{
  "id": "msg_abc123def456",
  "conversationId": "cnv_abc123def456",
  "runId": "run_abc123def456",
  "role": "assistant",
  "parts": [
    {
      "type": "thinking",
      "text": "考虑先检索…",
      "process": true,
      "durationMs": 1500
    },
    {
      "type": "tool_call",
      "toolCall": {
        "id": "call_1",
        "name": "history_search",
        "arguments": "{\"q\":\"部署\"}",
        "durationMs": 12.5
      },
      "process": true
    },
    {
      "type": "tool_result",
      "toolResult": {
        "callId": "call_1",
        "status": "ok",
        "summary": "3 条命中"
      },
      "process": true
    },
    {
      "type": "text",
      "text": "根据历史记录……"
    },
    {
      "type": "artifact_ref",
      "artifact": {
        "artifactId": "art_abc123def456",
        "name": "报告.md",
        "kind": "document"
      }
    },
    {
      "type": "card",
      "card": {
        "kind": "result",
        "data": [
          {
            "type": "markdown",
            "markdown": "全文见卡片"
          }
        ],
        "cardId": "card_abc123def456"
      }
    }
  ],
  "createdAt": "0001-01-01T00:00:00Z"
}