Add experimental and incomplete support for MSC4306: Thread Subscriptions.#18674
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reivilibre merged 13 commits intodevelopfrom Jul 21, 2025
Merged
Add experimental and incomplete support for MSC4306: Thread Subscriptions.#18674reivilibre merged 13 commits intodevelopfrom
reivilibre merged 13 commits intodevelopfrom
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| CONSTRAINT thread_subscriptions_fk_rooms | ||
| FOREIGN KEY (room_id) | ||
| REFERENCES rooms(room_id), |
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We'll need to delete from this during purge room
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do you think a ON DELETE CASCADE is fair here or do we need to be a bit more paginated about the deletion?
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oh, to be fair .... we will already delete subscriptions when the event is deleted, so when deleting the actual room there shouldn't be anything left to delete. In that case I think ON DELETE CASCADE is fair as a last-resort. I'll add that + a comment saying as much
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erikjohnston
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Tested on NetBSD 9 amd64 (federation, multiple clients) # Synapse 1.135.0 (2025-08-01) ## Features - Add `recaptcha_private_key_path` and `recaptcha_public_key_path` config option. ([\#17984](element-hq/synapse#17984), [\#18684](element-hq/synapse#18684)) - Add plain-text handling for rich-text topics as per [MSC3765](matrix-org/matrix-spec-proposals#3765). ([\#18195](element-hq/synapse#18195)) - If enabled by the user, server admins will see [soft failed](https://spec.matrix.org/v1.13/server-server-api/#soft-failure) events over the Client-Server API. ([\#18238](element-hq/synapse#18238)) - Add experimental support for [MSC4277: Harmonizing the reporting endpoints](matrix-org/matrix-spec-proposals#4277). ([\#18263](element-hq/synapse#18263)) - Add ability to limit amount of media uploaded by a user in a given time period. ([\#18527](element-hq/synapse#18527)) - Enable workers to write directly to the device lists stream and handle device list updates, reducing load on the main process. ([\#18581](element-hq/synapse#18581)) - Support arbitrary profile fields. Contributed by @clokep. ([\#18635](element-hq/synapse#18635)) - Advertise support for Matrix v1.12. ([\#18647](element-hq/synapse#18647)) - Add an option to issue redactions as an admin user via the [admin redaction endpoint](https://element-hq.github.io/synapse/latest/admin_api/user_admin_api.html#redact-all-the-events-of-a-user). ([\#18671](element-hq/synapse#18671)) - Add experimental and incomplete support for [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-spec-proposals/blob/rei/msc_thread_subscriptions/proposals/4306-thread-subscriptions.md). ([\#18674](element-hq/synapse#18674)) - Include `event_id` when getting state with `?format=event`. Contributed by @tulir @ Beeper. ([\#18675](element-hq/synapse#18675))
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…to Sliding Sync when MSC4306 and MSC4186 are enabled. (#18695) Closes: #18436 Implements: matrix-org/matrix-spec-proposals#4308 Follows: #18674 Adds an extension to Sliding Sync and a companion endpoint needed for backpaginating missed thread subscription changes, as described in MSC4308 --------- Signed-off-by: Olivier 'reivilibre <oliverw@matrix.org> Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
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Implements: MSC4306 (partially)
Commit-by-commit review suggested.
What's missing:
Add
thread_subscriptionstableAdd stream backed by
thread_subscriptionstableAdd thread subscriptions handler
Add thread subscriptions endpoints
aside: note that EventID only applies to room versions 1 and 2
Add tests for thread subscription endpoints
docker workers: register thread_subscriptions worker as worker type