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MSC4403: Forbid event_id on PDUs received over federation #4403

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MSC4403: Forbid event_id on PDUs received over federation #4403

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@velikopter velikopter commented Jan 15, 2026 •
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Signed-off-by: Kierre Sametti [email protected]

@velikopter velikopter changed the title MSC0000: Remove event_id from redacted events MSC4403: Remove event_id from redacted events Jan 15, 2026
@turt2live turt2live added requires-room-version An idea which will require a bump in room version proposal A matrix spec change proposal s2s Server-to-Server API (federation) room-spec Something to do with the room version specifications unassigned-room-version Remove this label when things get versioned. needs-implementation This MSC does not have a qualifying implementation for the SCT to review. The MSC cannot enter FCP. labels Jan 15, 2026
turt2live
turt2live reviewed Jan 15, 2026
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proposals/4403-forbid-event_id.md
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Implementation requirements:

  • Unstable room version
  • Complement tests

turt2live
turt2live requested changes Jan 15, 2026
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I have not read the MSC in detail - this is just an early checklist check.

tulir
tulir reviewed Jan 15, 2026
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@velikopter velikopter changed the title MSC4403: Remove event_id from redacted events MSC4403: Forbid event_id on events Jan 15, 2026
anoadragon453
anoadragon453 reviewed Jan 16, 2026
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zecakeh
zecakeh reviewed Jan 16, 2026
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@velikopter velikopter changed the title MSC4403: Forbid event_id on events MSC4403: Forbid event_id on PDUs received over federation Jan 16, 2026
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needs-implementation This MSC does not have a qualifying implementation for the SCT to review. The MSC cannot enter FCP. proposal A matrix spec change proposal requires-room-version An idea which will require a bump in room version room-spec Something to do with the room version specifications s2s Server-to-Server API (federation) unassigned-room-version Remove this label when things get versioned.

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@velikopter @turt2live @anoadragon453 @Half-Shot @tulir @zecakeh