Three correctness fixes the v0.15 subagent aggregator spine depends on:
1. child_done emission on ALL terminal transitions, not just success.
- completeJob already emitted on success — now also tags outcome='complete'.
- failJob newly emits on terminal 'failed' or 'dead' (outcome='failed'|'dead',
error=<text>), BEFORE the parent-terminal UPDATE so the EXISTS guard on
the inbox INSERT doesn't skip it on fail_parent paths (codex catch).
- cancelJob now emits outcome='cancelled' per descendant with a parent.
- handleTimeouts now emits outcome='timeout' per timed-out child.
ChildDoneMessage gains optional { outcome, error } — backwards compatible
(legacy writers omitted them; consumers treat absent outcome as 'complete').
2. Parent-resolution terminal set now includes 'failed'.
Pre-v0.15 the `NOT EXISTS (... status NOT IN ('completed','dead','cancelled'))`
guard treated a failed child as still-pending, stranding aggregator parents
that chose on_child_fail='continue' or 'ignore' in waiting-children forever.
Expanded to {completed, failed, dead, cancelled} everywhere parent resolution
reads child status (completeJob inline, failJob remove_dep + continue,
cancelJob sweep, handleTimeouts sweep, and the resolveParent method itself).
3. MinionJobInput.max_stalled threads through MinionQueue.add() on INSERT.
Column exists with default 1 — that is "first stall → dead", which defeats
crash recovery for long-running handlers. Subagent children will set
max_stalled: 3 to survive mid-run worker kills. Second-submitter under an
idempotency-key hit does NOT mutate the existing row (codex-flagged
footgun — first-submit options are load-bearing state).
13 unit tests pin: emission on each of completeJob/failJob/cancelJob/
handleTimeouts, insertion order on fail_parent, terminal-set expansion with
continue policy, max_stalled default + override + idempotency behavior.
E2E tier 1 (Postgres) passes 141 tests unchanged.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
