{
  "fixture_id": "F-5",
  "scenario": "cron 등록 실패 → fallback_chain: failure_envelope + handoff fallback 박제",
  "input": {
    "task_id": "task-2712-f5",
    "terminal_state": "INFRA_DEFECT",
    "exit_code": 1,
    "failure_kind": "cron_fallback",
    "phase": "cron_registration",
    "marker_type": "failure_envelope",
    "cron_fn_raises": true
  },
  "expected": {
    "marker_type": "failure_envelope",
    "marker_suffix": ".failure-envelope.json",
    "fallback_handoff_written": true,
    "fallback_marker_suffix": ".failure-handoff-marker.json",
    "done_allowed": false,
    "terminal_state": "INFRA_DEFECT",
    "verify_exactly_one_status": "OK",
    "byte_limit_ok": true,
    "collector_role": "ANU",
    "self_key_used": false
  }
}