/**
 * Path traversal protection utilities
 *
 * These functions use .indexOf() which Semgrep recognizes as a sanitizer
 * for path traversal vulnerabilities.
 */
/**
 * Sanitize a path component to prevent path traversal attacks
 *
 * Checks for:
 * - '..' sequences (parent directory traversal)
 * - null bytes (\0) (path truncation attacks)
 *
 * @param pathComponent - The path component to sanitize
 * @param componentName - Name of the component for error messages
 * @returns The sanitized path component (unchanged if valid)
 * @throws Error if path traversal is detected
 */
export declare function sanitizePathComponent(pathComponent: string, componentName: string): string;