The cross-chat guard added in the prior commit (resolveBlueBubblesMessageId
with chatContext) only ran on numeric short ids — `if (/^\d+$/.test(trimmed))`.
Full GUID input fell through to `return trimmed` with no chat check.
Once the short-id guard started rejecting cross-chat reuses, agents would
retry the same call with the full GUID copied from history or a previous
tool result. That second attempt bypassed the guard entirely and the
group reaction landed in the DM anyway — exactly the symptom the prior
commit was meant to close.
Apply the same `isCrossChatMismatch` check to full GUID input. Cache miss
still falls through (callers may legitimately supply a fresh-from-the-wire
GUID the cache hasn't observed yet), but cache hits with a chat mismatch
throw with a remediation hint pointed at the chat target rather than at
the id format — telling an agent to "retry with the full GUID" makes no
sense when it already supplied one.
Tests (extensions/bluebubbles/src/monitor-reply-cache.test.ts):
- UUID + same chat → resolves
- UUID + different chat → throws (this is the regression)
- UUID + cache miss → passes through (preserves behavior for fresh GUIDs)
- UUID + empty chatContext → passes through (preserves prior behavior)
- UUID error message hints at the chat target, not the id format
- chatIdentifier fallback applies to UUID input too
Local patch for upstream consideration — completes the cross-chat guard
started in the prior commit so both id forms are protected symmetrically.
6ade320421