{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "MXCP Drift Report",
  "type": "object",
  "required": ["version", "generated_at", "baseline_snapshot_path", "current_snapshot_generated_at", "baseline_snapshot_generated_at", "has_drift", "summary", "table_changes", "resource_changes"],
  "properties": {
    "version": {
      "type": "integer",
      "description": "Version of the drift report format. Must be 1.",
      "enum": [1],
      "default": 1
    },
    "generated_at": {
      "type": "string",
      "format": "date-time",
      "description": "ISO 8601 timestamp when the report was generated"
    },
    "baseline_snapshot_path": {
      "type": "string",
      "description": "Path to the baseline snapshot file"
    },
    "current_snapshot_generated_at": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when the current snapshot was generated"
    },
    "baseline_snapshot_generated_at": {
      "type": "string",
      "format": "date-time",
      "description": "Timestamp when the baseline snapshot was generated"
    },
    "has_drift": {
      "type": "boolean",
      "description": "Whether any drift was detected"
    },
    "summary": {
      "type": "object",
      "description": "Summary counts of changes by type",
      "properties": {
        "tables_added": { "type": "integer" },
        "tables_removed": { "type": "integer" },
        "tables_modified": { "type": "integer" },
        "resources_added": { "type": "integer" },
        "resources_removed": { "type": "integer" },
        "resources_modified": { "type": "integer" }
      },
      "additionalProperties": false
    },
    "table_changes": {
      "type": "array",
      "description": "List of table changes detected",
      "items": {
        "type": "object",
        "required": ["name", "change_type"],
        "properties": {
          "name": {
            "type": "string",
            "description": "Name of the table"
          },
          "change_type": {
            "type": "string",
            "enum": ["added", "removed", "modified"],
            "description": "Type of change"
          },
          "columns_added": {
            "type": "array",
            "description": "Columns that were added",
            "items": {
              "type": "object",
              "required": ["name", "type"],
              "properties": {
                "name": { "type": "string" },
                "type": { "type": "string" }
              }
            }
          },
          "columns_removed": {
            "type": "array",
            "description": "Columns that were removed",
            "items": {
              "type": "object",
              "required": ["name", "type"],
              "properties": {
                "name": { "type": "string" },
                "type": { "type": "string" }
              }
            }
          },
          "columns_modified": {
            "type": "array",
            "description": "Columns that were modified",
            "items": {
              "type": "object",
              "properties": {
                "name": { "type": "string" },
                "old_type": { "type": "string" },
                "new_type": { "type": "string" }
              }
            }
          }
        }
      }
    },
    "resource_changes": {
      "type": "array",
      "description": "List of resource changes detected",
      "items": {
        "type": "object",
        "required": ["path", "change_type"],
        "properties": {
          "path": {
            "type": "string",
            "description": "Path to the resource file"
          },
          "endpoint": {
            "type": "string",
            "description": "Endpoint identifier (e.g., 'tool/name')"
          },
          "change_type": {
            "type": "string",
            "enum": ["added", "removed", "modified"],
            "description": "Type of change"
          },
          "validation_changed": {
            "type": "boolean",
            "description": "Whether validation results changed"
          },
          "test_results_changed": {
            "type": "boolean",
            "description": "Whether test results changed"
          },
          "definition_changed": {
            "type": "boolean",
            "description": "Whether endpoint definition changed"
          },
          "details": {
            "type": "object",
            "description": "Specific details about what changed",
            "additionalProperties": true
          }
        }
      }
    }
  }
}