Array of model metadata. */ public function listModelMetadata(): array; /** * Checks if metadata exists for a specific model. * * @since 0.1.0 * * @param string $modelId Model identifier. * @return bool True if metadata exists, false otherwise. */ public function hasModelMetadata(string $modelId): bool; /** * Gets metadata for a specific model. * * @since 0.1.0 * * @param string $modelId Model identifier. * @return ModelMetadata Model metadata. * @throws InvalidArgumentException If model metadata not found. */ public function getModelMetadata(string $modelId): ModelMetadata; }