Add changelog

.ci/before_build_wheel.sh

@@ -7,4 +7,4 @@ if command -v yum &> /dev/null; then
 fi
 
 # Install a Rust toolchain
-curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain stable -y --profile minimal
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.82.0 -y --profile minimal

.ci/scripts/auditwheel_wrapper.py

@@ -0,0 +1,147 @@
+#!/usr/bin/env python
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# 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]
+#
+#
+
+# Wraps `auditwheel repair` to first check if we're repairing a potentially abi3
+# compatible wheel, if so rename the wheel before repairing it.
+
+import argparse
+import os
+import subprocess
+from typing import Optional
+from zipfile import ZipFile
+
+from packaging.tags import Tag
+from packaging.utils import parse_wheel_filename
+from packaging.version import Version
+
+
+def check_is_abi3_compatible(wheel_file: str) -> None:
+    """Check the contents of the built wheel for any `.so` files that are *not*
+    abi3 compatible.
+    """
+
+    with ZipFile(wheel_file, "r") as wheel:
+        for file in wheel.namelist():
+            if not file.endswith(".so"):
+                continue
+
+            if not file.endswith(".abi3.so"):
+                raise Exception(f"Found non-abi3 lib: {file}")
+
+
+def cpython(wheel_file: str, name: str, version: Version, tag: Tag) -> str:
+    """Replaces the cpython wheel file with a ABI3 compatible wheel"""
+
+    if tag.abi == "abi3":
+        # Nothing to do.
+        return wheel_file
+
+    check_is_abi3_compatible(wheel_file)
+
+    # HACK: it seems that some older versions of pip will consider a wheel marked
+    # as macosx_11_0 as incompatible with Big Sur. I haven't done the full archaeology
+    # here; there are some clues in
+    #     https://github.com/pantsbuild/pants/pull/12857
+    #     https://github.com/pypa/pip/issues/9138
+    #     https://github.com/pypa/packaging/pull/319
+    # Empirically this seems to work, note that macOS 11 and 10.16 are the same,
+    # both versions are valid for backwards compatibility.
+    platform = tag.platform.replace("macosx_11_0", "macosx_10_16")
+    abi3_tag = Tag(tag.interpreter, "abi3", platform)
+
+    dirname = os.path.dirname(wheel_file)
+    new_wheel_file = os.path.join(
+        dirname,
+        f"{name}-{version}-{abi3_tag}.whl",
+    )
+
+    os.rename(wheel_file, new_wheel_file)
+
+    print("Renamed wheel to", new_wheel_file)
+
+    return new_wheel_file
+
+
+def main(wheel_file: str, dest_dir: str, archs: Optional[str]) -> None:
+    """Entry point"""
+
+    # Parse the wheel file name into its parts. Note that `parse_wheel_filename`
+    # normalizes the package name (i.e. it converts matrix_synapse ->
+    # matrix-synapse), which is not what we want.
+    _, version, build, tags = parse_wheel_filename(os.path.basename(wheel_file))
+    name = os.path.basename(wheel_file).split("-")[0]
+
+    if len(tags) != 1:
+        # We expect only a wheel file with only a single tag
+        raise Exception(f"Unexpectedly found multiple tags: {tags}")
+
+    tag = next(iter(tags))
+
+    if build:
+        # We don't use build tags in Synapse
+        raise Exception(f"Unexpected build tag: {build}")
+
+    # If the wheel is for cpython then convert it into an abi3 wheel.
+    if tag.interpreter.startswith("cp"):
+        wheel_file = cpython(wheel_file, name, version, tag)
+
+    # Finally, repair the wheel.
+    if archs is not None:
+        # If we are given archs then we are on macos and need to use
+        # `delocate-listdeps`.
+        subprocess.run(["delocate-listdeps", wheel_file], check=True)
+        subprocess.run(
+            ["delocate-wheel", "--require-archs", archs, "-w", dest_dir, wheel_file],
+            check=True,
+        )
+    else:
+        subprocess.run(["auditwheel", "repair", "-w", dest_dir, wheel_file], check=True)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Tag wheel as abi3 and repair it.")
+
+    parser.add_argument(
+        "--wheel-dir",
+        "-w",
+        metavar="WHEEL_DIR",
+        help="Directory to store delocated wheels",
+        required=True,
+    )
+
+    parser.add_argument(
+        "--require-archs",
+        metavar="archs",
+        default=None,
+    )
+
+    parser.add_argument(
+        "wheel_file",
+        metavar="WHEEL_FILE",
+    )
+
+    args = parser.parse_args()
+
+    wheel_file = args.wheel_file
+    wheel_dir = args.wheel_dir
+    archs = args.require_archs
+
+    main(wheel_file, wheel_dir, archs)

.ci/scripts/calculate_jobs.py

@@ -35,55 +35,46 @@ IS_PR = os.environ["GITHUB_REF"].startswith("refs/pull/")
 
 # First calculate the various trial jobs.
 #
-# For PRs, we only run each type of test with the oldest and newest Python
-# version that's supported. The oldest version ensures we don't accidentally
-# introduce syntax or code that's too new, and the newest ensures we don't use
-# code that's been dropped in the latest supported Python version.
+# For PRs, we only run each type of test with the oldest Python version supported (which
+# is Python 3.10 right now)
 
 trial_sqlite_tests = [
     {
         "python-version": "3.10",
         "database": "sqlite",
         "extras": "all",
-    },
-    {
-        "python-version": "3.14",
-        "database": "sqlite",
-        "extras": "all",
-    },
+    }
 ]
 
 if not IS_PR:
-    # Otherwise, check all supported Python versions.
-    #
-    # Avoiding running all of these versions on every PR saves on CI time.
     trial_sqlite_tests.extend(
         {
             "python-version": version,
             "database": "sqlite",
             "extras": "all",
         }
-        for version in ("3.11", "3.12", "3.13")
+        for version in ("3.11", "3.12", "3.13", "3.14")
     )
 
-# Only test postgres against the earliest and latest Python versions that we
-# support in order to save on CI time.
 trial_postgres_tests = [
     {
         "python-version": "3.10",
         "database": "postgres",
-        "postgres-version": "14",
+        "postgres-version": "13",
         "extras": "all",
-    },
-    {
-        "python-version": "3.14",
-        "database": "postgres",
-        "postgres-version": "17",
-        "extras": "all",
-    },
+    }
 ]
 
-# Ensure that Synapse passes unit tests even with no extra dependencies installed.
+if not IS_PR:
+    trial_postgres_tests.append(
+        {
+            "python-version": "3.14",
+            "database": "postgres",
+            "postgres-version": "17",
+            "extras": "all",
+        }
+    )
+
 trial_no_extra_tests = [
     {
         "python-version": "3.10",

.ci/scripts/prepare_old_deps.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# this script is run by GitHub Actions in a plain `jammy` container; it
+# - installs the minimal system requirements, and poetry;
+# - patches the project definition file to refer to old versions only;
+# - creates a venv with these old versions using poetry; and finally
+# - invokes `trial` to run the tests with old deps.
+
+set -ex
+
+# Prevent virtualenv from auto-updating pip to an incompatible version
+export VIRTUALENV_NO_DOWNLOAD=1
+
+# TODO: in the future, we could use an implementation of
+#   https://github.com/python-poetry/poetry/issues/3527
+#   https://github.com/pypa/pip/issues/8085
+# to select the lowest possible versions, rather than resorting to this sed script.
+
+# Patch the project definitions in-place:
+# - Replace all lower and tilde bounds with exact bounds
+# - Replace all caret bounds---but not the one that defines the supported Python version!
+# - Delete all lines referring to psycopg2 --- so no testing of postgres support.
+# - Use pyopenssl 17.0, which is the oldest version that works with
+#   a `cryptography` compiled against OpenSSL 1.1.
+# - Omit systemd: we're not logging to journal here.
+
+sed -i \
+   -e "s/[~>]=/==/g" \
+   -e '/^python = "^/!s/\^/==/g' \
+   -e "/psycopg2/d" \
+   -e 's/pyOpenSSL = "==16.0.0"/pyOpenSSL = "==17.0.0"/' \
+   -e '/systemd/d' \
+   pyproject.toml
+
+echo "::group::Patched pyproject.toml"
+cat pyproject.toml
+echo "::endgroup::"

.git-blame-ignore-revs

@@ -26,8 +26,3 @@ c4268e3da64f1abb5b31deaeb5769adb6510c0a7
 # Update black to 23.1.0 (https://github.com/matrix-org/synapse/pull/15103)
 9bb2eac71962970d02842bca441f4bcdbbf93a11
 
-# Use type hinting generics in standard collections (https://github.com/element-hq/synapse/pull/19046)
-fc244bb592aa481faf28214a2e2ce3bb4e95d990
-
-# Write union types as X | Y where possible (https://github.com/element-hq/synapse/pull/19111)
-fcac7e0282b074d4bd3414d1c9c181e9701875d9

.gitattributes

@@ -1 +0,0 @@
-.github/workflows/* merge=ours

.github/dependabot.yml

@@ -1,92 +1,23 @@
 version: 2
-# As dependabot is currently only run on a weekly basis, we raise the
-# open-pull-requests-limit to 10 (from the default of 5) to better ensure we
-# don't continuously grow a backlog of updates.
 updates:
   - # "pip" is the correct setting for poetry, per https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#package-ecosystem
     package-ecosystem: "pip"
     directory: "/"
-    open-pull-requests-limit: 10
     schedule:
       interval: "weekly"
-    # Group patch updates to packages together into a single PR, as they rarely
-    # if ever contain breaking changes that need to be reviewed separately.
-    # 
-    # Less PRs means a streamlined review process.
-    #
-    # Python packages follow semantic versioning, and tend to only introduce
-    # breaking changes in major version bumps. Thus, we'll group minor and patch
-    # versions together.
-    groups:
-      minor-and-patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "minor"
-          - "patch"
-    # Prevent pulling packages that were recently updated to help mitigate
-    # supply chain attacks. 14 days was taken from the recommendation at
-    # https://blog.yossarian.net/2025/11/21/We-should-all-be-using-dependency-cooldowns
-    # where the author noted that 9/10 attacks would have been mitigated by a
-    # two week cooldown.
-    #
-    # The cooldown only applies to general updates; security updates will still
-    # be pulled in as soon as possible.
-    cooldown:
-      default-days: 14
 
   - package-ecosystem: "docker"
     directory: "/docker"
-    open-pull-requests-limit: 10
     schedule:
       interval: "weekly"
-    # For container versions, breaking changes are also typically only introduced in major
-    # package bumps.
-    groups:
-      minor-and-patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "minor"
-          - "patch"
-    cooldown:
-      default-days: 14
 
   - package-ecosystem: "github-actions"
     directory: "/"
-    open-pull-requests-limit: 10
     schedule:
       interval: "weekly"
-    # Similarly for GitHub Actions, breaking changes are typically only introduced in major
-    # package bumps.
-    groups:
-      minor-and-patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "minor"
-          - "patch"
-    cooldown:
-      default-days: 14
 
   - package-ecosystem: "cargo"
     directory: "/"
-    open-pull-requests-limit: 10
     versioning-strategy: "lockfile-only"
     schedule:
       interval: "weekly"
-    # The Rust ecosystem is special in that breaking changes are often introduced
-    # in minor version bumps, as packages typically stay pre-1.0 for a long time.
-    # Thus we specifically keep minor version bumps separate in their own PRs.
-    groups:
-      patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "patch"
-    cooldown:
-      default-days: 14

.github/workflows/docker.yml

@@ -0,0 +1,155 @@
+# GitHub actions workflow which builds and publishes the docker images.
+
+name: Build docker images
+
+on:
+  push:
+    tags: ["v*"]
+    branches: [master, main, develop]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  packages: write
+  id-token: write # needed for signing the images with GitHub OIDC Token
+jobs:
+  build:
+    name: Build and push image for ${{ matrix.platform }}
+    runs-on: ${{ matrix.runs_on }}
+    strategy:
+      matrix:
+        include:
+          - platform: linux/amd64
+            runs_on: ubuntu-24.04
+            suffix: linux-amd64
+          - platform: linux/arm64
+            runs_on: ubuntu-24.04-arm
+            suffix: linux-arm64
+    steps:
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+      - name: Checkout repository
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Extract version from pyproject.toml
+        # Note: explicitly requesting bash will mean bash is invoked with `-eo pipefail`, see
+        # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsshell
+        shell: bash
+        run: |
+          echo "SYNAPSE_VERSION=$(grep "^version" pyproject.toml | sed -E 's/version\s*=\s*["]([^"]*)["]/\1/')" >> $GITHUB_ENV
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Log in to GHCR
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        with:
+          push: true
+          labels: |
+            gitsha1=${{ github.sha }}
+            org.opencontainers.image.version=${{ env.SYNAPSE_VERSION }}
+          tags: |
+            docker.io/matrixdotorg/synapse
+            ghcr.io/element-hq/synapse
+          file: "docker/Dockerfile"
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        run: |
+          mkdir -p ${{ runner.temp }}/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "${{ runner.temp }}/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v5
+        with:
+          name: digests-${{ matrix.suffix }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    name: Push merged images to ${{ matrix.repository }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        repository:
+          - docker.io/matrixdotorg/synapse
+          - ghcr.io/element-hq/synapse
+
+    needs:
+      - build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
+        with:
+          path: ${{ runner.temp }}/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Log in to DockerHub
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        if: ${{ startsWith(matrix.repository, 'docker.io') }}
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Log in to GHCR
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        if: ${{ startsWith(matrix.repository, 'ghcr.io') }}
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+
+      - name: Install Cosign
+        uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
+
+      - name: Calculate docker image tag
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
+        with:
+          images: ${{ matrix.repository }}
+          flavor: |
+            latest=false
+          tags: |
+            type=raw,value=develop,enable=${{ github.ref == 'refs/heads/develop' }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/master' }}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+            type=pep440,pattern={{raw}}
+            type=sha
+
+      - name: Create manifest list and push
+        working-directory: ${{ runner.temp }}/digests
+        env:
+          REPOSITORY: ${{ matrix.repository }}
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf "$REPOSITORY@sha256:%s " *)
+
+      - name: Sign each manifest
+        env:
+          REPOSITORY: ${{ matrix.repository }}
+        run: |
+          DIGESTS=""
+          for TAG in $(echo "$DOCKER_METADATA_OUTPUT_JSON" | jq -r '.tags[]'); do
+            DIGEST="$(docker buildx imagetools inspect $TAG --format '{{json .Manifest}}' | jq -r '.digest')"
+            DIGESTS="$DIGESTS $REPOSITORY@$DIGEST"
+          done
+          cosign sign --yes $DIGESTS

.github/workflows/docs-pr-netlify.yaml

@@ -0,0 +1,34 @@
+name: Deploy documentation PR preview
+
+on:
+  workflow_run:
+    workflows: [ "Prepare documentation PR preview" ]
+    types:
+      - completed
+
+jobs:
+  netlify:
+    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      # 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@ac66b43f0e6a346234dd65d4d0c8fbb31cb316e5 # v11
+        with:
+          workflow: docs-pr.yaml
+          run_id: ${{ github.event.workflow_run.id }}
+          name: book
+          path: book
+
+      - name: 📤 Deploy to Netlify
+        uses: matrix-org/netlify-pr-preview@9805cd123fc9a7e421e35340a05e1ebc5dee46b5 # v3
+        with:
+          path: book
+          owner: ${{ github.event.workflow_run.head_repository.owner.login }}
+          branch: ${{ github.event.workflow_run.head_branch }}
+          revision: ${{ github.event.workflow_run.head_sha }}
+          token: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+          site_id: ${{ secrets.NETLIFY_SITE_ID }}
+          desc: Documentation preview
+          deployment_env: PR Documentation Preview

.github/workflows/docs-pr.yaml

@@ -0,0 +1,71 @@
+name: Prepare documentation PR preview
+
+on:
+  pull_request:
+    paths:
+      - docs/**
+      - book.toml
+      - .github/workflows/docs-pr.yaml
+      - scripts-dev/schema_versions.py
+
+jobs:
+  pages:
+    name: GitHub Pages
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          # Fetch all history so that the schema_versions script works.
+          fetch-depth: 0
+
+      - name: Setup mdbook
+        uses: peaceiris/actions-mdbook@ee69d230fe19748b7abf22df32acaa93833fad08 # v2.0.0
+        with:
+          mdbook-version: '0.4.17'
+
+      - name: Setup python
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+
+      - run: "pip install 'packaging>=20.0' 'GitPython>=3.1.20'"
+
+      - name: Build the documentation
+        # mdbook will only create an index.html if we're including docs/README.md in SUMMARY.md.
+        # However, we're using docs/README.md for other purposes and need to pick a new page
+        # as the default. Let's opt for the welcome page instead.
+        run: |
+          mdbook build
+          cp book/welcome_and_overview.html book/index.html
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: book
+          path: book
+          # We'll only use this in a workflow_run, then we're done with it
+          retention-days: 1
+
+  link-check:
+    name: Check links in documentation
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Setup mdbook
+        uses: peaceiris/actions-mdbook@ee69d230fe19748b7abf22df32acaa93833fad08 # v2.0.0
+        with:
+          mdbook-version: '0.4.17'
+
+      - name: Setup htmltest
+        run: |
+          wget https://github.com/wjdp/htmltest/releases/download/v0.17.0/htmltest_0.17.0_linux_amd64.tar.gz
+          echo '775c597ee74899d6002cd2d93076f897f4ba68686bceabe2e5d72e84c57bc0fb  htmltest_0.17.0_linux_amd64.tar.gz' | sha256sum -c
+          tar zxf htmltest_0.17.0_linux_amd64.tar.gz
+
+      - name: Test links with htmltest
+        # Build the book with `./` as the site URL (to make checks on 404.html possible)
+        # Then run htmltest (without checking external links since that involves the network and is slow).
+        run: |
+          MDBOOK_OUTPUT__HTML__SITE_URL="./" mdbook build
+          ./htmltest book --skip-external

.github/workflows/docs.yaml

@@ -0,0 +1,99 @@
+name: Deploy the documentation
+
+on:
+  push:
+    branches:
+      # For bleeding-edge documentation
+      - develop
+      # For documentation specific to a release
+      - 'release-v*'
+      # stable docs
+      - master
+
+  workflow_dispatch:
+
+jobs:
+  pre:
+    name: Calculate variables for GitHub Pages deployment
+    runs-on: ubuntu-latest
+    steps:
+      # Figure out the target directory.
+      #
+      # The target directory depends on the name of the branch
+      #
+      - name: Get the target directory name
+        id: vars
+        run: |
+          # first strip the 'refs/heads/' prefix with some shell foo
+          branch="${GITHUB_REF#refs/heads/}"
+
+          case $branch in
+              release-*)
+                  # strip 'release-' from the name for release branches.
+                  branch="${branch#release-}"
+                  ;;
+              master)
+                  # deploy to "latest" for the master branch.
+                  branch="latest"
+                  ;;
+          esac
+
+          # finally, set the 'branch-version' var.
+          echo "branch-version=$branch" >> "$GITHUB_OUTPUT"
+    outputs:
+      branch-version: ${{ steps.vars.outputs.branch-version }}
+
+################################################################################
+  pages-docs:
+    name: GitHub Pages
+    runs-on: ubuntu-latest
+    needs:
+      - pre
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          # Fetch all history so that the schema_versions script works.
+          fetch-depth: 0
+
+      - name: Setup mdbook
+        uses: peaceiris/actions-mdbook@ee69d230fe19748b7abf22df32acaa93833fad08 # v2.0.0
+        with:
+          mdbook-version: '0.4.17'
+
+      - name: Set version of docs
+        run: echo 'window.SYNAPSE_VERSION = "${{ needs.pre.outputs.branch-version }}";' > ./docs/website_files/version.js
+
+      - name: Setup python
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+
+      - run: "pip install 'packaging>=20.0' 'GitPython>=3.1.20'"
+
+      - name: Build the documentation
+        # mdbook will only create an index.html if we're including docs/README.md in SUMMARY.md.
+        # However, we're using docs/README.md for other purposes and need to pick a new page
+        # as the default. Let's opt for the welcome page instead.
+        run: |
+          mdbook build
+          cp book/welcome_and_overview.html book/index.html
+
+      - name: Prepare and publish schema files
+        run: |
+          sudo apt-get update && sudo apt-get install -y yq
+          mkdir -p book/schema
+          # Remove developer notice before publishing.
+          rm schema/v*/Do\ not\ edit\ files\ in\ this\ folder
+          # Copy schema files that are independent from current Synapse version.
+          cp -r -t book/schema schema/v*/
+          # Convert config schema from YAML source file to JSON.
+          yq < schema/synapse-config.schema.yaml \
+            > book/schema/synapse-config.schema.json
+
+      # Deploy to the target directory.
+      - name: Deploy to gh pages
+        uses: peaceiris/actions-gh-pages@4f9cc6602d3f66b9c108549d475ec49e8ef4d45e # v4.0.0
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./book
+          destination_dir: ./${{ needs.pre.outputs.branch-version }}

.github/workflows/fix_lint.yaml

@@ -0,0 +1,52 @@
+# A helper workflow to automatically fixup any linting errors on a PR. Must be
+# triggered manually.
+
+name: Attempt to automatically fix linting errors
+
+on:
+  workflow_dispatch:
+
+env:
+  # We use nightly so that `fmt` correctly groups together imports, and
+  # clippy correctly fixes up the benchmarks.
+  RUST_VERSION: nightly-2025-06-24
+
+jobs:
+  fixup:
+    name: Fix up
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+          components: clippy, rustfmt
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Setup Poetry
+        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
+        run: poetry run ruff check --fix .
+
+      - name: Run ruff format
+        continue-on-error: true
+        run: poetry run ruff format --quiet .
+
+      - run: cargo clippy --all-features --fix -- -D warnings
+        continue-on-error: true
+
+      - run: cargo fmt
+        continue-on-error: true
+
+      - uses: stefanzweifel/git-auto-commit-action@28e16e81777b558cc906c8750092100bbb34c5e3 # v7.0.0
+        with:
+          commit_message: "Attempt to fix linting"

.github/workflows/latest_deps.yml

@@ -0,0 +1,243 @@
+# People who are freshly `pip install`ing from PyPI will pull in the latest versions of
+# dependencies which match the broad requirements. Since most CI runs are against
+# the locked poetry environment, run specifically against the latest dependencies to
+# know if there's an upcoming breaking change.
+#
+# As an overview this workflow:
+# - checks out develop,
+# - installs from source, pulling in the dependencies like a fresh `pip install` would, and
+# - runs mypy and test suites in that checkout.
+#
+# Based on the twisted trunk CI job.
+
+name: Latest dependencies
+
+on:
+  schedule:
+    - cron: 0 7 * * *
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  RUST_VERSION: 1.87.0
+
+jobs:
+  check_repo:
+    # Prevent this workflow from running on any fork of Synapse other than element-hq/synapse, as it is
+    # only useful to the Synapse core team.
+    # All other workflow steps depend on this one, thus if 'should_run_workflow' is not 'true', the rest
+    # of the workflow will be skipped as well.
+    runs-on: ubuntu-latest
+    outputs:
+      should_run_workflow: ${{ steps.check_condition.outputs.should_run_workflow }}
+    steps:
+      - id: check_condition
+        run: echo "should_run_workflow=${{ github.repository == 'element-hq/synapse' }}" >> "$GITHUB_OUTPUT"
+
+  mypy:
+    needs: check_repo
+    if: needs.check_repo.outputs.should_run_workflow == 'true'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      # 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@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          python-version: "3.x"
+          poetry-version: "2.1.1"
+          extras: "all"
+      # Dump installed versions for debugging.
+      - run: poetry run pip list > before.txt
+      # Upgrade all runtime dependencies only. This is intended to mimic a fresh
+      # `pip install matrix-synapse[all]` as closely as possible.
+      - run: poetry update --without dev
+      - run: poetry run pip list > after.txt && (diff -u before.txt after.txt || true)
+      - name: Remove unhelpful options from mypy config
+        run: sed -e '/warn_unused_ignores = True/d' -e '/warn_redundant_casts = True/d' -i mypy.ini
+      - run: poetry run mypy
+  trial:
+    needs: check_repo
+    if: needs.check_repo.outputs.should_run_workflow == 'true'
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - database: "sqlite"
+          - database: "postgres"
+            postgres-version: "14"
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - run: sudo apt-get -qq install xmlsec1
+      - name: Set up PostgreSQL ${{ matrix.postgres-version }}
+        if: ${{ matrix.postgres-version }}
+        run: |
+          docker run -d -p 5432:5432 \
+            -e POSTGRES_PASSWORD=postgres \
+            -e POSTGRES_INITDB_ARGS="--lc-collate C --lc-ctype C --encoding UTF8" \
+            postgres:${{ matrix.postgres-version }}
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - run: pip install .[all,test]
+      - name: Await PostgreSQL
+        if: ${{ matrix.postgres-version }}
+        timeout-minutes: 2
+        run: until pg_isready -h localhost; do sleep 1; done
+
+      # We nuke the local copy, as we've installed synapse into the virtualenv
+      # (rather than use an editable install, which we no longer support). If we
+      # don't do this then python can't find the native lib.
+      - run: rm -rf synapse/
+
+      - run: python -m twisted.trial --jobs=2 tests
+        env:
+          SYNAPSE_POSTGRES: ${{ matrix.database == 'postgres' || '' }}
+          SYNAPSE_POSTGRES_HOST: localhost
+          SYNAPSE_POSTGRES_USER: postgres
+          SYNAPSE_POSTGRES_PASSWORD: postgres
+      - name: Dump logs
+        # Logs are most useful when the command fails, always include them.
+        if: ${{ always() }}
+        # Note: Dumps to workflow logs instead of using actions/upload-artifact
+        #       This keeps logs colocated with failing jobs
+        #       It also ignores find's exit code; this is a best effort affair
+        run: >-
+          find _trial_temp -name '*.log'
+          -exec echo "::group::{}" \;
+          -exec cat {} \;
+          -exec echo "::endgroup::" \;
+          || true
+
+
+  sytest:
+    needs: check_repo
+    if: needs.check_repo.outputs.should_run_workflow == 'true'
+    runs-on: ubuntu-latest
+    container:
+      image: matrixdotorg/sytest-synapse:testing
+      volumes:
+        - ${{ github.workspace }}:/src
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - sytest-tag: bookworm
+
+          - sytest-tag: bookworm
+            postgres: postgres
+            workers: workers
+            redis: redis
+    env:
+      POSTGRES: ${{ matrix.postgres && 1}}
+      WORKERS: ${{ matrix.workers && 1 }}
+      REDIS: ${{ matrix.redis && 1 }}
+      BLACKLIST: ${{ matrix.workers && 'synapse-blacklist-with-workers' }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Ensure sytest runs `pip install`
+        # Delete the lockfile so sytest will `pip install` rather than `poetry install`
+        run: rm /src/poetry.lock
+        working-directory: /src
+      - name: Prepare test blacklist
+        run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
+      - name: Run SyTest
+        run: /bootstrap.sh synapse
+        working-directory: /src
+      - name: Summarise results.tap
+        if: ${{ always() }}
+        run: /sytest/scripts/tap_to_gha.pl /logs/results.tap
+      - name: Upload SyTest logs
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        if: ${{ always() }}
+        with:
+          name: Sytest Logs - ${{ job.status }} - (${{ join(matrix.*, ', ') }})
+          path: |
+            /logs/results.tap
+            /logs/**/*.log*
+
+
+  complement:
+    needs: check_repo
+    if: "!failure() && !cancelled() && needs.check_repo.outputs.should_run_workflow == 'true'"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arrangement: monolith
+            database: SQLite
+
+          - arrangement: monolith
+            database: Postgres
+
+          - arrangement: workers
+            database: Postgres
+
+    steps:
+      - name: Check out synapse codebase
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          path: synapse
+
+      - name: Prepare Complement's Prerequisites
+        run: synapse/.ci/scripts/setup_complement_prerequisites.sh
+
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+        with:
+          cache-dependency-path: complement/go.sum
+          go-version-file: complement/go.mod
+
+      - run: |
+          set -o pipefail
+          TEST_ONLY_IGNORE_POETRY_LOCKFILE=1 POSTGRES=${{ (matrix.database == 'Postgres') && 1 || '' }} WORKERS=${{ (matrix.arrangement == 'workers') && 1 || '' }} COMPLEMENT_DIR=`pwd`/complement synapse/scripts-dev/complement.sh -json 2>&1 | synapse/.ci/scripts/gotestfmt
+        shell: bash
+        name: Run Complement Tests
+
+  # Open an issue if the build fails, so we know about it.
+  # Only do this if we're not experimenting with this action in a PR.
+  open-issue:
+    if: "failure() && github.event_name != 'push' && github.event_name != 'pull_request' && needs.check_repo.outputs.should_run_workflow == 'true'"
+    needs:
+      # TODO: should mypy be included here? It feels more brittle than the others.
+      - mypy
+      - trial
+      - sytest
+      - complement
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          update_existing: true
+          filename: .ci/latest_deps_build_failed_issue_template.md

.github/workflows/poetry_lockfile.yaml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches: ["develop", "release-*"]
+    paths:
+      - poetry.lock
+  pull_request:
+    paths:
+      - poetry.lock
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-sdists:
+    name: "Check locked dependencies have sdists"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: '3.x'
+      - run: pip install tomli
+      - run: ./scripts-dev/check_locked_deps_have_sdists.py

.github/workflows/push_complement_image.yml

@@ -0,0 +1,74 @@
+# This task does not run complement tests, see tests.yaml instead.
+# This task does not build docker images for synapse for use on docker hub, see docker.yaml instead
+
+name: Store complement-synapse image in ghcr.io
+on:
+  push:
+    branches: [ "master" ]
+  schedule:
+    - cron: '0 5 * * *'
+  workflow_dispatch:
+    inputs:
+      branch:
+        required: true
+        default: 'develop'
+        type: choice
+        options:
+          - develop
+          - master
+
+# Only run this action once per pull request/branch; restart if a new commit arrives.
+# C.f. https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#concurrency
+# and https://docs.github.com/en/actions/reference/context-and-expression-syntax-for-github-actions#github-context
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build and push complement image
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout specific branch (debug build)
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        if: github.event_name == 'workflow_dispatch'
+        with:
+          ref: ${{ inputs.branch }}
+      - name: Checkout clean copy of develop (scheduled build)
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        if: github.event_name == 'schedule'
+        with:
+          ref: develop
+      - name: Checkout clean copy of master (on-push)
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        if: github.event_name == 'push'
+        with:
+          ref: master
+      - name: Login to registry
+        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Work out labels for complement image
+        id: meta
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
+        with:
+          images: ghcr.io/${{ github.repository }}/complement-synapse
+          tags: |
+            type=schedule,pattern=nightly,enable=${{ github.event_name == 'schedule'}}
+            type=raw,value=develop,enable=${{ github.event_name == 'schedule' || inputs.branch == 'develop' }}
+            type=raw,value=latest,enable=${{ github.event_name == 'push' || inputs.branch == 'master' }}
+            type=sha,format=long
+      - name: Run scripts-dev/complement.sh to generate complement-synapse:latest image.
+        run: scripts-dev/complement.sh --build-only
+      - name: Tag and push generated image
+        run: |
+          for TAG in ${{ join(fromJson(steps.meta.outputs.json).tags, ' ') }}; do 
+            echo "tag and push $TAG"
+            docker tag complement-synapse $TAG
+            docker push $TAG
+          done

.github/workflows/release-artifacts.yml

@@ -0,0 +1,210 @@
+# GitHub actions workflow which builds the release artifacts.
+
+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 macOS & ARM.
+  pull_request:
+  push:
+    branches: ["develop", "release-*"]
+
+    # we do the full build on tags.
+    tags: ["v*"]
+  merge_group:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+
+jobs:
+  get-distros:
+    name: "Calculate list of debian distros"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - id: set-distros
+        run: |
+          # if we're running from a tag, get the full list of distros; otherwise just use debian:sid
+          # NOTE: inside the actual Dockerfile-dhvirtualenv, the image name is expanded into its full image path
+          dists='["debian:sid"]'
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+              dists=$(scripts-dev/build_debian_packages.py --show-dists-json)
+          fi
+          echo "distros=$dists" >> "$GITHUB_OUTPUT"
+    # map the step outputs to job outputs
+    outputs:
+      distros: ${{ steps.set-distros.outputs.distros }}
+
+  # now build the packages with a matrix build.
+  build-debs:
+    needs: get-distros
+    name: "Build .deb packages"
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        distro: ${{ fromJson(needs.get-distros.outputs.distros) }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          path: src
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        with:
+          install: true
+
+      - name: Set up docker layer caching
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
+      - name: Set up python
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+
+      - name: Build the packages
+        # see https://github.com/docker/build-push-action/issues/252
+        # for the cache magic here
+        run: |
+          ./src/scripts-dev/build_debian_packages.py \
+            --docker-build-arg=--cache-from=type=local,src=/tmp/.buildx-cache \
+            --docker-build-arg=--cache-to=type=local,mode=max,dest=/tmp/.buildx-cache-new \
+            --docker-build-arg=--progress=plain \
+            --docker-build-arg=--load \
+            "${{ matrix.distro }}"
+          rm -rf /tmp/.buildx-cache
+          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+
+      - name: Artifact name
+        id: artifact-name
+        # We can't have colons in the upload name of the artifact, so we convert
+        # e.g. `debian:sid` to `sid`.
+        env:
+          DISTRO: ${{ matrix.distro }}
+        run: |
+          echo "ARTIFACT_NAME=${DISTRO#*:}" >> "$GITHUB_OUTPUT"
+
+      - name: Upload debs as artifacts
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: debs-${{ steps.artifact-name.outputs.ARTIFACT_NAME }}
+          path: debs/*
+
+  build-wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-24.04
+          - ubuntu-24.04-arm
+          - macos-14 # This uses arm64
+          - macos-15-intel # This uses x86-64
+        # 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.
+        is_pr:
+          - ${{ startsWith(github.ref, 'refs/pull/') }}
+
+        exclude:
+          # Don't build macos wheels on PR CI.
+          - is_pr: true
+            os: "macos-15-intel"
+          - is_pr: true
+            os: "macos-14"
+          # Don't build aarch64 wheels on PR CI.
+          - is_pr: true
+            os: "ubuntu-24.04-arm"
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        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==3.0.0
+
+      - name: Only build a single wheel on PR
+        if: startsWith(github.ref, 'refs/pull/')
+        run: echo "CIBW_BUILD="cp310-manylinux_*"" >> $GITHUB_ENV
+
+      - name: Build wheels
+        run: python -m cibuildwheel --output-dir wheelhouse
+        env:
+          # Skip testing for platforms which various libraries don't have wheels
+          # for, and so need extra build deps.
+          CIBW_TEST_SKIP: pp3*-* *i686* *musl*
+
+      - uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: Wheel-${{ matrix.os }}
+          path: ./wheelhouse/*.whl
+
+  build-sdist:
+    name: Build sdist
+    runs-on: ubuntu-latest
+    if: ${{ !startsWith(github.ref, 'refs/pull/') }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.10"
+
+      - run: pip install build
+
+      - name: Build sdist
+        run: python -m build --sdist
+
+      - uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: Sdist
+          path: dist/*.tar.gz
+
+  # if it's a tag, create a release and attach the artifacts to it
+  attach-assets:
+    name: "Attach assets to release"
+    if: ${{ !failure() && !cancelled() && startsWith(github.ref, 'refs/tags/') }}
+    needs:
+      - build-debs
+      - build-wheels
+      - build-sdist
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download all workflow run artifacts
+        uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 # v6.0.0
+      - name: Build a tarball for the debs
+        # We need to merge all the debs uploads into one folder, then compress
+        # that.
+        run: |
+          mkdir debs
+          mv debs*/* debs/
+          tar -cvJf debs.tar.xz debs
+      - name: Attach to release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release upload "${{ github.ref_name }}" \
+            Sdist/* \
+            Wheel*/* \
+            debs.tar.xz \
+            --repo ${{ github.repository }}

.github/workflows/schema.yaml

@@ -0,0 +1,57 @@
+name: Schema
+
+on:
+  pull_request:
+    paths:
+      - schema/**
+      - docs/usage/configuration/config_documentation.md
+  push:
+    branches: ["develop", "release-*"]
+  workflow_dispatch:
+
+jobs:
+  validate-schema:
+    name: Ensure Synapse config schema is valid
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - name: Install check-jsonschema
+        run: pip install check-jsonschema==0.33.0
+
+      - name: Validate meta schema
+        run: check-jsonschema --check-metaschema schema/v*/meta.schema.json
+      - name: Validate schema
+        run: |-
+          # Please bump on introduction of a new meta schema.
+          LATEST_META_SCHEMA_VERSION=v1
+          check-jsonschema \
+            --schemafile="schema/$LATEST_META_SCHEMA_VERSION/meta.schema.json" \
+            schema/synapse-config.schema.yaml
+      - name: Validate default config
+      # Populates the empty instance with default values and checks against the schema.
+        run: |-
+          echo "{}" | check-jsonschema \
+            --fill-defaults --schemafile=schema/synapse-config.schema.yaml -
+
+  check-doc-generation:
+    name: Ensure generated documentation is up-to-date
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - name: Install PyYAML
+        run: pip install PyYAML==6.0.2
+
+      - name: Regenerate config documentation
+        run: |
+          scripts-dev/gen_config_documentation.py \
+            schema/synapse-config.schema.yaml \
+          > docs/usage/configuration/config_documentation.md
+      - name: Error in case of any differences
+      # Errors if there are now any modified files (untracked files are ignored).
+        run: 'git diff --exit-code'

.github/workflows/tests.yml

@@ -0,0 +1,791 @@
+name: Tests
+
+on:
+  push:
+    branches: ["develop", "release-*"]
+  pull_request:
+  merge_group:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  RUST_VERSION: 1.87.0
+
+jobs:
+  # Job to detect what has changed so we don't run e.g. Rust checks on PRs that
+  # don't modify Rust code.
+  changes:
+    runs-on: ubuntu-latest
+    outputs:
+      rust: ${{ !startsWith(github.ref, 'refs/pull/') || steps.filter.outputs.rust }}
+      trial: ${{ !startsWith(github.ref, 'refs/pull/') || steps.filter.outputs.trial }}
+      integration: ${{ !startsWith(github.ref, 'refs/pull/') || steps.filter.outputs.integration }}
+      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@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+      id: filter
+      # We only check on PRs
+      if: startsWith(github.ref, 'refs/pull/')
+      with:
+        filters: |
+          rust:
+            - 'rust/**'
+            - 'Cargo.toml'
+            - 'Cargo.lock'
+            - '.rustfmt.toml'
+            - '.github/workflows/tests.yml'
+
+          trial:
+            - 'synapse/**'
+            - 'tests/**'
+            - 'rust/**'
+            - '.ci/scripts/calculate_jobs.py'
+            - 'Cargo.toml'
+            - 'Cargo.lock'
+            - 'pyproject.toml'
+            - 'poetry.lock'
+            - '.github/workflows/tests.yml'
+
+          integration:
+            - 'synapse/**'
+            - 'rust/**'
+            - 'docker/**'
+            - 'Cargo.toml'
+            - 'Cargo.lock'
+            - 'pyproject.toml'
+            - 'poetry.lock'
+            - 'docker/**'
+            - '.ci/**'
+            - 'scripts-dev/complement.sh'
+            - '.github/workflows/tests.yml'
+
+          linting:
+            - 'synapse/**'
+            - 'docker/**'
+            - 'tests/**'
+            - 'scripts-dev/**'
+            - 'contrib/**'
+            - 'synmark/**'
+            - 'stubs/**'
+            - '.ci/**'
+            - 'mypy.ini'
+            - 'pyproject.toml'
+            - 'poetry.lock'
+            - '.github/workflows/tests.yml'
+
+          linting_readme:
+            - 'README.rst'
+
+  check-sampleconfig:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.linting == 'true' }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          python-version: "3.x"
+          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
+
+  check-schema-delta:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.linting == 'true' }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - run: "pip install 'click==8.1.1' 'GitPython>=3.1.20'"
+      - run: scripts-dev/check_schema_delta.py --force-colors
+
+  check-lockfile:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - run: .ci/scripts/check_lockfile.py
+
+  lint:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.linting == 'true' }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Setup Poetry
+        uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          poetry-version: "2.1.1"
+          install-project: "false"
+
+      - name: Run ruff check
+        run: poetry run ruff check --output-format=github .
+
+      - name: Run ruff format
+        run: poetry run ruff format --check .
+
+  lint-mypy:
+    runs-on: ubuntu-latest
+    name: Typechecking
+    needs: changes
+    if: ${{ needs.changes.outputs.linting == 'true' }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Setup Poetry
+        uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          # We want to make use of type hints in optional dependencies too.
+          extras: all
+          # We have seen odd mypy failures that were resolved when we started
+          # installing the project again:
+          # https://github.com/matrix-org/synapse/pull/15376#issuecomment-1498983775
+          # To make CI green, err towards caution and install the project.
+          install-project: "true"
+          poetry-version: "2.1.1"
+
+      # Cribbed from
+      # https://github.com/AustinScola/mypy-cache-github-action/blob/85ea4f2972abed39b33bd02c36e341b28ca59213/src/restore.ts#L10-L17
+      - name: Restore/persist mypy's cache
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        with:
+          path: |
+            .mypy_cache
+          key: mypy-cache-${{ github.context.sha }}
+          restore-keys: mypy-cache-
+
+      - name: Run mypy
+        run: poetry run mypy
+
+  lint-crlf:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - name: Check line endings
+        run: scripts-dev/check_line_terminators.sh
+
+  lint-newsfile:
+    if: ${{ (github.base_ref == 'develop'  || contains(github.base_ref, 'release-')) && github.actor != 'dependabot[bot]' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
+          fetch-depth: 0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - run: "pip install 'towncrier>=18.6.0rc1'"
+      - run: scripts-dev/check-newsfragment.sh
+        env:
+          PULL_REQUEST_NUMBER: ${{ github.event.number }}
+
+  lint-clippy:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+            components: clippy
+            toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - run: cargo clippy -- -D warnings
+
+  # We also lint against a nightly rustc so that we can lint the benchmark
+  # suite, which requires a nightly compiler.
+  lint-clippy-nightly:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+            toolchain: nightly-2025-04-23
+            components: clippy
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - run: cargo clippy --all-features -- -D warnings
+
+  lint-rust:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Setup Poetry
+        uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          # Install like a normal project from source with all optional dependencies
+          extras: all
+          install-project: "true"
+          poetry-version: "2.1.1"
+
+      - name: Ensure `Cargo.lock` is up to date (no stray changes after install)
+        # The `::error::` syntax is using GitHub Actions' error annotations, see
+        # https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions
+        run: |
+          if git diff --quiet Cargo.lock; then
+            echo "Cargo.lock is up to date"
+          else
+            echo "::error::Cargo.lock has uncommitted changes after install. Please run 'poetry install --extras all' and commit the Cargo.lock changes."
+            git diff --exit-code Cargo.lock
+            exit 1
+          fi
+
+  # This job is split from `lint-rust` because it requires a nightly Rust toolchain
+  # for some of the unstable options we use in `.rustfmt.toml`.
+  lint-rustfmt:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          # We use nightly so that we can use some unstable options that we use in
+          # `.rustfmt.toml`.
+          toolchain: nightly-2025-04-23
+          components: rustfmt
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - run: cargo fmt --check
+
+  # This is to detect issues with the rst file, which can otherwise cause issues
+  # when uploading packages to PyPi.
+  lint-readme:
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.linting_readme == 'true' }}
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - run: "pip install rstcheck"
+      - run: "rstcheck --report-level=WARNING README.rst"
+
+  # Dummy step to gate other tests on without repeating the whole list
+  linting-done:
+    if: ${{ !cancelled() }} # Run this even if prior jobs were skipped
+    needs:
+      - lint
+      - lint-mypy
+      - lint-crlf
+      - lint-newsfile
+      - check-sampleconfig
+      - check-schema-delta
+      - check-lockfile
+      - lint-clippy
+      - lint-clippy-nightly
+      - lint-rust
+      - lint-rustfmt
+      - lint-readme
+    runs-on: ubuntu-latest
+    steps:
+      - uses: matrix-org/done-action@3409aa904e8a2aaf2220f09bc954d3d0b0a2ee67 # v3
+        with:
+          needs: ${{ toJSON(needs) }}
+
+          # Various bits are skipped if there was no applicable changes.
+          skippable: |
+            check-sampleconfig
+            check-schema-delta
+            lint
+            lint-mypy
+            lint-newsfile
+            lint-clippy
+            lint-clippy-nightly
+            lint-rust
+            lint-rustfmt
+            lint-readme
+
+
+  calculate-test-jobs:
+    if: ${{ !cancelled() && !failure() }} # Allow previous steps to be skipped, but not fail
+    needs: linting-done
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: "3.x"
+      - id: get-matrix
+        run: .ci/scripts/calculate_jobs.py
+    outputs:
+      trial_test_matrix: ${{ steps.get-matrix.outputs.trial_test_matrix }}
+      sytest_test_matrix: ${{ steps.get-matrix.outputs.sytest_test_matrix }}
+
+  trial:
+    if: ${{ !cancelled() && !failure() && needs.changes.outputs.trial == 'true' }} # Allow previous steps to be skipped, but not fail
+    needs:
+      - calculate-test-jobs
+      - changes
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        job:  ${{ fromJson(needs.calculate-test-jobs.outputs.trial_test_matrix) }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - run: sudo apt-get -qq install xmlsec1
+      - name: Set up PostgreSQL ${{ matrix.job.postgres-version }}
+        if: ${{ matrix.job.postgres-version }}
+        # 1. Mount postgres data files onto a tmpfs in-memory filesystem to reduce overhead of docker's overlayfs layer.
+        # 2. Expose the unix socket for postgres. This removes latency of using docker-proxy for connections.
+        run: |
+          docker run -d -p 5432:5432 \
+            --tmpfs /var/lib/postgres:rw,size=6144m \
+            --mount 'type=bind,src=/var/run/postgresql,dst=/var/run/postgresql' \
+            -e POSTGRES_PASSWORD=postgres \
+            -e POSTGRES_INITDB_ARGS="--lc-collate C --lc-ctype C --encoding UTF8" \
+            postgres:${{ matrix.job.postgres-version }}
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          python-version: ${{ matrix.job.python-version }}
+          poetry-version: "2.1.1"
+          extras: ${{ matrix.job.extras }}
+      - name: Await PostgreSQL
+        if: ${{ matrix.job.postgres-version }}
+        timeout-minutes: 2
+        run: until pg_isready -h localhost; do sleep 1; done
+      - run: poetry run trial --jobs=6 tests
+        env:
+          SYNAPSE_POSTGRES: ${{ matrix.job.database == 'postgres' || '' }}
+          SYNAPSE_POSTGRES_HOST: /var/run/postgresql
+          SYNAPSE_POSTGRES_USER: postgres
+          SYNAPSE_POSTGRES_PASSWORD: postgres
+      - name: Dump logs
+        # Logs are most useful when the command fails, always include them.
+        if: ${{ always() }}
+        # Note: Dumps to workflow logs instead of using actions/upload-artifact
+        #       This keeps logs colocated with failing jobs
+        #       It also ignores find's exit code; this is a best effort affair
+        run: >-
+          find _trial_temp -name '*.log'
+          -exec echo "::group::{}" \;
+          -exec cat {} \;
+          -exec echo "::endgroup::" \;
+          || true
+
+  trial-olddeps:
+    # Note: sqlite only; no postgres
+    if: ${{ !cancelled() && !failure() && needs.changes.outputs.trial == 'true' }} # Allow previous steps to be skipped, but not fail
+    needs:
+      - linting-done
+      - changes
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      # There aren't wheels for some of the older deps, so we need to install
+      # their build dependencies
+      - run: |
+          sudo apt-get -qq update
+          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@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
+        with:
+          python-version: '3.10'
+
+      - name: Prepare old deps
+        if: steps.cache-poetry-old-deps.outputs.cache-hit != 'true'
+        run: .ci/scripts/prepare_old_deps.sh
+
+      # Note: we install using `pip` here, not poetry. `poetry install` ignores the
+      # build-system section (https://github.com/python-poetry/poetry/issues/6154), but
+      # we explicitly want to test that you can `pip install` using the oldest version
+      # of poetry-core and setuptools-rust.
+      - run: pip install .[all,test]
+
+      # We nuke the local copy, as we've installed synapse into the virtualenv
+      # (rather than use an editable install, which we no longer support). If we
+      # don't do this then python can't find the native lib.
+      - run: rm -rf synapse/
+
+      # Sanity check we can import/run Synapse
+      - run: python -m synapse.app.homeserver --help
+
+      - run: python -m twisted.trial -j6 tests
+      - name: Dump logs
+        # Logs are most useful when the command fails, always include them.
+        if: ${{ always() }}
+        # Note: Dumps to workflow logs instead of using actions/upload-artifact
+        #       This keeps logs colocated with failing jobs
+        #       It also ignores find's exit code; this is a best effort affair
+        run: >-
+          find _trial_temp -name '*.log'
+          -exec echo "::group::{}" \;
+          -exec cat {} \;
+          -exec echo "::endgroup::" \;
+          || true
+
+  trial-pypy:
+    # Very slow; only run if the branch name includes 'pypy'
+    # Note: sqlite only; no postgres. Completely untested since poetry move.
+    if: ${{ contains(github.ref, 'pypy') && !failure() && !cancelled() && needs.changes.outputs.trial == 'true' }}
+    needs:
+      - linting-done
+      - changes
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["pypy-3.10"]
+        extras: ["all"]
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      # 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@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          python-version: ${{ matrix.python-version }}
+          poetry-version: "2.1.1"
+          extras: ${{ matrix.extras }}
+      - run: poetry run trial --jobs=2 tests
+      - name: Dump logs
+        # Logs are most useful when the command fails, always include them.
+        if: ${{ always() }}
+        # Note: Dumps to workflow logs instead of using actions/upload-artifact
+        #       This keeps logs colocated with failing jobs
+        #       It also ignores find's exit code; this is a best effort affair
+        run: >-
+          find _trial_temp -name '*.log'
+          -exec echo "::group::{}" \;
+          -exec cat {} \;
+          -exec echo "::endgroup::" \;
+          || true
+
+  sytest:
+    if: ${{ !failure() && !cancelled() && needs.changes.outputs.integration == 'true' }}
+    needs:
+      - calculate-test-jobs
+      - changes
+    runs-on: ubuntu-latest
+    container:
+      image: matrixdotorg/sytest-synapse:${{ matrix.job.sytest-tag }}
+      volumes:
+        - ${{ github.workspace }}:/src
+      env:
+        # If this is a pull request to a release branch, use that branch as default branch for sytest, else use develop
+        # This works because the release script always create a branch on the sytest repo with the same name as the release branch
+        SYTEST_DEFAULT_BRANCH: ${{ startsWith(github.base_ref, 'release-') && github.base_ref || 'develop' }}
+        SYTEST_BRANCH: ${{ github.head_ref }}
+        POSTGRES: ${{ matrix.job.postgres && 1}}
+        MULTI_POSTGRES: ${{ (matrix.job.postgres == 'multi-postgres') || '' }}
+        ASYNCIO_REACTOR: ${{ (matrix.job.reactor == 'asyncio') || '' }}
+        WORKERS: ${{ matrix.job.workers && 1 }}
+        BLACKLIST: ${{ matrix.job.workers && 'synapse-blacklist-with-workers' }}
+        TOP: ${{ github.workspace }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        job: ${{ fromJson(needs.calculate-test-jobs.outputs.sytest_test_matrix) }}
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - name: Prepare test blacklist
+        run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Run SyTest
+        run: /bootstrap.sh synapse
+        working-directory: /src
+      - name: Summarise results.tap
+        if: ${{ always() }}
+        run: /sytest/scripts/tap_to_gha.pl /logs/results.tap
+      - name: Upload SyTest logs
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        if: ${{ always() }}
+        with:
+          name: Sytest Logs - ${{ job.status }} - (${{ join(matrix.job.*, ', ') }})
+          path: |
+            /logs/results.tap
+            /logs/**/*.log*
+
+  export-data:
+    if: ${{ !failure() && !cancelled() && needs.changes.outputs.integration == 'true'}} # Allow previous steps to be skipped, but not fail
+    needs: [linting-done, portdb, changes]
+    runs-on: ubuntu-latest
+    env:
+      TOP: ${{ github.workspace }}
+
+    services:
+      postgres:
+        image: postgres
+        ports:
+          - 5432:5432
+        env:
+          POSTGRES_PASSWORD: "postgres"
+          POSTGRES_INITDB_ARGS: "--lc-collate C --lc-ctype C --encoding UTF8"
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - run: sudo apt-get -qq install xmlsec1 postgresql-client
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          poetry-version: "2.1.1"
+          extras: "postgres"
+      - run: .ci/scripts/test_export_data_command.sh
+        env:
+          PGHOST: localhost
+          PGUSER: postgres
+          PGPASSWORD: postgres
+          PGDATABASE: postgres
+
+
+  portdb:
+    if: ${{ !failure() && !cancelled() && needs.changes.outputs.integration == 'true'}} # Allow previous steps to be skipped, but not fail
+    needs:
+      - linting-done
+      - changes
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - python-version: "3.10"
+            postgres-version: "13"
+
+          - python-version: "3.14"
+            postgres-version: "17"
+
+    services:
+      postgres:
+        image: postgres:${{ matrix.postgres-version }}
+        ports:
+          - 5432:5432
+        env:
+          POSTGRES_PASSWORD: "postgres"
+          POSTGRES_INITDB_ARGS: "--lc-collate C --lc-ctype C --encoding UTF8"
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - 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
+        # behind new releases, so we have to use the PostreSQL apt repository.
+        # Steps taken from https://www.postgresql.org/download/linux/ubuntu/
+        run: |
+          sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+          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@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          python-version: ${{ matrix.python-version }}
+          poetry-version: "2.1.1"
+          extras: "postgres"
+      - run: .ci/scripts/test_synapse_port_db.sh
+        id: run_tester_script
+        env:
+          PGHOST: localhost
+          PGUSER: postgres
+          PGPASSWORD: postgres
+          PGDATABASE: postgres
+      - name: "Upload schema differences"
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        if: ${{ failure() && !cancelled() && steps.run_tester_script.outcome == 'failure' }}
+        with:
+          name: Schema dumps
+          path: |
+            unported.sql
+            ported.sql
+            schema_diff
+
+  complement:
+    if: "${{ !failure() && !cancelled() && needs.changes.outputs.integration == 'true' }}"
+    needs:
+      - linting-done
+      - changes
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arrangement: monolith
+            database: SQLite
+
+          - arrangement: monolith
+            database: Postgres
+
+          - arrangement: workers
+            database: Postgres
+
+    steps:
+      - name: Checkout synapse codebase
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          path: synapse
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Prepare Complement's Prerequisites
+        run: synapse/.ci/scripts/setup_complement_prerequisites.sh
+
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+        with:
+          cache-dependency-path: complement/go.sum
+          go-version-file: complement/go.mod
+
+        # use p=1 concurrency as GHA boxes are underpowered and don't like running tons of synapses at once.
+      - run: |
+          set -o pipefail
+          COMPLEMENT_DIR=`pwd`/complement synapse/scripts-dev/complement.sh -p 1 -json 2>&1 | synapse/.ci/scripts/gotestfmt
+        shell: bash
+        env:
+          POSTGRES: ${{ (matrix.database == 'Postgres') && 1 || '' }}
+          WORKERS: ${{ (matrix.arrangement == 'workers') && 1 || '' }}
+        name: Run Complement Tests
+
+  cargo-test:
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+    runs-on: ubuntu-latest
+    needs:
+      - linting-done
+      - changes
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - run: cargo test
+
+  # We want to ensure that the cargo benchmarks still compile, which requires a
+  # nightly compiler.
+  cargo-bench:
+    if: ${{ needs.changes.outputs.rust == 'true' }}
+    runs-on: ubuntu-latest
+    needs:
+      - linting-done
+      - changes
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+            toolchain: nightly-2022-12-01
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - run: cargo bench --no-run
+
+  # a job which marks all the other jobs as complete, thus allowing PRs to be merged.
+  tests-done:
+    if: ${{ always() }}
+    needs:
+      - trial
+      - trial-olddeps
+      - sytest
+      - export-data
+      - portdb
+      - complement
+      - cargo-test
+      - cargo-bench
+      - linting-done
+    runs-on: ubuntu-latest
+    steps:
+      - uses: matrix-org/done-action@3409aa904e8a2aaf2220f09bc954d3d0b0a2ee67 # v3
+        with:
+          needs: ${{ toJSON(needs) }}
+
+          # Various bits are skipped if there was no applicable changes.
+          # The newsfile lint may be skipped on non PR builds.
+          skippable: |
+            trial
+            trial-olddeps
+            sytest
+            portdb
+            export-data
+            complement
+            lint-newsfile
+            cargo-test
+            cargo-bench

.github/workflows/triage-incoming.yml

@@ -0,0 +1,14 @@
+name: Move new issues into the issue triage board
+
+on:
+  issues:
+    types: [ opened ]
+
+jobs:
+  triage:
+    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 }}
+    secrets:
+      github_access_token: ${{ secrets.ELEMENT_BOT_TOKEN }}

.github/workflows/triage_labelled.yml

@@ -0,0 +1,31 @@
+name: Move labelled issues to correct projects
+
+on:
+  issues:
+    types: [ labeled ]
+
+jobs:
+  move_needs_info:
+    runs-on: ubuntu-latest
+    if: >
+      contains(github.event.issue.labels.*.name, 'X-Needs-Info')
+    permissions:
+      contents: read
+    env:
+      # This token must have the following scopes: ["repo:public_repo", "admin:org->read:org", "user->read:user", "project"]
+      GITHUB_TOKEN: ${{ secrets.ELEMENT_BOT_TOKEN }}
+      PROJECT_OWNER: matrix-org
+      # Backend issue triage board.
+      # https://github.com/orgs/matrix-org/projects/67/views/1
+      PROJECT_NUMBER: 67
+      ISSUE_URL: ${{ github.event.issue.html_url }}
+      # This field is case-sensitive.
+      TARGET_STATUS: Needs info
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          # Only clone the script file we care about, instead of the whole repo.
+          sparse-checkout: .ci/scripts/triage_labelled_issue.sh
+
+      - name: Ensure issue exists on the board, then set Status
+        run: .ci/scripts/triage_labelled_issue.sh

.github/workflows/twisted_trunk.yml

@@ -0,0 +1,226 @@
+name: Twisted Trunk
+
+on:
+  schedule:
+    - cron: 0 8 * * *
+
+  workflow_dispatch:
+    # NB: inputs are only present when this workflow is dispatched manually.
+    # (The default below is the default field value in the form to trigger
+    # a manual dispatch). Otherwise the inputs will evaluate to null.
+    inputs:
+      twisted_ref:
+        description: Commit, branch or tag to checkout from upstream Twisted.
+        required: false
+        default: 'trunk'
+        type: string
+
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  RUST_VERSION: 1.87.0
+
+jobs:
+  check_repo:
+    # Prevent this workflow from running on any fork of Synapse other than element-hq/synapse, as it is
+    # only useful to the Synapse core team.
+    # All other workflow steps depend on this one, thus if 'should_run_workflow' is not 'true', the rest
+    # of the workflow will be skipped as well.
+    if: github.repository == 'element-hq/synapse'
+    runs-on: ubuntu-latest
+    outputs:
+      should_run_workflow: ${{ steps.check_condition.outputs.should_run_workflow }}
+    steps:
+      - id: check_condition
+        run: echo "should_run_workflow=${{ github.repository == 'element-hq/synapse' }}" >> "$GITHUB_OUTPUT"
+
+  mypy:
+    needs: check_repo
+    if: needs.check_repo.outputs.should_run_workflow == 'true'
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
+        with:
+          python-version: "3.x"
+          extras: "all"
+          poetry-version: "2.1.1"
+      - run: |
+          poetry remove twisted
+          poetry add --extras tls git+https://github.com/twisted/twisted.git#${{ inputs.twisted_ref || 'trunk' }}
+          poetry install --no-interaction --extras "all test"
+      - name: Remove unhelpful options from mypy config
+        run: sed -e '/warn_unused_ignores = True/d' -e '/warn_redundant_casts = True/d' -i mypy.ini
+      - run: poetry run mypy
+
+  trial:
+    needs: check_repo
+    if: needs.check_repo.outputs.should_run_workflow == 'true'
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - run: sudo apt-get -qq install xmlsec1
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - 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
+          poetry install --no-interaction --extras "all test"
+      - run: poetry run trial --jobs 2 tests
+
+      - name: Dump logs
+        # Logs are most useful when the command fails, always include them.
+        if: ${{ always() }}
+        # Note: Dumps to workflow logs instead of using actions/upload-artifact
+        #       This keeps logs colocated with failing jobs
+        #       It also ignores find's exit code; this is a best effort affair
+        run: >-
+          find _trial_temp -name '*.log'
+          -exec echo "::group::{}" \;
+          -exec cat {} \;
+          -exec echo "::endgroup::" \;
+          || true
+
+  sytest:
+    needs: check_repo
+    if: needs.check_repo.outputs.should_run_workflow == 'true'
+    runs-on: ubuntu-latest
+    container:
+      # We're using bookworm because that's what Debian oldstable is at the time of writing.
+      # This job is a canary to warn us about unreleased twisted changes that would cause problems for us if
+      # they were to be released immediately. For simplicity's sake (and to save CI runners) we use the oldest
+      # version, assuming that any incompatibilities on newer versions would also be present on the oldest.
+      image: matrixdotorg/sytest-synapse:bookworm
+      volumes:
+        - ${{ github.workspace }}:/src
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
+        with:
+          toolchain: ${{ env.RUST_VERSION }}
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
+
+      - name: Patch dependencies
+        # Note: The poetry commands want to create a virtualenv in /src/.venv/,
+        #       but the sytest-synapse container expects it to be in /venv/.
+        #       We symlink it before running poetry so that poetry actually
+        #       ends up installing to `/venv`.
+        run: |
+          ln -s -T /venv /src/.venv
+          poetry remove twisted
+          poetry add --extras tls git+https://github.com/twisted/twisted.git#trunk
+          poetry install --no-interaction --extras "all test"
+        working-directory: /src
+      - name: Run SyTest
+        run: /bootstrap.sh synapse
+        working-directory: /src
+        env:
+          # Use offline mode to avoid reinstalling the pinned version of
+          # twisted.
+          OFFLINE: 1
+      - name: Summarise results.tap
+        if: ${{ always() }}
+        run: /sytest/scripts/tap_to_gha.pl /logs/results.tap
+      - name: Upload SyTest logs
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        if: ${{ always() }}
+        with:
+          name: Sytest Logs - ${{ job.status }} - (${{ join(matrix.*, ', ') }})
+          path: |
+            /logs/results.tap
+            /logs/**/*.log*
+
+  complement:
+    needs: check_repo
+    if: "!failure() && !cancelled() && needs.check_repo.outputs.should_run_workflow == 'true'"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arrangement: monolith
+            database: SQLite
+
+          - arrangement: monolith
+            database: Postgres
+
+          - arrangement: workers
+            database: Postgres
+
+    steps:
+      - name: Run actions/checkout@v4 for synapse
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          path: synapse
+
+      - name: Prepare Complement's Prerequisites
+        run: synapse/.ci/scripts/setup_complement_prerequisites.sh
+
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
+        with:
+          cache-dependency-path: complement/go.sum
+          go-version-file: complement/go.mod
+
+      # This step is specific to the 'Twisted trunk' test run:
+      - name: Patch dependencies
+        run: |
+          set -x
+          DEBIAN_FRONTEND=noninteractive sudo apt-get install -yqq python3 pipx
+          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
+        working-directory: synapse
+
+      - run: |
+          set -o pipefail
+          TEST_ONLY_SKIP_DEP_HASH_VERIFICATION=1 POSTGRES=${{ (matrix.database == 'Postgres') && 1 || '' }} WORKERS=${{ (matrix.arrangement == 'workers') && 1 || '' }} COMPLEMENT_DIR=`pwd`/complement synapse/scripts-dev/complement.sh -json 2>&1 | synapse/.ci/scripts/gotestfmt
+        shell: bash
+        name: Run Complement Tests
+
+  # open an issue if the build fails, so we know about it.
+  open-issue:
+    if: failure() && needs.check_repo.outputs.should_run_workflow == 'true'
+    needs:
+      - mypy
+      - trial
+      - sytest
+      - complement
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          update_existing: true
+          filename: .ci/twisted_trunk_build_failed_issue_template.md

CHANGES.md

@@ -1,319 +1,3 @@
-# Synapse 1.144.0 (2025-12-09)
-
-## Deprecation of MacOS Python wheels
-
-The team has decided to deprecate and stop publishing python wheels for MacOS.
-Synapse docker images will continue to work on MacOS, as will building Synapse
-from source (though note this requires a Rust compiler).
-
-## Unstable mutual rooms endpoint is now behind an experimental feature flag
-
-Admins using the unstable [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) endpoint (`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`),
-please check [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11440) as this release contains changes
-that disable that endpoint by default.
-
-
-
-No significant changes since 1.144.0rc1.
-
-
-
-
-# Synapse 1.144.0rc1 (2025-12-02)
-
-Admins using the unstable [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) endpoint (`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`), please check [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11440) as this release contains changes that disable that endpoint by default.
-
-## Features
-
-- Add experimentatal implememntation of [MSC4380](https://github.com/matrix-org/matrix-spec-proposals/pull/4380) (invite blocking). ([\#19203](https://github.com/element-hq/synapse/issues/19203))
-- Allow restarting delayed event timeouts on workers. ([\#19207](https://github.com/element-hq/synapse/issues/19207))
-
-## Bugfixes
-
-- Fix a bug in the database function for fetching state deltas that could result in unnecessarily long query times. ([\#18960](https://github.com/element-hq/synapse/issues/18960))
-- Fix v12 rooms when running with `use_frozen_dicts: True`. ([\#19235](https://github.com/element-hq/synapse/issues/19235))
-- Fix bug where invalid `canonical_alias` content would return 500 instead of 400. ([\#19240](https://github.com/element-hq/synapse/issues/19240))
-- Fix bug where `Duration` was logged incorrectly. ([\#19267](https://github.com/element-hq/synapse/issues/19267))
-
-## Improved Documentation
-
-- Document in the `--config-path` help how multiple files are merged - by merging them shallowly. ([\#19243](https://github.com/element-hq/synapse/issues/19243))
-
-## Deprecations and Removals
-
-- Stop building release wheels for MacOS. ([\#19225](https://github.com/element-hq/synapse/issues/19225))
-
-## Internal Changes
-
-- Improve event filtering for Simplified Sliding Sync. ([\#17782](https://github.com/element-hq/synapse/issues/17782))
-- Export `SYNAPSE_SUPPORTED_COMPLEMENT_TEST_PACKAGES` environment variable from `scripts-dev/complement.sh`. ([\#19208](https://github.com/element-hq/synapse/issues/19208))
-- Refactor `scripts-dev/complement.sh` logic to avoid `exit` to facilitate being able to source it from other scripts (composable). ([\#19209](https://github.com/element-hq/synapse/issues/19209))
-- Expire sliding sync connections that are too old or have too much pending data. ([\#19211](https://github.com/element-hq/synapse/issues/19211))
-- Require an experimental feature flag to be enabled in order for the unstable [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) endpoint (`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`) to be available. ([\#19219](https://github.com/element-hq/synapse/issues/19219))
-- Prevent changelog check CI running on @dependabot's PRs even when a human has modified the branch. ([\#19220](https://github.com/element-hq/synapse/issues/19220))
-- Auto-fix trailing spaces in multi-line strings and comments when running the lint script. ([\#19221](https://github.com/element-hq/synapse/issues/19221))
-- Move towards using a dedicated `Duration` type. ([\#19223](https://github.com/element-hq/synapse/issues/19223), [\#19229](https://github.com/element-hq/synapse/issues/19229))
-- Improve robustness of the SQL schema linting in CI. ([\#19224](https://github.com/element-hq/synapse/issues/19224))
-- Add log to determine whether clients are using `/messages` as expected. ([\#19226](https://github.com/element-hq/synapse/issues/19226))
-- Simplify README and add ESS Getting started section. ([\#19228](https://github.com/element-hq/synapse/issues/19228), [\#19259](https://github.com/element-hq/synapse/issues/19259))
-- Add a unit test for ensuring associated refresh tokens are erased when a device is deleted. ([\#19230](https://github.com/element-hq/synapse/issues/19230))
-- Prompt user to consider adding future deprecations to the changelog in release script. ([\#19239](https://github.com/element-hq/synapse/issues/19239))
-- Fix check of the Rust compiled code being outdated when using source checkout and `.egg-info`. ([\#19251](https://github.com/element-hq/synapse/issues/19251))
-- Stop building macos wheels in CI pipeline. ([\#19263](https://github.com/element-hq/synapse/issues/19263))
-
-
-
-### Updates to locked dependencies
-
-* Bump Swatinem/rust-cache from 2.8.1 to 2.8.2. ([\#19244](https://github.com/element-hq/synapse/issues/19244))
-* Bump actions/checkout from 5.0.0 to 6.0.0. ([\#19213](https://github.com/element-hq/synapse/issues/19213))
-* Bump actions/setup-go from 6.0.0 to 6.1.0. ([\#19214](https://github.com/element-hq/synapse/issues/19214))
-* Bump actions/setup-python from 6.0.0 to 6.1.0. ([\#19245](https://github.com/element-hq/synapse/issues/19245))
-* Bump attrs from 25.3.0 to 25.4.0. ([\#19215](https://github.com/element-hq/synapse/issues/19215))
-* Bump docker/metadata-action from 5.9.0 to 5.10.0. ([\#19246](https://github.com/element-hq/synapse/issues/19246))
-* Bump http from 1.3.1 to 1.4.0. ([\#19249](https://github.com/element-hq/synapse/issues/19249))
-* Bump pydantic from 2.12.4 to 2.12.5. ([\#19250](https://github.com/element-hq/synapse/issues/19250))
-* Bump pyopenssl from 25.1.0 to 25.3.0. ([\#19248](https://github.com/element-hq/synapse/issues/19248))
-* Bump rpds-py from 0.28.0 to 0.29.0. ([\#19216](https://github.com/element-hq/synapse/issues/19216))
-* Bump rpds-py from 0.29.0 to 0.30.0. ([\#19247](https://github.com/element-hq/synapse/issues/19247))
-* Bump sentry-sdk from 2.44.0 to 2.46.0. ([\#19218](https://github.com/element-hq/synapse/issues/19218))
-* Bump types-bleach from 6.2.0.20250809 to 6.3.0.20251115. ([\#19217](https://github.com/element-hq/synapse/issues/19217))
-* Bump types-jsonschema from 4.25.1.20250822 to 4.25.1.20251009. ([\#19252](https://github.com/element-hq/synapse/issues/19252))
-
-# Synapse 1.143.0 (2025-11-25)
-
-## Dropping support for PostgreSQL 13
-
-In line with our [deprecation policy](https://github.com/element-hq/synapse/blob/develop/docs/deprecation_policy.md), we've dropped
-support for PostgreSQL 13, as it is no longer supported upstream.
-This release of Synapse requires PostgreSQL 14+.
-
-No significant changes since 1.143.0rc2.
-
-
-
-
-# Synapse 1.143.0rc2 (2025-11-18)
-
-## Dropping support for PostgreSQL 13
-
-In line with our [deprecation policy](https://github.com/element-hq/synapse/blob/develop/docs/deprecation_policy.md), we've dropped
-support for PostgreSQL 13, as it is no longer supported upstream.
-This release of Synapse requires PostgreSQL 14+.
-
-
-## Internal Changes
-
-- Fixes docker image creation in the release workflow.
-
-
-
-# Synapse 1.143.0rc1 (2025-11-18)
-
-## Features
-
-- Support multiple config files in `register_new_matrix_user`. ([\#18784](https://github.com/element-hq/synapse/issues/18784))
-- Remove authentication from `POST /_matrix/client/v1/delayed_events`, and allow calling this endpoint with the update action to take (`send`/`cancel`/`restart`) in the request path instead of the body. ([\#19152](https://github.com/element-hq/synapse/issues/19152))
-
-## Bugfixes
-
-- Fixed a longstanding bug where background updates were only run on the `main` database. ([\#19181](https://github.com/element-hq/synapse/issues/19181))
-- Fixed a bug introduced in v1.142.0 preventing subpaths in MAS endpoints from working. ([\#19186](https://github.com/element-hq/synapse/issues/19186))
-- Fix the SQLite-to-PostgreSQL migration script to correctly migrate a boolean column in the `delayed_events` table. ([\#19155](https://github.com/element-hq/synapse/issues/19155))
-
-## Improved Documentation
-
-- Improve documentation around streams, particularly ID generators and adding new streams. ([\#18943](https://github.com/element-hq/synapse/issues/18943))
-
-## Deprecations and Removals
-
-- Remove support for PostgreSQL 13. ([\#19170](https://github.com/element-hq/synapse/issues/19170))
-
-## Internal Changes
-
-- Provide additional servers with federation room directory results. ([\#18970](https://github.com/element-hq/synapse/issues/18970))
-- Add a shortcut return when there are no events to purge. ([\#19093](https://github.com/element-hq/synapse/issues/19093))
-- Write union types as `X | Y` where possible, as per PEP 604, added in Python 3.10. ([\#19111](https://github.com/element-hq/synapse/issues/19111))
-- Reduce cardinality of `synapse_storage_events_persisted_events_sep_total` metric by removing `origin_entity` label. This also separates out events sent by local application services by changing the `origin_type` for such events to `application_service`. The `type` field also only tracks common event types, and anything else is bucketed under `*other*`. ([\#19133](https://github.com/element-hq/synapse/issues/19133), [\#19168](https://github.com/element-hq/synapse/issues/19168))
-- Run trial tests on Python 3.14 for PRs. ([\#19135](https://github.com/element-hq/synapse/issues/19135))
-- Update `pyproject.toml` project metadata to be compatible with standard Python packaging tooling. ([\#19137](https://github.com/element-hq/synapse/issues/19137))
-- Minor speed up of processing of inbound replication. ([\#19138](https://github.com/element-hq/synapse/issues/19138), [\#19145](https://github.com/element-hq/synapse/issues/19145), [\#19146](https://github.com/element-hq/synapse/issues/19146))
-- Ignore recent Python language refactors from git blame (`.git-blame-ignore-revs`). ([\#19150](https://github.com/element-hq/synapse/issues/19150))
-- Bump lower bounds of dependencies `parameterized` to `0.9.0` and `idna` to `3.3` as those are the first to advertise support for Python 3.10. ([\#19167](https://github.com/element-hq/synapse/issues/19167))
-- Point out which event caused the exception when checking [MSC4293](https://github.com/matrix-org/matrix-spec-proposals/pull/4293) redactions. ([\#19169](https://github.com/element-hq/synapse/issues/19169))
-- Restore printing `sentinel` for the log record `request` when no logcontext is active. ([\#19172](https://github.com/element-hq/synapse/issues/19172))
-- Add debug logs to track `Clock` utilities. ([\#19173](https://github.com/element-hq/synapse/issues/19173))
-- Remove explicit python version skips in `cibuildwheel` config as it's no longer required after [#19137](https://github.com/element-hq/synapse/pull/19137). ([\#19177](https://github.com/element-hq/synapse/issues/19177))
-- Fix potential lost logcontext when `PerDestinationQueue.shutdown(...)` is called. ([\#19178](https://github.com/element-hq/synapse/issues/19178))
-- Fix bad deferred logcontext handling across the codebase. ([\#19180](https://github.com/element-hq/synapse/issues/19180))
-
-
-
-### Updates to locked dependencies
-
-* Bump bytes from 1.10.1 to 1.11.0. ([\#19193](https://github.com/element-hq/synapse/issues/19193))
-* Bump click from 8.1.8 to 8.3.1. ([\#19195](https://github.com/element-hq/synapse/issues/19195))
-* Bump cryptography from 43.0.3 to 45.0.7. ([\#19159](https://github.com/element-hq/synapse/issues/19159))
-* Bump docker/metadata-action from 5.8.0 to 5.9.0. ([\#19161](https://github.com/element-hq/synapse/issues/19161))
-* Bump pydantic from 2.12.3 to 2.12.4. ([\#19158](https://github.com/element-hq/synapse/issues/19158))
-* Bump pyo3-log from 0.13.1 to 0.13.2. ([\#19156](https://github.com/element-hq/synapse/issues/19156))
-* Bump ruff from 0.14.3 to 0.14.5. ([\#19196](https://github.com/element-hq/synapse/issues/19196))
-* Bump sentry-sdk from 2.34.1 to 2.43.0. ([\#19157](https://github.com/element-hq/synapse/issues/19157))
-* Bump sentry-sdk from 2.43.0 to 2.44.0. ([\#19197](https://github.com/element-hq/synapse/issues/19197))
-* Bump tomli from 2.2.1 to 2.3.0. ([\#19194](https://github.com/element-hq/synapse/issues/19194))
-* Bump types-netaddr from 1.3.0.20240530 to 1.3.0.20251108. ([\#19160](https://github.com/element-hq/synapse/issues/19160))
-
-
-
-# Synapse 1.142.1 (2025-11-18)
-
-## Bugfixes
-
-- Fixed a bug introduced in v1.142.0 preventing subpaths in MAS endpoints from working. ([\#19186](https://github.com/element-hq/synapse/issues/19186))
-
-
-
-
-# Synapse 1.142.0 (2025-11-11)
-
-## Dropped support for Python 3.9
-
-This release drops support for Python 3.9, in line with our [dependency
-deprecation
-policy](https://element-hq.github.io/synapse/latest/deprecation_policy.html#platform-dependencies),
-as it is now [end of life](https://endoflife.date/python).
-
-## SQLite 3.40.0+ is now required
-
-The minimum supported SQLite version has been increased from 3.27.0 to 3.40.0.
-
-If you use current versions of the
-[matrixorg/synapse](setup/installation.html#docker-images-and-ansible-playbooks)
-Docker images, no action is required.
-
-
-## Deprecation of MacOS Python wheels
-
-The team has decided to deprecate and eventually stop publishing python wheels
-for MacOS. This is a burden on the team, and we're not aware of any parties
-that use them. Synapse docker images will continue to work on MacOS, as will
-building Synapse from source (though note this requires a Rust compiler).
-
-At present, publishing MacOS Python wheels will continue for the next release
-(1.143.0), but will not be available after that (1.144.0+). If you do make use
-of these wheels downstream, please reach out to us in
-[#synapse-dev:matrix.org](https://matrix.to/#/#synapse-dev:matrix.org). We'd
-love to hear from you!
-
-## Internal Changes
-
-- Properly stop building wheels for Python 3.9 and free-threaded CPython. ([\#19154](https://github.com/element-hq/synapse/issues/19154))
-
-
-
-
-# Synapse 1.142.0rc4 (2025-11-07)
-
-## Bugfixes
-
-- Fix a bug introduced in 1.142.0rc1 where any attempt to configure `matrix_authentication_service.secret_path` would prevent the homeserver from starting up. ([\#19144](https://github.com/element-hq/synapse/issues/19144))
-
-
-
-
-# Synapse 1.142.0rc3 (2025-11-04)
-
-## Internal Changes
-
-- Update release scripts to prevent building wheels for free-threaded Python, as Synapse does not currently support it. ([\#19140](https://github.com/element-hq/synapse/issues/19140))
-
-
-# Synapse 1.142.0rc2 (2025-11-04)
-
-
-## Internal Changes
-
-- Manually skip building Python 3.9 wheels, to prevent errors in the release workflow. ([\#19119](https://github.com/element-hq/synapse/issues/19119))
-
-
-
-
-# Synapse 1.142.0rc1 (2025-11-04)
-
-## Features
-
-- Add support for Python 3.14. ([\#19055](https://github.com/element-hq/synapse/issues/19055), [\#19134](https://github.com/element-hq/synapse/issues/19134))
-- Add an [Admin API](https://element-hq.github.io/synapse/latest/usage/administration/admin_api/index.html)
-  to allow an admin to fetch the space/room hierarchy for a given space. ([\#19021](https://github.com/element-hq/synapse/issues/19021))
-
-## Bugfixes
-
-- Fix a bug introduced in 1.111.0 where failed attempts to download authenticated remote media would not be handled correctly. ([\#19062](https://github.com/element-hq/synapse/issues/19062))
-- Update the `oidc_session_no_samesite` cookie to have the `Secure` attribute, so the only difference between it and the paired `oidc_session` cookie, is the configuration of the `SameSite` attribute as described in the comments / cookie names. Contributed by @kieranlane. ([\#19079](https://github.com/element-hq/synapse/issues/19079))
-- Fix a bug introduced in 1.140.0 where lost logcontext warnings would be emitted from timeouts in sync and requests made by Synapse itself. ([\#19090](https://github.com/element-hq/synapse/issues/19090))
-- Fix a bug introdued in 1.140.0 where lost logcontext warning were emitted when using `HomeServer.shutdown()`. ([\#19108](https://github.com/element-hq/synapse/issues/19108))
-
-## Improved Documentation
-
-- Update the link to the Debian oldstable package for SQLite. ([\#19047](https://github.com/element-hq/synapse/issues/19047))
-- Point out additional Redis configuration options available in the worker docs. Contributed by @servisbryce. ([\#19073](https://github.com/element-hq/synapse/issues/19073))
-- Update the list of Debian releases that the downstream Debian package is maintained for. ([\#19100](https://github.com/element-hq/synapse/issues/19100))
-- Add [a page](https://element-hq.github.io/synapse/latest/development/internal_documentation/release_notes_review_checklist.html) to the documentation describing the steps the Synapse team takes to review the release notes before publishing them. ([\#19109](https://github.com/element-hq/synapse/issues/19109))
-
-## Deprecations and Removals
-
-- Drop support for Python 3.9. ([\#19099](https://github.com/element-hq/synapse/issues/19099))
-- Remove support for SQLite < 3.37.2. ([\#19047](https://github.com/element-hq/synapse/issues/19047))
-
-## Internal Changes
-
-- Fix CI linter for schema delta files to correctly handle all types of `CREATE TABLE` syntax. ([\#19020](https://github.com/element-hq/synapse/issues/19020))
-- Use type hinting generics in standard collections, as per [PEP 585](https://peps.python.org/pep-0585/), added in Python 3.9. ([\#19046](https://github.com/element-hq/synapse/issues/19046))
-- Always treat `RETURNING` as supported by SQL engines, now that the minimum-supported versions of both SQLite and PostgreSQL support it. ([\#19047](https://github.com/element-hq/synapse/issues/19047))
-- Move `oidc.load_metadata()` startup into `_base.start()`. ([\#19056](https://github.com/element-hq/synapse/issues/19056))
-- Remove logcontext problems caused by awaiting raw `deferLater(...)`. ([\#19058](https://github.com/element-hq/synapse/issues/19058))
-- Prevent duplicate logging setup when running multiple Synapse instances. ([\#19067](https://github.com/element-hq/synapse/issues/19067))
-- Be mindful of other logging context filters in 3rd-party code and avoid overwriting log record fields unless we know the log record is relevant to Synapse. ([\#19068](https://github.com/element-hq/synapse/issues/19068))
-- Update pydantic to v2. ([\#19071](https://github.com/element-hq/synapse/issues/19071))
-- Update deprecated code in the release script to prevent a warning message from being printed. ([\#19080](https://github.com/element-hq/synapse/issues/19080))
-- Update the deprecated poetry development dependencies group name in `pyproject.toml`. ([\#19081](https://github.com/element-hq/synapse/issues/19081))
-- Remove `pp38*` skip selector from cibuildwheel to silence warning. ([\#19085](https://github.com/element-hq/synapse/issues/19085))
-- Don't immediately exit the release script if the checkout is dirty. Instead, allow the user to clear the dirty changes and retry. ([\#19088](https://github.com/element-hq/synapse/issues/19088))
-- Update the release script's generated announcement text to include a title and extra text for RC's. ([\#19089](https://github.com/element-hq/synapse/issues/19089))
-- Fix lints on main branch. ([\#19092](https://github.com/element-hq/synapse/issues/19092))
-- Use cheaper random string function in logcontext utilities. ([\#19094](https://github.com/element-hq/synapse/issues/19094))
-- Avoid clobbering other `SIGHUP` handlers in 3rd-party code. ([\#19095](https://github.com/element-hq/synapse/issues/19095))
-- Prevent duplicate GitHub draft releases being created during the Synapse release process. ([\#19096](https://github.com/element-hq/synapse/issues/19096))
-- Use Pillow's `Image.getexif` method instead of the experimental `Image._getexif`. ([\#19098](https://github.com/element-hq/synapse/issues/19098))
-- Prevent uv `/usr/local/.lock` file from appearing in built Synapse docker images. ([\#19107](https://github.com/element-hq/synapse/issues/19107))
-- Allow Synapse's runtime dependency checking code to take packaging markers (i.e. `python <= 3.14`) into account when checking dependencies. ([\#19110](https://github.com/element-hq/synapse/issues/19110))
-- Move exception handling up the stack (avoid `exit(1)` in our composable functions). ([\#19116](https://github.com/element-hq/synapse/issues/19116))
-- Fix a lint error related to lifetimes in Rust 1.90. ([\#19118](https://github.com/element-hq/synapse/issues/19118))
-- Refactor and align app entrypoints (avoid `exit(1)` in our composable functions). ([\#19121](https://github.com/element-hq/synapse/issues/19121), [\#19131](https://github.com/element-hq/synapse/issues/19131))
-- Speed up pruning of ratelimiters. ([\#19129](https://github.com/element-hq/synapse/issues/19129))
-
-
-
-### Updates to locked dependencies
-
-* Bump actions/download-artifact from 5.0.0 to 6.0.0. ([\#19102](https://github.com/element-hq/synapse/issues/19102))
-* Bump actions/upload-artifact from 4 to 5. ([\#19106](https://github.com/element-hq/synapse/issues/19106))
-* Bump hiredis from 3.2.1 to 3.3.0. ([\#19103](https://github.com/element-hq/synapse/issues/19103))
-* Bump icu_segmenter from 2.0.0 to 2.0.1. ([\#19126](https://github.com/element-hq/synapse/issues/19126))
-* Bump idna from 3.10 to 3.11. ([\#19053](https://github.com/element-hq/synapse/issues/19053))
-* Bump ijson from 3.4.0 to 3.4.0.post0. ([\#19051](https://github.com/element-hq/synapse/issues/19051))
-* Bump markdown-it-py from 3.0.0 to 4.0.0. ([\#19123](https://github.com/element-hq/synapse/issues/19123))
-* Bump msgpack from 1.1.1 to 1.1.2. ([\#19050](https://github.com/element-hq/synapse/issues/19050))
-* Bump psycopg2 from 2.9.10 to 2.9.11. ([\#19125](https://github.com/element-hq/synapse/issues/19125))
-* Bump pyyaml from 6.0.2 to 6.0.3. ([\#19105](https://github.com/element-hq/synapse/issues/19105))
-* Bump regex from 1.11.3 to 1.12.2. ([\#19074](https://github.com/element-hq/synapse/issues/19074))
-* Bump reqwest from 0.12.23 to 0.12.24. ([\#19077](https://github.com/element-hq/synapse/issues/19077))
-* Bump ruff from 0.12.10 to 0.14.3. ([\#19124](https://github.com/element-hq/synapse/issues/19124))
-* Bump sigstore/cosign-installer from 3.10.0 to 4.0.0. ([\#19075](https://github.com/element-hq/synapse/issues/19075))
-* Bump stefanzweifel/git-auto-commit-action from 6.0.1 to 7.0.0. ([\#19052](https://github.com/element-hq/synapse/issues/19052))
-* Bump tokio from 1.47.1 to 1.48.0. ([\#19076](https://github.com/element-hq/synapse/issues/19076))
-* Bump types-psycopg2 from 2.9.21.20250915 to 2.9.21.20251012. ([\#19054](https://github.com/element-hq/synapse/issues/19054))
-
 # Synapse 1.141.0 (2025-10-29)
 
 ## Deprecation of MacOS Python wheels

Cargo.lock

@@ -73,9 +73,9 @@ checksum = "46c5e41b57b8bba42a04676d81cb89e9ee8e859a1a66f80a5a72e1cb76b34d43"
 
 [[package]]
 name = "bytes"
-version = "1.11.0"
+version = "1.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b35204fbdc0b3f4446b89fc1ac2cf84a8a68971995d0bf2e925ec7cd960f9cb3"
+checksum = "d71b6127be86fdcfddb610f7182ac57211d4b18a3e9c82eb2d17662f2227ad6a"
 
 [[package]]
 name = "cc"
@@ -374,11 +374,12 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "http"
-version = "1.4.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3ba2a386d7f85a81f119ad7498ebe444d2e22c2af0b86b069416ace48b3311a"
+checksum = "f4a85d31aea989eead29a3aaf9e1115a180df8282431156e533de47660892565"
 dependencies = [
  "bytes",
+ "fnv",
  "itoa",
 ]
 
@@ -850,9 +851,9 @@ dependencies = [
 
 [[package]]
 name = "pyo3-log"
-version = "0.13.2"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f8bae9ad5ba08b0b0ed2bb9c2bdbaeccc69cafca96d78cf0fbcea0d45d122bb"
+checksum = "d359e20231345f21a3b5b6aea7e73f4dc97e1712ef3bfe2d88997ac6a308d784"
 dependencies = [
  "arc-swap",
  "log",

README.rst

@@ -7,48 +7,170 @@
 
 Synapse is an open source `Matrix <https://matrix.org>`__ homeserver
 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 (or
-alternatively under a commercial license from Element).
+`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 (or alternatively under a commercial license from Element).
+There is no support provided by Element unless you have a
+subscription from Element.
 
-There is no support provided by Element unless you have a subscription from
-Element.
+Subscription
+============
 
-🚀 Getting started
-==================
+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
+deployment. It includes advanced identity management, auditing,
+moderation and data retention options as well as Long-Term Support and
+SLAs. ESS supports any Matrix-compatible client.
 
-This component is developed and maintained by `Element <https://element.io>`_.
-It gets shipped as part of the **Element Server Suite (ESS)** which provides the
-official means of deployment.
+.. contents::
 
-ESS is a Matrix distribution from Element with focus on quality and ease of use.
-It ships a full Matrix stack tailored to the respective use case.
+🛠️ Installation and configuration
+==================================
 
-There are three editions of ESS:
+The Synapse documentation describes `how to install Synapse <https://element-hq.github.io/synapse/latest/setup/installation.html>`_. We recommend using
+`Docker images <https://element-hq.github.io/synapse/latest/setup/installation.html#docker-images-and-ansible-playbooks>`_ or `Debian packages from Matrix.org
+<https://element-hq.github.io/synapse/latest/setup/installation.html#matrixorg-packages>`_.
 
-- `ESS Community <https://github.com/element-hq/ess-helm>`_ - the free Matrix
-  distribution from Element tailored to small-/mid-scale, non-commercial
-  community use cases
-- `ESS Pro <https://element.io/server-suite>`_ - the commercial Matrix
-  distribution from Element for professional use
-- `ESS TI-M <https://element.io/server-suite/ti-messenger>`_ - a special version
-  of ESS Pro focused on the requirements of TI-Messenger Pro and ePA as
-  specified by the German National Digital Health Agency Gematik
+.. _federation:
+
+Synapse has a variety of `config options
+<https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html>`_
+which can be used to customise its behaviour after installation.
+There are additional details on how to `configure Synapse for federation here
+<https://element-hq.github.io/synapse/latest/federate.html>`_.
+
+.. _reverse-proxy:
+
+Using a reverse proxy with Synapse
+----------------------------------
+
+It is recommended to put a reverse proxy such as
+`nginx <https://nginx.org/en/docs/http/ngx_http_proxy_module.html>`_,
+`Apache <https://httpd.apache.org/docs/current/mod/mod_proxy_http.html>`_,
+`Caddy <https://caddyserver.com/docs/quick-starts/reverse-proxy>`_,
+`HAProxy <https://www.haproxy.org/>`_ or
+`relayd <https://man.openbsd.org/relayd.8>`_ in front of Synapse. One advantage of
+doing so is that it means that you can expose the default https port (443) to
+Matrix clients without needing to run Synapse with root privileges.
+For information on configuring one, see `the reverse proxy docs
+<https://element-hq.github.io/synapse/latest/reverse_proxy.html>`_.
+
+Upgrading an existing Synapse
+-----------------------------
+
+The instructions for upgrading Synapse are in `the upgrade notes`_.
+Please check these instructions as upgrading may require extra steps for some
+versions of Synapse.
+
+.. _the upgrade notes: https://element-hq.github.io/synapse/develop/upgrade.html
 
 
-🛠️ Standalone installation and configuration
-============================================
+Platform dependencies
+---------------------
 
-The Synapse documentation describes `options for installing Synapse standalone
-<https://element-hq.github.io/synapse/latest/setup/installation.html>`_. See
-below for more useful documentation links.
+Synapse uses a number of platform dependencies such as Python and PostgreSQL,
+and aims to follow supported upstream versions. See the
+`deprecation policy <https://element-hq.github.io/synapse/latest/deprecation_policy.html>`_
+for more details.
 
-- `Synapse configuration options <https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html>`_
-- `Synapse configuration for federation <https://element-hq.github.io/synapse/latest/federate.html>`_
-- `Using a reverse proxy with Synapse <https://element-hq.github.io/synapse/latest/reverse_proxy.html>`_
-- `Upgrading Synapse <https://element-hq.github.io/synapse/develop/upgrade.html>`_
 
+Security note
+-------------
+
+Matrix serves raw, user-supplied data in some APIs -- specifically the `content
+repository endpoints`_.
+
+.. _content repository endpoints: https://matrix.org/docs/spec/client_server/latest.html#get-matrix-media-r0-download-servername-mediaid
+
+Whilst we make a reasonable effort to mitigate against XSS attacks (for
+instance, by using `CSP`_), a Matrix homeserver should not be hosted on a
+domain hosting other web applications. This especially applies to sharing
+the domain with Matrix web clients and other sensitive applications like
+webmail. See
+https://developer.github.com/changes/2014-04-25-user-content-security for more
+information.
+
+.. _CSP: https://github.com/matrix-org/synapse/pull/1021
+
+Ideally, the homeserver should not simply be on a different subdomain, but on
+a completely different `registered domain`_ (also known as top-level site or
+eTLD+1). This is because `some attacks`_ are still possible as long as the two
+applications share the same registered domain.
+
+.. _registered domain: https://tools.ietf.org/html/draft-ietf-httpbis-rfc6265bis-03#section-2.3
+
+.. _some attacks: https://en.wikipedia.org/wiki/Session_fixation#Attacks_using_cross-subdomain_cookie
+
+To illustrate this with an example, if your Element Web or other sensitive web
+application is hosted on ``A.example1.com``, you should ideally host Synapse on
+``example2.com``. Some amount of protection is offered by hosting on
+``B.example1.com`` instead, so this is also acceptable in some scenarios.
+However, you should *not* host your Synapse on ``A.example1.com``.
+
+Note that all of the above refers exclusively to the domain used in Synapse's
+``public_baseurl`` setting. In particular, it has no bearing on the domain
+mentioned in MXIDs hosted on that server.
+
+Following this advice ensures that even if an XSS is found in Synapse, the
+impact to other applications will be minimal.
+
+
+🧪 Testing a new installation
+=============================
+
+The easiest way to try out your new Synapse installation is by connecting to it
+from a web client.
+
+Unless you are running a test instance of Synapse on your local machine, in
+general, you will need to enable TLS support before you can successfully
+connect from a client: see
+`TLS certificates <https://element-hq.github.io/synapse/latest/setup/installation.html#tls-certificates>`_.
+
+An easy way to get started is to login or register via Element at
+https://app.element.io/#/login or https://app.element.io/#/register respectively.
+You will need to change the server you are logging into from ``matrix.org``
+and instead specify a homeserver URL of ``https://<server_name>:8448``
+(or just ``https://<server_name>`` if you are using a reverse proxy).
+If you prefer to use another client, refer to our
+`client breakdown <https://matrix.org/ecosystem/clients/>`_.
+
+If all goes well you should at least be able to log in, create a room, and
+start sending messages.
+
+.. _`client-user-reg`:
+
+Registering a new user from a client
+------------------------------------
+
+By default, registration of new users via Matrix clients is disabled. To enable
+it:
+
+1. In the
+   `registration config section <https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#registration>`_
+   set ``enable_registration: true`` in ``homeserver.yaml``.
+2. Then **either**:
+
+   a. set up a `CAPTCHA <https://element-hq.github.io/synapse/latest/CAPTCHA_SETUP.html>`_, or
+   b. set ``enable_registration_without_verification: true`` in ``homeserver.yaml``.
+
+We **strongly** recommend using a CAPTCHA, particularly if your homeserver is exposed to
+the public internet. Without it, anyone can freely register accounts on your homeserver.
+This can be exploited by attackers to create spambots targeting the rest of the Matrix
+federation.
+
+Your new Matrix ID will be formed partly from the ``server_name``, and partly
+from a localpart you specify when you create the account in the form of::
+
+    @localpart:my.domain.name
+
+(pronounced "at localpart on my dot domain dot name").
+
+As when logging in, you will need to specify a "Custom server".  Specify your
+desired ``localpart`` in the 'Username' box.
 
 🎯 Troubleshooting and support
 ==============================
@@ -60,7 +182,7 @@ Enterprise quality support for Synapse including SLAs is available as part of an
 `Element Server Suite (ESS) <https://element.io/pricing>`_ subscription.
 
 If you are an existing ESS subscriber then you can raise a `support request <https://ems.element.io/support>`_
-and access the `Element product documentation <https://docs.element.io>`_.
+and access the `knowledge base <https://ems-docs.element.io>`_.
 
 🤝 Community support
 --------------------
@@ -79,6 +201,35 @@ issues for support requests, only for bug reports and feature requests.
 .. |docs| replace:: ``docs``
 .. _docs: docs
 
+🪪 Identity Servers
+===================
+
+Identity servers have the job of mapping email addresses and other 3rd Party
+IDs (3PIDs) to Matrix user IDs, as well as verifying the ownership of 3PIDs
+before creating that mapping.
+
+**Identity servers do not store accounts or credentials - these are stored and managed on homeservers.
+Identity Servers are just for mapping 3rd Party IDs to Matrix IDs.**
+
+This process is highly security-sensitive, as there is an obvious risk of spam if it
+is too easy to sign up for Matrix accounts or harvest 3PID data. In the longer
+term, we hope to create a decentralised system to manage it (`matrix-doc #712
+<https://github.com/matrix-org/matrix-doc/issues/712>`_), but in the meantime,
+the role of managing trusted identity in the Matrix ecosystem is farmed out to
+a cluster of known trusted ecosystem partners, who run 'Matrix Identity
+Servers' such as `Sydent <https://github.com/matrix-org/sydent>`_, whose role
+is purely to authenticate and track 3PID logins and publish end-user public
+keys.
+
+You can host your own copy of Sydent, but this will prevent you reaching other
+users in the Matrix ecosystem via their email address, and prevent them finding
+you. We therefore recommend that you use one of the centralised identity servers
+at ``https://matrix.org`` or ``https://vector.im`` for now.
+
+To reiterate: the Identity server will only be used if you choose to associate
+an email address with your account, or send an invite to another user via their
+email address.
+
 
 🛠️ Development
 ==============
@@ -101,29 +252,20 @@ Alongside all that, join our developer community on Matrix:
 Copyright and Licensing
 =======================
 
-  | Copyright 2014–2017 OpenMarket Ltd
-  | Copyright 2017 Vector Creations Ltd
-  | Copyright 2017–2025 New Vector Ltd
-  | Copyright 2025 Element Creations Ltd
+| Copyright 2014-2017 OpenMarket Ltd
+| Copyright 2017 Vector Creations Ltd
+| Copyright 2017-2025 New Vector Ltd
+|
 
-This software is dual-licensed by Element Creations Ltd (Element). It can be
-used either:
+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
+(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).
+(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.
+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.
 
-Please contact `licensing@element.io <mailto:licensing@element.io>`_ to purchase
-an Element commercial license for this software.
+Please contact `licensing@element.io <mailto:licensing@element.io>`_ to purchase an Element commercial license for this software.
 
 
 .. |support| image:: https://img.shields.io/badge/matrix-community%20support-success

changelog.d/18402.misc

@@ -1 +0,0 @@
-Group together dependabot update PRs to reduce the review load.

changelog.d/19020.misc

@@ -0,0 +1 @@
+Fix CI linter for schema delta files to correctly handle all types of `CREATE TABLE` syntax.

changelog.d/19021.feature

@@ -0,0 +1,2 @@
+Add an [Admin API](https://element-hq.github.io/synapse/latest/usage/administration/admin_api/index.html)
+to allow an admin to fetch the space/room hierarchy for a given space.

changelog.d/19046.misc

@@ -0,0 +1 @@
+Use type hinting generics in standard collections, as per PEP 585, added in Python 3.9.

changelog.d/19047.doc

@@ -0,0 +1 @@
+Update the link to the Debian oldstable package for SQLite.

changelog.d/19047.misc

@@ -0,0 +1 @@
+Always treat `RETURNING` as supported by SQL engines, now that the minimum-supported versions of both SQLite and PostgreSQL support it.

changelog.d/19047.removal

@@ -0,0 +1 @@
+Remove support for SQLite < 3.37.2.

changelog.d/19055.misc

@@ -0,0 +1 @@
+Add support for Python 3.14.

changelog.d/19056.misc

@@ -0,0 +1 @@
+Move `oidc.load_metadata()` startup into `_base.start()`.

changelog.d/19058.misc

@@ -0,0 +1 @@
+Remove logcontext problems caused by awaiting raw `deferLater(...)`.

changelog.d/19062.bugfix

@@ -0,0 +1 @@
+Fix a bug introduced in 1.111.0 where failed attempts to download authenticated remote media would not be handled correctly.

changelog.d/19067.misc

@@ -0,0 +1 @@
+Prevent duplicate logging setup when running multiple Synapse instances.

changelog.d/19068.misc

@@ -0,0 +1 @@
+Be mindful of other logging context filters in 3rd-party code and avoid overwriting log record fields unless we know the log record is relevant to Synapse.

changelog.d/19071.misc

@@ -0,0 +1 @@
+Update pydantic to v2.

changelog.d/19073.doc

@@ -0,0 +1 @@
+Point out additional Redis configuration options available in the worker docs. Contributed by @servisbryce.

changelog.d/19079.bugfix

@@ -0,0 +1 @@
+Fix the `oidc_session_no_samesite` cookie to have the `Secure` attribute, so the only difference between it and the paired `oidc_session` cookie, is the configuration of the `SameSite` attribute as described in the comments / cookie names. Contributed by @kieranlane.

changelog.d/19080.misc

@@ -0,0 +1 @@
+Update deprecated code in the release script to prevent a warning message from being printed.

changelog.d/19081.misc

@@ -0,0 +1 @@
+Update the deprecated poetry development dependencies group name in `pyproject.toml`.

changelog.d/19085.misc

@@ -0,0 +1 @@
+Remove `pp38*` skip selector from cibuildwheel to silence warning.

changelog.d/19088.misc

@@ -0,0 +1 @@
+Don't immediately exit the release script if the checkout is dirty. Instead, allow the user to clear the dirty changes and retry.

changelog.d/19089.misc

@@ -0,0 +1 @@
+Update the release script's generated announcement text to include a title and extra text for RC's.

changelog.d/19090.bugfix

@@ -0,0 +1 @@
+Fix lost logcontext warnings from timeouts in sync and requests made by Synapse itself.

changelog.d/19092.misc

@@ -0,0 +1 @@
+Fix lints on main branch.

changelog.d/19094.misc

@@ -0,0 +1 @@
+Use cheaper random string function in logcontext utilities.

changelog.d/19095.misc

@@ -0,0 +1 @@
+Avoid clobbering other `SIGHUP` handlers in 3rd-party code.

changelog.d/19096.misc

@@ -0,0 +1 @@
+Prevent duplicate GitHub draft releases being created during the Synapse release process.

changelog.d/19098.misc

@@ -0,0 +1 @@
+Use Pillow's `Image.getexif` method instead of the experimental `Image._getexif`.

changelog.d/19099.removal

@@ -0,0 +1 @@
+Drop support for Python 3.9.

changelog.d/19100.doc

@@ -0,0 +1 @@
+Update the list of Debian releases that the downstream Debian package is maintained for.

changelog.d/19107.misc

@@ -0,0 +1 @@
+Prevent uv `/usr/local/.lock` file from appearing in built Synapse docker images.

changelog.d/19108.bugfix

@@ -0,0 +1 @@
+Fix lost logcontext when using `HomeServer.shutdown()`.

changelog.d/19109.doc

@@ -0,0 +1 @@
+Add [a page](https://element-hq.github.io/synapse/latest/development/internal_documentation/release_notes_review_checklist.html) to the documentation describing the steps the Synapse team takes to review the release notes before publishing them.

changelog.d/19110.misc

@@ -0,0 +1 @@
+Allow Synapse's runtime dependency checking code to take packaging markers (i.e. `python <= 3.14`) into account when checking dependencies.

changelog.d/19116.misc

@@ -0,0 +1 @@
+Move exception handling up the stack (avoid `exit(1)` in our composable functions).

changelog.d/19118.misc

@@ -0,0 +1 @@
+Fix a lint error related to lifetimes in Rust 1.90.

changelog.d/19121.misc

@@ -0,0 +1 @@
+Refactor and align app entrypoints (avoid `exit(1)` in our composable functions).

changelog.d/19129.misc

@@ -0,0 +1 @@
+Speed up pruning of ratelimiters.

changelog.d/19131.misc

@@ -0,0 +1 @@
+Refactor and align app entrypoints (avoid `exit(1)` in our composable functions).

changelog.d/19134.bugfix

@@ -0,0 +1 @@
+Add support for Python 3.14.

changelog.d/19142.misc

@@ -0,0 +1 @@
+Respect logcontext in `DeferredEvent`.

changelog.d/19187.misc

@@ -1 +0,0 @@
-Fix `HomeServer.shutdown()` failing if the homeserver hasn't been setup yet.

changelog.d/19206.bugfix

@@ -1 +0,0 @@
-Fix sliding sync performance slow down for long lived connections.

changelog.d/19212.misc

@@ -1 +0,0 @@
-Respond with useful error codes with `Content-Length` header/s are invalid.

changelog.d/19231.bugfix

@@ -1 +0,0 @@
-Fix a bug where Mastodon posts (and possibly other embeds) have the wrong description for URL previews.

changelog.d/19232.misc

@@ -1 +0,0 @@
-Fix `HomeServer.shutdown()` failing if the homeserver failed to `start`.

changelog.d/19234.misc

@@ -1 +0,0 @@
-Switch the build backend from `poetry-core` to `maturin`.

changelog.d/19253.misc

@@ -1 +0,0 @@
-Raise the limit for concurrently-open non-security @dependabot PRs from 5 to 10.

changelog.d/19254.removal

@@ -1 +0,0 @@
-Remove the "Updates to locked dependencies" section from the changelog due to lack of use and the maintenance burden.

changelog.d/19258.misc

@@ -1 +0,0 @@
-Require 14 days to pass before pulling in general dependency updates to help mitigate upstream supply chain attacks.

changelog.d/19260.feature

@@ -1 +0,0 @@
-Add `memberships` endpoint to the admin API. This is useful for forensics and T&S purpose.

changelog.d/19262.misc

@@ -1 +0,0 @@
-Drop the broken netlify documentation workflow until a new one is implemented.

changelog.d/19267.bugfix

@@ -1 +0,0 @@
-Fix bug where `Duration` was logged incorrectly.

changelog.d/19268.feature

@@ -1 +0,0 @@
-Add an admin API for retrieving a paginated list of quarantined media.

changelog.d/19270.doc

@@ -1 +0,0 @@
-Document the importance of `public_baseurl` when configuring OpenID Connect authentication.

changelog.d/19274.bugfix

@@ -1 +0,0 @@
-Fix bug introduced in 1.143.0 that broke support for versions of `zope-interface` older than 6.2.

changelog.d/19275.feature

@@ -1 +0,0 @@
-Server admins can bypass the quarantine media check when downloading media by setting the `admin_unsafely_bypass_quarantine` query parameter to `true` on Client-Server API media download requests.

changelog.d/19278.misc

@@ -1 +0,0 @@
-Don't include debug logs in `Clock` unless explicitly enabled.

changelog.d/19279.feature

@@ -1 +0,0 @@
-Implemented pagination for the [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) mutual rooms endpoint. Contributed by @tulir @ Beeper.

changelog.d/19281.feature

@@ -1 +0,0 @@
-Admin API: add worker support to `GET /_synapse/admin/v2/users/<user_id>`.

changelog.d/19289.misc

@@ -1 +0,0 @@
-Use `uv` to test olddeps to ensure all transitive dependencies use minimum versions.

changelog.d/19297.misc

@@ -1 +0,0 @@
-Log the original bind exception when encountering `Failed to listen on 0.0.0.0, continuing because listening on [::]`.

changelog.d/19300.feature

@@ -1 +0,0 @@
-Improve proxy support for the `federation_client.py` dev script. Contributed by Denis Kasak (@dkasak).

changelog.d/19302.misc

@@ -1 +0,0 @@
-Unpin the version of Rust we use to build Synapse wheels (was 1.82.0) now that MacOS support has been dropped.

contrib/cmdclient/console.py

@@ -33,6 +33,7 @@ import sys
 import time
 import urllib
 from http import TwistedHttpClient
+from typing import Optional
 
 import urlparse
 from signedjson.key import NACL_ED25519, decode_verify_key_bytes
@@ -725,7 +726,7 @@ class SynapseCmd(cmd.Cmd):
         method,
         path,
         data=None,
-        query_params: dict | None = None,
+        query_params: Optional[dict] = None,
         alt_text=None,
     ):
         """Runs an HTTP request and pretty prints the output.

contrib/cmdclient/http.py

@@ -22,6 +22,7 @@
 import json
 import urllib
 from pprint import pformat
+from typing import Optional
 
 from twisted.internet import defer, reactor
 from twisted.web.client import Agent, readBody
@@ -89,7 +90,7 @@ class TwistedHttpClient(HttpClient):
         body = yield readBody(response)
         return json.loads(body)
 
-    def _create_put_request(self, url, json_data, headers_dict: dict | None = None):
+    def _create_put_request(self, url, json_data, headers_dict: Optional[dict] = None):
         """Wrapper of _create_request to issue a PUT request"""
         headers_dict = headers_dict or {}
 
@@ -100,7 +101,7 @@ class TwistedHttpClient(HttpClient):
             "PUT", url, producer=_JsonProducer(json_data), headers_dict=headers_dict
         )
 
-    def _create_get_request(self, url, headers_dict: dict | None = None):
+    def _create_get_request(self, url, headers_dict: Optional[dict] = None):
         """Wrapper of _create_request to issue a GET request"""
         return self._create_request("GET", url, headers_dict=headers_dict or {})
 
@@ -112,7 +113,7 @@ class TwistedHttpClient(HttpClient):
         data=None,
         qparams=None,
         jsonreq=True,
-        headers: dict | None = None,
+        headers: Optional[dict] = None,
     ):
         headers = headers or {}
 
@@ -137,7 +138,7 @@ class TwistedHttpClient(HttpClient):
 
     @defer.inlineCallbacks
     def _create_request(
-        self, method, url, producer=None, headers_dict: dict | None = None
+        self, method, url, producer=None, headers_dict: Optional[dict] = None
     ):
         """Creates and sends a request to the given url"""
         headers_dict = headers_dict or {}

contrib/grafana/synapse.json

@@ -2166,10 +2166,10 @@
               "datasource": {
                 "uid": "${DS_PROMETHEUS}"
               },
-              "expr": "rate(synapse_storage_events_persisted_events_sep_total{instance=\"$instance\",job=~\"$job\",index=~\"$index\"}[$bucket_size])",
+              "expr": "rate(synapse_storage_events_persisted_by_source_type{instance=\"$instance\",job=~\"$job\",index=~\"$index\"}[$bucket_size])",
               "format": "time_series",
               "intervalFactor": 2,
-              "legendFormat": "{{origin_type}}",
+              "legendFormat": "{{type}}",
               "refId": "D"
             }
           ],
@@ -2254,7 +2254,7 @@
               "datasource": {
                 "uid": "${DS_PROMETHEUS}"
               },
-              "expr": "sum by(type) (rate(synapse_storage_events_persisted_events_sep_total{job=~\"$job\",index=~\"$index\",instance=\"$instance\"}[$bucket_size]))",
+              "expr": "rate(synapse_storage_events_persisted_by_event_type{job=~\"$job\",index=~\"$index\",instance=\"$instance\"}[$bucket_size])",
               "format": "time_series",
               "instant": false,
               "intervalFactor": 2,
@@ -2294,6 +2294,99 @@
             "align": false
           }
         },
+        {
+          "aliasColors": {
+            "irc-freenode (local)": "#EAB839"
+          },
+          "bars": false,
+          "dashLength": 10,
+          "dashes": false,
+          "datasource": {
+            "uid": "${DS_PROMETHEUS}"
+          },
+          "decimals": 1,
+          "fill": 1,
+          "fillGradient": 0,
+          "gridPos": {
+            "h": 7,
+            "w": 12,
+            "x": 0,
+            "y": 44
+          },
+          "hiddenSeries": false,
+          "id": 44,
+          "legend": {
+            "alignAsTable": true,
+            "avg": false,
+            "current": false,
+            "hideEmpty": true,
+            "hideZero": true,
+            "max": false,
+            "min": false,
+            "show": true,
+            "total": false,
+            "values": false
+          },
+          "lines": true,
+          "linewidth": 1,
+          "links": [],
+          "nullPointMode": "null",
+          "options": {
+            "alertThreshold": true
+          },
+          "percentage": false,
+          "pluginVersion": "9.2.2",
+          "pointradius": 5,
+          "points": false,
+          "renderer": "flot",
+          "seriesOverrides": [],
+          "spaceLength": 10,
+          "stack": false,
+          "steppedLine": false,
+          "targets": [
+            {
+              "datasource": {
+                "uid": "${DS_PROMETHEUS}"
+              },
+              "expr": "rate(synapse_storage_events_persisted_by_origin{job=~\"$job\",index=~\"$index\",instance=\"$instance\"}[$bucket_size])",
+              "format": "time_series",
+              "intervalFactor": 2,
+              "legendFormat": "{{origin_entity}} ({{origin_type}})",
+              "refId": "A",
+              "step": 20
+            }
+          ],
+          "thresholds": [],
+          "timeRegions": [],
+          "title": "Events/s by Origin",
+          "tooltip": {
+            "shared": false,
+            "sort": 2,
+            "value_type": "individual"
+          },
+          "type": "graph",
+          "xaxis": {
+            "mode": "time",
+            "show": true,
+            "values": []
+          },
+          "yaxes": [
+            {
+              "format": "hertz",
+              "logBase": 1,
+              "min": "0",
+              "show": true
+            },
+            {
+              "format": "short",
+              "logBase": 1,
+              "show": true
+            }
+          ],
+          "yaxis": {
+            "align": false
+          }
+        },
         {
           "aliasColors": {},
           "bars": false,

contrib/prometheus/synapse-v2.rules

@@ -44,3 +44,31 @@ groups:
   ###
   ### End of 'Prometheus Console Only' rules block
   ###
+
+
+  ###
+  ### Grafana Only
+  ### The following rules are only needed if you use the Grafana dashboard
+  ### in contrib/grafana/synapse.json
+  ###
+  - record: synapse_storage_events_persisted_by_source_type
+    expr: sum without(type, origin_type, origin_entity) (synapse_storage_events_persisted_events_sep_total{origin_type="remote"})
+    labels:
+      type: remote
+  - record: synapse_storage_events_persisted_by_source_type
+    expr: sum without(type, origin_type, origin_entity) (synapse_storage_events_persisted_events_sep_total{origin_entity="*client*",origin_type="local"})
+    labels:
+      type: local
+  - record: synapse_storage_events_persisted_by_source_type
+    expr: sum without(type, origin_type, origin_entity) (synapse_storage_events_persisted_events_sep_total{origin_entity!="*client*",origin_type="local"})
+    labels:
+      type: bridges
+
+  - record: synapse_storage_events_persisted_by_event_type
+    expr: sum without(origin_entity, origin_type) (synapse_storage_events_persisted_events_sep_total)
+
+  - record: synapse_storage_events_persisted_by_origin
+    expr: sum without(type) (synapse_storage_events_persisted_events_sep_total)
+  ###
+  ### End of 'Grafana Only' rules block
+  ###

debian/changelog

@@ -1,69 +1,3 @@
-matrix-synapse-py3 (1.144.0) stable; urgency=medium
-
-  * New Synapse release 1.144.0.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 09 Dec 2025 08:30:40 -0700
-
-matrix-synapse-py3 (1.144.0~rc1) stable; urgency=medium
-
-  * New Synapse release 1.144.0rc1.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 02 Dec 2025 09:11:19 -0700
-
-matrix-synapse-py3 (1.143.0) stable; urgency=medium
-
-  * New Synapse release 1.143.0.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 25 Nov 2025 08:44:56 -0700
-
-matrix-synapse-py3 (1.143.0~rc2) stable; urgency=medium
-
-  * New Synapse release 1.143.0rc2.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 18 Nov 2025 17:36:08 -0700
-
-matrix-synapse-py3 (1.143.0~rc1) stable; urgency=medium
-
-  * New Synapse release 1.143.0rc1.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 18 Nov 2025 13:08:39 -0700
-
-matrix-synapse-py3 (1.142.1) stable; urgency=medium
-
-  * New Synapse release 1.142.1.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 18 Nov 2025 12:25:23 -0700
-
-matrix-synapse-py3 (1.142.0) stable; urgency=medium
-
-  * New Synapse release 1.142.0.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 11 Nov 2025 09:45:51 +0000
-
-matrix-synapse-py3 (1.142.0~rc4) stable; urgency=medium
-
-  * New Synapse release 1.142.0rc4.
-
- -- Synapse Packaging team <packages@matrix.org>  Fri, 07 Nov 2025 10:54:42 +0000
-
-matrix-synapse-py3 (1.142.0~rc3) stable; urgency=medium
-
-  * New Synapse release 1.142.0rc3.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Nov 2025 17:39:11 +0000
-
-matrix-synapse-py3 (1.142.0~rc2) stable; urgency=medium
-
-  * New Synapse release 1.142.0rc2.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Nov 2025 16:21:30 +0000
-
-matrix-synapse-py3 (1.142.0~rc1) stable; urgency=medium
-
-  * New Synapse release 1.142.0rc1.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 04 Nov 2025 13:20:15 +0000
-
 matrix-synapse-py3 (1.141.0) stable; urgency=medium
 
   * New Synapse release 1.141.0.

docker/complement/Dockerfile

@@ -11,7 +11,7 @@ ARG SYNAPSE_VERSION=latest
 ARG FROM=matrixdotorg/synapse-workers:$SYNAPSE_VERSION
 ARG DEBIAN_VERSION=trixie
 
-FROM docker.io/library/postgres:14-${DEBIAN_VERSION} AS postgres_base
+FROM docker.io/library/postgres:13-${DEBIAN_VERSION} AS postgres_base
 
 FROM $FROM
 # First of all, we copy postgres server from the official postgres image,
@@ -26,7 +26,7 @@ RUN adduser --system --uid 999 postgres --home /var/lib/postgresql
 COPY --from=postgres_base /usr/lib/postgresql /usr/lib/postgresql
 COPY --from=postgres_base /usr/share/postgresql /usr/share/postgresql
 COPY --from=postgres_base --chown=postgres /var/run/postgresql /var/run/postgresql
-ENV PATH="${PATH}:/usr/lib/postgresql/14/bin"
+ENV PATH="${PATH}:/usr/lib/postgresql/13/bin"
 ENV PGDATA=/var/lib/postgresql/data
 
 # We also initialize the database at build time, rather than runtime, so that it's faster to spin up the image.

docker/configure_workers_and_start.py

@@ -68,6 +68,7 @@ from typing import (
     Mapping,
     MutableMapping,
     NoReturn,
+    Optional,
     SupportsIndex,
 )
 
@@ -196,7 +197,6 @@ WORKERS_CONFIG: dict[str, dict[str, Any]] = {
             "^/_matrix/client/(api/v1|r0|v3|unstable)/keys/upload",
             "^/_matrix/client/(api/v1|r0|v3|unstable)/keys/device_signing/upload$",
             "^/_matrix/client/(api/v1|r0|v3|unstable)/keys/signatures/upload$",
-            "^/_matrix/client/unstable/org.matrix.msc4140/delayed_events(/.*/restart)?$",
         ],
         "shared_extra_conf": {},
         "worker_extra_conf": "",
@@ -468,7 +468,7 @@ def add_worker_roles_to_shared_config(
 
 
 def merge_worker_template_configs(
-    existing_dict: dict[str, Any] | None,
+    existing_dict: Optional[dict[str, Any]],
     to_be_merged_dict: dict[str, Any],
 ) -> dict[str, Any]:
     """When given an existing dict of worker template configuration consisting with both
@@ -1026,7 +1026,7 @@ def generate_worker_log_config(
     Returns: the path to the generated file
     """
     # Check whether we should write worker logs to disk, in addition to the console
-    extra_log_template_args: dict[str, str | None] = {}
+    extra_log_template_args: dict[str, Optional[str]] = {}
     if environ.get("SYNAPSE_WORKERS_WRITE_LOGS_TO_DISK"):
         extra_log_template_args["LOG_FILE_PATH"] = f"{data_dir}/logs/{worker_name}.log"
 

docker/start.py

@@ -6,7 +6,7 @@ import os
 import platform
 import subprocess
 import sys
-from typing import Any, Mapping, MutableMapping, NoReturn
+from typing import Any, Mapping, MutableMapping, NoReturn, Optional
 
 import jinja2
 
@@ -50,7 +50,7 @@ def generate_config_from_template(
     config_dir: str,
     config_path: str,
     os_environ: Mapping[str, str],
-    ownership: str | None,
+    ownership: Optional[str],
 ) -> None:
     """Generate a homeserver.yaml from environment variables
 
@@ -147,7 +147,7 @@ def generate_config_from_template(
     subprocess.run(args, check=True)
 
 
-def run_generate_config(environ: Mapping[str, str], ownership: str | None) -> None:
+def run_generate_config(environ: Mapping[str, str], ownership: Optional[str]) -> None:
     """Run synapse with a --generate-config param to generate a template config file
 
     Args:

docs/SUMMARY.md

@@ -5,7 +5,6 @@
 
 # Setup
   - [Installation](setup/installation.md)
-  - [Security](setup/security.md)
   - [Using Postgres](postgres.md)
   - [Configuring a Reverse Proxy](reverse_proxy.md)
   - [Configuring a Forward/Outbound Proxy](setup/forward_proxy.md)

docs/admin_api/media_admin_api.md

@@ -73,33 +73,6 @@ Response:
 }
 ```
 
-## Listing all quarantined media
-
-This API returns a list of all quarantined media on the server. It is paginated, and can be scoped to either local or
-remote media. Note that the pagination values are also scoped to the request parameters - changing them but keeping the
-same pagination values will result in unexpected results.
-
-Request:
-```http
-GET /_synapse/admin/v1/media/quarantined?from=0&limit=100&kind=local
-```
-
-`from` and `limit` are optional parameters, and default to `0` and `100` respectively. They are the row index and number
-of rows to return - they are not timestamps.
-
-`kind` *MUST* either be `local` or `remote`.
-
-The API returns a JSON body containing MXC URIs for the quarantined media, like the following:
-
-```json
-{
-  "media": [
-    "mxc://localhost/xwvutsrqponmlkjihgfedcba",
-    "mxc://localhost/abcdefghijklmnopqrstuvwx"
-  ]
-}
-```
-
 # Quarantine media
 
 Quarantining media means that it is marked as inaccessible by users. It applies
@@ -115,20 +88,6 @@ is quarantined, Synapse will:
  - Quarantine any existing cached remote media.
  - Quarantine any future remote media.
 
-## Downloading quarantined media
-
-Normally, when media is quarantined, it will return a 404 error when downloaded.
-Admins can bypass this by adding `?admin_unsafely_bypass_quarantine=true`
-to the [normal download URL](https://spec.matrix.org/v1.16/client-server-api/#get_matrixclientv1mediadownloadservernamemediaid).
-
-Bypassing the quarantine check is not recommended. Media is typically quarantined
-to prevent harmful content from being served to users, which includes admins. Only
-set the bypass parameter if you intentionally want to access potentially harmful
-content.
-
-Non-admin users cannot bypass quarantine checks, even when specifying the above
-query parameter.
-
 ## Quarantining media by ID
 
 This API quarantines a single piece of local or remote media.

docs/admin_api/user_admin_api.md

@@ -505,55 +505,6 @@ with a body of:
 }
 ```
 
-## List room memberships of a user
-
-Gets a list of room memberships for a specific `user_id`. This
-endpoint differs from
-[`GET /_synapse/admin/v1/users/<user_id>/joined_rooms`](#list-joined-rooms-of-a-user)
-in that it returns rooms with memberships other than "join".
-
-The API is:
-
-```
-GET /_synapse/admin/v1/users/<user_id>/memberships
-```
-
-A response body like the following is returned:
-
-```json
-    {
-        "memberships": {
-            "!DuGcnbhHGaSZQoNQR:matrix.org": "join",
-            "!ZtSaPCawyWtxfWiIy:matrix.org": "leave",
-        }
-    }
-```
-
-which is a list of room membership states for the given user. This endpoint can
-be used with both local and remote users, with the caveat that the homeserver will
-only be aware of the memberships for rooms that one of its local users has joined.
-
-Remote user memberships may also be out of date if all local users have since left
-a room. The homeserver will thus no longer receive membership updates about it.
-
-The list includes rooms that the user has since left; other membership states (knock,
-invite, etc.) are also possible.
-
-Note that rooms will only disappear from this list if they are
-[purged](./rooms.md#delete-room-api) from the homeserver.
-
-**Parameters**
-
-The following parameters should be set in the URL:
-
-- `user_id` - fully qualified: for example, `@user:server.com`.
-
-**Response**
-
-The following fields are returned in the JSON response body:
-
-- `memberships` - A map of `room_id` (string) to `membership` state (string).
-
 ## List joined rooms of a user
 
 Gets a list of all `room_id` that a specific `user_id` is joined to and is a member of (participating in).

docs/development/synapse_architecture/cancellation.md

@@ -299,7 +299,7 @@ logcontext is not finished before the `async` processing completes.
 
 **Bad**:
 ```python
-cache: ObservableDeferred[None] | None = None
+cache: Optional[ObservableDeferred[None]] = None
 
 async def do_something_else(
     to_resolve: Deferred[None]
@@ -326,7 +326,7 @@ with LoggingContext("request-1"):
 
 **Good**:
 ```python
-cache: ObservableDeferred[None] | None = None
+cache: Optional[ObservableDeferred[None]] = None
 
 async def do_something_else(
     to_resolve: Deferred[None]
@@ -358,7 +358,7 @@ with LoggingContext("request-1"):
 
 **OK**:
 ```python
-cache: ObservableDeferred[None] | None = None
+cache: Optional[ObservableDeferred[None]] = None
 
 async def do_something_else(
     to_resolve: Deferred[None]

docs/development/synapse_architecture/streams.md

@@ -1,4 +1,4 @@
-# Streams
+## Streams
 
 Synapse has a concept of "streams", which are roughly described in [`id_generators.py`](
     https://github.com/element-hq/synapse/blob/develop/synapse/storage/util/id_generators.py
@@ -19,7 +19,7 @@ To that end, let's describe streams formally, paraphrasing from the docstring of
     https://github.com/element-hq/synapse/blob/a719b703d9bd0dade2565ddcad0e2f3a7a9d4c37/synapse/storage/util/id_generators.py#L96
 ).
 
-## Definition
+### Definition
 
 A stream is an append-only log `T1, T2, ..., Tn, ...` of facts[^1] which grows over time.
 Only "writers" can add facts to a stream, and there may be multiple writers.
@@ -47,7 +47,7 @@ But unhappy cases (e.g. transaction rollback due to an error) also count as comp
 Once completed, the rows written with that stream ID are fixed, and no new rows
 will be inserted with that ID.
 
-## Current stream ID
+### Current stream ID
 
 For any given stream reader (including writers themselves), we may define a per-writer current stream ID:
 
@@ -93,7 +93,7 @@ Consider a single-writer stream which is initially at ID 1.
 | Complete 6 | 6                 |                                                 |
 
 
-## Multi-writer streams
+### Multi-writer streams
 
 There are two ways to view a multi-writer stream.
 
@@ -115,7 +115,7 @@ The facts this stream holds are instructions to "you should now invalidate these
 We only ever treat this as a multiple single-writer streams as there is no important ordering between cache invalidations.
 (Invalidations are self-contained facts; and the invalidations commute/are idempotent).
 
-## Writing to streams
+### Writing to streams
 
 Writers need to track:
  - track their current position (i.e. its own per-writer stream ID).
@@ -133,7 +133,7 @@ To complete a fact, first remove it from your map of facts currently awaiting co
 Then, if no earlier fact is awaiting completion, the writer can advance its current position in that stream.
 Upon doing so it should emit an `RDATA` message[^3], once for every fact between the old and the new stream ID.
 
-## Subscribing to streams
+### Subscribing to streams
 
 Readers need to track the current position of every writer.
 
@@ -146,44 +146,10 @@ The `RDATA` itself is not a self-contained representation of the fact;
 readers will have to query the stream tables for the full details.
 Readers must also advance their record of the writer's current position for that stream.
 
-## Summary
+# Summary
 
 In a nutshell: we have an append-only log with a "buffer/scratchpad" at the end where we have to wait for the sequence to be linear and contiguous.
 
----
-
-## Cheatsheet for creating a new stream
-
-These rough notes and links may help you to create a new stream and add all the
-necessary registration and event handling.
-
-**Create your stream:**
-- [create a stream class and stream row class](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/replication/tcp/streams/_base.py#L728)
-  - will need an [ID generator](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/storage/databases/main/thread_subscriptions.py#L75)
-    - may need [writer configuration](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/config/workers.py#L177), if there isn't already an obvious source of configuration for which workers should be designated as writers to your new stream.
-      - if adding new writer configuration, add Docker-worker configuration, which lets us configure the writer worker in Complement tests: [[1]](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/docker/configure_workers_and_start.py#L331), [[2]](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/docker/configure_workers_and_start.py#L440)
-- most of the time, you will likely introduce a new datastore class for the concept represented by the new stream, unless there is already an obvious datastore that covers it.
-- consider whether it may make sense to introduce a handler
-
-**Register your stream in:**
-- [`STREAMS_MAP`](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/replication/tcp/streams/__init__.py#L71)
-
-**Advance your stream in:**
-- [`process_replication_position` of your appropriate datastore](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/storage/databases/main/thread_subscriptions.py#L111)
-  - don't forget the super call
-
-**If you're going to do any caching that needs invalidation from new rows:**
-- add invalidations to [`process_replication_rows` of your appropriate datastore](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/storage/databases/main/thread_subscriptions.py#L91)
-  - don't forget the super call
-- add local-only [invalidations to your writer transactions](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/storage/databases/main/thread_subscriptions.py#L201)
-
-**For streams to be used in sync:**
-- add a new field to [`StreamToken`](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/types/__init__.py#L1003)
-  - add a new [`StreamKeyType`](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/types/__init__.py#L999)
-- add appropriate wake-up rules
-  - in [`on_rdata`](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/replication/tcp/client.py#L260)
-  - locally on the same worker when completing a write, [e.g. in your handler](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/handlers/thread_subscriptions.py#L139)
-- add the stream in [`bound_future_token`](https://github.com/element-hq/synapse/blob/4367fb2d078c52959aeca0fe6874539c53e8360d/synapse/streams/events.py#L127)
 
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