interface MutableSlot<T> {
    current: T;
}
export interface StartPromptRefinementOptions<T> {
    original: string;
    controller: AbortController;
    originalSlot: MutableSlot<string>;
    abortSlot: MutableSlot<AbortController | null>;
    setStartedAt: (startedAt: number) => void;
    setBusy: (on: boolean) => void;
    clearDraft: () => void;
    prepareContext: () => Promise<T>;
    fallbackContext: T;
    now?: () => number;
}
/**
 * Enter the visible refiner state synchronously, then perform optional async
 * context preparation. Nothing in `prepareContext` may delay acknowledgement
 * of the user's submit.
 */
export declare function startPromptRefinement<T>(options: StartPromptRefinementOptions<T>): Promise<T>;
export {};
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