export type ChildQuestionMethod = "select" | "confirm" | "input" | "editor";
export interface ChildQuestionEvent {
    requestId: string;
    method: ChildQuestionMethod;
    title: string;
    message?: string;
    options?: string[];
    placeholder?: string;
    prefill?: string;
    /** Nominal for a held question, which has no deadline. */
    timeout: number;
    /** The run holds this question for a person with no deadline. */
    hold?: true;
}
export type ChildQuestionFrame = {
    type: "extension_ui_response";
    id: string;
    value: string;
} | {
    type: "extension_ui_response";
    id: string;
    confirmed: boolean;
} | {
    type: "extension_ui_response";
    id: string;
    cancelled: true;
};
export declare class ChildQuestionRelay {
    #private;
    readonly defaultTimeoutMs: number;
    readonly io: {
        emit(question: ChildQuestionEvent): void;
        send(frame: ChildQuestionFrame): void;
        /** Blocked since a time, with the decision of the oldest question that has one; undefined when unblocked. */
        blocked(since: number | undefined, decisionId?: string): void;
    };
    readonly now: () => number;
    readonly options: {
        hold?: boolean;
    };
    constructor(defaultTimeoutMs: number, io: {
        emit(question: ChildQuestionEvent): void;
        send(frame: ChildQuestionFrame): void;
        /** Blocked since a time, with the decision of the oldest question that has one; undefined when unblocked. */
        blocked(since: number | undefined, decisionId?: string): void;
    }, now?: () => number, options?: {
        hold?: boolean;
    });
    get pending(): number;
    /** Handle one select/confirm/input/editor request (routing it or cancelling it); false when malformed. */
    request(event: Record<string, unknown>): boolean;
    /** Apply a parent `ui_decision` steer command naming the decision behind a pending question. */
    decide(command: Record<string, unknown>): boolean;
    /** Apply a parent `ui_response` steer command; unknown or stale ids are ignored. */
    respond(command: Record<string, unknown>): boolean;
    close(): void;
}
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