/**
 * Interactive Prompts
 * Hand-rolled on node:readline — no external prompt dependency.
 * Callers should check isInteractive() before calling confirm/input/select;
 * calling them without a TTY throws a CliError.
 */
/** Test hook: inject streams and TTY-ness. Call with no args to reset. */
export declare function _setStreamsForTest(stdin?: NodeJS.ReadableStream, stdout?: NodeJS.WritableStream, forceTTY?: boolean): void;
/** True iff we can safely prompt: real TTY, not CI, not --json mode. */
export declare function isInteractive(): boolean;
/**
 * Yes/no confirmation. Empty answer takes the default (No unless
 * defaultNo: false). Re-asks on unrecognized input, max 3 attempts
 * then returns the default.
 */
export declare function confirm(question: string, opts?: {
    defaultNo?: boolean;
}): Promise<boolean>;
/**
 * Free-text input. validate returns true or an error message (which is
 * displayed before re-asking). secret: true suppresses echo via a muted
 * output stream (the standard readline trick).
 */
export declare function input(question: string, opts?: {
    validate?: (s: string) => string | true;
    default?: string;
    secret?: boolean;
}): Promise<string>;
/** Numbered-list selection; re-asks until a valid number is entered. */
export declare function select<T>(question: string, choices: Array<{
    label: string;
    value: T;
    hint?: string;
}>): Promise<T>;