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Clarify room version requirements on MSC3381 #4355

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Clarify room version requirements on MSC3381 #4355

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20 changes: 5 additions & 15 deletions proposals/3381-polls.md
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Expand Up @@ -373,9 +373,11 @@ If a client/user wishes to make a poll statically visible, they should check out

Notifications support for polls have been moved to [MSC3930](https://github.com/matrix-org/matrix-spec-proposals/pull/3930).

Normally extensible events would only be permitted in a specific room version, however as a known-lossy chat
feature, this proposal's events are permitted in any room version. The stable event types should only be sent
in a room version which supports extensible events, however.
Normally extensible events would only be permitted in a specific room version. However, unlike other proposals
related to extensible events, this proposal's events don't replace any existing events in the spec. Additionally,
the only extensible events component this proposal depends on is `m.text` which has already entered the spec via
[MSC3765](https://github.com/matrix-org/matrix-spec-proposals/pull/3765) in version 1.15. Therefore, this proposal's
events are permitted in any room version.

## Unstable prefix

Expand Down Expand Up @@ -453,15 +455,3 @@ Examples of unstable events are:
}
}
```

### Implementation considerations

Client authors should note that as a feature using the Extensible Events system,
usage of the *stable* event types in regular room versions is not permitted. As
of writing (December 2023), Extensible Events does not have a *stable* room version
which supports such events, therefore meaning that clients will have to use the
*unstable* event types if they intend to support polls in existing room versions.

When Extensible Events as a system is released in a dedicated room version, clients
will be able to use the stable event types there. The unstable event types should
not be used in that dedicated room version.