import type { StorageDriver } from '../types.ts';
/**
 * A file-system-backed storage driver for Node.js environments.
 *
 * Persists key-value data as JSON on disk. Useful for CLI tools,
 * server-side caching, or any scenario where browser storage APIs
 * are unavailable.
 *
 * @example
 *
 *     const driver = new FileSystemDriver('./data/settings.json');
 *     await driver.set('theme', 'dark');
 *     const theme = await driver.get('theme'); // 'dark'
 */
export declare class FileSystemDriver implements StorageDriver {
    constructor(filePath: string);
    get(key: string): Promise<unknown>;
    set(key: string, value: unknown): Promise<void>;
    remove(key: string): Promise<void>;
    keys(): Promise<string[]>;
    clear(): Promise<void>;
}