import type { Api, Model } from '@earendil-works/pi-ai';
import type { PromptCachePolicy } from './prompt-cache-plan.js';
export declare function applyGoogleManagedPromptCache(params: {
    model: Model<Api>;
    context: {
        systemPrompt?: string;
    };
    payload: unknown;
    policy: PromptCachePolicy;
    apiKey?: string;
    fetchImpl?: typeof fetch;
    now?: number;
}): Promise<unknown>;
export declare function clearGoogleManagedPromptCaches(): void;