/**
 * One subscription point for terminal size.
 *
 * Eleven components and hooks each did this by hand:
 *
 * ```ts
 * const { stdout } = useStdout();
 * const [w, setW] = useState(stdout?.columns ?? 90);
 * useEffect(() => {
 *   const handleResize = () => setW(stdout?.columns ?? 90);
 *   handleResize();
 *   process.stdout.on('resize', handleResize);
 *   return () => process.stdout.off('resize', handleResize);
 * }, [stdout]);
 * ```
 *
 * Three problems, all of them invisible until they aren't:
 *
 *  - **Listener budget.** Every copy attaches its own listener to
 *    `process.stdout`, and nothing raises the limit. Seven of these are
 *    mounted for the whole session (status bar, history, input,
 *    monitor-shell, sidebar frame, viewport sync, render lifecycle); open the
 *    fleet, mailbox and enhance panels and Node prints
 *    `MaxListenersExceededWarning` to stderr — straight through the middle of
 *    a rendered frame.
 *  - **Two different streams.** They SUBSCRIBE to `process.stdout` but READ
 *    from Ink's `useStdout()`. Those are the same object in a normal run and
 *    different objects under Ink's test renderer, where the listener then
 *    fires for a stream nobody reads.
 *  - **Three defaults.** `?? 90`, `?? 80` and `?? 24` all appear, so the same
 *    non-TTY produces different layouts in different panels.
 *
 * Core already exports `onResize(cb, stream)` for this and had no callers.
 * This hook is the React shape of it: subscribe to the stream you read, with
 * the fallback stated once per call site rather than remembered.
 */
export interface TerminalSize {
    readonly columns: number;
    readonly rows: number;
}
export interface UseTerminalSizeOptions {
    /**
     * Upper bound applied to `columns`. Panels use this to stay inside a pinned
     * content width — see the bordered-box overflow rule.
     */
    readonly maxWidth?: number | undefined;
    /**
     * Column count when the stream reports none (a pipe, a test renderer).
     * Deliberately explicit: the call sites this replaced disagreed (90 vs 80),
     * and quietly picking one would have moved layouts in non-TTY runs.
     */
    readonly fallbackColumns?: number | undefined;
    /** Row count when the stream reports none. */
    readonly fallbackRows?: number | undefined;
}
export declare function useTerminalSize(options?: UseTerminalSizeOptions): TerminalSize;
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