Token 用量归一化：缓存、推理与协议字段

{
  "input_tokens": 100,
  "input_tokens_details": {
    "cached_tokens": 40,
    "cache_write_tokens": 10
  },
  "output_tokens": 80,
  "output_tokens_details": {
    "reasoning_tokens": 20
  },
  "total_tokens": 180
}

{
  "input_tokens": 60,
  "cache_read_input_tokens": 40,
  "cache_creation_input_tokens": 10,
  "output_tokens": 80
}

[S11] 2026年5月6日，周楠递交了橙湾阅读角方案。本轮预算为0元，不申请新增经费。
[S12] 会议已批准该方案；上线日期尚未确定。

{
  "fictional_billing": true,
  "cny_total": "0.1700",
  "estimates_cny": {
    "a": "0.05600"
  },
  "explanation": {
    "summary": "This ledger contains two entries with financial amounts in different currencies. The 'actual' value represents the confirmed transaction amount, while the 'estimated' value is a preliminary or projected amount that may be subject to change. The 'fx_date' field indicates the date of the foreign exchange rate applied and should be retained for accurate historical reference.",
    "details": [
      {
        "id": "a",
        "currency": "USD",
        "actual": "0.01",
        "estimated": "0.008",
        "fx_cny": "7.00",
        "fx_date": "2026-10-23",
        "notes": "Actual amount is the confirmed USD value; estimated is a preliminary figure. The fx_date is important for exchange rate context."
      },
      {
        "id": "b",
        "currency": "CNY",
        "actual": "0.10",
        "estimated": null,
        "notes": "Only actual amount is provided; no estimate available."
      }
    ],
    "disclaimer": "This data is fictional and for demonstration purposes only; it does not represent any real account or transaction."
  }
}