/**
 * Gate — lets an async flow wait for an answer from the keyboard.
 *
 * Linear wizards (choose → resolve → confirm → install) read far better written
 * as one async function than as a state machine inside `onKey`. The gate is the
 * missing piece: the flow awaits `wait()`, and the key handler calls `settle()`
 * when the user decides.
 */
export interface Gate<T> {
    wait(): Promise<T>;
    /** Delivers the answer. Later calls are ignored. */
    settle(value: T): void;
    /** Interrompe quem espera, propagando o erro. */
    fail(error: unknown): void;
    /** True while somebody is waiting for an answer. */
    readonly pending: boolean;
}
export declare function createGate<T>(): Gate<T>;
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