/**
 * Check whether sudo credentials are already cached.
 * Returns true if `sudo -n true` succeeds (no password needed).
 */
export declare function isSudoCached(): boolean;
/**
 * Ensure sudo credentials are available before Ink captures stdin.
 *
 * 1. If already cached, returns silently.
 * 2. Otherwise, warns the user and runs `sudo -v` which prompts
 *    for their password using the real terminal.
 *
 * Must be called BEFORE Ink render().
 * Calls process.exit(1) if authentication fails.
 */
export declare function ensureSudo(templateName: string): void;