/**
 * Extract a .tar.gz archive to a destination directory.
 * Pure JavaScript — no system `tar` command needed.
 */
export declare function extractTarGz(archivePath: string, destDir: string): Promise<void>;
/**
 * Extract a .zip archive to a destination directory.
 * Pure JavaScript — no PowerShell or system unzip needed.
 */
export declare function extractZip(archivePath: string, destDir: string): void;