/**
 * Follow-ups that must run after one prompt, in order (`PromptOptions.followUps`).
 *
 * They stay off the queue until their prompt reaches the agent: its run goes live, it lands
 * on a queue, or a local command finishes handling it. Until then no drain or other run can
 * deliver them ahead of it, and a prompt that never gets there hands them back with itself.
 */
export declare class PromptFollowUps {
    #private;
    constructor(texts: readonly string[], enqueue: (texts: readonly string[]) => void);
    /** The prompt reached the agent: queue the follow-ups behind it. */
    release(): void;
    /** True until the follow-ups are released or handed back. */
    get held(): boolean;
    /** The prompt never reached the agent: return the follow-ups, once; `[]` after release or a prior hand-back. */
    handBack(): string[];
}