A completed child parked forever behind a parent that never serviced its
command channel, or behind its own frozen chat-state actor, leaking the
child session thread, fs watchers and fds. Every await in the completion
path that rides another actor is now bounded: child chat-state reads
degrade to their fallbacks after 10 s, the usage-fold and not-applied acks
give up after 30 s (an unacked mark falls back to the coordinator's sticky
mark), list_tasks and reparent_notifications are bounded, and the
post-Shutdown worktree snapshot is bounded while removal is awaited in
full so no detached deletion can race a resume.
Ported from upstream 1.0.14 (grok-build subagent/handle_request.rs
PARENT_ACK_TIMEOUT / child_actor_query), reshaped without the drain-budget
const assert.
Claude-Session: https://claude.ai/code/session_01RUqV8HVGXcAETyYbZ2tPQ4
雷电芽衣
91f14112bf