{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://petstore.internal/schemas/booking-intent-v1.schema.json",
  "title": "BookingIntentV1",
  "description": "智能预约 M0 模型输出。所有字段仅是非权威意图提示，业务 ID、服务事实和号源事实由 Petstore 后端重新解析。",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schemaVersion",
    "intent",
    "petQuery",
    "serviceQuery",
    "dateExpression",
    "timeWindow",
    "remark",
    "clearFields",
    "ambiguities",
    "nextAction"
  ],
  "properties": {
    "schemaVersion": {
      "const": "booking-intent-v1"
    },
    "intent": {
      "type": "string",
      "enum": [
        "book",
        "modify",
        "end",
        "fallback"
      ]
    },
    "petQuery": {
      "type": [
        "string",
        "null"
      ],
      "minLength": 1,
      "maxLength": 64
    },
    "serviceQuery": {
      "type": [
        "string",
        "null"
      ],
      "minLength": 1,
      "maxLength": 64
    },
    "dateExpression": {
      "type": [
        "string",
        "null"
      ],
      "minLength": 1,
      "maxLength": 32
    },
    "timeWindow": {
      "oneOf": [
        {
          "type": "null"
        },
        {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "start",
            "end"
          ],
          "properties": {
            "start": {
              "type": [
                "string",
                "null"
              ],
              "pattern": "^(?:[01]\\d|2[0-3]):[0-5]\\d$"
            },
            "end": {
              "type": [
                "string",
                "null"
              ],
              "pattern": "^(?:[01]\\d|2[0-3]):[0-5]\\d$"
            }
          }
        }
      ]
    },
    "remark": {
      "type": [
        "string",
        "null"
      ],
      "minLength": 1,
      "maxLength": 200
    },
    "clearFields": {
      "type": "array",
      "uniqueItems": true,
      "maxItems": 5,
      "items": {
        "type": "string",
        "enum": [
          "petQuery",
          "serviceQuery",
          "dateExpression",
          "timeWindow",
          "remark"
        ]
      }
    },
    "ambiguities": {
      "type": "array",
      "uniqueItems": true,
      "maxItems": 5,
      "items": {
        "type": "string",
        "enum": [
          "pet",
          "service",
          "date",
          "time",
          "remark"
        ]
      }
    },
    "nextAction": {
      "type": "string",
      "enum": [
        "ask",
        "resolve_context",
        "search_slots",
        "show_draft",
        "fallback",
        "end"
      ]
    }
  }
}