End-to-end #86632 reproduction: a real AIAgent child (mocked LLM) with the
post-turn skill-review trigger armed, dispatched through
delegate_task(background=True) on a session runtime where async delivery is
unsupported and no origin session id is bound (cron, post-#66617) — forcing
the synchronous fallback. Asserts (1) delegate_task returns the child's
result, and (2) the automatic background-review fork never spawns inside the
delegated child (the wedge site: the fork replayed the conversation on the
child's finalize path, and _child_future.result(timeout=None) never returned;
heartbeat went stale after 15 idle cycles and the cron watchdog killed the
job).
Verified RED on pre-fix main (fork spawns and wedges), GREEN with the
_delegate_depth guard in AIAgent._spawn_background_review.
Fixes#86632
e729055a56