{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://yao.example/registry-index.schema.json",
  "title": "Yao Skill Registry Index",
  "type": "object",
  "additionalProperties": false,
  "required": ["schema_version", "generated_at", "package_count", "packages"],
  "properties": {
    "schema_version": {"const": "2.0"},
    "generated_at": {"type": "string"},
    "package_count": {"type": "integer", "minimum": 0},
    "packages": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": ["name", "version", "maturity", "owner", "targets", "package_metadata", "package_sha256"],
        "properties": {
          "name": {"type": "string", "minLength": 1},
          "version": {"type": "string", "minLength": 1},
          "maturity": {"type": "string", "minLength": 1},
          "owner": {"type": "string", "minLength": 1},
          "targets": {"type": "array", "items": {"type": "string"}},
          "package_metadata": {"type": "string", "minLength": 1},
          "package_sha256": {"type": "string", "minLength": 64, "maxLength": 64}
        }
      }
    }
  }
}