{
  "dcp_version": "1.0",
  "message_id": "msg_delta01",
  "message_type": "task.status_changed",
  "issued_at": "2026-06-29T10:00:00Z",
  "body": {
    "event_id": "evt_delta01",
    "entity_type": "task",
    "verb": "status_changed",
    "entity_id": "task_x",
    "delta": {
      "status": {
        "from": "todo",
        "to": "in_progress"
      }
    }
  }
}