{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Grid-DB Chatroom Message",
  "description": "人格体聊天室消息格式（JSONL行格式）",
  "type": "object",
  "required": ["id", "channel", "from", "from_name", "timestamp", "type", "content"],
  "properties": {
    "id": {
      "type": "string",
      "pattern": "^MSG-[0-9]{8}-[0-9]{4}$",
      "description": "消息编号"
    },
    "channel": {
      "type": "string",
      "description": "频道名称"
    },
    "from": {
      "type": "string",
      "description": "发送者人格体编号"
    },
    "from_name": {
      "type": "string",
      "description": "发送者人格体名称"
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "发送时间"
    },
    "type": {
      "type": "string",
      "enum": ["text", "system", "thinking-ref"],
      "description": "消息类型"
    },
    "content": {
      "type": "string",
      "description": "消息内容"
    },
    "mentions": {
      "type": "array",
      "items": { "type": "string" },
      "description": "提及的人格体编号列表"
    },
    "reactions": {
      "type": "array",
      "items": { "type": "string" },
      "description": "消息回应"
    }
  }
}