export type ClarificationChannelRuntime = {
    answerChoice(requestId: string, choiceIndex: number, idempotencyKey: string): boolean;
    answerText(sessionKey: string, text: string, idempotencyKey: string): boolean;
};
export declare function registerClarificationChannelRuntime(next: ClarificationChannelRuntime | null): void;
export declare function answerClarificationChoiceFromChannel(requestId: string, choiceIndex: number, idempotencyKey: string): boolean;
export declare function answerClarificationTextFromChannel(sessionKey: string, text: string, idempotencyKey: string): boolean;