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Stabilize MSC3266, support stable room_summary endpoint #19720

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erikjohnston merged 2 commits into from
Apr 24, 2026
+6 −9
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Stabilize MSC3266, support stable room_summary endpoint #19720

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Stabilize MSC3266, support stable room_summary endpoint
dasha-uwu Apr 23, 2026
3147cbe
Changelog entry
dasha-uwu Apr 23, 2026
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1 change: 1 addition & 0 deletions changelog.d/19720.feature
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@@ -0,0 +1 @@
Stabilize MSC3266, removing the experimental config flag `msc3266_enabled`. Add support for stable room summary endpoints. Contributed by @dasha-uwu.
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@MadLittleMods MadLittleMods Apr 24, 2026 •
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@erikjohnston Please check off #18731 as necessary to what this PR solves (include links to this PR on the points it solves)

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@MadLittleMods MadLittleMods May 12, 2026 •
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Looks like this might have been done today (looking at the edit history on #18731)

(although the PR wasn't linked anywhere in the issue)

2 changes: 0 additions & 2 deletions docker/complement/conf/workers-shared-extra.yaml.j2
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Expand Up @@ -123,8 +123,6 @@ experimental_features:
msc3874_enabled: true
# no UIA for x-signing upload for the first time
msc3967_enabled: true
# Expose a room summary for public rooms
msc3266_enabled: true
# Send to-device messages to application services
msc2409_to_device_messages_enabled: true
# Allow application services to masquerade devices
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3 changes: 0 additions & 3 deletions synapse/config/experimental.py
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Expand Up @@ -386,9 +386,6 @@ def read_config(
# MSC3814 (dehydrated devices with SSSS)
self.msc3814_enabled: bool = experimental.get("msc3814_enabled", False)

# MSC3266 (room summary api)
self.msc3266_enabled: bool = experimental.get("msc3266_enabled", False)

# MSC2409 (this setting only relates to optionally sending to-device messages).
# Presence, typing and read receipt EDUs are already sent to application services that
# have opted in to receive them. If enabled, this adds to-device messages to that list.
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9 changes: 5 additions & 4 deletions synapse/rest/client/room.py
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Expand Up @@ -1718,16 +1718,18 @@ async def on_GET(

class RoomSummaryRestServlet(ResolveRoomIdMixin, RestServlet):
PATTERNS = (
# deprecated endpoint, to be removed
# deprecated unstable endpoint, to be removed
re.compile(
"^/_matrix/client/unstable/im.nheko.summary"
"/rooms/(?P<room_identifier>[^/]*)/summary$"
),
# recommended endpoint
# recommended unstable endpoint
re.compile(
"^/_matrix/client/unstable/im.nheko.summary"
"/summary/(?P<room_identifier>[^/]*)$"
),
# stable endpoint
re.compile("^/_matrix/client/v1/room_summary/(?P<room_identifier>[^/]*)$"),
)
CATEGORY = "Client API requests"

Expand Down Expand Up @@ -1775,8 +1777,7 @@ def register_servlets(hs: "HomeServer", http_server: HttpServer) -> None:
RoomTypingRestServlet(hs).register(http_server)
RoomEventContextServlet(hs).register(http_server)
RoomHierarchyRestServlet(hs).register(http_server)
if hs.config.experimental.msc3266_enabled:
RoomSummaryRestServlet(hs).register(http_server)
RoomSummaryRestServlet(hs).register(http_server)
RoomEventServlet(hs).register(http_server)
JoinedRoomsRestServlet(hs).register(http_server)
RoomAliasListServlet(hs).register(http_server)
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