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Remove obsolete Synapse experimental feature flags (msc3266, msc4140, msc4429)

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None of these flags exist in current Synapse:

- msc3266_enabled: MSC3266 support was stabilized in Synapse v1.153.0 and the room summary API is now always enabled

- msc4140_enabled: this was never a Synapse configuration setting in any released version. Delayed events have always been controlled by the `max_event_delay_duration` setting, which the playbook was emitting alongside the flag. The toggle is now named `matrix_synapse_delayed_events_enabled`.

- msc4429_enabled: MSC4429 support has not landed in any released Synapse version, so this flag never had any effect

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Slavi Pantaleev
2026-07-22 07:56:17 +03:00
parent 6b0a635454
commit 654aea79b2
4 changed files with 11 additions and 28 deletions
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roles/custom/matrix-synapse/defaults/main.yml
+5 -24
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@@ -537,7 +537,7 @@ matrix_synapse_federation_rr_transactions_per_room_per_second: 50
# Controls the rate limit for delayed event management.
#
# This is only applied if `matrix_synapse_experimental_features_msc4140_enabled` is set to `true`.
# This is only applied if `matrix_synapse_delayed_events_enabled` is set to `true`.
matrix_synapse_rc_delayed_event_mgmt:
per_second: 1
burst_count: 20
@@ -1435,16 +1435,7 @@ matrix_synapse_experimental_features_msc4108_enabled: false
################################################################################
# Controls whether to enable the "room summary API" experimental feature.
# See https://github.com/matrix-org/matrix-spec-proposals/pull/3266
# Despite being experimental, this feature is mandatory for the next-generation Element X clients, which is why it is enabled by default:
# https://github.com/element-hq/element-x-ios/issues/3713#issuecomment-2620958291
# If you're worried about the privacy implications of this unauthenticated API, see:
# https://github.com/deepbluev7/matrix-doc/blob/room-summaries/proposals/3266-room-summary.md#client-server-api
# Set this to false if you still want to disable to API for some reason. Note that doing so breaks Element X compatibility though.
matrix_synapse_experimental_features_msc3266_enabled: true
# Controls whether to enable the "Delayed Events" experimental feature.
# Controls whether to enable the "Delayed Events" feature (MSC4140).
# Delayed events are required for proper call (Element Call) participation signalling.
# If disabled it is very likely that you end up with stuck calls in Matrix rooms.
#
@@ -1453,11 +1444,12 @@ matrix_synapse_experimental_features_msc3266_enabled: true
# - `matrix_synapse_rc_delayed_event_mgmt`
#
# See https://github.com/matrix-org/matrix-spec-proposals/pull/4140
matrix_synapse_experimental_features_msc4140_enabled: false
matrix_synapse_delayed_events_enabled: false
# Controls the maximum allowed duration by which sent events can be delayed, as per MSC4140.
# Synapse enables delayed events based on this configuration setting being present.
#
# See `matrix_synapse_experimental_features_msc4140_enabled`.
# This is only applied if `matrix_synapse_delayed_events_enabled` is set to `true`.
matrix_synapse_max_event_delay_duration: 24h
# Controls whether to enable the MSC4143 experimental feature (RTC transports).
@@ -1492,14 +1484,6 @@ matrix_synapse_experimental_features_msc4306_enabled: false
# See https://github.com/matrix-org/matrix-spec-proposals/pull/4354
matrix_synapse_experimental_features_msc4354_enabled: false
# Controls whether to enable the MSC4429 experimental feature (profile updates for legacy `/sync`).
#
# This allows servers to notify clients using the legacy `/sync` endpoint of profile changes
# for other users, enabling features such as user status.
#
# See https://github.com/matrix-org/matrix-spec-proposals/pull/4429
matrix_synapse_experimental_features_msc4429_enabled: false
# Holds the final `experimental_features` configuration for the Synapse homeserver.
#
# This is constructed from various other variables and is not meant to be redefined directly.
@@ -1515,14 +1499,11 @@ matrix_synapse_experimental_features_default: |
{
'msc2409_to_device_messages_enabled': matrix_synapse_experimental_features_msc2409_to_device_messages_enabled | bool,
'msc3202_transaction_extensions': matrix_synapse_experimental_features_msc3202_transaction_extensions_enabled | bool,
'msc3266_enabled': matrix_synapse_experimental_features_msc3266_enabled | bool,
'msc4108_enabled': matrix_synapse_experimental_features_msc4108_enabled | bool,
'msc4140_enabled': matrix_synapse_experimental_features_msc4140_enabled | bool,
'msc4143_enabled': matrix_synapse_experimental_features_msc4143_enabled | bool,
'msc4222_enabled': matrix_synapse_experimental_features_msc4222_enabled | bool,
'msc4306_enabled': matrix_synapse_experimental_features_msc4306_enabled | bool,
'msc4354_enabled': matrix_synapse_experimental_features_msc4354_enabled | bool,
'msc4429_enabled': matrix_synapse_experimental_features_msc4429_enabled | bool,
}
| dict2items
| selectattr('value')