matrix-org / matrix-org/matrix-spec

It is unclear how room IDs inside `leave` with no additional information should be interpreted

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clarification
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Description

**Link to problem area**: https://spec.matrix.org/v1.2/client-server-api/#get_matrixclientv3sync

**Issue**
From https://github.com/matrix-org/synapse/issues/12363#issuecomment-1087668602; It's unclear if a client should *always* interpret any room ID - even those with no additional information inside its metadata object - should be interpreted as unambiguously "left", as there is no explicit spec text detailing this.

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked Matrix Client-Server API v1.2 `/sync` section and the referenced Synapse discussion. Determine the intended interpretation of room IDs in `leave` entries whose metadata object has no additional information, then clarify the specification so the client's required behavior is explicit.

Written by the indexing model from the issue text.

Assessment

Domain
api, documentation
Issue type
Documentation
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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