{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/FieldMetadata",
  "title": "FieldMetadata",
  "type": "object",
  "properties": {
    "fieldName": {
      "type": "string",
      "description": "Field API name"
    },
    "label": {
      "type": "string",
      "description": "Field display label"
    },
    "description": {
      "type": "string",
      "description": "Field description"
    },
    "dataType": {
      "type": "string",
      "enum": [
        "STRING",
        "NUMBER",
        "BOOLEAN",
        "DATE",
        "DATETIME",
        "CURRENCY",
        "PERCENTAGE",
        "EMAIL",
        "URL",
        "PHONE",
        "PICKLIST",
        "MULTI_PICKLIST",
        "LOOKUP",
        "RICH_TEXT"
      ],
      "description": "Field data type"
    },
    "isRequired": {
      "type": "boolean",
      "description": "Whether the field is required"
    },
    "isReadOnly": {
      "type": "boolean",
      "description": "Whether the field is read-only"
    },
    "isCustom": {
      "type": "boolean",
      "description": "Whether this is a custom field"
    },
    "maxLength": {
      "type": "integer",
      "description": "Maximum length for string fields"
    },
    "picklistValues": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "value": {
            "type": "string"
          },
          "label": {
            "type": "string"
          }
        }
      },
      "description": "Picklist options for picklist fields"
    },
    "lookupObjectName": {
      "type": "string",
      "description": "Referenced object name for lookup fields"
    }
  }
}