附录：Subagents 为什么是 4 次模型调用——抓包实录

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{
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  "model": "deepseek-v4-flash-vision-exp",
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  "input": [
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    {"type": "message", "role": "system",
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     "content": "你是个人助理主管。遇到日程类请求时，调用 schedule_event 交给日历助手，拿到结果后用一句自然语言回复用户。"},
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    {"type": "message", "role": "user",
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     "content": "帮我约明天下午 3 点和张三开产品评审会，1 小时"}
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  ],
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  "tools": [
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    {"type": "function", "name": "schedule_event",
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     "description": "把用户的日程安排请求交给日历助手处理。入参 request 应是完整的一句话请求。",
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     "parameters": {"type": "object", "properties": {"request": {"type": "string"}}, "required": ["request"]}}
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  ],
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  "max_output_tokens": 2048
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}

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{
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  "id": "713dda7a-2723-4f52-b22a-26483d8ee7e9",
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  "model": "deepseek-flash",
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  "status": "completed",
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  "output": [
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    {"type": "reasoning", "status": "completed",
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     "content": [{"type": "reasoning_text",
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                  "text": "The user wants to schedule a meeting. I should call schedule_event with the complete request."}],
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     "encrypted_content": "713dda7a-2723-4f52-b22a-26483d8ee7e9-0"},
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    {"type": "function_call", "status": "completed",
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     "name": "schedule_event",
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     "arguments": "{\"request\": \"帮我约明天下午 3 点和张三开产品评审会，时长 1 小时\"}",
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     "call_id": "call_00_Fsa6XTMl6dbQxpR4TFIb4432"}
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  ],
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  "usage": {"input_tokens": 347, "output_tokens": 75,
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            "output_tokens_details": {"reasoning_tokens": 18}, "total_tokens": 422}
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}

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"input": [
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  {"type": "message", "role": "system", "content": "你是日历助手。收到日程请求后，必须调用 create_calendar_event 创建事件，然后用一句话确认结果（包含标题与时间）。"},
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  {"type": "message", "role": "user",   "content": "帮我约明天下午 3 点和张三开产品评审会，时长 1 小时"}
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]

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"input": [
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  {"type": "message", "role": "system", "content": "你是日历助手。…"},
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  {"type": "message", "role": "user",   "content": "帮我约明天下午 3 点和张三开产品评审会，时长 1 小时"},
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  {"type": "function_call", "name": "create_calendar_event",
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   "arguments": "{\"title\": \"产品评审会\", \"start_iso\": \"2025-06-11T15:00:00\", \"duration_minutes\": 60}",
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   "call_id": "call_00_…"},
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  {"type": "function_call_output", "call_id": "call_00_…",
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   "output": "OK: created '产品评审会' at 2025-06-11T15:00:00 for 60 min"}
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]

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"input": [
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  {"type": "message", "role": "system", "content": "你是个人助理主管。…"},
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  {"type": "message", "role": "user",   "content": "帮我约明天下午 3 点和张三开产品评审会，1 小时"},
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  {"type": "reasoning", "content": [{"type": "reasoning_text", "text": "The user wants to schedule a meeting. I should call schedule_event…"}],
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   "encrypted_content": "713dda7a-…-0"},
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  {"type": "function_call", "name": "schedule_event",
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   "arguments": "{\"request\": \"帮我约明天下午 3 点和张三开产品评审会，时长 1 小时\"}",
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   "call_id": "call_00_Fsa6XTMl6dbQxpR4TFIb4432"},
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  {"type": "function_call_output", "call_id": "call_00_Fsa6XTMl6dbQxpR4TFIb4432",
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   "output": "已为你创建「产品评审会」，时间：明天（2025-06-11）15:00，时长 1 小时。"}
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]

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{
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  "model": "deepseek-flash",
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  "status": "completed",
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  "output": [
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    {"type": "message", "role": "assistant", "status": "completed", "phase": "final_answer",
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     "content": [{"type": "output_text",
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                  "text": "已经帮你安排好了：明天（2025-06-11）下午 3 点和张三的产品评审会，时长 1 小时。"}]}
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  ],
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  "usage": {"input_tokens": 462, "output_tokens": 31,
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            "input_tokens_details": {"cached_tokens": 256}, "total_tokens": 493}
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}