import type { StorageBackend } from './types';
export type { StorageBackend } from './types';
/**
 * Returns the singleton storage backend.
 *
 * Backend selection (via LT_STORAGE_BACKEND env var):
 *   "local" (default) — filesystem storage under LT_FILE_STORAGE_DIR
 *   "s3"              — S3-compatible (MinIO, AWS S3, GCP Cloud Storage)
 */
export declare function getStorageBackend(): StorageBackend;
/** Reset the singleton (for testing). */
export declare function resetStorageBackend(): void;