{
  "id": "msg_01REFUSE",
  "type": "message",
  "role": "assistant",
  "content": [
    {"type": "text", "text": "I can't help with that."}
  ],
  "model": "claude-opus-5",
  "stop_reason": "refusal",
  "stop_sequence": null,
  "usage": {"input_tokens": 9, "output_tokens": 6}
}