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fix(acp): preserve routing for edited messages - #4741

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fix(acp): preserve routing for edited messages#4741
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fix/edit-message-agent-mentions

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@loganj loganj commented Aug 4, 2026

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Summary

Message edits are auxiliary events, but replies, reactions, setup nudges, and queued delivery must remain anchored to the original visible message. This foundation slice establishes that routing contract before default activation and native mid-turn steering are introduced.

  • Resolves an edit's original message and thread root before dispatch.
  • Keeps edit-triggered reactions and replies attached to the visible original event, including cancellation and setup-mode paths.
  • Replays queued events chronologically, then isolates edit delivery at its routing boundary so an edit cannot inherit another event's reply target.
  • Falls back to the edit's target ID when the original cannot be fetched within the bounded lookup.

Stack position

1 of 3 — foundation, based on main.

Next: #6131 (default activation), then #6132 (native steer and lifecycle fencing).

Related issue

None found.

Acceptance gates

  • ACP unit and lifecycle tests pass locally: cargo test -p buzz-acp --all-targets (787 unit tests and 9 lifecycle tests)
  • ACP compilation passes locally: cargo check -p buzz-acp
  • Required CI checks pass on foundation head 0a70cb739bc029d972166781389bb944e7695e0f
  • Bottom-up stack review is complete

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loganj force-pushed the fix/edit-message-agent-mentions branch 2 times, most recently from a47e638 to ac89510 Compare August 4, 2026 16:48
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loganj marked this pull request as ready for review August 4, 2026 18:15
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loganj requested a review from a team as a code owner August 4, 2026 18:15

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loganj force-pushed the fix/edit-message-agent-mentions branch 2 times, most recently from 4271fc7 to a0ec518 Compare August 10, 2026 17:31

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loganj force-pushed the fix/edit-message-agent-mentions branch from a0ec518 to c2573e3 Compare August 10, 2026 18:32

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Review submitted by Carl on Wes's behalf. I found an exact-once race in the asynchronous edit preparation path: in-flight deadline recovery can dispatch the reserved edit normally, after which the late preparation can steer the same edit into the replacement turn. Please bind prepared work to the turn/reservation it was created for and discard completion after that reservation has been recovered or consumed.

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@loganj
loganj force-pushed the fix/edit-message-agent-mentions branch from ea2542d to 6b6a033 Compare August 12, 2026 18:38
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loganj commented Aug 12, 2026

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loganj commented Aug 12, 2026

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The requested exact-once reservation fix is present on current head 6b6a033f0956454988bfefed4ec13eca00ad4637, with full-branch validation and independent Royals review complete. @wesbillman could you please re-review or clear the stale requested-changes gate when able?

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loganj force-pushed the fix/edit-message-agent-mentions branch from 22a0ffd to 2334ad7 Compare August 12, 2026 20:09

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Comment thread crates/buzz-acp/src/pool.rs
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Comment thread crates/buzz-acp/src/queue.rs
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loganj force-pushed the fix/edit-message-agent-mentions branch from 23b05e1 to ab8411f Compare August 13, 2026 16:18

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loganj dismissed wesbillman’s stale review August 13, 2026 16:40

The exact-once race identified by this review was fixed, regression-tested, replied to, and its conversation resolved at current head ab8411f.

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Comment thread crates/buzz-acp/src/config.rs Outdated
pub(crate) fn default_mention_kinds() -> Vec<u32> {
vec![
KIND_STREAM_MESSAGE,
KIND_STREAM_MESSAGE_EDIT,

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P2 Badge Route edit-triggered typing to the original thread

When this newly subscribed edit targets a threaded reply and starts a normal turn, dispatch_pending still derives typing_scope by calling parse_thread_tags on the raw kind:40003 event. Its bare e target is intentionally ignored there, so build_typing_event emits an h-only indicator and Desktop records it at channel scope rather than in the original thread. Resolve the edit target for the typing scope, or update the scope after edit enrichment, so users viewing the thread can see that the agent is responding.

Useful? React with 👍 / 👎.

Comment on lines +2837 to +2838
let reaction_event_id =
queue::reaction_target_id(&buzz_event.event);

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P2 Badge Clean up reactions using the resolved edit target

When an accepted edit is still queued or reserved and a membership-removal notification drains the channel, this now adds 👀 to the original message, but EventQueue::drain_channel returns raw edit IDs and omits withheld IDs entirely; the removal handler consequently tries to delete a reaction from the auxiliary edit instead of the visible original. In contexts where deletion remains permitted, the original still keeps a stale 👀 indefinitely. Have the drain path return the same reaction_target_id values used here, including withheld reservations.

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Brother Darryl and others added 7 commits August 17, 2026 10:06
Signed-off-by: Brother Darryl <146fb160a3266e6165bfa385f6048c975eda9e21cf65da097a0b5ea7952532a5@buzz.block.builderlab.xyz>
(cherry picked from commit 914418d)
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
Signed-off-by: Brother Darryl <146fb160a3266e6165bfa385f6048c975eda9e21cf65da097a0b5ea7952532a5@buzz.block.builderlab.xyz>
(cherry picked from commit fa5a74e)
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
(cherry picked from commit acd0a06)
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
(cherry picked from commit 9811b89)
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
(cherry picked from commit ab8411f)
Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
Import the edit kind only for explicit setup routing coverage; default subscriptions remain unchanged in this foundation slice.

Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
Sort replayed events chronologically before draining and dispatch each edit independently so its original-message route cannot be hidden by a later event.

Signed-off-by: Larry <8cf5a83f590ec0955b11647d1c88f796a98e088c30a492c58e0e46c3026ae7a4@buzz.block.builderlab.xyz>
@loganj
loganj force-pushed the fix/edit-message-agent-mentions branch from 5e03c2c to 0a70cb7 Compare August 17, 2026 15:03
@loganj loganj changed the title fix(acp): wake agents for mentions added by edits fix(acp): preserve routing for edited messages Aug 17, 2026
@loganj
loganj marked this pull request as draft August 17, 2026 15:04
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