/**
 * Path validation utilities for configuration files.
 * Provides basic path validation to prevent path traversal attacks.
 */
/**
 * Validates that a path is within an allowed directory.
 *
 * @param configPath - The path to validate
 * @param allowedDirs - Array of allowed parent directories
 * @returns true if path is valid, false otherwise
 */
export declare function isValidConfigPath(configPath: string, allowedDirs: string[]): boolean;
/**
 * Ensures a path is absolute and normalized.
 *
 * @param configPath - The path to sanitize
 * @returns Normalized absolute path
 */
export declare function sanitizeConfigPath(configPath: string): string;
/**
 * Validates that a filename doesn't contain path traversal characters.
 *
 * @param filename - The filename to validate
 * @returns true if filename is safe, false otherwise
 */
export declare function isSafeFilename(filename: string): boolean;
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