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3f4d46d7b4
Previously, run_turn_loop was bounded only by max_turns (turn count). If engine.submit_message stalled — slow provider, hung network, infinite stream — the loop blocked indefinitely with no cancellation path. Claws calling run_turn_loop in CI or orchestration had no reliable way to enforce a deadline; the loop would hang until OS kill or human intervention. Fix: - Add timeout_seconds parameter to run_turn_loop (default None = legacy unbounded). - When set, each submit_message call runs inside a ThreadPoolExecutor and is bounded by the remaining wall-clock budget (total across all turns, not per-turn). - On timeout, synthesize a TurnResult with stop_reason='timeout' carrying the turn's prompt and routed matches so transcripts preserve orchestration context. - Exhausted/negative budget short-circuits before calling submit_message. - Legacy path (timeout_seconds=None) bypasses the executor entirely — zero overhead for callers that don't opt in. CLI: - Added --timeout-seconds flag to 'turn-loop' command. - Exit code 2 when the loop terminated on timeout (vs 0 for completed), so shell scripts can distinguish 'done' from 'budget exhausted'. Tests (tests/test_run_turn_loop_timeout.py, 6 tests): - Legacy unbounded path unchanged (timeout_seconds=None never emits 'timeout') - Hung submit_message aborted within budget (0.3s budget, 5s mock hang → exit <1.5s) - Budget is cumulative across turns (0.6s budget, 0.4s per turn, not per-turn) - timeout_seconds=0 short-circuits first turn without calling submit_message - Negative timeout treated as exhausted (guard against caller bugs) - Timeout TurnResult carries correct prompt, matches, UsageSummary shape Full suite: 49/49 passing, zero regression. Blocker: none. Closes ROADMAP #161.