endpoint(
             http_proxy, self.proxy_reactor, contextFactory, **self._endpoint_kwargs
@@ -351,7 +357,9 @@ def http_proxy_endpoint(
     proxy: Optional[bytes],
     reactor: IReactorCore,
     tls_options_factory: Optional[IPolicyForHTTPS],
-    **kwargs: object,
+    timeout: float = 30,
+    bindAddress: Optional[Union[bytes, str, tuple[Union[bytes, str], int]]] = None,
+    attemptDelay: Optional[float] = None,
 ) -> Tuple[Optional[IStreamClientEndpoint], Optional[ProxyCredentials]]:
     """Parses an http proxy setting and returns an endpoint for the proxy
 
@@ -382,12 +390,15 @@ def http_proxy_endpoint(
     # 3.9+) on scheme-less proxies, e.g. host:port.
     scheme, host, port, credentials = parse_proxy(proxy)
 
-    proxy_endpoint = HostnameEndpoint(reactor, host, port, **kwargs)
+    proxy_endpoint = HostnameEndpoint(
+        reactor, host, port, timeout, bindAddress, attemptDelay
+    )
 
     if scheme == b"https":
         if tls_options_factory:
             tls_options = tls_options_factory.creatorForNetloc(host, port)
-            proxy_endpoint = wrapClientTLS(tls_options, proxy_endpoint)
+            wrapped_proxy_endpoint = wrapClientTLS(tls_options, proxy_endpoint)
+            return wrapped_proxy_endpoint, credentials
         else:
             raise RuntimeError(
                 f"No TLS options for a https connection via proxy {proxy!s}"
diff --git a/synapse/http/replicationagent.py b/synapse/http/replicationagent.py
index ee8c707062..4eabbc8af9 100644
--- a/synapse/http/replicationagent.py
+++ b/synapse/http/replicationagent.py
@@ -89,7 +89,7 @@ class ReplicationEndpointFactory:
                 location_config.port,
             )
             if scheme == "https":
-                endpoint = wrapClientTLS(
+                wrapped_endpoint = wrapClientTLS(
                     # The 'port' argument below isn't actually used by the function
                     self.context_factory.creatorForNetloc(
                         location_config.host.encode("utf-8"),
@@ -97,6 +97,8 @@ class ReplicationEndpointFactory:
                     ),
                     endpoint,
                 )
+                return wrapped_endpoint
+
             return endpoint
         elif isinstance(location_config, InstanceUnixLocationConfig):
             return UNIXClientEndpoint(self.reactor, location_config.path)
diff --git a/synapse/http/server.py b/synapse/http/server.py
index 792961a147..8bebafc18e 100644
--- a/synapse/http/server.py
+++ b/synapse/http/server.py
@@ -39,6 +39,7 @@ from typing import (
     List,
     Optional,
     Pattern,
+    Protocol,
     Tuple,
     Union,
 )
@@ -46,7 +47,6 @@ from typing import (
 import attr
 import jinja2
 from canonicaljson import encode_canonical_json
-from typing_extensions import Protocol
 from zope.interface import implementer
 
 from twisted.internet import defer, interfaces
diff --git a/synapse/http/servlet.py b/synapse/http/servlet.py
index 0330f1c878..ed6ab08336 100644
--- a/synapse/http/servlet.py
+++ b/synapse/http/servlet.py
@@ -28,6 +28,7 @@ from http import HTTPStatus
 from typing import (
     TYPE_CHECKING,
     List,
+    Literal,
     Mapping,
     Optional,
     Sequence,
@@ -37,8 +38,6 @@ from typing import (
     overload,
 )
 
-from typing_extensions import Literal
-
 from twisted.web.server import Request
 
 from synapse._pydantic_compat import (
diff --git a/synapse/logging/context.py b/synapse/logging/context.py
index 8a2dfeba13..3ef97f23c9 100644
--- a/synapse/logging/context.py
+++ b/synapse/logging/context.py
@@ -40,6 +40,7 @@ from typing import (
     Any,
     Awaitable,
     Callable,
+    Literal,
     Optional,
     Tuple,
     Type,
@@ -49,7 +50,7 @@ from typing import (
 )
 
 import attr
-from typing_extensions import Literal, ParamSpec
+from typing_extensions import ParamSpec
 
 from twisted.internet import defer, threads
 from twisted.python.threadpool import ThreadPool
diff --git a/synapse/logging/filter.py b/synapse/logging/filter.py
index 11c27c63f2..16de488dbc 100644
--- a/synapse/logging/filter.py
+++ b/synapse/logging/filter.py
@@ -19,8 +19,7 @@
 #
 #
 import logging
-
-from typing_extensions import Literal
+from typing import Literal
 
 
 class MetadataFilter(logging.Filter):
diff --git a/synapse/logging/scopecontextmanager.py b/synapse/logging/scopecontextmanager.py
index 581e6d6411..feaadc4d87 100644
--- a/synapse/logging/scopecontextmanager.py
+++ b/synapse/logging/scopecontextmanager.py
@@ -20,13 +20,10 @@
 #
 
 import logging
-from types import TracebackType
-from typing import Optional, Type
+from typing import Optional
 
 from opentracing import Scope, ScopeManager, Span
 
-import twisted
-
 from synapse.logging.context import (
     LoggingContext,
     current_context,
@@ -112,9 +109,6 @@ class _LogContextScope(Scope):
     """
     A custom opentracing scope, associated with a LogContext
 
-      * filters out _DefGen_Return exceptions which arise from calling
-        `defer.returnValue` in Twisted code
-
       * When the scope is closed, the logcontext's active scope is reset to None.
         and - if enter_logcontext was set - the logcontext is finished too.
     """
@@ -146,17 +140,6 @@ class _LogContextScope(Scope):
         self._finish_on_close = finish_on_close
         self._enter_logcontext = enter_logcontext
 
-    def __exit__(
-        self,
-        exc_type: Optional[Type[BaseException]],
-        value: Optional[BaseException],
-        traceback: Optional[TracebackType],
-    ) -> None:
-        if exc_type == twisted.internet.defer._DefGen_Return:
-            # filter out defer.returnValue() calls
-            exc_type = value = traceback = None
-        super().__exit__(exc_type, value, traceback)
-
     def __str__(self) -> str:
         return f"Scope<{self.span}>"
 
diff --git a/synapse/media/_base.py b/synapse/media/_base.py
index 7877df62fa..2e48d2fdc7 100644
--- a/synapse/media/_base.py
+++ b/synapse/media/_base.py
@@ -118,6 +118,9 @@ DEFAULT_MAX_TIMEOUT_MS = 20_000
 # Maximum allowed timeout_ms for download and thumbnail requests
 MAXIMUM_ALLOWED_MAX_TIMEOUT_MS = 60_000
 
+# The ETag header value to use for immutable media. This can be anything.
+_IMMUTABLE_ETAG = "1"
+
 
 def respond_404(request: SynapseRequest) -> None:
     assert request.path is not None
@@ -224,12 +227,7 @@ def add_file_headers(
 
     request.setHeader(b"Content-Disposition", disposition.encode("ascii"))
 
-    # cache for at least a day.
-    # XXX: we might want to turn this off for data we don't want to
-    # recommend caching as it's sensitive or private - or at least
-    # select private. don't bother setting Expires as all our
-    # clients are smart enough to be happy with Cache-Control
-    request.setHeader(b"Cache-Control", b"public,max-age=86400,s-maxage=86400")
+    _add_cache_headers(request)
 
     if file_size is not None:
         request.setHeader(b"Content-Length", b"%d" % (file_size,))
@@ -240,6 +238,26 @@ def add_file_headers(
     request.setHeader(b"X-Robots-Tag", "noindex, nofollow, noarchive, noimageindex")
 
 
+def _add_cache_headers(request: Request) -> None:
+    """Adds the appropriate cache headers to the response"""
+
+    # Cache on the client for at least a day.
+    #
+    # We set this to "public,s-maxage=0,proxy-revalidate" to allow CDNs to cache
+    # the media, so long as they "revalidate" the media on every request. By
+    # revalidate, we mean send the request to Synapse with a `If-None-Match`
+    # header, to which Synapse can either respond with a 304 if the user is
+    # authenticated/authorized, or a 401/403 if they're not.
+    request.setHeader(
+        b"Cache-Control", b"public,max-age=86400,s-maxage=0,proxy-revalidate"
+    )
+
+    # Set an ETag header to allow requesters to use it in requests to check if
+    # the cache is still valid. Since media is immutable (though may be
+    # deleted), we just set this to a constant.
+    request.setHeader(b"ETag", _IMMUTABLE_ETAG)
+
+
 # separators as defined in RFC2616. SP and HT are handled separately.
 # see _can_encode_filename_as_token.
 _FILENAME_SEPARATOR_CHARS = {
@@ -336,13 +354,15 @@ async def respond_with_multipart_responder(
 
         from synapse.media.media_storage import MultipartFileConsumer
 
+        _add_cache_headers(request)
+
         # note that currently the json_object is just {}, this will change when linked media
         # is implemented
         multipart_consumer = MultipartFileConsumer(
             clock,
             request,
             media_type,
-            {},
+            {},  # Note: if we change this we need to change the returned ETag.
             disposition,
             media_length,
         )
@@ -419,6 +439,46 @@ async def respond_with_responder(
     finish_request(request)
 
 
+def respond_with_304(request: SynapseRequest) -> None:
+    request.setResponseCode(304)
+
+    # could alternatively use request.notifyFinish() and flip a flag when
+    # the Deferred fires, but since the flag is RIGHT THERE it seems like
+    # a waste.
+    if request._disconnected:
+        logger.warning(
+            "Not sending response to request %s, already disconnected.", request
+        )
+        return None
+
+    _add_cache_headers(request)
+
+    request.finish()
+
+
+def check_for_cached_entry_and_respond(request: SynapseRequest) -> bool:
+    """Check if the request has a conditional header that allows us to return a
+    304 Not Modified response, and if it does, return a 304 response.
+
+    This handles clients and intermediary proxies caching media.
+    This method assumes that the user has already been
+    authorised to request the media.
+
+    Returns True if we have responded."""
+
+    # We've checked the user has access to the media, so we now check if it
+    # is a "conditional request" and we can just return a `304 Not Modified`
+    # response. Since media is immutable (though may be deleted), we just
+    # check this is the expected constant.
+    etag = request.getHeader("If-None-Match")
+    if etag == _IMMUTABLE_ETAG:
+        # Return a `304 Not modified`.
+        respond_with_304(request)
+        return True
+
+    return False
+
+
 class Responder(ABC):
     """Represents a response that can be streamed to the requester.
 
diff --git a/synapse/media/media_repository.py b/synapse/media/media_repository.py
index f4d25a7b8b..cf4cba722a 100644
--- a/synapse/media/media_repository.py
+++ b/synapse/media/media_repository.py
@@ -52,6 +52,7 @@ from synapse.media._base import (
     FileInfo,
     Responder,
     ThumbnailInfo,
+    check_for_cached_entry_and_respond,
     get_filename_from_headers,
     respond_404,
     respond_with_multipart_responder,
@@ -459,6 +460,11 @@ class MediaRepository:
 
         self.mark_recently_accessed(None, media_id)
 
+        # Once we've checked auth we can return early if the media is cached on
+        # the client
+        if check_for_cached_entry_and_respond(request):
+            return
+
         media_type = media_info.media_type
         if not media_type:
             media_type = "application/octet-stream"
@@ -538,6 +544,17 @@ class MediaRepository:
                 allow_authenticated,
             )
 
+        # Check if the media is cached on the client, if so return 304. We need
+        # to do this after we have fetched remote media, as we need it to do the
+        # auth.
+        if check_for_cached_entry_and_respond(request):
+            # We always need to use the responder.
+            if responder:
+                with responder:
+                    pass
+
+            return
+
         # We deliberately stream the file outside the lock
         if responder and media_info:
             upload_name = name if name else media_info.upload_name
diff --git a/synapse/media/thumbnailer.py b/synapse/media/thumbnailer.py
index d6b8ce4a09..5d9afda322 100644
--- a/synapse/media/thumbnailer.py
+++ b/synapse/media/thumbnailer.py
@@ -34,6 +34,7 @@ from synapse.logging.opentracing import trace
 from synapse.media._base import (
     FileInfo,
     ThumbnailInfo,
+    check_for_cached_entry_and_respond,
     respond_404,
     respond_with_file,
     respond_with_multipart_responder,
@@ -294,6 +295,11 @@ class ThumbnailProvider:
             if media_info.authenticated:
                 raise NotFoundError()
 
+        # Once we've checked auth we can return early if the media is cached on
+        # the client
+        if check_for_cached_entry_and_respond(request):
+            return
+
         thumbnail_infos = await self.store.get_local_media_thumbnails(media_id)
         await self._select_and_respond_with_thumbnail(
             request,
@@ -334,6 +340,11 @@ class ThumbnailProvider:
             if media_info.authenticated:
                 raise NotFoundError()
 
+        # Once we've checked auth we can return early if the media is cached on
+        # the client
+        if check_for_cached_entry_and_respond(request):
+            return
+
         thumbnail_infos = await self.store.get_local_media_thumbnails(media_id)
         for info in thumbnail_infos:
             t_w = info.width == desired_width
@@ -431,6 +442,10 @@ class ThumbnailProvider:
                 respond_404(request)
                 return
 
+        # Check if the media is cached on the client, if so return 304.
+        if check_for_cached_entry_and_respond(request):
+            return
+
         thumbnail_infos = await self.store.get_remote_media_thumbnails(
             server_name, media_id
         )
@@ -510,6 +525,10 @@ class ThumbnailProvider:
             if media_info.authenticated:
                 raise NotFoundError()
 
+        # Check if the media is cached on the client, if so return 304.
+        if check_for_cached_entry_and_respond(request):
+            return
+
         thumbnail_infos = await self.store.get_remote_media_thumbnails(
             server_name, media_id
         )
diff --git a/synapse/metrics/jemalloc.py b/synapse/metrics/jemalloc.py
index bd25985686..321ff58083 100644
--- a/synapse/metrics/jemalloc.py
+++ b/synapse/metrics/jemalloc.py
@@ -23,11 +23,10 @@ import ctypes
 import logging
 import os
 import re
-from typing import Iterable, Optional, overload
+from typing import Iterable, Literal, Optional, overload
 
 import attr
 from prometheus_client import REGISTRY, Metric
-from typing_extensions import Literal
 
 from synapse.metrics import GaugeMetricFamily
 from synapse.metrics._types import Collector
diff --git a/synapse/module_api/__init__.py b/synapse/module_api/__init__.py
index f6bfd93d3c..bf9532e891 100644
--- a/synapse/module_api/__init__.py
+++ b/synapse/module_api/__init__.py
@@ -45,6 +45,7 @@ from twisted.internet.interfaces import IDelayedCall
 from twisted.web.resource import Resource
 
 from synapse.api import errors
+from synapse.api.constants import ProfileFields
 from synapse.api.errors import SynapseError
 from synapse.api.presence import UserPresenceState
 from synapse.config import ConfigError
@@ -1086,7 +1087,10 @@ class ModuleApi:
             content = {}
 
         # Set the profile if not already done by the module.
-        if "avatar_url" not in content or "displayname" not in content:
+        if (
+            ProfileFields.AVATAR_URL not in content
+            or ProfileFields.DISPLAYNAME not in content
+        ):
             try:
                 # Try to fetch the user's profile.
                 profile = await self._hs.get_profile_handler().get_profile(
@@ -1095,8 +1099,8 @@ class ModuleApi:
             except SynapseError as e:
                 # If the profile couldn't be found, use default values.
                 profile = {
-                    "displayname": target_user_id.localpart,
-                    "avatar_url": None,
+                    ProfileFields.DISPLAYNAME: target_user_id.localpart,
+                    ProfileFields.AVATAR_URL: None,
                 }
 
                 if e.code != 404:
@@ -1109,11 +1113,9 @@ class ModuleApi:
                     )
 
             # Set the profile where it needs to be set.
-            if "avatar_url" not in content:
-                content["avatar_url"] = profile["avatar_url"]
-
-            if "displayname" not in content:
-                content["displayname"] = profile["displayname"]
+            for field_name in [ProfileFields.AVATAR_URL, ProfileFields.DISPLAYNAME]:
+                if field_name not in content and field_name in profile:
+                    content[field_name] = profile[field_name]
 
         event_id, _ = await self._hs.get_room_member_handler().update_membership(
             requester=requester,
@@ -1844,6 +1846,10 @@ class ModuleApi:
             deactivation=deactivation,
         )
 
+    def get_current_time_msec(self) -> int:
+        """Returns the current server time in milliseconds."""
+        return self._clock.time_msec()
+
 
 class PublicRoomListManager:
     """Contains methods for adding to, removing from and querying whether a room
diff --git a/synapse/module_api/callbacks/spamchecker_callbacks.py b/synapse/module_api/callbacks/spamchecker_callbacks.py
index 17079ff781..a86b46ba54 100644
--- a/synapse/module_api/callbacks/spamchecker_callbacks.py
+++ b/synapse/module_api/callbacks/spamchecker_callbacks.py
@@ -19,6 +19,7 @@
 #
 #
 
+import functools
 import inspect
 import logging
 from typing import (
@@ -28,14 +29,13 @@ from typing import (
     Callable,
     Collection,
     List,
+    Literal,
     Optional,
     Tuple,
     Union,
+    cast,
 )
 
-# `Literal` appears with Python 3.8.
-from typing_extensions import Literal
-
 import synapse
 from synapse.api.errors import Codes
 from synapse.logging.opentracing import trace
@@ -168,7 +168,10 @@ USER_MAY_PUBLISH_ROOM_CALLBACK = Callable[
         ]
     ],
 ]
-CHECK_USERNAME_FOR_SPAM_CALLBACK = Callable[[UserProfile], Awaitable[bool]]
+CHECK_USERNAME_FOR_SPAM_CALLBACK = Union[
+    Callable[[UserProfile], Awaitable[bool]],
+    Callable[[UserProfile, str], Awaitable[bool]],
+]
 LEGACY_CHECK_REGISTRATION_FOR_SPAM_CALLBACK = Callable[
     [
         Optional[dict],
@@ -293,6 +296,7 @@ def load_legacy_spam_checkers(hs: "synapse.server.HomeServer") -> None:
                         "Bad signature for callback check_registration_for_spam",
                     )
 
+            @functools.wraps(wrapped_func)
             def run(*args: Any, **kwargs: Any) -> Awaitable:
                 # Assertion required because mypy can't prove we won't change `f`
                 # back to `None`. See
@@ -716,7 +720,9 @@ class SpamCheckerModuleApiCallbacks:
 
         return self.NOT_SPAM
 
-    async def check_username_for_spam(self, user_profile: UserProfile) -> bool:
+    async def check_username_for_spam(
+        self, user_profile: UserProfile, requester_id: str
+    ) -> bool:
         """Checks if a user ID or display name are considered "spammy" by this server.
 
         If the server considers a username spammy, then it will not be included in
@@ -727,15 +733,33 @@ class SpamCheckerModuleApiCallbacks:
                 * user_id
                 * display_name
                 * avatar_url
+            requester_id: The user ID of the user making the user directory search request.
 
         Returns:
             True if the user is spammy.
         """
         for callback in self._check_username_for_spam_callbacks:
             with Measure(self.clock, f"{callback.__module__}.{callback.__qualname__}"):
+                checker_args = inspect.signature(callback)
                 # Make a copy of the user profile object to ensure the spam checker cannot
                 # modify it.
-                res = await delay_cancellation(callback(user_profile.copy()))
+                # Also ensure backwards compatibility with spam checker callbacks
+                # that don't expect the requester_id argument.
+                if len(checker_args.parameters) == 2:
+                    callback_with_requester_id = cast(
+                        Callable[[UserProfile, str], Awaitable[bool]], callback
+                    )
+                    res = await delay_cancellation(
+                        callback_with_requester_id(user_profile.copy(), requester_id)
+                    )
+                else:
+                    callback_without_requester_id = cast(
+                        Callable[[UserProfile], Awaitable[bool]], callback
+                    )
+                    res = await delay_cancellation(
+                        callback_without_requester_id(user_profile.copy())
+                    )
+
             if res:
                 return True
 
diff --git a/synapse/push/bulk_push_rule_evaluator.py b/synapse/push/bulk_push_rule_evaluator.py
index 9c0592a902..8c106f9649 100644
--- a/synapse/push/bulk_push_rule_evaluator.py
+++ b/synapse/push/bulk_push_rule_evaluator.py
@@ -371,7 +371,7 @@ class BulkPushRuleEvaluator:
                 "Deferred[Tuple[int, Tuple[dict, Optional[int]], Dict[str, Dict[str, JsonValue]], Mapping[str, ProfileInfo]]]",
                 gather_results(
                     (
-                        run_in_background(  # type: ignore[call-arg]
+                        run_in_background(  # type: ignore[call-overload]
                             self.store.get_number_joined_users_in_room,
                             event.room_id,  # type: ignore[arg-type]
                         ),
@@ -382,10 +382,10 @@ class BulkPushRuleEvaluator:
                             event_id_to_event,
                         ),
                         run_in_background(self._related_events, event),
-                        run_in_background(  # type: ignore[call-arg]
+                        run_in_background(  # type: ignore[call-overload]
                             self.store.get_subset_users_in_room_with_profiles,
-                            event.room_id,  # type: ignore[arg-type]
-                            rules_by_user.keys(),  # type: ignore[arg-type]
+                            event.room_id,
+                            rules_by_user.keys(),
                         ),
                     ),
                     consumeErrors=True,
diff --git a/synapse/push/httppusher.py b/synapse/push/httppusher.py
index dd9b64d6ef..69790ecab5 100644
--- a/synapse/push/httppusher.py
+++ b/synapse/push/httppusher.py
@@ -127,6 +127,11 @@ class HttpPusher(Pusher):
         if self.data is None:
             raise PusherConfigException("'data' key can not be null for HTTP pusher")
 
+        # Check if badge counts should be disabled for this push gateway
+        self.disable_badge_count = self.hs.config.experimental.msc4076_enabled and bool(
+            self.data.get("org.matrix.msc4076.disable_badge_count", False)
+        )
+
         self.name = "%s/%s/%s" % (
             pusher_config.user_name,
             pusher_config.app_id,
@@ -461,9 +466,10 @@ class HttpPusher(Pusher):
             content: JsonDict = {
                 "event_id": event.event_id,
                 "room_id": event.room_id,
-                "counts": {"unread": badge},
                 "prio": priority,
             }
+            if not self.disable_badge_count:
+                content["counts"] = {"unread": badge}
             # event_id_only doesn't include the tweaks, so override them.
             tweaks = {}
         else:
@@ -478,11 +484,11 @@ class HttpPusher(Pusher):
                 "type": event.type,
                 "sender": event.user_id,
                 "prio": priority,
-                "counts": {
-                    "unread": badge,
-                    # 'missed_calls': 2
-                },
             }
+            if not self.disable_badge_count:
+                content["counts"] = {
+                    "unread": badge,
+                }
             if event.type == "m.room.member" and event.is_state():
                 content["membership"] = event.content["membership"]
                 content["user_is_target"] = event.state_key == self.user_id
diff --git a/synapse/push/push_types.py b/synapse/push/push_types.py
index 201ec97219..57fa926a46 100644
--- a/synapse/push/push_types.py
+++ b/synapse/push/push_types.py
@@ -18,9 +18,7 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
-from typing import List, Optional
-
-from typing_extensions import TypedDict
+from typing import List, Optional, TypedDict
 
 
 class EmailReason(TypedDict, total=False):
diff --git a/synapse/replication/tcp/commands.py b/synapse/replication/tcp/commands.py
index 7d51441e91..6ab5356660 100644
--- a/synapse/replication/tcp/commands.py
+++ b/synapse/replication/tcp/commands.py
@@ -495,7 +495,7 @@ class LockReleasedCommand(Command):
 
 
 class NewActiveTaskCommand(_SimpleCommand):
-    """Sent to inform instance handling background tasks that a new active task is available to run.
+    """Sent to inform instance handling background tasks that a new task is ready to run.
 
     Format::
 
diff --git a/synapse/replication/tcp/handler.py b/synapse/replication/tcp/handler.py
index 6101226938..1fafbb48c3 100644
--- a/synapse/replication/tcp/handler.py
+++ b/synapse/replication/tcp/handler.py
@@ -727,7 +727,7 @@ class ReplicationCommandHandler:
     ) -> None:
         """Called when get a new NEW_ACTIVE_TASK command."""
         if self._task_scheduler:
-            self._task_scheduler.launch_task_by_id(cmd.data)
+            self._task_scheduler.on_new_task(cmd.data)
 
     def new_connection(self, connection: IReplicationConnection) -> None:
         """Called when we have a new connection."""
diff --git a/synapse/rest/__init__.py b/synapse/rest/__init__.py
index 4e594e6595..2f1ef84e26 100644
--- a/synapse/rest/__init__.py
+++ b/synapse/rest/__init__.py
@@ -29,7 +29,7 @@ from synapse.rest.client import (
     account_validity,
     appservice_ping,
     auth,
-    auth_issuer,
+    auth_metadata,
     capabilities,
     delayed_events,
     devices,
@@ -121,7 +121,7 @@ CLIENT_SERVLET_FUNCTIONS: Tuple[RegisterServletsFunc, ...] = (
     mutual_rooms.register_servlets,
     login_token_request.register_servlets,
     rendezvous.register_servlets,
-    auth_issuer.register_servlets,
+    auth_metadata.register_servlets,
 )
 
 SERVLET_GROUPS: Dict[str, Iterable[RegisterServletsFunc]] = {
@@ -187,7 +187,7 @@ class ClientRestResource(JsonResource):
                     mutual_rooms.register_servlets,
                     login_token_request.register_servlets,
                     rendezvous.register_servlets,
-                    auth_issuer.register_servlets,
+                    auth_metadata.register_servlets,
                 ]:
                     continue
 
diff --git a/synapse/rest/admin/__init__.py b/synapse/rest/admin/__init__.py
index 4db8975674..f3c99663e8 100644
--- a/synapse/rest/admin/__init__.py
+++ b/synapse/rest/admin/__init__.py
@@ -107,6 +107,8 @@ from synapse.rest.admin.users import (
     UserAdminServlet,
     UserByExternalId,
     UserByThreePid,
+    UserInvitesCount,
+    UserJoinedRoomCount,
     UserMembershipRestServlet,
     UserRegisterServlet,
     UserReplaceMasterCrossSigningKeyRestServlet,
@@ -323,6 +325,8 @@ def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
     UserByThreePid(hs).register(http_server)
     RedactUser(hs).register(http_server)
     RedactUserStatus(hs).register(http_server)
+    UserInvitesCount(hs).register(http_server)
+    UserJoinedRoomCount(hs).register(http_server)
 
     DeviceRestServlet(hs).register(http_server)
     DevicesRestServlet(hs).register(http_server)
@@ -332,8 +336,7 @@ def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
     BackgroundUpdateRestServlet(hs).register(http_server)
     BackgroundUpdateStartJobRestServlet(hs).register(http_server)
     ExperimentalFeaturesRestServlet(hs).register(http_server)
-    if hs.config.experimental.msc3823_account_suspension:
-        SuspendAccountRestServlet(hs).register(http_server)
+    SuspendAccountRestServlet(hs).register(http_server)
 
 
 def register_servlets_for_client_rest_resource(
diff --git a/synapse/rest/admin/event_reports.py b/synapse/rest/admin/event_reports.py
index 9fb68bfa46..ff1abc0697 100644
--- a/synapse/rest/admin/event_reports.py
+++ b/synapse/rest/admin/event_reports.py
@@ -50,8 +50,10 @@ class EventReportsRestServlet(RestServlet):
         The parameters `from` and `limit` are required only for pagination.
         By default, a `limit` of 100 is used.
         The parameter `dir` can be used to define the order of results.
-        The parameter `user_id` can be used to filter by user id.
-        The parameter `room_id` can be used to filter by room id.
+        The `user_id` query parameter filters by the user ID of the reporter of the event.
+        The `room_id` query parameter filters by room id.
+        The `event_sender_user_id` query parameter can be used to filter by the user id
+        of the sender of the reported event.
     Returns:
         A list of reported events and an integer representing the total number of
         reported events that exist given this query
@@ -71,6 +73,7 @@ class EventReportsRestServlet(RestServlet):
         direction = parse_enum(request, "dir", Direction, Direction.BACKWARDS)
         user_id = parse_string(request, "user_id")
         room_id = parse_string(request, "room_id")
+        event_sender_user_id = parse_string(request, "event_sender_user_id")
 
         if start < 0:
             raise SynapseError(
@@ -87,7 +90,7 @@ class EventReportsRestServlet(RestServlet):
             )
 
         event_reports, total = await self._store.get_event_reports_paginate(
-            start, limit, direction, user_id, room_id
+            start, limit, direction, user_id, room_id, event_sender_user_id
         )
         ret = {"event_reports": event_reports, "total": total}
         if (start + limit) < total:
diff --git a/synapse/rest/admin/rooms.py b/synapse/rest/admin/rooms.py
index 01f9de9ffa..3097cb1a9d 100644
--- a/synapse/rest/admin/rooms.py
+++ b/synapse/rest/admin/rooms.py
@@ -23,6 +23,7 @@ from http import HTTPStatus
 from typing import TYPE_CHECKING, List, Optional, Tuple, cast
 
 import attr
+from immutabledict import immutabledict
 
 from synapse.api.constants import Direction, EventTypes, JoinRules, Membership
 from synapse.api.errors import AuthError, Codes, NotFoundError, SynapseError
@@ -463,7 +464,18 @@ class RoomStateRestServlet(RestServlet):
         if not room:
             raise NotFoundError("Room not found")
 
-        event_ids = await self._storage_controllers.state.get_current_state_ids(room_id)
+        state_filter = None
+        type = parse_string(request, "type")
+
+        if type:
+            state_filter = StateFilter(
+                types=immutabledict({type: None}),
+                include_others=False,
+            )
+
+        event_ids = await self._storage_controllers.state.get_current_state_ids(
+            room_id, state_filter
+        )
         events = await self.store.get_events(event_ids.values())
         now = self.clock.time_msec()
         room_state = await self._event_serializer.serialize_events(events.values(), now)
diff --git a/synapse/rest/admin/users.py b/synapse/rest/admin/users.py
index b146c2754d..7b8f1d1b2a 100644
--- a/synapse/rest/admin/users.py
+++ b/synapse/rest/admin/users.py
@@ -983,7 +983,7 @@ class UserAdminServlet(RestServlet):
 
 class UserMembershipRestServlet(RestServlet):
     """
-    Get room list of an user.
+    Get list of joined room ID's for a user.
     """
 
     PATTERNS = admin_patterns("/users/(?P<user_id>[^/]*)/joined_rooms$")
@@ -999,8 +999,9 @@ class UserMembershipRestServlet(RestServlet):
         await assert_requester_is_admin(self.auth, request)
 
         room_ids = await self.store.get_rooms_for_user(user_id)
-        ret = {"joined_rooms": list(room_ids), "total": len(room_ids)}
-        return HTTPStatus.OK, ret
+        rooms_response = {"joined_rooms": list(room_ids), "total": len(room_ids)}
+
+        return HTTPStatus.OK, rooms_response
 
 
 class PushersRestServlet(RestServlet):
@@ -1501,3 +1502,50 @@ class RedactUserStatus(RestServlet):
                 }
         else:
             raise NotFoundError("redact id '%s' not found" % redact_id)
+
+
+class UserInvitesCount(RestServlet):
+    """
+    Return the count of invites that the user has sent after the given timestamp
+    """
+
+    PATTERNS = admin_patterns("/users/(?P<user_id>[^/]*)/sent_invite_count")
+
+    def __init__(self, hs: "HomeServer"):
+        self._auth = hs.get_auth()
+        self.store = hs.get_datastores().main
+
+    async def on_GET(
+        self, request: SynapseRequest, user_id: str
+    ) -> Tuple[int, JsonDict]:
+        await assert_requester_is_admin(self._auth, request)
+        from_ts = parse_integer(request, "from_ts", required=True)
+
+        sent_invite_count = await self.store.get_sent_invite_count_by_user(
+            user_id, from_ts
+        )
+
+        return HTTPStatus.OK, {"invite_count": sent_invite_count}
+
+
+class UserJoinedRoomCount(RestServlet):
+    """
+    Return the count of rooms that the user has joined at or after the given timestamp, even
+    if they have subsequently left/been banned from those rooms.
+    """
+
+    PATTERNS = admin_patterns("/users/(?P<user_id>[^/]*)/cumulative_joined_room_count")
+
+    def __init__(self, hs: "HomeServer"):
+        self._auth = hs.get_auth()
+        self.store = hs.get_datastores().main
+
+    async def on_GET(
+        self, request: SynapseRequest, user_id: str
+    ) -> Tuple[int, JsonDict]:
+        await assert_requester_is_admin(self._auth, request)
+        from_ts = parse_integer(request, "from_ts", required=True)
+
+        joined_rooms = await self.store.get_rooms_for_user_by_date(user_id, from_ts)
+
+        return HTTPStatus.OK, {"cumulative_joined_room_count": len(joined_rooms)}
diff --git a/synapse/rest/client/account.py b/synapse/rest/client/account.py
index 32fa7b4ec4..59dbad3582 100644
--- a/synapse/rest/client/account.py
+++ b/synapse/rest/client/account.py
@@ -21,11 +21,10 @@
 #
 import logging
 import random
-from typing import TYPE_CHECKING, List, Optional, Tuple
+from typing import TYPE_CHECKING, List, Literal, Optional, Tuple
 from urllib.parse import urlparse
 
 import attr
-from typing_extensions import Literal
 
 from twisted.web.server import Request
 
diff --git a/synapse/rest/client/auth_issuer.py b/synapse/rest/client/auth_metadata.py
similarity index 64%
rename from synapse/rest/client/auth_issuer.py
rename to synapse/rest/client/auth_metadata.py
index acd0399d85..5444a89be6 100644
--- a/synapse/rest/client/auth_issuer.py
+++ b/synapse/rest/client/auth_metadata.py
@@ -32,6 +32,8 @@ logger = logging.getLogger(__name__)
 class AuthIssuerServlet(RestServlet):
     """
     Advertises what OpenID Connect issuer clients should use to authorise users.
+    This endpoint was defined in a previous iteration of MSC2965, and is still
+    used by some clients.
     """
 
     PATTERNS = client_patterns(
@@ -63,7 +65,42 @@ class AuthIssuerServlet(RestServlet):
             )
 
 
+class AuthMetadataServlet(RestServlet):
+    """
+    Advertises the OAuth 2.0 server metadata for the homeserver.
+    """
+
+    PATTERNS = client_patterns(
+        "/org.matrix.msc2965/auth_metadata$",
+        unstable=True,
+        releases=(),
+    )
+
+    def __init__(self, hs: "HomeServer"):
+        super().__init__()
+        self._config = hs.config
+        self._auth = hs.get_auth()
+
+    async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
+        if self._config.experimental.msc3861.enabled:
+            # If MSC3861 is enabled, we can assume self._auth is an instance of MSC3861DelegatedAuth
+            # We import lazily here because of the authlib requirement
+            from synapse.api.auth.msc3861_delegated import MSC3861DelegatedAuth
+
+            auth = cast(MSC3861DelegatedAuth, self._auth)
+            return 200, await auth.auth_metadata()
+        else:
+            # Wouldn't expect this to be reached: the servlet shouldn't have been
+            # registered. Still, fail gracefully if we are registered for some reason.
+            raise SynapseError(
+                404,
+                "OIDC discovery has not been configured on this homeserver",
+                Codes.NOT_FOUND,
+            )
+
+
 def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
     # We use the MSC3861 values as they are used by multiple MSCs
     if hs.config.experimental.msc3861.enabled:
         AuthIssuerServlet(hs).register(http_server)
+        AuthMetadataServlet(hs).register(http_server)
diff --git a/synapse/rest/client/capabilities.py b/synapse/rest/client/capabilities.py
index 63b8a9364a..ebd5a33ea5 100644
--- a/synapse/rest/client/capabilities.py
+++ b/synapse/rest/client/capabilities.py
@@ -92,6 +92,23 @@ class CapabilitiesRestServlet(RestServlet):
                 "enabled": self.config.experimental.msc3664_enabled,
             }
 
+        if self.config.experimental.msc4133_enabled:
+            response["capabilities"]["uk.tcpip.msc4133.profile_fields"] = {
+                "enabled": True,
+            }
+
+            # Ensure this is consistent with the legacy m.set_displayname and
+            # m.set_avatar_url.
+            disallowed = []
+            if not self.config.registration.enable_set_displayname:
+                disallowed.append("displayname")
+            if not self.config.registration.enable_set_avatar_url:
+                disallowed.append("avatar_url")
+            if disallowed:
+                response["capabilities"]["uk.tcpip.msc4133.profile_fields"][
+                    "disallowed"
+                ] = disallowed
+
         return HTTPStatus.OK, response
 
 
diff --git a/synapse/rest/client/devices.py b/synapse/rest/client/devices.py
index 6a45a5d130..4607b23494 100644
--- a/synapse/rest/client/devices.py
+++ b/synapse/rest/client/devices.py
@@ -114,15 +114,19 @@ class DeleteDevicesRestServlet(RestServlet):
             else:
                 raise e
 
-        await self.auth_handler.validate_user_via_ui_auth(
-            requester,
-            request,
-            body.dict(exclude_unset=True),
-            "remove device(s) from your account",
-            # Users might call this multiple times in a row while cleaning up
-            # devices, allow a single UI auth session to be re-used.
-            can_skip_ui_auth=True,
-        )
+        if requester.app_service and requester.app_service.msc4190_device_management:
+            # MSC4190 can skip UIA for this endpoint
+            pass
+        else:
+            await self.auth_handler.validate_user_via_ui_auth(
+                requester,
+                request,
+                body.dict(exclude_unset=True),
+                "remove device(s) from your account",
+                # Users might call this multiple times in a row while cleaning up
+                # devices, allow a single UI auth session to be re-used.
+                can_skip_ui_auth=True,
+            )
 
         await self.device_handler.delete_devices(
             requester.user.to_string(), body.devices
@@ -175,9 +179,6 @@ class DeviceRestServlet(RestServlet):
     async def on_DELETE(
         self, request: SynapseRequest, device_id: str
     ) -> Tuple[int, JsonDict]:
-        if self._msc3861_oauth_delegation_enabled:
-            raise UnrecognizedRequestError(code=404)
-
         requester = await self.auth.get_user_by_req(request)
 
         try:
@@ -192,15 +193,24 @@ class DeviceRestServlet(RestServlet):
             else:
                 raise
 
-        await self.auth_handler.validate_user_via_ui_auth(
-            requester,
-            request,
-            body.dict(exclude_unset=True),
-            "remove a device from your account",
-            # Users might call this multiple times in a row while cleaning up
-            # devices, allow a single UI auth session to be re-used.
-            can_skip_ui_auth=True,
-        )
+        if requester.app_service and requester.app_service.msc4190_device_management:
+            # MSC4190 allows appservices to delete devices through this endpoint without UIA
+            # It's also allowed with MSC3861 enabled
+            pass
+
+        else:
+            if self._msc3861_oauth_delegation_enabled:
+                raise UnrecognizedRequestError(code=404)
+
+            await self.auth_handler.validate_user_via_ui_auth(
+                requester,
+                request,
+                body.dict(exclude_unset=True),
+                "remove a device from your account",
+                # Users might call this multiple times in a row while cleaning up
+                # devices, allow a single UI auth session to be re-used.
+                can_skip_ui_auth=True,
+            )
 
         await self.device_handler.delete_devices(
             requester.user.to_string(), [device_id]
@@ -216,6 +226,16 @@ class DeviceRestServlet(RestServlet):
         requester = await self.auth.get_user_by_req(request, allow_guest=True)
 
         body = parse_and_validate_json_object_from_request(request, self.PutBody)
+
+        # MSC4190 allows appservices to create devices through this endpoint
+        if requester.app_service and requester.app_service.msc4190_device_management:
+            created = await self.device_handler.upsert_device(
+                user_id=requester.user.to_string(),
+                device_id=device_id,
+                display_name=body.display_name,
+            )
+            return 201 if created else 200, {}
+
         await self.device_handler.update_device(
             requester.user.to_string(), device_id, body.dict()
         )
diff --git a/synapse/rest/client/directory.py b/synapse/rest/client/directory.py
index 98ba5c4c2a..479f489623 100644
--- a/synapse/rest/client/directory.py
+++ b/synapse/rest/client/directory.py
@@ -20,9 +20,7 @@
 #
 
 import logging
-from typing import TYPE_CHECKING, List, Optional, Tuple
-
-from typing_extensions import Literal
+from typing import TYPE_CHECKING, List, Literal, Optional, Tuple
 
 from twisted.web.server import Request
 
diff --git a/synapse/rest/client/login.py b/synapse/rest/client/login.py
index 3271b02d40..72b219447b 100644
--- a/synapse/rest/client/login.py
+++ b/synapse/rest/client/login.py
@@ -30,11 +30,10 @@ from typing import (
     List,
     Optional,
     Tuple,
+    TypedDict,
     Union,
 )
 
-from typing_extensions import TypedDict
-
 from synapse.api.constants import ApprovalNoticeMedium
 from synapse.api.errors import (
     Codes,
diff --git a/synapse/rest/client/presence.py b/synapse/rest/client/presence.py
index ecc52956e4..104d54cd89 100644
--- a/synapse/rest/client/presence.py
+++ b/synapse/rest/client/presence.py
@@ -24,7 +24,8 @@
 import logging
 from typing import TYPE_CHECKING, Tuple
 
-from synapse.api.errors import AuthError, SynapseError
+from synapse.api.errors import AuthError, Codes, LimitExceededError, SynapseError
+from synapse.api.ratelimiting import Ratelimiter
 from synapse.handlers.presence import format_user_presence_state
 from synapse.http.server import HttpServer
 from synapse.http.servlet import RestServlet, parse_json_object_from_request
@@ -48,6 +49,14 @@ class PresenceStatusRestServlet(RestServlet):
         self.presence_handler = hs.get_presence_handler()
         self.clock = hs.get_clock()
         self.auth = hs.get_auth()
+        self.store = hs.get_datastores().main
+
+        # Ratelimiter for presence updates, keyed by requester.
+        self._presence_per_user_limiter = Ratelimiter(
+            store=self.store,
+            clock=self.clock,
+            cfg=hs.config.ratelimiting.rc_presence_per_user,
+        )
 
     async def on_GET(
         self, request: SynapseRequest, user_id: str
@@ -82,6 +91,17 @@ class PresenceStatusRestServlet(RestServlet):
         if requester.user != user:
             raise AuthError(403, "Can only set your own presence state")
 
+        # ignore the presence update if the ratelimit is exceeded
+        try:
+            await self._presence_per_user_limiter.ratelimit(requester)
+        except LimitExceededError as e:
+            logger.debug("User presence ratelimit exceeded; ignoring it.")
+            return 429, {
+                "errcode": Codes.LIMIT_EXCEEDED,
+                "error": "Too many requests",
+                "retry_after_ms": e.retry_after_ms,
+            }
+
         state = {}
 
         content = parse_json_object_from_request(request)
diff --git a/synapse/rest/client/profile.py b/synapse/rest/client/profile.py
index 7a95b9445d..8326d8017c 100644
--- a/synapse/rest/client/profile.py
+++ b/synapse/rest/client/profile.py
@@ -21,10 +21,13 @@
 
 """This module contains REST servlets to do with profile: /profile/<paths>"""
 
+import re
 from http import HTTPStatus
 from typing import TYPE_CHECKING, Tuple
 
+from synapse.api.constants import ProfileFields
 from synapse.api.errors import Codes, SynapseError
+from synapse.handlers.profile import MAX_CUSTOM_FIELD_LEN
 from synapse.http.server import HttpServer
 from synapse.http.servlet import (
     RestServlet,
@@ -33,7 +36,8 @@ from synapse.http.servlet import (
 )
 from synapse.http.site import SynapseRequest
 from synapse.rest.client._base import client_patterns
-from synapse.types import JsonDict, UserID
+from synapse.types import JsonDict, JsonValue, UserID
+from synapse.util.stringutils import is_namedspaced_grammar
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
@@ -91,6 +95,11 @@ class ProfileDisplaynameRestServlet(RestServlet):
     async def on_PUT(
         self, request: SynapseRequest, user_id: str
     ) -> Tuple[int, JsonDict]:
+        if not UserID.is_valid(user_id):
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST, "Invalid user id", Codes.INVALID_PARAM
+            )
+
         requester = await self.auth.get_user_by_req(request, allow_guest=True)
         user = UserID.from_string(user_id)
         is_admin = await self.auth.is_server_admin(requester)
@@ -101,9 +110,7 @@ class ProfileDisplaynameRestServlet(RestServlet):
             new_name = content["displayname"]
         except Exception:
             raise SynapseError(
-                code=400,
-                msg="Unable to parse name",
-                errcode=Codes.BAD_JSON,
+                400, "Missing key 'displayname'", errcode=Codes.MISSING_PARAM
             )
 
         propagate = _read_propagate(self.hs, request)
@@ -166,6 +173,11 @@ class ProfileAvatarURLRestServlet(RestServlet):
     async def on_PUT(
         self, request: SynapseRequest, user_id: str
     ) -> Tuple[int, JsonDict]:
+        if not UserID.is_valid(user_id):
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST, "Invalid user id", Codes.INVALID_PARAM
+            )
+
         requester = await self.auth.get_user_by_req(request)
         user = UserID.from_string(user_id)
         is_admin = await self.auth.is_server_admin(requester)
@@ -227,19 +239,185 @@ class ProfileRestServlet(RestServlet):
         user = UserID.from_string(user_id)
         await self.profile_handler.check_profile_query_allowed(user, requester_user)
 
-        displayname = await self.profile_handler.get_displayname(user)
-        avatar_url = await self.profile_handler.get_avatar_url(user)
-
-        ret = {}
-        if displayname is not None:
-            ret["displayname"] = displayname
-        if avatar_url is not None:
-            ret["avatar_url"] = avatar_url
+        ret = await self.profile_handler.get_profile(user_id)
 
         return 200, ret
 
 
+class UnstableProfileFieldRestServlet(RestServlet):
+    PATTERNS = [
+        re.compile(
+            r"^/_matrix/client/unstable/uk\.tcpip\.msc4133/profile/(?P<user_id>[^/]*)/(?P<field_name>[^/]*)"
+        )
+    ]
+    CATEGORY = "Event sending requests"
+
+    def __init__(self, hs: "HomeServer"):
+        super().__init__()
+        self.hs = hs
+        self.profile_handler = hs.get_profile_handler()
+        self.auth = hs.get_auth()
+
+    async def on_GET(
+        self, request: SynapseRequest, user_id: str, field_name: str
+    ) -> Tuple[int, JsonDict]:
+        requester_user = None
+
+        if self.hs.config.server.require_auth_for_profile_requests:
+            requester = await self.auth.get_user_by_req(request)
+            requester_user = requester.user
+
+        if not UserID.is_valid(user_id):
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST, "Invalid user id", Codes.INVALID_PARAM
+            )
+
+        if not field_name:
+            raise SynapseError(400, "Field name too short", errcode=Codes.INVALID_PARAM)
+
+        if len(field_name.encode("utf-8")) > MAX_CUSTOM_FIELD_LEN:
+            raise SynapseError(400, "Field name too long", errcode=Codes.KEY_TOO_LARGE)
+        if not is_namedspaced_grammar(field_name):
+            raise SynapseError(
+                400,
+                "Field name does not follow Common Namespaced Identifier Grammar",
+                errcode=Codes.INVALID_PARAM,
+            )
+
+        user = UserID.from_string(user_id)
+        await self.profile_handler.check_profile_query_allowed(user, requester_user)
+
+        if field_name == ProfileFields.DISPLAYNAME:
+            field_value: JsonValue = await self.profile_handler.get_displayname(user)
+        elif field_name == ProfileFields.AVATAR_URL:
+            field_value = await self.profile_handler.get_avatar_url(user)
+        else:
+            field_value = await self.profile_handler.get_profile_field(user, field_name)
+
+        return 200, {field_name: field_value}
+
+    async def on_PUT(
+        self, request: SynapseRequest, user_id: str, field_name: str
+    ) -> Tuple[int, JsonDict]:
+        if not UserID.is_valid(user_id):
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST, "Invalid user id", Codes.INVALID_PARAM
+            )
+
+        requester = await self.auth.get_user_by_req(request)
+        user = UserID.from_string(user_id)
+        is_admin = await self.auth.is_server_admin(requester)
+
+        if not field_name:
+            raise SynapseError(400, "Field name too short", errcode=Codes.INVALID_PARAM)
+
+        if len(field_name.encode("utf-8")) > MAX_CUSTOM_FIELD_LEN:
+            raise SynapseError(400, "Field name too long", errcode=Codes.KEY_TOO_LARGE)
+        if not is_namedspaced_grammar(field_name):
+            raise SynapseError(
+                400,
+                "Field name does not follow Common Namespaced Identifier Grammar",
+                errcode=Codes.INVALID_PARAM,
+            )
+
+        content = parse_json_object_from_request(request)
+        try:
+            new_value = content[field_name]
+        except KeyError:
+            raise SynapseError(
+                400, f"Missing key '{field_name}'", errcode=Codes.MISSING_PARAM
+            )
+
+        propagate = _read_propagate(self.hs, request)
+
+        requester_suspended = (
+            await self.hs.get_datastores().main.get_user_suspended_status(
+                requester.user.to_string()
+            )
+        )
+
+        if requester_suspended:
+            raise SynapseError(
+                403,
+                "Updating profile while account is suspended is not allowed.",
+                Codes.USER_ACCOUNT_SUSPENDED,
+            )
+
+        if field_name == ProfileFields.DISPLAYNAME:
+            await self.profile_handler.set_displayname(
+                user, requester, new_value, is_admin, propagate=propagate
+            )
+        elif field_name == ProfileFields.AVATAR_URL:
+            await self.profile_handler.set_avatar_url(
+                user, requester, new_value, is_admin, propagate=propagate
+            )
+        else:
+            await self.profile_handler.set_profile_field(
+                user, requester, field_name, new_value, is_admin
+            )
+
+        return 200, {}
+
+    async def on_DELETE(
+        self, request: SynapseRequest, user_id: str, field_name: str
+    ) -> Tuple[int, JsonDict]:
+        if not UserID.is_valid(user_id):
+            raise SynapseError(
+                HTTPStatus.BAD_REQUEST, "Invalid user id", Codes.INVALID_PARAM
+            )
+
+        requester = await self.auth.get_user_by_req(request)
+        user = UserID.from_string(user_id)
+        is_admin = await self.auth.is_server_admin(requester)
+
+        if not field_name:
+            raise SynapseError(400, "Field name too short", errcode=Codes.INVALID_PARAM)
+
+        if len(field_name.encode("utf-8")) > MAX_CUSTOM_FIELD_LEN:
+            raise SynapseError(400, "Field name too long", errcode=Codes.KEY_TOO_LARGE)
+        if not is_namedspaced_grammar(field_name):
+            raise SynapseError(
+                400,
+                "Field name does not follow Common Namespaced Identifier Grammar",
+                errcode=Codes.INVALID_PARAM,
+            )
+
+        propagate = _read_propagate(self.hs, request)
+
+        requester_suspended = (
+            await self.hs.get_datastores().main.get_user_suspended_status(
+                requester.user.to_string()
+            )
+        )
+
+        if requester_suspended:
+            raise SynapseError(
+                403,
+                "Updating profile while account is suspended is not allowed.",
+                Codes.USER_ACCOUNT_SUSPENDED,
+            )
+
+        if field_name == ProfileFields.DISPLAYNAME:
+            await self.profile_handler.set_displayname(
+                user, requester, "", is_admin, propagate=propagate
+            )
+        elif field_name == ProfileFields.AVATAR_URL:
+            await self.profile_handler.set_avatar_url(
+                user, requester, "", is_admin, propagate=propagate
+            )
+        else:
+            await self.profile_handler.delete_profile_field(
+                user, requester, field_name, is_admin
+            )
+
+        return 200, {}
+
+
 def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
+    # The specific displayname / avatar URL / custom field endpoints *must* appear
+    # before their corresponding generic profile endpoint.
     ProfileDisplaynameRestServlet(hs).register(http_server)
     ProfileAvatarURLRestServlet(hs).register(http_server)
     ProfileRestServlet(hs).register(http_server)
+    if hs.config.experimental.msc4133_enabled:
+        UnstableProfileFieldRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/register.py b/synapse/rest/client/register.py
index 61e1436841..58231d2b04 100644
--- a/synapse/rest/client/register.py
+++ b/synapse/rest/client/register.py
@@ -771,9 +771,12 @@ class RegisterRestServlet(RestServlet):
         body: JsonDict,
         should_issue_refresh_token: bool = False,
     ) -> JsonDict:
-        user_id = await self.registration_handler.appservice_register(
+        user_id, appservice = await self.registration_handler.appservice_register(
             username, as_token
         )
+        if appservice.msc4190_device_management:
+            body["inhibit_login"] = True
+
         return await self._create_registration_details(
             user_id,
             body,
@@ -905,6 +908,14 @@ class RegisterAppServiceOnlyRestServlet(RestServlet):
 
         await self.ratelimiter.ratelimit(None, client_addr, update=False)
 
+        # Allow only ASes to use this API.
+        if body.get("type") != APP_SERVICE_REGISTRATION_TYPE:
+            raise SynapseError(
+                403,
+                "Registration has been disabled. Only m.login.application_service registrations are allowed.",
+                errcode=Codes.FORBIDDEN,
+            )
+
         kind = parse_string(request, "kind", default="user")
 
         if kind == "guest":
@@ -920,10 +931,6 @@ class RegisterAppServiceOnlyRestServlet(RestServlet):
         if not isinstance(desired_username, str) or len(desired_username) > 512:
             raise SynapseError(400, "Invalid username")
 
-        # Allow only ASes to use this API.
-        if body.get("type") != APP_SERVICE_REGISTRATION_TYPE:
-            raise SynapseError(403, "Non-application service registration type")
-
         if not self.auth.has_access_token(request):
             raise SynapseError(
                 400,
@@ -937,7 +944,7 @@ class RegisterAppServiceOnlyRestServlet(RestServlet):
 
         as_token = self.auth.get_access_token_from_request(request)
 
-        user_id = await self.registration_handler.appservice_register(
+        user_id, _ = await self.registration_handler.appservice_register(
             desired_username, as_token
         )
         return 200, {"user_id": user_id}
diff --git a/synapse/rest/client/reporting.py b/synapse/rest/client/reporting.py
index 949f077035..c5037be8b7 100644
--- a/synapse/rest/client/reporting.py
+++ b/synapse/rest/client/reporting.py
@@ -20,13 +20,11 @@
 #
 
 import logging
-import re
 from http import HTTPStatus
 from typing import TYPE_CHECKING, Tuple
 
 from synapse._pydantic_compat import StrictStr
 from synapse.api.errors import AuthError, Codes, NotFoundError, SynapseError
-from synapse.api.urls import CLIENT_API_PREFIX
 from synapse.http.server import HttpServer
 from synapse.http.servlet import (
     RestServlet,
@@ -127,16 +125,6 @@ class ReportRoomRestServlet(RestServlet):
         self.clock = hs.get_clock()
         self.store = hs.get_datastores().main
 
-        # TODO: Remove the unstable variant after 2-3 releases
-        # https://github.com/element-hq/synapse/issues/17373
-        if hs.config.experimental.msc4151_enabled:
-            self.PATTERNS.append(
-                re.compile(
-                    f"^{CLIENT_API_PREFIX}/unstable/org.matrix.msc4151"
-                    "/rooms/(?P<room_id>[^/]*)/report$"
-                )
-            )
-
     class PostBody(RequestBodyModel):
         reason: StrictStr
 
diff --git a/synapse/rest/client/room.py b/synapse/rest/client/room.py
index 8883cd6bc0..03e7bc0a24 100644
--- a/synapse/rest/client/room.py
+++ b/synapse/rest/client/room.py
@@ -783,9 +783,9 @@ class RoomMessageListRestServlet(RestServlet):
         # decorator on `get_number_joined_users_in_room` doesn't play well with
         # the type system. Maybe in the future, it can use some ParamSpec
         # wizardry to fix it up.
-        room_member_count_deferred = run_in_background(  # type: ignore[call-arg]
+        room_member_count_deferred = run_in_background(  # type: ignore[call-overload]
             self.store.get_number_joined_users_in_room,
-            room_id,  # type: ignore[arg-type]
+            room_id,
         )
 
         requester = await self.auth.get_user_by_req(request, allow_guest=True)
diff --git a/synapse/rest/client/sync.py b/synapse/rest/client/sync.py
index f4ef84a038..4fb9c0c8e7 100644
--- a/synapse/rest/client/sync.py
+++ b/synapse/rest/client/sync.py
@@ -24,9 +24,10 @@ from collections import defaultdict
 from typing import TYPE_CHECKING, Any, Dict, List, Mapping, Optional, Tuple, Union
 
 from synapse.api.constants import AccountDataTypes, EduTypes, Membership, PresenceState
-from synapse.api.errors import Codes, StoreError, SynapseError
+from synapse.api.errors import Codes, LimitExceededError, StoreError, SynapseError
 from synapse.api.filtering import FilterCollection
 from synapse.api.presence import UserPresenceState
+from synapse.api.ratelimiting import Ratelimiter
 from synapse.events.utils import (
     SerializeEventConfig,
     format_event_for_client_v2_without_room_id,
@@ -126,6 +127,13 @@ class SyncRestServlet(RestServlet):
             cache_name="sync_valid_filter",
         )
 
+        # Ratelimiter for presence updates, keyed by requester.
+        self._presence_per_user_limiter = Ratelimiter(
+            store=self.store,
+            clock=self.clock,
+            cfg=hs.config.ratelimiting.rc_presence_per_user,
+        )
+
     async def on_GET(self, request: SynapseRequest) -> Tuple[int, JsonDict]:
         # This will always be set by the time Twisted calls us.
         assert request.args is not None
@@ -239,7 +247,14 @@ class SyncRestServlet(RestServlet):
         # send any outstanding server notices to the user.
         await self._server_notices_sender.on_user_syncing(user.to_string())
 
-        affect_presence = set_presence != PresenceState.OFFLINE
+        # ignore the presence update if the ratelimit is exceeded but do not pause the request
+        try:
+            await self._presence_per_user_limiter.ratelimit(requester, pause=0.0)
+        except LimitExceededError:
+            affect_presence = False
+            logger.debug("User set_presence ratelimit exceeded; ignoring it.")
+        else:
+            affect_presence = set_presence != PresenceState.OFFLINE
 
         context = await self.presence_handler.user_syncing(
             user.to_string(),
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index ba1141bbe5..266a0b835b 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -170,10 +170,10 @@ class VersionsRestServlet(RestServlet):
                     ),
                     # MSC4140: Delayed events
                     "org.matrix.msc4140": bool(self.config.server.max_event_delay_ms),
-                    # MSC4151: Report room API (Client-Server API)
-                    "org.matrix.msc4151": self.config.experimental.msc4151_enabled,
                     # Simplified sliding sync
                     "org.matrix.simplified_msc3575": msc3575_enabled,
+                    # Arbitrary key-value profile fields.
+                    "uk.tcpip.msc4133": self.config.experimental.msc4133_enabled,
                 },
             },
         )
diff --git a/synapse/rest/synapse/client/pick_idp.py b/synapse/rest/synapse/client/pick_idp.py
index f26929bd60..5e599f85b0 100644
--- a/synapse/rest/synapse/client/pick_idp.py
+++ b/synapse/rest/synapse/client/pick_idp.py
@@ -21,6 +21,7 @@
 import logging
 from typing import TYPE_CHECKING
 
+from synapse.api.urls import LoginSSORedirectURIBuilder
 from synapse.http.server import (
     DirectServeHtmlResource,
     finish_request,
@@ -49,6 +50,8 @@ class PickIdpResource(DirectServeHtmlResource):
             hs.config.sso.sso_login_idp_picker_template
         )
         self._server_name = hs.hostname
+        self._public_baseurl = hs.config.server.public_baseurl
+        self._login_sso_redirect_url_builder = LoginSSORedirectURIBuilder(hs.config)
 
     async def _async_render_GET(self, request: SynapseRequest) -> None:
         client_redirect_url = parse_string(
@@ -56,25 +59,23 @@ class PickIdpResource(DirectServeHtmlResource):
         )
         idp = parse_string(request, "idp", required=False)
 
-        # if we need to pick an IdP, do so
+        # If we need to pick an IdP, do so
         if not idp:
             return await self._serve_id_picker(request, client_redirect_url)
 
-        # otherwise, redirect to the IdP's redirect URI
-        providers = self._sso_handler.get_identity_providers()
-        auth_provider = providers.get(idp)
-        if not auth_provider:
-            logger.info("Unknown idp %r", idp)
-            self._sso_handler.render_error(
-                request, "unknown_idp", "Unknown identity provider ID"
+        # Otherwise, redirect to the login SSO redirect endpoint for the given IdP
+        # (which will in turn take us to the the IdP's redirect URI).
+        #
+        # We could go directly to the IdP's redirect URI, but this way we ensure that
+        # the user goes through the same logic as normal flow. Additionally, if a proxy
+        # needs to intercept the request, it only needs to intercept the one endpoint.
+        sso_login_redirect_url = (
+            self._login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id=idp, client_redirect_url=client_redirect_url
             )
-            return
-
-        sso_url = await auth_provider.handle_redirect_request(
-            request, client_redirect_url.encode("utf8")
         )
-        logger.info("Redirecting to %s", sso_url)
-        request.redirect(sso_url)
+        logger.info("Redirecting to %s", sso_login_redirect_url)
+        request.redirect(sso_login_redirect_url)
         finish_request(request)
 
     async def _serve_id_picker(
diff --git a/synapse/server.py b/synapse/server.py
index 462e15cc2f..bd2faa61b9 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -391,7 +391,7 @@ class HomeServer(metaclass=abc.ABCMeta):
     def is_mine(self, domain_specific_string: DomainSpecificString) -> bool:
         return domain_specific_string.domain == self.hostname
 
-    def is_mine_id(self, string: str) -> bool:
+    def is_mine_id(self, user_id: str) -> bool:
         """Determines whether a user ID or room alias originates from this homeserver.
 
         Returns:
@@ -399,7 +399,7 @@ class HomeServer(metaclass=abc.ABCMeta):
             homeserver.
             `False` otherwise, or if the user ID or room alias is malformed.
         """
-        localpart_hostname = string.split(":", 1)
+        localpart_hostname = user_id.split(":", 1)
         if len(localpart_hostname) < 2:
             return False
         return localpart_hostname[1] == self.hostname
diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py
index 72b291889b..9e48e09270 100644
--- a/synapse/state/__init__.py
+++ b/synapse/state/__init__.py
@@ -59,11 +59,13 @@ from synapse.types.state import StateFilter
 from synapse.util.async_helpers import Linearizer
 from synapse.util.caches.expiringcache import ExpiringCache
 from synapse.util.metrics import Measure, measure_func
+from synapse.util.stringutils import shortstr
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
     from synapse.storage.controllers import StateStorageController
     from synapse.storage.databases.main import DataStore
+    from synapse.storage.databases.state.deletion import StateDeletionDataStore
 
 logger = logging.getLogger(__name__)
 metrics_logger = logging.getLogger("synapse.state.metrics")
@@ -194,6 +196,8 @@ class StateHandler:
         self._storage_controllers = hs.get_storage_controllers()
         self._events_shard_config = hs.config.worker.events_shard_config
         self._instance_name = hs.get_instance_name()
+        self._state_store = hs.get_datastores().state
+        self._state_deletion_store = hs.get_datastores().state_deletion
 
         self._update_current_state_client = (
             ReplicationUpdateCurrentStateRestServlet.make_client(hs)
@@ -355,6 +359,28 @@ class StateHandler:
                 await_full_state=False,
             )
 
+            # Ensure we still have the state groups we're relying on, and bump
+            # their usage time to avoid them being deleted from under us.
+            if entry.state_group:
+                missing_state_group = await self._state_deletion_store.check_state_groups_and_bump_deletion(
+                    {entry.state_group}
+                )
+                if missing_state_group:
+                    raise Exception(f"Missing state group: {entry.state_group}")
+            elif entry.prev_group:
+                # We only rely on the prev group when persisting the event if we
+                # don't have an `entry.state_group`.
+                missing_state_group = await self._state_deletion_store.check_state_groups_and_bump_deletion(
+                    {entry.prev_group}
+                )
+
+                if missing_state_group:
+                    # If we're missing the prev group then we can just clear the
+                    # entries, and rely on `entry._state` (which must exist if
+                    # `entry.state_group` is None)
+                    entry.prev_group = None
+                    entry.delta_ids = None
+
             state_group_before_event_prev_group = entry.prev_group
             deltas_to_state_group_before_event = entry.delta_ids
             state_ids_before_event = None
@@ -475,7 +501,10 @@ class StateHandler:
     @trace
     @measure_func()
     async def resolve_state_groups_for_events(
-        self, room_id: str, event_ids: StrCollection, await_full_state: bool = True
+        self,
+        room_id: str,
+        event_ids: StrCollection,
+        await_full_state: bool = True,
     ) -> _StateCacheEntry:
         """Given a list of event_ids this method fetches the state at each
         event, resolves conflicts between them and returns them.
@@ -511,6 +540,7 @@ class StateHandler:
             ) = await self._state_storage_controller.get_state_group_delta(
                 state_group_id
             )
+
             return _StateCacheEntry(
                 state=None,
                 state_group=state_group_id,
@@ -531,7 +561,9 @@ class StateHandler:
             room_version,
             state_to_resolve,
             None,
-            state_res_store=StateResolutionStore(self.store),
+            state_res_store=StateResolutionStore(
+                self.store, self._state_deletion_store
+            ),
         )
         return result
 
@@ -663,7 +695,25 @@ class StateResolutionHandler:
         async with self.resolve_linearizer.queue(group_names):
             cache = self._state_cache.get(group_names, None)
             if cache:
-                return cache
+                # Check that the returned cache entry doesn't point to deleted
+                # state groups.
+                state_groups_to_check = set()
+                if cache.state_group is not None:
+                    state_groups_to_check.add(cache.state_group)
+
+                if cache.prev_group is not None:
+                    state_groups_to_check.add(cache.prev_group)
+
+                missing_state_groups = await state_res_store.state_deletion_store.check_state_groups_and_bump_deletion(
+                    state_groups_to_check
+                )
+
+                if not missing_state_groups:
+                    return cache
+                else:
+                    # There are missing state groups, so let's remove the stale
+                    # entry and continue as if it was a cache miss.
+                    self._state_cache.pop(group_names, None)
 
             logger.info(
                 "Resolving state for %s with groups %s",
@@ -671,6 +721,16 @@ class StateResolutionHandler:
                 list(group_names),
             )
 
+            # We double check that none of the state groups have been deleted.
+            # They shouldn't be as all these state groups should be referenced.
+            missing_state_groups = await state_res_store.state_deletion_store.check_state_groups_and_bump_deletion(
+                group_names
+            )
+            if missing_state_groups:
+                raise Exception(
+                    f"State groups have been deleted: {shortstr(missing_state_groups)}"
+                )
+
             state_groups_histogram.observe(len(state_groups_ids))
 
             new_state = await self.resolve_events_with_store(
@@ -884,7 +944,8 @@ class StateResolutionStore:
     in well defined way.
     """
 
-    store: "DataStore"
+    main_store: "DataStore"
+    state_deletion_store: "StateDeletionDataStore"
 
     def get_events(
         self, event_ids: StrCollection, allow_rejected: bool = False
@@ -899,7 +960,7 @@ class StateResolutionStore:
             An awaitable which resolves to a dict from event_id to event.
         """
 
-        return self.store.get_events(
+        return self.main_store.get_events(
             event_ids,
             redact_behaviour=EventRedactBehaviour.as_is,
             get_prev_content=False,
@@ -920,4 +981,4 @@ class StateResolutionStore:
             An awaitable that resolves to a set of event IDs.
         """
 
-        return self.store.get_auth_chain_difference(room_id, state_sets)
+        return self.main_store.get_auth_chain_difference(room_id, state_sets)
diff --git a/synapse/state/v2.py b/synapse/state/v2.py
index da926ad146..d0c0a9fc96 100644
--- a/synapse/state/v2.py
+++ b/synapse/state/v2.py
@@ -29,15 +29,15 @@ from typing import (
     Generator,
     Iterable,
     List,
+    Literal,
     Optional,
+    Protocol,
     Sequence,
     Set,
     Tuple,
     overload,
 )
 
-from typing_extensions import Literal, Protocol
-
 from synapse import event_auth
 from synapse.api.constants import EventTypes
 from synapse.api.errors import AuthError
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index e14d711c76..7251e72e3a 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -86,7 +86,9 @@ class SQLBaseStore(metaclass=ABCMeta):
         """
 
     def _invalidate_state_caches(
-        self, room_id: str, members_changed: Collection[str]
+        self,
+        room_id: str,
+        members_changed: Collection[str],
     ) -> None:
         """Invalidates caches that are based on the current state, but does
         not stream invalidations down replication.
diff --git a/synapse/storage/background_updates.py b/synapse/storage/background_updates.py
index 34139f580d..a02b4cc9ce 100644
--- a/synapse/storage/background_updates.py
+++ b/synapse/storage/background_updates.py
@@ -789,7 +789,7 @@ class BackgroundUpdater:
                 # we may already have a half-built index. Let's just drop it
                 # before trying to create it again.
 
-                sql = "DROP INDEX IF EXISTS %s" % (index_name,)
+                sql = "DROP INDEX CONCURRENTLY IF EXISTS %s" % (index_name,)
                 logger.debug("[SQL] %s", sql)
                 c.execute(sql)
 
@@ -814,7 +814,7 @@ class BackgroundUpdater:
 
                 if replaces_index is not None:
                     # We drop the old index as the new index has now been created.
-                    sql = f"DROP INDEX IF EXISTS {replaces_index}"
+                    sql = f"DROP INDEX CONCURRENTLY IF EXISTS {replaces_index}"
                     logger.debug("[SQL] %s", sql)
                     c.execute(sql)
             finally:
diff --git a/synapse/storage/controllers/persist_events.py b/synapse/storage/controllers/persist_events.py
index 8e5ff1db78..edfb2ab932 100644
--- a/synapse/storage/controllers/persist_events.py
+++ b/synapse/storage/controllers/persist_events.py
@@ -332,6 +332,7 @@ class EventsPersistenceStorageController:
         # store for now.
         self.main_store = stores.main
         self.state_store = stores.state
+        self._state_deletion_store = stores.state_deletion
 
         assert stores.persist_events
         self.persist_events_store = stores.persist_events
@@ -553,7 +554,9 @@ class EventsPersistenceStorageController:
             room_version,
             state_maps_by_state_group,
             event_map=None,
-            state_res_store=StateResolutionStore(self.main_store),
+            state_res_store=StateResolutionStore(
+                self.main_store, self._state_deletion_store
+            ),
         )
 
         return await res.get_state(self._state_controller, StateFilter.all())
@@ -653,15 +656,21 @@ class EventsPersistenceStorageController:
                     state_delta_for_room = DeltaState([], state_map, False)
 
             logger.error("Devon: state delta for room: %s", state_delta_for_room)
-            await self.persist_events_store._persist_events_and_state_updates(
-                room_id,
-                chunk,
-                state_delta_for_room=state_delta_for_room,
-                new_forward_extremities=new_forward_extremities,
-                use_negative_stream_ordering=backfilled,
-                inhibit_local_membership_updates=backfilled,
-                new_event_links=new_event_links,
-            )
+            
+            # Stop the state groups from being deleted while we're persisting
+            # them.
+            async with self._state_deletion_store.persisting_state_group_references(
+                events_and_contexts
+            ):
+                await self.persist_events_store._persist_events_and_state_updates(
+                    room_id,
+                    chunk,
+                    state_delta_for_room=state_delta_for_room,
+                    new_forward_extremities=new_forward_extremities,
+                    use_negative_stream_ordering=backfilled,
+                    inhibit_local_membership_updates=backfilled,
+                    new_event_links=new_event_links,
+                )
 
         return replaced_events
 
@@ -983,7 +992,9 @@ class EventsPersistenceStorageController:
             room_version,
             state_groups,
             events_map,
-            state_res_store=StateResolutionStore(self.main_store),
+            state_res_store=StateResolutionStore(
+                self.main_store, self._state_deletion_store
+            ),
         )
 
         state_resolutions_during_persistence.inc()
diff --git a/synapse/storage/controllers/purge_events.py b/synapse/storage/controllers/purge_events.py
index e794b370c2..c2d4bf8290 100644
--- a/synapse/storage/controllers/purge_events.py
+++ b/synapse/storage/controllers/purge_events.py
@@ -21,10 +21,19 @@
 
 import itertools
 import logging
-from typing import TYPE_CHECKING, Set
+from typing import (
+    TYPE_CHECKING,
+    Collection,
+    Mapping,
+    Optional,
+    Set,
+)
 
 from synapse.logging.context import nested_logging_context
+from synapse.metrics.background_process_metrics import wrap_as_background_process
+from synapse.storage.database import LoggingTransaction
 from synapse.storage.databases import Databases
+from synapse.types.storage import _BackgroundUpdates
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
@@ -38,12 +47,22 @@ class PurgeEventsStorageController:
     def __init__(self, hs: "HomeServer", stores: Databases):
         self.stores = stores
 
+        if hs.config.worker.run_background_tasks:
+            self._delete_state_loop_call = hs.get_clock().looping_call(
+                self._delete_state_groups_loop, 60 * 1000
+            )
+
+        self.stores.state.db_pool.updates.register_background_update_handler(
+            _BackgroundUpdates.MARK_UNREFERENCED_STATE_GROUPS_FOR_DELETION_BG_UPDATE,
+            self._background_delete_unrefereneced_state_groups,
+        )
+
     async def purge_room(self, room_id: str) -> None:
         """Deletes all record of a room"""
 
         with nested_logging_context(room_id):
-            state_groups_to_delete = await self.stores.main.purge_room(room_id)
-            await self.stores.state.purge_room_state(room_id, state_groups_to_delete)
+            await self.stores.main.purge_room(room_id)
+            await self.stores.state.purge_room_state(room_id)
 
     async def purge_history(
         self, room_id: str, token: str, delete_local_events: bool
@@ -68,11 +87,16 @@ class PurgeEventsStorageController:
             logger.info("[purge] finding state groups that can be deleted")
             sg_to_delete = await self._find_unreferenced_groups(state_groups)
 
-            await self.stores.state.purge_unreferenced_state_groups(
-                room_id, sg_to_delete
+            # Mark these state groups as pending deletion, they will actually
+            # get deleted automatically later.
+            await self.stores.state_deletion.mark_state_groups_as_pending_deletion(
+                sg_to_delete
             )
 
-    async def _find_unreferenced_groups(self, state_groups: Set[int]) -> Set[int]:
+    async def _find_unreferenced_groups(
+        self,
+        state_groups: Collection[int],
+    ) -> Set[int]:
         """Used when purging history to figure out which state groups can be
         deleted.
 
@@ -118,6 +142,307 @@ class PurgeEventsStorageController:
             next_to_search |= prevs
             state_groups_seen |= prevs
 
+            # We also check to see if anything referencing the state groups are
+            # also unreferenced. This helps ensure that we delete unreferenced
+            # state groups, if we don't then we will de-delta them when we
+            # delete the other state groups leading to increased DB usage.
+            next_edges = await self.stores.state.get_next_state_groups(current_search)
+            nexts = set(next_edges.keys())
+            nexts -= state_groups_seen
+            next_to_search |= nexts
+            state_groups_seen |= nexts
+
         to_delete = state_groups_seen - referenced_groups
 
         return to_delete
+
+    @wrap_as_background_process("_delete_state_groups_loop")
+    async def _delete_state_groups_loop(self) -> None:
+        """Background task that deletes any state groups that may be pending
+        deletion."""
+
+        while True:
+            next_to_delete = await self.stores.state_deletion.get_next_state_group_collection_to_delete()
+            if next_to_delete is None:
+                break
+
+            (room_id, groups_to_sequences) = next_to_delete
+            made_progress = await self._delete_state_groups(
+                room_id, groups_to_sequences
+            )
+
+            # If no progress was made in deleting the state groups, then we
+            # break to allow a pause before trying again next time we get
+            # called.
+            if not made_progress:
+                break
+
+    async def _delete_state_groups(
+        self, room_id: str, groups_to_sequences: Mapping[int, int]
+    ) -> bool:
+        """Tries to delete the given state groups.
+
+        Returns:
+            Whether we made progress in deleting the state groups (or marking
+            them as referenced).
+        """
+
+        # We double check if any of the state groups have become referenced.
+        # This shouldn't happen, as any usages should cause the state group to
+        # be removed as pending deletion.
+        referenced_state_groups = await self.stores.main.get_referenced_state_groups(
+            groups_to_sequences
+        )
+
+        if referenced_state_groups:
+            # We mark any state groups that have become referenced as being
+            # used.
+            await self.stores.state_deletion.mark_state_groups_as_used(
+                referenced_state_groups
+            )
+
+            # Update list of state groups to remove referenced ones
+            groups_to_sequences = {
+                state_group: sequence_number
+                for state_group, sequence_number in groups_to_sequences.items()
+                if state_group not in referenced_state_groups
+            }
+
+        if not groups_to_sequences:
+            # We made progress here as long as we marked some state groups as
+            # now referenced.
+            return len(referenced_state_groups) > 0
+
+        return await self.stores.state.purge_unreferenced_state_groups(
+            room_id,
+            groups_to_sequences,
+        )
+
+    async def _background_delete_unrefereneced_state_groups(
+        self, progress: dict, batch_size: int
+    ) -> int:
+        """This background update will slowly delete any unreferenced state groups"""
+
+        last_checked_state_group = progress.get("last_checked_state_group")
+
+        if last_checked_state_group is None:
+            # This is the first run.
+            last_checked_state_group = (
+                await self.stores.state.db_pool.simple_select_one_onecol(
+                    table="state_groups",
+                    keyvalues={},
+                    retcol="MAX(id)",
+                    allow_none=True,
+                    desc="get_max_state_group",
+                )
+            )
+            if last_checked_state_group is None:
+                # There are no state groups so the background process is finished.
+                await self.stores.state.db_pool.updates._end_background_update(
+                    _BackgroundUpdates.MARK_UNREFERENCED_STATE_GROUPS_FOR_DELETION_BG_UPDATE
+                )
+                return batch_size
+            last_checked_state_group += 1
+
+        (
+            last_checked_state_group,
+            final_batch,
+        ) = await self._delete_unreferenced_state_groups_batch(
+            last_checked_state_group,
+            batch_size,
+        )
+
+        if not final_batch:
+            # There are more state groups to check.
+            progress = {
+                "last_checked_state_group": last_checked_state_group,
+            }
+            await self.stores.state.db_pool.updates._background_update_progress(
+                _BackgroundUpdates.MARK_UNREFERENCED_STATE_GROUPS_FOR_DELETION_BG_UPDATE,
+                progress,
+            )
+        else:
+            # This background process is finished.
+            await self.stores.state.db_pool.updates._end_background_update(
+                _BackgroundUpdates.MARK_UNREFERENCED_STATE_GROUPS_FOR_DELETION_BG_UPDATE
+            )
+
+        return batch_size
+
+    async def _delete_unreferenced_state_groups_batch(
+        self,
+        last_checked_state_group: int,
+        batch_size: int,
+    ) -> tuple[int, bool]:
+        """Looks for unreferenced state groups starting from the last state group
+        checked and marks them for deletion.
+
+        Args:
+            last_checked_state_group: The last state group that was checked.
+            batch_size: How many state groups to process in this iteration.
+
+        Returns:
+            (last_checked_state_group, final_batch)
+        """
+
+        # Find all state groups that can be deleted if any of the original set are deleted.
+        (
+            to_delete,
+            last_checked_state_group,
+            final_batch,
+        ) = await self._find_unreferenced_groups_for_background_deletion(
+            last_checked_state_group, batch_size
+        )
+
+        if len(to_delete) == 0:
+            return last_checked_state_group, final_batch
+
+        await self.stores.state_deletion.mark_state_groups_as_pending_deletion(
+            to_delete
+        )
+
+        return last_checked_state_group, final_batch
+
+    async def _find_unreferenced_groups_for_background_deletion(
+        self,
+        last_checked_state_group: int,
+        batch_size: int,
+    ) -> tuple[Set[int], int, bool]:
+        """Used when deleting unreferenced state groups in the background to figure out
+        which state groups can be deleted.
+        To avoid increased DB usage due to de-deltaing state groups, this returns only
+        state groups which are free standing (ie. no shared edges with referenced groups) or
+        state groups which do not share edges which result in a future referenced group.
+
+        The following scenarios outline the possibilities based on state group data in
+        the DB.
+
+        ie. Free standing -> state groups 1-N would be returned:
+            SG_1
+            |
+            ...
+            |
+            SG_N
+
+        ie. Previous reference -> state groups 2-N would be returned:
+            SG_1 <- referenced by event
+            |
+            SG_2
+            |
+            ...
+            |
+            SG_N
+
+        ie. Future reference -> none of the following state groups would be returned:
+            SG_1
+            |
+            SG_2
+            |
+            ...
+            |
+            SG_N <- referenced by event
+
+        Args:
+            last_checked_state_group: The last state group that was checked.
+            batch_size: How many state groups to process in this iteration.
+
+        Returns:
+            (to_delete, last_checked_state_group, final_batch)
+        """
+
+        # If a state group's next edge is not pending deletion then we don't delete the state group.
+        # If there is no next edge or the next edges are all marked for deletion, then delete
+        # the state group.
+        # This holds since we walk backwards from the latest state groups, ensuring that
+        # we've already checked newer state groups for event references along the way.
+        def get_next_state_groups_marked_for_deletion_txn(
+            txn: LoggingTransaction,
+        ) -> tuple[dict[int, bool], dict[int, int]]:
+            state_group_sql = """
+                SELECT s.id, e.state_group, d.state_group
+                FROM (
+                    SELECT id FROM state_groups
+                    WHERE id < ? ORDER BY id DESC LIMIT ?
+                ) as s
+                LEFT JOIN state_group_edges AS e ON (s.id = e.prev_state_group)
+                LEFT JOIN state_groups_pending_deletion AS d ON (e.state_group = d.state_group)
+            """
+            txn.execute(state_group_sql, (last_checked_state_group, batch_size))
+
+            # Mapping from state group to whether we should delete it.
+            state_groups_to_deletion: dict[int, bool] = {}
+
+            # Mapping from state group to prev state group.
+            state_groups_to_prev: dict[int, int] = {}
+
+            for row in txn:
+                state_group = row[0]
+                next_edge = row[1]
+                pending_deletion = row[2]
+
+                if next_edge is not None:
+                    state_groups_to_prev[next_edge] = state_group
+
+                if next_edge is not None and not pending_deletion:
+                    # We have found an edge not marked for deletion.
+                    # Check previous results to see if this group is part of a chain
+                    # within this batch that qualifies for deletion.
+                    # ie. batch contains:
+                    # SG_1 -> SG_2 -> SG_3
+                    # If SG_3 is a candidate for deletion, then SG_2 & SG_1 should also
+                    # be, even though they have edges which may not be marked for
+                    # deletion.
+                    # This relies on SQL results being sorted in DESC order to work.
+                    next_is_deletion_candidate = state_groups_to_deletion.get(next_edge)
+                    if (
+                        next_is_deletion_candidate is None
+                        or not next_is_deletion_candidate
+                    ):
+                        state_groups_to_deletion[state_group] = False
+                    else:
+                        state_groups_to_deletion.setdefault(state_group, True)
+                else:
+                    # This state group may be a candidate for deletion
+                    state_groups_to_deletion.setdefault(state_group, True)
+
+            return state_groups_to_deletion, state_groups_to_prev
+
+        (
+            state_groups_to_deletion,
+            state_group_edges,
+        ) = await self.stores.state.db_pool.runInteraction(
+            "get_next_state_groups_marked_for_deletion",
+            get_next_state_groups_marked_for_deletion_txn,
+        )
+        deletion_candidates = {
+            state_group
+            for state_group, deletion in state_groups_to_deletion.items()
+            if deletion
+        }
+
+        final_batch = False
+        state_groups = state_groups_to_deletion.keys()
+        if len(state_groups) < batch_size:
+            final_batch = True
+        else:
+            last_checked_state_group = min(state_groups)
+
+        if len(state_groups) == 0:
+            return set(), last_checked_state_group, final_batch
+
+        # Determine if any of the remaining state groups are directly referenced.
+        referenced = await self.stores.main.get_referenced_state_groups(
+            deletion_candidates
+        )
+
+        # Remove state groups from deletion_candidates which are directly referenced or share a
+        # future edge with a referenced state group within this batch.
+        def filter_reference_chains(group: Optional[int]) -> None:
+            while group is not None:
+                deletion_candidates.discard(group)
+                group = state_group_edges.get(group)
+
+        for referenced_group in referenced:
+            filter_reference_chains(referenced_group)
+
+        return deletion_candidates, last_checked_state_group, final_batch
diff --git a/synapse/storage/database.py b/synapse/storage/database.py
index cb4a5857be..a4941e58f6 100644
--- a/synapse/storage/database.py
+++ b/synapse/storage/database.py
@@ -35,6 +35,7 @@ from typing import (
     Iterable,
     Iterator,
     List,
+    Literal,
     Mapping,
     Optional,
     Sequence,
@@ -47,7 +48,7 @@ from typing import (
 
 import attr
 from prometheus_client import Counter, Histogram
-from typing_extensions import Concatenate, Literal, ParamSpec
+from typing_extensions import Concatenate, ParamSpec
 
 from twisted.enterprise import adbapi
 from twisted.internet.interfaces import IReactorCore
@@ -2159,10 +2160,26 @@ class DatabasePool:
         if rowcount > 1:
             raise StoreError(500, "More than one row matched (%s)" % (table,))
 
-    # Ideally we could use the overload decorator here to specify that the
-    # return type is only optional if allow_none is True, but this does not work
-    # when you call a static method from an instance.
-    # See https://github.com/python/mypy/issues/7781
+    @overload
+    @staticmethod
+    def simple_select_one_txn(
+        txn: LoggingTransaction,
+        table: str,
+        keyvalues: Dict[str, Any],
+        retcols: Collection[str],
+        allow_none: Literal[False] = False,
+    ) -> Tuple[Any, ...]: ...
+
+    @overload
+    @staticmethod
+    def simple_select_one_txn(
+        txn: LoggingTransaction,
+        table: str,
+        keyvalues: Dict[str, Any],
+        retcols: Collection[str],
+        allow_none: Literal[True] = True,
+    ) -> Optional[Tuple[Any, ...]]: ...
+
     @staticmethod
     def simple_select_one_txn(
         txn: LoggingTransaction,
diff --git a/synapse/storage/databases/__init__.py b/synapse/storage/databases/__init__.py
index dd9fc01fb0..81886ff765 100644
--- a/synapse/storage/databases/__init__.py
+++ b/synapse/storage/databases/__init__.py
@@ -26,6 +26,7 @@ from synapse.storage._base import SQLBaseStore
 from synapse.storage.database import DatabasePool, make_conn
 from synapse.storage.databases.main.events import PersistEventsStore
 from synapse.storage.databases.state import StateGroupDataStore
+from synapse.storage.databases.state.deletion import StateDeletionDataStore
 from synapse.storage.engines import create_engine
 from synapse.storage.prepare_database import prepare_database
 
@@ -49,12 +50,14 @@ class Databases(Generic[DataStoreT]):
         main
         state
         persist_events
+        state_deletion
     """
 
     databases: List[DatabasePool]
     main: "DataStore"  # FIXME: https://github.com/matrix-org/synapse/issues/11165: actually an instance of `main_store_class`
     state: StateGroupDataStore
     persist_events: Optional[PersistEventsStore]
+    state_deletion: StateDeletionDataStore
 
     def __init__(self, main_store_class: Type[DataStoreT], hs: "HomeServer"):
         # Note we pass in the main store class here as workers use a different main
@@ -63,6 +66,7 @@ class Databases(Generic[DataStoreT]):
         self.databases = []
         main: Optional[DataStoreT] = None
         state: Optional[StateGroupDataStore] = None
+        state_deletion: Optional[StateDeletionDataStore] = None
         persist_events: Optional[PersistEventsStore] = None
 
         for database_config in hs.config.database.databases:
@@ -114,7 +118,8 @@ class Databases(Generic[DataStoreT]):
                     if state:
                         raise Exception("'state' data store already configured")
 
-                    state = StateGroupDataStore(database, db_conn, hs)
+                    state_deletion = StateDeletionDataStore(database, db_conn, hs)
+                    state = StateGroupDataStore(database, db_conn, hs, state_deletion)
 
                 db_conn.commit()
 
@@ -135,7 +140,7 @@ class Databases(Generic[DataStoreT]):
         if not main:
             raise Exception("No 'main' database configured")
 
-        if not state:
+        if not state or not state_deletion:
             raise Exception("No 'state' database configured")
 
         # We use local variables here to ensure that the databases do not have
@@ -143,3 +148,4 @@ class Databases(Generic[DataStoreT]):
         self.main = main  # type: ignore[assignment]
         self.state = state
         self.persist_events = persist_events
+        self.state_deletion = state_deletion
diff --git a/synapse/storage/databases/main/cache.py b/synapse/storage/databases/main/cache.py
index 32c3472e58..f364464c23 100644
--- a/synapse/storage/databases/main/cache.py
+++ b/synapse/storage/databases/main/cache.py
@@ -219,6 +219,11 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
                     room_id = row.keys[0]
                     members_changed = set(row.keys[1:])
                     self._invalidate_state_caches(room_id, members_changed)
+                    self._curr_state_delta_stream_cache.entity_has_changed(  # type: ignore[attr-defined]
+                        room_id, token
+                    )
+                    for user_id in members_changed:
+                        self._membership_stream_cache.entity_has_changed(user_id, token)  # type: ignore[attr-defined]
                 elif row.cache_func == PURGE_HISTORY_CACHE_NAME:
                     if row.keys is None:
                         raise Exception(
@@ -236,6 +241,35 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
                     room_id = row.keys[0]
                     self._invalidate_caches_for_room_events(room_id)
                     self._invalidate_caches_for_room(room_id)
+                    self._curr_state_delta_stream_cache.entity_has_changed(  # type: ignore[attr-defined]
+                        room_id, token
+                    )
+                    # Note: This code is commented out to improve cache performance.
+                    # While uncommenting would provide complete correctness, our
+                    # automatic forgotten room purge logic (see
+                    # `forgotten_room_retention_period`) means this would frequently
+                    # clear the entire cache (effectively) and probably have a noticable
+                    # impact on the cache hit ratio.
+                    #
+                    # Not updating the cache here is safe because:
+                    #
+                    #  1. `_membership_stream_cache` is only used to indicate the
+                    #     *absence* of changes, i.e. "nothing has changed between tokens
+                    #     X and Y and so return early and don't query the database".
+                    #  2. `_membership_stream_cache` is used when we query data from
+                    #     `current_state_delta_stream` and `room_memberships` but since
+                    #     nothing new is written to the database for those tables when
+                    #     purging/deleting a room (only deleting rows), there is nothing
+                    #     changed to care about.
+                    #
+                    # At worst, the cache might indicate a change at token X, at which
+                    # point, we will query the database and discover nothing is there.
+                    #
+                    # Ideally, we would make it so that we could clear the cache on a
+                    # more granular level but that's a bit complex and fiddly to do with
+                    # room membership.
+                    #
+                    # self._membership_stream_cache.all_entities_changed(token)  # type: ignore[attr-defined]
                 else:
                     self._attempt_to_invalidate_cache(row.cache_func, row.keys)
 
@@ -275,6 +309,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
                 self._attempt_to_invalidate_cache(
                     "get_sliding_sync_rooms_for_user", None
                 )
+                self._membership_stream_cache.entity_has_changed(data.state_key, token)  # type: ignore[attr-defined]
             elif data.type == EventTypes.RoomEncryption:
                 self._attempt_to_invalidate_cache(
                     "get_room_encryption", (data.room_id,)
@@ -291,6 +326,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
             # Similar to the above, but the entire caches are invalidated. This is
             # unfortunate for the membership caches, but should recover quickly.
             self._curr_state_delta_stream_cache.entity_has_changed(data.room_id, token)  # type: ignore[attr-defined]
+            self._membership_stream_cache.all_entities_changed(token)  # type: ignore[attr-defined]
             self._attempt_to_invalidate_cache("get_rooms_for_user", None)
             self._attempt_to_invalidate_cache("get_room_type", (data.room_id,))
             self._attempt_to_invalidate_cache("get_room_encryption", (data.room_id,))
@@ -322,6 +358,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
         self._attempt_to_invalidate_cache(
             "get_unread_event_push_actions_by_room_for_user", (room_id,)
         )
+        self._attempt_to_invalidate_cache("get_metadata_for_event", (room_id, event_id))
 
         self._attempt_to_invalidate_cache("_get_max_event_pos", (room_id,))
 
@@ -446,6 +483,7 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
         self._attempt_to_invalidate_cache("_get_state_group_for_event", None)
 
         self._attempt_to_invalidate_cache("get_event_ordering", None)
+        self._attempt_to_invalidate_cache("get_metadata_for_event", (room_id,))
         self._attempt_to_invalidate_cache("is_partial_state_event", None)
         self._attempt_to_invalidate_cache("_get_joined_profile_from_event_id", None)
 
diff --git a/synapse/storage/databases/main/client_ips.py b/synapse/storage/databases/main/client_ips.py
index bf6cfcbfd9..e8c322ab5c 100644
--- a/synapse/storage/databases/main/client_ips.py
+++ b/synapse/storage/databases/main/client_ips.py
@@ -20,10 +20,19 @@
 #
 
 import logging
-from typing import TYPE_CHECKING, Dict, List, Mapping, Optional, Tuple, Union, cast
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    List,
+    Mapping,
+    Optional,
+    Tuple,
+    TypedDict,
+    Union,
+    cast,
+)
 
 import attr
-from typing_extensions import TypedDict
 
 from synapse.metrics.background_process_metrics import wrap_as_background_process
 from synapse.storage._base import SQLBaseStore
diff --git a/synapse/storage/databases/main/delayed_events.py b/synapse/storage/databases/main/delayed_events.py
index 1616e30e22..c88682d55c 100644
--- a/synapse/storage/databases/main/delayed_events.py
+++ b/synapse/storage/databases/main/delayed_events.py
@@ -424,25 +424,37 @@ class DelayedEventsStore(SQLBaseStore):
         room_id: str,
         event_type: str,
         state_key: str,
+        not_from_localpart: str,
     ) -> Optional[Timestamp]:
         """
         Cancels all matching delayed state events, i.e. remove them as long as they haven't been processed.
 
+        Args:
+            room_id: The room ID to match against.
+            event_type: The event type to match against.
+            state_key: The state key to match against.
+            not_from_localpart: The localpart of a user whose delayed events to not cancel.
+                If set to the empty string, any users' delayed events may be cancelled.
+
         Returns: The send time of the next delayed event to be sent, if any.
         """
 
         def cancel_delayed_state_events_txn(
             txn: LoggingTransaction,
         ) -> Optional[Timestamp]:
-            self.db_pool.simple_delete_txn(
-                txn,
-                table="delayed_events",
-                keyvalues={
-                    "room_id": room_id,
-                    "event_type": event_type,
-                    "state_key": state_key,
-                    "is_processed": False,
-                },
+            txn.execute(
+                """
+                DELETE FROM delayed_events
+                WHERE room_id = ? AND event_type = ? AND state_key = ?
+                    AND user_localpart <> ?
+                    AND NOT is_processed
+                """,
+                (
+                    room_id,
+                    event_type,
+                    state_key,
+                    not_from_localpart,
+                ),
             )
             return self._get_next_delayed_event_send_ts_txn(txn)
 
diff --git a/synapse/storage/databases/main/devices.py b/synapse/storage/databases/main/devices.py
index 8088943253..0b6d1f2b05 100644
--- a/synapse/storage/databases/main/devices.py
+++ b/synapse/storage/databases/main/devices.py
@@ -27,6 +27,7 @@ from typing import (
     Dict,
     Iterable,
     List,
+    Literal,
     Mapping,
     Optional,
     Set,
@@ -35,7 +36,6 @@ from typing import (
 )
 
 from canonicaljson import encode_canonical_json
-from typing_extensions import Literal
 
 from synapse.api.constants import EduTypes
 from synapse.api.errors import Codes, StoreError
diff --git a/synapse/storage/databases/main/e2e_room_keys.py b/synapse/storage/databases/main/e2e_room_keys.py
index c2c93e12d9..904ae5cb58 100644
--- a/synapse/storage/databases/main/e2e_room_keys.py
+++ b/synapse/storage/databases/main/e2e_room_keys.py
@@ -19,9 +19,18 @@
 #
 #
 
-from typing import TYPE_CHECKING, Dict, Iterable, List, Mapping, Optional, Tuple, cast
-
-from typing_extensions import Literal, TypedDict
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    Iterable,
+    List,
+    Literal,
+    Mapping,
+    Optional,
+    Tuple,
+    TypedDict,
+    cast,
+)
 
 from synapse.api.errors import StoreError
 from synapse.logging.opentracing import log_kv, trace
@@ -510,19 +519,16 @@ class EndToEndRoomKeyStore(EndToEndRoomKeyBackgroundStore):
                     # it isn't there.
                     raise StoreError(404, "No backup with that version exists")
 
-            row = cast(
-                Tuple[int, str, str, Optional[int]],
-                self.db_pool.simple_select_one_txn(
-                    txn,
-                    table="e2e_room_keys_versions",
-                    keyvalues={
-                        "user_id": user_id,
-                        "version": this_version,
-                        "deleted": 0,
-                    },
-                    retcols=("version", "algorithm", "auth_data", "etag"),
-                    allow_none=False,
-                ),
+            row = self.db_pool.simple_select_one_txn(
+                txn,
+                table="e2e_room_keys_versions",
+                keyvalues={
+                    "user_id": user_id,
+                    "version": this_version,
+                    "deleted": 0,
+                },
+                retcols=("version", "algorithm", "auth_data", "etag"),
+                allow_none=False,
             )
             return {
                 "auth_data": db_to_json(row[2]),
diff --git a/synapse/storage/databases/main/end_to_end_keys.py b/synapse/storage/databases/main/end_to_end_keys.py
index 3bb8fccb5e..b4c7069958 100644
--- a/synapse/storage/databases/main/end_to_end_keys.py
+++ b/synapse/storage/databases/main/end_to_end_keys.py
@@ -27,6 +27,7 @@ from typing import (
     Dict,
     Iterable,
     List,
+    Literal,
     Mapping,
     Optional,
     Sequence,
@@ -39,7 +40,6 @@ from typing import (
 
 import attr
 from canonicaljson import encode_canonical_json
-from typing_extensions import Literal
 
 from synapse.api.constants import DeviceKeyAlgorithms
 from synapse.appservice import (
diff --git a/synapse/storage/databases/main/events.py b/synapse/storage/databases/main/events.py
index da6ae8024a..c0e80f1dea 100644
--- a/synapse/storage/databases/main/events.py
+++ b/synapse/storage/databases/main/events.py
@@ -35,12 +35,12 @@ from typing import (
     Sequence,
     Set,
     Tuple,
+    TypedDict,
     cast,
 )
 
 import attr
 from prometheus_client import Counter
-from typing_extensions import TypedDict
 
 import synapse.metrics
 from synapse.api.constants import (
@@ -1606,7 +1606,13 @@ class PersistEventsStore:
             room_id
             delta_state: Deltas that are going to be used to update the
                 `current_state_events` table. Changes to the current state of the room.
-            stream_id: TODO
+            stream_id: This is expected to be the minimum `stream_ordering` for the
+                batch of events that we are persisting; which means we do not end up in a
+                situation where workers see events before the `current_state_delta` updates.
+                FIXME: However, this function also gets called with next upcoming
+                `stream_ordering` when we re-sync the state of a partial stated room (see
+                `update_current_state(...)`) which may be "correct" but it would be good to
+                nail down what exactly is the expected value here.
             sliding_sync_table_changes: Changes to the
                 `sliding_sync_membership_snapshots` and `sliding_sync_joined_rooms` tables
                 derived from the given `delta_state` (see
@@ -1909,6 +1915,13 @@ class PersistEventsStore:
             stream_id,
         )
 
+        for user_id in members_to_cache_bust:
+            txn.call_after(
+                self.store._membership_stream_cache.entity_has_changed,
+                user_id,
+                stream_id,
+            )
+
         # Invalidate the various caches
         self.store._invalidate_state_caches_and_stream(
             txn, room_id, members_to_cache_bust
diff --git a/synapse/storage/databases/main/events_worker.py b/synapse/storage/databases/main/events_worker.py
index 403407068c..82b2ad4408 100644
--- a/synapse/storage/databases/main/events_worker.py
+++ b/synapse/storage/databases/main/events_worker.py
@@ -30,6 +30,7 @@ from typing import (
     Dict,
     Iterable,
     List,
+    Literal,
     Mapping,
     MutableMapping,
     Optional,
@@ -41,7 +42,6 @@ from typing import (
 
 import attr
 from prometheus_client import Gauge
-from typing_extensions import Literal
 
 from twisted.internet import defer
 
@@ -193,6 +193,14 @@ class _EventRow:
     outlier: bool
 
 
+@attr.s(slots=True, frozen=True, auto_attribs=True)
+class EventMetadata:
+    """Event metadata returned by `get_metadata_for_event(..)`"""
+
+    sender: str
+    received_ts: int
+
+
 class EventRedactBehaviour(Enum):
     """
     What to do when retrieving a redacted event from the database.
@@ -331,6 +339,16 @@ class EventsWorkerStore(SQLBaseStore):
             writers=["master"],
         )
 
+        # Added to accommodate some queries for the admin API in order to fetch/filter
+        # membership events by when it was received
+        self.db_pool.updates.register_background_index_update(
+            update_name="events_received_ts_index",
+            index_name="received_ts_idx",
+            table="events",
+            columns=("received_ts",),
+            where_clause="type = 'm.room.member'",
+        )
+
     def get_un_partial_stated_events_token(self, instance_name: str) -> int:
         return (
             self._un_partial_stated_events_stream_id_gen.get_current_token_for_writer(
@@ -2580,3 +2598,60 @@ class EventsWorkerStore(SQLBaseStore):
                 _BackgroundUpdates.SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_BG_UPDATE,
             )
         )
+
+    async def get_sent_invite_count_by_user(self, user_id: str, from_ts: int) -> int:
+        """
+        Get the number of invites sent by the given user at or after the provided timestamp.
+
+        Args:
+            user_id: user ID to search against
+            from_ts: a timestamp in milliseconds from the unix epoch. Filters against
+                `events.received_ts`
+
+        """
+
+        def _get_sent_invite_count_by_user_txn(
+            txn: LoggingTransaction, user_id: str, from_ts: int
+        ) -> int:
+            sql = """
+                  SELECT COUNT(rm.event_id)
+                  FROM room_memberships AS rm
+                  INNER JOIN events AS e USING(event_id)
+                  WHERE rm.sender = ?
+                    AND rm.membership = 'invite'
+                    AND e.type = 'm.room.member'
+                    AND e.received_ts >= ?
+            """
+
+            txn.execute(sql, (user_id, from_ts))
+            res = txn.fetchone()
+
+            if res is None:
+                return 0
+            return int(res[0])
+
+        return await self.db_pool.runInteraction(
+            "_get_sent_invite_count_by_user_txn",
+            _get_sent_invite_count_by_user_txn,
+            user_id,
+            from_ts,
+        )
+
+    @cached(tree=True)
+    async def get_metadata_for_event(
+        self, room_id: str, event_id: str
+    ) -> Optional[EventMetadata]:
+        row = await self.db_pool.simple_select_one(
+            table="events",
+            keyvalues={"room_id": room_id, "event_id": event_id},
+            retcols=("sender", "received_ts"),
+            allow_none=True,
+            desc="get_metadata_for_event",
+        )
+        if row is None:
+            return None
+
+        return EventMetadata(
+            sender=row[0],
+            received_ts=row[1],
+        )
diff --git a/synapse/storage/databases/main/profile.py b/synapse/storage/databases/main/profile.py
index 41cf08211f..30d8a58d96 100644
--- a/synapse/storage/databases/main/profile.py
+++ b/synapse/storage/databases/main/profile.py
@@ -18,8 +18,13 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
-from typing import TYPE_CHECKING, Optional
+import json
+from typing import TYPE_CHECKING, Dict, Optional, Tuple, cast
 
+from canonicaljson import encode_canonical_json
+
+from synapse.api.constants import ProfileFields
+from synapse.api.errors import Codes, StoreError
 from synapse.storage._base import SQLBaseStore
 from synapse.storage.database import (
     DatabasePool,
@@ -27,13 +32,17 @@ from synapse.storage.database import (
     LoggingTransaction,
 )
 from synapse.storage.databases.main.roommember import ProfileInfo
-from synapse.storage.engines import PostgresEngine
-from synapse.types import JsonDict, UserID
+from synapse.storage.engines import PostgresEngine, Sqlite3Engine
+from synapse.types import JsonDict, JsonValue, UserID
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
 
 
+# The number of bytes that the serialized profile can have.
+MAX_PROFILE_SIZE = 65536
+
+
 class ProfileWorkerStore(SQLBaseStore):
     def __init__(
         self,
@@ -201,6 +210,89 @@ class ProfileWorkerStore(SQLBaseStore):
             desc="get_profile_avatar_url",
         )
 
+    async def get_profile_field(self, user_id: UserID, field_name: str) -> JsonValue:
+        """
+        Get a custom profile field for a user.
+
+        Args:
+            user_id: The user's ID.
+            field_name: The custom profile field name.
+
+        Returns:
+            The string value if the field exists, otherwise raises 404.
+        """
+
+        def get_profile_field(txn: LoggingTransaction) -> JsonValue:
+            # This will error if field_name has double quotes in it, but that's not
+            # possible due to the grammar.
+            field_path = f'$."{field_name}"'
+
+            if isinstance(self.database_engine, PostgresEngine):
+                sql = """
+                SELECT JSONB_PATH_EXISTS(fields, ?), JSONB_EXTRACT_PATH(fields, ?)
+                FROM profiles
+                WHERE user_id = ?
+                """
+                txn.execute(
+                    sql,
+                    (field_path, field_name, user_id.localpart),
+                )
+
+                # Test exists first since value being None is used for both
+                # missing and a null JSON value.
+                exists, value = cast(Tuple[bool, JsonValue], txn.fetchone())
+                if not exists:
+                    raise StoreError(404, "No row found")
+                return value
+
+            else:
+                sql = """
+                SELECT JSON_TYPE(fields, ?), JSON_EXTRACT(fields, ?)
+                FROM profiles
+                WHERE user_id = ?
+                """
+                txn.execute(
+                    sql,
+                    (field_path, field_path, user_id.localpart),
+                )
+
+                # If value_type is None, then the value did not exist.
+                value_type, value = cast(
+                    Tuple[Optional[str], JsonValue], txn.fetchone()
+                )
+                if not value_type:
+                    raise StoreError(404, "No row found")
+                # If value_type is object or array, then need to deserialize the JSON.
+                # Scalar values are properly returned directly.
+                if value_type in ("object", "array"):
+                    assert isinstance(value, str)
+                    return json.loads(value)
+                return value
+
+        return await self.db_pool.runInteraction("get_profile_field", get_profile_field)
+
+    async def get_profile_fields(self, user_id: UserID) -> Dict[str, str]:
+        """
+        Get all custom profile fields for a user.
+
+        Args:
+            user_id: The user's ID.
+
+        Returns:
+            A dictionary of custom profile fields.
+        """
+        result = await self.db_pool.simple_select_one_onecol(
+            table="profiles",
+            keyvalues={"full_user_id": user_id.to_string()},
+            retcol="fields",
+            desc="get_profile_fields",
+        )
+        # The SQLite driver doesn't automatically convert JSON to
+        # Python objects
+        if isinstance(self.database_engine, Sqlite3Engine) and result:
+            result = json.loads(result)
+        return result or {}
+
     async def create_profile(self, user_id: UserID) -> None:
         """
         Create a blank profile for a user.
@@ -215,6 +307,71 @@ class ProfileWorkerStore(SQLBaseStore):
             desc="create_profile",
         )
 
+    def _check_profile_size(
+        self,
+        txn: LoggingTransaction,
+        user_id: UserID,
+        new_field_name: str,
+        new_value: JsonValue,
+    ) -> None:
+        # For each entry there are 4 quotes (2 each for key and value), 1 colon,
+        # and 1 comma.
+        PER_VALUE_EXTRA = 6
+
+        # Add the size of the current custom profile fields, ignoring the entry
+        # which will be overwritten.
+        if isinstance(txn.database_engine, PostgresEngine):
+            size_sql = """
+            SELECT
+                OCTET_LENGTH((fields - ?)::text), OCTET_LENGTH(displayname), OCTET_LENGTH(avatar_url)
+            FROM profiles
+            WHERE
+                user_id = ?
+            """
+            txn.execute(
+                size_sql,
+                (new_field_name, user_id.localpart),
+            )
+        else:
+            size_sql = """
+            SELECT
+                LENGTH(json_remove(fields, ?)), LENGTH(displayname), LENGTH(avatar_url)
+            FROM profiles
+            WHERE
+                user_id = ?
+            """
+            txn.execute(
+                size_sql,
+                # This will error if field_name has double quotes in it, but that's not
+                # possible due to the grammar.
+                (f'$."{new_field_name}"', user_id.localpart),
+            )
+        row = cast(Tuple[Optional[int], Optional[int], Optional[int]], txn.fetchone())
+
+        # The values return null if the column is null.
+        total_bytes = (
+            # Discount the opening and closing braces to avoid double counting,
+            # but add one for a comma.
+            # -2 + 1 = -1
+            (row[0] - 1 if row[0] else 0)
+            + (
+                row[1] + len("displayname") + PER_VALUE_EXTRA
+                if new_field_name != ProfileFields.DISPLAYNAME and row[1]
+                else 0
+            )
+            + (
+                row[2] + len("avatar_url") + PER_VALUE_EXTRA
+                if new_field_name != ProfileFields.AVATAR_URL and row[2]
+                else 0
+            )
+        )
+
+        # Add the length of the field being added + the braces.
+        total_bytes += len(encode_canonical_json({new_field_name: new_value}))
+
+        if total_bytes > MAX_PROFILE_SIZE:
+            raise StoreError(400, "Profile too large", Codes.PROFILE_TOO_LARGE)
+
     async def set_profile_displayname(
         self, user_id: UserID, new_displayname: Optional[str]
     ) -> None:
@@ -227,14 +384,25 @@ class ProfileWorkerStore(SQLBaseStore):
                 name is removed.
         """
         user_localpart = user_id.localpart
-        await self.db_pool.simple_upsert(
-            table="profiles",
-            keyvalues={"user_id": user_localpart},
-            values={
-                "displayname": new_displayname,
-                "full_user_id": user_id.to_string(),
-            },
-            desc="set_profile_displayname",
+
+        def set_profile_displayname(txn: LoggingTransaction) -> None:
+            if new_displayname is not None:
+                self._check_profile_size(
+                    txn, user_id, ProfileFields.DISPLAYNAME, new_displayname
+                )
+
+            self.db_pool.simple_upsert_txn(
+                txn,
+                table="profiles",
+                keyvalues={"user_id": user_localpart},
+                values={
+                    "displayname": new_displayname,
+                    "full_user_id": user_id.to_string(),
+                },
+            )
+
+        await self.db_pool.runInteraction(
+            "set_profile_displayname", set_profile_displayname
         )
 
     async def set_profile_avatar_url(
@@ -249,13 +417,125 @@ class ProfileWorkerStore(SQLBaseStore):
                 removed.
         """
         user_localpart = user_id.localpart
-        await self.db_pool.simple_upsert(
-            table="profiles",
-            keyvalues={"user_id": user_localpart},
-            values={"avatar_url": new_avatar_url, "full_user_id": user_id.to_string()},
-            desc="set_profile_avatar_url",
+
+        def set_profile_avatar_url(txn: LoggingTransaction) -> None:
+            if new_avatar_url is not None:
+                self._check_profile_size(
+                    txn, user_id, ProfileFields.AVATAR_URL, new_avatar_url
+                )
+
+            self.db_pool.simple_upsert_txn(
+                txn,
+                table="profiles",
+                keyvalues={"user_id": user_localpart},
+                values={
+                    "avatar_url": new_avatar_url,
+                    "full_user_id": user_id.to_string(),
+                },
+            )
+
+        await self.db_pool.runInteraction(
+            "set_profile_avatar_url", set_profile_avatar_url
         )
 
+    async def set_profile_field(
+        self, user_id: UserID, field_name: str, new_value: JsonValue
+    ) -> None:
+        """
+        Set a custom profile field for a user.
+
+        Args:
+            user_id: The user's ID.
+            field_name: The name of the custom profile field.
+            new_value: The value of the custom profile field.
+        """
+
+        # Encode to canonical JSON.
+        canonical_value = encode_canonical_json(new_value)
+
+        def set_profile_field(txn: LoggingTransaction) -> None:
+            self._check_profile_size(txn, user_id, field_name, new_value)
+
+            if isinstance(self.database_engine, PostgresEngine):
+                from psycopg2.extras import Json
+
+                # Note that the || jsonb operator is not recursive, any duplicate
+                # keys will be taken from the second value.
+                sql = """
+                INSERT INTO profiles (user_id, full_user_id, fields) VALUES (?, ?, JSON_BUILD_OBJECT(?, ?::jsonb))
+                ON CONFLICT (user_id)
+                DO UPDATE SET full_user_id = EXCLUDED.full_user_id, fields = COALESCE(profiles.fields, '{}'::jsonb) || EXCLUDED.fields
+                """
+
+                txn.execute(
+                    sql,
+                    (
+                        user_id.localpart,
+                        user_id.to_string(),
+                        field_name,
+                        # Pass as a JSON object since we have passing bytes disabled
+                        # at the database driver.
+                        Json(json.loads(canonical_value)),
+                    ),
+                )
+            else:
+                # You may be tempted to use json_patch instead of providing the parameters
+                # twice, but that recursively merges objects instead of replacing.
+                sql = """
+                INSERT INTO profiles (user_id, full_user_id, fields) VALUES (?, ?, JSON_OBJECT(?, JSON(?)))
+                ON CONFLICT (user_id)
+                DO UPDATE SET full_user_id = EXCLUDED.full_user_id, fields = JSON_SET(COALESCE(profiles.fields, '{}'), ?, JSON(?))
+                """
+                # This will error if field_name has double quotes in it, but that's not
+                # possible due to the grammar.
+                json_field_name = f'$."{field_name}"'
+
+                txn.execute(
+                    sql,
+                    (
+                        user_id.localpart,
+                        user_id.to_string(),
+                        json_field_name,
+                        canonical_value,
+                        json_field_name,
+                        canonical_value,
+                    ),
+                )
+
+        await self.db_pool.runInteraction("set_profile_field", set_profile_field)
+
+    async def delete_profile_field(self, user_id: UserID, field_name: str) -> None:
+        """
+        Remove a custom profile field for a user.
+
+        Args:
+            user_id: The user's ID.
+            field_name: The name of the custom profile field.
+        """
+
+        def delete_profile_field(txn: LoggingTransaction) -> None:
+            if isinstance(self.database_engine, PostgresEngine):
+                sql = """
+                UPDATE profiles SET fields = fields - ?
+                WHERE user_id = ?
+                """
+                txn.execute(
+                    sql,
+                    (field_name, user_id.localpart),
+                )
+            else:
+                sql = """
+                UPDATE profiles SET fields = json_remove(fields, ?)
+                WHERE user_id = ?
+                """
+                txn.execute(
+                    sql,
+                    # This will error if field_name has double quotes in it.
+                    (f'$."{field_name}"', user_id.localpart),
+                )
+
+        await self.db_pool.runInteraction("delete_profile_field", delete_profile_field)
+
 
 class ProfileStore(ProfileWorkerStore):
     pass
diff --git a/synapse/storage/databases/main/purge_events.py b/synapse/storage/databases/main/purge_events.py
index 08244153a3..ebdeb8fbd7 100644
--- a/synapse/storage/databases/main/purge_events.py
+++ b/synapse/storage/databases/main/purge_events.py
@@ -20,7 +20,7 @@
 #
 
 import logging
-from typing import Any, List, Set, Tuple, cast
+from typing import Any, Set, Tuple, cast
 
 from synapse.api.errors import SynapseError
 from synapse.storage.database import LoggingTransaction
@@ -332,7 +332,7 @@ class PurgeEventsStore(StateGroupWorkerStore, CacheInvalidationWorkerStore):
 
         return referenced_state_groups
 
-    async def purge_room(self, room_id: str) -> List[int]:
+    async def purge_room(self, room_id: str) -> None:
         """Deletes all record of a room
 
         Args:
@@ -348,7 +348,7 @@ class PurgeEventsStore(StateGroupWorkerStore, CacheInvalidationWorkerStore):
         # purge any of those rows which were added during the first.
 
         logger.info("[purge] Starting initial main purge of [1/2]")
-        state_groups_to_delete = await self.db_pool.runInteraction(
+        await self.db_pool.runInteraction(
             "purge_room",
             self._purge_room_txn,
             room_id=room_id,
@@ -356,18 +356,15 @@ class PurgeEventsStore(StateGroupWorkerStore, CacheInvalidationWorkerStore):
         )
 
         logger.info("[purge] Starting secondary main purge of [2/2]")
-        state_groups_to_delete.extend(
-            await self.db_pool.runInteraction(
-                "purge_room",
-                self._purge_room_txn,
-                room_id=room_id,
-            ),
+        await self.db_pool.runInteraction(
+            "purge_room",
+            self._purge_room_txn,
+            room_id=room_id,
         )
+
         logger.info("[purge] Done with main purge")
 
-        return state_groups_to_delete
-
-    def _purge_room_txn(self, txn: LoggingTransaction, room_id: str) -> List[int]:
+    def _purge_room_txn(self, txn: LoggingTransaction, room_id: str) -> None:
         # This collides with event persistence so we cannot write new events and metadata into
         # a room while deleting it or this transaction will fail.
         if isinstance(self.database_engine, PostgresEngine):
@@ -376,18 +373,10 @@ class PurgeEventsStore(StateGroupWorkerStore, CacheInvalidationWorkerStore):
                 (room_id,),
             )
 
-        # First, fetch all the state groups that should be deleted, before
-        # we delete that information.
-        txn.execute(
-            """
-                SELECT DISTINCT state_group FROM events
-                INNER JOIN event_to_state_groups USING(event_id)
-                WHERE events.room_id = ?
-            """,
-            (room_id,),
-        )
-
-        state_groups = [row[0] for row in txn]
+        if isinstance(self.database_engine, PostgresEngine):
+            # Disable statement timeouts for this transaction; purging rooms can
+            # take a while!
+            txn.execute("SET LOCAL statement_timeout = 0")
 
         # Get all the auth chains that are referenced by events that are to be
         # deleted.
@@ -508,5 +497,3 @@ class PurgeEventsStore(StateGroupWorkerStore, CacheInvalidationWorkerStore):
         #       periodically anyway (https://github.com/matrix-org/synapse/issues/5888)
 
         self._invalidate_caches_for_room_and_stream(txn, room_id)
-
-        return state_groups
diff --git a/synapse/storage/databases/main/registration.py b/synapse/storage/databases/main/registration.py
index d7cbe33411..8380930c70 100644
--- a/synapse/storage/databases/main/registration.py
+++ b/synapse/storage/databases/main/registration.py
@@ -1510,15 +1510,14 @@ class RegistrationWorkerStore(CacheInvalidationWorkerStore):
             # Override type because the return type is only optional if
             # allow_none is True, and we don't want mypy throwing errors
             # about None not being indexable.
-            pending, completed = cast(
-                Tuple[int, int],
-                self.db_pool.simple_select_one_txn(
-                    txn,
-                    "registration_tokens",
-                    keyvalues={"token": token},
-                    retcols=["pending", "completed"],
-                ),
+            row = self.db_pool.simple_select_one_txn(
+                txn,
+                "registration_tokens",
+                keyvalues={"token": token},
+                retcols=("pending", "completed"),
             )
+            pending = int(row[0])
+            completed = int(row[1])
 
             # Decrement pending and increment completed
             self.db_pool.simple_update_one_txn(
diff --git a/synapse/storage/databases/main/room.py b/synapse/storage/databases/main/room.py
index cc3ce0951e..d673adba16 100644
--- a/synapse/storage/databases/main/room.py
+++ b/synapse/storage/databases/main/room.py
@@ -1181,6 +1181,50 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
 
         return total_media_quarantined
 
+    async def block_room(self, room_id: str, user_id: str) -> None:
+        """Marks the room as blocked.
+
+        Can be called multiple times (though we'll only track the last user to
+        block this room).
+
+        Can be called on a room unknown to this homeserver.
+
+        Args:
+            room_id: Room to block
+            user_id: Who blocked it
+        """
+        await self.db_pool.simple_upsert(
+            table="blocked_rooms",
+            keyvalues={"room_id": room_id},
+            values={},
+            insertion_values={"user_id": user_id},
+            desc="block_room",
+        )
+        await self.db_pool.runInteraction(
+            "block_room_invalidation",
+            self._invalidate_cache_and_stream,
+            self.is_room_blocked,
+            (room_id,),
+        )
+
+    async def unblock_room(self, room_id: str) -> None:
+        """Remove the room from blocking list.
+
+        Args:
+            room_id: Room to unblock
+        """
+        await self.db_pool.simple_delete(
+            table="blocked_rooms",
+            keyvalues={"room_id": room_id},
+            desc="unblock_room",
+        )
+        await self.db_pool.runInteraction(
+            "block_room_invalidation",
+            self._invalidate_cache_and_stream,
+            self.is_room_blocked,
+            (room_id,),
+        )
+
     async def get_rooms_for_retention_period_in_range(
         self, min_ms: Optional[int], max_ms: Optional[int], include_null: bool = False
     ) -> Dict[str, RetentionPolicy]:
@@ -1586,6 +1630,7 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
         direction: Direction = Direction.BACKWARDS,
         user_id: Optional[str] = None,
         room_id: Optional[str] = None,
+        event_sender_user_id: Optional[str] = None,
     ) -> Tuple[List[Dict[str, Any]], int]:
         """Retrieve a paginated list of event reports
 
@@ -1596,6 +1641,8 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
                 oldest first (forwards)
             user_id: search for user_id. Ignored if user_id is None
             room_id: search for room_id. Ignored if room_id is None
+                event_sender_user_id: search for the sender of the reported event. Ignored if
+                event_sender_user_id is None
         Returns:
             Tuple of:
                 json list of event reports
@@ -1615,6 +1662,10 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
                 filters.append("er.room_id LIKE ?")
                 args.extend(["%" + room_id + "%"])
 
+            if event_sender_user_id:
+                filters.append("events.sender = ?")
+                args.extend([event_sender_user_id])
+
             if direction == Direction.BACKWARDS:
                 order = "DESC"
             else:
@@ -1630,6 +1681,7 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
             sql = """
                 SELECT COUNT(*) as total_event_reports
                 FROM event_reports AS er
+                LEFT JOIN events USING(event_id)
                 JOIN room_stats_state ON room_stats_state.room_id = er.room_id
                 {}
                 """.format(where_clause)
@@ -1648,8 +1700,7 @@ class RoomWorkerStore(CacheInvalidationWorkerStore):
                     room_stats_state.canonical_alias,
                     room_stats_state.name
                 FROM event_reports AS er
-                LEFT JOIN events
-                    ON events.event_id = er.event_id
+                LEFT JOIN events USING(event_id)
                 JOIN room_stats_state
                     ON room_stats_state.room_id = er.room_id
                 {where_clause}
@@ -2493,50 +2544,6 @@ class RoomStore(RoomBackgroundUpdateStore, RoomWorkerStore):
         )
         return next_id
 
-    async def block_room(self, room_id: str, user_id: str) -> None:
-        """Marks the room as blocked.
-
-        Can be called multiple times (though we'll only track the last user to
-        block this room).
-
-        Can be called on a room unknown to this homeserver.
-
-        Args:
-            room_id: Room to block
-            user_id: Who blocked it
-        """
-        await self.db_pool.simple_upsert(
-            table="blocked_rooms",
-            keyvalues={"room_id": room_id},
-            values={},
-            insertion_values={"user_id": user_id},
-            desc="block_room",
-        )
-        await self.db_pool.runInteraction(
-            "block_room_invalidation",
-            self._invalidate_cache_and_stream,
-            self.is_room_blocked,
-            (room_id,),
-        )
-
-    async def unblock_room(self, room_id: str) -> None:
-        """Remove the room from blocking list.
-
-        Args:
-            room_id: Room to unblock
-        """
-        await self.db_pool.simple_delete(
-            table="blocked_rooms",
-            keyvalues={"room_id": room_id},
-            desc="unblock_room",
-        )
-        await self.db_pool.runInteraction(
-            "block_room_invalidation",
-            self._invalidate_cache_and_stream,
-            self.is_room_blocked,
-            (room_id,),
-        )
-
     async def clear_partial_state_room(self, room_id: str) -> Optional[int]:
         """Clears the partial state flag for a room.
 
diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py
index 4249cf77e5..a0a6dcd04e 100644
--- a/synapse/storage/databases/main/roommember.py
+++ b/synapse/storage/databases/main/roommember.py
@@ -79,6 +79,7 @@ logger = logging.getLogger(__name__)
 
 _MEMBERSHIP_PROFILE_UPDATE_NAME = "room_membership_profile_update"
 _CURRENT_STATE_MEMBERSHIP_UPDATE_NAME = "current_state_events_membership"
+_POPULATE_PARTICIPANT_BG_UPDATE_BATCH_SIZE = 1000
 
 
 @attr.s(frozen=True, slots=True, auto_attribs=True)
@@ -1572,6 +1573,100 @@ class RoomMemberWorkerStore(EventsWorkerStore, CacheInvalidationWorkerStore):
             get_sliding_sync_room_for_user_batch_txn,
         )
 
+    async def get_rooms_for_user_by_date(
+        self, user_id: str, from_ts: int
+    ) -> FrozenSet[str]:
+        """
+        Fetch a list of rooms that the user has joined at or after the given timestamp, including
+        those they subsequently have left/been banned from.
+
+        Args:
+            user_id: user ID of the user to search for
+            from_ts: a timestamp in ms from the unix epoch at which to begin the search at
+        """
+
+        def _get_rooms_for_user_by_join_date_txn(
+            txn: LoggingTransaction, user_id: str, timestamp: int
+        ) -> frozenset:
+            sql = """
+                SELECT rm.room_id
+                FROM room_memberships AS rm
+                INNER JOIN events AS e USING (event_id)
+                WHERE rm.user_id = ?
+                    AND rm.membership = 'join'
+                    AND e.type = 'm.room.member'
+                    AND e.received_ts >= ?
+            """
+            txn.execute(sql, (user_id, timestamp))
+            return frozenset([r[0] for r in txn])
+
+        return await self.db_pool.runInteraction(
+            "_get_rooms_for_user_by_join_date_txn",
+            _get_rooms_for_user_by_join_date_txn,
+            user_id,
+            from_ts,
+        )
+
+    async def set_room_participation(self, user_id: str, room_id: str) -> None:
+        """
+        Record the provided user as participating in the given room
+
+        Args:
+            user_id: the user ID of the user
+            room_id: ID of the room to set the participant in
+        """
+
+        def _set_room_participation_txn(
+            txn: LoggingTransaction, user_id: str, room_id: str
+        ) -> None:
+            sql = """
+                UPDATE room_memberships
+                SET participant = true
+                WHERE (user_id, room_id) IN (
+                    SELECT user_id, room_id
+                    FROM room_memberships
+                    WHERE user_id = ?
+                    AND room_id = ?
+                    ORDER BY event_stream_ordering DESC
+                    LIMIT 1
+                )
+            """
+            txn.execute(sql, (user_id, room_id))
+
+        await self.db_pool.runInteraction(
+            "_set_room_participation_txn", _set_room_participation_txn, user_id, room_id
+        )
+
+    async def get_room_participation(self, user_id: str, room_id: str) -> bool:
+        """
+        Check whether a user is listed as a participant in a room
+
+        Args:
+            user_id: user ID of the user
+            room_id: ID of the room to check in
+        """
+
+        def _get_room_participation_txn(
+            txn: LoggingTransaction, user_id: str, room_id: str
+        ) -> bool:
+            sql = """
+                SELECT participant
+                FROM room_memberships
+                WHERE user_id = ?
+                AND room_id = ?
+                ORDER BY event_stream_ordering DESC
+                LIMIT 1
+            """
+            txn.execute(sql, (user_id, room_id))
+            res = txn.fetchone()
+            if res:
+                return res[0]
+            return False
+
+        return await self.db_pool.runInteraction(
+            "_get_room_participation_txn", _get_room_participation_txn, user_id, room_id
+        )
+
 
 class RoomMemberBackgroundUpdateStore(SQLBaseStore):
     def __init__(
@@ -1602,6 +1697,93 @@ class RoomMemberBackgroundUpdateStore(SQLBaseStore):
             columns=["user_id", "room_id"],
         )
 
+        self.db_pool.updates.register_background_update_handler(
+            "populate_participant_bg_update", self._populate_participant
+        )
+
+    async def _populate_participant(self, progress: JsonDict, batch_size: int) -> int:
+        """
+        Background update to populate column `participant` on `room_memberships` table
+
+        A 'participant' is someone who is currently joined to a room and has sent at least
+        one `m.room.message` or `m.room.encrypted` event.
+
+        This background update will set the `participant` column across all rows in
+        `room_memberships` based on the user's *current* join status, and if
+        they've *ever* sent a message or encrypted event. Therefore one should
+        never assume the `participant` column's value is based solely on whether
+        the user participated in a previous "session" (where a "session" is defined
+        as a period between the user joining and leaving). See
+        https://github.com/element-hq/synapse/pull/18068#discussion_r1931070291
+        for further detail.
+        """
+        stream_token = progress.get("last_stream_token", None)
+
+        def _get_max_stream_token_txn(txn: LoggingTransaction) -> int:
+            sql = """
+                SELECT event_stream_ordering from room_memberships
+                ORDER BY event_stream_ordering DESC
+                LIMIT 1;
+            """
+            txn.execute(sql)
+            res = txn.fetchone()
+            if not res or not res[0]:
+                return 0
+            return res[0]
+
+        def _background_populate_participant_txn(
+            txn: LoggingTransaction, stream_token: str
+        ) -> None:
+            sql = """
+                UPDATE room_memberships
+                SET participant = True
+                FROM (
+                    SELECT DISTINCT c.state_key, e.room_id
+                    FROM current_state_events AS c
+                    INNER JOIN events AS e ON c.room_id = e.room_id
+                    WHERE c.membership = 'join'
+                        AND c.state_key = e.sender
+                        AND (
+                            e.type = 'm.room.message'
+                            OR e.type = 'm.room.encrypted'
+                        )
+                ) AS subquery
+                WHERE room_memberships.user_id = subquery.state_key
+                    AND room_memberships.room_id = subquery.room_id
+                    AND room_memberships.event_stream_ordering <= ?
+                    AND room_memberships.event_stream_ordering > ?;
+            """
+            batch = int(stream_token) - _POPULATE_PARTICIPANT_BG_UPDATE_BATCH_SIZE
+            txn.execute(sql, (stream_token, batch))
+
+        if stream_token is None:
+            stream_token = await self.db_pool.runInteraction(
+                "_get_max_stream_token", _get_max_stream_token_txn
+            )
+
+        if stream_token < 0:
+            await self.db_pool.updates._end_background_update(
+                "populate_participant_bg_update"
+            )
+            return _POPULATE_PARTICIPANT_BG_UPDATE_BATCH_SIZE
+
+        await self.db_pool.runInteraction(
+            "_background_populate_participant_txn",
+            _background_populate_participant_txn,
+            stream_token,
+        )
+
+        progress["last_stream_token"] = (
+            stream_token - _POPULATE_PARTICIPANT_BG_UPDATE_BATCH_SIZE
+        )
+        await self.db_pool.runInteraction(
+            "populate_participant_bg_update",
+            self.db_pool.updates._background_update_progress_txn,
+            "populate_participant_bg_update",
+            progress,
+        )
+        return _POPULATE_PARTICIPANT_BG_UPDATE_BATCH_SIZE
+
     async def _background_add_membership_profile(
         self, progress: JsonDict, batch_size: int
     ) -> int:
diff --git a/synapse/storage/databases/main/sliding_sync.py b/synapse/storage/databases/main/sliding_sync.py
index 874dfdcb77..a287fd2a3f 100644
--- a/synapse/storage/databases/main/sliding_sync.py
+++ b/synapse/storage/databases/main/sliding_sync.py
@@ -1,7 +1,7 @@
 #
 # This file is licensed under the Affero General Public License (AGPL) version 3.
 #
-# Copyright (C) 2023 New Vector, Ltd
+# Copyright (C) 2023, 2025 New Vector, Ltd
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -61,6 +61,13 @@ class SlidingSyncStore(SQLBaseStore):
             columns=("required_state_id",),
         )
 
+        self.db_pool.updates.register_background_index_update(
+            update_name="sliding_sync_membership_snapshots_membership_event_id_idx",
+            index_name="sliding_sync_membership_snapshots_membership_event_id_idx",
+            table="sliding_sync_membership_snapshots",
+            columns=("membership_event_id",),
+        )
+
     async def get_latest_bump_stamp_for_room(
         self,
         room_id: str,
diff --git a/synapse/storage/databases/main/stream.py b/synapse/storage/databases/main/stream.py
index b4258a4436..00e5208674 100644
--- a/synapse/storage/databases/main/stream.py
+++ b/synapse/storage/databases/main/stream.py
@@ -50,6 +50,7 @@ from typing import (
     Dict,
     Iterable,
     List,
+    Literal,
     Mapping,
     Optional,
     Protocol,
@@ -61,7 +62,7 @@ from typing import (
 
 import attr
 from immutabledict import immutabledict
-from typing_extensions import Literal, assert_never
+from typing_extensions import assert_never
 
 from twisted.internet import defer
 
@@ -1837,15 +1838,14 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore):
             dict
         """
 
-        stream_ordering, topological_ordering = cast(
-            Tuple[int, int],
-            self.db_pool.simple_select_one_txn(
-                txn,
-                "events",
-                keyvalues={"event_id": event_id, "room_id": room_id},
-                retcols=["stream_ordering", "topological_ordering"],
-            ),
+        row = self.db_pool.simple_select_one_txn(
+            txn,
+            "events",
+            keyvalues={"event_id": event_id, "room_id": room_id},
+            retcols=("stream_ordering", "topological_ordering"),
         )
+        stream_ordering = int(row[0])
+        topological_ordering = int(row[1])
 
         # Paginating backwards includes the event at the token, but paginating
         # forward doesn't.
diff --git a/synapse/storage/databases/main/user_directory.py b/synapse/storage/databases/main/user_directory.py
index 51cffb0986..d6cd0774a8 100644
--- a/synapse/storage/databases/main/user_directory.py
+++ b/synapse/storage/databases/main/user_directory.py
@@ -31,6 +31,7 @@ from typing import (
     Sequence,
     Set,
     Tuple,
+    TypedDict,
     cast,
 )
 
@@ -44,8 +45,6 @@ try:
 except ModuleNotFoundError:
     USE_ICU = False
 
-from typing_extensions import TypedDict
-
 from synapse.api.errors import StoreError
 from synapse.util.stringutils import non_null_str_or_none
 
@@ -1238,7 +1237,13 @@ def _parse_query_postgres(search_term: str) -> Tuple[str, str, str]:
     search_term = _filter_text_for_index(search_term)
 
     escaped_words = []
-    for word in _parse_words(search_term):
+    for index, word in enumerate(_parse_words(search_term)):
+        if index >= 10:
+            # We limit how many terms we include, as otherwise it can use
+            # excessive database time if people accidentally search for large
+            # strings.
+            break
+
         # Postgres tsvector and tsquery quoting rules:
         # words potentially containing punctuation should be quoted
         # and then existing quotes and backslashes should be doubled
diff --git a/synapse/storage/databases/state/bg_updates.py b/synapse/storage/databases/state/bg_updates.py
index f7824cba0f..95fd0ae73a 100644
--- a/synapse/storage/databases/state/bg_updates.py
+++ b/synapse/storage/databases/state/bg_updates.py
@@ -20,7 +20,15 @@
 #
 
 import logging
-from typing import TYPE_CHECKING, Dict, List, Mapping, Optional, Tuple, Union
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    List,
+    Mapping,
+    Optional,
+    Tuple,
+    Union,
+)
 
 from synapse.logging.opentracing import tag_args, trace
 from synapse.storage._base import SQLBaseStore
diff --git a/synapse/storage/databases/state/deletion.py b/synapse/storage/databases/state/deletion.py
new file mode 100644
index 0000000000..f77c46f6ae
--- /dev/null
+++ b/synapse/storage/databases/state/deletion.py
@@ -0,0 +1,561 @@
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright (C) 2025 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+
+
+import contextlib
+from typing import (
+    TYPE_CHECKING,
+    AbstractSet,
+    AsyncIterator,
+    Collection,
+    Mapping,
+    Optional,
+    Set,
+    Tuple,
+)
+
+from synapse.events import EventBase
+from synapse.events.snapshot import EventContext
+from synapse.storage.database import (
+    DatabasePool,
+    LoggingDatabaseConnection,
+    LoggingTransaction,
+    make_in_list_sql_clause,
+)
+from synapse.storage.engines import PostgresEngine
+from synapse.util.stringutils import shortstr
+
+if TYPE_CHECKING:
+    from synapse.server import HomeServer
+
+
+class StateDeletionDataStore:
+    """Manages deletion of state groups in a safe manner.
+
+    Deleting state groups is challenging as before we actually delete them we
+    need to ensure that there are no in-flight events that refer to the state
+    groups that we want to delete.
+
+    To handle this, we take two approaches. First, before we persist any event
+    we ensure that the state group still exists and mark in the
+    `state_groups_persisting` table that the state group is about to be used.
+    (Note that we have to have the extra table here as state groups and events
+    can be in different databases, and thus we can't check for the existence of
+    state groups in the persist event transaction). Once the event has been
+    persisted, we can remove the row from  `state_groups_persisting`. So long as
+    we check that table before deleting state groups, we can ensure that we
+    never persist events that reference deleted state groups, maintaining
+    database integrity.
+
+    However, we want to avoid throwing exceptions so deep in the process of
+    persisting events. So instead of deleting state groups immediately, we mark
+    them as pending/proposed for deletion and wait for a certain amount of time
+    before performing the deletion. When we come to handle new events that
+    reference state groups, we check if they are pending deletion and bump the
+    time for when they'll be deleted (to give a chance for the event to be
+    persisted, or not).
+
+    When deleting, we need to check that state groups remain unreferenced. There
+    is a race here where we a) fetch state groups that are ready for deletion,
+    b) check they're unreferenced, c) the state group becomes referenced but
+    then gets marked as pending deletion again, d) during the deletion
+    transaction we recheck `state_groups_pending_deletion` table again and see
+    that it exists and so continue with the deletion. To prevent this from
+    happening we add a `sequence_number` column to
+    `state_groups_pending_deletion`, and during deletion we ensure that for a
+    state group we're about to delete that the sequence number doesn't change
+    between steps (a) and (d). So long as we always bump the sequence number
+    whenever an event may become used the race can never happen.
+    """
+
+    # How long to wait before we delete state groups. This should be long enough
+    # for any in-flight events to be persisted. If events take longer to persist
+    # and any of the state groups they reference have been deleted, then the
+    # event will fail to persist (as well as any event in the same batch).
+    DELAY_BEFORE_DELETION_MS = 10 * 60 * 1000
+
+    def __init__(
+        self,
+        database: DatabasePool,
+        db_conn: LoggingDatabaseConnection,
+        hs: "HomeServer",
+    ):
+        self._clock = hs.get_clock()
+        self.db_pool = database
+        self._instance_name = hs.get_instance_name()
+
+        with db_conn.cursor(txn_name="_clear_existing_persising") as txn:
+            self._clear_existing_persising(txn)
+
+    def _clear_existing_persising(self, txn: LoggingTransaction) -> None:
+        """On startup we clear any entries in `state_groups_persisting` that
+        match our instance name, in case of a previous unclean shutdown"""
+
+        self.db_pool.simple_delete_txn(
+            txn,
+            table="state_groups_persisting",
+            keyvalues={"instance_name": self._instance_name},
+        )
+
+    async def check_state_groups_and_bump_deletion(
+        self, state_groups: AbstractSet[int]
+    ) -> Collection[int]:
+        """Checks to make sure that the state groups haven't been deleted, and
+        if they're pending deletion we delay it (allowing time for any event
+        that will use them to finish persisting).
+
+        Returns:
+            The state groups that are missing, if any.
+        """
+
+        return await self.db_pool.runInteraction(
+            "check_state_groups_and_bump_deletion",
+            self._check_state_groups_and_bump_deletion_txn,
+            state_groups,
+            # We don't need to lock if we're just doing a quick check, as the
+            # lock doesn't prevent any races here.
+            lock=False,
+        )
+
+    def _check_state_groups_and_bump_deletion_txn(
+        self, txn: LoggingTransaction, state_groups: AbstractSet[int], lock: bool = True
+    ) -> Collection[int]:
+        """Checks to make sure that the state groups haven't been deleted, and
+        if they're pending deletion we delay it (allowing time for any event
+        that will use them to finish persisting).
+
+        The `lock` flag sets if we should lock the `state_group` rows we're
+        checking, which we should do when storing new groups.
+
+        Returns:
+            The state groups that are missing, if any.
+        """
+
+        existing_state_groups = self._get_existing_groups_with_lock(
+            txn, state_groups, lock=lock
+        )
+
+        self._bump_deletion_txn(txn, existing_state_groups)
+
+        missing_state_groups = state_groups - existing_state_groups
+        if missing_state_groups:
+            return missing_state_groups
+
+        return ()
+
+    def _bump_deletion_txn(
+        self, txn: LoggingTransaction, state_groups: Collection[int]
+    ) -> None:
+        """Update any pending deletions of the state group that they may now be
+        referenced."""
+
+        if not state_groups:
+            return
+
+        now = self._clock.time_msec()
+        if isinstance(self.db_pool.engine, PostgresEngine):
+            clause, args = make_in_list_sql_clause(
+                self.db_pool.engine, "state_group", state_groups
+            )
+            sql = f"""
+                UPDATE state_groups_pending_deletion
+                SET sequence_number = DEFAULT, insertion_ts = ?
+                WHERE {clause}
+            """
+            args.insert(0, now)
+            txn.execute(sql, args)
+        else:
+            rows = self.db_pool.simple_select_many_txn(
+                txn,
+                table="state_groups_pending_deletion",
+                column="state_group",
+                iterable=state_groups,
+                keyvalues={},
+                retcols=("state_group",),
+            )
+            if not rows:
+                return
+
+            state_groups_to_update = [state_group for (state_group,) in rows]
+
+            self.db_pool.simple_delete_many_txn(
+                txn,
+                table="state_groups_pending_deletion",
+                column="state_group",
+                values=state_groups_to_update,
+                keyvalues={},
+            )
+            self.db_pool.simple_insert_many_txn(
+                txn,
+                table="state_groups_pending_deletion",
+                keys=("state_group", "insertion_ts"),
+                values=[(state_group, now) for state_group in state_groups_to_update],
+            )
+
+    def _get_existing_groups_with_lock(
+        self, txn: LoggingTransaction, state_groups: Collection[int], lock: bool = True
+    ) -> AbstractSet[int]:
+        """Return which of the given state groups are in the database, and locks
+        those rows with `KEY SHARE` to ensure they don't get concurrently
+        deleted (if `lock` is true)."""
+        clause, args = make_in_list_sql_clause(self.db_pool.engine, "id", state_groups)
+
+        sql = f"""
+            SELECT id FROM state_groups
+            WHERE {clause}
+        """
+        if lock and isinstance(self.db_pool.engine, PostgresEngine):
+            # On postgres we add a row level lock to the rows to ensure that we
+            # conflict with any concurrent DELETEs. `FOR KEY SHARE` lock will
+            # not conflict with other read
+            sql += """
+            FOR KEY SHARE
+            """
+
+        txn.execute(sql, args)
+        return {state_group for (state_group,) in txn}
+
+    @contextlib.asynccontextmanager
+    async def persisting_state_group_references(
+        self, event_and_contexts: Collection[Tuple[EventBase, EventContext]]
+    ) -> AsyncIterator[None]:
+        """Wraps the persistence of the given events and contexts, ensuring that
+        any state groups referenced still exist and that they don't get deleted
+        during this."""
+
+        referenced_state_groups: Set[int] = set()
+        for event, ctx in event_and_contexts:
+            if ctx.rejected or event.internal_metadata.is_outlier():
+                continue
+
+            assert ctx.state_group is not None
+
+            referenced_state_groups.add(ctx.state_group)
+
+            if ctx.state_group_before_event:
+                referenced_state_groups.add(ctx.state_group_before_event)
+
+        if not referenced_state_groups:
+            # We don't reference any state groups, so nothing to do
+            yield
+            return
+
+        await self.db_pool.runInteraction(
+            "mark_state_groups_as_persisting",
+            self._mark_state_groups_as_persisting_txn,
+            referenced_state_groups,
+        )
+
+        error = True
+        try:
+            yield None
+            error = False
+        finally:
+            await self.db_pool.runInteraction(
+                "finish_persisting",
+                self._finish_persisting_txn,
+                referenced_state_groups,
+                error=error,
+            )
+
+    def _mark_state_groups_as_persisting_txn(
+        self, txn: LoggingTransaction, state_groups: Set[int]
+    ) -> None:
+        """Marks the given state groups as being persisted."""
+
+        existing_state_groups = self._get_existing_groups_with_lock(txn, state_groups)
+        missing_state_groups = state_groups - existing_state_groups
+        if missing_state_groups:
+            raise Exception(
+                f"state groups have been deleted: {shortstr(missing_state_groups)}"
+            )
+
+        self.db_pool.simple_insert_many_txn(
+            txn,
+            table="state_groups_persisting",
+            keys=("state_group", "instance_name"),
+            values=[(state_group, self._instance_name) for state_group in state_groups],
+        )
+
+    def _finish_persisting_txn(
+        self, txn: LoggingTransaction, state_groups: Collection[int], error: bool
+    ) -> None:
+        """Mark the state groups as having finished persistence.
+
+        If `error` is true then we assume the state groups were not persisted,
+        and so we do not clear them from the pending deletion table.
+        """
+        self.db_pool.simple_delete_many_txn(
+            txn,
+            table="state_groups_persisting",
+            column="state_group",
+            values=state_groups,
+            keyvalues={"instance_name": self._instance_name},
+        )
+
+        if error:
+            # The state groups may or may not have been persisted, so we need to
+            # bump the deletion to ensure we recheck if they have become
+            # referenced.
+            self._bump_deletion_txn(txn, state_groups)
+            return
+
+        self.db_pool.simple_delete_many_batch_txn(
+            txn,
+            table="state_groups_pending_deletion",
+            keys=("state_group",),
+            values=[(state_group,) for state_group in state_groups],
+        )
+
+    async def mark_state_groups_as_pending_deletion(
+        self, state_groups: Collection[int]
+    ) -> None:
+        """Mark the given state groups as pending deletion.
+
+        If any of the state groups are already pending deletion, then those records are
+        left as is.
+        """
+
+        await self.db_pool.runInteraction(
+            "mark_state_groups_as_pending_deletion",
+            self._mark_state_groups_as_pending_deletion_txn,
+            state_groups,
+        )
+
+    def _mark_state_groups_as_pending_deletion_txn(
+        self,
+        txn: LoggingTransaction,
+        state_groups: Collection[int],
+    ) -> None:
+        sql = """
+        INSERT INTO state_groups_pending_deletion (state_group, insertion_ts)
+        VALUES %s
+        ON CONFLICT (state_group)
+        DO NOTHING
+        """
+
+        now = self._clock.time_msec()
+        rows = [
+            (
+                state_group,
+                now,
+            )
+            for state_group in state_groups
+        ]
+        if isinstance(txn.database_engine, PostgresEngine):
+            txn.execute_values(sql % ("?",), rows, fetch=False)
+        else:
+            txn.execute_batch(sql % ("(?, ?)",), rows)
+
+    async def mark_state_groups_as_used(self, state_groups: Collection[int]) -> None:
+        """Mark the given state groups as now being referenced"""
+
+        await self.db_pool.simple_delete_many(
+            table="state_groups_pending_deletion",
+            column="state_group",
+            iterable=state_groups,
+            keyvalues={},
+            desc="mark_state_groups_as_used",
+        )
+
+    async def get_pending_deletions(
+        self, state_groups: Collection[int]
+    ) -> Mapping[int, int]:
+        """Get which state groups are pending deletion.
+
+        Returns:
+            a mapping from state groups that are pending deletion to their
+            sequence number
+        """
+
+        rows = await self.db_pool.simple_select_many_batch(
+            table="state_groups_pending_deletion",
+            column="state_group",
+            iterable=state_groups,
+            retcols=("state_group", "sequence_number"),
+            keyvalues={},
+            desc="get_pending_deletions",
+        )
+
+        return dict(rows)
+
+    def get_state_groups_ready_for_potential_deletion_txn(
+        self,
+        txn: LoggingTransaction,
+        state_groups_to_sequence_numbers: Mapping[int, int],
+    ) -> Collection[int]:
+        """Given a set of state groups, return which state groups can
+        potentially be deleted.
+
+        The state groups must have been checked to see if they remain
+        unreferenced before calling this function.
+
+        Note: This must be called within the same transaction that the state
+        groups are deleted.
+
+        Args:
+            state_groups_to_sequence_numbers: The state groups, and the sequence
+                numbers from before the state groups were checked to see if they
+                were unreferenced.
+
+        Returns:
+            The subset of state groups that can safely be deleted
+
+        """
+
+        if not state_groups_to_sequence_numbers:
+            return state_groups_to_sequence_numbers
+
+        if isinstance(self.db_pool.engine, PostgresEngine):
+            # On postgres we want to lock the rows FOR UPDATE as early as
+            # possible to help conflicts.
+            clause, args = make_in_list_sql_clause(
+                self.db_pool.engine, "id", state_groups_to_sequence_numbers
+            )
+            sql = f"""
+                SELECT id FROM state_groups
+                WHERE {clause}
+                FOR UPDATE
+            """
+            txn.execute(sql, args)
+
+        # Check the deletion status in the DB of the given state groups
+        clause, args = make_in_list_sql_clause(
+            self.db_pool.engine,
+            column="state_group",
+            iterable=state_groups_to_sequence_numbers,
+        )
+
+        sql = f"""
+            SELECT state_group, insertion_ts, sequence_number FROM (
+                SELECT state_group, insertion_ts, sequence_number FROM state_groups_pending_deletion
+                UNION
+                SELECT state_group, null, null FROM state_groups_persisting
+            ) AS s
+            WHERE {clause}
+        """
+
+        txn.execute(sql, args)
+
+        # The above query will return potentially two rows per state group (one
+        # for each table), so we track which state groups have enough time
+        # elapsed and which are not ready to be persisted.
+        ready_to_be_deleted = set()
+        not_ready_to_be_deleted = set()
+
+        now = self._clock.time_msec()
+        for state_group, insertion_ts, sequence_number in txn:
+            if insertion_ts is None:
+                # A null insertion_ts means that we are currently persisting
+                # events that reference the state group, so we don't delete
+                # them.
+                not_ready_to_be_deleted.add(state_group)
+                continue
+
+            # We know this can't be None if insertion_ts is not None
+            assert sequence_number is not None
+
+            # Check if the sequence number has changed, if it has then it
+            # indicates that the state group may have become referenced since we
+            # checked.
+            if state_groups_to_sequence_numbers[state_group] != sequence_number:
+                not_ready_to_be_deleted.add(state_group)
+                continue
+
+            if now - insertion_ts < self.DELAY_BEFORE_DELETION_MS:
+                # Not enough time has elapsed to allow us to delete.
+                not_ready_to_be_deleted.add(state_group)
+                continue
+
+            ready_to_be_deleted.add(state_group)
+
+        can_be_deleted = ready_to_be_deleted - not_ready_to_be_deleted
+        if not_ready_to_be_deleted:
+            # If there are any state groups that aren't ready to be deleted,
+            # then we also need to remove any state groups that are referenced
+            # by them.
+            clause, args = make_in_list_sql_clause(
+                self.db_pool.engine,
+                column="state_group",
+                iterable=state_groups_to_sequence_numbers,
+            )
+            sql = f"""
+                WITH RECURSIVE ancestors(state_group) AS (
+                    SELECT DISTINCT prev_state_group
+                    FROM state_group_edges WHERE {clause}
+                    UNION
+                    SELECT prev_state_group
+                    FROM state_group_edges
+                    INNER JOIN ancestors USING (state_group)
+                )
+                SELECT state_group FROM ancestors
+            """
+            txn.execute(sql, args)
+
+            can_be_deleted.difference_update(state_group for (state_group,) in txn)
+
+        return can_be_deleted
+
+    async def get_next_state_group_collection_to_delete(
+        self,
+    ) -> Optional[Tuple[str, Mapping[int, int]]]:
+        """Get the next set of state groups to try and delete
+
+        Returns:
+            2-tuple of room_id and mapping of state groups to sequence number.
+        """
+        return await self.db_pool.runInteraction(
+            "get_next_state_group_collection_to_delete",
+            self._get_next_state_group_collection_to_delete_txn,
+        )
+
+    def _get_next_state_group_collection_to_delete_txn(
+        self,
+        txn: LoggingTransaction,
+    ) -> Optional[Tuple[str, Mapping[int, int]]]:
+        """Implementation of `get_next_state_group_collection_to_delete`"""
+
+        # We want to return chunks of state groups that were marked for deletion
+        # at the same time (this isn't necessary, just more efficient). We do
+        # this by looking for the oldest insertion_ts, and then pulling out all
+        # rows that have the same insertion_ts (and room ID).
+        now = self._clock.time_msec()
+
+        sql = """
+            SELECT room_id, insertion_ts
+            FROM state_groups_pending_deletion AS sd
+            INNER JOIN state_groups AS sg ON (id = sd.state_group)
+            LEFT JOIN state_groups_persisting AS sp USING (state_group)
+            WHERE insertion_ts < ? AND sp.state_group IS NULL
+            ORDER BY insertion_ts
+            LIMIT 1
+        """
+        txn.execute(sql, (now - self.DELAY_BEFORE_DELETION_MS,))
+        row = txn.fetchone()
+        if not row:
+            return None
+
+        (room_id, insertion_ts) = row
+
+        sql = """
+            SELECT state_group, sequence_number
+            FROM state_groups_pending_deletion AS sd
+            INNER JOIN state_groups AS sg ON (id = sd.state_group)
+            LEFT JOIN state_groups_persisting AS sp USING (state_group)
+            WHERE room_id = ? AND insertion_ts = ? AND sp.state_group IS NULL
+            ORDER BY insertion_ts
+        """
+        txn.execute(sql, (room_id, insertion_ts))
+
+        return room_id, dict(txn)
diff --git a/synapse/storage/databases/state/store.py b/synapse/storage/databases/state/store.py
index f7a59c8992..90d7beb92f 100644
--- a/synapse/storage/databases/state/store.py
+++ b/synapse/storage/databases/state/store.py
@@ -22,10 +22,10 @@
 import logging
 from typing import (
     TYPE_CHECKING,
-    Collection,
     Dict,
     Iterable,
     List,
+    Mapping,
     Optional,
     Set,
     Tuple,
@@ -36,7 +36,10 @@ import attr
 
 from synapse.api.constants import EventTypes
 from synapse.events import EventBase
-from synapse.events.snapshot import UnpersistedEventContext, UnpersistedEventContextBase
+from synapse.events.snapshot import (
+    UnpersistedEventContext,
+    UnpersistedEventContextBase,
+)
 from synapse.logging.opentracing import tag_args, trace
 from synapse.storage._base import SQLBaseStore
 from synapse.storage.database import (
@@ -55,6 +58,7 @@ from synapse.util.cancellation import cancellable
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
+    from synapse.storage.databases.state.deletion import StateDeletionDataStore
 
 logger = logging.getLogger(__name__)
 
@@ -83,8 +87,10 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
         database: DatabasePool,
         db_conn: LoggingDatabaseConnection,
         hs: "HomeServer",
+        state_deletion_store: "StateDeletionDataStore",
     ):
         super().__init__(database, db_conn, hs)
+        self._state_deletion_store = state_deletion_store
 
         # Originally the state store used a single DictionaryCache to cache the
         # event IDs for the state types in a given state group to avoid hammering
@@ -467,14 +473,15 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
             Returns:
                 A list of state groups
             """
-            is_in_db = self.db_pool.simple_select_one_onecol_txn(
-                txn,
-                table="state_groups",
-                keyvalues={"id": prev_group},
-                retcol="id",
-                allow_none=True,
+
+            # We need to check that the prev group isn't about to be deleted
+            is_missing = (
+                self._state_deletion_store._check_state_groups_and_bump_deletion_txn(
+                    txn,
+                    {prev_group},
+                )
             )
-            if not is_in_db:
+            if is_missing:
                 raise Exception(
                     "Trying to persist state with unpersisted prev_group: %r"
                     % (prev_group,)
@@ -546,6 +553,7 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
                     for key, state_id in context.state_delta_due_to_event.items()
                 ],
             )
+
             return events_and_context
 
         return await self.db_pool.runInteraction(
@@ -601,14 +609,15 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
                 The state group if successfully created, or None if the state
                 needs to be persisted as a full state.
             """
-            is_in_db = self.db_pool.simple_select_one_onecol_txn(
-                txn,
-                table="state_groups",
-                keyvalues={"id": prev_group},
-                retcol="id",
-                allow_none=True,
+
+            # We need to check that the prev group isn't about to be deleted
+            is_missing = (
+                self._state_deletion_store._check_state_groups_and_bump_deletion_txn(
+                    txn,
+                    {prev_group},
+                )
             )
-            if not is_in_db:
+            if is_missing:
                 raise Exception(
                     "Trying to persist state with unpersisted prev_group: %r"
                     % (prev_group,)
@@ -726,8 +735,10 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
         )
 
     async def purge_unreferenced_state_groups(
-        self, room_id: str, state_groups_to_delete: Collection[int]
-    ) -> None:
+        self,
+        room_id: str,
+        state_groups_to_sequence_numbers: Mapping[int, int],
+    ) -> bool:
         """Deletes no longer referenced state groups and de-deltas any state
         groups that reference them.
 
@@ -735,21 +746,31 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
             room_id: The room the state groups belong to (must all be in the
                 same room).
             state_groups_to_delete: Set of all state groups to delete.
+
+        Returns:
+            Whether any state groups were actually deleted.
         """
 
-        await self.db_pool.runInteraction(
+        return await self.db_pool.runInteraction(
             "purge_unreferenced_state_groups",
             self._purge_unreferenced_state_groups,
             room_id,
-            state_groups_to_delete,
+            state_groups_to_sequence_numbers,
         )
 
     def _purge_unreferenced_state_groups(
         self,
         txn: LoggingTransaction,
         room_id: str,
-        state_groups_to_delete: Collection[int],
-    ) -> None:
+        state_groups_to_sequence_numbers: Mapping[int, int],
+    ) -> bool:
+        state_groups_to_delete = self._state_deletion_store.get_state_groups_ready_for_potential_deletion_txn(
+            txn, state_groups_to_sequence_numbers
+        )
+
+        if not state_groups_to_delete:
+            return False
+
         logger.info(
             "[purge] found %i state groups to delete", len(state_groups_to_delete)
         )
@@ -807,10 +828,20 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
             "DELETE FROM state_groups_state WHERE state_group = ?",
             [(sg,) for sg in state_groups_to_delete],
         )
+        txn.execute_batch(
+            "DELETE FROM state_group_edges WHERE state_group = ?",
+            [(sg,) for sg in state_groups_to_delete],
+        )
         txn.execute_batch(
             "DELETE FROM state_groups WHERE id = ?",
             [(sg,) for sg in state_groups_to_delete],
         )
+        txn.execute_batch(
+            "DELETE FROM state_groups_pending_deletion WHERE state_group = ?",
+            [(sg,) for sg in state_groups_to_delete],
+        )
+
+        return True
 
     @trace
     @tag_args
@@ -830,7 +861,7 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
             List[Tuple[int, int]],
             await self.db_pool.simple_select_many_batch(
                 table="state_group_edges",
-                column="prev_state_group",
+                column="state_group",
                 iterable=state_groups,
                 keyvalues={},
                 retcols=("state_group", "prev_state_group"),
@@ -840,60 +871,71 @@ class StateGroupDataStore(StateBackgroundUpdateStore, SQLBaseStore):
 
         return dict(rows)
 
-    async def purge_room_state(
-        self, room_id: str, state_groups_to_delete: Collection[int]
-    ) -> None:
-        """Deletes all record of a room from state tables
+    @trace
+    @tag_args
+    async def get_next_state_groups(
+        self, state_groups: Iterable[int]
+    ) -> Dict[int, int]:
+        """Fetch the groups that have the given state groups as their previous
+        state groups.
 
         Args:
-            room_id:
-            state_groups_to_delete: State groups to delete
+            state_groups
+
+        Returns:
+            A mapping from state group to previous state group.
         """
 
-        logger.info("[purge] Starting state purge")
-        await self.db_pool.runInteraction(
+        rows = cast(
+            List[Tuple[int, int]],
+            await self.db_pool.simple_select_many_batch(
+                table="state_group_edges",
+                column="prev_state_group",
+                iterable=state_groups,
+                keyvalues={},
+                retcols=("state_group", "prev_state_group"),
+                desc="get_next_state_groups",
+            ),
+        )
+
+        return dict(rows)
+
+    async def purge_room_state(self, room_id: str) -> None:
+        return await self.db_pool.runInteraction(
             "purge_room_state",
             self._purge_room_state_txn,
             room_id,
-            state_groups_to_delete,
         )
-        logger.info("[purge] Done with state purge")
 
     def _purge_room_state_txn(
         self,
         txn: LoggingTransaction,
         room_id: str,
-        state_groups_to_delete: Collection[int],
     ) -> None:
-        # first we have to delete the state groups states
-        logger.info("[purge] removing %s from state_groups_state", room_id)
-
-        self.db_pool.simple_delete_many_txn(
-            txn,
-            table="state_groups_state",
-            column="state_group",
-            values=state_groups_to_delete,
-            keyvalues={},
-        )
-
-        # ... and the state group edges
+        # Delete all edges that reference a state group linked to room_id
         logger.info("[purge] removing %s from state_group_edges", room_id)
-
-        self.db_pool.simple_delete_many_txn(
-            txn,
-            table="state_group_edges",
-            column="state_group",
-            values=state_groups_to_delete,
-            keyvalues={},
+        txn.execute(
+            """
+            DELETE FROM state_group_edges AS sge WHERE sge.state_group IN (
+                SELECT id FROM state_groups AS sg WHERE sg.room_id = ?
+            )""",
+            (room_id,),
         )
 
-        # ... and the state groups
-        logger.info("[purge] removing %s from state_groups", room_id)
+        # state_groups_state table has a room_id column but no index on it, unlike state_groups,
+        # so we delete them by matching the room_id through the state_groups table.
+        logger.info("[purge] removing %s from state_groups_state", room_id)
+        txn.execute(
+            """
+            DELETE FROM state_groups_state AS sgs WHERE sgs.state_group IN (
+                SELECT id FROM state_groups AS sg WHERE sg.room_id = ?
+            )""",
+            (room_id,),
+        )
 
-        self.db_pool.simple_delete_many_txn(
+        logger.info("[purge] removing %s from state_groups", room_id)
+        self.db_pool.simple_delete_txn(
             txn,
             table="state_groups",
-            column="id",
-            values=state_groups_to_delete,
-            keyvalues={},
+            keyvalues={"room_id": room_id},
         )
diff --git a/synapse/storage/engines/postgres.py b/synapse/storage/engines/postgres.py
index 8c8c6d0414..e4cd359201 100644
--- a/synapse/storage/engines/postgres.py
+++ b/synapse/storage/engines/postgres.py
@@ -99,8 +99,8 @@ class PostgresEngine(
         allow_unsafe_locale = self.config.get("allow_unsafe_locale", False)
 
         # Are we on a supported PostgreSQL version?
-        if not allow_outdated_version and self._version < 110000:
-            raise RuntimeError("Synapse requires PostgreSQL 11 or above.")
+        if not allow_outdated_version and self._version < 130000:
+            raise RuntimeError("Synapse requires PostgreSQL 13 or above.")
 
         with db_conn.cursor() as txn:
             txn.execute("SHOW SERVER_ENCODING")
diff --git a/synapse/storage/schema/__init__.py b/synapse/storage/schema/__init__.py
index 934e1ccced..2160edb014 100644
--- a/synapse/storage/schema/__init__.py
+++ b/synapse/storage/schema/__init__.py
@@ -19,7 +19,7 @@
 #
 #
 
-SCHEMA_VERSION = 88  # remember to update the list below when updating
+SCHEMA_VERSION = 90  # remember to update the list below when updating
 """Represents the expectations made by the codebase about the database schema
 
 This should be incremented whenever the codebase changes its requirements on the
@@ -155,6 +155,13 @@ Changes in SCHEMA_VERSION = 88
       be posted in response to a resettable timeout or an on-demand action.
     - Add background update to fix data integrity issue in the
       `sliding_sync_membership_snapshots` -> `forgotten` column
+
+Changes in SCHEMA_VERSION = 89
+    - Add `state_groups_pending_deletion` and `state_groups_persisting` tables.
+
+Changes in SCHEMA_VERSION = 90
+    - Add a column `participant` to `room_memberships` table
+    - Add background update to delete unreferenced state groups.
 """
 
 
diff --git a/synapse/storage/schema/main/delta/88/01_custom_profile_fields.sql b/synapse/storage/schema/main/delta/88/01_custom_profile_fields.sql
new file mode 100644
index 0000000000..63cbd7ffa9
--- /dev/null
+++ b/synapse/storage/schema/main/delta/88/01_custom_profile_fields.sql
@@ -0,0 +1,15 @@
+--
+-- This file is licensed under the Affero General Public License (AGPL) version 3.
+--
+-- Copyright (C) 2024 Patrick Cloke
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- See the GNU Affero General Public License for more details:
+-- <https://www.gnu.org/licenses/agpl-3.0.html>.
+
+-- Custom profile fields.
+ALTER TABLE profiles ADD COLUMN fields JSONB;
diff --git a/synapse/storage/schema/main/delta/88/04_current_state_delta_index.sql b/synapse/storage/schema/main/delta/88/04_current_state_delta_index.sql
index ad54302a8f..0ee78df1a0 100644
--- a/synapse/storage/schema/main/delta/88/04_current_state_delta_index.sql
+++ b/synapse/storage/schema/main/delta/88/04_current_state_delta_index.sql
@@ -12,7 +12,7 @@
 -- <https://www.gnu.org/licenses/agpl-3.0.html>.
 
 
--- Add an index on (user_id, device_id, algorithm, ts_added_ms) on e2e_one_time_keys_json, so that OTKs can
--- efficiently be issued in the same order they were uploaded.
+-- Add an index on `current_state_delta_stream(room_id, stream_id)` to allow
+-- efficient per-room lookups.
 INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
     (8804, 'current_state_delta_stream_room_index', '{}');
diff --git a/synapse/storage/schema/main/delta/88/06_events_received_ts_index.sql b/synapse/storage/schema/main/delta/88/06_events_received_ts_index.sql
new file mode 100644
index 0000000000..d70a4a8dbc
--- /dev/null
+++ b/synapse/storage/schema/main/delta/88/06_events_received_ts_index.sql
@@ -0,0 +1,17 @@
+--
+-- This file is licensed under the Affero General Public License (AGPL) version 3.
+--
+-- Copyright (C) 2024 New Vector, Ltd
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- See the GNU Affero General Public License for more details:
+-- <https://www.gnu.org/licenses/agpl-3.0.html>.
+
+-- Add an index on `events.received_ts` for `m.room.member` events to allow for
+-- efficient lookup of events by timestamp in some Admin API's
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+    (8806, 'events_received_ts_index', '{}');
diff --git a/synapse/storage/schema/main/delta/89/01_sliding_sync_membership_snapshot_index.sql b/synapse/storage/schema/main/delta/89/01_sliding_sync_membership_snapshot_index.sql
new file mode 100644
index 0000000000..7799cffdce
--- /dev/null
+++ b/synapse/storage/schema/main/delta/89/01_sliding_sync_membership_snapshot_index.sql
@@ -0,0 +1,15 @@
+--
+-- This file is licensed under the Affero General Public License (AGPL) version 3.
+--
+-- Copyright (C) 2025 New Vector, Ltd
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- See the GNU Affero General Public License for more details:
+-- <https://www.gnu.org/licenses/agpl-3.0.html>.
+
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+    (8901, 'sliding_sync_membership_snapshots_membership_event_id_idx', '{}');
diff --git a/synapse/storage/schema/main/delta/90/01_add_column_participant_room_memberships_table.sql b/synapse/storage/schema/main/delta/90/01_add_column_participant_room_memberships_table.sql
new file mode 100644
index 0000000000..672be1031e
--- /dev/null
+++ b/synapse/storage/schema/main/delta/90/01_add_column_participant_room_memberships_table.sql
@@ -0,0 +1,20 @@
+--
+-- This file is licensed under the Affero General Public License (AGPL) version 3.
+--
+-- Copyright (C) 2025 New Vector, Ltd
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- See the GNU Affero General Public License for more details:
+-- <https://www.gnu.org/licenses/agpl-3.0.html>.
+
+-- Add a column `participant` to `room_memberships` table to track whether a room member has sent
+-- a `m.room.message` or `m.room.encrypted` event into a room they are a member of
+ALTER TABLE room_memberships ADD COLUMN participant BOOLEAN DEFAULT FALSE;
+
+-- Add a background update to populate `participant` column
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+  (9001, 'populate_participant_bg_update', '{}');
\ No newline at end of file
diff --git a/synapse/storage/schema/state/delta/89/01_state_groups_deletion.sql b/synapse/storage/schema/state/delta/89/01_state_groups_deletion.sql
new file mode 100644
index 0000000000..d4cb27a3a2
--- /dev/null
+++ b/synapse/storage/schema/state/delta/89/01_state_groups_deletion.sql
@@ -0,0 +1,39 @@
+--
+-- This file is licensed under the Affero General Public License (AGPL) version 3.
+--
+-- Copyright (C) 2025 New Vector, Ltd
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- See the GNU Affero General Public License for more details:
+-- <https://www.gnu.org/licenses/agpl-3.0.html>.
+
+-- See the `StateDeletionDataStore` for details of these tables.
+
+-- We add state groups to this table when we want to later delete them. The
+-- `insertion_ts` column indicates when the state group was proposed for
+-- deletion (rather than when it should be deleted).
+CREATE TABLE IF NOT EXISTS state_groups_pending_deletion (
+    sequence_number $%AUTO_INCREMENT_PRIMARY_KEY%$,
+    state_group BIGINT NOT NULL,
+    insertion_ts BIGINT NOT NULL
+);
+
+CREATE UNIQUE INDEX state_groups_pending_deletion_state_group ON state_groups_pending_deletion(state_group);
+CREATE INDEX state_groups_pending_deletion_insertion_ts ON state_groups_pending_deletion(insertion_ts);
+
+
+-- Holds the state groups the worker is currently persisting.
+--
+-- The `sequence_number` column of the `state_groups_pending_deletion` table
+-- *must* be updated whenever a state group may have become referenced.
+CREATE TABLE IF NOT EXISTS state_groups_persisting (
+    state_group BIGINT NOT NULL,
+    instance_name TEXT NOT NULL,
+    PRIMARY KEY (state_group, instance_name)
+);
+
+CREATE INDEX state_groups_persisting_instance_name ON state_groups_persisting(instance_name);
diff --git a/synapse/storage/schema/state/delta/90/02_delete_unreferenced_state_groups.sql b/synapse/storage/schema/state/delta/90/02_delete_unreferenced_state_groups.sql
new file mode 100644
index 0000000000..55a038e2b8
--- /dev/null
+++ b/synapse/storage/schema/state/delta/90/02_delete_unreferenced_state_groups.sql
@@ -0,0 +1,16 @@
+--
+-- This file is licensed under the Affero General Public License (AGPL) version 3.
+--
+-- Copyright (C) 2025 New Vector, Ltd
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- See the GNU Affero General Public License for more details:
+-- <https://www.gnu.org/licenses/agpl-3.0.html>.
+
+-- Add a background update to delete any unreferenced state groups
+INSERT INTO background_updates (ordering, update_name, progress_json) VALUES
+  (9002, 'mark_unreferenced_state_groups_for_deletion_bg_update', '{}');
diff --git a/synapse/storage/types.py b/synapse/storage/types.py
index 74f60cc590..4329d88c9a 100644
--- a/synapse/storage/types.py
+++ b/synapse/storage/types.py
@@ -26,14 +26,13 @@ from typing import (
     List,
     Mapping,
     Optional,
+    Protocol,
     Sequence,
     Tuple,
     Type,
     Union,
 )
 
-from typing_extensions import Protocol
-
 """
 Some very basic protocol definitions for the DB-API2 classes specified in PEP-249
 """
diff --git a/synapse/types/__init__.py b/synapse/types/__init__.py
index 26783c5622..e9cdd19868 100644
--- a/synapse/types/__init__.py
+++ b/synapse/types/__init__.py
@@ -40,6 +40,7 @@ from typing import (
     Set,
     Tuple,
     Type,
+    TypedDict,
     TypeVar,
     Union,
     overload,
@@ -49,7 +50,7 @@ import attr
 from immutabledict import immutabledict
 from signedjson.key import decode_verify_key_bytes
 from signedjson.types import VerifyKey
-from typing_extensions import Self, TypedDict
+from typing_extensions import Self
 from unpaddedbase64 import decode_base64
 from zope.interface import Interface
 
@@ -664,6 +665,11 @@ class RoomStreamToken(AbstractMultiWriterStreamToken):
 
     @classmethod
     async def parse(cls, store: "PurgeEventsStore", string: str) -> "RoomStreamToken":
+        # Check that it looks like a Synapse token first. We do this so that
+        # we don't log at the exception-level for obviously incorrect tokens.
+        if not string or string[0] not in ("s", "t", "m"):
+            raise SynapseError(400, f"Invalid room stream token {string:!r}")
+
         try:
             if string[0] == "s":
                 return cls(topological=None, stream=int(string[1:]))
diff --git a/synapse/types/handlers/sliding_sync.py b/synapse/types/handlers/sliding_sync.py
index aae60fddea..3ebd334a6d 100644
--- a/synapse/types/handlers/sliding_sync.py
+++ b/synapse/types/handlers/sliding_sync.py
@@ -407,8 +407,8 @@ class StateValues:
     # Include all state events of the given type
     WILDCARD: Final = "*"
     # Lazy-load room membership events (include room membership events for any event
-    # `sender` in the timeline). We only give special meaning to this value when it's a
-    # `state_key`.
+    # `sender` or membership change target in the timeline). We only give special
+    # meaning to this value when it's a `state_key`.
     LAZY: Final = "$LAZY"
     # Subsitute with the requester's user ID. Typically used by clients to get
     # the user's membership.
@@ -641,9 +641,10 @@ class RoomSyncConfig:
             if user_id == StateValues.ME:
                 continue
             # We're lazy-loading membership so we can just return the state we have.
-            # Lazy-loading means we include membership for any event `sender` in the
-            # timeline but since we had to auth those timeline events, we will have the
-            # membership state for them (including from remote senders).
+            # Lazy-loading means we include membership for any event `sender` or
+            # membership change target in the timeline but since we had to auth those
+            # timeline events, we will have the membership state for them (including
+            # from remote senders).
             elif user_id == StateValues.LAZY:
                 continue
             elif user_id == StateValues.WILDCARD:
diff --git a/synapse/types/storage/__init__.py b/synapse/types/storage/__init__.py
index b5fa20a41a..e03ff7ffc8 100644
--- a/synapse/types/storage/__init__.py
+++ b/synapse/types/storage/__init__.py
@@ -48,3 +48,7 @@ class _BackgroundUpdates:
     SLIDING_SYNC_MEMBERSHIP_SNAPSHOTS_FIX_FORGOTTEN_COLUMN_BG_UPDATE = (
         "sliding_sync_membership_snapshots_fix_forgotten_column_bg_update"
     )
+
+    MARK_UNREFERENCED_STATE_GROUPS_FOR_DELETION_BG_UPDATE = (
+        "mark_unreferenced_state_groups_for_deletion_bg_update"
+    )
diff --git a/synapse/util/async_helpers.py b/synapse/util/async_helpers.py
index e1eb8a4863..e596e1ed20 100644
--- a/synapse/util/async_helpers.py
+++ b/synapse/util/async_helpers.py
@@ -41,6 +41,7 @@ from typing import (
     Hashable,
     Iterable,
     List,
+    Literal,
     Optional,
     Set,
     Tuple,
@@ -51,7 +52,7 @@ from typing import (
 )
 
 import attr
-from typing_extensions import Concatenate, Literal, ParamSpec, Unpack
+from typing_extensions import Concatenate, ParamSpec, Unpack
 
 from twisted.internet import defer
 from twisted.internet.defer import CancelledError
diff --git a/synapse/util/caches/dictionary_cache.py b/synapse/util/caches/dictionary_cache.py
index 1e6696332f..14bd3ba3b0 100644
--- a/synapse/util/caches/dictionary_cache.py
+++ b/synapse/util/caches/dictionary_cache.py
@@ -21,10 +21,19 @@
 import enum
 import logging
 import threading
-from typing import Dict, Generic, Iterable, Optional, Set, Tuple, TypeVar, Union
+from typing import (
+    Dict,
+    Generic,
+    Iterable,
+    Literal,
+    Optional,
+    Set,
+    Tuple,
+    TypeVar,
+    Union,
+)
 
 import attr
-from typing_extensions import Literal
 
 from synapse.util.caches.lrucache import LruCache
 from synapse.util.caches.treecache import TreeCache
diff --git a/synapse/util/caches/expiringcache.py b/synapse/util/caches/expiringcache.py
index 8017c031ee..3198fdd2ed 100644
--- a/synapse/util/caches/expiringcache.py
+++ b/synapse/util/caches/expiringcache.py
@@ -21,10 +21,9 @@
 
 import logging
 from collections import OrderedDict
-from typing import Any, Generic, Iterable, Optional, TypeVar, Union, overload
+from typing import Any, Generic, Iterable, Literal, Optional, TypeVar, Union, overload
 
 import attr
-from typing_extensions import Literal
 
 from twisted.internet import defer
 
diff --git a/synapse/util/caches/lrucache.py b/synapse/util/caches/lrucache.py
index 481a1a621e..2e5efa3a52 100644
--- a/synapse/util/caches/lrucache.py
+++ b/synapse/util/caches/lrucache.py
@@ -34,6 +34,7 @@ from typing import (
     Generic,
     Iterable,
     List,
+    Literal,
     Optional,
     Set,
     Tuple,
@@ -44,8 +45,6 @@ from typing import (
     overload,
 )
 
-from typing_extensions import Literal
-
 from twisted.internet import reactor
 from twisted.internet.interfaces import IReactorTime
 
diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py
index 03503abe0f..5ac8643eef 100644
--- a/synapse/util/caches/stream_change_cache.py
+++ b/synapse/util/caches/stream_change_cache.py
@@ -314,6 +314,15 @@ class StreamChangeCache:
         self._entity_to_key[entity] = stream_pos
         self._evict()
 
+    def all_entities_changed(self, stream_pos: int) -> None:
+        """
+        Mark all entities as changed. This is useful when the cache is invalidated and
+        there may be some potential change for all of the entities.
+        """
+        self._cache.clear()
+        self._entity_to_key.clear()
+        self._earliest_known_stream_pos = stream_pos
+
     def _evict(self) -> None:
         """
         Ensure the cache has not exceeded the maximum size.
diff --git a/synapse/util/iterutils.py b/synapse/util/iterutils.py
index b73f690b88..ff6adeb716 100644
--- a/synapse/util/iterutils.py
+++ b/synapse/util/iterutils.py
@@ -30,14 +30,13 @@ from typing import (
     Iterator,
     List,
     Mapping,
+    Protocol,
     Set,
     Sized,
     Tuple,
     TypeVar,
 )
 
-from typing_extensions import Protocol
-
 T = TypeVar("T")
 S = TypeVar("S", bound="_SelfSlice")
 
diff --git a/synapse/util/macaroons.py b/synapse/util/macaroons.py
index 84ae226207..6fa15543ec 100644
--- a/synapse/util/macaroons.py
+++ b/synapse/util/macaroons.py
@@ -22,12 +22,11 @@
 
 """Utilities for manipulating macaroons"""
 
-from typing import Callable, Optional
+from typing import Callable, Literal, Optional
 
 import attr
 import pymacaroons
 from pymacaroons.exceptions import MacaroonVerificationFailedException
-from typing_extensions import Literal
 
 from synapse.util import Clock, stringutils
 
diff --git a/synapse/util/metrics.py b/synapse/util/metrics.py
index 020618598c..6a389f7a7e 100644
--- a/synapse/util/metrics.py
+++ b/synapse/util/metrics.py
@@ -22,10 +22,19 @@
 import logging
 from functools import wraps
 from types import TracebackType
-from typing import Awaitable, Callable, Dict, Generator, Optional, Type, TypeVar
+from typing import (
+    Awaitable,
+    Callable,
+    Dict,
+    Generator,
+    Optional,
+    Protocol,
+    Type,
+    TypeVar,
+)
 
 from prometheus_client import CollectorRegistry, Counter, Metric
-from typing_extensions import Concatenate, ParamSpec, Protocol
+from typing_extensions import Concatenate, ParamSpec
 
 from synapse.logging.context import (
     ContextResourceUsage,
diff --git a/synapse/util/patch_inline_callbacks.py b/synapse/util/patch_inline_callbacks.py
index 56bdf451da..beea4d2888 100644
--- a/synapse/util/patch_inline_callbacks.py
+++ b/synapse/util/patch_inline_callbacks.py
@@ -162,7 +162,7 @@ def _check_yield_points(
                     d = result.throwExceptionIntoGenerator(gen)
                 else:
                     d = gen.send(result)
-            except (StopIteration, defer._DefGen_Return) as e:
+            except StopIteration as e:
                 if current_context() != expected_context:
                     # This happens when the context is lost sometime *after* the
                     # final yield and returning. E.g. we forgot to yield on a
@@ -183,7 +183,7 @@ def _check_yield_points(
                         )
                     )
                     changes.append(err)
-                # The `StopIteration` or `_DefGen_Return` contains the return value from the
+                # The `StopIteration` contains the return value from the
                 # generator.
                 return cast(T, e.value)
 
diff --git a/synapse/util/stringutils.py b/synapse/util/stringutils.py
index 13ff54b669..32b5bc00c9 100644
--- a/synapse/util/stringutils.py
+++ b/synapse/util/stringutils.py
@@ -43,6 +43,14 @@ CLIENT_SECRET_REGEX = re.compile(r"^[0-9a-zA-Z\.=_\-]+$")
 #
 MXC_REGEX = re.compile("^mxc://([^/]+)/([^/#?]+)$")
 
+# https://spec.matrix.org/v1.13/appendices/#common-namespaced-identifier-grammar
+#
+# At least one character, less than or equal to 255 characters. Must start with
+# a-z, the rest is a-z, 0-9, -, _, or ..
+#
+# This doesn't check anything about validity of namespaces.
+NAMESPACED_GRAMMAR = re.compile(r"^[a-z][a-z0-9_.-]{0,254}$")
+
 
 def random_string(length: int) -> str:
     """Generate a cryptographically secure string of random letters.
@@ -68,6 +76,10 @@ def is_ascii(s: bytes) -> bool:
     return True
 
 
+def is_namedspaced_grammar(s: str) -> bool:
+    return bool(NAMESPACED_GRAMMAR.match(s))
+
+
 def assert_valid_client_secret(client_secret: str) -> None:
     """Validate that a given string matches the client_secret defined by the spec"""
     if (
diff --git a/synapse/util/task_scheduler.py b/synapse/util/task_scheduler.py
index 448960b297..4683d09cd7 100644
--- a/synapse/util/task_scheduler.py
+++ b/synapse/util/task_scheduler.py
@@ -46,33 +46,43 @@ logger = logging.getLogger(__name__)
 
 class TaskScheduler:
     """
-    This is a simple task sheduler aimed at resumable tasks: usually we use `run_in_background`
-    to launch a background task, or Twisted `deferLater` if we want to do so later on.
+    This is a simple task scheduler designed for resumable tasks. Normally,
+    you'd use `run_in_background` to start a background task or Twisted's
+    `deferLater` if you want to run it later.
 
-    The problem with that is that the tasks will just stop and never be resumed if synapse
-    is stopped for whatever reason.
+    The issue is that these tasks stop completely and won't resume if Synapse is
+    shut down for any reason.
 
-    How this works:
-    - A function mapped to a named action should first be registered with `register_action`.
-    This function will be called when trying to resuming tasks after a synapse shutdown,
-    so this registration should happen when synapse is initialised, NOT right before scheduling
-    a task.
-    - A task can then be launched using this named action with `schedule_task`. A `params` dict
-    can be passed, and it will be available to the registered function when launched. This task
-    can be launch either now-ish, or later on by giving a `timestamp` parameter.
+    Here's how it works:
 
-    The function may call `update_task` at any time to update the `result` of the task,
-    and this can be used to resume the task at a specific point and/or to convey a result to
-    the code launching the task.
-    You can also specify the `result` (and/or an `error`) when returning from the function.
+    - Register an Action: First, you need to register a function to a named
+      action using `register_action`. This function will be called to resume tasks
+      after a Synapse shutdown. Make sure to register it when Synapse initializes,
+      not right before scheduling the task.
 
-    The reconciliation loop runs every minute, so this is not a precise scheduler.
-    There is a limit of 10 concurrent tasks, so tasks may be delayed if the pool is already
-    full. In this regard, please take great care that scheduled tasks can actually finished.
-    For now there is no mechanism to stop a running task if it is stuck.
+    - Schedule a Task: You can launch a task linked to the named action
+      using `schedule_task`. You can pass a `params` dictionary, which will be
+      passed to the registered function when it's executed. Tasks can be scheduled
+      to run either immediately or later by specifying a `timestamp`.
 
-    Tasks will be run on the worker specified with `run_background_tasks_on` config,
-    or the main one by default.
+    - Update Task: The function handling the task can call `update_task` at
+      any point to update the task's `result`. This lets you resume the task from
+      a specific point or pass results back to the code that scheduled it. When
+      the function completes, you can also return a `result` or an `error`.
+
+    Things to keep in mind:
+
+    - The reconciliation loop runs every minute, so this is not a high-precision
+      scheduler.
+
+    - Only 10 tasks can run at the same time. If the pool is full, tasks may be
+      delayed. Make sure your scheduled tasks can actually finish.
+
+    - Currently, there's no way to stop a task if it gets stuck.
+
+    - Tasks will run on the worker defined by the `run_background_tasks_on`
+      setting in your configuration. If no worker is specified, they'll run on
+      the main one by default.
     """
 
     # Precision of the scheduler, evaluation of tasks to run will only happen
@@ -157,7 +167,7 @@ class TaskScheduler:
         params: Optional[JsonMapping] = None,
     ) -> str:
         """Schedule a new potentially resumable task. A function matching the specified
-        `action` should have be registered with `register_action` before the task is run.
+        `action` should've been registered with `register_action` before the task is run.
 
         Args:
             action: the name of a previously registered action
@@ -174,9 +184,10 @@ class TaskScheduler:
             The id of the scheduled task
         """
         status = TaskStatus.SCHEDULED
+        start_now = False
         if timestamp is None or timestamp < self._clock.time_msec():
             timestamp = self._clock.time_msec()
-            status = TaskStatus.ACTIVE
+            start_now = True
 
         task = ScheduledTask(
             random_string(16),
@@ -190,9 +201,11 @@ class TaskScheduler:
         )
         await self._store.insert_scheduled_task(task)
 
-        if status == TaskStatus.ACTIVE:
+        # If the task is ready to run immediately, run the scheduling algorithm now
+        # rather than waiting
+        if start_now:
             if self._run_background_tasks:
-                await self._launch_task(task)
+                self._launch_scheduled_tasks()
             else:
                 self._hs.get_replication_command_handler().send_new_active_task(task.id)
 
@@ -207,15 +220,15 @@ class TaskScheduler:
         result: Optional[JsonMapping] = None,
         error: Optional[str] = None,
     ) -> bool:
-        """Update some task associated values. This is exposed publicly so it can
-        be used inside task functions, mainly to update the result and be able to
-        resume a task at a specific step after a restart of synapse.
+        """Update some task-associated values. This is exposed publicly so it can
+        be used inside task functions, mainly to update the result or resume
+        a task at a specific step after a restart of synapse.
 
         It can also be used to stage a task, by setting the `status` to `SCHEDULED` with
         a new timestamp.
 
-        The `status` can only be set to `ACTIVE` or `SCHEDULED`, `COMPLETE` and `FAILED`
-        are terminal status and can only be set by returning it in the function.
+        The `status` can only be set to `ACTIVE` or `SCHEDULED`. `COMPLETE` and `FAILED`
+        are terminal statuses and can only be set by returning them from the function.
 
         Args:
             id: the id of the task to update
@@ -223,6 +236,12 @@ class TaskScheduler:
             status: the new `TaskStatus` of the task
             result: the new result of the task
             error: the new error of the task
+
+        Returns:
+            True if the update was successful, False otherwise.
+
+        Raises:
+            Exception: If a status other than `ACTIVE` or `SCHEDULED` was passed.
         """
         if status == TaskStatus.COMPLETE or status == TaskStatus.FAILED:
             raise Exception(
@@ -260,9 +279,9 @@ class TaskScheduler:
         max_timestamp: Optional[int] = None,
         limit: Optional[int] = None,
     ) -> List[ScheduledTask]:
-        """Get a list of tasks. Returns all the tasks if no args is provided.
+        """Get a list of tasks. Returns all the tasks if no args are provided.
 
-        If an arg is `None` all tasks matching the other args will be selected.
+        If an arg is `None`, all tasks matching the other args will be selected.
         If an arg is an empty list, the corresponding value of the task needs
         to be `None` to be selected.
 
@@ -274,8 +293,8 @@ class TaskScheduler:
                 a timestamp inferior to the specified one
             limit: Only return `limit` number of rows if set.
 
-        Returns
-            A list of `ScheduledTask`, ordered by increasing timestamps
+        Returns:
+            A list of `ScheduledTask`, ordered by increasing timestamps.
         """
         return await self._store.get_scheduled_tasks(
             actions=actions,
@@ -300,23 +319,13 @@ class TaskScheduler:
             raise Exception(f"Task {id} is currently ACTIVE and can't be deleted")
         await self._store.delete_scheduled_task(id)
 
-    def launch_task_by_id(self, id: str) -> None:
-        """Try launching the task with the given ID."""
-        # Don't bother trying to launch new tasks if we're already at capacity.
-        if len(self._running_tasks) >= TaskScheduler.MAX_CONCURRENT_RUNNING_TASKS:
-            return
+    def on_new_task(self, task_id: str) -> None:
+        """Handle a notification that a new ready-to-run task has been added to the queue"""
+        # Just run the scheduler
+        self._launch_scheduled_tasks()
 
-        run_as_background_process("launch_task_by_id", self._launch_task_by_id, id)
-
-    async def _launch_task_by_id(self, id: str) -> None:
-        """Helper async function for `launch_task_by_id`."""
-        task = await self.get_task(id)
-        if task:
-            await self._launch_task(task)
-
-    @wrap_as_background_process("launch_scheduled_tasks")
-    async def _launch_scheduled_tasks(self) -> None:
-        """Retrieve and launch scheduled tasks that should be running at that time."""
+    def _launch_scheduled_tasks(self) -> None:
+        """Retrieve and launch scheduled tasks that should be running at this time."""
         # Don't bother trying to launch new tasks if we're already at capacity.
         if len(self._running_tasks) >= TaskScheduler.MAX_CONCURRENT_RUNNING_TASKS:
             return
@@ -326,20 +335,26 @@ class TaskScheduler:
 
         self._launching_new_tasks = True
 
-        try:
-            for task in await self.get_tasks(
-                statuses=[TaskStatus.ACTIVE], limit=self.MAX_CONCURRENT_RUNNING_TASKS
-            ):
-                await self._launch_task(task)
-            for task in await self.get_tasks(
-                statuses=[TaskStatus.SCHEDULED],
-                max_timestamp=self._clock.time_msec(),
-                limit=self.MAX_CONCURRENT_RUNNING_TASKS,
-            ):
-                await self._launch_task(task)
+        async def inner() -> None:
+            try:
+                for task in await self.get_tasks(
+                    statuses=[TaskStatus.ACTIVE],
+                    limit=self.MAX_CONCURRENT_RUNNING_TASKS,
+                ):
+                    # _launch_task will ignore tasks that we're already running, and
+                    # will also do nothing if we're already at the maximum capacity.
+                    await self._launch_task(task)
+                for task in await self.get_tasks(
+                    statuses=[TaskStatus.SCHEDULED],
+                    max_timestamp=self._clock.time_msec(),
+                    limit=self.MAX_CONCURRENT_RUNNING_TASKS,
+                ):
+                    await self._launch_task(task)
 
-        finally:
-            self._launching_new_tasks = False
+            finally:
+                self._launching_new_tasks = False
+
+        run_as_background_process("launch_scheduled_tasks", inner)
 
     @wrap_as_background_process("clean_scheduled_tasks")
     async def _clean_scheduled_tasks(self) -> None:
diff --git a/tests/api/test_urls.py b/tests/api/test_urls.py
new file mode 100644
index 0000000000..ce156a05dc
--- /dev/null
+++ b/tests/api/test_urls.py
@@ -0,0 +1,55 @@
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright (C) 2024 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+
+
+from twisted.test.proto_helpers import MemoryReactor
+
+from synapse.api.urls import LoginSSORedirectURIBuilder
+from synapse.server import HomeServer
+from synapse.util import Clock
+
+from tests.unittest import HomeserverTestCase
+
+# a (valid) url with some annoying characters in.  %3D is =, %26 is &, %2B is +
+TRICKY_TEST_CLIENT_REDIRECT_URL = 'https://x?<ab c>&q"+%3D%2B"="fö%26=o"'
+
+
+class LoginSSORedirectURIBuilderTestCase(HomeserverTestCase):
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.login_sso_redirect_url_builder = LoginSSORedirectURIBuilder(hs.config)
+
+    def test_no_idp_id(self) -> None:
+        self.assertEqual(
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id=None, client_redirect_url="http://example.com/redirect"
+            ),
+            "https://test/_matrix/client/v3/login/sso/redirect?redirectUrl=http%3A%2F%2Fexample.com%2Fredirect",
+        )
+
+    def test_explicit_idp_id(self) -> None:
+        self.assertEqual(
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id="oidc-github", client_redirect_url="http://example.com/redirect"
+            ),
+            "https://test/_matrix/client/v3/login/sso/redirect/oidc-github?redirectUrl=http%3A%2F%2Fexample.com%2Fredirect",
+        )
+
+    def test_tricky_redirect_uri(self) -> None:
+        self.assertEqual(
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id="oidc-github",
+                client_redirect_url=TRICKY_TEST_CLIENT_REDIRECT_URL,
+            ),
+            "https://test/_matrix/client/v3/login/sso/redirect/oidc-github?redirectUrl=https%3A%2F%2Fx%3F%3Cab+c%3E%26q%22%2B%253D%252B%22%3D%22f%C3%B6%2526%3Do%22",
+        )
diff --git a/tests/config/test_load.py b/tests/config/test_load.py
index c5dee06af5..a5456ac6f8 100644
--- a/tests/config/test_load.py
+++ b/tests/config/test_load.py
@@ -21,6 +21,7 @@
 #
 import tempfile
 from typing import Callable
+from unittest import mock
 
 import yaml
 from parameterized import parameterized
@@ -31,6 +32,11 @@ from synapse.config.homeserver import HomeServerConfig
 
 from tests.config.utils import ConfigFileTestCase
 
+try:
+    import authlib
+except ImportError:
+    authlib = None
+
 try:
     import hiredis
 except ImportError:
@@ -39,7 +45,7 @@ except ImportError:
 
 class ConfigLoadingFileTestCase(ConfigFileTestCase):
     def test_load_fails_if_server_name_missing(self) -> None:
-        self.generate_config_and_remove_lines_containing("server_name")
+        self.generate_config_and_remove_lines_containing(["server_name"])
         with self.assertRaises(ConfigError):
             HomeServerConfig.load_config("", ["-c", self.config_file])
         with self.assertRaises(ConfigError):
@@ -76,7 +82,7 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
             )
 
     def test_load_succeeds_if_macaroon_secret_key_missing(self) -> None:
-        self.generate_config_and_remove_lines_containing("macaroon")
+        self.generate_config_and_remove_lines_containing(["macaroon"])
         config1 = HomeServerConfig.load_config("", ["-c", self.config_file])
         config2 = HomeServerConfig.load_config("", ["-c", self.config_file])
         config3 = HomeServerConfig.load_or_generate_config("", ["-c", self.config_file])
@@ -111,7 +117,7 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
         self.assertTrue(config3.registration.enable_registration)
 
     def test_stats_enabled(self) -> None:
-        self.generate_config_and_remove_lines_containing("enable_metrics")
+        self.generate_config_and_remove_lines_containing(["enable_metrics"])
         self.add_lines_to_config(["enable_metrics: true"])
 
         # The default Metrics Flags are off by default.
@@ -131,6 +137,11 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
         [
             "turn_shared_secret_path: /does/not/exist",
             "registration_shared_secret_path: /does/not/exist",
+            "macaroon_secret_key_path: /does/not/exist",
+            "form_secret_path: /does/not/exist",
+            "worker_replication_secret_path: /does/not/exist",
+            "experimental_features:\n  msc3861:\n    client_secret_path: /does/not/exist",
+            "experimental_features:\n  msc3861:\n    admin_token_path: /does/not/exist",
             *["redis:\n  enabled: true\n  password_path: /does/not/exist"]
             * (hiredis is not None),
         ]
@@ -146,16 +157,36 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
         [
             (
                 "turn_shared_secret_path: {}",
-                lambda c: c.voip.turn_shared_secret,
+                lambda c: c.voip.turn_shared_secret.encode("utf-8"),
             ),
             (
                 "registration_shared_secret_path: {}",
-                lambda c: c.registration.registration_shared_secret,
+                lambda c: c.registration.registration_shared_secret.encode("utf-8"),
+            ),
+            (
+                "macaroon_secret_key_path: {}",
+                lambda c: c.key.macaroon_secret_key,
+            ),
+            (
+                "form_secret_path: {}",
+                lambda c: c.key.form_secret.encode("utf-8"),
+            ),
+            (
+                "worker_replication_secret_path: {}",
+                lambda c: c.worker.worker_replication_secret.encode("utf-8"),
+            ),
+            (
+                "experimental_features:\n  msc3861:\n    client_secret_path: {}",
+                lambda c: c.experimental.msc3861.client_secret().encode("utf-8"),
+            ),
+            (
+                "experimental_features:\n  msc3861:\n    admin_token_path: {}",
+                lambda c: c.experimental.msc3861.admin_token().encode("utf-8"),
             ),
             *[
                 (
                     "redis:\n  enabled: true\n  password_path: {}",
-                    lambda c: c.redis.redis_password,
+                    lambda c: c.redis.redis_password.encode("utf-8"),
                 )
             ]
             * (hiredis is not None),
@@ -164,11 +195,111 @@ class ConfigLoadingFileTestCase(ConfigFileTestCase):
     def test_secret_files_existing(
         self, config_line: str, get_secret: Callable[[RootConfig], str]
     ) -> None:
-        self.generate_config_and_remove_lines_containing("registration_shared_secret")
+        self.generate_config_and_remove_lines_containing(
+            ["form_secret", "macaroon_secret_key", "registration_shared_secret"]
+        )
         with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
             secret_file.write(b"53C237")
 
             self.add_lines_to_config(["", config_line.format(secret_file.name)])
             config = HomeServerConfig.load_config("", ["-c", self.config_file])
 
-            self.assertEqual(get_secret(config), "53C237")
+            self.assertEqual(get_secret(config), b"53C237")
+
+    @parameterized.expand(
+        [
+            "turn_shared_secret: 53C237",
+            "registration_shared_secret: 53C237",
+            "macaroon_secret_key: 53C237",
+            "recaptcha_private_key: 53C237",
+            "recaptcha_public_key: ¬53C237",
+            "form_secret: 53C237",
+            "worker_replication_secret: 53C237",
+            *[
+                "experimental_features:\n"
+                "  msc3861:\n"
+                "    enabled: true\n"
+                "    client_secret: 53C237"
+            ]
+            * (authlib is not None),
+            *[
+                "experimental_features:\n"
+                "  msc3861:\n"
+                "    enabled: true\n"
+                "    client_auth_method: private_key_jwt\n"
+                '    jwk: {{"mock": "mock"}}'
+            ]
+            * (authlib is not None),
+            *[
+                "experimental_features:\n"
+                "  msc3861:\n"
+                "    enabled: true\n"
+                "    admin_token: 53C237\n"
+                "    client_secret_path: {secret_file}"
+            ]
+            * (authlib is not None),
+            *["redis:\n  enabled: true\n  password: 53C237"] * (hiredis is not None),
+        ]
+    )
+    def test_no_secrets_in_config(self, config_line: str) -> None:
+        if authlib is not None:
+            patcher = mock.patch("authlib.jose.rfc7517.JsonWebKey.import_key")
+            self.addCleanup(patcher.stop)
+            patcher.start()
+
+        with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
+            # Only used for less mocking with admin_token
+            secret_file.write(b"53C237")
+
+            self.generate_config_and_remove_lines_containing(
+                ["form_secret", "macaroon_secret_key", "registration_shared_secret"]
+            )
+            # Check strict mode with no offenders.
+            HomeServerConfig.load_config(
+                "", ["-c", self.config_file, "--no-secrets-in-config"]
+            )
+            self.add_lines_to_config(
+                ["", config_line.format(secret_file=secret_file.name)]
+            )
+            # Check strict mode with a single offender.
+            with self.assertRaises(ConfigError):
+                HomeServerConfig.load_config(
+                    "", ["-c", self.config_file, "--no-secrets-in-config"]
+                )
+
+            # Check lenient mode with a single offender.
+            HomeServerConfig.load_config("", ["-c", self.config_file])
+
+    def test_no_secrets_in_config_but_in_files(self) -> None:
+        with tempfile.NamedTemporaryFile(buffering=0) as secret_file:
+            secret_file.write(b"53C237")
+
+            self.generate_config_and_remove_lines_containing(
+                ["form_secret", "macaroon_secret_key", "registration_shared_secret"]
+            )
+            self.add_lines_to_config(
+                [
+                    "",
+                    f"turn_shared_secret_path: {secret_file.name}",
+                    f"registration_shared_secret_path: {secret_file.name}",
+                    f"macaroon_secret_key_path: {secret_file.name}",
+                    f"recaptcha_private_key_path: {secret_file.name}",
+                    f"recaptcha_public_key_path: {secret_file.name}",
+                    f"form_secret_path: {secret_file.name}",
+                    f"worker_replication_secret_path: {secret_file.name}",
+                    *[
+                        "experimental_features:\n"
+                        "  msc3861:\n"
+                        "    enabled: true\n"
+                        f"    admin_token_path: {secret_file.name}\n"
+                        f"    client_secret_path: {secret_file.name}\n"
+                        # f"    jwk_path: {secret_file.name}"
+                    ]
+                    * (authlib is not None),
+                    *[f"redis:\n  enabled: true\n  password_path: {secret_file.name}"]
+                    * (hiredis is not None),
+                ]
+            )
+            HomeServerConfig.load_config(
+                "", ["-c", self.config_file, "--no-secrets-in-config"]
+            )
diff --git a/tests/config/test_workers.py b/tests/config/test_workers.py
index 64c0285d01..3a21975b89 100644
--- a/tests/config/test_workers.py
+++ b/tests/config/test_workers.py
@@ -47,7 +47,7 @@ class WorkerDutyConfigTestCase(TestCase):
             "worker_app": worker_app,
             **extras,
         }
-        worker_config.read_config(worker_config_dict)
+        worker_config.read_config(worker_config_dict, allow_secrets_in_config=True)
         return worker_config
 
     def test_old_configs_master(self) -> None:
diff --git a/tests/config/utils.py b/tests/config/utils.py
index 11140ff979..3cba4ac588 100644
--- a/tests/config/utils.py
+++ b/tests/config/utils.py
@@ -51,12 +51,13 @@ class ConfigFileTestCase(unittest.TestCase):
                 ],
             )
 
-    def generate_config_and_remove_lines_containing(self, needle: str) -> None:
+    def generate_config_and_remove_lines_containing(self, needles: list[str]) -> None:
         self.generate_config()
 
         with open(self.config_file) as f:
             contents = f.readlines()
-        contents = [line for line in contents if needle not in line]
+        for needle in needles:
+            contents = [line for line in contents if needle not in line]
         with open(self.config_file, "w") as f:
             f.write("".join(contents))
 
diff --git a/tests/events/test_auto_accept_invites.py b/tests/events/test_auto_accept_invites.py
index 7fb4d4fa90..d4e87b1b7f 100644
--- a/tests/events/test_auto_accept_invites.py
+++ b/tests/events/test_auto_accept_invites.py
@@ -39,7 +39,7 @@ from synapse.module_api import ModuleApi
 from synapse.rest import admin
 from synapse.rest.client import login, room
 from synapse.server import HomeServer
-from synapse.types import StreamToken, create_requester
+from synapse.types import StreamToken, UserID, UserInfo, create_requester
 from synapse.util import Clock
 
 from tests.handlers.test_sync import generate_sync_config
@@ -349,6 +349,169 @@ class AutoAcceptInvitesTestCase(FederatingHomeserverTestCase):
             join_updates, _ = sync_join(self, invited_user_id)
             self.assertEqual(len(join_updates), 0)
 
+    @override_config(
+        {
+            "auto_accept_invites": {
+                "enabled": True,
+            },
+        }
+    )
+    async def test_ignore_invite_for_missing_user(self) -> None:
+        """Tests that receiving an invite for a missing user is ignored."""
+        inviting_user_id = self.register_user("inviter", "pass")
+        inviting_user_tok = self.login("inviter", "pass")
+
+        # A local user who receives an invite
+        invited_user_id = "@fake:" + self.hs.config.server.server_name
+
+        # Create a room and send an invite to the other user
+        room_id = self.helper.create_room_as(
+            inviting_user_id,
+            tok=inviting_user_tok,
+        )
+
+        self.helper.invite(
+            room_id,
+            inviting_user_id,
+            invited_user_id,
+            tok=inviting_user_tok,
+        )
+
+        join_updates, _ = sync_join(self, inviting_user_id)
+        # Assert that the last event in the room was not a member event for the target user.
+        self.assertEqual(
+            join_updates[0].timeline.events[-1].content["membership"], "invite"
+        )
+
+    @override_config(
+        {
+            "auto_accept_invites": {
+                "enabled": True,
+            },
+        }
+    )
+    async def test_ignore_invite_for_deactivated_user(self) -> None:
+        """Tests that receiving an invite for a deactivated user is ignored."""
+        inviting_user_id = self.register_user("inviter", "pass", admin=True)
+        inviting_user_tok = self.login("inviter", "pass")
+
+        # A local user who receives an invite
+        invited_user_id = self.register_user("invitee", "pass")
+
+        # Create a room and send an invite to the other user
+        room_id = self.helper.create_room_as(
+            inviting_user_id,
+            tok=inviting_user_tok,
+        )
+
+        channel = self.make_request(
+            "PUT",
+            "/_synapse/admin/v2/users/%s" % invited_user_id,
+            {"deactivated": True},
+            access_token=inviting_user_tok,
+        )
+
+        assert channel.code == 200
+
+        self.helper.invite(
+            room_id,
+            inviting_user_id,
+            invited_user_id,
+            tok=inviting_user_tok,
+        )
+
+        join_updates, b = sync_join(self, inviting_user_id)
+        # Assert that the last event in the room was not a member event for the target user.
+        self.assertEqual(
+            join_updates[0].timeline.events[-1].content["membership"], "invite"
+        )
+
+    @override_config(
+        {
+            "auto_accept_invites": {
+                "enabled": True,
+            },
+        }
+    )
+    async def test_ignore_invite_for_suspended_user(self) -> None:
+        """Tests that receiving an invite for a suspended user is ignored."""
+        inviting_user_id = self.register_user("inviter", "pass", admin=True)
+        inviting_user_tok = self.login("inviter", "pass")
+
+        # A local user who receives an invite
+        invited_user_id = self.register_user("invitee", "pass")
+
+        # Create a room and send an invite to the other user
+        room_id = self.helper.create_room_as(
+            inviting_user_id,
+            tok=inviting_user_tok,
+        )
+
+        channel = self.make_request(
+            "PUT",
+            f"/_synapse/admin/v1/suspend/{invited_user_id}",
+            {"suspend": True},
+            access_token=inviting_user_tok,
+        )
+
+        assert channel.code == 200
+
+        self.helper.invite(
+            room_id,
+            inviting_user_id,
+            invited_user_id,
+            tok=inviting_user_tok,
+        )
+
+        join_updates, b = sync_join(self, inviting_user_id)
+        # Assert that the last event in the room was not a member event for the target user.
+        self.assertEqual(
+            join_updates[0].timeline.events[-1].content["membership"], "invite"
+        )
+
+    @override_config(
+        {
+            "auto_accept_invites": {
+                "enabled": True,
+            },
+        }
+    )
+    async def test_ignore_invite_for_locked_user(self) -> None:
+        """Tests that receiving an invite for a suspended user is ignored."""
+        inviting_user_id = self.register_user("inviter", "pass", admin=True)
+        inviting_user_tok = self.login("inviter", "pass")
+
+        # A local user who receives an invite
+        invited_user_id = self.register_user("invitee", "pass")
+
+        # Create a room and send an invite to the other user
+        room_id = self.helper.create_room_as(
+            inviting_user_id,
+            tok=inviting_user_tok,
+        )
+
+        channel = self.make_request(
+            "PUT",
+            f"/_synapse/admin/v2/users/{invited_user_id}",
+            {"locked": True},
+            access_token=inviting_user_tok,
+        )
+
+        assert channel.code == 200
+
+        self.helper.invite(
+            room_id,
+            inviting_user_id,
+            invited_user_id,
+            tok=inviting_user_tok,
+        )
+
+        join_updates, b = sync_join(self, inviting_user_id)
+        # Assert that the last event in the room was not a member event for the target user.
+        self.assertEqual(
+            join_updates[0].timeline.events[-1].content["membership"], "invite"
+        )
+
 
 _request_key = 0
 
@@ -647,6 +810,22 @@ def create_module(
     module_api.is_mine.side_effect = lambda a: a.split(":")[1] == "test"
     module_api.worker_name = worker_name
     module_api.sleep.return_value = make_multiple_awaitable(None)
+    module_api.get_userinfo_by_id.return_value = UserInfo(
+        user_id=UserID.from_string("@user:test"),
+        is_admin=False,
+        is_guest=False,
+        consent_server_notice_sent=None,
+        consent_ts=None,
+        consent_version=None,
+        appservice_id=None,
+        creation_ts=0,
+        user_type=None,
+        is_deactivated=False,
+        locked=False,
+        is_shadow_banned=False,
+        approved=True,
+        suspended=False,
+    )
 
     if config_override is None:
         config_override = {}
diff --git a/tests/federation/test_federation_devices.py b/tests/federation/test_federation_devices.py
new file mode 100644
index 0000000000..ba27e69479
--- /dev/null
+++ b/tests/federation/test_federation_devices.py
@@ -0,0 +1,161 @@
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright (C) 2024 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+# Originally licensed under the Apache License, Version 2.0:
+# <http://www.apache.org/licenses/LICENSE-2.0>.
+#
+# [This file includes modifications made by New Vector Limited]
+#
+#
+
+import logging
+from unittest.mock import AsyncMock, Mock
+
+from twisted.test.proto_helpers import MemoryReactor
+
+from synapse.handlers.device import DeviceListUpdater
+from synapse.server import HomeServer
+from synapse.types import JsonDict
+from synapse.util import Clock
+from synapse.util.retryutils import NotRetryingDestination
+
+from tests import unittest
+
+logger = logging.getLogger(__name__)
+
+
+class DeviceListResyncTestCase(unittest.HomeserverTestCase):
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.store = self.hs.get_datastores().main
+
+    def test_retry_device_list_resync(self) -> None:
+        """Tests that device lists are marked as stale if they couldn't be synced, and
+        that stale device lists are retried periodically.
+        """
+        remote_user_id = "@john:test_remote"
+        remote_origin = "test_remote"
+
+        # Track the number of attempts to resync the user's device list.
+        self.resync_attempts = 0
+
+        # When this function is called, increment the number of resync attempts (only if
+        # we're querying devices for the right user ID), then raise a
+        # NotRetryingDestination error to fail the resync gracefully.
+        def query_user_devices(
+            destination: str, user_id: str, timeout: int = 30000
+        ) -> JsonDict:
+            if user_id == remote_user_id:
+                self.resync_attempts += 1
+
+            raise NotRetryingDestination(0, 0, destination)
+
+        # Register the mock on the federation client.
+        federation_client = self.hs.get_federation_client()
+        federation_client.query_user_devices = Mock(side_effect=query_user_devices)  # type: ignore[method-assign]
+
+        # Register a mock on the store so that the incoming update doesn't fail because
+        # we don't share a room with the user.
+        self.store.get_rooms_for_user = AsyncMock(return_value=["!someroom:test"])
+
+        # Manually inject a fake device list update. We need this update to include at
+        # least one prev_id so that the user's device list will need to be retried.
+        device_list_updater = self.hs.get_device_handler().device_list_updater
+        assert isinstance(device_list_updater, DeviceListUpdater)
+        self.get_success(
+            device_list_updater.incoming_device_list_update(
+                origin=remote_origin,
+                edu_content={
+                    "deleted": False,
+                    "device_display_name": "Mobile",
+                    "device_id": "QBUAZIFURK",
+                    "prev_id": [5],
+                    "stream_id": 6,
+                    "user_id": remote_user_id,
+                },
+            )
+        )
+
+        # Check that there was one resync attempt.
+        self.assertEqual(self.resync_attempts, 1)
+
+        # Check that the resync attempt failed and caused the user's device list to be
+        # marked as stale.
+        need_resync = self.get_success(
+            self.store.get_user_ids_requiring_device_list_resync()
+        )
+        self.assertIn(remote_user_id, need_resync)
+
+        # Check that waiting for 30 seconds caused Synapse to retry resyncing the device
+        # list.
+        self.reactor.advance(30)
+        self.assertEqual(self.resync_attempts, 2)
+
+    def test_cross_signing_keys_retry(self) -> None:
+        """Tests that resyncing a device list correctly processes cross-signing keys from
+        the remote server.
+        """
+        remote_user_id = "@john:test_remote"
+        remote_master_key = "85T7JXPFBAySB/jwby4S3lBPTqY3+Zg53nYuGmu1ggY"
+        remote_self_signing_key = "QeIiFEjluPBtI7WQdG365QKZcFs9kqmHir6RBD0//nQ"
+
+        # Register mock device list retrieval on the federation client.
+        federation_client = self.hs.get_federation_client()
+        federation_client.query_user_devices = AsyncMock(  # type: ignore[method-assign]
+            return_value={
+                "user_id": remote_user_id,
+                "stream_id": 1,
+                "devices": [],
+                "master_key": {
+                    "user_id": remote_user_id,
+                    "usage": ["master"],
+                    "keys": {"ed25519:" + remote_master_key: remote_master_key},
+                },
+                "self_signing_key": {
+                    "user_id": remote_user_id,
+                    "usage": ["self_signing"],
+                    "keys": {
+                        "ed25519:" + remote_self_signing_key: remote_self_signing_key
+                    },
+                },
+            }
+        )
+
+        # Resync the device list.
+        device_handler = self.hs.get_device_handler()
+        self.get_success(
+            device_handler.device_list_updater.multi_user_device_resync(
+                [remote_user_id]
+            ),
+        )
+
+        # Retrieve the cross-signing keys for this user.
+        keys = self.get_success(
+            self.store.get_e2e_cross_signing_keys_bulk(user_ids=[remote_user_id]),
+        )
+        self.assertIn(remote_user_id, keys)
+        key = keys[remote_user_id]
+        assert key is not None
+
+        # Check that the master key is the one returned by the mock.
+        master_key = key["master"]
+        self.assertEqual(len(master_key["keys"]), 1)
+        self.assertTrue("ed25519:" + remote_master_key in master_key["keys"].keys())
+        self.assertTrue(remote_master_key in master_key["keys"].values())
+
+        # Check that the self-signing key is the one returned by the mock.
+        self_signing_key = key["self_signing"]
+        self.assertEqual(len(self_signing_key["keys"]), 1)
+        self.assertTrue(
+            "ed25519:" + remote_self_signing_key in self_signing_key["keys"].keys(),
+        )
+        self.assertTrue(remote_self_signing_key in self_signing_key["keys"].values())
diff --git a/tests/federation/test_federation_media.py b/tests/federation/test_federation_media.py
index e66aae499b..9c92003ce5 100644
--- a/tests/federation/test_federation_media.py
+++ b/tests/federation/test_federation_media.py
@@ -147,6 +147,45 @@ class FederationMediaDownloadsTest(unittest.FederatingHomeserverTestCase):
         found_file = any(SMALL_PNG in field for field in stripped_bytes)
         self.assertTrue(found_file)
 
+    def test_federation_etag(self) -> None:
+        """Test that federation ETags work"""
+
+        content = io.BytesIO(b"file_to_stream")
+        content_uri = self.get_success(
+            self.media_repo.create_content(
+                "text/plain",
+                "test_upload",
+                content,
+                46,
+                UserID.from_string("@user_id:whatever.org"),
+            )
+        )
+
+        channel = self.make_signed_federation_request(
+            "GET",
+            f"/_matrix/federation/v1/media/download/{content_uri.media_id}",
+        )
+        self.pump()
+        self.assertEqual(200, channel.code)
+
+        # We expect exactly one ETag header.
+        etags = channel.headers.getRawHeaders("ETag")
+        self.assertIsNotNone(etags)
+        assert etags is not None  # For mypy
+        self.assertEqual(len(etags), 1)
+        etag = etags[0]
+
+        # Refetching with the etag should result in 304 and empty body.
+        channel = self.make_signed_federation_request(
+            "GET",
+            f"/_matrix/federation/v1/media/download/{content_uri.media_id}",
+            custom_headers=[("If-None-Match", etag)],
+        )
+        self.pump()
+        self.assertEqual(channel.code, 304)
+        self.assertEqual(channel.is_finished(), True)
+        self.assertNotIn("body", channel.result)
+
 
 class FederationThumbnailTest(unittest.FederatingHomeserverTestCase):
     def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
diff --git a/tests/federation/test_federation_out_of_band_membership.py b/tests/federation/test_federation_out_of_band_membership.py
new file mode 100644
index 0000000000..a4a266cf06
--- /dev/null
+++ b/tests/federation/test_federation_out_of_band_membership.py
@@ -0,0 +1,671 @@
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright 2020 The Matrix.org Foundation C.I.C.
+# Copyright (C) 2023 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+# Originally licensed under the Apache License, Version 2.0:
+# <http://www.apache.org/licenses/LICENSE-2.0>.
+#
+# [This file includes modifications made by New Vector Limited]
+#
+#
+
+import logging
+import time
+import urllib.parse
+from http import HTTPStatus
+from typing import Any, Callable, Optional, Set, Tuple, TypeVar, Union
+from unittest.mock import Mock
+
+import attr
+from parameterized import parameterized
+
+from twisted.test.proto_helpers import MemoryReactor
+
+from synapse.api.constants import EventContentFields, EventTypes, Membership
+from synapse.api.room_versions import RoomVersion, RoomVersions
+from synapse.events import EventBase, make_event_from_dict
+from synapse.events.utils import strip_event
+from synapse.federation.federation_base import (
+    event_from_pdu_json,
+)
+from synapse.federation.transport.client import SendJoinResponse
+from synapse.http.matrixfederationclient import (
+    ByteParser,
+)
+from synapse.http.types import QueryParams
+from synapse.rest import admin
+from synapse.rest.client import login, room, sync
+from synapse.server import HomeServer
+from synapse.types import JsonDict, MutableStateMap, StateMap
+from synapse.types.handlers.sliding_sync import (
+    StateValues,
+)
+from synapse.util import Clock
+
+from tests import unittest
+from tests.utils import test_timeout
+
+logger = logging.getLogger(__name__)
+
+
+def required_state_json_to_state_map(required_state: Any) -> StateMap[EventBase]:
+    state_map: MutableStateMap[EventBase] = {}
+
+    # Scrutinize JSON values to ensure it's in the expected format
+    if isinstance(required_state, list):
+        for state_event_dict in required_state:
+            # Yell because we're in a test and this is unexpected
+            assert isinstance(
+                state_event_dict, dict
+            ), "`required_state` should be a list of event dicts"
+
+            event_type = state_event_dict["type"]
+            event_state_key = state_event_dict["state_key"]
+
+            # Yell because we're in a test and this is unexpected
+            assert isinstance(
+                event_type, str
+            ), "Each event in `required_state` should have a string `type`"
+            assert isinstance(
+                event_state_key, str
+            ), "Each event in `required_state` should have a string `state_key`"
+
+            state_map[(event_type, event_state_key)] = make_event_from_dict(
+                state_event_dict
+            )
+    else:
+        # Yell because we're in a test and this is unexpected
+        raise AssertionError("`required_state` should be a list of event dicts")
+
+    return state_map
+
+
+@attr.s(slots=True, auto_attribs=True)
+class RemoteRoomJoinResult:
+    remote_room_id: str
+    room_version: RoomVersion
+    remote_room_creator_user_id: str
+    local_user1_id: str
+    local_user1_tok: str
+    state_map: StateMap[EventBase]
+
+
+class OutOfBandMembershipTests(unittest.FederatingHomeserverTestCase):
+    """
+    Tests to make sure that interactions with out-of-band membership (outliers) works as
+    expected.
+
+     - invites received over federation, before we join the room
+     - *rejections* for said invites
+
+    See the "Out-of-band membership events" section in
+    `docs/development/room-dag-concepts.md` for more information.
+    """
+
+    servlets = [
+        admin.register_servlets,
+        room.register_servlets,
+        login.register_servlets,
+        sync.register_servlets,
+    ]
+
+    sync_endpoint = "/_matrix/client/unstable/org.matrix.simplified_msc3575/sync"
+
+    def default_config(self) -> JsonDict:
+        conf = super().default_config()
+        # Federation sending is disabled by default in the test environment
+        # so we need to enable it like this.
+        conf["federation_sender_instances"] = ["master"]
+
+        return conf
+
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
+        self.federation_http_client = Mock(
+            # The problem with using `spec=MatrixFederationHttpClient` here is that it
+            # requires everything to be mocked which is a lot of work that I don't want
+            # to do when the code only uses a few methods (`get_json` and `put_json`).
+        )
+        return self.setup_test_homeserver(
+            federation_http_client=self.federation_http_client
+        )
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        super().prepare(reactor, clock, hs)
+
+        self.store = self.hs.get_datastores().main
+        self.storage_controllers = hs.get_storage_controllers()
+
+    def do_sync(
+        self, sync_body: JsonDict, *, since: Optional[str] = None, tok: str
+    ) -> Tuple[JsonDict, str]:
+        """Do a sliding sync request with given body.
+
+        Asserts the request was successful.
+
+        Attributes:
+            sync_body: The full request body to use
+            since: Optional since token
+            tok: Access token to use
+
+        Returns:
+            A tuple of the response body and the `pos` field.
+        """
+
+        sync_path = self.sync_endpoint
+        if since:
+            sync_path += f"?pos={since}"
+
+        channel = self.make_request(
+            method="POST",
+            path=sync_path,
+            content=sync_body,
+            access_token=tok,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+
+        return channel.json_body, channel.json_body["pos"]
+
+    def _invite_local_user_to_remote_room_and_join(self) -> RemoteRoomJoinResult:
+        """
+        Helper to reproduce this scenario:
+
+         1. The remote user invites our local user to a room on their remote server (which
+        creates an out-of-band invite membership for user1 on our local server).
+         2. The local user notices the invite from `/sync`.
+         3. The local user joins the room.
+         4. The local user can see that they are now joined to the room from `/sync`.
+        """
+
+        # Create a local user
+        local_user1_id = self.register_user("user1", "pass")
+        local_user1_tok = self.login(local_user1_id, "pass")
+
+        # Create a remote room
+        room_creator_user_id = f"@remote-user:{self.OTHER_SERVER_NAME}"
+        remote_room_id = f"!remote-room:{self.OTHER_SERVER_NAME}"
+        room_version = RoomVersions.V10
+
+        room_create_event = make_event_from_dict(
+            self.add_hashes_and_signatures_from_other_server(
+                {
+                    "room_id": remote_room_id,
+                    "sender": room_creator_user_id,
+                    "depth": 1,
+                    "origin_server_ts": 1,
+                    "type": EventTypes.Create,
+                    "state_key": "",
+                    "content": {
+                        # The `ROOM_CREATOR` field could be removed if we used a room
+                        # version > 10 (in favor of relying on `sender`)
+                        EventContentFields.ROOM_CREATOR: room_creator_user_id,
+                        EventContentFields.ROOM_VERSION: room_version.identifier,
+                    },
+                    "auth_events": [],
+                    "prev_events": [],
+                }
+            ),
+            room_version=room_version,
+        )
+
+        creator_membership_event = make_event_from_dict(
+            self.add_hashes_and_signatures_from_other_server(
+                {
+                    "room_id": remote_room_id,
+                    "sender": room_creator_user_id,
+                    "depth": 2,
+                    "origin_server_ts": 2,
+                    "type": EventTypes.Member,
+                    "state_key": room_creator_user_id,
+                    "content": {"membership": Membership.JOIN},
+                    "auth_events": [room_create_event.event_id],
+                    "prev_events": [room_create_event.event_id],
+                }
+            ),
+            room_version=room_version,
+        )
+
+        # From the remote homeserver, invite user1 on the local homserver
+        user1_invite_membership_event = make_event_from_dict(
+            self.add_hashes_and_signatures_from_other_server(
+                {
+                    "room_id": remote_room_id,
+                    "sender": room_creator_user_id,
+                    "depth": 3,
+                    "origin_server_ts": 3,
+                    "type": EventTypes.Member,
+                    "state_key": local_user1_id,
+                    "content": {"membership": Membership.INVITE},
+                    "auth_events": [
+                        room_create_event.event_id,
+                        creator_membership_event.event_id,
+                    ],
+                    "prev_events": [creator_membership_event.event_id],
+                }
+            ),
+            room_version=room_version,
+        )
+        channel = self.make_signed_federation_request(
+            "PUT",
+            f"/_matrix/federation/v2/invite/{remote_room_id}/{user1_invite_membership_event.event_id}",
+            content={
+                "event": user1_invite_membership_event.get_dict(),
+                "invite_room_state": [
+                    strip_event(room_create_event),
+                ],
+                "room_version": room_version.identifier,
+            },
+        )
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
+
+        sync_body = {
+            "lists": {
+                "foo-list": {
+                    "ranges": [[0, 1]],
+                    "required_state": [(EventTypes.Member, StateValues.WILDCARD)],
+                    "timeline_limit": 0,
+                }
+            }
+        }
+
+        # Sync until the local user1 can see the invite
+        with test_timeout(
+            3,
+            "Unable to find user1's invite event in the room",
+        ):
+            while True:
+                response_body, _ = self.do_sync(sync_body, tok=local_user1_tok)
+                if (
+                    remote_room_id in response_body["rooms"].keys()
+                    # If they have `invite_state` for the room, they are invited
+                    and len(
+                        response_body["rooms"][remote_room_id].get("invite_state", [])
+                    )
+                    > 0
+                ):
+                    break
+
+                # Prevent tight-looping to allow the `test_timeout` to work
+                time.sleep(0.1)
+
+        user1_join_membership_event_template = make_event_from_dict(
+            {
+                "room_id": remote_room_id,
+                "sender": local_user1_id,
+                "depth": 4,
+                "origin_server_ts": 4,
+                "type": EventTypes.Member,
+                "state_key": local_user1_id,
+                "content": {"membership": Membership.JOIN},
+                "auth_events": [
+                    room_create_event.event_id,
+                    user1_invite_membership_event.event_id,
+                ],
+                "prev_events": [user1_invite_membership_event.event_id],
+            },
+            room_version=room_version,
+        )
+
+        T = TypeVar("T")
+
+        # Mock the remote homeserver responding to our HTTP requests
+        #
+        # We're going to mock the following endpoints so that user1 can join the remote room:
+        # - GET /_matrix/federation/v1/make_join/{room_id}/{user_id}
+        # - PUT /_matrix/federation/v2/send_join/{room_id}/{user_id}
+        #
+        async def get_json(
+            destination: str,
+            path: str,
+            args: Optional[QueryParams] = None,
+            retry_on_dns_fail: bool = True,
+            timeout: Optional[int] = None,
+            ignore_backoff: bool = False,
+            try_trailing_slash_on_400: bool = False,
+            parser: Optional[ByteParser[T]] = None,
+        ) -> Union[JsonDict, T]:
+            if (
+                path
+                == f"/_matrix/federation/v1/make_join/{urllib.parse.quote_plus(remote_room_id)}/{urllib.parse.quote_plus(local_user1_id)}"
+            ):
+                return {
+                    "event": user1_join_membership_event_template.get_pdu_json(),
+                    "room_version": room_version.identifier,
+                }
+
+            raise NotImplementedError(
+                "We have not mocked a response for `get_json(...)` for the following endpoint yet: "
+                + f"{destination}{path}"
+            )
+
+        self.federation_http_client.get_json.side_effect = get_json
+
+        # PDU's that hs1 sent to hs2
+        collected_pdus_from_hs1_federation_send: Set[str] = set()
+
+        async def put_json(
+            destination: str,
+            path: str,
+            args: Optional[QueryParams] = None,
+            data: Optional[JsonDict] = None,
+            json_data_callback: Optional[Callable[[], JsonDict]] = None,
+            long_retries: bool = False,
+            timeout: Optional[int] = None,
+            ignore_backoff: bool = False,
+            backoff_on_404: bool = False,
+            try_trailing_slash_on_400: bool = False,
+            parser: Optional[ByteParser[T]] = None,
+            backoff_on_all_error_codes: bool = False,
+        ) -> Union[JsonDict, T, SendJoinResponse]:
+            if (
+                path.startswith(
+                    f"/_matrix/federation/v2/send_join/{urllib.parse.quote_plus(remote_room_id)}/"
+                )
+                and data is not None
+                and data.get("type") == EventTypes.Member
+                and data.get("state_key") == local_user1_id
+                # We're assuming this is a `ByteParser[SendJoinResponse]`
+                and parser is not None
+            ):
+                # As the remote server, we need to sign the event before sending it back
+                user1_join_membership_event_signed = make_event_from_dict(
+                    self.add_hashes_and_signatures_from_other_server(data),
+                    room_version=room_version,
+                )
+
+                # Since they passed in a `parser`, we need to return the type that
+                # they're expecting instead of just a `JsonDict`
+                return SendJoinResponse(
+                    auth_events=[
+                        room_create_event,
+                        user1_invite_membership_event,
+                    ],
+                    state=[
+                        room_create_event,
+                        creator_membership_event,
+                        user1_invite_membership_event,
+                    ],
+                    event_dict=user1_join_membership_event_signed.get_pdu_json(),
+                    event=user1_join_membership_event_signed,
+                    members_omitted=False,
+                    servers_in_room=[
+                        self.OTHER_SERVER_NAME,
+                    ],
+                )
+
+            if path.startswith("/_matrix/federation/v1/send/") and data is not None:
+                for pdu in data.get("pdus", []):
+                    event = event_from_pdu_json(pdu, room_version)
+                    collected_pdus_from_hs1_federation_send.add(event.event_id)
+
+                # Just acknowledge everything hs1 is trying to send hs2
+                return {
+                    event_from_pdu_json(pdu, room_version).event_id: {}
+                    for pdu in data.get("pdus", [])
+                }
+
+            raise NotImplementedError(
+                "We have not mocked a response for `put_json(...)` for the following endpoint yet: "
+                + f"{destination}{path} with the following body data: {data}"
+            )
+
+        self.federation_http_client.put_json.side_effect = put_json
+
+        # User1 joins the room
+        self.helper.join(remote_room_id, local_user1_id, tok=local_user1_tok)
+
+        # Reset the mocks now that user1 has joined the room
+        self.federation_http_client.get_json.side_effect = None
+        self.federation_http_client.put_json.side_effect = None
+
+        # Sync until the local user1 can see that they are now joined to the room
+        with test_timeout(
+            3,
+            "Unable to find user1's join event in the room",
+        ):
+            while True:
+                response_body, _ = self.do_sync(sync_body, tok=local_user1_tok)
+                if remote_room_id in response_body["rooms"].keys():
+                    required_state_map = required_state_json_to_state_map(
+                        response_body["rooms"][remote_room_id]["required_state"]
+                    )
+                    if (
+                        required_state_map.get((EventTypes.Member, local_user1_id))
+                        is not None
+                    ):
+                        break
+
+                # Prevent tight-looping to allow the `test_timeout` to work
+                time.sleep(0.1)
+
+        # Nothing needs to be sent from hs1 to hs2 since we already let the other
+        # homeserver know by doing the `/make_join` and `/send_join` dance.
+        self.assertIncludes(
+            collected_pdus_from_hs1_federation_send,
+            set(),
+            exact=True,
+            message="Didn't expect any events to be sent from hs1 over federation to hs2",
+        )
+
+        return RemoteRoomJoinResult(
+            remote_room_id=remote_room_id,
+            room_version=room_version,
+            remote_room_creator_user_id=room_creator_user_id,
+            local_user1_id=local_user1_id,
+            local_user1_tok=local_user1_tok,
+            state_map=self.get_success(
+                self.storage_controllers.state.get_current_state(remote_room_id)
+            ),
+        )
+
+    def test_can_join_from_out_of_band_invite(self) -> None:
+        """
+        Test to make sure that we can join a room that we were invited to over
+        federation; even if our server has never participated in the room before.
+        """
+        self._invite_local_user_to_remote_room_and_join()
+
+    @parameterized.expand(
+        [("accept invite", Membership.JOIN), ("reject invite", Membership.LEAVE)]
+    )
+    def test_can_x_from_out_of_band_invite_after_we_are_already_participating_in_the_room(
+        self, _test_description: str, membership_action: str
+    ) -> None:
+        """
+        Test to make sure that we can do either a) join the room (accept the invite) or
+        b) reject the invite after being invited to over federation; even if we are
+        already participating in the room.
+
+        This is a regression test to make sure we stress the scenario where even though
+        we are already participating in the room, local users can still react to invites
+        regardless of whether the remote server has told us about the invite event (via
+        a federation `/send` transaction) and we have de-outliered the invite event.
+        Previously, we would mistakenly throw an error saying the user wasn't in the
+        room when they tried to join or reject the invite.
+        """
+        remote_room_join_result = self._invite_local_user_to_remote_room_and_join()
+        remote_room_id = remote_room_join_result.remote_room_id
+        room_version = remote_room_join_result.room_version
+
+        # Create another local user
+        local_user2_id = self.register_user("user2", "pass")
+        local_user2_tok = self.login(local_user2_id, "pass")
+
+        T = TypeVar("T")
+
+        # PDU's that hs1 sent to hs2
+        collected_pdus_from_hs1_federation_send: Set[str] = set()
+
+        async def put_json(
+            destination: str,
+            path: str,
+            args: Optional[QueryParams] = None,
+            data: Optional[JsonDict] = None,
+            json_data_callback: Optional[Callable[[], JsonDict]] = None,
+            long_retries: bool = False,
+            timeout: Optional[int] = None,
+            ignore_backoff: bool = False,
+            backoff_on_404: bool = False,
+            try_trailing_slash_on_400: bool = False,
+            parser: Optional[ByteParser[T]] = None,
+            backoff_on_all_error_codes: bool = False,
+        ) -> Union[JsonDict, T]:
+            if path.startswith("/_matrix/federation/v1/send/") and data is not None:
+                for pdu in data.get("pdus", []):
+                    event = event_from_pdu_json(pdu, room_version)
+                    collected_pdus_from_hs1_federation_send.add(event.event_id)
+
+                # Just acknowledge everything hs1 is trying to send hs2
+                return {
+                    event_from_pdu_json(pdu, room_version).event_id: {}
+                    for pdu in data.get("pdus", [])
+                }
+
+            raise NotImplementedError(
+                "We have not mocked a response for `put_json(...)` for the following endpoint yet: "
+                + f"{destination}{path} with the following body data: {data}"
+            )
+
+        self.federation_http_client.put_json.side_effect = put_json
+
+        # From the remote homeserver, invite user2 on the local homserver
+        user2_invite_membership_event = make_event_from_dict(
+            self.add_hashes_and_signatures_from_other_server(
+                {
+                    "room_id": remote_room_id,
+                    "sender": remote_room_join_result.remote_room_creator_user_id,
+                    "depth": 5,
+                    "origin_server_ts": 5,
+                    "type": EventTypes.Member,
+                    "state_key": local_user2_id,
+                    "content": {"membership": Membership.INVITE},
+                    "auth_events": [
+                        remote_room_join_result.state_map[
+                            (EventTypes.Create, "")
+                        ].event_id,
+                        remote_room_join_result.state_map[
+                            (
+                                EventTypes.Member,
+                                remote_room_join_result.remote_room_creator_user_id,
+                            )
+                        ].event_id,
+                    ],
+                    "prev_events": [
+                        remote_room_join_result.state_map[
+                            (EventTypes.Member, remote_room_join_result.local_user1_id)
+                        ].event_id
+                    ],
+                }
+            ),
+            room_version=room_version,
+        )
+        channel = self.make_signed_federation_request(
+            "PUT",
+            f"/_matrix/federation/v2/invite/{remote_room_id}/{user2_invite_membership_event.event_id}",
+            content={
+                "event": user2_invite_membership_event.get_dict(),
+                "invite_room_state": [
+                    strip_event(
+                        remote_room_join_result.state_map[(EventTypes.Create, "")]
+                    ),
+                ],
+                "room_version": room_version.identifier,
+            },
+        )
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
+
+        sync_body = {
+            "lists": {
+                "foo-list": {
+                    "ranges": [[0, 1]],
+                    "required_state": [(EventTypes.Member, StateValues.WILDCARD)],
+                    "timeline_limit": 0,
+                }
+            }
+        }
+
+        # Sync until the local user2 can see the invite
+        with test_timeout(
+            3,
+            "Unable to find user2's invite event in the room",
+        ):
+            while True:
+                response_body, _ = self.do_sync(sync_body, tok=local_user2_tok)
+                if (
+                    remote_room_id in response_body["rooms"].keys()
+                    # If they have `invite_state` for the room, they are invited
+                    and len(
+                        response_body["rooms"][remote_room_id].get("invite_state", [])
+                    )
+                    > 0
+                ):
+                    break
+
+                # Prevent tight-looping to allow the `test_timeout` to work
+                time.sleep(0.1)
+
+        if membership_action == Membership.JOIN:
+            # User2 joins the room
+            join_event = self.helper.join(
+                remote_room_join_result.remote_room_id,
+                local_user2_id,
+                tok=local_user2_tok,
+            )
+            expected_pdu_event_id = join_event["event_id"]
+        elif membership_action == Membership.LEAVE:
+            # User2 rejects the invite
+            leave_event = self.helper.leave(
+                remote_room_join_result.remote_room_id,
+                local_user2_id,
+                tok=local_user2_tok,
+            )
+            expected_pdu_event_id = leave_event["event_id"]
+        else:
+            raise NotImplementedError(
+                "This test does not support this membership action yet"
+            )
+
+        # Sync until the local user2 can see their new membership in the room
+        with test_timeout(
+            3,
+            "Unable to find user2's new membership event in the room",
+        ):
+            while True:
+                response_body, _ = self.do_sync(sync_body, tok=local_user2_tok)
+                if membership_action == Membership.JOIN:
+                    if remote_room_id in response_body["rooms"].keys():
+                        required_state_map = required_state_json_to_state_map(
+                            response_body["rooms"][remote_room_id]["required_state"]
+                        )
+                        if (
+                            required_state_map.get((EventTypes.Member, local_user2_id))
+                            is not None
+                        ):
+                            break
+                elif membership_action == Membership.LEAVE:
+                    if remote_room_id not in response_body["rooms"].keys():
+                        break
+                else:
+                    raise NotImplementedError(
+                        "This test does not support this membership action yet"
+                    )
+
+                # Prevent tight-looping to allow the `test_timeout` to work
+                time.sleep(0.1)
+
+        # Make sure that we let hs2 know about the new membership event
+        self.assertIncludes(
+            collected_pdus_from_hs1_federation_send,
+            {expected_pdu_event_id},
+            exact=True,
+            message="Expected to find the event ID of the user2 membership to be sent from hs1 over federation to hs2",
+        )
diff --git a/tests/federation/test_federation_sender.py b/tests/federation/test_federation_sender.py
index 6a8887fe74..cd906bbbc7 100644
--- a/tests/federation/test_federation_sender.py
+++ b/tests/federation/test_federation_sender.py
@@ -34,6 +34,7 @@ from synapse.handlers.device import DeviceHandler
 from synapse.rest import admin
 from synapse.rest.client import login
 from synapse.server import HomeServer
+from synapse.storage.databases.main.events_worker import EventMetadata
 from synapse.types import JsonDict, ReadReceipt
 from synapse.util import Clock
 
@@ -55,12 +56,15 @@ class FederationSenderReceiptsTestCases(HomeserverTestCase):
             federation_transport_client=self.federation_transport_client,
         )
 
-        hs.get_storage_controllers().state.get_current_hosts_in_room = AsyncMock(  # type: ignore[method-assign]
+        self.main_store = hs.get_datastores().main
+        self.state_controller = hs.get_storage_controllers().state
+
+        self.state_controller.get_current_hosts_in_room = AsyncMock(  # type: ignore[method-assign]
             return_value={"test", "host2"}
         )
 
-        hs.get_storage_controllers().state.get_current_hosts_in_room_or_partial_state_approximation = (  # type: ignore[method-assign]
-            hs.get_storage_controllers().state.get_current_hosts_in_room
+        self.state_controller.get_current_hosts_in_room_or_partial_state_approximation = (  # type: ignore[method-assign]
+            self.state_controller.get_current_hosts_in_room
         )
 
         return hs
@@ -185,12 +189,15 @@ class FederationSenderReceiptsTestCases(HomeserverTestCase):
             ],
         )
 
-    def test_send_receipts_with_backoff(self) -> None:
-        """Send two receipts in quick succession; the second should be flushed, but
-        only after 20ms"""
+    def test_send_receipts_with_backoff_small_room(self) -> None:
+        """Read receipt in small rooms should not be delayed"""
         mock_send_transaction = self.federation_transport_client.send_transaction
         mock_send_transaction.return_value = {}
 
+        self.state_controller.get_current_hosts_in_room_or_partial_state_approximation = AsyncMock(  # type: ignore[method-assign]
+            return_value={"test", "host2"}
+        )
+
         sender = self.hs.get_federation_sender()
         receipt = ReadReceipt(
             "room_id",
@@ -206,7 +213,104 @@ class FederationSenderReceiptsTestCases(HomeserverTestCase):
 
         # expect a call to send_transaction
         mock_send_transaction.assert_called_once()
-        json_cb = mock_send_transaction.call_args[0][1]
+        self._assert_edu_in_call(mock_send_transaction.call_args[0][1])
+
+    def test_send_receipts_with_backoff_recent_event(self) -> None:
+        """Read receipt for a recent message should not be delayed"""
+        mock_send_transaction = self.federation_transport_client.send_transaction
+        mock_send_transaction.return_value = {}
+
+        # Pretend this is a big room
+        self.state_controller.get_current_hosts_in_room_or_partial_state_approximation = AsyncMock(  # type: ignore[method-assign]
+            return_value={"test"} | {f"host{i}" for i in range(20)}
+        )
+
+        self.main_store.get_metadata_for_event = AsyncMock(
+            return_value=EventMetadata(
+                received_ts=self.clock.time_msec(),
+                sender="@test:test",
+            )
+        )
+
+        sender = self.hs.get_federation_sender()
+        receipt = ReadReceipt(
+            "room_id",
+            "m.read",
+            "user_id",
+            ["event_id"],
+            thread_id=None,
+            data={"ts": 1234},
+        )
+        self.get_success(sender.send_read_receipt(receipt))
+
+        self.pump()
+
+        # expect a call to send_transaction for each host
+        self.assertEqual(mock_send_transaction.call_count, 20)
+        self._assert_edu_in_call(mock_send_transaction.call_args.args[1])
+
+        mock_send_transaction.reset_mock()
+
+    def test_send_receipts_with_backoff_sender(self) -> None:
+        """Read receipt for a message should not be delayed to the sender, but
+        is delayed to everyone else"""
+        mock_send_transaction = self.federation_transport_client.send_transaction
+        mock_send_transaction.return_value = {}
+
+        # Pretend this is a big room
+        self.state_controller.get_current_hosts_in_room_or_partial_state_approximation = AsyncMock(  # type: ignore[method-assign]
+            return_value={"test"} | {f"host{i}" for i in range(20)}
+        )
+
+        self.main_store.get_metadata_for_event = AsyncMock(
+            return_value=EventMetadata(
+                received_ts=self.clock.time_msec() - 5 * 60_000,
+                sender="@test:host1",
+            )
+        )
+
+        sender = self.hs.get_federation_sender()
+        receipt = ReadReceipt(
+            "room_id",
+            "m.read",
+            "user_id",
+            ["event_id"],
+            thread_id=None,
+            data={"ts": 1234},
+        )
+        self.get_success(sender.send_read_receipt(receipt))
+
+        self.pump()
+
+        # First, expect a call to send_transaction for the sending host
+        mock_send_transaction.assert_called()
+
+        transaction = mock_send_transaction.call_args_list[0].args[0]
+        self.assertEqual(transaction.destination, "host1")
+        self._assert_edu_in_call(mock_send_transaction.call_args_list[0].args[1])
+
+        # We also expect a call to one of the other hosts, as the first
+        # destination to wake up.
+        self.assertEqual(mock_send_transaction.call_count, 2)
+        self._assert_edu_in_call(mock_send_transaction.call_args.args[1])
+
+        mock_send_transaction.reset_mock()
+
+        # We now expect to see 18 more transactions to the remaining hosts
+        # periodically.
+        for _ in range(18):
+            self.reactor.advance(
+                1.0
+                / self.hs.config.ratelimiting.federation_rr_transactions_per_room_per_second
+            )
+
+            mock_send_transaction.assert_called_once()
+            self._assert_edu_in_call(mock_send_transaction.call_args.args[1])
+            mock_send_transaction.reset_mock()
+
+    def _assert_edu_in_call(self, json_cb: Callable[[], JsonDict]) -> None:
+        """Assert that the given `json_cb` from a `send_transaction` has a
+        receipt in it."""
         data = json_cb()
         self.assertEqual(
             data["edus"],
@@ -226,46 +330,6 @@ class FederationSenderReceiptsTestCases(HomeserverTestCase):
                 }
             ],
         )
-        mock_send_transaction.reset_mock()
-
-        # send the second RR
-        receipt = ReadReceipt(
-            "room_id",
-            "m.read",
-            "user_id",
-            ["other_id"],
-            thread_id=None,
-            data={"ts": 1234},
-        )
-        self.successResultOf(defer.ensureDeferred(sender.send_read_receipt(receipt)))
-        self.pump()
-        mock_send_transaction.assert_not_called()
-
-        self.reactor.advance(19)
-        mock_send_transaction.assert_not_called()
-
-        self.reactor.advance(10)
-        mock_send_transaction.assert_called_once()
-        json_cb = mock_send_transaction.call_args[0][1]
-        data = json_cb()
-        self.assertEqual(
-            data["edus"],
-            [
-                {
-                    "edu_type": EduTypes.RECEIPT,
-                    "content": {
-                        "room_id": {
-                            "m.read": {
-                                "user_id": {
-                                    "event_ids": ["other_id"],
-                                    "data": {"ts": 1234},
-                                }
-                            }
-                        }
-                    },
-                }
-            ],
-        )
 
 
 class FederationSenderPresenceTestCases(HomeserverTestCase):
diff --git a/tests/federation/test_federation_server.py b/tests/federation/test_federation_server.py
index 88261450b1..42dc844734 100644
--- a/tests/federation/test_federation_server.py
+++ b/tests/federation/test_federation_server.py
@@ -20,14 +20,21 @@
 #
 import logging
 from http import HTTPStatus
+from typing import Optional, Union
+from unittest.mock import Mock
 
 from parameterized import parameterized
 
 from twisted.test.proto_helpers import MemoryReactor
 
-from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
+from synapse.api.constants import EventTypes, Membership
+from synapse.api.errors import FederationError
+from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersions
 from synapse.config.server import DEFAULT_ROOM_VERSION
 from synapse.events import EventBase, make_event_from_dict
+from synapse.federation.federation_base import event_from_pdu_json
+from synapse.http.types import QueryParams
+from synapse.logging.context import LoggingContext
 from synapse.rest import admin
 from synapse.rest.client import login, room
 from synapse.server import HomeServer
@@ -85,6 +92,163 @@ class FederationServerTests(unittest.FederatingHomeserverTestCase):
         self.assertEqual(500, channel.code, channel.result)
 
 
+def _create_acl_event(content: JsonDict) -> EventBase:
+    return make_event_from_dict(
+        {
+            "room_id": "!a:b",
+            "event_id": "$a:b",
+            "type": "m.room.server_acls",
+            "sender": "@a:b",
+            "content": content,
+        }
+    )
+
+
+class MessageAcceptTests(unittest.FederatingHomeserverTestCase):
+    """
+    Tests to make sure that we don't accept flawed events from federation (incoming).
+    """
+
+    servlets = [
+        admin.register_servlets,
+        login.register_servlets,
+        room.register_servlets,
+    ]
+
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
+        self.http_client = Mock()
+        return self.setup_test_homeserver(federation_http_client=self.http_client)
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        super().prepare(reactor, clock, hs)
+
+        self.store = self.hs.get_datastores().main
+        self.storage_controllers = hs.get_storage_controllers()
+        self.federation_event_handler = self.hs.get_federation_event_handler()
+
+        # Create a local room
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        self.room_id = self.helper.create_room_as(
+            user1_id, tok=user1_tok, is_public=True
+        )
+
+        state_map = self.get_success(
+            self.storage_controllers.state.get_current_state(self.room_id)
+        )
+
+        # Figure out what the forward extremities in the room are (the most recent
+        # events that aren't tied into the DAG)
+        forward_extremity_event_ids = self.get_success(
+            self.hs.get_datastores().main.get_latest_event_ids_in_room(self.room_id)
+        )
+
+        # Join a remote user to the room that will attempt to send bad events
+        self.remote_bad_user_id = f"@baduser:{self.OTHER_SERVER_NAME}"
+        self.remote_bad_user_join_event = make_event_from_dict(
+            self.add_hashes_and_signatures_from_other_server(
+                {
+                    "room_id": self.room_id,
+                    "sender": self.remote_bad_user_id,
+                    "state_key": self.remote_bad_user_id,
+                    "depth": 1000,
+                    "origin_server_ts": 1,
+                    "type": EventTypes.Member,
+                    "content": {"membership": Membership.JOIN},
+                    "auth_events": [
+                        state_map[(EventTypes.Create, "")].event_id,
+                        state_map[(EventTypes.JoinRules, "")].event_id,
+                    ],
+                    "prev_events": list(forward_extremity_event_ids),
+                }
+            ),
+            room_version=RoomVersions.V10,
+        )
+
+        # Send the join, it should return None (which is not an error)
+        self.assertEqual(
+            self.get_success(
+                self.federation_event_handler.on_receive_pdu(
+                    self.OTHER_SERVER_NAME, self.remote_bad_user_join_event
+                )
+            ),
+            None,
+        )
+
+        # Make sure we actually joined the room
+        self.assertEqual(
+            self.get_success(self.store.get_latest_event_ids_in_room(self.room_id)),
+            {self.remote_bad_user_join_event.event_id},
+        )
+
+    def test_cant_hide_direct_ancestors(self) -> None:
+        """
+        If you send a message, you must be able to provide the direct
+        prev_events that said event references.
+        """
+
+        async def post_json(
+            destination: str,
+            path: str,
+            data: Optional[JsonDict] = None,
+            long_retries: bool = False,
+            timeout: Optional[int] = None,
+            ignore_backoff: bool = False,
+            args: Optional[QueryParams] = None,
+        ) -> Union[JsonDict, list]:
+            # If it asks us for new missing events, give them NOTHING
+            if path.startswith("/_matrix/federation/v1/get_missing_events/"):
+                return {"events": []}
+            return {}
+
+        self.http_client.post_json = post_json
+
+        # Figure out what the forward extremities in the room are (the most recent
+        # events that aren't tied into the DAG)
+        forward_extremity_event_ids = self.get_success(
+            self.hs.get_datastores().main.get_latest_event_ids_in_room(self.room_id)
+        )
+
+        # Now lie about an event's prev_events
+        lying_event = make_event_from_dict(
+            self.add_hashes_and_signatures_from_other_server(
+                {
+                    "room_id": self.room_id,
+                    "sender": self.remote_bad_user_id,
+                    "depth": 1000,
+                    "origin_server_ts": 1,
+                    "type": "m.room.message",
+                    "content": {"body": "hewwo?"},
+                    "auth_events": [],
+                    "prev_events": ["$missing_prev_event"]
+                    + list(forward_extremity_event_ids),
+                }
+            ),
+            room_version=RoomVersions.V10,
+        )
+
+        with LoggingContext("test-context"):
+            failure = self.get_failure(
+                self.federation_event_handler.on_receive_pdu(
+                    self.OTHER_SERVER_NAME, lying_event
+                ),
+                FederationError,
+            )
+
+        # on_receive_pdu should throw an error
+        self.assertEqual(
+            failure.value.args[0],
+            (
+                "ERROR 403: Your server isn't divulging details about prev_events "
+                "referenced in this event."
+            ),
+        )
+
+        # Make sure the invalid event isn't there
+        extrem = self.get_success(self.store.get_latest_event_ids_in_room(self.room_id))
+        self.assertEqual(extrem, {self.remote_bad_user_join_event.event_id})
+
+
 class ServerACLsTestCase(unittest.TestCase):
     def test_blocked_server(self) -> None:
         e = _create_acl_event({"allow": ["*"], "deny": ["evil.com"]})
@@ -355,13 +519,76 @@ class SendJoinFederationTests(unittest.FederatingHomeserverTestCase):
     #   is probably sufficient to reassure that the bucket is updated.
 
 
-def _create_acl_event(content: JsonDict) -> EventBase:
-    return make_event_from_dict(
-        {
-            "room_id": "!a:b",
-            "event_id": "$a:b",
-            "type": "m.room.server_acls",
-            "sender": "@a:b",
-            "content": content,
+class StripUnsignedFromEventsTestCase(unittest.TestCase):
+    """
+    Test to make sure that we handle the raw JSON events from federation carefully and
+    strip anything that shouldn't be there.
+    """
+
+    def test_strip_unauthorized_unsigned_values(self) -> None:
+        event1 = {
+            "sender": "@baduser:test.serv",
+            "state_key": "@baduser:test.serv",
+            "event_id": "$event1:test.serv",
+            "depth": 1000,
+            "origin_server_ts": 1,
+            "type": "m.room.member",
+            "origin": "test.servx",
+            "content": {"membership": "join"},
+            "auth_events": [],
+            "unsigned": {"malicious garbage": "hackz", "more warez": "more hackz"},
         }
-    )
+        filtered_event = event_from_pdu_json(event1, RoomVersions.V1)
+        # Make sure unauthorized fields are stripped from unsigned
+        self.assertNotIn("more warez", filtered_event.unsigned)
+
+    def test_strip_event_maintains_allowed_fields(self) -> None:
+        event2 = {
+            "sender": "@baduser:test.serv",
+            "state_key": "@baduser:test.serv",
+            "event_id": "$event2:test.serv",
+            "depth": 1000,
+            "origin_server_ts": 1,
+            "type": "m.room.member",
+            "origin": "test.servx",
+            "auth_events": [],
+            "content": {"membership": "join"},
+            "unsigned": {
+                "malicious garbage": "hackz",
+                "more warez": "more hackz",
+                "age": 14,
+                "invite_room_state": [],
+            },
+        }
+
+        filtered_event2 = event_from_pdu_json(event2, RoomVersions.V1)
+        self.assertIn("age", filtered_event2.unsigned)
+        self.assertEqual(14, filtered_event2.unsigned["age"])
+        self.assertNotIn("more warez", filtered_event2.unsigned)
+        # Invite_room_state is allowed in events of type m.room.member
+        self.assertIn("invite_room_state", filtered_event2.unsigned)
+        self.assertEqual([], filtered_event2.unsigned["invite_room_state"])
+
+    def test_strip_event_removes_fields_based_on_event_type(self) -> None:
+        event3 = {
+            "sender": "@baduser:test.serv",
+            "state_key": "@baduser:test.serv",
+            "event_id": "$event3:test.serv",
+            "depth": 1000,
+            "origin_server_ts": 1,
+            "type": "m.room.power_levels",
+            "origin": "test.servx",
+            "content": {},
+            "auth_events": [],
+            "unsigned": {
+                "malicious garbage": "hackz",
+                "more warez": "more hackz",
+                "age": 14,
+                "invite_room_state": [],
+            },
+        }
+        filtered_event3 = event_from_pdu_json(event3, RoomVersions.V1)
+        self.assertIn("age", filtered_event3.unsigned)
+        # Invite_room_state field is only permitted in event type m.room.member
+        self.assertNotIn("invite_room_state", filtered_event3.unsigned)
+        self.assertNotIn("more warez", filtered_event3.unsigned)
diff --git a/tests/handlers/test_appservice.py b/tests/handlers/test_appservice.py
index 1eec0d43b7..1db630e9e4 100644
--- a/tests/handlers/test_appservice.py
+++ b/tests/handlers/test_appservice.py
@@ -1165,12 +1165,23 @@ class ApplicationServicesHandlerOtkCountsTestCase(unittest.HomeserverTestCase):
         self.hs.get_datastores().main.services_cache = [self._service]
 
         # Register some appservice users
-        self._sender_user, self._sender_device = self.register_appservice_user(
+        user_id, device_id = self.register_appservice_user(
             "as.sender", self._service_token
         )
-        self._namespaced_user, self._namespaced_device = self.register_appservice_user(
+        # With MSC4190 enabled, there will not be a device created
+        # during AS registration. However MSC4190 is not enabled
+        # in this test. It may become the default behaviour in the
+        # future, in which case this test will need to be updated.
+        assert device_id is not None
+        self._sender_user = user_id
+        self._sender_device = device_id
+
+        user_id, device_id = self.register_appservice_user(
             "_as_user1", self._service_token
         )
+        assert device_id is not None
+        self._namespaced_user = user_id
+        self._namespaced_device = device_id
 
         # Register a real user as well.
         self._real_user = self.register_user("real.user", "meow")
diff --git a/tests/handlers/test_directory.py b/tests/handlers/test_directory.py
index 4a3e36ffde..b7058d8002 100644
--- a/tests/handlers/test_directory.py
+++ b/tests/handlers/test_directory.py
@@ -587,6 +587,7 @@ class TestRoomListSearchDisabled(unittest.HomeserverTestCase):
         self.room_list_handler = hs.get_room_list_handler()
         self.directory_handler = hs.get_directory_handler()
 
+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
     def test_disabling_room_list(self) -> None:
         self.room_list_handler.enable_room_list_search = True
         self.directory_handler.enable_room_list_search = True
diff --git a/tests/handlers/test_federation_event.py b/tests/handlers/test_federation_event.py
index 5db10fa74c..51eca56c3b 100644
--- a/tests/handlers/test_federation_event.py
+++ b/tests/handlers/test_federation_event.py
@@ -375,7 +375,7 @@ class FederationEventHandlerTests(unittest.FederatingHomeserverTestCase):
 
         In this test, we pretend we are processing a "pulled" event via
         backfill. The pulled event succesfully processes and the backward
-        extremeties are updated along with clearing out any failed pull attempts
+        extremities are updated along with clearing out any failed pull attempts
         for those old extremities.
 
         We check that we correctly cleared failed pull attempts of the
@@ -807,6 +807,7 @@ class FederationEventHandlerTests(unittest.FederatingHomeserverTestCase):
 
         OTHER_USER = f"@user:{self.OTHER_SERVER_NAME}"
         main_store = self.hs.get_datastores().main
+        state_deletion_store = self.hs.get_datastores().state_deletion
 
         # Create the room.
         kermit_user_id = self.register_user("kermit", "test")
@@ -958,7 +959,9 @@ class FederationEventHandlerTests(unittest.FederatingHomeserverTestCase):
                         bert_member_event.event_id: bert_member_event,
                         rejected_kick_event.event_id: rejected_kick_event,
                     },
-                    state_res_store=StateResolutionStore(main_store),
+                    state_res_store=StateResolutionStore(
+                        main_store, state_deletion_store
+                    ),
                 )
             ),
             [bert_member_event.event_id, rejected_kick_event.event_id],
@@ -1003,7 +1006,9 @@ class FederationEventHandlerTests(unittest.FederatingHomeserverTestCase):
                         rejected_power_levels_event.event_id,
                     ],
                     event_map={},
-                    state_res_store=StateResolutionStore(main_store),
+                    state_res_store=StateResolutionStore(
+                        main_store, state_deletion_store
+                    ),
                     full_conflicted_set=set(),
                 )
             ),
diff --git a/tests/handlers/test_oauth_delegation.py b/tests/handlers/test_oauth_delegation.py
index 5b5dc713d1..5f8c25557a 100644
--- a/tests/handlers/test_oauth_delegation.py
+++ b/tests/handlers/test_oauth_delegation.py
@@ -43,6 +43,7 @@ from synapse.api.errors import (
     OAuthInsufficientScopeError,
     SynapseError,
 )
+from synapse.appservice import ApplicationService
 from synapse.http.site import SynapseRequest
 from synapse.rest import admin
 from synapse.rest.client import account, devices, keys, login, logout, register
@@ -379,6 +380,44 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
         )
         self.assertEqual(requester.device_id, DEVICE)
 
+    def test_active_user_with_device_explicit_device_id(self) -> None:
+        """The handler should return a requester with normal user rights and a device ID, given explicitly, as supported by MAS 0.15+"""
+
+        self.http_client.request = AsyncMock(
+            return_value=FakeResponse.json(
+                code=200,
+                payload={
+                    "active": True,
+                    "sub": SUBJECT,
+                    "scope": " ".join([MATRIX_USER_SCOPE]),
+                    "device_id": DEVICE,
+                    "username": USERNAME,
+                },
+            )
+        )
+        request = Mock(args={})
+        request.args[b"access_token"] = [b"mockAccessToken"]
+        request.requestHeaders.getRawHeaders = mock_getRawHeaders()
+        requester = self.get_success(self.auth.get_user_by_req(request))
+        self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
+        self.http_client.request.assert_called_once_with(
+            method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
+        )
+        # It should have called with the 'X-MAS-Supports-Device-Id: 1' header
+        self.assertEqual(
+            self.http_client.request.call_args[1]["headers"].getRawHeaders(
+                b"X-MAS-Supports-Device-Id",
+            ),
+            [b"1"],
+        )
+        self._assertParams()
+        self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
+        self.assertEqual(requester.is_guest, False)
+        self.assertEqual(
+            get_awaitable_result(self.auth.is_server_admin(requester)), False
+        )
+        self.assertEqual(requester.device_id, DEVICE)
+
     def test_multiple_devices(self) -> None:
         """The handler should raise an error if multiple devices are found in the scope."""
 
@@ -560,15 +599,31 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
         self.assertEqual(channel.code, 401, channel.json_body)
 
     def expect_unrecognized(
-        self, method: str, path: str, content: Union[bytes, str, JsonDict] = ""
+        self,
+        method: str,
+        path: str,
+        content: Union[bytes, str, JsonDict] = "",
+        auth: bool = False,
     ) -> None:
-        channel = self.make_request(method, path, content)
+        channel = self.make_request(
+            method, path, content, access_token="token" if auth else None
+        )
 
         self.assertEqual(channel.code, 404, channel.json_body)
         self.assertEqual(
             channel.json_body["errcode"], Codes.UNRECOGNIZED, channel.json_body
         )
 
+    def expect_forbidden(
+        self, method: str, path: str, content: Union[bytes, str, JsonDict] = ""
+    ) -> None:
+        channel = self.make_request(method, path, content)
+
+        self.assertEqual(channel.code, 403, channel.json_body)
+        self.assertEqual(
+            channel.json_body["errcode"], Codes.FORBIDDEN, channel.json_body
+        )
+
     def test_uia_endpoints(self) -> None:
         """Test that endpoints that were removed in MSC2964 are no longer available."""
 
@@ -623,11 +678,35 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
 
     def test_registration_endpoints_removed(self) -> None:
         """Test that registration endpoints that were removed in MSC2964 are no longer available."""
+        appservice = ApplicationService(
+            token="i_am_an_app_service",
+            id="1234",
+            namespaces={"users": [{"regex": r"@alice:.+", "exclusive": True}]},
+            sender="@as_main:test",
+        )
+
+        self.hs.get_datastores().main.services_cache = [appservice]
         self.expect_unrecognized(
             "GET", "/_matrix/client/v1/register/m.login.registration_token/validity"
         )
+
+        # Registration is disabled
+        self.expect_forbidden(
+            "POST",
+            "/_matrix/client/v3/register",
+            {"username": "alice", "password": "hunter2"},
+        )
+
         # This is still available for AS registrations
-        # self.expect_unrecognized("POST", "/_matrix/client/v3/register")
+        channel = self.make_request(
+            "POST",
+            "/_matrix/client/v3/register",
+            {"username": "alice", "type": "m.login.application_service"},
+            shorthand=False,
+            access_token="i_am_an_app_service",
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+
         self.expect_unrecognized("GET", "/_matrix/client/v3/register/available")
         self.expect_unrecognized(
             "POST", "/_matrix/client/v3/register/email/requestToken"
@@ -648,8 +727,25 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
 
     def test_device_management_endpoints_removed(self) -> None:
         """Test that device management endpoints that were removed in MSC2964 are no longer available."""
-        self.expect_unrecognized("POST", "/_matrix/client/v3/delete_devices")
-        self.expect_unrecognized("DELETE", "/_matrix/client/v3/devices/{DEVICE}")
+
+        # Because we still support those endpoints with ASes, it checks the
+        # access token before returning 404
+        self.http_client.request = AsyncMock(
+            return_value=FakeResponse.json(
+                code=200,
+                payload={
+                    "active": True,
+                    "sub": SUBJECT,
+                    "scope": " ".join([MATRIX_USER_SCOPE, MATRIX_DEVICE_SCOPE]),
+                    "username": USERNAME,
+                },
+            )
+        )
+
+        self.expect_unrecognized("POST", "/_matrix/client/v3/delete_devices", auth=True)
+        self.expect_unrecognized(
+            "DELETE", "/_matrix/client/v3/devices/{DEVICE}", auth=True
+        )
 
     def test_openid_endpoints_removed(self) -> None:
         """Test that OpenID id_token endpoints that were removed in MSC2964 are no longer available."""
@@ -772,7 +868,7 @@ class MSC3861OAuthDelegation(HomeserverTestCase):
         req = SynapseRequest(channel, self.site)  # type: ignore[arg-type]
         req.client.host = MAS_IPV4_ADDR
         req.requestHeaders.addRawHeader(
-            "Authorization", f"Bearer {self.auth._admin_token}"
+            "Authorization", f"Bearer {self.auth._admin_token()}"
         )
         req.requestHeaders.addRawHeader("User-Agent", MAS_USER_AGENT)
         req.content = BytesIO(b"")
diff --git a/tests/handlers/test_oidc.py b/tests/handlers/test_oidc.py
index a81501979d..cfd9969563 100644
--- a/tests/handlers/test_oidc.py
+++ b/tests/handlers/test_oidc.py
@@ -57,6 +57,7 @@ CLIENT_ID = "test-client-id"
 CLIENT_SECRET = "test-client-secret"
 BASE_URL = "https://synapse/"
 CALLBACK_URL = BASE_URL + "_synapse/client/oidc/callback"
+TEST_REDIRECT_URI = "https://test/oidc/callback"
 SCOPES = ["openid"]
 
 # config for common cases
@@ -70,12 +71,16 @@ DEFAULT_CONFIG = {
 }
 
 # extends the default config with explicit OAuth2 endpoints instead of using discovery
+#
+# We add "explicit" to things to make them different from the discovered values to make
+# sure that the explicit values override the discovered ones.
 EXPLICIT_ENDPOINT_CONFIG = {
     **DEFAULT_CONFIG,
     "discover": False,
-    "authorization_endpoint": ISSUER + "authorize",
-    "token_endpoint": ISSUER + "token",
-    "jwks_uri": ISSUER + "jwks",
+    "authorization_endpoint": ISSUER + "authorize-explicit",
+    "token_endpoint": ISSUER + "token-explicit",
+    "jwks_uri": ISSUER + "jwks-explicit",
+    "id_token_signing_alg_values_supported": ["RS256", "<explicit>"],
 }
 
 
@@ -259,12 +264,64 @@ class OidcHandlerTestCase(HomeserverTestCase):
         self.get_success(self.provider.load_metadata())
         self.fake_server.get_metadata_handler.assert_not_called()
 
+    @override_config({"oidc_config": {**EXPLICIT_ENDPOINT_CONFIG, "discover": True}})
+    def test_discovery_with_explicit_config(self) -> None:
+        """
+        The handler should discover the endpoints from OIDC discovery document but
+        values are overriden by the explicit config.
+        """
+        # This would throw if some metadata were invalid
+        metadata = self.get_success(self.provider.load_metadata())
+        self.fake_server.get_metadata_handler.assert_called_once()
+
+        self.assertEqual(metadata.issuer, self.fake_server.issuer)
+        # It seems like authlib does not have that defined in its metadata models
+        self.assertEqual(
+            metadata.get("userinfo_endpoint"),
+            self.fake_server.userinfo_endpoint,
+        )
+
+        # Ensure the values are overridden correctly since these were configured
+        # explicitly
+        self.assertEqual(
+            metadata.authorization_endpoint,
+            EXPLICIT_ENDPOINT_CONFIG["authorization_endpoint"],
+        )
+        self.assertEqual(
+            metadata.token_endpoint, EXPLICIT_ENDPOINT_CONFIG["token_endpoint"]
+        )
+        self.assertEqual(metadata.jwks_uri, EXPLICIT_ENDPOINT_CONFIG["jwks_uri"])
+        self.assertEqual(
+            metadata.id_token_signing_alg_values_supported,
+            EXPLICIT_ENDPOINT_CONFIG["id_token_signing_alg_values_supported"],
+        )
+
+        # subsequent calls should be cached
+        self.reset_mocks()
+        self.get_success(self.provider.load_metadata())
+        self.fake_server.get_metadata_handler.assert_not_called()
+
     @override_config({"oidc_config": EXPLICIT_ENDPOINT_CONFIG})
     def test_no_discovery(self) -> None:
         """When discovery is disabled, it should not try to load from discovery document."""
-        self.get_success(self.provider.load_metadata())
+        metadata = self.get_success(self.provider.load_metadata())
         self.fake_server.get_metadata_handler.assert_not_called()
 
+        # Ensure the values are overridden correctly since these were configured
+        # explicitly
+        self.assertEqual(
+            metadata.authorization_endpoint,
+            EXPLICIT_ENDPOINT_CONFIG["authorization_endpoint"],
+        )
+        self.assertEqual(
+            metadata.token_endpoint, EXPLICIT_ENDPOINT_CONFIG["token_endpoint"]
+        )
+        self.assertEqual(metadata.jwks_uri, EXPLICIT_ENDPOINT_CONFIG["jwks_uri"])
+        self.assertEqual(
+            metadata.id_token_signing_alg_values_supported,
+            EXPLICIT_ENDPOINT_CONFIG["id_token_signing_alg_values_supported"],
+        )
+
     @override_config({"oidc_config": DEFAULT_CONFIG})
     def test_load_jwks(self) -> None:
         """JWKS loading is done once (then cached) if used."""
@@ -530,6 +587,24 @@ class OidcHandlerTestCase(HomeserverTestCase):
         code_verifier = get_value_from_macaroon(macaroon, "code_verifier")
         self.assertEqual(code_verifier, "")
 
+    @override_config(
+        {"oidc_config": {**DEFAULT_CONFIG, "redirect_uri": TEST_REDIRECT_URI}}
+    )
+    def test_redirect_request_with_overridden_redirect_uri(self) -> None:
+        """The authorization endpoint redirect has the overridden `redirect_uri` value."""
+        req = Mock(spec=["cookies"])
+        req.cookies = []
+
+        url = urlparse(
+            self.get_success(
+                self.provider.handle_redirect_request(req, b"http://client/redirect")
+            )
+        )
+
+        # Ensure that the redirect_uri in the returned url has been overridden.
+        params = parse_qs(url.query)
+        self.assertEqual(params["redirect_uri"], [TEST_REDIRECT_URI])
+
     @override_config({"oidc_config": DEFAULT_CONFIG})
     def test_callback_error(self) -> None:
         """Errors from the provider returned in the callback are displayed."""
@@ -897,6 +972,37 @@ class OidcHandlerTestCase(HomeserverTestCase):
         self.assertEqual(args["client_id"], [CLIENT_ID])
         self.assertEqual(args["redirect_uri"], [CALLBACK_URL])
 
+    @override_config(
+        {
+            "oidc_config": {
+                **DEFAULT_CONFIG,
+                "redirect_uri": TEST_REDIRECT_URI,
+            }
+        }
+    )
+    def test_code_exchange_with_overridden_redirect_uri(self) -> None:
+        """Code exchange behaves correctly and handles various error scenarios."""
+        # Set up a fake IdP with a token endpoint handler.
+        token = {
+            "type": "Bearer",
+            "access_token": "aabbcc",
+        }
+
+        self.fake_server.post_token_handler.side_effect = None
+        self.fake_server.post_token_handler.return_value = FakeResponse.json(
+            payload=token
+        )
+        code = "code"
+
+        # Exchange the code against the fake IdP.
+        self.get_success(self.provider._exchange_code(code, code_verifier=""))
+
+        # Check that the `redirect_uri` parameter provided matches our
+        # overridden config value.
+        kwargs = self.fake_server.request.call_args[1]
+        args = parse_qs(kwargs["data"].decode("utf-8"))
+        self.assertEqual(args["redirect_uri"], [TEST_REDIRECT_URI])
+
     @override_config(
         {
             "oidc_config": {
@@ -1267,6 +1373,38 @@ class OidcHandlerTestCase(HomeserverTestCase):
             auth_provider_session_id=None,
         )
 
+    @override_config(
+        {
+            "oidc_config": {
+                **DEFAULT_CONFIG,
+                "attribute_requirements": [
+                    {"attribute": "test", "one_of": ["foo", "bar"]}
+                ],
+            }
+        }
+    )
+    def test_attribute_requirements_one_of(self) -> None:
+        """Test that auth succeeds if userinfo attribute has multiple values and CONTAINS required value"""
+        # userinfo with "test": ["bar"] attribute should succeed.
+        userinfo = {
+            "sub": "tester",
+            "username": "tester",
+            "test": ["bar"],
+        }
+        request, _ = self.start_authorization(userinfo)
+        self.get_success(self.handler.handle_oidc_callback(request))
+
+        # check that the auth handler got called as expected
+        self.complete_sso_login.assert_called_once_with(
+            "@tester:test",
+            self.provider.idp_id,
+            request,
+            ANY,
+            None,
+            new_user=True,
+            auth_provider_session_id=None,
+        )
+
     @override_config(
         {
             "oidc_config": {
diff --git a/tests/handlers/test_presence.py b/tests/handlers/test_presence.py
index 598d6c13cd..6b7bf112c2 100644
--- a/tests/handlers/test_presence.py
+++ b/tests/handlers/test_presence.py
@@ -23,14 +23,21 @@ from typing import Optional, cast
 from unittest.mock import Mock, call
 
 from parameterized import parameterized
-from signedjson.key import generate_signing_key
+from signedjson.key import (
+    encode_verify_key_base64,
+    generate_signing_key,
+    get_verify_key,
+)
 
 from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.constants import EventTypes, Membership, PresenceState
 from synapse.api.presence import UserDevicePresenceState, UserPresenceState
-from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
-from synapse.events.builder import EventBuilder
+from synapse.api.room_versions import (
+    RoomVersion,
+)
+from synapse.crypto.event_signing import add_hashes_and_signatures
+from synapse.events import EventBase, make_event_from_dict
 from synapse.federation.sender import FederationSender
 from synapse.handlers.presence import (
     BUSY_ONLINE_TIMEOUT,
@@ -45,18 +52,24 @@ from synapse.handlers.presence import (
     handle_update,
 )
 from synapse.rest import admin
-from synapse.rest.client import room
+from synapse.rest.client import login, room, sync
 from synapse.server import HomeServer
 from synapse.storage.database import LoggingDatabaseConnection
+from synapse.storage.keys import FetchKeyResult
 from synapse.types import JsonDict, UserID, get_domain_from_id
 from synapse.util import Clock
 
 from tests import unittest
 from tests.replication._base import BaseMultiWorkerStreamTestCase
+from tests.unittest import override_config
 
 
 class PresenceUpdateTestCase(unittest.HomeserverTestCase):
-    servlets = [admin.register_servlets]
+    servlets = [
+        admin.register_servlets,
+        login.register_servlets,
+        sync.register_servlets,
+    ]
 
     def prepare(
         self, reactor: MemoryReactor, clock: Clock, homeserver: HomeServer
@@ -425,6 +438,102 @@ class PresenceUpdateTestCase(unittest.HomeserverTestCase):
 
         wheel_timer.insert.assert_not_called()
 
+    # `rc_presence` is set very high during unit tests to avoid ratelimiting
+    # subtly impacting unrelated tests. We set the ratelimiting back to a
+    # reasonable value for the tests specific to presence ratelimiting.
+    @override_config(
+        {"rc_presence": {"per_user": {"per_second": 0.1, "burst_count": 1}}}
+    )
+    def test_over_ratelimit_offline_to_online_to_unavailable(self) -> None:
+        """
+        Send a presence update, check that it went through, immediately send another one and
+        check that it was ignored.
+        """
+        self._test_ratelimit_offline_to_online_to_unavailable(ratelimited=True)
+
+    @override_config(
+        {"rc_presence": {"per_user": {"per_second": 0.1, "burst_count": 1}}}
+    )
+    def test_within_ratelimit_offline_to_online_to_unavailable(self) -> None:
+        """
+        Send a presence update, check that it went through, advancing time a sufficient amount,
+        send another presence update and check that it also worked.
+        """
+        self._test_ratelimit_offline_to_online_to_unavailable(ratelimited=False)
+
+    @override_config(
+        {"rc_presence": {"per_user": {"per_second": 0.1, "burst_count": 1}}}
+    )
+    def _test_ratelimit_offline_to_online_to_unavailable(
+        self, ratelimited: bool
+    ) -> None:
+        """Test rate limit for presence updates sent with sync requests.
+
+        Args:
+            ratelimited: Test rate limited case.
+        """
+        wheel_timer = Mock()
+        user_id = "@user:pass"
+        now = 5000000
+        sync_url = "/sync?access_token=%s&set_presence=%s"
+
+        # Register the user who syncs presence
+        user_id = self.register_user("user", "pass")
+        access_token = self.login("user", "pass")
+
+        # Get the handler (which kicks off a bunch of timers).
+        presence_handler = self.hs.get_presence_handler()
+
+        # Ensure the user is initially offline.
+        prev_state = UserPresenceState.default(user_id)
+        new_state = prev_state.copy_and_replace(
+            state=PresenceState.OFFLINE, last_active_ts=now
+        )
+
+        state, persist_and_notify, federation_ping = handle_update(
+            prev_state,
+            new_state,
+            is_mine=True,
+            wheel_timer=wheel_timer,
+            now=now,
+            persist=False,
+        )
+
+        # Check that the user is offline.
+        state = self.get_success(
+            presence_handler.get_state(UserID.from_string(user_id))
+        )
+        self.assertEqual(state.state, PresenceState.OFFLINE)
+
+        # Send sync request with set_presence=online.
+        channel = self.make_request("GET", sync_url % (access_token, "online"))
+        self.assertEqual(200, channel.code)
+
+        # Assert the user is now online.
+        state = self.get_success(
+            presence_handler.get_state(UserID.from_string(user_id))
+        )
+        self.assertEqual(state.state, PresenceState.ONLINE)
+
+        if not ratelimited:
+            # Advance time a sufficient amount to avoid rate limiting.
+            self.reactor.advance(30)
+
+        # Send another sync request with set_presence=unavailable.
+        channel = self.make_request("GET", sync_url % (access_token, "unavailable"))
+        self.assertEqual(200, channel.code)
+
+        state = self.get_success(
+            presence_handler.get_state(UserID.from_string(user_id))
+        )
+
+        if ratelimited:
+            # Assert the user is still online and presence update was ignored.
+            self.assertEqual(state.state, PresenceState.ONLINE)
+        else:
+            # Assert the user is now unavailable.
+            self.assertEqual(state.state, PresenceState.UNAVAILABLE)
+
 
 class PresenceTimeoutTestCase(unittest.TestCase):
     """Tests different timers and that the timer does not change `status_msg` of user."""
@@ -1825,6 +1934,7 @@ class PresenceJoinTestCase(unittest.HomeserverTestCase):
         # self.event_builder_for_2.hostname = "test2"
 
         self.store = hs.get_datastores().main
+        self.storage_controllers = hs.get_storage_controllers()
         self.state = hs.get_state_handler()
         self._event_auth_handler = hs.get_event_auth_handler()
 
@@ -1940,29 +2050,35 @@ class PresenceJoinTestCase(unittest.HomeserverTestCase):
 
         hostname = get_domain_from_id(user_id)
 
-        room_version = self.get_success(self.store.get_room_version_id(room_id))
+        room_version = self.get_success(self.store.get_room_version(room_id))
 
-        builder = EventBuilder(
-            state=self.state,
-            event_auth_handler=self._event_auth_handler,
-            store=self.store,
-            clock=self.clock,
-            hostname=hostname,
-            signing_key=self.random_signing_key,
-            room_version=KNOWN_ROOM_VERSIONS[room_version],
-            room_id=room_id,
-            type=EventTypes.Member,
-            sender=user_id,
-            state_key=user_id,
-            content={"membership": Membership.JOIN},
+        state_map = self.get_success(
+            self.storage_controllers.state.get_current_state(room_id)
         )
 
-        prev_event_ids = self.get_success(
-            self.store.get_latest_event_ids_in_room(room_id)
+        # Figure out what the forward extremities in the room are (the most recent
+        # events that aren't tied into the DAG)
+        forward_extremity_event_ids = self.get_success(
+            self.hs.get_datastores().main.get_latest_event_ids_in_room(room_id)
         )
 
-        event = self.get_success(
-            builder.build(prev_event_ids=list(prev_event_ids), auth_event_ids=None)
+        event = self.create_fake_event_from_remote_server(
+            remote_server_name=hostname,
+            event_dict={
+                "room_id": room_id,
+                "sender": user_id,
+                "type": EventTypes.Member,
+                "state_key": user_id,
+                "depth": 1000,
+                "origin_server_ts": 1,
+                "content": {"membership": Membership.JOIN},
+                "auth_events": [
+                    state_map[(EventTypes.Create, "")].event_id,
+                    state_map[(EventTypes.JoinRules, "")].event_id,
+                ],
+                "prev_events": list(forward_extremity_event_ids),
+            },
+            room_version=room_version,
         )
 
         self.get_success(self.federation_event_handler.on_receive_pdu(hostname, event))
@@ -1970,3 +2086,50 @@ class PresenceJoinTestCase(unittest.HomeserverTestCase):
         # Check that it was successfully persisted.
         self.get_success(self.store.get_event(event.event_id))
         self.get_success(self.store.get_event(event.event_id))
+
+    def create_fake_event_from_remote_server(
+        self, remote_server_name: str, event_dict: JsonDict, room_version: RoomVersion
+    ) -> EventBase:
+        """
+        This is similar to what `FederatingHomeserverTestCase` is doing but we don't
+        need all of the extra baggage and we want to be able to create an event from
+        many remote servers.
+        """
+
+        # poke the other server's signing key into the key store, so that we don't
+        # make requests for it
+        other_server_signature_key = generate_signing_key("test")
+        verify_key = get_verify_key(other_server_signature_key)
+        verify_key_id = "%s:%s" % (verify_key.alg, verify_key.version)
+
+        self.get_success(
+            self.hs.get_datastores().main.store_server_keys_response(
+                remote_server_name,
+                from_server=remote_server_name,
+                ts_added_ms=self.clock.time_msec(),
+                verify_keys={
+                    verify_key_id: FetchKeyResult(
+                        verify_key=verify_key,
+                        valid_until_ts=self.clock.time_msec() + 10000,
+                    ),
+                },
+                response_json={
+                    "verify_keys": {
+                        verify_key_id: {"key": encode_verify_key_base64(verify_key)}
+                    }
+                },
+            )
+        )
+
+        add_hashes_and_signatures(
+            room_version=room_version,
+            event_dict=event_dict,
+            signature_name=remote_server_name,
+            signing_key=other_server_signature_key,
+        )
+        event = make_event_from_dict(
+            event_dict,
+            room_version=room_version,
+        )
+
+        return event
diff --git a/tests/handlers/test_room_list.py b/tests/handlers/test_room_list.py
index 4d22ef98c2..45cef09b22 100644
--- a/tests/handlers/test_room_list.py
+++ b/tests/handlers/test_room_list.py
@@ -6,6 +6,7 @@ from synapse.rest.client import directory, login, room
 from synapse.types import JsonDict
 
 from tests import unittest
+from tests.utils import default_config
 
 
 class RoomListHandlerTestCase(unittest.HomeserverTestCase):
@@ -30,6 +31,11 @@ class RoomListHandlerTestCase(unittest.HomeserverTestCase):
         assert channel.code == HTTPStatus.OK, f"couldn't publish room: {channel.result}"
         return room_id
 
+    def default_config(self) -> JsonDict:
+        config = default_config("test")
+        config["room_list_publication_rules"] = [{"action": "allow"}]
+        return config
+
     def test_acls_applied_to_room_directory_results(self) -> None:
         """
         Creates 3 rooms. Room 2 has an ACL that only permits the homeservers
diff --git a/tests/handlers/test_saml.py b/tests/handlers/test_saml.py
index 6ab8fda6e7..1aca354826 100644
--- a/tests/handlers/test_saml.py
+++ b/tests/handlers/test_saml.py
@@ -363,6 +363,52 @@ class SamlHandlerTestCase(HomeserverTestCase):
             auth_provider_session_id=None,
         )
 
+    @override_config(
+        {
+            "saml2_config": {
+                "attribute_requirements": [
+                    {"attribute": "userGroup", "one_of": ["staff", "admin"]},
+                ],
+            },
+        }
+    )
+    def test_attribute_requirements_one_of(self) -> None:
+        """The required attributes can be comma-separated."""
+
+        # stub out the auth handler
+        auth_handler = self.hs.get_auth_handler()
+        auth_handler.complete_sso_login = AsyncMock()  # type: ignore[method-assign]
+
+        # The response doesn't have the proper department.
+        saml_response = FakeAuthnResponse(
+            {"uid": "test_user", "username": "test_user", "userGroup": ["nogroup"]}
+        )
+        request = _mock_request()
+        self.get_success(
+            self.handler._handle_authn_response(request, saml_response, "redirect_uri")
+        )
+        auth_handler.complete_sso_login.assert_not_called()
+
+        # Add the proper attributes and it should succeed.
+        saml_response = FakeAuthnResponse(
+            {"uid": "test_user", "username": "test_user", "userGroup": ["admin"]}
+        )
+        request.reset_mock()
+        self.get_success(
+            self.handler._handle_authn_response(request, saml_response, "redirect_uri")
+        )
+
+        # check that the auth handler got called as expected
+        auth_handler.complete_sso_login.assert_called_once_with(
+            "@test_user:test",
+            "saml",
+            request,
+            "redirect_uri",
+            None,
+            new_user=True,
+            auth_provider_session_id=None,
+        )
+
 
 def _mock_request() -> Mock:
     """Returns a mock which will stand in as a SynapseRequest"""
diff --git a/tests/handlers/test_send_email.py b/tests/handlers/test_send_email.py
index cedcea27d9..5f7839c82c 100644
--- a/tests/handlers/test_send_email.py
+++ b/tests/handlers/test_send_email.py
@@ -163,6 +163,7 @@ class SendEmailHandlerTestCaseIPv4(HomeserverTestCase):
             "email": {
                 "notif_from": "noreply@test",
                 "force_tls": True,
+                "tlsname": "example.org",
             },
         }
     )
@@ -186,10 +187,9 @@ class SendEmailHandlerTestCaseIPv4(HomeserverTestCase):
         self.assertEqual(host, self.reactor.lookups["localhost"])
         self.assertEqual(port, 465)
         # We need to make sure that TLS is happenning
-        self.assertIsInstance(
-            client_factory._wrappedFactory._testingContextFactory,
-            ClientTLSOptions,
-        )
+        context_factory = client_factory._wrappedFactory._testingContextFactory
+        self.assertIsInstance(context_factory, ClientTLSOptions)
+        self.assertEqual(context_factory._hostname, "example.org")  # tlsname
         # And since we use endpoints, they go through reactor.connectTCP
         # which works differently to connectSSL on the testing reactor
 
diff --git a/tests/handlers/test_sync.py b/tests/handlers/test_sync.py
index 9dd0e98971..6b202dfbd5 100644
--- a/tests/handlers/test_sync.py
+++ b/tests/handlers/test_sync.py
@@ -17,6 +17,7 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
+from http import HTTPStatus
 from typing import Collection, ContextManager, List, Optional
 from unittest.mock import AsyncMock, Mock, patch
 
@@ -347,7 +348,15 @@ class SyncTestCase(tests.unittest.HomeserverTestCase):
         # the prev_events used when creating the join event, such that the ban does not
         # precede the join.
         with self._patch_get_latest_events([last_room_creation_event_id]):
-            self.helper.join(room_id, eve, tok=eve_token)
+            self.helper.join(
+                room_id,
+                eve,
+                tok=eve_token,
+                # Previously, this join would succeed but now we expect it to fail at
+                # this point. The rest of the test is for the case when this used to
+                # succeed.
+                expect_code=HTTPStatus.FORBIDDEN,
+            )
 
         # Eve makes a second, incremental sync.
         eve_incremental_sync_after_join: SyncResult = self.get_success(
diff --git a/tests/handlers/test_user_directory.py b/tests/handlers/test_user_directory.py
index 878d9683b6..a75095a79f 100644
--- a/tests/handlers/test_user_directory.py
+++ b/tests/handlers/test_user_directory.py
@@ -796,6 +796,7 @@ class UserDirectoryTestCase(unittest.HomeserverTestCase):
         s = self.get_success(self.handler.search_users(u1, "user2", 10))
         self.assertEqual(len(s["results"]), 1)
 
+        # Kept old spam checker without `requester_id` tests for backwards compatibility.
         async def allow_all(user_profile: UserProfile) -> bool:
             # Allow all users.
             return False
@@ -809,6 +810,7 @@ class UserDirectoryTestCase(unittest.HomeserverTestCase):
         s = self.get_success(self.handler.search_users(u1, "user2", 10))
         self.assertEqual(len(s["results"]), 1)
 
+        # Kept old spam checker without `requester_id` tests for backwards compatibility.
         # Configure a spam checker that filters all users.
         async def block_all(user_profile: UserProfile) -> bool:
             # All users are spammy.
@@ -820,6 +822,40 @@ class UserDirectoryTestCase(unittest.HomeserverTestCase):
         s = self.get_success(self.handler.search_users(u1, "user2", 10))
         self.assertEqual(len(s["results"]), 0)
 
+        async def allow_all_expects_requester_id(
+            user_profile: UserProfile, requester_id: str
+        ) -> bool:
+            self.assertEqual(requester_id, u1)
+            # Allow all users.
+            return False
+
+        # Configure a spam checker that does not filter any users.
+        spam_checker = self.hs.get_module_api_callbacks().spam_checker
+        spam_checker._check_username_for_spam_callbacks = [
+            allow_all_expects_requester_id
+        ]
+
+        # The results do not change:
+        # We get one search result when searching for user2 by user1.
+        s = self.get_success(self.handler.search_users(u1, "user2", 10))
+        self.assertEqual(len(s["results"]), 1)
+
+        # Configure a spam checker that filters all users.
+        async def block_all_expects_requester_id(
+            user_profile: UserProfile, requester_id: str
+        ) -> bool:
+            self.assertEqual(requester_id, u1)
+            # All users are spammy.
+            return True
+
+        spam_checker._check_username_for_spam_callbacks = [
+            block_all_expects_requester_id
+        ]
+
+        # User1 now gets no search results for any of the other users.
+        s = self.get_success(self.handler.search_users(u1, "user2", 10))
+        self.assertEqual(len(s["results"]), 0)
+
     @override_config(
         {
             "spam_checker": {
diff --git a/tests/http/test_proxyagent.py b/tests/http/test_proxyagent.py
index f71e4c2b8f..80b0856a56 100644
--- a/tests/http/test_proxyagent.py
+++ b/tests/http/test_proxyagent.py
@@ -854,7 +854,7 @@ class MatrixFederationAgentTests(TestCase):
     def test_proxy_with_no_scheme(self) -> None:
         http_proxy_agent = ProxyAgent(self.reactor, use_proxy=True)
         proxy_ep = checked_cast(HostnameEndpoint, http_proxy_agent.http_proxy_endpoint)
-        self.assertEqual(proxy_ep._hostStr, "proxy.com")
+        self.assertEqual(proxy_ep._hostText, "proxy.com")
         self.assertEqual(proxy_ep._port, 8888)
 
     @patch.dict(os.environ, {"http_proxy": "socks://proxy.com:8888"})
@@ -866,14 +866,14 @@ class MatrixFederationAgentTests(TestCase):
     def test_proxy_with_http_scheme(self) -> None:
         http_proxy_agent = ProxyAgent(self.reactor, use_proxy=True)
         proxy_ep = checked_cast(HostnameEndpoint, http_proxy_agent.http_proxy_endpoint)
-        self.assertEqual(proxy_ep._hostStr, "proxy.com")
+        self.assertEqual(proxy_ep._hostText, "proxy.com")
         self.assertEqual(proxy_ep._port, 8888)
 
     @patch.dict(os.environ, {"http_proxy": "https://proxy.com:8888"})
     def test_proxy_with_https_scheme(self) -> None:
         https_proxy_agent = ProxyAgent(self.reactor, use_proxy=True)
         proxy_ep = checked_cast(_WrapperEndpoint, https_proxy_agent.http_proxy_endpoint)
-        self.assertEqual(proxy_ep._wrappedEndpoint._hostStr, "proxy.com")
+        self.assertEqual(proxy_ep._wrappedEndpoint._hostText, "proxy.com")
         self.assertEqual(proxy_ep._wrappedEndpoint._port, 8888)
 
 
diff --git a/tests/media/test_media_storage.py b/tests/media/test_media_storage.py
index f4fbc0544a..c2e0e592d7 100644
--- a/tests/media/test_media_storage.py
+++ b/tests/media/test_media_storage.py
@@ -23,14 +23,13 @@ import shutil
 import tempfile
 from binascii import unhexlify
 from io import BytesIO
-from typing import Any, BinaryIO, ClassVar, Dict, List, Optional, Tuple, Union
+from typing import Any, BinaryIO, ClassVar, Dict, List, Literal, Optional, Tuple, Union
 from unittest.mock import MagicMock, Mock, patch
 from urllib import parse
 
 import attr
 from parameterized import parameterized, parameterized_class
 from PIL import Image as Image
-from typing_extensions import Literal
 
 from twisted.internet import defer
 from twisted.internet.defer import Deferred
diff --git a/tests/metrics/test_metrics.py b/tests/metrics/test_metrics.py
index 80f24814e8..2e7004df3a 100644
--- a/tests/metrics/test_metrics.py
+++ b/tests/metrics/test_metrics.py
@@ -19,12 +19,11 @@
 #
 #
 from importlib import metadata
-from typing import Dict, Tuple
+from typing import Dict, Protocol, Tuple
 from unittest.mock import patch
 
 from pkg_resources import parse_version
 from prometheus_client.core import Sample
-from typing_extensions import Protocol
 
 from synapse.app._base import _set_prometheus_client_use_created_metrics
 from synapse.metrics import REGISTRY, InFlightGauge, generate_latest
diff --git a/tests/push/test_http.py b/tests/push/test_http.py
index bcca472617..5c235bbe53 100644
--- a/tests/push/test_http.py
+++ b/tests/push/test_http.py
@@ -17,9 +17,11 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
-from typing import Any, List, Tuple
+from typing import Any, Dict, List, Tuple
 from unittest.mock import Mock
 
+from parameterized import parameterized
+
 from twisted.internet.defer import Deferred
 from twisted.test.proto_helpers import MemoryReactor
 
@@ -1085,3 +1087,83 @@ class HTTPPusherTests(HomeserverTestCase):
             self.pump()
 
         self.assertEqual(len(self.push_attempts), 11)
+
+    @parameterized.expand(
+        [
+            # Badge count disabled
+            (True, True),
+            (True, False),
+            # Badge count enabled
+            (False, True),
+            (False, False),
+        ]
+    )
+    @override_config({"experimental_features": {"msc4076_enabled": True}})
+    def test_msc4076_badge_count(
+        self, disable_badge_count: bool, event_id_only: bool
+    ) -> None:
+        # Register the user who gets notified
+        user_id = self.register_user("user", "pass")
+        access_token = self.login("user", "pass")
+
+        # Register the user who sends the message
+        other_user_id = self.register_user("otheruser", "pass")
+        other_access_token = self.login("otheruser", "pass")
+
+        # Register the pusher with disable_badge_count set to True
+        user_tuple = self.get_success(
+            self.hs.get_datastores().main.get_user_by_access_token(access_token)
+        )
+        assert user_tuple is not None
+        device_id = user_tuple.device_id
+
+        # Set the push data dict based on test input parameters
+        push_data: Dict[str, Any] = {
+            "url": "http://example.com/_matrix/push/v1/notify",
+        }
+        if disable_badge_count:
+            push_data["org.matrix.msc4076.disable_badge_count"] = True
+        if event_id_only:
+            push_data["format"] = "event_id_only"
+
+        self.get_success(
+            self.hs.get_pusherpool().add_or_update_pusher(
+                user_id=user_id,
+                device_id=device_id,
+                kind="http",
+                app_id="m.http",
+                app_display_name="HTTP Push Notifications",
+                device_display_name="pushy push",
+                pushkey="a@example.com",
+                lang=None,
+                data=push_data,
+            )
+        )
+
+        # Create a room
+        room = self.helper.create_room_as(user_id, tok=access_token)
+
+        # The other user joins
+        self.helper.join(room=room, user=other_user_id, tok=other_access_token)
+
+        # The other user sends a message
+        self.helper.send(room, body="Hi!", tok=other_access_token)
+
+        # Advance time a bit, so the pusher will register something has happened
+        self.pump()
+
+        # One push was attempted to be sent
+        self.assertEqual(len(self.push_attempts), 1)
+        self.assertEqual(
+            self.push_attempts[0][1], "http://example.com/_matrix/push/v1/notify"
+        )
+
+        if disable_badge_count:
+            # Verify that the notification DOESN'T contain a counts field
+            self.assertNotIn("counts", self.push_attempts[0][2]["notification"])
+        else:
+            # Ensure that the notification DOES contain a counts field
+            self.assertIn("counts", self.push_attempts[0][2]["notification"])
+            self.assertEqual(
+                self.push_attempts[0][2]["notification"]["counts"]["unread"], 1
+            )
diff --git a/tests/replication/http/test__base.py b/tests/replication/http/test__base.py
index 2eaad3707a..31d3163c01 100644
--- a/tests/replication/http/test__base.py
+++ b/tests/replication/http/test__base.py
@@ -46,7 +46,7 @@ class CancellableReplicationEndpoint(ReplicationEndpoint):
         self.clock = hs.get_clock()
 
     @staticmethod
-    async def _serialize_payload() -> JsonDict:
+    async def _serialize_payload(**kwargs: ReplicationEndpoint) -> JsonDict:
         return {}
 
     @cancellable
@@ -68,7 +68,7 @@ class UncancellableReplicationEndpoint(ReplicationEndpoint):
         self.clock = hs.get_clock()
 
     @staticmethod
-    async def _serialize_payload() -> JsonDict:
+    async def _serialize_payload(**kwargs: ReplicationEndpoint) -> JsonDict:
         return {}
 
     async def _handle_request(  # type: ignore[override]
diff --git a/tests/replication/test_federation_sender_shard.py b/tests/replication/test_federation_sender_shard.py
index 4429d0f4e2..58a7a9dc72 100644
--- a/tests/replication/test_federation_sender_shard.py
+++ b/tests/replication/test_federation_sender_shard.py
@@ -22,14 +22,26 @@ import logging
 from unittest.mock import AsyncMock, Mock
 
 from netaddr import IPSet
+from signedjson.key import (
+    encode_verify_key_base64,
+    generate_signing_key,
+    get_verify_key,
+)
+
+from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.constants import EventTypes, Membership
-from synapse.events.builder import EventBuilderFactory
+from synapse.api.room_versions import RoomVersion
+from synapse.crypto.event_signing import add_hashes_and_signatures
+from synapse.events import EventBase, make_event_from_dict
 from synapse.handlers.typing import TypingWriterHandler
 from synapse.http.federation.matrix_federation_agent import MatrixFederationAgent
 from synapse.rest.admin import register_servlets_for_client_rest_resource
 from synapse.rest.client import login, room
-from synapse.types import UserID, create_requester
+from synapse.server import HomeServer
+from synapse.storage.keys import FetchKeyResult
+from synapse.types import JsonDict, UserID, create_requester
+from synapse.util import Clock
 
 from tests.replication._base import BaseMultiWorkerStreamTestCase
 from tests.server import get_clock
@@ -63,6 +75,9 @@ class FederationSenderTestCase(BaseMultiWorkerStreamTestCase):
             ip_blocklist=IPSet(),
         )
 
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.storage_controllers = hs.get_storage_controllers()
+
     def test_send_event_single_sender(self) -> None:
         """Test that using a single federation sender worker correctly sends a
         new event.
@@ -243,35 +258,92 @@ class FederationSenderTestCase(BaseMultiWorkerStreamTestCase):
         self.assertTrue(sent_on_1)
         self.assertTrue(sent_on_2)
 
+    def create_fake_event_from_remote_server(
+        self, remote_server_name: str, event_dict: JsonDict, room_version: RoomVersion
+    ) -> EventBase:
+        """
+        This is similar to what `FederatingHomeserverTestCase` is doing but we don't
+        need all of the extra baggage and we want to be able to create an event from
+        many remote servers.
+        """
+
+        # poke the other server's signing key into the key store, so that we don't
+        # make requests for it
+        other_server_signature_key = generate_signing_key("test")
+        verify_key = get_verify_key(other_server_signature_key)
+        verify_key_id = "%s:%s" % (verify_key.alg, verify_key.version)
+
+        self.get_success(
+            self.hs.get_datastores().main.store_server_keys_response(
+                remote_server_name,
+                from_server=remote_server_name,
+                ts_added_ms=self.clock.time_msec(),
+                verify_keys={
+                    verify_key_id: FetchKeyResult(
+                        verify_key=verify_key,
+                        valid_until_ts=self.clock.time_msec() + 10000,
+                    ),
+                },
+                response_json={
+                    "verify_keys": {
+                        verify_key_id: {"key": encode_verify_key_base64(verify_key)}
+                    }
+                },
+            )
+        )
+
+        add_hashes_and_signatures(
+            room_version=room_version,
+            event_dict=event_dict,
+            signature_name=remote_server_name,
+            signing_key=other_server_signature_key,
+        )
+        event = make_event_from_dict(
+            event_dict,
+            room_version=room_version,
+        )
+
+        return event
+
     def create_room_with_remote_server(
         self, user: str, token: str, remote_server: str = "other_server"
     ) -> str:
-        room = self.helper.create_room_as(user, tok=token)
+        room_id = self.helper.create_room_as(user, tok=token)
         store = self.hs.get_datastores().main
         federation = self.hs.get_federation_event_handler()
 
-        prev_event_ids = self.get_success(store.get_latest_event_ids_in_room(room))
-        room_version = self.get_success(store.get_room_version(room))
+        room_version = self.get_success(store.get_room_version(room_id))
 
-        factory = EventBuilderFactory(self.hs)
-        factory.hostname = remote_server
+        state_map = self.get_success(
+            self.storage_controllers.state.get_current_state(room_id)
+        )
+
+        # Figure out what the forward extremities in the room are (the most recent
+        # events that aren't tied into the DAG)
+        prev_event_ids = self.get_success(store.get_latest_event_ids_in_room(room_id))
 
         user_id = UserID("user", remote_server).to_string()
 
-        event_dict = {
-            "type": EventTypes.Member,
-            "state_key": user_id,
-            "content": {"membership": Membership.JOIN},
-            "sender": user_id,
-            "room_id": room,
-        }
-
-        builder = factory.for_room_version(room_version, event_dict)
-        join_event = self.get_success(
-            builder.build(prev_event_ids=list(prev_event_ids), auth_event_ids=None)
+        join_event = self.create_fake_event_from_remote_server(
+            remote_server_name=remote_server,
+            event_dict={
+                "room_id": room_id,
+                "sender": user_id,
+                "type": EventTypes.Member,
+                "state_key": user_id,
+                "depth": 1000,
+                "origin_server_ts": 1,
+                "content": {"membership": Membership.JOIN},
+                "auth_events": [
+                    state_map[(EventTypes.Create, "")].event_id,
+                    state_map[(EventTypes.JoinRules, "")].event_id,
+                ],
+                "prev_events": list(prev_event_ids),
+            },
+            room_version=room_version,
         )
 
         self.get_success(federation.on_send_membership_event(remote_server, join_event))
         self.replicate()
 
-        return room
+        return room_id
diff --git a/tests/rest/admin/test_event_reports.py b/tests/rest/admin/test_event_reports.py
index feb410a11d..6047ce1f4a 100644
--- a/tests/rest/admin/test_event_reports.py
+++ b/tests/rest/admin/test_event_reports.py
@@ -378,6 +378,41 @@ class EventReportsTestCase(unittest.HomeserverTestCase):
         self.assertEqual(len(channel.json_body["event_reports"]), 1)
         self.assertNotIn("next_token", channel.json_body)
 
+    def test_filter_against_event_sender(self) -> None:
+        """
+        Tests filtering by the sender of the reported event
+        """
+        # first grab all the reports
+        channel = self.make_request(
+            "GET",
+            self.url,
+            access_token=self.admin_user_tok,
+        )
+        self.assertEqual(channel.code, 200)
+
+        # filter out set of report ids of events sent by one of the users
+        locally_filtered_report_ids = set()
+        for event_report in channel.json_body["event_reports"]:
+            if event_report["sender"] == self.other_user:
+                locally_filtered_report_ids.add(event_report["id"])
+
+        # grab the report ids by sender and compare to filtered report ids
+        channel = self.make_request(
+            "GET",
+            f"{self.url}?event_sender_user_id={self.other_user}",
+            access_token=self.admin_user_tok,
+        )
+        self.assertEqual(200, channel.code)
+        self.assertEqual(channel.json_body["total"], len(locally_filtered_report_ids))
+
+        event_reports = channel.json_body["event_reports"]
+        server_filtered_report_ids = set()
+        for event_report in event_reports:
+            server_filtered_report_ids.add(event_report["id"])
+        self.assertIncludes(
+            locally_filtered_report_ids, server_filtered_report_ids, exact=True
+        )
+
     def _create_event_and_report(self, room_id: str, user_tok: str) -> None:
         """Create and report events"""
         resp = self.helper.send(room_id, tok=user_tok)
diff --git a/tests/rest/admin/test_room.py b/tests/rest/admin/test_room.py
index 95ed736451..1d44106bd7 100644
--- a/tests/rest/admin/test_room.py
+++ b/tests/rest/admin/test_room.py
@@ -1282,6 +1282,7 @@ class RoomTestCase(unittest.HomeserverTestCase):
         self.admin_user = self.register_user("admin", "pass", admin=True)
         self.admin_user_tok = self.login("admin", "pass")
 
+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
     def test_list_rooms(self) -> None:
         """Test that we can list rooms"""
         # Create 3 test rooms
@@ -1795,6 +1796,7 @@ class RoomTestCase(unittest.HomeserverTestCase):
         self.assertEqual(room_id, channel.json_body["rooms"][0].get("room_id"))
         self.assertEqual("ж", channel.json_body["rooms"][0].get("name"))
 
+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
     def test_filter_public_rooms(self) -> None:
         self.helper.create_room_as(
             self.admin_user, tok=self.admin_user_tok, is_public=True
@@ -1872,6 +1874,7 @@ class RoomTestCase(unittest.HomeserverTestCase):
         self.assertEqual(1, response.json_body["total_rooms"])
         self.assertEqual(1, len(response.json_body["rooms"]))
 
+    @unittest.override_config({"room_list_publication_rules": [{"action": "allow"}]})
     def test_single_room(self) -> None:
         """Test that a single room can be requested correctly"""
         # Create two test rooms
@@ -2035,6 +2038,52 @@ class RoomTestCase(unittest.HomeserverTestCase):
         # the create_room already does the right thing, so no need to verify that we got
         # the state events it created.
 
+    def test_room_state_param(self) -> None:
+        """Test that filtering by state event type works when requesting state"""
+        room_id = self.helper.create_room_as(self.admin_user, tok=self.admin_user_tok)
+
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/rooms/{room_id}/state?type=m.room.member",
+            access_token=self.admin_user_tok,
+        )
+        self.assertEqual(200, channel.code)
+        state = channel.json_body["state"]
+        # only one member has joined so there should be one membership event
+        self.assertEqual(1, len(state))
+        event = state[0]
+        self.assertEqual(event["type"], "m.room.member")
+        self.assertEqual(event["state_key"], self.admin_user)
+
+    def test_room_state_param_empty(self) -> None:
+        """Test that passing an empty string as state filter param returns no state events"""
+        room_id = self.helper.create_room_as(self.admin_user, tok=self.admin_user_tok)
+
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/rooms/{room_id}/state?type=",
+            access_token=self.admin_user_tok,
+        )
+        self.assertEqual(200, channel.code)
+        state = channel.json_body["state"]
+        self.assertEqual(5, len(state))
+
+    def test_room_state_param_not_in_room(self) -> None:
+        """
+        Test that passing a state filter param for a state event not in the room
+        returns no state events
+        """
+        room_id = self.helper.create_room_as(self.admin_user, tok=self.admin_user_tok)
+
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/rooms/{room_id}/state?type=m.room.custom",
+            access_token=self.admin_user_tok,
+        )
+        self.assertEqual(200, channel.code)
+        state = channel.json_body["state"]
+        self.assertEqual(0, len(state))
+
     def _set_canonical_alias(
         self, room_id: str, test_alias: str, admin_user_tok: str
     ) -> None:
@@ -3050,7 +3099,7 @@ PURGE_TABLES = [
     "pusher_throttle",
     "room_account_data",
     "room_tags",
-    # "state_groups",  # Current impl leaves orphaned state groups around.
+    "state_groups",
     "state_groups_state",
     "federation_inbound_events_staging",
 ]
diff --git a/tests/rest/admin/test_user.py b/tests/rest/admin/test_user.py
index 6d050e7784..a35a250975 100644
--- a/tests/rest/admin/test_user.py
+++ b/tests/rest/admin/test_user.py
@@ -60,6 +60,7 @@ from synapse.util import Clock
 from tests import unittest
 from tests.replication._base import BaseMultiWorkerStreamTestCase
 from tests.test_utils import SMALL_PNG
+from tests.test_utils.event_injection import inject_event
 from tests.unittest import override_config
 
 
@@ -3222,6 +3223,7 @@ class UserRestTestCase(unittest.HomeserverTestCase):
         self.assertIn("consent_ts", content)
         self.assertIn("external_ids", content)
         self.assertIn("last_seen_ts", content)
+        self.assertIn("suspended", content)
 
         # This key was removed intentionally. Ensure it is not accidentally re-included.
         self.assertNotIn("password_hash", content)
@@ -5030,7 +5032,6 @@ class UserSuspensionTestCase(unittest.HomeserverTestCase):
 
         self.store = hs.get_datastores().main
 
-    @override_config({"experimental_features": {"msc3823_account_suspension": True}})
     def test_suspend_user(self) -> None:
         # test that suspending user works
         channel = self.make_request(
@@ -5408,6 +5409,64 @@ class UserRedactionTestCase(unittest.HomeserverTestCase):
         # we redacted 6 messages
         self.assertEqual(len(matches), 6)
 
+    def test_redactions_for_remote_user_succeed_with_admin_priv_in_room(self) -> None:
+        """
+        Test that if the admin requester has privileges in a room, redaction requests
+        succeed for a remote user
+        """
+
+        # inject some messages from remote user and collect event ids
+        original_message_ids = []
+        for i in range(5):
+            event = self.get_success(
+                inject_event(
+                    self.hs,
+                    room_id=self.rm1,
+                    type="m.room.message",
+                    sender="@remote:remote_server",
+                    content={"msgtype": "m.text", "body": f"nefarious_chatter{i}"},
+                )
+            )
+            original_message_ids.append(event.event_id)
+
+        # send a request to redact a remote user's messages in a room.
+        # the server admin created this room and has admin privilege in room
+        channel = self.make_request(
+            "POST",
+            "/_synapse/admin/v1/user/@remote:remote_server/redact",
+            content={"rooms": [self.rm1]},
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        id = channel.json_body.get("redact_id")
+
+        # check that there were no failed redactions
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/user/redact_status/{id}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body.get("status"), "complete")
+        failed_redactions = channel.json_body.get("failed_redactions")
+        self.assertEqual(failed_redactions, {})
+
+        filter = json.dumps({"types": [EventTypes.Redaction]})
+        channel = self.make_request(
+            "GET",
+            f"rooms/{self.rm1}/messages?filter={filter}&limit=50",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+
+        for event in channel.json_body["chunk"]:
+            for event_id in original_message_ids:
+                if event["type"] == "m.room.redaction" and event["redacts"] == event_id:
+                    original_message_ids.remove(event_id)
+                    break
+        # we originally sent 5 messages so 5 should be redacted
+        self.assertEqual(len(original_message_ids), 0)
+
 
 class UserRedactionBackgroundTaskTestCase(BaseMultiWorkerStreamTestCase):
     servlets = [
@@ -5502,3 +5561,254 @@ class UserRedactionBackgroundTaskTestCase(BaseMultiWorkerStreamTestCase):
                     redaction_ids.add(event["redacts"])
 
         self.assertIncludes(redaction_ids, original_event_ids, exact=True)
+
+
+class GetInvitesFromUserTestCase(unittest.HomeserverTestCase):
+    servlets = [
+        synapse.rest.admin.register_servlets,
+        login.register_servlets,
+        admin.register_servlets,
+        room.register_servlets,
+    ]
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.admin = self.register_user("thomas", "pass", True)
+        self.admin_tok = self.login("thomas", "pass")
+
+        self.bad_user = self.register_user("teresa", "pass")
+        self.bad_user_tok = self.login("teresa", "pass")
+
+        self.random_users = []
+        for i in range(4):
+            self.random_users.append(self.register_user(f"user{i}", f"pass{i}"))
+
+        self.room1 = self.helper.create_room_as(self.bad_user, tok=self.bad_user_tok)
+        self.room2 = self.helper.create_room_as(self.bad_user, tok=self.bad_user_tok)
+        self.room3 = self.helper.create_room_as(self.bad_user, tok=self.bad_user_tok)
+
+    @unittest.override_config(
+        {"rc_invites": {"per_issuer": {"per_second": 1000, "burst_count": 1000}}}
+    )
+    def test_get_user_invite_count_new_invites_test_case(self) -> None:
+        """
+        Test that new invites that arrive after a provided timestamp are counted
+        """
+        # grab a current timestamp
+        before_invites_sent_ts = self.hs.get_clock().time_msec()
+
+        # bad user sends some invites
+        for room_id in [self.room1, self.room2]:
+            for user in self.random_users:
+                self.helper.invite(room_id, self.bad_user, user, tok=self.bad_user_tok)
+
+        # fetch using timestamp, all should be returned
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/sent_invite_count?from_ts={before_invites_sent_ts}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body["invite_count"], 8)
+
+        # send some more invites, they should show up in addition to original 8 using same timestamp
+        for user in self.random_users:
+            self.helper.invite(
+                self.room3, src=self.bad_user, targ=user, tok=self.bad_user_tok
+            )
+
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/sent_invite_count?from_ts={before_invites_sent_ts}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body["invite_count"], 12)
+
+    def test_get_user_invite_count_invites_before_ts_test_case(self) -> None:
+        """
+        Test that invites sent before provided ts are not counted
+        """
+        # bad user sends some invites
+        for room_id in [self.room1, self.room2]:
+            for user in self.random_users:
+                self.helper.invite(room_id, self.bad_user, user, tok=self.bad_user_tok)
+
+        # add a msec between last invite and ts
+        after_invites_sent_ts = self.hs.get_clock().time_msec() + 1
+
+        # fetch invites with timestamp, none should be returned
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/sent_invite_count?from_ts={after_invites_sent_ts}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body["invite_count"], 0)
+
+    def test_user_invite_count_kick_ban_not_counted(self) -> None:
+        """
+        Test that kicks and bans are not counted in invite count
+        """
+        to_kick_user_id = self.register_user("kick_me", "pass")
+        to_kick_tok = self.login("kick_me", "pass")
+
+        self.helper.join(self.room1, to_kick_user_id, tok=to_kick_tok)
+
+        # grab a current timestamp
+        before_invites_sent_ts = self.hs.get_clock().time_msec()
+
+        # bad user sends some invites (8)
+        for room_id in [self.room1, self.room2]:
+            for user in self.random_users:
+                self.helper.invite(
+                    room_id, src=self.bad_user, targ=user, tok=self.bad_user_tok
+                )
+
+        # fetch using timestamp, all invites sent should be counted
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/sent_invite_count?from_ts={before_invites_sent_ts}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body["invite_count"], 8)
+
+        # send a kick and some bans and make sure these aren't counted against invite total
+        for user in self.random_users:
+            self.helper.ban(
+                self.room1, src=self.bad_user, targ=user, tok=self.bad_user_tok
+            )
+
+        channel = self.make_request(
+            "POST",
+            f"/_matrix/client/v3/rooms/{self.room1}/kick",
+            content={"user_id": to_kick_user_id},
+            access_token=self.bad_user_tok,
+        )
+        self.assertEqual(channel.code, 200)
+
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/sent_invite_count?from_ts={before_invites_sent_ts}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body["invite_count"], 8)
+
+
+class GetCumulativeJoinedRoomCountForUserTestCase(unittest.HomeserverTestCase):
+    servlets = [
+        synapse.rest.admin.register_servlets,
+        login.register_servlets,
+        admin.register_servlets,
+        room.register_servlets,
+    ]
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.admin = self.register_user("thomas", "pass", True)
+        self.admin_tok = self.login("thomas", "pass")
+
+        self.bad_user = self.register_user("teresa", "pass")
+        self.bad_user_tok = self.login("teresa", "pass")
+
+    def test_user_cumulative_joined_room_count(self) -> None:
+        """
+        Tests proper count returned from /cumulative_joined_room_count endpoint
+        """
+        # Create rooms and join, grab timestamp before room creation
+        before_room_creation_timestamp = self.hs.get_clock().time_msec()
+
+        joined_rooms = []
+        for _ in range(3):
+            room = self.helper.create_room_as(self.admin, tok=self.admin_tok)
+            self.helper.join(
+                room, user=self.bad_user, expect_code=200, tok=self.bad_user_tok
+            )
+            joined_rooms.append(room)
+
+        # get a timestamp after room creation and join, add a msec between last join and ts
+        after_room_creation = self.hs.get_clock().time_msec() + 1
+
+        # Get rooms using this timestamp, there should be none since all rooms were created and joined
+        # before provided timestamp
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/cumulative_joined_room_count?from_ts={int(after_room_creation)}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(200, channel.code, msg=channel.json_body)
+        self.assertEqual(0, channel.json_body["cumulative_joined_room_count"])
+
+        # fetch rooms with the older timestamp before they were created and joined, this should
+        # return the rooms
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/cumulative_joined_room_count?from_ts={int(before_room_creation_timestamp)}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(200, channel.code, msg=channel.json_body)
+        self.assertEqual(
+            len(joined_rooms), channel.json_body["cumulative_joined_room_count"]
+        )
+
+    def test_user_joined_room_count_includes_left_and_banned_rooms(self) -> None:
+        """
+        Tests proper count returned from /joined_room_count endpoint when user has left
+        or been banned from joined rooms
+        """
+        # Create rooms and join, grab timestamp before room creation
+        before_room_creation_timestamp = self.hs.get_clock().time_msec()
+
+        joined_rooms = []
+        for _ in range(3):
+            room = self.helper.create_room_as(self.admin, tok=self.admin_tok)
+            self.helper.join(
+                room, user=self.bad_user, expect_code=200, tok=self.bad_user_tok
+            )
+            joined_rooms.append(room)
+
+        # fetch rooms with the older timestamp before they were created and joined
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/cumulative_joined_room_count?from_ts={int(before_room_creation_timestamp)}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(200, channel.code, msg=channel.json_body)
+        self.assertEqual(
+            len(joined_rooms), channel.json_body["cumulative_joined_room_count"]
+        )
+
+        # have the user banned from/leave the joined rooms
+        self.helper.ban(
+            joined_rooms[0],
+            src=self.admin,
+            targ=self.bad_user,
+            expect_code=200,
+            tok=self.admin_tok,
+        )
+        self.helper.change_membership(
+            joined_rooms[1],
+            src=self.bad_user,
+            targ=self.bad_user,
+            membership="leave",
+            expect_code=200,
+            tok=self.bad_user_tok,
+        )
+        self.helper.ban(
+            joined_rooms[2],
+            src=self.admin,
+            targ=self.bad_user,
+            expect_code=200,
+            tok=self.admin_tok,
+        )
+
+        # fetch the joined room count again, the number should remain the same as the collected joined rooms
+        channel = self.make_request(
+            "GET",
+            f"/_synapse/admin/v1/users/{self.bad_user}/cumulative_joined_room_count?from_ts={int(before_room_creation_timestamp)}",
+            access_token=self.admin_tok,
+        )
+        self.assertEqual(200, channel.code, msg=channel.json_body)
+        self.assertEqual(
+            len(joined_rooms), channel.json_body["cumulative_joined_room_count"]
+        )
diff --git a/tests/rest/client/sliding_sync/test_rooms_required_state.py b/tests/rest/client/sliding_sync/test_rooms_required_state.py
index be13f94538..ba46c5a93c 100644
--- a/tests/rest/client/sliding_sync/test_rooms_required_state.py
+++ b/tests/rest/client/sliding_sync/test_rooms_required_state.py
@@ -11,6 +11,7 @@
 # See the GNU Affero General Public License for more details:
 # <https://www.gnu.org/licenses/agpl-3.0.html>.
 #
+import enum
 import logging
 
 from parameterized import parameterized, parameterized_class
@@ -18,9 +19,9 @@ from parameterized import parameterized, parameterized_class
 from twisted.test.proto_helpers import MemoryReactor
 
 import synapse.rest.admin
-from synapse.api.constants import EventTypes, Membership
+from synapse.api.constants import EventContentFields, EventTypes, JoinRules, Membership
 from synapse.handlers.sliding_sync import StateValues
-from synapse.rest.client import login, room, sync
+from synapse.rest.client import knock, login, room, sync
 from synapse.server import HomeServer
 from synapse.util import Clock
 
@@ -30,6 +31,17 @@ from tests.test_utils.event_injection import mark_event_as_partial_state
 logger = logging.getLogger(__name__)
 
 
+# Inherit from `str` so that they show up in the test description when we
+# `@parameterized.expand(...)` the first parameter
+class MembershipAction(str, enum.Enum):
+    INVITE = "invite"
+    JOIN = "join"
+    KNOCK = "knock"
+    LEAVE = "leave"
+    BAN = "ban"
+    KICK = "kick"
+
+
 # FIXME: This can be removed once we bump `SCHEMA_COMPAT_VERSION` and run the
 # foreground update for
 # `sliding_sync_joined_rooms`/`sliding_sync_membership_snapshots` (tracked by
@@ -52,6 +64,7 @@ class SlidingSyncRoomsRequiredStateTestCase(SlidingSyncBase):
     servlets = [
         synapse.rest.admin.register_servlets,
         login.register_servlets,
+        knock.register_servlets,
         room.register_servlets,
         sync.register_servlets,
     ]
@@ -496,6 +509,153 @@ class SlidingSyncRoomsRequiredStateTestCase(SlidingSyncBase):
         )
         self.assertIsNone(response_body["rooms"][room_id1].get("invite_state"))
 
+    @parameterized.expand(
+        [
+            (MembershipAction.LEAVE,),
+            (MembershipAction.INVITE,),
+            (MembershipAction.KNOCK,),
+            (MembershipAction.JOIN,),
+            (MembershipAction.BAN,),
+            (MembershipAction.KICK,),
+        ]
+    )
+    def test_rooms_required_state_changed_membership_in_timeline_lazy_loading_room_members_incremental_sync(
+        self,
+        room_membership_action: str,
+    ) -> None:
+        """
+        On incremental sync, test `rooms.required_state` returns people relevant to the
+        timeline when lazy-loading room members, `["m.room.member","$LAZY"]` **including
+        changes to membership**.
+        """
+        user1_id = self.register_user("user1", "pass")
+        user1_tok = self.login(user1_id, "pass")
+        user2_id = self.register_user("user2", "pass")
+        user2_tok = self.login(user2_id, "pass")
+        user3_id = self.register_user("user3", "pass")
+        user3_tok = self.login(user3_id, "pass")
+        user4_id = self.register_user("user4", "pass")
+        user4_tok = self.login(user4_id, "pass")
+        user5_id = self.register_user("user5", "pass")
+        user5_tok = self.login(user5_id, "pass")
+
+        room_id1 = self.helper.create_room_as(user2_id, tok=user2_tok, is_public=True)
+        # If we're testing knocks, set the room to knock
+        if room_membership_action == MembershipAction.KNOCK:
+            self.helper.send_state(
+                room_id1,
+                EventTypes.JoinRules,
+                {"join_rule": JoinRules.KNOCK},
+                tok=user2_tok,
+            )
+
+        # Join the test users to the room
+        self.helper.invite(room_id1, src=user2_id, targ=user1_id, tok=user2_tok)
+        self.helper.join(room_id1, user1_id, tok=user1_tok)
+        self.helper.invite(room_id1, src=user2_id, targ=user3_id, tok=user2_tok)
+        self.helper.join(room_id1, user3_id, tok=user3_tok)
+        self.helper.invite(room_id1, src=user2_id, targ=user4_id, tok=user2_tok)
+        self.helper.join(room_id1, user4_id, tok=user4_tok)
+        if room_membership_action in (
+            MembershipAction.LEAVE,
+            MembershipAction.BAN,
+            MembershipAction.JOIN,
+        ):
+            self.helper.invite(room_id1, src=user2_id, targ=user5_id, tok=user2_tok)
+            self.helper.join(room_id1, user5_id, tok=user5_tok)
+
+        # Send some messages to fill up the space
+        self.helper.send(room_id1, "1", tok=user2_tok)
+        self.helper.send(room_id1, "2", tok=user2_tok)
+        self.helper.send(room_id1, "3", tok=user2_tok)
+
+        # Make the Sliding Sync request with lazy loading for the room members
+        sync_body = {
+            "lists": {
+                "foo-list": {
+                    "ranges": [[0, 1]],
+                    "required_state": [
+                        [EventTypes.Create, ""],
+                        [EventTypes.Member, StateValues.LAZY],
+                    ],
+                    "timeline_limit": 3,
+                }
+            }
+        }
+        response_body, from_token = self.do_sync(sync_body, tok=user1_tok)
+
+        # Send more timeline events into the room
+        self.helper.send(room_id1, "4", tok=user2_tok)
+        self.helper.send(room_id1, "5", tok=user4_tok)
+        # The third event will be our membership event concerning user5
+        if room_membership_action == MembershipAction.LEAVE:
+            # User 5 leaves
+            self.helper.leave(room_id1, user5_id, tok=user5_tok)
+        elif room_membership_action == MembershipAction.INVITE:
+            # User 5 is invited
+            self.helper.invite(room_id1, src=user2_id, targ=user5_id, tok=user2_tok)
+        elif room_membership_action == MembershipAction.KNOCK:
+            # User 5 knocks
+            self.helper.knock(room_id1, user5_id, tok=user5_tok)
+            # The admin of the room accepts the knock
+            self.helper.invite(room_id1, src=user2_id, targ=user5_id, tok=user2_tok)
+        elif room_membership_action == MembershipAction.JOIN:
+            # Update the display name of user5 (causing a membership change)
+            self.helper.send_state(
+                room_id1,
+                event_type=EventTypes.Member,
+                state_key=user5_id,
+                body={
+                    EventContentFields.MEMBERSHIP: Membership.JOIN,
+                    EventContentFields.MEMBERSHIP_DISPLAYNAME: "quick changer",
+                },
+                tok=user5_tok,
+            )
+        elif room_membership_action == MembershipAction.BAN:
+            self.helper.ban(room_id1, src=user2_id, targ=user5_id, tok=user2_tok)
+        elif room_membership_action == MembershipAction.KICK:
+            # Kick user5 from the room
+            self.helper.change_membership(
+                room=room_id1,
+                src=user2_id,
+                targ=user5_id,
+                tok=user2_tok,
+                membership=Membership.LEAVE,
+                extra_data={
+                    "reason": "Bad manners",
+                },
+            )
+        else:
+            raise AssertionError(
+                f"Unknown room_membership_action: {room_membership_action}"
+            )
+
+        # Make an incremental Sliding Sync request
+        response_body, _ = self.do_sync(sync_body, since=from_token, tok=user1_tok)
+
+        state_map = self.get_success(
+            self.storage_controllers.state.get_current_state(room_id1)
+        )
+
+        # Only user2, user4, and user5 sent events in the last 3 events we see in the
+        # `timeline`.
+        self._assertRequiredStateIncludes(
+            response_body["rooms"][room_id1]["required_state"],
+            {
+                # This appears because *some* membership in the room changed and the
+                # heroes are recalculated and is thrown in because we have it. But this
+                # is technically optional and not needed because we've already seen user2
+                # in the last sync (and their membership hasn't changed).
+                state_map[(EventTypes.Member, user2_id)],
+                # Appears because there is a message in the timeline from this user
+                state_map[(EventTypes.Member, user4_id)],
+                # Appears because there is a membership event in the timeline from this user
+                state_map[(EventTypes.Member, user5_id)],
+            },
+            exact=True,
+        )
+        self.assertIsNone(response_body["rooms"][room_id1].get("invite_state"))
+
     def test_rooms_required_state_expand_lazy_loading_room_members_incremental_sync(
         self,
     ) -> None:
@@ -1397,7 +1557,7 @@ class SlidingSyncRoomsRequiredStateTestCase(SlidingSyncBase):
 
         # Update the room name
         self.helper.send_state(
-            room_id1, "m.room.name", {"name": "Bar"}, state_key="", tok=user1_tok
+            room_id1, EventTypes.Name, {"name": "Bar"}, state_key="", tok=user1_tok
         )
 
         # Update the sliding sync requests to exclude the room name again
diff --git a/tests/rest/client/sliding_sync/test_sliding_sync.py b/tests/rest/client/sliding_sync/test_sliding_sync.py
index 578cb384cd..f3cf2111ec 100644
--- a/tests/rest/client/sliding_sync/test_sliding_sync.py
+++ b/tests/rest/client/sliding_sync/test_sliding_sync.py
@@ -1169,12 +1169,6 @@ class SlidingSyncTestCase(SlidingSyncBase):
             self.persistence.persist_event(join_rule_event, join_rule_context)
         )
 
-        # FIXME: We're manually busting the cache since
-        # https://github.com/element-hq/synapse/issues/17368 is not solved yet
-        self.store._membership_stream_cache.entity_has_changed(
-            user1_id, join_rule_event_pos.stream
-        )
-
         # Ensure that the state reset worked and only user2 is in the room now
         users_in_room = self.get_success(self.store.get_users_in_room(room_id1))
         self.assertIncludes(set(users_in_room), {user2_id}, exact=True)
@@ -1322,12 +1316,6 @@ class SlidingSyncTestCase(SlidingSyncBase):
             self.persistence.persist_event(join_rule_event, join_rule_context)
         )
 
-        # FIXME: We're manually busting the cache since
-        # https://github.com/element-hq/synapse/issues/17368 is not solved yet
-        self.store._membership_stream_cache.entity_has_changed(
-            user1_id, join_rule_event_pos.stream
-        )
-
         # Ensure that the state reset worked and only user2 is in the room now
         users_in_room = self.get_success(self.store.get_users_in_room(space_room_id))
         self.assertIncludes(set(users_in_room), {user2_id}, exact=True)
@@ -1506,12 +1494,6 @@ class SlidingSyncTestCase(SlidingSyncBase):
             self.persistence.persist_event(join_rule_event, join_rule_context)
         )
 
-        # FIXME: We're manually busting the cache since
-        # https://github.com/element-hq/synapse/issues/17368 is not solved yet
-        self.store._membership_stream_cache.entity_has_changed(
-            user1_id, join_rule_event_pos.stream
-        )
-
         # Ensure that the state reset worked and only user2 is in the room now
         users_in_room = self.get_success(self.store.get_users_in_room(space_room_id))
         self.assertIncludes(set(users_in_room), {user2_id}, exact=True)
diff --git a/tests/rest/client/test_auth_issuer.py b/tests/rest/client/test_auth_issuer.py
deleted file mode 100644
index d6f334a7ab..0000000000
--- a/tests/rest/client/test_auth_issuer.py
+++ /dev/null
@@ -1,79 +0,0 @@
-# Copyright 2023 The Matrix.org Foundation C.I.C.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-from http import HTTPStatus
-from unittest.mock import AsyncMock
-
-from synapse.rest.client import auth_issuer
-
-from tests.unittest import HomeserverTestCase, override_config, skip_unless
-from tests.utils import HAS_AUTHLIB
-
-ISSUER = "https://account.example.com/"
-
-
-class AuthIssuerTestCase(HomeserverTestCase):
-    servlets = [
-        auth_issuer.register_servlets,
-    ]
-
-    def test_returns_404_when_msc3861_disabled(self) -> None:
-        # Make an unauthenticated request for the discovery info.
-        channel = self.make_request(
-            "GET",
-            "/_matrix/client/unstable/org.matrix.msc2965/auth_issuer",
-        )
-        self.assertEqual(channel.code, HTTPStatus.NOT_FOUND)
-
-    @skip_unless(HAS_AUTHLIB, "requires authlib")
-    @override_config(
-        {
-            "disable_registration": True,
-            "experimental_features": {
-                "msc3861": {
-                    "enabled": True,
-                    "issuer": ISSUER,
-                    "client_id": "David Lister",
-                    "client_auth_method": "client_secret_post",
-                    "client_secret": "Who shot Mister Burns?",
-                }
-            },
-        }
-    )
-    def test_returns_issuer_when_oidc_enabled(self) -> None:
-        # Patch the HTTP client to return the issuer metadata
-        req_mock = AsyncMock(return_value={"issuer": ISSUER})
-        self.hs.get_proxied_http_client().get_json = req_mock  # type: ignore[method-assign]
-
-        channel = self.make_request(
-            "GET",
-            "/_matrix/client/unstable/org.matrix.msc2965/auth_issuer",
-        )
-
-        self.assertEqual(channel.code, HTTPStatus.OK)
-        self.assertEqual(channel.json_body, {"issuer": ISSUER})
-
-        req_mock.assert_called_with(
-            "https://account.example.com/.well-known/openid-configuration"
-        )
-        req_mock.reset_mock()
-
-        # Second call it should use the cached value
-        channel = self.make_request(
-            "GET",
-            "/_matrix/client/unstable/org.matrix.msc2965/auth_issuer",
-        )
-
-        self.assertEqual(channel.code, HTTPStatus.OK)
-        self.assertEqual(channel.json_body, {"issuer": ISSUER})
-        req_mock.assert_not_called()
diff --git a/tests/rest/client/test_auth_metadata.py b/tests/rest/client/test_auth_metadata.py
new file mode 100644
index 0000000000..a935533b09
--- /dev/null
+++ b/tests/rest/client/test_auth_metadata.py
@@ -0,0 +1,140 @@
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright 2023 The Matrix.org Foundation C.I.C
+# Copyright (C) 2023-2025 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+# Originally licensed under the Apache License, Version 2.0:
+# <http://www.apache.org/licenses/LICENSE-2.0>.
+#
+# [This file includes modifications made by New Vector Limited]
+#
+from http import HTTPStatus
+from unittest.mock import AsyncMock
+
+from synapse.rest.client import auth_metadata
+
+from tests.unittest import HomeserverTestCase, override_config, skip_unless
+from tests.utils import HAS_AUTHLIB
+
+ISSUER = "https://account.example.com/"
+
+
+class AuthIssuerTestCase(HomeserverTestCase):
+    servlets = [
+        auth_metadata.register_servlets,
+    ]
+
+    def test_returns_404_when_msc3861_disabled(self) -> None:
+        # Make an unauthenticated request for the discovery info.
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/unstable/org.matrix.msc2965/auth_issuer",
+        )
+        self.assertEqual(channel.code, HTTPStatus.NOT_FOUND)
+
+    @skip_unless(HAS_AUTHLIB, "requires authlib")
+    @override_config(
+        {
+            "disable_registration": True,
+            "experimental_features": {
+                "msc3861": {
+                    "enabled": True,
+                    "issuer": ISSUER,
+                    "client_id": "David Lister",
+                    "client_auth_method": "client_secret_post",
+                    "client_secret": "Who shot Mister Burns?",
+                }
+            },
+        }
+    )
+    def test_returns_issuer_when_oidc_enabled(self) -> None:
+        # Patch the HTTP client to return the issuer metadata
+        req_mock = AsyncMock(return_value={"issuer": ISSUER})
+        self.hs.get_proxied_http_client().get_json = req_mock  # type: ignore[method-assign]
+
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/unstable/org.matrix.msc2965/auth_issuer",
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertEqual(channel.json_body, {"issuer": ISSUER})
+
+        req_mock.assert_called_with(
+            "https://account.example.com/.well-known/openid-configuration"
+        )
+        req_mock.reset_mock()
+
+        # Second call it should use the cached value
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/unstable/org.matrix.msc2965/auth_issuer",
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertEqual(channel.json_body, {"issuer": ISSUER})
+        req_mock.assert_not_called()
+
+
+class AuthMetadataTestCase(HomeserverTestCase):
+    servlets = [
+        auth_metadata.register_servlets,
+    ]
+
+    def test_returns_404_when_msc3861_disabled(self) -> None:
+        # Make an unauthenticated request for the discovery info.
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/unstable/org.matrix.msc2965/auth_metadata",
+        )
+        self.assertEqual(channel.code, HTTPStatus.NOT_FOUND)
+
+    @skip_unless(HAS_AUTHLIB, "requires authlib")
+    @override_config(
+        {
+            "disable_registration": True,
+            "experimental_features": {
+                "msc3861": {
+                    "enabled": True,
+                    "issuer": ISSUER,
+                    "client_id": "David Lister",
+                    "client_auth_method": "client_secret_post",
+                    "client_secret": "Who shot Mister Burns?",
+                }
+            },
+        }
+    )
+    def test_returns_issuer_when_oidc_enabled(self) -> None:
+        # Patch the HTTP client to return the issuer metadata
+        req_mock = AsyncMock(
+            return_value={
+                "issuer": ISSUER,
+                "authorization_endpoint": "https://example.com/auth",
+                "token_endpoint": "https://example.com/token",
+            }
+        )
+        self.hs.get_proxied_http_client().get_json = req_mock  # type: ignore[method-assign]
+
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/unstable/org.matrix.msc2965/auth_metadata",
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertEqual(
+            channel.json_body,
+            {
+                "issuer": ISSUER,
+                "authorization_endpoint": "https://example.com/auth",
+                "token_endpoint": "https://example.com/token",
+            },
+        )
diff --git a/tests/rest/client/test_capabilities.py b/tests/rest/client/test_capabilities.py
index bbe8ab1a7c..8af00221c2 100644
--- a/tests/rest/client/test_capabilities.py
+++ b/tests/rest/client/test_capabilities.py
@@ -142,6 +142,50 @@ class CapabilitiesTestCase(unittest.HomeserverTestCase):
         self.assertEqual(channel.code, HTTPStatus.OK)
         self.assertFalse(capabilities["m.set_avatar_url"]["enabled"])
 
+    @override_config(
+        {
+            "enable_set_displayname": False,
+            "experimental_features": {"msc4133_enabled": True},
+        }
+    )
+    def test_get_set_displayname_capabilities_displayname_disabled_msc4133(
+        self,
+    ) -> None:
+        """Test if set displayname is disabled that the server responds it."""
+        access_token = self.login(self.localpart, self.password)
+
+        channel = self.make_request("GET", self.url, access_token=access_token)
+        capabilities = channel.json_body["capabilities"]
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertFalse(capabilities["m.set_displayname"]["enabled"])
+        self.assertTrue(capabilities["uk.tcpip.msc4133.profile_fields"]["enabled"])
+        self.assertEqual(
+            capabilities["uk.tcpip.msc4133.profile_fields"]["disallowed"],
+            ["displayname"],
+        )
+
+    @override_config(
+        {
+            "enable_set_avatar_url": False,
+            "experimental_features": {"msc4133_enabled": True},
+        }
+    )
+    def test_get_set_avatar_url_capabilities_avatar_url_disabled_msc4133(self) -> None:
+        """Test if set avatar_url is disabled that the server responds it."""
+        access_token = self.login(self.localpart, self.password)
+
+        channel = self.make_request("GET", self.url, access_token=access_token)
+        capabilities = channel.json_body["capabilities"]
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertFalse(capabilities["m.set_avatar_url"]["enabled"])
+        self.assertTrue(capabilities["uk.tcpip.msc4133.profile_fields"]["enabled"])
+        self.assertEqual(
+            capabilities["uk.tcpip.msc4133.profile_fields"]["disallowed"],
+            ["avatar_url"],
+        )
+
     @override_config({"enable_3pid_changes": False})
     def test_get_change_3pid_capabilities_3pid_disabled(self) -> None:
         """Test if change 3pid is disabled that the server responds it."""
diff --git a/tests/rest/client/test_delayed_events.py b/tests/rest/client/test_delayed_events.py
index 1793b38c4a..9f9d241f12 100644
--- a/tests/rest/client/test_delayed_events.py
+++ b/tests/rest/client/test_delayed_events.py
@@ -22,7 +22,8 @@ from parameterized import parameterized
 from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.errors import Codes
-from synapse.rest.client import delayed_events, room, versions
+from synapse.rest import admin
+from synapse.rest.client import delayed_events, login, room, versions
 from synapse.server import HomeServer
 from synapse.types import JsonDict
 from synapse.util import Clock
@@ -32,7 +33,6 @@ from tests.unittest import HomeserverTestCase
 
 PATH_PREFIX = "/_matrix/client/unstable/org.matrix.msc4140/delayed_events"
 
-_HS_NAME = "red"
 _EVENT_TYPE = "com.example.test"
 
 
@@ -54,23 +54,41 @@ class DelayedEventsUnstableSupportTestCase(HomeserverTestCase):
 class DelayedEventsTestCase(HomeserverTestCase):
     """Tests getting and managing delayed events."""
 
-    servlets = [delayed_events.register_servlets, room.register_servlets]
-    user_id = f"@sid1:{_HS_NAME}"
+    servlets = [
+        admin.register_servlets,
+        delayed_events.register_servlets,
+        login.register_servlets,
+        room.register_servlets,
+    ]
 
     def default_config(self) -> JsonDict:
         config = super().default_config()
-        config["server_name"] = _HS_NAME
         config["max_event_delay_duration"] = "24h"
         return config
 
     def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.user1_user_id = self.register_user("user1", "pass")
+        self.user1_access_token = self.login("user1", "pass")
+        self.user2_user_id = self.register_user("user2", "pass")
+        self.user2_access_token = self.login("user2", "pass")
+
         self.room_id = self.helper.create_room_as(
-            self.user_id,
+            self.user1_user_id,
+            tok=self.user1_access_token,
             extra_content={
-                "preset": "trusted_private_chat",
+                "preset": "public_chat",
+                "power_level_content_override": {
+                    "events": {
+                        _EVENT_TYPE: 0,
+                    }
+                },
             },
         )
 
+        self.helper.join(
+            room=self.room_id, user=self.user2_user_id, tok=self.user2_access_token
+        )
+
     def test_delayed_events_empty_on_startup(self) -> None:
         self.assertListEqual([], self._get_delayed_events())
 
@@ -85,6 +103,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             {
                 setter_key: setter_expected,
             },
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         events = self._get_delayed_events()
@@ -94,7 +113,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
             expect_code=HTTPStatus.NOT_FOUND,
         )
@@ -104,15 +123,39 @@ class DelayedEventsTestCase(HomeserverTestCase):
         content = self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
         )
         self.assertEqual(setter_expected, content.get(setter_key), content)
 
+    @unittest.override_config(
+        {"rc_delayed_event_mgmt": {"per_second": 0.5, "burst_count": 1}}
+    )
+    def test_get_delayed_events_ratelimit(self) -> None:
+        args = ("GET", PATH_PREFIX, b"", self.user1_access_token)
+
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(
+                self.user1_user_id, 0, 0
+            )
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
     def test_update_delayed_event_without_id(self) -> None:
         channel = self.make_request(
             "POST",
             f"{PATH_PREFIX}/",
+            access_token=self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.NOT_FOUND, channel.code, channel.result)
 
@@ -120,6 +163,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         channel = self.make_request(
             "POST",
             f"{PATH_PREFIX}/abc",
+            access_token=self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.BAD_REQUEST, channel.code, channel.result)
         self.assertEqual(
@@ -132,6 +176,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             "POST",
             f"{PATH_PREFIX}/abc",
             {},
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.BAD_REQUEST, channel.code, channel.result)
         self.assertEqual(
@@ -144,6 +189,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             "POST",
             f"{PATH_PREFIX}/abc",
             {"action": "oops"},
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.BAD_REQUEST, channel.code, channel.result)
         self.assertEqual(
@@ -157,6 +203,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             "POST",
             f"{PATH_PREFIX}/abc",
             {"action": action},
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.NOT_FOUND, channel.code, channel.result)
 
@@ -171,6 +218,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             {
                 setter_key: setter_expected,
             },
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         delay_id = channel.json_body.get("delay_id")
@@ -184,7 +232,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
             expect_code=HTTPStatus.NOT_FOUND,
         )
@@ -193,6 +241,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             "POST",
             f"{PATH_PREFIX}/{delay_id}",
             {"action": "cancel"},
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         self.assertListEqual([], self._get_delayed_events())
@@ -201,11 +250,56 @@ class DelayedEventsTestCase(HomeserverTestCase):
         content = self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
             expect_code=HTTPStatus.NOT_FOUND,
         )
 
+    @unittest.override_config(
+        {"rc_delayed_event_mgmt": {"per_second": 0.5, "burst_count": 1}}
+    )
+    def test_cancel_delayed_event_ratelimit(self) -> None:
+        delay_ids = []
+        for _ in range(2):
+            channel = self.make_request(
+                "POST",
+                _get_path_for_delayed_send(self.room_id, _EVENT_TYPE, 100000),
+                {},
+                self.user1_access_token,
+            )
+            self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+            delay_id = channel.json_body.get("delay_id")
+            self.assertIsNotNone(delay_id)
+            delay_ids.append(delay_id)
+
+        channel = self.make_request(
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "cancel"},
+            self.user1_access_token,
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        args = (
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "cancel"},
+            self.user1_access_token,
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(
+                self.user1_user_id, 0, 0
+            )
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
     def test_send_delayed_state_event(self) -> None:
         state_key = "to_send_on_request"
 
@@ -217,6 +311,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             {
                 setter_key: setter_expected,
             },
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         delay_id = channel.json_body.get("delay_id")
@@ -230,7 +325,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
             expect_code=HTTPStatus.NOT_FOUND,
         )
@@ -239,17 +334,61 @@ class DelayedEventsTestCase(HomeserverTestCase):
             "POST",
             f"{PATH_PREFIX}/{delay_id}",
             {"action": "send"},
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         self.assertListEqual([], self._get_delayed_events())
         content = self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
         )
         self.assertEqual(setter_expected, content.get(setter_key), content)
 
+    @unittest.override_config({"rc_message": {"per_second": 3.5, "burst_count": 4}})
+    def test_send_delayed_event_ratelimit(self) -> None:
+        delay_ids = []
+        for _ in range(2):
+            channel = self.make_request(
+                "POST",
+                _get_path_for_delayed_send(self.room_id, _EVENT_TYPE, 100000),
+                {},
+                self.user1_access_token,
+            )
+            self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+            delay_id = channel.json_body.get("delay_id")
+            self.assertIsNotNone(delay_id)
+            delay_ids.append(delay_id)
+
+        channel = self.make_request(
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "send"},
+            self.user1_access_token,
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        args = (
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "send"},
+            self.user1_access_token,
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(
+                self.user1_user_id, 0, 0
+            )
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
     def test_restart_delayed_state_event(self) -> None:
         state_key = "to_send_on_restarted_timeout"
 
@@ -261,6 +400,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             {
                 setter_key: setter_expected,
             },
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         delay_id = channel.json_body.get("delay_id")
@@ -274,7 +414,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
             expect_code=HTTPStatus.NOT_FOUND,
         )
@@ -283,6 +423,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
             "POST",
             f"{PATH_PREFIX}/{delay_id}",
             {"action": "restart"},
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
 
@@ -294,7 +435,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
             expect_code=HTTPStatus.NOT_FOUND,
         )
@@ -304,13 +445,100 @@ class DelayedEventsTestCase(HomeserverTestCase):
         content = self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
         )
         self.assertEqual(setter_expected, content.get(setter_key), content)
 
-    def test_delayed_state_events_are_cancelled_by_more_recent_state(self) -> None:
-        state_key = "to_be_cancelled"
+    @unittest.override_config(
+        {"rc_delayed_event_mgmt": {"per_second": 0.5, "burst_count": 1}}
+    )
+    def test_restart_delayed_event_ratelimit(self) -> None:
+        delay_ids = []
+        for _ in range(2):
+            channel = self.make_request(
+                "POST",
+                _get_path_for_delayed_send(self.room_id, _EVENT_TYPE, 100000),
+                {},
+                self.user1_access_token,
+            )
+            self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+            delay_id = channel.json_body.get("delay_id")
+            self.assertIsNotNone(delay_id)
+            delay_ids.append(delay_id)
+
+        channel = self.make_request(
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "restart"},
+            self.user1_access_token,
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+        args = (
+            "POST",
+            f"{PATH_PREFIX}/{delay_ids.pop(0)}",
+            {"action": "restart"},
+            self.user1_access_token,
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(
+                self.user1_user_id, 0, 0
+            )
+        )
+
+        # Test that the request isn't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
+    def test_delayed_state_is_not_cancelled_by_new_state_from_same_user(
+        self,
+    ) -> None:
+        state_key = "to_not_be_cancelled_by_same_user"
+
+        setter_key = "setter"
+        setter_expected = "on_timeout"
+        channel = self.make_request(
+            "PUT",
+            _get_path_for_delayed_state(self.room_id, _EVENT_TYPE, state_key, 900),
+            {
+                setter_key: setter_expected,
+            },
+            self.user1_access_token,
+        )
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+        events = self._get_delayed_events()
+        self.assertEqual(1, len(events), events)
+
+        self.helper.send_state(
+            self.room_id,
+            _EVENT_TYPE,
+            {
+                setter_key: "manual",
+            },
+            self.user1_access_token,
+            state_key=state_key,
+        )
+        events = self._get_delayed_events()
+        self.assertEqual(1, len(events), events)
+
+        self.reactor.advance(1)
+        content = self.helper.get_state(
+            self.room_id,
+            _EVENT_TYPE,
+            self.user1_access_token,
+            state_key=state_key,
+        )
+        self.assertEqual(setter_expected, content.get(setter_key), content)
+
+    def test_delayed_state_is_cancelled_by_new_state_from_other_user(
+        self,
+    ) -> None:
+        state_key = "to_be_cancelled_by_other_user"
 
         setter_key = "setter"
         channel = self.make_request(
@@ -319,19 +547,20 @@ class DelayedEventsTestCase(HomeserverTestCase):
             {
                 setter_key: "on_timeout",
             },
+            self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         events = self._get_delayed_events()
         self.assertEqual(1, len(events), events)
 
-        setter_expected = "manual"
+        setter_expected = "other_user"
         self.helper.send_state(
             self.room_id,
             _EVENT_TYPE,
             {
                 setter_key: setter_expected,
             },
-            None,
+            self.user2_access_token,
             state_key=state_key,
         )
         self.assertListEqual([], self._get_delayed_events())
@@ -340,7 +569,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         content = self.helper.get_state(
             self.room_id,
             _EVENT_TYPE,
-            "",
+            self.user1_access_token,
             state_key=state_key,
         )
         self.assertEqual(setter_expected, content.get(setter_key), content)
@@ -349,6 +578,7 @@ class DelayedEventsTestCase(HomeserverTestCase):
         channel = self.make_request(
             "GET",
             PATH_PREFIX,
+            access_token=self.user1_access_token,
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
 
@@ -374,3 +604,7 @@ def _get_path_for_delayed_state(
     room_id: str, event_type: str, state_key: str, delay_ms: int
 ) -> str:
     return f"rooms/{room_id}/state/{event_type}/{state_key}?org.matrix.msc4140.delay={delay_ms}"
+
+
+def _get_path_for_delayed_send(room_id: str, event_type: str, delay_ms: int) -> str:
+    return f"rooms/{room_id}/send/{event_type}?org.matrix.msc4140.delay={delay_ms}"
diff --git a/tests/rest/client/test_devices.py b/tests/rest/client/test_devices.py
index a3ed12a38f..dd3abdebac 100644
--- a/tests/rest/client/test_devices.py
+++ b/tests/rest/client/test_devices.py
@@ -24,6 +24,7 @@ from twisted.internet.defer import ensureDeferred
 from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.errors import NotFoundError
+from synapse.appservice import ApplicationService
 from synapse.rest import admin, devices, sync
 from synapse.rest.client import keys, login, register
 from synapse.server import HomeServer
@@ -455,3 +456,183 @@ class DehydratedDeviceTestCase(unittest.HomeserverTestCase):
             token,
         )
         self.assertEqual(channel.json_body["device_keys"], {"@mikey:test": {}})
+
+
+class MSC4190AppserviceDevicesTestCase(unittest.HomeserverTestCase):
+    servlets = [
+        register.register_servlets,
+        devices.register_servlets,
+    ]
+
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
+        self.hs = self.setup_test_homeserver()
+
+        # This application service uses the new MSC4190 behaviours
+        self.msc4190_service = ApplicationService(
+            id="msc4190",
+            token="some_token",
+            hs_token="some_token",
+            sender="@as:example.com",
+            namespaces={
+                ApplicationService.NS_USERS: [{"regex": "@.*", "exclusive": False}]
+            },
+            msc4190_device_management=True,
+        )
+        # This application service doesn't use the new MSC4190 behaviours
+        self.pre_msc_service = ApplicationService(
+            id="regular",
+            token="other_token",
+            hs_token="other_token",
+            sender="@as2:example.com",
+            namespaces={
+                ApplicationService.NS_USERS: [{"regex": "@.*", "exclusive": False}]
+            },
+            msc4190_device_management=False,
+        )
+        self.hs.get_datastores().main.services_cache.append(self.msc4190_service)
+        self.hs.get_datastores().main.services_cache.append(self.pre_msc_service)
+        return self.hs
+
+    def test_PUT_device(self) -> None:
+        self.register_appservice_user("alice", self.msc4190_service.token)
+        self.register_appservice_user("bob", self.pre_msc_service.token)
+
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.json_body, {"devices": []})
+
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/v3/devices/AABBCCDD?user_id=@alice:test",
+            content={"display_name": "Alice's device"},
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 201, channel.json_body)
+
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(len(channel.json_body["devices"]), 1)
+        self.assertEqual(channel.json_body["devices"][0]["device_id"], "AABBCCDD")
+
+        # Doing a second time should return a 200 instead of a 201
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/v3/devices/AABBCCDD?user_id=@alice:test",
+            content={"display_name": "Alice's device"},
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+
+        # On the regular service, that API should not allow for the
+        # creation of new devices.
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/v3/devices/AABBCCDD?user_id=@bob:test",
+            content={"display_name": "Bob's device"},
+            access_token=self.pre_msc_service.token,
+        )
+        self.assertEqual(channel.code, 404, channel.json_body)
+
+    def test_DELETE_device(self) -> None:
+        self.register_appservice_user("alice", self.msc4190_service.token)
+
+        # There should be no device
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.json_body, {"devices": []})
+
+        # Create a device
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/v3/devices/AABBCCDD?user_id=@alice:test",
+            content={},
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 201, channel.json_body)
+
+        # There should be one device
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(len(channel.json_body["devices"]), 1)
+
+        # Delete the device. UIA should not be required.
+        channel = self.make_request(
+            "DELETE",
+            "/_matrix/client/v3/devices/AABBCCDD?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+
+        # There should be no device again
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.json_body, {"devices": []})
+
+    def test_POST_delete_devices(self) -> None:
+        self.register_appservice_user("alice", self.msc4190_service.token)
+
+        # There should be no device
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.json_body, {"devices": []})
+
+        # Create a device
+        channel = self.make_request(
+            "PUT",
+            "/_matrix/client/v3/devices/AABBCCDD?user_id=@alice:test",
+            content={},
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 201, channel.json_body)
+
+        # There should be one device
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(len(channel.json_body["devices"]), 1)
+
+        # Delete the device with delete_devices
+        # UIA should not be required.
+        channel = self.make_request(
+            "POST",
+            "/_matrix/client/v3/delete_devices?user_id=@alice:test",
+            content={"devices": ["AABBCCDD"]},
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+
+        # There should be no device again
+        channel = self.make_request(
+            "GET",
+            "/_matrix/client/v3/devices?user_id=@alice:test",
+            access_token=self.msc4190_service.token,
+        )
+        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.json_body, {"devices": []})
diff --git a/tests/rest/client/test_login.py b/tests/rest/client/test_login.py
index cbd6d8d4bf..d7148917d0 100644
--- a/tests/rest/client/test_login.py
+++ b/tests/rest/client/test_login.py
@@ -27,6 +27,7 @@ from typing import (
     Collection,
     Dict,
     List,
+    Literal,
     Optional,
     Tuple,
     Union,
@@ -35,7 +36,6 @@ from unittest.mock import Mock
 from urllib.parse import urlencode
 
 import pymacaroons
-from typing_extensions import Literal
 
 from twisted.test.proto_helpers import MemoryReactor
 from twisted.web.resource import Resource
@@ -43,6 +43,7 @@ from twisted.web.resource import Resource
 import synapse.rest.admin
 from synapse.api.constants import ApprovalNoticeMedium, LoginType
 from synapse.api.errors import Codes
+from synapse.api.urls import LoginSSORedirectURIBuilder
 from synapse.appservice import ApplicationService
 from synapse.http.client import RawHeaders
 from synapse.module_api import ModuleApi
@@ -69,6 +70,10 @@ try:
 except ImportError:
     HAS_JWT = False
 
+import logging
+
+logger = logging.getLogger(__name__)
+
 
 # synapse server name: used to populate public_baseurl in some tests
 SYNAPSE_SERVER_PUBLIC_HOSTNAME = "synapse"
@@ -77,7 +82,7 @@ SYNAPSE_SERVER_PUBLIC_HOSTNAME = "synapse"
 # FakeChannel.isSecure() returns False, so synapse will see the requested uri as
 # http://..., so using http in the public_baseurl stops Synapse trying to redirect to
 # https://....
-BASE_URL = "http://%s/" % (SYNAPSE_SERVER_PUBLIC_HOSTNAME,)
+PUBLIC_BASEURL = "http://%s/" % (SYNAPSE_SERVER_PUBLIC_HOSTNAME,)
 
 # CAS server used in some tests
 CAS_SERVER = "https://fake.test"
@@ -109,6 +114,23 @@ ADDITIONAL_LOGIN_FLOWS = [
 ]
 
 
+def get_relative_uri_from_absolute_uri(absolute_uri: str) -> str:
+    """
+    Peels off the path and query string from an absolute URI. Useful when interacting
+    with `make_request(...)` util function which expects a relative path instead of a
+    full URI.
+    """
+    parsed_uri = urllib.parse.urlparse(absolute_uri)
+    # Sanity check that we're working with an absolute URI
+    assert parsed_uri.scheme == "http" or parsed_uri.scheme == "https"
+
+    relative_uri = parsed_uri.path
+    if parsed_uri.query:
+        relative_uri += "?" + parsed_uri.query
+
+    return relative_uri
+
+
 class TestSpamChecker:
     def __init__(self, config: None, api: ModuleApi):
         api.register_spam_checker_callbacks(
@@ -614,7 +636,7 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
     def default_config(self) -> Dict[str, Any]:
         config = super().default_config()
 
-        config["public_baseurl"] = BASE_URL
+        config["public_baseurl"] = PUBLIC_BASEURL
 
         config["cas_config"] = {
             "enabled": True,
@@ -653,6 +675,9 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
         ]
         return config
 
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.login_sso_redirect_url_builder = LoginSSORedirectURIBuilder(hs.config)
+
     def create_resource_dict(self) -> Dict[str, Resource]:
         d = super().create_resource_dict()
         d.update(build_synapse_client_resource_tree(self.hs))
@@ -725,6 +750,32 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
             + "&idp=cas",
             shorthand=False,
         )
+        self.assertEqual(channel.code, 302, channel.result)
+        location_headers = channel.headers.getRawHeaders("Location")
+        assert location_headers
+        sso_login_redirect_uri = location_headers[0]
+
+        # it should redirect us to the standard login SSO redirect flow
+        self.assertEqual(
+            sso_login_redirect_uri,
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id="cas", client_redirect_url=TEST_CLIENT_REDIRECT_URL
+            ),
+        )
+
+        # follow the redirect
+        channel = self.make_request(
+            "GET",
+            # We have to make this relative to be compatible with `make_request(...)`
+            get_relative_uri_from_absolute_uri(sso_login_redirect_uri),
+            # We have to set the Host header to match the `public_baseurl` to avoid
+            # the extra redirect in the `SsoRedirectServlet` in order for the
+            # cookies to be visible.
+            custom_headers=[
+                ("Host", SYNAPSE_SERVER_PUBLIC_HOSTNAME),
+            ],
+        )
+
         self.assertEqual(channel.code, 302, channel.result)
         location_headers = channel.headers.getRawHeaders("Location")
         assert location_headers
@@ -750,6 +801,32 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
             + urllib.parse.quote_plus(TEST_CLIENT_REDIRECT_URL)
             + "&idp=saml",
         )
+        self.assertEqual(channel.code, 302, channel.result)
+        location_headers = channel.headers.getRawHeaders("Location")
+        assert location_headers
+        sso_login_redirect_uri = location_headers[0]
+
+        # it should redirect us to the standard login SSO redirect flow
+        self.assertEqual(
+            sso_login_redirect_uri,
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id="saml", client_redirect_url=TEST_CLIENT_REDIRECT_URL
+            ),
+        )
+
+        # follow the redirect
+        channel = self.make_request(
+            "GET",
+            # We have to make this relative to be compatible with `make_request(...)`
+            get_relative_uri_from_absolute_uri(sso_login_redirect_uri),
+            # We have to set the Host header to match the `public_baseurl` to avoid
+            # the extra redirect in the `SsoRedirectServlet` in order for the
+            # cookies to be visible.
+            custom_headers=[
+                ("Host", SYNAPSE_SERVER_PUBLIC_HOSTNAME),
+            ],
+        )
+
         self.assertEqual(channel.code, 302, channel.result)
         location_headers = channel.headers.getRawHeaders("Location")
         assert location_headers
@@ -773,13 +850,38 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
             # pick the default OIDC provider
             channel = self.make_request(
                 "GET",
-                "/_synapse/client/pick_idp?redirectUrl="
-                + urllib.parse.quote_plus(TEST_CLIENT_REDIRECT_URL)
-                + "&idp=oidc",
+                f"/_synapse/client/pick_idp?redirectUrl={urllib.parse.quote_plus(TEST_CLIENT_REDIRECT_URL)}&idp=oidc",
             )
         self.assertEqual(channel.code, 302, channel.result)
         location_headers = channel.headers.getRawHeaders("Location")
         assert location_headers
+        sso_login_redirect_uri = location_headers[0]
+
+        # it should redirect us to the standard login SSO redirect flow
+        self.assertEqual(
+            sso_login_redirect_uri,
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id="oidc", client_redirect_url=TEST_CLIENT_REDIRECT_URL
+            ),
+        )
+
+        with fake_oidc_server.patch_homeserver(hs=self.hs):
+            # follow the redirect
+            channel = self.make_request(
+                "GET",
+                # We have to make this relative to be compatible with `make_request(...)`
+                get_relative_uri_from_absolute_uri(sso_login_redirect_uri),
+                # We have to set the Host header to match the `public_baseurl` to avoid
+                # the extra redirect in the `SsoRedirectServlet` in order for the
+                # cookies to be visible.
+                custom_headers=[
+                    ("Host", SYNAPSE_SERVER_PUBLIC_HOSTNAME),
+                ],
+            )
+
+        self.assertEqual(channel.code, 302, channel.result)
+        location_headers = channel.headers.getRawHeaders("Location")
+        assert location_headers
         oidc_uri = location_headers[0]
         oidc_uri_path, oidc_uri_query = oidc_uri.split("?", 1)
 
@@ -838,12 +940,38 @@ class MultiSSOTestCase(unittest.HomeserverTestCase):
         self.assertEqual(chan.json_body["user_id"], "@user1:test")
 
     def test_multi_sso_redirect_to_unknown(self) -> None:
-        """An unknown IdP should cause a 400"""
+        """An unknown IdP should cause a 404"""
         channel = self.make_request(
             "GET",
             "/_synapse/client/pick_idp?redirectUrl=http://x&idp=xyz",
         )
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, 302, channel.result)
+        location_headers = channel.headers.getRawHeaders("Location")
+        assert location_headers
+        sso_login_redirect_uri = location_headers[0]
+
+        # it should redirect us to the standard login SSO redirect flow
+        self.assertEqual(
+            sso_login_redirect_uri,
+            self.login_sso_redirect_url_builder.build_login_sso_redirect_uri(
+                idp_id="xyz", client_redirect_url="http://x"
+            ),
+        )
+
+        # follow the redirect
+        channel = self.make_request(
+            "GET",
+            # We have to make this relative to be compatible with `make_request(...)`
+            get_relative_uri_from_absolute_uri(sso_login_redirect_uri),
+            # We have to set the Host header to match the `public_baseurl` to avoid
+            # the extra redirect in the `SsoRedirectServlet` in order for the
+            # cookies to be visible.
+            custom_headers=[
+                ("Host", SYNAPSE_SERVER_PUBLIC_HOSTNAME),
+            ],
+        )
+
+        self.assertEqual(channel.code, 404, channel.result)
 
     def test_client_idp_redirect_to_unknown(self) -> None:
         """If the client tries to pick an unknown IdP, return a 404"""
@@ -1473,7 +1601,7 @@ class UsernamePickerTestCase(HomeserverTestCase):
 
     def default_config(self) -> Dict[str, Any]:
         config = super().default_config()
-        config["public_baseurl"] = BASE_URL
+        config["public_baseurl"] = PUBLIC_BASEURL
 
         config["oidc_config"] = {}
         config["oidc_config"].update(TEST_OIDC_CONFIG)
diff --git a/tests/rest/client/test_media.py b/tests/rest/client/test_media.py
index 4060525efe..0e3e370ee8 100644
--- a/tests/rest/client/test_media.py
+++ b/tests/rest/client/test_media.py
@@ -24,14 +24,13 @@ import json
 import os
 import re
 import shutil
-from typing import Any, BinaryIO, Dict, List, Optional, Sequence, Tuple, Type
+from typing import Any, BinaryIO, ClassVar, Dict, List, Optional, Sequence, Tuple, Type
 from unittest.mock import MagicMock, Mock, patch
 from urllib import parse
 from urllib.parse import quote, urlencode
 
 from parameterized import parameterized, parameterized_class
 from PIL import Image as Image
-from typing_extensions import ClassVar
 
 from twisted.internet import defer
 from twisted.internet._resolver import HostResolution
@@ -2677,3 +2676,113 @@ class AuthenticatedMediaTestCase(unittest.HomeserverTestCase):
             access_token=self.tok,
         )
         self.assertEqual(channel10.code, 200)
+
+    def test_authenticated_media_etag(self) -> None:
+        """Test that ETag works correctly with authenticated media over client
+        APIs"""
+
+        # upload some local media with authentication on
+        channel = self.make_request(
+            "POST",
+            "_matrix/media/v3/upload?filename=test_png_upload",
+            SMALL_PNG,
+            self.tok,
+            shorthand=False,
+            content_type=b"image/png",
+            custom_headers=[("Content-Length", str(67))],
+        )
+        self.assertEqual(channel.code, 200)
+        res = channel.json_body.get("content_uri")
+        assert res is not None
+        uri = res.split("mxc://")[1]
+
+        # Check standard media endpoint
+        self._check_caching(f"/download/{uri}")
+
+        # check thumbnails as well
+        params = "?width=32&height=32&method=crop"
+        self._check_caching(f"/thumbnail/{uri}{params}")
+
+        # Inject a piece of remote media.
+        file_id = "abcdefg12345"
+        file_info = FileInfo(server_name="lonelyIsland", file_id=file_id)
+
+        media_storage = self.hs.get_media_repository().media_storage
+
+        ctx = media_storage.store_into_file(file_info)
+        (f, fname) = self.get_success(ctx.__aenter__())
+        f.write(SMALL_PNG)
+        self.get_success(ctx.__aexit__(None, None, None))
+
+        # we write the authenticated status when storing media, so this should pick up
+        # config and authenticate the media
+        self.get_success(
+            self.store.store_cached_remote_media(
+                origin="lonelyIsland",
+                media_id="52",
+                media_type="image/png",
+                media_length=1,
+                time_now_ms=self.clock.time_msec(),
+                upload_name="remote_test.png",
+                filesystem_id=file_id,
+            )
+        )
+
+        # ensure we have thumbnails for the non-dynamic code path
+        if self.extra_config == {"dynamic_thumbnails": False}:
+            self.get_success(
+                self.repo._generate_thumbnails(
+                    "lonelyIsland", "52", file_id, "image/png"
+                )
+            )
+
+        self._check_caching("/download/lonelyIsland/52")
+
+        params = "?width=32&height=32&method=crop"
+        self._check_caching(f"/thumbnail/lonelyIsland/52{params}")
+
+    def _check_caching(self, path: str) -> None:
+        """
+        Checks that:
+          1. fetching the path returns an ETag header
+          2. refetching with the ETag returns a 304 without a body
+          3. refetching with the ETag but through unauthenticated endpoint
+             returns 404
+        """
+
+        # Request media over authenticated endpoint, should be found
+        channel1 = self.make_request(
+            "GET",
+            f"/_matrix/client/v1/media{path}",
+            access_token=self.tok,
+            shorthand=False,
+        )
+        self.assertEqual(channel1.code, 200)
+
+        # Should have a single ETag field
+        etags = channel1.headers.getRawHeaders("ETag")
+        self.assertIsNotNone(etags)
+        assert etags is not None  # For mypy
+        self.assertEqual(len(etags), 1)
+        etag = etags[0]
+
+        # Refetching with the etag should result in 304 and empty body.
+        channel2 = self.make_request(
+            "GET",
+            f"/_matrix/client/v1/media{path}",
+            access_token=self.tok,
+            shorthand=False,
+            custom_headers=[("If-None-Match", etag)],
+        )
+        self.assertEqual(channel2.code, 304)
+        self.assertEqual(channel2.is_finished(), True)
+        self.assertNotIn("body", channel2.result)
+
+        # Refetching with the etag but no access token should result in 404.
+        channel3 = self.make_request(
+            "GET",
+            f"/_matrix/media/r0{path}",
+            shorthand=False,
+            custom_headers=[("If-None-Match", etag)],
+        )
+        self.assertEqual(channel3.code, 404)
diff --git a/tests/rest/client/test_models.py b/tests/rest/client/test_models.py
index f14585ccac..75479e6235 100644
--- a/tests/rest/client/test_models.py
+++ b/tests/rest/client/test_models.py
@@ -19,8 +19,7 @@
 #
 #
 import unittest as stdlib_unittest
-
-from typing_extensions import Literal
+from typing import Literal
 
 from synapse._pydantic_compat import BaseModel, ValidationError
 from synapse.types.rest.client import EmailRequestTokenBody
diff --git a/tests/rest/client/test_presence.py b/tests/rest/client/test_presence.py
index 5ced8319e1..6b9c70974a 100644
--- a/tests/rest/client/test_presence.py
+++ b/tests/rest/client/test_presence.py
@@ -29,6 +29,7 @@ from synapse.types import UserID
 from synapse.util import Clock
 
 from tests import unittest
+from tests.unittest import override_config
 
 
 class PresenceTestCase(unittest.HomeserverTestCase):
@@ -95,3 +96,54 @@ class PresenceTestCase(unittest.HomeserverTestCase):
 
         self.assertEqual(channel.code, HTTPStatus.OK)
         self.assertEqual(self.presence_handler.set_state.call_count, 0)
+
+    @override_config(
+        {"rc_presence": {"per_user": {"per_second": 0.1, "burst_count": 1}}}
+    )
+    def test_put_presence_over_ratelimit(self) -> None:
+        """
+        Multiple PUTs to the status endpoint without sufficient delay will be rate limited.
+        """
+        self.hs.config.server.presence_enabled = True
+
+        body = {"presence": "here", "status_msg": "beep boop"}
+        channel = self.make_request(
+            "PUT", "/presence/%s/status" % (self.user_id,), body
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+
+        body = {"presence": "here", "status_msg": "beep boop"}
+        channel = self.make_request(
+            "PUT", "/presence/%s/status" % (self.user_id,), body
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.TOO_MANY_REQUESTS)
+        self.assertEqual(self.presence_handler.set_state.call_count, 1)
+
+    @override_config(
+        {"rc_presence": {"per_user": {"per_second": 0.1, "burst_count": 1}}}
+    )
+    def test_put_presence_within_ratelimit(self) -> None:
+        """
+        Multiple PUTs to the status endpoint with sufficient delay should all call set_state.
+        """
+        self.hs.config.server.presence_enabled = True
+
+        body = {"presence": "here", "status_msg": "beep boop"}
+        channel = self.make_request(
+            "PUT", "/presence/%s/status" % (self.user_id,), body
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+
+        # Advance time a sufficient amount to avoid rate limiting.
+        self.reactor.advance(30)
+
+        body = {"presence": "here", "status_msg": "beep boop"}
+        channel = self.make_request(
+            "PUT", "/presence/%s/status" % (self.user_id,), body
+        )
+
+        self.assertEqual(channel.code, HTTPStatus.OK)
+        self.assertEqual(self.presence_handler.set_state.call_count, 2)
diff --git a/tests/rest/client/test_profile.py b/tests/rest/client/test_profile.py
index a92713d220..708402b792 100644
--- a/tests/rest/client/test_profile.py
+++ b/tests/rest/client/test_profile.py
@@ -25,16 +25,20 @@ import urllib.parse
 from http import HTTPStatus
 from typing import Any, Dict, Optional
 
+from canonicaljson import encode_canonical_json
+
 from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.errors import Codes
 from synapse.rest import admin
 from synapse.rest.client import login, profile, room
 from synapse.server import HomeServer
+from synapse.storage.databases.main.profile import MAX_PROFILE_SIZE
 from synapse.types import UserID
 from synapse.util import Clock
 
 from tests import unittest
+from tests.utils import USE_POSTGRES_FOR_TESTS
 
 
 class ProfileTestCase(unittest.HomeserverTestCase):
@@ -480,6 +484,298 @@ class ProfileTestCase(unittest.HomeserverTestCase):
             # The client requested ?propagate=true, so it should have happened.
             self.assertEqual(channel.json_body.get(prop), "http://my.server/pic.gif")
 
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_get_missing_custom_field(self) -> None:
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+        )
+        self.assertEqual(channel.code, HTTPStatus.NOT_FOUND, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.NOT_FOUND)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_get_missing_custom_field_invalid_field_name(self) -> None:
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/[custom_field]",
+        )
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.INVALID_PARAM)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_get_custom_field_rejects_bad_username(self) -> None:
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{urllib.parse.quote('@alice:')}/custom_field",
+        )
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.INVALID_PARAM)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field(self) -> None:
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+            content={"custom_field": "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+        )
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
+        self.assertEqual(channel.json_body, {"custom_field": "test"})
+
+        # Overwriting the field should work.
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+            content={"custom_field": "new_Value"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+        )
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
+        self.assertEqual(channel.json_body, {"custom_field": "new_Value"})
+
+        # Deleting the field should work.
+        channel = self.make_request(
+            "DELETE",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+            content={},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+        )
+        self.assertEqual(channel.code, HTTPStatus.NOT_FOUND, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.NOT_FOUND)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_non_string(self) -> None:
+        """Non-string fields are supported for custom fields."""
+        fields = {
+            "bool_field": True,
+            "array_field": ["test"],
+            "object_field": {"test": "test"},
+            "numeric_field": 1,
+            "null_field": None,
+        }
+
+        for key, value in fields.items():
+            channel = self.make_request(
+                "PUT",
+                f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+                content={key: value},
+                access_token=self.owner_tok,
+            )
+            self.assertEqual(channel.code, 200, channel.result)
+
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/v3/profile/{self.owner}",
+        )
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
+        self.assertEqual(channel.json_body, {"displayname": "owner", **fields})
+
+        # Check getting individual fields works.
+        for key, value in fields.items():
+            channel = self.make_request(
+                "GET",
+                f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            )
+            self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
+            self.assertEqual(channel.json_body, {key: value})
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field_noauth(self) -> None:
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+            content={"custom_field": "test"},
+        )
+        self.assertEqual(channel.code, 401, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.MISSING_TOKEN)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field_size(self) -> None:
+        """
+        Attempts to set a custom field name that is too long should get a 400 error.
+        """
+        # Key is missing.
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/",
+            content={"": "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.INVALID_PARAM)
+
+        # Single key is too large.
+        key = "c" * 500
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            content={key: "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.KEY_TOO_LARGE)
+
+        channel = self.make_request(
+            "DELETE",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            content={key: "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.KEY_TOO_LARGE)
+
+        # Key doesn't match body.
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/custom_field",
+            content={"diff_key": "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.MISSING_PARAM)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field_profile_too_long(self) -> None:
+        """
+        Attempts to set a custom field that would push the overall profile too large.
+        """
+        # Get right to the boundary:
+        #   len("displayname") + len("owner") + 5 = 21 for the displayname
+        #   1 + 65498 + 5 for key "a" = 65504
+        #   2 braces, 1 comma
+        # 3 + 21 + 65498 = 65522 < 65536.
+        key = "a"
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            content={key: "a" * 65498},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        # Get the entire profile.
+        channel = self.make_request(
+            "GET",
+            f"/_matrix/client/v3/profile/{self.owner}",
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+        canonical_json = encode_canonical_json(channel.json_body)
+        # 6 is the minimum bytes to store a value: 4 quotes, 1 colon, 1 comma, an empty key.
+        # Be one below that so we can prove we're at the boundary.
+        self.assertEqual(len(canonical_json), MAX_PROFILE_SIZE - 8)
+
+        # Postgres stores JSONB with whitespace, while SQLite doesn't.
+        if USE_POSTGRES_FOR_TESTS:
+            ADDITIONAL_CHARS = 0
+        else:
+            ADDITIONAL_CHARS = 1
+
+        # The next one should fail, note the value has a (JSON) length of 2.
+        key = "b"
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            content={key: "1" + "a" * ADDITIONAL_CHARS},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.PROFILE_TOO_LARGE)
+
+        # Setting an avatar or (longer) display name should not work.
+        channel = self.make_request(
+            "PUT",
+            f"/profile/{self.owner}/displayname",
+            content={"displayname": "owner12345678" + "a" * ADDITIONAL_CHARS},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.PROFILE_TOO_LARGE)
+
+        channel = self.make_request(
+            "PUT",
+            f"/profile/{self.owner}/avatar_url",
+            content={"avatar_url": "mxc://foo/bar"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.PROFILE_TOO_LARGE)
+
+        # Removing a single byte should work.
+        key = "b"
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            content={key: "" + "a" * ADDITIONAL_CHARS},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        # Finally, setting a field that already exists to a value that is <= in length should work.
+        key = "a"
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/{key}",
+            content={key: ""},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field_displayname(self) -> None:
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/displayname",
+            content={"displayname": "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        displayname = self._get_displayname()
+        self.assertEqual(displayname, "test")
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field_avatar_url(self) -> None:
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.owner}/avatar_url",
+            content={"avatar_url": "mxc://test/good"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 200, channel.result)
+
+        avatar_url = self._get_avatar_url()
+        self.assertEqual(avatar_url, "mxc://test/good")
+
+    @unittest.override_config({"experimental_features": {"msc4133_enabled": True}})
+    def test_set_custom_field_other(self) -> None:
+        """Setting someone else's profile field should fail"""
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/unstable/uk.tcpip.msc4133/profile/{self.other}/custom_field",
+            content={"custom_field": "test"},
+            access_token=self.owner_tok,
+        )
+        self.assertEqual(channel.code, 403, channel.result)
+        self.assertEqual(channel.json_body["errcode"], Codes.FORBIDDEN)
+
     def _setup_local_files(self, names_and_props: Dict[str, Dict[str, Any]]) -> None:
         """Stores metadata about files in the database.
 
diff --git a/tests/rest/client/test_register.py b/tests/rest/client/test_register.py
index c091f403cc..b697bf6f67 100644
--- a/tests/rest/client/test_register.py
+++ b/tests/rest/client/test_register.py
@@ -120,6 +120,34 @@ class RegisterRestServletTestCase(unittest.HomeserverTestCase):
 
         self.assertEqual(channel.code, 401, msg=channel.result)
 
+    def test_POST_appservice_msc4190_enabled(self) -> None:
+        # With MSC4190 enabled, the registration should *not* return an access token
+        user_id = "@as_user_kermit:test"
+        as_token = "i_am_an_app_service"
+
+        appservice = ApplicationService(
+            as_token,
+            id="1234",
+            namespaces={"users": [{"regex": r"@as_user.*", "exclusive": True}]},
+            sender="@as:test",
+            msc4190_device_management=True,
+        )
+
+        self.hs.get_datastores().main.services_cache.append(appservice)
+        request_data = {
+            "username": "as_user_kermit",
+            "type": APP_SERVICE_REGISTRATION_TYPE,
+        }
+
+        channel = self.make_request(
+            b"POST", self.url + b"?access_token=i_am_an_app_service", request_data
+        )
+
+        self.assertEqual(channel.code, 200, msg=channel.result)
+        det_data = {"user_id": user_id, "home_server": self.hs.hostname}
+        self.assertLessEqual(det_data.items(), channel.json_body.items())
+        self.assertNotIn("access_token", channel.json_body)
+
     def test_POST_bad_password(self) -> None:
         request_data = {"username": "kermit", "password": 666}
         channel = self.make_request(b"POST", self.url, request_data)
diff --git a/tests/rest/client/test_rendezvous.py b/tests/rest/client/test_rendezvous.py
index ab701680a6..83a5cbdc15 100644
--- a/tests/rest/client/test_rendezvous.py
+++ b/tests/rest/client/test_rendezvous.py
@@ -117,10 +117,11 @@ class RendezvousServletTestCase(unittest.HomeserverTestCase):
         headers = dict(channel.headers.getAllRawHeaders())
         self.assertIn(b"ETag", headers)
         self.assertIn(b"Expires", headers)
+        self.assertIn(b"Content-Length", headers)
         self.assertEqual(headers[b"Content-Type"], [b"application/json"])
         self.assertEqual(headers[b"Access-Control-Allow-Origin"], [b"*"])
         self.assertEqual(headers[b"Access-Control-Expose-Headers"], [b"etag"])
-        self.assertEqual(headers[b"Cache-Control"], [b"no-store"])
+        self.assertEqual(headers[b"Cache-Control"], [b"no-store, no-transform"])
         self.assertEqual(headers[b"Pragma"], [b"no-cache"])
         self.assertIn("url", channel.json_body)
         self.assertTrue(channel.json_body["url"].startswith("https://"))
@@ -141,9 +142,10 @@ class RendezvousServletTestCase(unittest.HomeserverTestCase):
         self.assertEqual(headers[b"ETag"], [etag])
         self.assertIn(b"Expires", headers)
         self.assertEqual(headers[b"Content-Type"], [b"text/plain"])
+        self.assertEqual(headers[b"Content-Length"], [b"7"])
         self.assertEqual(headers[b"Access-Control-Allow-Origin"], [b"*"])
         self.assertEqual(headers[b"Access-Control-Expose-Headers"], [b"etag"])
-        self.assertEqual(headers[b"Cache-Control"], [b"no-store"])
+        self.assertEqual(headers[b"Cache-Control"], [b"no-store, no-transform"])
         self.assertEqual(headers[b"Pragma"], [b"no-cache"])
         self.assertEqual(channel.text_body, "foo=bar")
 
diff --git a/tests/rest/client/test_rooms.py b/tests/rest/client/test_rooms.py
index 07600418ed..6c93ead3b8 100644
--- a/tests/rest/client/test_rooms.py
+++ b/tests/rest/client/test_rooms.py
@@ -25,12 +25,11 @@
 
 import json
 from http import HTTPStatus
-from typing import Any, Dict, Iterable, List, Optional, Tuple, Union
+from typing import Any, Dict, Iterable, List, Literal, Optional, Tuple, Union
 from unittest.mock import AsyncMock, Mock, call, patch
 from urllib import parse as urlparse
 
 from parameterized import param, parameterized
-from typing_extensions import Literal
 
 from twisted.test.proto_helpers import MemoryReactor
 
@@ -68,6 +67,7 @@ from tests.http.server._base import make_request_with_cancellation_test
 from tests.storage.test_stream import PaginationTestCase
 from tests.test_utils.event_injection import create_event
 from tests.unittest import override_config
+from tests.utils import default_config
 
 PATH_PREFIX = b"/_matrix/client/api/v1"
 
@@ -742,7 +742,7 @@ class RoomsCreateTestCase(RoomBase):
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         self.assertTrue("room_id" in channel.json_body)
         assert channel.resource_usage is not None
-        self.assertEqual(33, channel.resource_usage.db_txn_count)
+        self.assertEqual(35, channel.resource_usage.db_txn_count)
 
     def test_post_room_initial_state(self) -> None:
         # POST with initial_state config key, expect new room id
@@ -755,7 +755,7 @@ class RoomsCreateTestCase(RoomBase):
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
         self.assertTrue("room_id" in channel.json_body)
         assert channel.resource_usage is not None
-        self.assertEqual(35, channel.resource_usage.db_txn_count)
+        self.assertEqual(37, channel.resource_usage.db_txn_count)
 
     def test_post_room_visibility_key(self) -> None:
         # POST with visibility config key, expect new room id
@@ -1337,17 +1337,13 @@ class RoomJoinTestCase(RoomBase):
             "POST", f"/join/{self.room1}", access_token=self.tok2
         )
         self.assertEqual(channel.code, 403)
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
-        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
 
         channel = self.make_request(
             "POST", f"/rooms/{self.room1}/join", access_token=self.tok2
         )
         self.assertEqual(channel.code, 403)
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
-        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
 
     def test_suspended_user_cannot_knock_on_room(self) -> None:
         # set the user as suspended
@@ -1361,9 +1357,7 @@ class RoomJoinTestCase(RoomBase):
             shorthand=False,
         )
         self.assertEqual(channel.code, 403)
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
-        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
 
     def test_suspended_user_cannot_invite_to_room(self) -> None:
         # set the user as suspended
@@ -1376,9 +1370,24 @@ class RoomJoinTestCase(RoomBase):
             access_token=self.tok1,
             content={"user_id": self.user2},
         )
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
+    def test_suspended_user_can_leave_room(self) -> None:
+        channel = self.make_request(
+            "POST", f"/join/{self.room1}", access_token=self.tok1
         )
+        self.assertEqual(channel.code, 200)
+
+        # set the user as suspended
+        self.get_success(self.store.set_user_suspended_status(self.user1, True))
+
+        # leave room
+        channel = self.make_request(
+            "POST",
+            f"/rooms/{self.room1}/leave",
+            access_token=self.tok1,
+        )
+        self.assertEqual(channel.code, 200)
 
 
 class RoomAppserviceTsParamTestCase(unittest.HomeserverTestCase):
@@ -2390,6 +2399,41 @@ class RoomDelayedEventTestCase(RoomBase):
         )
         self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
 
+    @unittest.override_config(
+        {
+            "max_event_delay_duration": "24h",
+            "rc_message": {"per_second": 1, "burst_count": 2},
+        }
+    )
+    def test_add_delayed_event_ratelimit(self) -> None:
+        """Test that requests to schedule new delayed events are ratelimited by a RateLimiter,
+        which ratelimits them correctly, including by not limiting when the requester is
+        exempt from ratelimiting.
+        """
+
+        # Test that new delayed events are correctly ratelimited.
+        args = (
+            "POST",
+            (
+                "rooms/%s/send/m.room.message?org.matrix.msc4140.delay=2000"
+                % self.room_id
+            ).encode("ascii"),
+            {"body": "test", "msgtype": "m.text"},
+        )
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.TOO_MANY_REQUESTS, channel.code, channel.result)
+
+        # Add the current user to the ratelimit overrides, allowing them no ratelimiting.
+        self.get_success(
+            self.hs.get_datastores().main.set_ratelimit_for_user(self.user_id, 0, 0)
+        )
+
+        # Test that the new delayed events aren't ratelimited anymore.
+        channel = self.make_request(*args)
+        self.assertEqual(HTTPStatus.OK, channel.code, channel.result)
+
 
 class RoomSearchTestCase(unittest.HomeserverTestCase):
     servlets = [
@@ -2557,6 +2601,11 @@ class PublicRoomsRoomTypeFilterTestCase(unittest.HomeserverTestCase):
             tok=self.token,
         )
 
+    def default_config(self) -> JsonDict:
+        config = default_config("test")
+        config["room_list_publication_rules"] = [{"action": "allow"}]
+        return config
+
     def make_public_rooms_request(
         self,
         room_types: Optional[List[Union[str, None]]],
@@ -3998,10 +4047,25 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
         self.user2 = self.register_user("teresa", "hackme")
         self.tok2 = self.login("teresa", "hackme")
 
-        self.room1 = self.helper.create_room_as(room_creator=self.user1, tok=self.tok1)
+        self.admin = self.register_user("admin", "pass", True)
+        self.admin_tok = self.login("admin", "pass")
+
+        self.room1 = self.helper.create_room_as(
+            room_creator=self.user1, tok=self.tok1, room_version="11"
+        )
         self.store = hs.get_datastores().main
 
-    def test_suspended_user_cannot_send_message_to_room(self) -> None:
+        self.room2 = self.helper.create_room_as(
+            room_creator=self.user1, is_public=False, tok=self.tok1
+        )
+        self.helper.send_state(
+            self.room2,
+            EventTypes.RoomEncryption,
+            {EventContentFields.ENCRYPTION_ALGORITHM: "m.megolm.v1.aes-sha2"},
+            tok=self.tok1,
+        )
+
+    def test_suspended_user_cannot_send_message_to_public_room(self) -> None:
         # set the user as suspended
         self.get_success(self.store.set_user_suspended_status(self.user1, True))
 
@@ -4011,9 +4075,25 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
             access_token=self.tok1,
             content={"body": "hello", "msgtype": "m.text"},
         )
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
+    def test_suspended_user_cannot_send_message_to_encrypted_room(self) -> None:
+        channel = self.make_request(
+            "PUT",
+            f"/_synapse/admin/v1/suspend/{self.user1}",
+            {"suspend": True},
+            access_token=self.admin_tok,
         )
+        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.json_body, {f"user_{self.user1}_suspended": True})
+
+        channel = self.make_request(
+            "PUT",
+            f"/rooms/{self.room2}/send/m.room.encrypted/1",
+            access_token=self.tok1,
+            content={},
+        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
 
     def test_suspended_user_cannot_change_profile_data(self) -> None:
         # set the user as suspended
@@ -4026,9 +4106,7 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
             content={"avatar_url": "mxc://matrix.org/wefh34uihSDRGhw34"},
             shorthand=False,
         )
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
-        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
 
         channel2 = self.make_request(
             "PUT",
@@ -4037,9 +4115,7 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
             content={"displayname": "something offensive"},
             shorthand=False,
         )
-        self.assertEqual(
-            channel2.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
-        )
+        self.assertEqual(channel2.json_body["errcode"], "M_USER_SUSPENDED")
 
     def test_suspended_user_cannot_redact_messages_other_than_their_own(self) -> None:
         # first user sends message
@@ -4073,9 +4149,7 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
             content={"reason": "bogus"},
             shorthand=False,
         )
-        self.assertEqual(
-            channel.json_body["errcode"], "ORG.MATRIX.MSC3823.USER_ACCOUNT_SUSPENDED"
-        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
 
         # but can redact their own
         channel = self.make_request(
@@ -4086,3 +4160,244 @@ class UserSuspensionTests(unittest.HomeserverTestCase):
             shorthand=False,
         )
         self.assertEqual(channel.code, 200)
+
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/v3/rooms/{self.room1}/send/m.room.redaction/3456346",
+            access_token=self.tok1,
+            content={"reason": "bogus", "redacts": event_id},
+            shorthand=False,
+        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
+        channel = self.make_request(
+            "PUT",
+            f"/_matrix/client/v3/rooms/{self.room1}/send/m.room.redaction/3456346",
+            access_token=self.tok1,
+            content={"reason": "bogus", "redacts": event_id2},
+            shorthand=False,
+        )
+        self.assertEqual(channel.code, 200)
+
+    def test_suspended_user_cannot_ban_others(self) -> None:
+        # user to ban joins room user1 created
+        self.make_request("POST", f"/rooms/{self.room1}/join", access_token=self.tok2)
+
+        # suspend user1
+        self.get_success(self.store.set_user_suspended_status(self.user1, True))
+
+        # user1 tries to ban other user while suspended
+        channel = self.make_request(
+            "POST",
+            f"/_matrix/client/v3/rooms/{self.room1}/ban",
+            access_token=self.tok1,
+            content={"reason": "spite", "user_id": self.user2},
+            shorthand=False,
+        )
+        self.assertEqual(channel.json_body["errcode"], "M_USER_SUSPENDED")
+
+        # un-suspend user1
+        self.get_success(self.store.set_user_suspended_status(self.user1, False))
+
+        # ban now goes through
+        channel = self.make_request(
+            "POST",
+            f"/_matrix/client/v3/rooms/{self.room1}/ban",
+            access_token=self.tok1,
+            content={"reason": "spite", "user_id": self.user2},
+            shorthand=False,
+        )
+        self.assertEqual(channel.code, 200)
+
+
+class RoomParticipantTestCase(unittest.HomeserverTestCase):
+    servlets = [
+        login.register_servlets,
+        room.register_servlets,
+        profile.register_servlets,
+        admin.register_servlets,
+    ]
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.user1 = self.register_user("thomas", "hackme")
+        self.tok1 = self.login("thomas", "hackme")
+
+        self.user2 = self.register_user("teresa", "hackme")
+        self.tok2 = self.login("teresa", "hackme")
+
+        self.room1 = self.helper.create_room_as(
+            room_creator=self.user1,
+            tok=self.tok1,
+            # Allow user2 to send state events into the room.
+            extra_content={
+                "power_level_content_override": {
+                    "state_default": 0,
+                },
+            },
+        )
+        self.store = hs.get_datastores().main
+
+    @parameterized.expand(
+        [
+            # Should record participation.
+            param(
+                is_state=False,
+                event_type="m.room.message",
+                event_content={
+                    "msgtype": "m.text",
+                    "body": "I am engaging in this room",
+                },
+                record_participation=True,
+            ),
+            param(
+                is_state=False,
+                event_type="m.room.encrypted",
+                event_content={
+                    "algorithm": "m.megolm.v1.aes-sha2",
+                    "ciphertext": "AwgAEnACgAkLmt6qF84IK++J7UDH2Za1YVchHyprqTqsg...",
+                    "device_id": "RJYKSTBOIE",
+                    "sender_key": "IlRMeOPX2e0MurIyfWEucYBRVOEEUMrOHqn/8mLqMjA",
+                    "session_id": "X3lUlvLELLYxeTx4yOVu6UDpasGEVO0Jbu+QFnm0cKQ",
+                },
+                record_participation=True,
+            ),
+            # Should not record participation.
+            param(
+                is_state=False,
+                event_type="m.sticker",
+                event_content={
+                    "body": "My great sticker",
+                    "info": {},
+                    "url": "mxc://unused/mxcurl",
+                },
+                record_participation=False,
+            ),
+            # An invalid **state event** with type `m.room.message`
+            param(
+                is_state=True,
+                event_type="m.room.message",
+                event_content={
+                    "msgtype": "m.text",
+                    "body": "I am engaging in this room",
+                },
+                record_participation=False,
+            ),
+            # An invalid **state event** with type `m.room.encrypted`
+            # Note: this may become valid in the future with encrypted state, though we
+            # still may not want to consider it grounds for marking a user as participating.
+            param(
+                is_state=True,
+                event_type="m.room.encrypted",
+                event_content={
+                    "algorithm": "m.megolm.v1.aes-sha2",
+                    "ciphertext": "AwgAEnACgAkLmt6qF84IK++J7UDH2Za1YVchHyprqTqsg...",
+                    "device_id": "RJYKSTBOIE",
+                    "sender_key": "IlRMeOPX2e0MurIyfWEucYBRVOEEUMrOHqn/8mLqMjA",
+                    "session_id": "X3lUlvLELLYxeTx4yOVu6UDpasGEVO0Jbu+QFnm0cKQ",
+                },
+                record_participation=False,
+            ),
+        ]
+    )
+    def test_sending_message_records_participation(
+        self,
+        is_state: bool,
+        event_type: str,
+        event_content: JsonDict,
+        record_participation: bool,
+    ) -> None:
+        """
+        Test that sending an various events into a room causes the user to
+        appropriately marked or not marked as a participant in that room.
+        """
+        self.helper.join(self.room1, self.user2, tok=self.tok2)
+
+        # user has not sent any messages, so should not be a participant
+        participant = self.get_success(
+            self.store.get_room_participation(self.user2, self.room1)
+        )
+        self.assertFalse(participant)
+
+        # send an event into the room
+        if is_state:
+            # send a state event
+            self.helper.send_state(
+                self.room1,
+                event_type,
+                body=event_content,
+                tok=self.tok2,
+            )
+        else:
+            # send a non-state event
+            self.helper.send_event(
+                self.room1,
+                event_type,
+                content=event_content,
+                tok=self.tok2,
+            )
+
+        # check whether the user has been marked as a participant
+        participant = self.get_success(
+            self.store.get_room_participation(self.user2, self.room1)
+        )
+        self.assertEqual(participant, record_participation)
+
+    @parameterized.expand(
+        [
+            param(
+                event_type="m.room.message",
+                event_content={
+                    "msgtype": "m.text",
+                    "body": "I am engaging in this room",
+                },
+            ),
+            param(
+                event_type="m.room.encrypted",
+                event_content={
+                    "algorithm": "m.megolm.v1.aes-sha2",
+                    "ciphertext": "AwgAEnACgAkLmt6qF84IK++J7UDH2Za1YVchHyprqTqsg...",
+                    "device_id": "RJYKSTBOIE",
+                    "sender_key": "IlRMeOPX2e0MurIyfWEucYBRVOEEUMrOHqn/8mLqMjA",
+                    "session_id": "X3lUlvLELLYxeTx4yOVu6UDpasGEVO0Jbu+QFnm0cKQ",
+                },
+            ),
+        ]
+    )
+    def test_sending_event_and_leaving_does_not_record_participation(
+        self,
+        event_type: str,
+        event_content: JsonDict,
+    ) -> None:
+        """
+        Test that sending an event into a room that should mark a user as a
+        participant, but then leaving the room, results in the user no longer
+        be marked as a participant in that room.
+        """
+        self.helper.join(self.room1, self.user2, tok=self.tok2)
+
+        # user has not sent any messages, so should not be a participant
+        participant = self.get_success(
+            self.store.get_room_participation(self.user2, self.room1)
+        )
+        self.assertFalse(participant)
+
+        # sending a message should now mark user as participant
+        self.helper.send_event(
+            self.room1,
+            event_type,
+            content=event_content,
+            tok=self.tok2,
+        )
+        participant = self.get_success(
+            self.store.get_room_participation(self.user2, self.room1)
+        )
+        self.assertTrue(participant)
+
+        # leave the room
+        self.helper.leave(self.room1, self.user2, tok=self.tok2)
+
+        # user should no longer be considered a participant
+        participant = self.get_success(
+            self.store.get_room_participation(self.user2, self.room1)
+        )
+        self.assertFalse(participant)
diff --git a/tests/rest/client/utils.py b/tests/rest/client/utils.py
index a1c284726a..53f1782d59 100644
--- a/tests/rest/client/utils.py
+++ b/tests/rest/client/utils.py
@@ -31,6 +31,7 @@ from typing import (
     AnyStr,
     Dict,
     Iterable,
+    Literal,
     Mapping,
     MutableMapping,
     Optional,
@@ -40,7 +41,6 @@ from typing import (
 from urllib.parse import urlencode
 
 import attr
-from typing_extensions import Literal
 
 from twisted.test.proto_helpers import MemoryReactorClock
 from twisted.web.server import Site
@@ -548,7 +548,7 @@ class RestHelper:
         room_id: str,
         event_type: str,
         body: Dict[str, Any],
-        tok: Optional[str],
+        tok: Optional[str] = None,
         expect_code: int = HTTPStatus.OK,
         state_key: str = "",
     ) -> JsonDict:
@@ -889,7 +889,7 @@ class RestHelper:
             "GET",
             uri,
         )
-        assert channel.code == 302
+        assert channel.code == 302, f"Expected 302 for {uri}, got {channel.code}"
 
         # hit the redirect url again with the right Host header, which should now issue
         # a cookie and redirect to the SSO provider.
@@ -901,17 +901,18 @@ class RestHelper:
 
         location = get_location(channel)
         parts = urllib.parse.urlsplit(location)
+        next_uri = urllib.parse.urlunsplit(("", "") + parts[2:])
         channel = make_request(
             self.reactor,
             self.site,
             "GET",
-            urllib.parse.urlunsplit(("", "") + parts[2:]),
+            next_uri,
             custom_headers=[
                 ("Host", parts[1]),
             ],
         )
 
-        assert channel.code == 302
+        assert channel.code == 302, f"Expected 302 for {next_uri}, got {channel.code}"
         channel.extract_cookies(cookies)
         return get_location(channel)
 
diff --git a/tests/storage/test_purge.py b/tests/storage/test_purge.py
index 080d5640a5..0aa14fd1f4 100644
--- a/tests/storage/test_purge.py
+++ b/tests/storage/test_purge.py
@@ -23,6 +23,8 @@ from twisted.test.proto_helpers import MemoryReactor
 from synapse.api.errors import NotFoundError, SynapseError
 from synapse.rest.client import room
 from synapse.server import HomeServer
+from synapse.types.state import StateFilter
+from synapse.types.storage import _BackgroundUpdates
 from synapse.util import Clock
 
 from tests.unittest import HomeserverTestCase
@@ -40,6 +42,8 @@ class PurgeTests(HomeserverTestCase):
         self.room_id = self.helper.create_room_as(self.user_id)
 
         self.store = hs.get_datastores().main
+        self.state_store = hs.get_datastores().state
+        self.state_deletion_store = hs.get_datastores().state_deletion
         self._storage_controllers = self.hs.get_storage_controllers()
 
     def test_purge_history(self) -> None:
@@ -128,3 +132,328 @@ class PurgeTests(HomeserverTestCase):
         self.store._invalidate_local_get_event_cache(create_event.event_id)
         self.get_failure(self.store.get_event(create_event.event_id), NotFoundError)
         self.get_failure(self.store.get_event(first["event_id"]), NotFoundError)
+
+    def test_purge_history_deletes_state_groups(self) -> None:
+        """Test that unreferenced state groups get cleaned up after purge"""
+
+        # Send four state changes to the room.
+        first = self.helper.send_state(
+            self.room_id, event_type="m.foo", body={"test": 1}
+        )
+        second = self.helper.send_state(
+            self.room_id, event_type="m.foo", body={"test": 2}
+        )
+        third = self.helper.send_state(
+            self.room_id, event_type="m.foo", body={"test": 3}
+        )
+        last = self.helper.send_state(
+            self.room_id, event_type="m.foo", body={"test": 4}
+        )
+
+        # Get references to the state groups
+        event_to_groups = self.get_success(
+            self.store._get_state_group_for_events(
+                [
+                    first["event_id"],
+                    second["event_id"],
+                    third["event_id"],
+                    last["event_id"],
+                ]
+            )
+        )
+
+        # Get the topological token
+        token = self.get_success(
+            self.store.get_topological_token_for_event(last["event_id"])
+        )
+        token_str = self.get_success(token.to_string(self.hs.get_datastores().main))
+
+        # Purge everything before this topological token
+        self.get_success(
+            self._storage_controllers.purge_events.purge_history(
+                self.room_id, token_str, True
+            )
+        )
+
+        # Advance so that the background jobs to delete the state groups runs
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # We expect all the state groups associated with events above, except
+        # the last one, should return no state.
+        state_groups = self.get_success(
+            self.state_store._get_state_groups_from_groups(
+                list(event_to_groups.values()), StateFilter.all()
+            )
+        )
+        first_state = state_groups[event_to_groups[first["event_id"]]]
+        second_state = state_groups[event_to_groups[second["event_id"]]]
+        third_state = state_groups[event_to_groups[third["event_id"]]]
+        last_state = state_groups[event_to_groups[last["event_id"]]]
+
+        self.assertEqual(first_state, {})
+        self.assertEqual(second_state, {})
+        self.assertEqual(third_state, {})
+        self.assertNotEqual(last_state, {})
+
+    def test_purge_unreferenced_state_group(self) -> None:
+        """Test that purging a room also gets rid of unreferenced state groups
+        it encounters during the purge.
+
+        This is important, as otherwise these unreferenced state groups get
+        "de-deltaed" during the purge process, consuming lots of disk space.
+        """
+
+        self.helper.send(self.room_id, body="test1")
+        state1 = self.helper.send_state(
+            self.room_id, "org.matrix.test", body={"number": 2}
+        )
+        state2 = self.helper.send_state(
+            self.room_id, "org.matrix.test", body={"number": 3}
+        )
+        self.helper.send(self.room_id, body="test4")
+        last = self.helper.send(self.room_id, body="test5")
+
+        # Create an unreferenced state group that has a prev group of one of the
+        # to-be-purged events.
+        prev_group = self.get_success(
+            self.store._get_state_group_for_event(state1["event_id"])
+        )
+        unreferenced_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=prev_group,
+                delta_ids={("org.matrix.test", ""): state2["event_id"]},
+                current_state_ids=None,
+            )
+        )
+
+        # Get the topological token
+        token = self.get_success(
+            self.store.get_topological_token_for_event(last["event_id"])
+        )
+        token_str = self.get_success(token.to_string(self.hs.get_datastores().main))
+
+        # Purge everything before this topological token
+        self.get_success(
+            self._storage_controllers.purge_events.purge_history(
+                self.room_id, token_str, True
+            )
+        )
+
+        # Advance so that the background jobs to delete the state groups runs
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # We expect that the unreferenced state group has been deleted from all tables.
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups",
+                keyvalues={"id": unreferenced_state_group},
+                retcol="id",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups_state",
+                keyvalues={"state_group": unreferenced_state_group},
+                retcol="state_group",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_group_edges",
+                keyvalues={"state_group": unreferenced_state_group},
+                retcol="state_group",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups_pending_deletion",
+                keyvalues={"state_group": unreferenced_state_group},
+                retcol="state_group",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        # We expect there to now only be one state group for the room, which is
+        # the state group of the last event (as the only outlier).
+        state_groups = self.get_success(
+            self.state_store.db_pool.simple_select_onecol(
+                table="state_groups",
+                keyvalues={"room_id": self.room_id},
+                retcol="id",
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertEqual(len(state_groups), 1)
+
+    def test_clear_unreferenced_state_groups(self) -> None:
+        """Test that any unreferenced state groups are automatically cleaned up."""
+
+        self.helper.send(self.room_id, body="test1")
+        state1 = self.helper.send_state(
+            self.room_id, "org.matrix.test", body={"number": 2}
+        )
+        # Create enough state events to require multiple batches of
+        # mark_unreferenced_state_groups_for_deletion_bg_update to be run.
+        for i in range(200):
+            self.helper.send_state(self.room_id, "org.matrix.test", body={"number": i})
+        self.helper.send(self.room_id, body="test4")
+        last = self.helper.send(self.room_id, body="test5")
+
+        # Create an unreferenced state group that has no prev group.
+        unreferenced_free_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=None,
+                delta_ids={("org.matrix.test", ""): state1["event_id"]},
+                current_state_ids={("org.matrix.test", ""): ""},
+            )
+        )
+
+        # Create some unreferenced state groups that have a prev group of one of the
+        # existing state groups.
+        prev_group = self.get_success(
+            self.store._get_state_group_for_event(state1["event_id"])
+        )
+        unreferenced_end_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=prev_group,
+                delta_ids={("org.matrix.test", ""): state1["event_id"]},
+                current_state_ids=None,
+            )
+        )
+        another_unreferenced_end_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=unreferenced_end_state_group,
+                delta_ids={("org.matrix.test", ""): state1["event_id"]},
+                current_state_ids=None,
+            )
+        )
+
+        # Add some other unreferenced state groups which lead to a referenced state
+        # group.
+        # These state groups should not get deleted.
+        chain_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=None,
+                delta_ids={("org.matrix.test", ""): ""},
+                current_state_ids={("org.matrix.test", ""): ""},
+            )
+        )
+        chain_state_group_2 = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=chain_state_group,
+                delta_ids={("org.matrix.test", ""): ""},
+                current_state_ids=None,
+            )
+        )
+        referenced_chain_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event_id=last["event_id"],
+                room_id=self.room_id,
+                prev_group=chain_state_group_2,
+                delta_ids={("org.matrix.test", ""): ""},
+                current_state_ids=None,
+            )
+        )
+        self.get_success(
+            self.store.db_pool.simple_insert(
+                "event_to_state_groups",
+                {
+                    "event_id": "$new_event",
+                    "state_group": referenced_chain_state_group,
+                },
+            )
+        )
+
+        # Insert and run the background update.
+        self.get_success(
+            self.store.db_pool.simple_insert(
+                "background_updates",
+                {
+                    "update_name": _BackgroundUpdates.MARK_UNREFERENCED_STATE_GROUPS_FOR_DELETION_BG_UPDATE,
+                    "progress_json": "{}",
+                },
+            )
+        )
+        self.store.db_pool.updates._all_done = False
+        self.wait_for_background_updates()
+
+        # Advance so that the background job to delete the state groups runs
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # We expect that the unreferenced free state group has been deleted.
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups",
+                keyvalues={"id": unreferenced_free_state_group},
+                retcol="id",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        # We expect that both unreferenced end state groups have been deleted.
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups",
+                keyvalues={"id": unreferenced_end_state_group},
+                retcol="id",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+        row = self.get_success(
+            self.state_store.db_pool.simple_select_one_onecol(
+                table="state_groups",
+                keyvalues={"id": another_unreferenced_end_state_group},
+                retcol="id",
+                allow_none=True,
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertIsNone(row)
+
+        # We expect there to now only be one state group for the room, which is
+        # the state group of the last event (as the only outlier).
+        state_groups = self.get_success(
+            self.state_store.db_pool.simple_select_onecol(
+                table="state_groups",
+                keyvalues={"room_id": self.room_id},
+                retcol="id",
+                desc="test_purge_unreferenced_state_group",
+            )
+        )
+        self.assertEqual(len(state_groups), 210)
diff --git a/tests/storage/test_state_deletion.py b/tests/storage/test_state_deletion.py
new file mode 100644
index 0000000000..a4d318ae20
--- /dev/null
+++ b/tests/storage/test_state_deletion.py
@@ -0,0 +1,475 @@
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright (C) 2025 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+
+
+import logging
+
+from twisted.test.proto_helpers import MemoryReactor
+
+from synapse.rest import admin
+from synapse.rest.client import login, room
+from synapse.server import HomeServer
+from synapse.util import Clock
+
+from tests.test_utils.event_injection import create_event
+from tests.unittest import HomeserverTestCase
+
+logger = logging.getLogger(__name__)
+
+
+class StateDeletionStoreTestCase(HomeserverTestCase):
+    """Tests for the StateDeletionStore."""
+
+    servlets = [
+        admin.register_servlets,
+        room.register_servlets,
+        login.register_servlets,
+    ]
+
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+        self.store = hs.get_datastores().main
+        self.state_store = hs.get_datastores().state
+        self.state_deletion_store = hs.get_datastores().state_deletion
+        self.purge_events = hs.get_storage_controllers().purge_events
+
+        # We want to disable the automatic deletion of state groups in the
+        # background, so we can do controlled tests.
+        self.purge_events._delete_state_loop_call.stop()
+
+        self.user_id = self.register_user("test", "password")
+        tok = self.login("test", "password")
+        self.room_id = self.helper.create_room_as(self.user_id, tok=tok)
+
+    def check_if_can_be_deleted(self, state_group: int) -> bool:
+        """Check if the state group is pending deletion."""
+
+        state_group_to_sequence_number = self.get_success(
+            self.state_deletion_store.get_pending_deletions([state_group])
+        )
+
+        can_be_deleted = self.get_success(
+            self.state_deletion_store.db_pool.runInteraction(
+                "test_existing_pending_deletion_is_cleared",
+                self.state_deletion_store.get_state_groups_ready_for_potential_deletion_txn,
+                state_group_to_sequence_number,
+            )
+        )
+
+        return state_group in can_be_deleted
+
+    def test_no_deletion(self) -> None:
+        """Test that calling persisting_state_group_references is fine if
+        nothing is pending deletion"""
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                sender=self.user_id,
+            )
+        )
+
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+
+        self.get_success(ctx_mgr.__aenter__())
+        self.get_success(ctx_mgr.__aexit__(None, None, None))
+
+    def test_no_deletion_error(self) -> None:
+        """Test that calling persisting_state_group_references is fine if
+        nothing is pending deletion, but an error occurs."""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                sender=self.user_id,
+            )
+        )
+
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+
+        self.get_success(ctx_mgr.__aenter__())
+        self.get_success(ctx_mgr.__aexit__(Exception, Exception("test"), None))
+
+    def test_existing_pending_deletion_is_cleared(self) -> None:
+        """Test that the pending deletion flag gets cleared when the state group
+        gets persisted."""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        # Mark a state group that we're referencing as pending deletion.
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group]
+            )
+        )
+
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+
+        self.get_success(ctx_mgr.__aenter__())
+        self.get_success(ctx_mgr.__aexit__(None, None, None))
+
+        # The pending deletion flag should be cleared
+        pending_deletion = self.get_success(
+            self.state_deletion_store.db_pool.simple_select_one_onecol(
+                table="state_groups_pending_deletion",
+                keyvalues={"state_group": context.state_group},
+                retcol="1",
+                allow_none=True,
+                desc="test_existing_pending_deletion_is_cleared",
+            )
+        )
+        self.assertIsNone(pending_deletion)
+
+    def test_pending_deletion_is_cleared_during_persist(self) -> None:
+        """Test that the pending deletion flag is cleared when a state group
+        gets marked for deletion during persistence"""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+        self.get_success(ctx_mgr.__aenter__())
+
+        # Mark the state group that we're referencing as pending deletion,
+        # *after* we have started persisting.
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group]
+            )
+        )
+
+        self.get_success(ctx_mgr.__aexit__(None, None, None))
+
+        # The pending deletion flag should be cleared
+        pending_deletion = self.get_success(
+            self.state_deletion_store.db_pool.simple_select_one_onecol(
+                table="state_groups_pending_deletion",
+                keyvalues={"state_group": context.state_group},
+                retcol="1",
+                allow_none=True,
+                desc="test_existing_pending_deletion_is_cleared",
+            )
+        )
+        self.assertIsNone(pending_deletion)
+
+    def test_deletion_check(self) -> None:
+        """Test that the `get_state_groups_that_can_be_purged_txn` check is
+        correct during different points of the lifecycle of persisting an
+        event."""
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group]
+            )
+        )
+
+        # We shouldn't be able to delete the state group as not enough time as passed
+        can_be_deleted = self.check_if_can_be_deleted(context.state_group)
+        self.assertFalse(can_be_deleted)
+
+        # After enough time we can delete the state group
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+        can_be_deleted = self.check_if_can_be_deleted(context.state_group)
+        self.assertTrue(can_be_deleted)
+
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+        self.get_success(ctx_mgr.__aenter__())
+
+        # But once we start persisting we can't delete the state group
+        can_be_deleted = self.check_if_can_be_deleted(context.state_group)
+        self.assertFalse(can_be_deleted)
+
+        self.get_success(ctx_mgr.__aexit__(None, None, None))
+
+        # The pending deletion flag should remain cleared after persistence has
+        # finished.
+        can_be_deleted = self.check_if_can_be_deleted(context.state_group)
+        self.assertFalse(can_be_deleted)
+
+    def test_deletion_error_during_persistence(self) -> None:
+        """Test that state groups remain marked as pending deletion if persisting
+        the event fails."""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        # Mark a state group that we're referencing as pending deletion.
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group]
+            )
+        )
+
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+
+        self.get_success(ctx_mgr.__aenter__())
+        self.get_success(ctx_mgr.__aexit__(Exception, Exception("test"), None))
+
+        # We should be able to delete the state group after a certain amount of
+        # time
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+        can_be_deleted = self.check_if_can_be_deleted(context.state_group)
+        self.assertTrue(can_be_deleted)
+
+    def test_race_between_check_and_insert(self) -> None:
+        """Check that we correctly handle the race where we go to delete a
+        state group, check that it is unreferenced, and then it becomes
+        referenced just before we delete it."""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        # Mark a state group that we're referencing as pending deletion.
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group]
+            )
+        )
+
+        # Advance time enough so we can delete the state group
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # Check that we'd be able to delete this state group.
+        state_group_to_sequence_number = self.get_success(
+            self.state_deletion_store.get_pending_deletions([context.state_group])
+        )
+
+        can_be_deleted = self.get_success(
+            self.state_deletion_store.db_pool.runInteraction(
+                "test_existing_pending_deletion_is_cleared",
+                self.state_deletion_store.get_state_groups_ready_for_potential_deletion_txn,
+                state_group_to_sequence_number,
+            )
+        )
+        self.assertCountEqual(can_be_deleted, [context.state_group])
+
+        # ... in the real world we'd check that the state group isn't referenced here ...
+
+        # Now we persist the event to reference the state group, *after* we
+        # check that the state group wasn't referenced
+        ctx_mgr = self.state_deletion_store.persisting_state_group_references(
+            [(event, context)]
+        )
+
+        self.get_success(ctx_mgr.__aenter__())
+        self.get_success(ctx_mgr.__aexit__(Exception, Exception("test"), None))
+
+        # We simulate a pause (required to hit the race)
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # We should no longer be able to delete the state group, without having
+        # to recheck if its referenced.
+        can_be_deleted = self.get_success(
+            self.state_deletion_store.db_pool.runInteraction(
+                "test_existing_pending_deletion_is_cleared",
+                self.state_deletion_store.get_state_groups_ready_for_potential_deletion_txn,
+                state_group_to_sequence_number,
+            )
+        )
+        self.assertCountEqual(can_be_deleted, [])
+
+    def test_remove_ancestors_from_can_delete(self) -> None:
+        """Test that if a state group is not ready to be deleted, we also don't
+        delete anything that is referenced by it"""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        # Create a new state group that references the one from the event
+        new_state_group = self.get_success(
+            self.state_store.store_state_group(
+                event.event_id,
+                event.room_id,
+                prev_group=context.state_group,
+                delta_ids={},
+                current_state_ids=None,
+            )
+        )
+
+        # Mark them both as pending deletion
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group, new_state_group]
+            )
+        )
+
+        # Advance time enough so we can delete the state group so they're both
+        # ready for deletion.
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # We can now delete both state groups
+        self.assertTrue(self.check_if_can_be_deleted(context.state_group))
+        self.assertTrue(self.check_if_can_be_deleted(new_state_group))
+
+        # Use the new_state_group to bump its deletion time
+        self.get_success(
+            self.state_store.store_state_group(
+                event.event_id,
+                event.room_id,
+                prev_group=new_state_group,
+                delta_ids={},
+                current_state_ids=None,
+            )
+        )
+
+        # We should now not be able to delete either of the state groups.
+        state_group_to_sequence_number = self.get_success(
+            self.state_deletion_store.get_pending_deletions(
+                [context.state_group, new_state_group]
+            )
+        )
+
+        # We shouldn't be able to delete the state group as not enough time has passed
+        can_be_deleted = self.get_success(
+            self.state_deletion_store.db_pool.runInteraction(
+                "test_existing_pending_deletion_is_cleared",
+                self.state_deletion_store.get_state_groups_ready_for_potential_deletion_txn,
+                state_group_to_sequence_number,
+            )
+        )
+        self.assertCountEqual(can_be_deleted, [])
+
+    def test_newly_referenced_state_group_gets_removed_from_pending(self) -> None:
+        """Check that if a state group marked for deletion becomes referenced
+        (without being removed from pending deletion table), it gets removed
+        from pending deletion table."""
+
+        event, context = self.get_success(
+            create_event(
+                self.hs,
+                room_id=self.room_id,
+                type="m.test",
+                state_key="",
+                sender=self.user_id,
+            )
+        )
+        assert context.state_group is not None
+
+        # Mark a state group that we're referencing as pending deletion.
+        self.get_success(
+            self.state_deletion_store.mark_state_groups_as_pending_deletion(
+                [context.state_group]
+            )
+        )
+
+        # Advance time enough so we can delete the state group so they're both
+        # ready for deletion.
+        self.reactor.advance(
+            1 + self.state_deletion_store.DELAY_BEFORE_DELETION_MS / 1000
+        )
+
+        # Manually insert into the table to mimic the state group getting used.
+        self.get_success(
+            self.store.db_pool.simple_insert(
+                table="event_to_state_groups",
+                values={"state_group": context.state_group, "event_id": event.event_id},
+                desc="test_newly_referenced_state_group_gets_removed_from_pending",
+            )
+        )
+
+        # Manually run the background task to delete pending state groups.
+        self.get_success(self.purge_events._delete_state_groups_loop())
+
+        # The pending deletion flag should be cleared...
+        pending_deletion = self.get_success(
+            self.state_deletion_store.db_pool.simple_select_one_onecol(
+                table="state_groups_pending_deletion",
+                keyvalues={"state_group": context.state_group},
+                retcol="1",
+                allow_none=True,
+                desc="test_newly_referenced_state_group_gets_removed_from_pending",
+            )
+        )
+        self.assertIsNone(pending_deletion)
+
+        # .. but the state should not have been deleted.
+        state = self.get_success(
+            self.state_store._get_state_for_groups([context.state_group])
+        )
+        self.assertGreater(len(state[context.state_group]), 0)
diff --git a/tests/storage/test_stream.py b/tests/storage/test_stream.py
index 38a56419f3..0f58dc8a0a 100644
--- a/tests/storage/test_stream.py
+++ b/tests/storage/test_stream.py
@@ -1209,12 +1209,6 @@ class GetCurrentStateDeltaMembershipChangesForUserTestCase(HomeserverTestCase):
             self.persistence.persist_event(join_rule_event, join_rule_context)
         )
 
-        # FIXME: We're manually busting the cache since
-        # https://github.com/element-hq/synapse/issues/17368 is not solved yet
-        self.store._membership_stream_cache.entity_has_changed(
-            user1_id, join_rule_event_pos.stream
-        )
-
         after_reset_token = self.event_sources.get_current_token()
 
         membership_changes = self.get_success(
diff --git a/tests/test_federation.py b/tests/test_federation.py
deleted file mode 100644
index 94b0fa9856..0000000000
--- a/tests/test_federation.py
+++ /dev/null
@@ -1,378 +0,0 @@
-#
-# This file is licensed under the Affero General Public License (AGPL) version 3.
-#
-# Copyright 2020 The Matrix.org Foundation C.I.C.
-# Copyright (C) 2023 New Vector, Ltd
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# See the GNU Affero General Public License for more details:
-# <https://www.gnu.org/licenses/agpl-3.0.html>.
-#
-# Originally licensed under the Apache License, Version 2.0:
-# <http://www.apache.org/licenses/LICENSE-2.0>.
-#
-# [This file includes modifications made by New Vector Limited]
-#
-#
-
-from typing import Collection, List, Optional, Union
-from unittest.mock import AsyncMock, Mock
-
-from twisted.test.proto_helpers import MemoryReactor
-
-from synapse.api.errors import FederationError
-from synapse.api.room_versions import RoomVersion, RoomVersions
-from synapse.events import EventBase, make_event_from_dict
-from synapse.events.snapshot import EventContext
-from synapse.federation.federation_base import event_from_pdu_json
-from synapse.handlers.device import DeviceListUpdater
-from synapse.http.types import QueryParams
-from synapse.logging.context import LoggingContext
-from synapse.server import HomeServer
-from synapse.types import JsonDict, UserID, create_requester
-from synapse.util import Clock
-from synapse.util.retryutils import NotRetryingDestination
-
-from tests import unittest
-
-
-class MessageAcceptTests(unittest.HomeserverTestCase):
-    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
-        self.http_client = Mock()
-        return self.setup_test_homeserver(federation_http_client=self.http_client)
-
-    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
-        user_id = UserID("us", "test")
-        our_user = create_requester(user_id)
-        room_creator = self.hs.get_room_creation_handler()
-        self.room_id = self.get_success(
-            room_creator.create_room(
-                our_user, room_creator._presets_dict["public_chat"], ratelimit=False
-            )
-        )[0]
-
-        self.store = self.hs.get_datastores().main
-
-        # Figure out what the most recent event is
-        most_recent = next(
-            iter(
-                self.get_success(
-                    self.hs.get_datastores().main.get_latest_event_ids_in_room(
-                        self.room_id
-                    )
-                )
-            )
-        )
-
-        join_event = make_event_from_dict(
-            {
-                "room_id": self.room_id,
-                "sender": "@baduser:test.serv",
-                "state_key": "@baduser:test.serv",
-                "event_id": "$join:test.serv",
-                "depth": 1000,
-                "origin_server_ts": 1,
-                "type": "m.room.member",
-                "origin": "test.servx",
-                "content": {"membership": "join"},
-                "auth_events": [],
-                "prev_state": [(most_recent, {})],
-                "prev_events": [(most_recent, {})],
-            }
-        )
-
-        self.handler = self.hs.get_federation_handler()
-        federation_event_handler = self.hs.get_federation_event_handler()
-
-        async def _check_event_auth(
-            origin: Optional[str], event: EventBase, context: EventContext
-        ) -> None:
-            pass
-
-        federation_event_handler._check_event_auth = _check_event_auth  # type: ignore[method-assign]
-        self.client = self.hs.get_federation_client()
-
-        async def _check_sigs_and_hash_for_pulled_events_and_fetch(
-            dest: str, pdus: Collection[EventBase], room_version: RoomVersion
-        ) -> List[EventBase]:
-            return list(pdus)
-
-        self.client._check_sigs_and_hash_for_pulled_events_and_fetch = (  # type: ignore[method-assign]
-            _check_sigs_and_hash_for_pulled_events_and_fetch  # type: ignore[assignment]
-        )
-
-        # Send the join, it should return None (which is not an error)
-        self.assertEqual(
-            self.get_success(
-                federation_event_handler.on_receive_pdu("test.serv", join_event)
-            ),
-            None,
-        )
-
-        # Make sure we actually joined the room
-        self.assertEqual(
-            self.get_success(self.store.get_latest_event_ids_in_room(self.room_id)),
-            {"$join:test.serv"},
-        )
-
-    def test_cant_hide_direct_ancestors(self) -> None:
-        """
-        If you send a message, you must be able to provide the direct
-        prev_events that said event references.
-        """
-
-        async def post_json(
-            destination: str,
-            path: str,
-            data: Optional[JsonDict] = None,
-            long_retries: bool = False,
-            timeout: Optional[int] = None,
-            ignore_backoff: bool = False,
-            args: Optional[QueryParams] = None,
-        ) -> Union[JsonDict, list]:
-            # If it asks us for new missing events, give them NOTHING
-            if path.startswith("/_matrix/federation/v1/get_missing_events/"):
-                return {"events": []}
-            return {}
-
-        self.http_client.post_json = post_json
-
-        # Figure out what the most recent event is
-        most_recent = next(
-            iter(
-                self.get_success(self.store.get_latest_event_ids_in_room(self.room_id))
-            )
-        )
-
-        # Now lie about an event
-        lying_event = make_event_from_dict(
-            {
-                "room_id": self.room_id,
-                "sender": "@baduser:test.serv",
-                "event_id": "one:test.serv",
-                "depth": 1000,
-                "origin_server_ts": 1,
-                "type": "m.room.message",
-                "origin": "test.serv",
-                "content": {"body": "hewwo?"},
-                "auth_events": [],
-                "prev_events": [("two:test.serv", {}), (most_recent, {})],
-            }
-        )
-
-        federation_event_handler = self.hs.get_federation_event_handler()
-        with LoggingContext("test-context"):
-            failure = self.get_failure(
-                federation_event_handler.on_receive_pdu("test.serv", lying_event),
-                FederationError,
-            )
-
-        # on_receive_pdu should throw an error
-        self.assertEqual(
-            failure.value.args[0],
-            (
-                "ERROR 403: Your server isn't divulging details about prev_events "
-                "referenced in this event."
-            ),
-        )
-
-        # Make sure the invalid event isn't there
-        extrem = self.get_success(self.store.get_latest_event_ids_in_room(self.room_id))
-        self.assertEqual(extrem, {"$join:test.serv"})
-
-    def test_retry_device_list_resync(self) -> None:
-        """Tests that device lists are marked as stale if they couldn't be synced, and
-        that stale device lists are retried periodically.
-        """
-        remote_user_id = "@john:test_remote"
-        remote_origin = "test_remote"
-
-        # Track the number of attempts to resync the user's device list.
-        self.resync_attempts = 0
-
-        # When this function is called, increment the number of resync attempts (only if
-        # we're querying devices for the right user ID), then raise a
-        # NotRetryingDestination error to fail the resync gracefully.
-        def query_user_devices(
-            destination: str, user_id: str, timeout: int = 30000
-        ) -> JsonDict:
-            if user_id == remote_user_id:
-                self.resync_attempts += 1
-
-            raise NotRetryingDestination(0, 0, destination)
-
-        # Register the mock on the federation client.
-        federation_client = self.hs.get_federation_client()
-        federation_client.query_user_devices = Mock(side_effect=query_user_devices)  # type: ignore[method-assign]
-
-        # Register a mock on the store so that the incoming update doesn't fail because
-        # we don't share a room with the user.
-        store = self.hs.get_datastores().main
-        store.get_rooms_for_user = AsyncMock(return_value=["!someroom:test"])
-
-        # Manually inject a fake device list update. We need this update to include at
-        # least one prev_id so that the user's device list will need to be retried.
-        device_list_updater = self.hs.get_device_handler().device_list_updater
-        assert isinstance(device_list_updater, DeviceListUpdater)
-        self.get_success(
-            device_list_updater.incoming_device_list_update(
-                origin=remote_origin,
-                edu_content={
-                    "deleted": False,
-                    "device_display_name": "Mobile",
-                    "device_id": "QBUAZIFURK",
-                    "prev_id": [5],
-                    "stream_id": 6,
-                    "user_id": remote_user_id,
-                },
-            )
-        )
-
-        # Check that there was one resync attempt.
-        self.assertEqual(self.resync_attempts, 1)
-
-        # Check that the resync attempt failed and caused the user's device list to be
-        # marked as stale.
-        need_resync = self.get_success(
-            store.get_user_ids_requiring_device_list_resync()
-        )
-        self.assertIn(remote_user_id, need_resync)
-
-        # Check that waiting for 30 seconds caused Synapse to retry resyncing the device
-        # list.
-        self.reactor.advance(30)
-        self.assertEqual(self.resync_attempts, 2)
-
-    def test_cross_signing_keys_retry(self) -> None:
-        """Tests that resyncing a device list correctly processes cross-signing keys from
-        the remote server.
-        """
-        remote_user_id = "@john:test_remote"
-        remote_master_key = "85T7JXPFBAySB/jwby4S3lBPTqY3+Zg53nYuGmu1ggY"
-        remote_self_signing_key = "QeIiFEjluPBtI7WQdG365QKZcFs9kqmHir6RBD0//nQ"
-
-        # Register mock device list retrieval on the federation client.
-        federation_client = self.hs.get_federation_client()
-        federation_client.query_user_devices = AsyncMock(  # type: ignore[method-assign]
-            return_value={
-                "user_id": remote_user_id,
-                "stream_id": 1,
-                "devices": [],
-                "master_key": {
-                    "user_id": remote_user_id,
-                    "usage": ["master"],
-                    "keys": {"ed25519:" + remote_master_key: remote_master_key},
-                },
-                "self_signing_key": {
-                    "user_id": remote_user_id,
-                    "usage": ["self_signing"],
-                    "keys": {
-                        "ed25519:" + remote_self_signing_key: remote_self_signing_key
-                    },
-                },
-            }
-        )
-
-        # Resync the device list.
-        device_handler = self.hs.get_device_handler()
-        self.get_success(
-            device_handler.device_list_updater.multi_user_device_resync(
-                [remote_user_id]
-            ),
-        )
-
-        # Retrieve the cross-signing keys for this user.
-        keys = self.get_success(
-            self.store.get_e2e_cross_signing_keys_bulk(user_ids=[remote_user_id]),
-        )
-        self.assertIn(remote_user_id, keys)
-        key = keys[remote_user_id]
-        assert key is not None
-
-        # Check that the master key is the one returned by the mock.
-        master_key = key["master"]
-        self.assertEqual(len(master_key["keys"]), 1)
-        self.assertTrue("ed25519:" + remote_master_key in master_key["keys"].keys())
-        self.assertTrue(remote_master_key in master_key["keys"].values())
-
-        # Check that the self-signing key is the one returned by the mock.
-        self_signing_key = key["self_signing"]
-        self.assertEqual(len(self_signing_key["keys"]), 1)
-        self.assertTrue(
-            "ed25519:" + remote_self_signing_key in self_signing_key["keys"].keys(),
-        )
-        self.assertTrue(remote_self_signing_key in self_signing_key["keys"].values())
-
-
-class StripUnsignedFromEventsTestCase(unittest.TestCase):
-    def test_strip_unauthorized_unsigned_values(self) -> None:
-        event1 = {
-            "sender": "@baduser:test.serv",
-            "state_key": "@baduser:test.serv",
-            "event_id": "$event1:test.serv",
-            "depth": 1000,
-            "origin_server_ts": 1,
-            "type": "m.room.member",
-            "origin": "test.servx",
-            "content": {"membership": "join"},
-            "auth_events": [],
-            "unsigned": {"malicious garbage": "hackz", "more warez": "more hackz"},
-        }
-        filtered_event = event_from_pdu_json(event1, RoomVersions.V1)
-        # Make sure unauthorized fields are stripped from unsigned
-        self.assertNotIn("more warez", filtered_event.unsigned)
-
-    def test_strip_event_maintains_allowed_fields(self) -> None:
-        event2 = {
-            "sender": "@baduser:test.serv",
-            "state_key": "@baduser:test.serv",
-            "event_id": "$event2:test.serv",
-            "depth": 1000,
-            "origin_server_ts": 1,
-            "type": "m.room.member",
-            "origin": "test.servx",
-            "auth_events": [],
-            "content": {"membership": "join"},
-            "unsigned": {
-                "malicious garbage": "hackz",
-                "more warez": "more hackz",
-                "age": 14,
-                "invite_room_state": [],
-            },
-        }
-
-        filtered_event2 = event_from_pdu_json(event2, RoomVersions.V1)
-        self.assertIn("age", filtered_event2.unsigned)
-        self.assertEqual(14, filtered_event2.unsigned["age"])
-        self.assertNotIn("more warez", filtered_event2.unsigned)
-        # Invite_room_state is allowed in events of type m.room.member
-        self.assertIn("invite_room_state", filtered_event2.unsigned)
-        self.assertEqual([], filtered_event2.unsigned["invite_room_state"])
-
-    def test_strip_event_removes_fields_based_on_event_type(self) -> None:
-        event3 = {
-            "sender": "@baduser:test.serv",
-            "state_key": "@baduser:test.serv",
-            "event_id": "$event3:test.serv",
-            "depth": 1000,
-            "origin_server_ts": 1,
-            "type": "m.room.power_levels",
-            "origin": "test.servx",
-            "content": {},
-            "auth_events": [],
-            "unsigned": {
-                "malicious garbage": "hackz",
-                "more warez": "more hackz",
-                "age": 14,
-                "invite_room_state": [],
-            },
-        }
-        filtered_event3 = event_from_pdu_json(event3, RoomVersions.V1)
-        self.assertIn("age", filtered_event3.unsigned)
-        # Invite_room_state field is only permitted in event type m.room.member
-        self.assertNotIn("invite_room_state", filtered_event3.unsigned)
-        self.assertNotIn("more warez", filtered_event3.unsigned)
diff --git a/tests/test_state.py b/tests/test_state.py
index 311a590693..dce56fe78a 100644
--- a/tests/test_state.py
+++ b/tests/test_state.py
@@ -31,7 +31,7 @@ from typing import (
     Tuple,
     cast,
 )
-from unittest.mock import Mock
+from unittest.mock import AsyncMock, Mock
 
 from twisted.internet import defer
 
@@ -221,7 +221,16 @@ class Graph:
 class StateTestCase(unittest.TestCase):
     def setUp(self) -> None:
         self.dummy_store = _DummyStore()
-        storage_controllers = Mock(main=self.dummy_store, state=self.dummy_store)
+
+        # Add a dummy epoch store that always retruns that we have all the
+        # necessary state groups.
+        dummy_deletion_store = AsyncMock()
+        dummy_deletion_store.check_state_groups_and_bump_deletion.return_value = []
+
+        storage_controllers = Mock(
+            main=self.dummy_store,
+            state=self.dummy_store,
+        )
         hs = Mock(
             spec_set=[
                 "config",
@@ -241,7 +250,10 @@ class StateTestCase(unittest.TestCase):
         )
         clock = cast(Clock, MockClock())
         hs.config = default_config("tesths", True)
-        hs.get_datastores.return_value = Mock(main=self.dummy_store)
+        hs.get_datastores.return_value = Mock(
+            main=self.dummy_store,
+            state_deletion=dummy_deletion_store,
+        )
         hs.get_state_handler.return_value = None
         hs.get_clock.return_value = clock
         hs.get_macaroon_generator.return_value = MacaroonGenerator(
diff --git a/tests/unittest.py b/tests/unittest.py
index 614e805abd..24077d79d6 100644
--- a/tests/unittest.py
+++ b/tests/unittest.py
@@ -40,6 +40,7 @@ from typing import (
     Mapping,
     NoReturn,
     Optional,
+    Protocol,
     Tuple,
     Type,
     TypeVar,
@@ -50,7 +51,7 @@ from unittest.mock import Mock, patch
 import canonicaljson
 import signedjson.key
 import unpaddedbase64
-from typing_extensions import Concatenate, ParamSpec, Protocol
+from typing_extensions import Concatenate, ParamSpec
 
 from twisted.internet.defer import Deferred, ensureDeferred
 from twisted.python.failure import Failure
@@ -781,7 +782,7 @@ class HomeserverTestCase(TestCase):
         self,
         username: str,
         appservice_token: str,
-    ) -> Tuple[str, str]:
+    ) -> Tuple[str, Optional[str]]:
         """Register an appservice user as an application service.
         Requires the client-facing registration API be registered.
 
@@ -805,7 +806,7 @@ class HomeserverTestCase(TestCase):
             access_token=appservice_token,
         )
         self.assertEqual(channel.code, 200, channel.json_body)
-        return channel.json_body["user_id"], channel.json_body["device_id"]
+        return channel.json_body["user_id"], channel.json_body.get("device_id")
 
     def login(
         self,
diff --git a/tests/util/test_linearizer.py b/tests/util/test_linearizer.py
index 7cbb1007da..7510657b85 100644
--- a/tests/util/test_linearizer.py
+++ b/tests/util/test_linearizer.py
@@ -19,9 +19,7 @@
 #
 #
 
-from typing import Hashable, Tuple
-
-from typing_extensions import Protocol
+from typing import Hashable, Protocol, Tuple
 
 from twisted.internet import defer, reactor
 from twisted.internet.base import ReactorBase
diff --git a/tests/util/test_stream_change_cache.py b/tests/util/test_stream_change_cache.py
index c41f5706af..9254bff79b 100644
--- a/tests/util/test_stream_change_cache.py
+++ b/tests/util/test_stream_change_cache.py
@@ -255,3 +255,28 @@ class StreamChangeCacheTests(unittest.HomeserverTestCase):
 
         # Unknown entities will return None
         self.assertEqual(cache.get_max_pos_of_last_change("not@here.website"), None)
+
+    def test_all_entities_changed(self) -> None:
+        """
+        `StreamChangeCache.all_entities_changed(...)` will mark all entites as changed.
+        """
+        cache = StreamChangeCache("#test", 1, max_size=10)
+
+        cache.entity_has_changed("user@foo.com", 2)
+        cache.entity_has_changed("bar@baz.net", 3)
+        cache.entity_has_changed("user@elsewhere.org", 4)
+
+        cache.all_entities_changed(5)
+
+        # Everything should be marked as changed before the stream position where the
+        # change occurred.
+        self.assertTrue(cache.has_entity_changed("user@foo.com", 4))
+        self.assertTrue(cache.has_entity_changed("bar@baz.net", 4))
+        self.assertTrue(cache.has_entity_changed("user@elsewhere.org", 4))
+
+        # Nothing should be marked as changed at/after the stream position where the
+        # change occurred. In other words, nothing has changed since the stream position
+        # 5.
+        self.assertFalse(cache.has_entity_changed("user@foo.com", 5))
+        self.assertFalse(cache.has_entity_changed("bar@baz.net", 5))
+        self.assertFalse(cache.has_entity_changed("user@elsewhere.org", 5))
diff --git a/tests/util/test_stringutils.py b/tests/util/test_stringutils.py
index 646fd2163e..34c2395ecf 100644
--- a/tests/util/test_stringutils.py
+++ b/tests/util/test_stringutils.py
@@ -20,7 +20,11 @@
 #
 
 from synapse.api.errors import SynapseError
-from synapse.util.stringutils import assert_valid_client_secret, base62_encode
+from synapse.util.stringutils import (
+    assert_valid_client_secret,
+    base62_encode,
+    is_namedspaced_grammar,
+)
 
 from .. import unittest
 
@@ -58,3 +62,25 @@ class StringUtilsTestCase(unittest.TestCase):
         self.assertEqual("10", base62_encode(62))
         self.assertEqual("1c", base62_encode(100))
         self.assertEqual("001c", base62_encode(100, minwidth=4))
+
+    def test_namespaced_identifier(self) -> None:
+        self.assertTrue(is_namedspaced_grammar("test"))
+        self.assertTrue(is_namedspaced_grammar("m.test"))
+        self.assertTrue(is_namedspaced_grammar("org.matrix.test"))
+        self.assertTrue(is_namedspaced_grammar("org.matrix.msc1234"))
+        self.assertTrue(is_namedspaced_grammar("test"))
+        self.assertTrue(is_namedspaced_grammar("t-e_s.t"))
+
+        # Must start with letter.
+        self.assertFalse(is_namedspaced_grammar("1test"))
+        self.assertFalse(is_namedspaced_grammar("-test"))
+        self.assertFalse(is_namedspaced_grammar("_test"))
+        self.assertFalse(is_namedspaced_grammar(".test"))
+
+        # Must contain only a-z, 0-9, -, _, ..
+        self.assertFalse(is_namedspaced_grammar("test/"))
+        self.assertFalse(is_namedspaced_grammar('test"'))
+        self.assertFalse(is_namedspaced_grammar("testö"))
+
+        # Must be < 255 characters.
+        self.assertFalse(is_namedspaced_grammar("t" * 256))
diff --git a/tests/util/test_task_scheduler.py b/tests/util/test_task_scheduler.py
index 30f0510c9f..9e403b948b 100644
--- a/tests/util/test_task_scheduler.py
+++ b/tests/util/test_task_scheduler.py
@@ -18,8 +18,7 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
-
-from typing import Optional, Tuple
+from typing import List, Optional, Tuple
 
 from twisted.internet.task import deferLater
 from twisted.test.proto_helpers import MemoryReactor
@@ -104,33 +103,43 @@ class TestTaskScheduler(HomeserverTestCase):
                 )
             )
 
-        # This is to give the time to the active tasks to finish
-        self.reactor.advance(1)
-
-        # Check that only MAX_CONCURRENT_RUNNING_TASKS tasks has run and that one
-        # is still scheduled.
-        tasks = [
-            self.get_success(self.task_scheduler.get_task(task_id))
-            for task_id in task_ids
-        ]
+        def get_tasks_of_status(status: TaskStatus) -> List[ScheduledTask]:
+            tasks = (
+                self.get_success(self.task_scheduler.get_task(task_id))
+                for task_id in task_ids
+            )
+            return [t for t in tasks if t is not None and t.status == status]
 
+        # At this point, there should be MAX_CONCURRENT_RUNNING_TASKS active tasks and
+        # one scheduled task.
         self.assertEquals(
-            len(
-                [t for t in tasks if t is not None and t.status == TaskStatus.COMPLETE]
-            ),
+            len(get_tasks_of_status(TaskStatus.ACTIVE)),
             TaskScheduler.MAX_CONCURRENT_RUNNING_TASKS,
         )
+        self.assertEquals(
+            len(get_tasks_of_status(TaskStatus.SCHEDULED)),
+            1,
+        )
 
-        scheduled_tasks = [
-            t for t in tasks if t is not None and t.status == TaskStatus.ACTIVE
-        ]
-        self.assertEquals(len(scheduled_tasks), 1)
-
-        # We need to wait for the next run of the scheduler loop
-        self.reactor.advance((TaskScheduler.SCHEDULE_INTERVAL_MS / 1000))
+        # Give the time to the active tasks to finish
         self.reactor.advance(1)
 
-        # Check that the last task has been properly executed after the next scheduler loop run
+        # Check that MAX_CONCURRENT_RUNNING_TASKS tasks have run and that one
+        # is still scheduled.
+        self.assertEquals(
+            len(get_tasks_of_status(TaskStatus.COMPLETE)),
+            TaskScheduler.MAX_CONCURRENT_RUNNING_TASKS,
+        )
+        scheduled_tasks = get_tasks_of_status(TaskStatus.SCHEDULED)
+        self.assertEquals(len(scheduled_tasks), 1)
+
+        # The scheduled task should start 0.1s after the first of the active tasks
+        # finishes
+        self.reactor.advance(0.1)
+        self.assertEquals(len(get_tasks_of_status(TaskStatus.ACTIVE)), 1)
+
+        # ... and should finally complete after another second
+        self.reactor.advance(1)
         prev_scheduled_task = self.get_success(
             self.task_scheduler.get_task(scheduled_tasks[0].id)
         )
diff --git a/tests/utils.py b/tests/utils.py
index 9fd26ef348..0006bd7a8d 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -28,6 +28,7 @@ from typing import (
     Callable,
     Dict,
     List,
+    Literal,
     Optional,
     Tuple,
     Type,
@@ -37,7 +38,7 @@ from typing import (
 )
 
 import attr
-from typing_extensions import Literal, ParamSpec
+from typing_extensions import ParamSpec
 
 from synapse.api.constants import EventTypes
 from synapse.api.room_versions import RoomVersions
@@ -200,6 +201,7 @@ def default_config(
             "per_user": {"per_second": 10000, "burst_count": 10000},
         },
         "rc_3pid_validation": {"per_second": 10000, "burst_count": 10000},
+        "rc_presence": {"per_user": {"per_second": 10000, "burst_count": 10000}},
         "saml2_enabled": False,
         "public_baseurl": None,
         "default_identity_server": None,
@@ -399,11 +401,24 @@ class TestTimeout(Exception):
 
 
 class test_timeout:
+    """
+    FIXME: This implementation is not robust against other code tight-looping and
+    preventing the signals propagating and timing out the test. You may need to add
+    `time.sleep(0.1)` to your code in order to allow this timeout to work correctly.
+
+    ```py
+    with test_timeout(3):
+        while True:
+            my_checking_func()
+            time.sleep(0.1)
+    ```
+    """
+
     def __init__(self, seconds: int, error_message: Optional[str] = None) -> None:
-        if error_message is None:
-            error_message = "test timed out after {}s.".format(seconds)
+        self.error_message = f"Test timed out after {seconds}s"
+        if error_message is not None:
+            self.error_message += f": {error_message}"
         self.seconds = seconds
-        self.error_message = error_message
 
     def handle_timeout(self, signum: int, frame: Optional[FrameType]) -> None:
         raise TestTimeout(self.error_message)