Subagents doing legitimate heavy work (deep code reviews, research
fan-outs, slow reasoning models) were routinely killed at the blanket
600s child_timeout_seconds cap while making steady progress (e.g. 36
API calls completed when the axe fell). Failures should come from what
the child is actually doing — API errors, tool errors, iteration
budget — not a delegation-level stopwatch.
- DEFAULT_CHILD_TIMEOUT: 600 -> None; Future.result(timeout=None)
blocks until the child finishes
- config default delegation.child_timeout_seconds: 600 -> 0
(0/negative = disabled; positive opts back in, floor 30s unchanged)
- stuck-child protection unchanged: the heartbeat staleness monitor
still stops refreshing parent activity so the gateway inactivity
timeout fires on a truly wedged worker; the 0-API-call diagnostic
dump still works when a cap is configured
- docs updated (EN + zh-Hans)
bba9b519aa