export declare function pathExists(filePath: string): Promise<boolean>;
/** Exported for tests: parse `du -sk` output ("<KB>\t<path>") into bytes. */
export declare function parseDuOutput(stdout: string): number | null;
export declare function getDirectorySize(dirPath: string, _skipLargeDirectories?: boolean, timeoutMs?: number): Promise<number>;
export declare function getEstimatedDirectorySize(dirPath: string): Promise<number>;
export declare function safeRmrf(targetPath: string): Promise<void>;
export declare function createDirectoryIfNotExists(dirPath: string): Promise<void>;
export declare function isWritable(dirPath: string): Promise<boolean>;
export declare function getDiskSpace(dirPath: string): Promise<{
    free: number;
    total: number;
} | null>;
export declare function getFileModificationTime(filePath: string): Promise<Date | null>;
export declare function sanitizePath(inputPath: string): string;
export declare function getCacheSize(dirPath: string): Promise<number>;
export declare function clearPaths(paths: string[]): Promise<void>;
/**
 * Get directory size with caching (2-minute TTL)
 * Use this for repeated size calculations on the same paths
 */
export declare function getCachedDirectorySize(dirPath: string, skipLargeDirectories?: boolean, timeoutMs?: number): Promise<number>;
/**
 * Get estimated directory size with caching (2-minute TTL)
 */
export declare function getCachedEstimatedDirectorySize(dirPath: string): Promise<number>;
/**
 * Invalidate size cache for a path (call after clearing)
 */
export declare function invalidateSizeCache(dirPath: string): void;
/**
 * Invalidate all size caches matching a prefix
 */
export declare function invalidateSizeCachePrefix(prefix: string): void;
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