{
  "items": [
    "system(画像)",
    "history(12)",
    "attachments(1)",
    "knowledge(3)"
  ],
  "truncations": [
    "历史 47 条超窗口 40，仅保留最近部分",
    "工具结果超长，转工件引用"
  ],
  "estChars": 18234
}