export declare const ui: {
    header: (msg: string) => void;
    ok: (msg: string) => void;
    warn: (msg: string) => void;
    error: (msg: string) => void;
    info: (key: string, val: string) => void;
    step: (msg: string) => void;
    blank: () => void;
};
export declare function requireRoot(): void;
/**
 * Yes/no prompt. Returns false when stdin isn't a TTY (so scripted callers must
 * pass an explicit --yes flag rather than hanging or silently proceeding).
 */
export declare function confirm(question: string): Promise<boolean>;