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Pull requests: matrix-org/matrix-spec-proposals
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MSC4413: remove A matrix spec change proposal
private join_rule
proposal
#4413
opened Feb 2, 2026 by
ara4n
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MSC4412: Widget Base postMessage API
client-server
Client-Server API
kind:feature
MSC for not-core and not-maintenance stuff
proposal
A matrix spec change proposal
widgets
anything to do with widgets
#4412
opened Feb 2, 2026 by
dbkr
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MSC4411: Widget State Event
client-server
Client-Server API
kind:feature
MSC for not-core and not-maintenance stuff
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
widgets
anything to do with widgets
MSC4409: Clarify thumbnailing behavior in E2EE
client-server
Client-Server API
e2e
kind:maintenance
MSC which clarifies/updates existing spec
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
#4409
opened Jan 23, 2026 by
stefanceriu
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MSC4407: Sticky Events (widget-api)
kind:maintenance
MSC which clarifies/updates existing spec
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
widgets
anything to do with widgets
#4407
opened Jan 21, 2026 by
toger5
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MSC4406: Client-Server API
kind:maintenance
MSC which clarifies/updates existing spec
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
M_SENDER_IGNORED error code
client-server
#4406
opened Jan 21, 2026 by
nexy7574
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MSC4405: Deprecate the emoji method for SAS verification
client-server
Client-Server API
e2e
kind:maintenance
MSC which clarifies/updates existing spec
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
#4405
opened Jan 20, 2026 by
uhoreg
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MSC4403: Forbid 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.
event_id on PDUs received over federation
needs-implementation
#4403
opened Jan 15, 2026 by
velikopter
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MSC4402: Consistent redirects for .well-known-files
client-server
Client-Server API
kind:maintenance
MSC which clarifies/updates existing spec
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
s2s
Server-to-Server API (federation)
#4402
opened Jan 15, 2026 by
derhagen
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MSC4401: Publishing client capabilities via profiles
client-server
Client-Server API
kind:feature
MSC for not-core and not-maintenance stuff
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
#4401
opened Jan 15, 2026 by
Johennes
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MSC4400: Remove the depth field from PDUs
kind:maintenance
MSC which clarifies/updates existing spec
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.
#4400
opened Jan 14, 2026 by
velikopter
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MSC4397: Tags as spaces
client-server
Client-Server API
kind:maintenance
MSC which clarifies/updates existing spec
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
#4397
opened Jan 7, 2026 by
ara4n
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[WIP] MSC4396: Inline linked media
client-server
Client-Server API
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
s2s
Server-to-Server API (federation)
safety
MSC4392: Encrypted reactions and replies
e2e
kind:maintenance
MSC which clarifies/updates existing spec
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
#4392
opened Dec 26, 2025 by
tulir
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MSC4391: Simplified in-room bot commands
client-server
Client-Server API
implementation-needs-checking
The MSC has an implementation, but the SCT has not yet checked it.
kind:feature
MSC for not-core and not-maintenance stuff
proposal
A matrix spec change proposal
#4391
opened Dec 24, 2025 by
Gnuxie
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MSC4390: Room Blocking API
client-server
Client-Server API
kind:feature
MSC for not-core and not-maintenance stuff
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
safety
#4390
opened Dec 17, 2025 by
nexy7574
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MSC4389: Image ordering within packs
client-server
Client-Server API
kind:maintenance
MSC which clarifies/updates existing spec
proposal
A matrix spec change proposal
#4389
opened Dec 13, 2025 by
tulir
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MSC4388: Secure out-of-band channel for sign in with QR
client-server
Client-Server API
kind:core
MSC which is critical to the protocol's success
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
MSC4387: Client-Server API
kind:core
MSC which is critical to the protocol's success
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
s2s
Server-to-Server API (federation)
safety
M_SAFETY error code
client-server
#4387
opened Dec 9, 2025 by
turt2live
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MSC4386: Automatically sharing secrets after device verification
client-server
Client-Server API
e2e
kind:feature
MSC for not-core and not-maintenance stuff
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
proposal-in-review
#4386
opened Dec 8, 2025 by
uhoreg
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MSC4385: Pushing secrets to other devices
client-server
Client-Server API
e2e
kind:feature
MSC for not-core and not-maintenance stuff
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
proposal-in-review
#4385
opened Dec 3, 2025 by
uhoreg
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MSC4384: Supporting alternative room directory sorting
client-server
Client-Server API
kind:maintenance
MSC which clarifies/updates existing spec
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
safety
#4384
opened Nov 26, 2025 by
turt2live
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MSC4383: Client-Server Discovery of Server Version
client-server
Client-Server API
kind:maintenance
MSC which clarifies/updates existing spec
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
#4383
opened Nov 21, 2025 by
jevolk
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MSC4382: Peppered hash verification for E2EE content moderation
client-server
Client-Server API
e2e
kind:feature
MSC for not-core and not-maintenance stuff
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
safety
#4382
opened Nov 20, 2025 by
seuros
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