{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://schemas.datapan.dev/datapan.catalog-diff.v1.schema.json",
  "title": "Datapan Catalog Diff v1",
  "description": "Bounded change report between two normalized Datapan registries.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "generated_at",
    "provider",
    "old",
    "new",
    "limit",
    "truncated",
    "counts",
    "summary",
    "added",
    "removed",
    "changed"
  ],
  "properties": {
    "generated_at": {
      "type": "string",
      "format": "date-time"
    },
    "provider": {
      "type": "string",
      "minLength": 1
    },
    "old": {
      "type": "string",
      "minLength": 1
    },
    "new": {
      "type": "string",
      "minLength": 1
    },
    "limit": {
      "type": "integer",
      "minimum": 0
    },
    "truncated": {
      "type": "boolean"
    },
    "counts": {
      "$ref": "#/$defs/counts"
    },
    "summary": {
      "$ref": "#/$defs/summary"
    },
    "added": {
      "$ref": "#/$defs/spec_summaries"
    },
    "removed": {
      "$ref": "#/$defs/spec_summaries"
    },
    "changed": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/change"
      }
    }
  },
  "$defs": {
    "counts": {
      "type": "object",
      "additionalProperties": false,
      "required": ["old", "new"],
      "properties": {
        "old": {
          "type": "integer",
          "minimum": 0
        },
        "new": {
          "type": "integer",
          "minimum": 0
        }
      }
    },
    "summary": {
      "type": "object",
      "additionalProperties": false,
      "required": ["added", "removed", "changed", "stable"],
      "properties": {
        "added": {
          "type": "integer",
          "minimum": 0
        },
        "removed": {
          "type": "integer",
          "minimum": 0
        },
        "changed": {
          "type": "integer",
          "minimum": 0
        },
        "stable": {
          "type": "integer",
          "minimum": 0
        }
      }
    },
    "spec_summaries": {
      "type": "array",
      "items": {
        "$ref": "#/$defs/spec_summary"
      }
    },
    "spec_summary": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "title", "provider", "operations_count"],
      "properties": {
        "id": {
          "type": "string",
          "minLength": 1
        },
        "title": {
          "type": "string",
          "minLength": 1
        },
        "provider": {
          "type": "string",
          "minLength": 1
        },
        "organization": {
          "type": "string"
        },
        "source_category": {
          "type": "string"
        },
        "priority": {
          "type": "string"
        },
        "operations_count": {
          "type": "integer",
          "minimum": 0
        },
        "source_keywords": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "search_terms": {
          "type": "array",
          "items": {
            "type": "string"
          }
        },
        "description": {
          "type": "string"
        }
      }
    },
    "change": {
      "type": "object",
      "additionalProperties": false,
      "required": ["id", "fields", "old_digest", "new_digest"],
      "properties": {
        "id": {
          "type": "string",
          "minLength": 1
        },
        "old_title": {
          "type": "string"
        },
        "new_title": {
          "type": "string"
        },
        "fields": {
          "type": "array",
          "items": {
            "enum": [
              "title",
              "provider",
              "organization",
              "source_category",
              "priority",
              "source_keywords",
              "search_terms",
              "operations",
              "smoke",
              "source",
              "description"
            ]
          },
          "minItems": 1
        },
        "old_digest": {
          "type": "string",
          "pattern": "^[a-f0-9]{64}$"
        },
        "new_digest": {
          "type": "string",
          "pattern": "^[a-f0-9]{64}$"
        }
      }
    }
  }
}