export interface NativeTerminal {
    /** Check whether fd is an interactive terminal (Posix.isatty). */
    is_tty(fd: number): boolean;
    /**
     * Get terminal dimensions via ioctl(TIOCGWINSZ).
     * Returns [success, rows, cols, xpixel, ypixel].
     */
    get_size(fd: number): [boolean, number, number, number, number];
    /** Enter/leave raw mode via termios (disables line-buffering + echo). */
    set_raw_mode(fd: number, enable: boolean): boolean;
}
export interface NativeResizeWatcherClass {
    new (): NativeResizeWatcher;
}
export interface NativeResizeWatcher {
    /** Start watching SIGWINCH.  Idempotent. */
    start(): void;
    connect(signal: 'resized', handler: (obj: NativeResizeWatcher, rows: number, cols: number) => void): number;
    disconnect(id: number): void;
}
export interface GjsifyTerminalModule {
    Terminal: NativeTerminal;
    ResizeWatcher: NativeResizeWatcherClass;
}
/** The native GjsifyTerminal module, or null if not installed. */
export declare const nativeTerminal: GjsifyTerminalModule | null;
/** Returns true when the GjsifyTerminal native library is available. */
export declare function hasNativeTerminal(): boolean;