/**
 * MartinLoop Arcade — Space Invaders
 *
 * A terminal Space Invaders game that runs while a background task is in
 * flight. Resolves with the task result when the task completes and the
 * user exits, or immediately falls through if the terminal is not suitable.
 *
 * Zero external dependencies. Node 18+ required.
 *
 * Controls
 *   ← → / A D   move
 *   Space / ↑ / Z   fire
 *   P   pause / unpause
 *   R   restart  (game over screen only)
 *   Q   quit
 */
export interface ArcadeOptions<T = unknown> {
    /**
     * Short label shown in the run-complete overlay beneath the ∞ header.
     * E.g. "verified · 1 attempt · $0.18 spent"
     */
    runResultLabel?: string | ((result: T) => string);
}
/**
 * Play a Space Invaders game in the terminal while `task` runs in the
 * background. Returns the same value `task` resolves with.
 *
 * Gracefully skips the game (returns `task` directly) when:
 *   - stdout / stdin are not interactive TTYs
 *   - CI environment variable is set
 *   - Terminal is too small (< 50 cols or < 18 rows)
 */
export declare function playWhileWaiting<T>(task: Promise<T>, opts?: ArcadeOptions<T>): Promise<T>;