import * as fs from 'fs';
export interface WalkOptions {
    excludeDirs?: string[];
    excludeHiddenDirs?: boolean;
    maxDepth?: number;
    filterExt?: string[];
}
/**
 * Generic recursive directory walker with callback pattern.
 * Replaces 8+ duplicate walk() implementations across analyzers.
 */
export declare function walkDirectory(dir: string, options: WalkOptions, callback: (fullPath: string, entry: fs.Dirent) => void, depth?: number): void;
/**
 * Collects file paths matching a single extension.
 * Convenience wrapper for the common "find all .ts files" pattern.
 */
export declare function findFilesByExtension(dir: string, ext: string, excludeDirs: string[], excludeHiddenDirs?: boolean): string[];