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Pull requests: matrix-org/matrix-spec-proposals
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MSC4460: Extensible Events - Alternative unstable support
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
#4460
opened May 1, 2026 by
turt2live
Member
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MSC4459: Image pack references
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
#4459
opened Apr 30, 2026 by
tulir
Member
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MSC4458: Handling incoming JSON in the server-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)
#4458
opened Apr 28, 2026 by
richvdh
Member
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MSC4457: Generic reporting API
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
reporting-v2
safety
#4457
opened Apr 28, 2026 by
turt2live
Member
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MSC4456: Harms taxonomy
kind:core
MSC which is critical to the protocol's success
meta
Something that is not a spec change/request and is not related to the build tools
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
reporting-v2
safety
#4456
opened Apr 28, 2026 by
turt2live
Member
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MSC4455: Catch-all property for 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
#4455
opened Apr 25, 2026 by
SpiritCroc
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MSC4454: Deprecating Spoiler Fallback In Media Repository
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
#4454
opened Apr 22, 2026 by
dozro
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MSC4453: Deprecate old room versions
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
room-spec
Something to do with the room version specifications
s2s
Server-to-Server API (federation)
#4453
opened Apr 21, 2026 by
timedoutuk
Contributor
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MSC4452: Preview URL capabilities API
client-server
Client-Server API
disposition-merge
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
proposed-final-comment-period
Currently awaiting signoff of a majority of team members in order to enter the final comment period.
#4452
opened Apr 21, 2026 by
Half-Shot
Contributor
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MSC4451: Deprecate notifications endpoint
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
push
#4451
opened Apr 16, 2026 by
JadedBlueEyes
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MSC4450: Identity Provider selection for User-Interactive Authentication with Legacy Single Sign-On
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
#4450
opened Apr 14, 2026 by
reivilibre
Contributor
•
Draft
MSC4449: Updated /members filtering
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
#4449
opened Apr 11, 2026 by
timedoutuk
Contributor
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Add MSC4448: Preview URL Site Logos
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
#4448
opened Apr 9, 2026 by
Half-Shot
Contributor
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MSC4447: Move OpenID userinfo endpoint out of 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)
/_matrix/federation
kind:maintenance
#4447
opened Apr 6, 2026 by
gingershaped
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MSC4446: Allow moving the fully read marker to older events
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
#4446
opened Apr 2, 2026 by
SpiritCroc
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MSC4445: Clarify 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
/sync timeline order
client-server
#4445
opened Apr 1, 2026 by
MadLittleMods
Contributor
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MSC4441: Encrypted User Profile Annotations via Account Data
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
#4441
opened Mar 30, 2026 by
thetayloredman
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MSC4440: Profile Biography via Global 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
#4440
opened Mar 27, 2026 by
RoootTheFox
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MSC4439: Encryption key URIs in 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
/.well-known/matrix/support
client-server
#4439
opened Mar 26, 2026 by
thetayloredman
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MSC4438: Message bookmarks via account data
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
#4438
opened Mar 24, 2026 by
smokku
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MSC4437: Endpoint to replace entire profile
00-weekly-pings
Tracking for weekly pings in the SCT office. 00 to make it first in the labels list.
client-server
Client-Server API
disposition-merge
kind:maintenance
MSC which clarifies/updates existing spec
proposal
A matrix spec change proposal
proposed-final-comment-period
Currently awaiting signoff of a majority of team members in order to enter the final comment period.
#4437
opened Mar 23, 2026 by
tulir
Member
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MSC4436: Make server ACLs case insensitive
00-weekly-pings
Tracking for weekly pings in the SCT office. 00 to make it first in the labels list.
disposition-merge
kind:maintenance
MSC which clarifies/updates existing spec
proposal
A matrix spec change proposal
proposed-final-comment-period
Currently awaiting signoff of a majority of team members in order to enter the final comment period.
s2s
Server-to-Server API (federation)
#4436
opened Mar 17, 2026 by
turt2live
Member
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MSC4435: Room slowmode
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
#4435
opened Mar 17, 2026 by
velikopter
Contributor
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MSC4433: Image Packs and Room Upgrades
client-server
Client-Server API
kind:feature
MSC for not-core and not-maintenance stuff
proposal
A matrix spec change proposal
#4433
opened Mar 12, 2026 by
anoadragon453
Member
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MSC4432: Server-wide room name overrides
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
#4432
opened Mar 9, 2026 by
Johennes
Contributor
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Updated in the last three days: updated:>2026-05-01.