1 Commits

Author	SHA1	Message	Date
Nan Gao	085924a3d0	fix(channels): run each IM message once across instances, restarts and late redeliveries (#7104) ... * fix(channels): run each IM message once across instances, restarts and late redeliveries Inbound IM messages were deduplicated only by the 10-minute inbound dedupe store (#7103). Discord direct messages had no key at all, a Discord thread reply got an instance-dependent key, a Discord thread was created before dedupe ran, a redelivery past the window started a second run, and two instances racing on a conversation's first messages bound it to two threads. - Discord messages are keyed (discord, guild_id or "dm", posting channel, message_id); the posting channel is the same on every instance. - MessageBus.claim_inbound lets an adapter record the manager's dedupe key before a side effect; Discord claims it on the Gateway loop before _create_thread, marks the published message dedupe_claimed, and gives the claim back when the message is never committed. - runs.wait / runs.stream / runs.create send an Idempotency-Key derived from the dedupe key, and keyed human message ids are uuid5 of it (a uuid4 per attempt made every keyed retry a 409). A reused run's status-only /wait or stream gap is resolved to this message's own turn via threads.get_state; 409s about the message's own keyed run keep the key instead of reading as a busy thread; an ended reused GitHub run gets no follow-up watcher. - A conversation's first thread binding is claimed insert-if-absent (claim_thread_id on channel_conversations and channel_thread_bindings); the loser adopts the winner and deletes the empty thread it minted. /new and /agent use still rebind. Docs: IM_CHANNEL_CONNECTIONS.md, CONFIGURATION.md, channels AGENTS.md, CHANGELOG (en/zh). * fix(channels): give back Discord dedupe claims for messages never processed Review round 1 on #7104. A Discord claim records the manager's dedupe key before the message is queued, so every path that drops the message unrun must release it, or a peer refuses the redelivery for the rest of the TTL: - The hand-off task releases the claim on cancellation too (stop() drains it while it resolves the connection identity), via await_drained so the cancellation still propagates. - ChannelManager._discard_pending_inbound releases the key of a claimed message that shutdown drops from the queue, after the grace period and on a cancelled shutdown. - The adapter tracks claims until they are committed. A release refused because stop() already closed cross-loop intake, or a hand-off cancelled before it ran, leaves the claim tracked, and stop() releases it last. * fix(gateway): keep IM run idempotency stable when /new rebinds the conversation Review round 2 on #7104. The Gateway scoped every Idempotency-Key by owner and thread. /new rebinds an IM conversation to a fresh thread, so a late redelivery of a message admitted on the old thread was requested on the new one, got a different scoped key and started a second run. - Keys from trusted internal callers (the IM channel manager) are scoped by owner only (`internal-run:` prefix); browser and API keys keep the owner-and-thread scope (`http-run:`). - A key that resolves to a run of another thread or user raises RunIdempotencyKeyMismatch, a RuntimeError subclass so in-process launchers see the same type, and start_run answers it with 409 "Idempotency-Key already used with a different request" instead of a 500. The channel manager already treats that 409 as the message's admitted run. Docs: API.md, IM_CHANNEL_CONNECTIONS.md, gateway AGENTS.md (reworded to stay under its budget), CHANGELOG (en/zh). --------- Co-authored-by: Willem Jiang <willem.jiang@gmail.com>	2026-10-19 22:57:19 +08:00