- Support for [MSC4235](https://github.com/matrix-org/matrix-spec-proposals/pull/4235): `via` query param for hierarchy endpoint. Contributed by Krishan (@kfiven). ([\#18070](https://github.com/element-hq/synapse/issues/18070)) - Add `forget_forced_upon_leave` capability as per [MSC4267](https://github.com/matrix-org/matrix-spec-proposals/pull/4267). ([\#18196](https://github.com/element-hq/synapse/issues/18196)) - Add `federated_user_may_invite` spam checker callback which receives the entire invite event. Contributed by @tulir @ Beeper. ([\#18241](https://github.com/element-hq/synapse/issues/18241)) - Fix `KeyError` on background updates when using split main/state databases. ([\#18509](https://github.com/element-hq/synapse/issues/18509)) - Improve performance of device deletion by adding missing index. ([\#18582](https://github.com/element-hq/synapse/issues/18582)) - Fix `avatar_url` and `displayname` being sent on federation profile queries when they are not set. ([\#18593](https://github.com/element-hq/synapse/issues/18593)) - Respond with 401 & `M_USER_LOCKED` when a locked user calls `POST /login`, as per the spec. ([\#18594](https://github.com/element-hq/synapse/issues/18594)) - Ensure policy servers are not asked to scan policy server change events, allowing rooms to disable the use of a policy server while the policy server is down. ([\#18605](https://github.com/element-hq/synapse/issues/18605)) - Fix documentation of the Delete Room Admin API's status field. ([\#18519](https://github.com/element-hq/synapse/issues/18519)) - Stop adding the "origin" field to newly-created events (PDUs). ([\#18418](https://github.com/element-hq/synapse/issues/18418)) - Replace `PyICU` crate with equivalent `icu_segmenter` Rust crate. ([\#18553](https://github.com/element-hq/synapse/issues/18553), [\#18646](https://github.com/element-hq/synapse/issues/18646)) - Improve docstring on `simple_upsert_many`. ([\#18573](https://github.com/element-hq/synapse/issues/18573)) - Raise poetry-core version cap to 2.1.3. ([\#18575](https://github.com/element-hq/synapse/issues/18575)) - Raise setuptools_rust version cap to 1.11.1. ([\#18576](https://github.com/element-hq/synapse/issues/18576)) - Better handling of ratelimited requests. ([\#18595](https://github.com/element-hq/synapse/issues/18595), [\#18600](https://github.com/element-hq/synapse/issues/18600)) - Update to Rust 1.87.0 in CI, and bump the pinned commit of the `dtolnay/rust-toolchain` GitHub Action to `b3b07ba8b418998c39fb20f53e8b695cdcc8de1b`. ([\#18596](https://github.com/element-hq/synapse/issues/18596)) - Speed up bulk device deletion. ([\#18602](https://github.com/element-hq/synapse/issues/18602)) - Speed up the building of arm-based wheels in CI. ([\#18618](https://github.com/element-hq/synapse/issues/18618)) - Speed up the building of Docker images in CI. ([\#18620](https://github.com/element-hq/synapse/issues/18620)) - Add `.zed/` directory to `.gitignore`. ([\#18623](https://github.com/element-hq/synapse/issues/18623)) - Log the room ID we're purging state for. ([\#18625](https://github.com/element-hq/synapse/issues/18625)) * Bump Swatinem/rust-cache from 2.7.8 to 2.8.0. ([\#18612](https://github.com/element-hq/synapse/issues/18612)) * Bump attrs from 24.2.0 to 25.3.0. ([\#18649](https://github.com/element-hq/synapse/issues/18649)) * Bump authlib from 1.5.2 to 1.6.0. ([\#18642](https://github.com/element-hq/synapse/issues/18642)) * Bump base64 from 0.21.7 to 0.22.1. ([\#18589](https://github.com/element-hq/synapse/issues/18589)) * Bump base64 from 0.21.7 to 0.22.1. ([\#18629](https://github.com/element-hq/synapse/issues/18629)) * Bump docker/build-push-action from 6.17.0 to 6.18.0. ([\#18497](https://github.com/element-hq/synapse/issues/18497)) * Bump docker/setup-buildx-action from 3.10.0 to 3.11.1. ([\#18587](https://github.com/element-hq/synapse/issues/18587)) * Bump hiredis from 3.1.0 to 3.2.1. ([\#18638](https://github.com/element-hq/synapse/issues/18638)) * Bump ijson from 3.3.0 to 3.4.0. ([\#18650](https://github.com/element-hq/synapse/issues/18650)) * Bump jsonschema from 4.23.0 to 4.24.0. ([\#18630](https://github.com/element-hq/synapse/issues/18630)) * Bump msgpack from 1.1.0 to 1.1.1. ([\#18651](https://github.com/element-hq/synapse/issues/18651)) * Bump mypy-zope from 1.0.11 to 1.0.12. ([\#18640](https://github.com/element-hq/synapse/issues/18640)) * Bump phonenumbers from 9.0.2 to 9.0.8. ([\#18652](https://github.com/element-hq/synapse/issues/18652)) * Bump pillow from 11.2.1 to 11.3.0. ([\#18624](https://github.com/element-hq/synapse/issues/18624)) * Bump prometheus-client from 0.21.0 to 0.22.1. ([\#18609](https://github.com/element-hq/synapse/issues/18609)) * Bump pyasn1-modules from 0.4.1 to 0.4.2. ([\#18495](https://github.com/element-hq/synapse/issues/18495)) * Bump pydantic from 2.11.4 to 2.11.7. ([\#18639](https://github.com/element-hq/synapse/issues/18639)) * Bump reqwest from 0.12.15 to 0.12.20. ([\#18590](https://github.com/element-hq/synapse/issues/18590)) * Bump reqwest from 0.12.20 to 0.12.22. ([\#18627](https://github.com/element-hq/synapse/issues/18627)) * Bump ruff from 0.11.11 to 0.12.1. ([\#18645](https://github.com/element-hq/synapse/issues/18645)) * Bump ruff from 0.12.1 to 0.12.2. ([\#18657](https://github.com/element-hq/synapse/issues/18657)) * Bump sentry-sdk from 2.22.0 to 2.32.0. ([\#18633](https://github.com/element-hq/synapse/issues/18633)) * Bump setuptools-rust from 1.10.2 to 1.11.1. ([\#18655](https://github.com/element-hq/synapse/issues/18655)) * Bump sigstore/cosign-installer from 3.8.2 to 3.9.0. ([\#18588](https://github.com/element-hq/synapse/issues/18588)) * Bump sigstore/cosign-installer from 3.9.0 to 3.9.1. ([\#18608](https://github.com/element-hq/synapse/issues/18608)) * Bump stefanzweifel/git-auto-commit-action from 5.2.0 to 6.0.1. ([\#18607](https://github.com/element-hq/synapse/issues/18607)) * Bump tokio from 1.45.1 to 1.46.0. ([\#18628](https://github.com/element-hq/synapse/issues/18628)) * Bump tokio from 1.46.0 to 1.46.1. ([\#18667](https://github.com/element-hq/synapse/issues/18667)) * Bump treq from 24.9.1 to 25.5.0. ([\#18610](https://github.com/element-hq/synapse/issues/18610)) * Bump types-bleach from 6.2.0.20241123 to 6.2.0.20250514. ([\#18634](https://github.com/element-hq/synapse/issues/18634)) * Bump types-jsonschema from 4.23.0.20250516 to 4.24.0.20250528. ([\#18611](https://github.com/element-hq/synapse/issues/18611)) * Bump types-opentracing from 2.4.10.6 to 2.4.10.20250622. ([\#18586](https://github.com/element-hq/synapse/issues/18586)) * Bump types-psycopg2 from 2.9.21.20250318 to 2.9.21.20250516. ([\#18658](https://github.com/element-hq/synapse/issues/18658)) * Bump types-pyyaml from 6.0.12.20241230 to 6.0.12.20250516. ([\#18643](https://github.com/element-hq/synapse/issues/18643)) * Bump types-setuptools from 75.2.0.20241019 to 80.9.0.20250529. ([\#18644](https://github.com/element-hq/synapse/issues/18644)) * Bump typing-extensions from 4.12.2 to 4.14.0. ([\#18654](https://github.com/element-hq/synapse/issues/18654)) * Bump typing-extensions from 4.14.0 to 4.14.1. ([\#18668](https://github.com/element-hq/synapse/issues/18668)) * Bump urllib3 from 2.2.2 to 2.5.0. ([\#18572](https://github.com/element-hq/synapse/issues/18572))