---
date: 2023-11-29T10:04:26-07:00
---
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This is a header file for the generated changelog.

Variables:
    v1.9  = Replaced by the version number (eg: v1.2)
    November 29, 2023     = Replaced by the date (eg: April 01, 2021)
-->

## v1.9

<table class="release-info">
<tr><th>Git commit</th><td><a href="https://github.com/matrix-org/matrix-spec/tree/v1.9">https://github.com/matrix-org/matrix-spec/tree/v1.9</a></td>
<tr><th>Release date</th><td>November 29, 2023</td>
</table>

<!-- Intentionally blank line to ensure headers work in the concatenated changelog -->

### Client-Server API

**Backwards Compatible Changes**

- Add the `m.rule.suppress_edits` default push rule, as per [MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958). ([#1617](https://github.com/matrix-org/matrix-spec/issues/1617))

**Spec Clarifications**

- Fix `m.call.negotiate` schema and example. ([#1546](https://github.com/matrix-org/matrix-spec/issues/1546))
- Clarify that the `via` property is required for `m.space.parent` and `m.space.child` as per [MSC1772](https://github.com/matrix-org/matrix-spec-proposals/pull/1772). Contributed by @PaarthShah. ([#1618](https://github.com/matrix-org/matrix-spec/issues/1618))
- Add a note to the `/publicRooms` API that the server name is case sensitive. ([#1638](https://github.com/matrix-org/matrix-spec/issues/1638))
- Clarify that an `m.room.name` event with an absent `name` field is not expected behavior. ([#1639](https://github.com/matrix-org/matrix-spec/issues/1639))
- Fix schemas used for account data and presence events in `GET /initialSync`. ([#1647](https://github.com/matrix-org/matrix-spec/issues/1647))
- Fix various typos throughout the specification. ([#1658](https://github.com/matrix-org/matrix-spec/issues/1658), [#1661](https://github.com/matrix-org/matrix-spec/issues/1661), [#1665](https://github.com/matrix-org/matrix-spec/issues/1665))
- Fix `.m.rule.suppress_notices` push rule not being valid JSON. ([#1671](https://github.com/matrix-org/matrix-spec/issues/1671))
- Add missing properties for `event_property_is` and `event_property_contains` push conditions to `PushConditions` object. ([#1673](https://github.com/matrix-org/matrix-spec/issues/1673))
- Indicate that fallback keys should have a `fallback` property set to `true`. ([#1676](https://github.com/matrix-org/matrix-spec/issues/1676))
- Clarify that thread roots are not considered within the thread. ([#1677](https://github.com/matrix-org/matrix-spec/issues/1677))


### Server-Server API

**Spec Clarifications**

- Fix schema of `m.receipt` EDU. ([#1636](https://github.com/matrix-org/matrix-spec/issues/1636))
- Fix various typos throughout the specification. ([#1661](https://github.com/matrix-org/matrix-spec/issues/1661))
- Clarify that federation requests for non-local users are invalid. ([#1672](https://github.com/matrix-org/matrix-spec/issues/1672))


### Application Service API

No significant changes.


### Identity Service API

No significant changes.


### Push Gateway API

No significant changes.


### Room Versions

No significant changes.


### Appendices

**Spec Clarifications**

- Clarify timestamp specification with respect to leap seconds. ([#1627](https://github.com/matrix-org/matrix-spec/issues/1627))
- Fix various typos throughout the specification. ([#1652](https://github.com/matrix-org/matrix-spec/issues/1652))


### Internal Changes/Tooling

**Backwards Compatible Changes**

- Add more CI checks for OpenAPI definitions and JSON Schemas. ([#1656](https://github.com/matrix-org/matrix-spec/issues/1656))
- Generate server-server OpenAPI definition. ([#1657](https://github.com/matrix-org/matrix-spec/issues/1657))

**Spec Clarifications**

- Replace all mentions of Swagger by OpenAPI. ([#1633](https://github.com/matrix-org/matrix-spec/issues/1633))
- Fix enum types in JSON schemas. ([#1634](https://github.com/matrix-org/matrix-spec/issues/1634))
- Fix schema of `m.mentions` object. ([#1635](https://github.com/matrix-org/matrix-spec/issues/1635))
- Fix rendering of `m.receipt` event in Client-Server API. ([#1637](https://github.com/matrix-org/matrix-spec/issues/1637))
- Remove required `fieldname` in appservice Protocol definition. ([#1646](https://github.com/matrix-org/matrix-spec/issues/1646))
- Fix github action workflow responsible for releasing of @matrix-org/spec package. ([#1648](https://github.com/matrix-org/matrix-spec/issues/1648))
- Upgrade GitHub actions. ([#1660](https://github.com/matrix-org/matrix-spec/issues/1660))