{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Business Answer Contract",
  "type": "object",
  "additionalProperties": true,
  "required": ["schema_version", "contract_id", "domain", "answer_surface", "detectors"],
  "properties": {
    "schema_version": {
      "const": "business_answer_contract_v1"
    },
    "contract_id": {
      "type": "string",
      "minLength": 1
    },
    "domain": {
      "type": "string",
      "minLength": 1
    },
    "title": {
      "type": "string"
    },
    "purpose": {
      "type": "string"
    },
    "answer_surface": {
      "type": "object",
      "additionalProperties": true,
      "required": ["required_fields"],
      "properties": {
        "must_start_with": {
          "type": "string"
        },
        "required_fields": {
          "type": "array",
          "minItems": 1,
          "items": {
            "type": "object",
            "additionalProperties": true,
            "required": ["field", "meaning"],
            "properties": {
              "field": {
                "type": "string",
                "minLength": 1
              },
              "meaning": {
                "type": "string",
                "minLength": 1
              }
            }
          }
        },
        "must_not_contain": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "limited_answer_rule": {
          "type": "string"
        }
      }
    },
    "root_layers": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "detectors": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "minItems": 1
    },
    "acceptance": {
      "type": "object",
      "additionalProperties": true
    }
  }
}