--- title: v1.15 Changelog linkTitle: v1.15 type: docs layout: changelog outputs: - html - checklist date: 2025-06-26 --- ## Client-Server API **New Endpoints** - Add `GET /_matrix/client/v1/room_summary/{roomIdOrAlias}`, as per [MSC3266](https://github.com/matrix-org/matrix-spec-proposals/pull/3266). ([#2125](https://github.com/matrix-org/matrix-spec/issues/2125)) - Add `GET /_matrix/client/v1/auth_metadata`, as per [MSC2965](https://github.com/matrix-org/matrix-spec-proposals/pull/2965). ([#2147](https://github.com/matrix-org/matrix-spec/issues/2147)) **Backwards Compatible Changes** - Add `m.topic` content block to enable rich text in `m.room.topic` events as per [MSC3765](https://github.com/matrix-org/matrix-spec-proposals/pull/3765). ([#2095](https://github.com/matrix-org/matrix-spec/issues/2095)) - Include device keys with Olm-encrypted events as per [MSC4147](https://github.com/matrix-org/matrix-spec-proposals/pull/4147). ([#2122](https://github.com/matrix-org/matrix-spec/issues/2122)) - Add `/_matrix/client/v1/room_summary/{roomIdOrAlias}` and extend `/_matrix/client/v1/rooms/{roomId}/hierarchy` with the new optional properties `allowed_room_ids`, `encryption` and `room_version` as per [MSC3266](https://github.com/matrix-org/matrix-spec-proposals/pull/3266). ([#2125](https://github.com/matrix-org/matrix-spec/issues/2125), [#2158](https://github.com/matrix-org/matrix-spec/issues/2158)) - Add the OAuth 2.0 based authentication API, as per [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) and its sub-proposals. ([#2141](https://github.com/matrix-org/matrix-spec/issues/2141), [#2148](https://github.com/matrix-org/matrix-spec/issues/2148), [#2149](https://github.com/matrix-org/matrix-spec/issues/2149), [#2150](https://github.com/matrix-org/matrix-spec/issues/2150), [#2151](https://github.com/matrix-org/matrix-spec/issues/2151), [#2159](https://github.com/matrix-org/matrix-spec/issues/2159), [#2164](https://github.com/matrix-org/matrix-spec/issues/2164)) **Spec Clarifications** - Clarify behaviour when the `topic` key of a `m.room.topic` event is absent, null, or empty. ([#2068](https://github.com/matrix-org/matrix-spec/issues/2068)) - Fix the example of the `GET /sync` endpoint and the `m.room.member` example used in several places. ([#2077](https://github.com/matrix-org/matrix-spec/issues/2077)) - Clarify the format of third-party invites, including the fact that identity server public keys can be encoded using standard or URL-safe base64. ([#2083](https://github.com/matrix-org/matrix-spec/issues/2083)) - "Public" rooms in profile look-ups are defined through their join rule and history visibility. ([#2101](https://github.com/matrix-org/matrix-spec/issues/2101)) - "Public" rooms in user directory queries are defined through their join rule and history visibility. ([#2102](https://github.com/matrix-org/matrix-spec/issues/2102)) - Rooms published in `/publicRooms` don't necessarily have `public` join rules or `world_readable` history visibility. ([#2104](https://github.com/matrix-org/matrix-spec/issues/2104)) - "Public" rooms with respect to call invites are defined through their join rule. ([#2106](https://github.com/matrix-org/matrix-spec/issues/2106)) - "Public" rooms have no specific meaning with respect to moderation policy lists. ([#2107](https://github.com/matrix-org/matrix-spec/issues/2107)) - "Public" rooms with respect to presence are defined through their join rule. ([#2108](https://github.com/matrix-org/matrix-spec/issues/2108)) - Spaces are subject to the same access mechanisms as rooms. ([#2109](https://github.com/matrix-org/matrix-spec/issues/2109)) - Fix various typos throughout the specification. ([#2121](https://github.com/matrix-org/matrix-spec/issues/2121), [#2144](https://github.com/matrix-org/matrix-spec/issues/2144)) - Clarify that Well-Known URIs are available on the server name's hostname. Contributed by @HarHarLinks. ([#2140](https://github.com/matrix-org/matrix-spec/issues/2140)) - Add missing fields in example for `ExportedSessionData`. ([#2154](https://github.com/matrix-org/matrix-spec/issues/2154)) ## Server-Server API **Backwards Compatible Changes** - Add `m.topic` content block to enable rich text in `m.room.topic` events as per [MSC3765](https://github.com/matrix-org/matrix-spec-proposals/pull/3765). ([#2095](https://github.com/matrix-org/matrix-spec/issues/2095)) - Extend `/_matrix/federation/v1/hierarchy/{roomId}` with the new optional properties `encryption` and `room_version` as per [MSC3266](https://github.com/matrix-org/matrix-spec-proposals/pull/3266). ([#2125](https://github.com/matrix-org/matrix-spec/issues/2125)) **Spec Clarifications** - Add a note to the invite endpoints that invites to local users may be received twice over federation if the homeserver is already in the room. ([#2067](https://github.com/matrix-org/matrix-spec/issues/2067)) - Clarify the format of third-party invites, including the fact that identity server public keys can be encoded using standard or URL-safe base64. ([#2083](https://github.com/matrix-org/matrix-spec/issues/2083)) - Clarify that auth event of `content.join_authorised_via_users_server` is only necessary for `m.room.member` with a `membership` of `join`. ([#2100](https://github.com/matrix-org/matrix-spec/issues/2100)) - Rooms published in `/publicRooms` don't necessarily have `public` join rules or `world_readable` history visibility. ([#2104](https://github.com/matrix-org/matrix-spec/issues/2104)) - Fix various typos throughout the specification. ([#2128](https://github.com/matrix-org/matrix-spec/issues/2128)) - Clarify that Well-Known URIs are available on the server name's hostname. Contributed by @HarHarLinks. ([#2140](https://github.com/matrix-org/matrix-spec/issues/2140)) ## Application Service API **Spec Clarifications** - Clarify in the application service registration schema the `url: null` behaviour. ([#2130](https://github.com/matrix-org/matrix-spec/issues/2130)) ## Identity Service API **Spec Clarifications** - Clarify that public keys can be encoded using standard or URL-safe base64. ([#2083](https://github.com/matrix-org/matrix-spec/issues/2083)) ## Push Gateway API No significant changes. ## Room Versions No significant changes. ## Appendices No significant changes. ## Internal Changes/Tooling **Spec Clarifications** - Adjust margins in rendered endpoints. ([#2081](https://github.com/matrix-org/matrix-spec/issues/2081)) - Replace Hugo shortcodes in OpenAPI output. ([#2088](https://github.com/matrix-org/matrix-spec/issues/2088)) - Add [well-known funding manifest urls](https://floss.fund/funding-manifest/) to spec to authorise https://matrix.org/funding.json. Contributed by @HarHarLinks. ([#2115](https://github.com/matrix-org/matrix-spec/issues/2115)) - Fix the historical info box when generating the historical spec in CI. ([#2123](https://github.com/matrix-org/matrix-spec/issues/2123)) - Update the header navigation menu with links to modern matrix.org. Contributed by @HarHarLinks. ([#2137](https://github.com/matrix-org/matrix-spec/issues/2137))