{
  "last_heartbeat": "2026-05-29T09:51:00+08:00",
  "active_tasks": 0,
  "active_task_ids": [],
  "p0_risks": [],
  "p1_p2_warnings": [],
  "action_taken": "silent",
  "note": "所有任务已 done/cancelled，无活跃任务"
}