import { MigrationFile } from '../types';
/**
 * Calculate checksum of a file
 */
export declare const calculateChecksum: (filePath: string) => string;
export interface MigrationLoaderHandle {
    loadMigrations(): Promise<MigrationFile[]>;
    invalidateCache(): void;
    getPendingMigrations(appliedVersions: string[]): Promise<MigrationFile[]>;
    getMigration(version: string): Promise<MigrationFile | null>;
    getNextVersion(): Promise<string>;
    calculateChecksum(filePath: string): string;
}
/**
 * Create a migration loader for the given directory.
 *
 * Internally memoizes `loadMigrations()` — the runner consults the loader
 * many times per command (per-version checksum check, per-rollback
 * lookup, status display) — without this, each call re-runs `readdirSync`,
 * re-imports every migration module, and re-md5s every file, turning an
 * O(N) operation into O(N²) in IO and require()s. Call `invalidateCache()`
 * if you need to pick up newly-added files mid-process.
 */
export declare const createMigrationLoader: (migrationsDir: string) => MigrationLoaderHandle;
//# sourceMappingURL=loader.d.ts.map