import type { Api, Model, SimpleStreamOptions } from '@earendil-works/pi-ai';
export declare function transformPromptCachePayload(model: Model<Api>, payload: unknown): unknown;
export declare function buildPromptCacheKey(model: Model<Api>, context: {
    systemPrompt?: string;
    tools?: unknown[];
}): string;
export declare function preparePromptCacheContext<T extends {
    systemPrompt?: string;
}>(model: Model<Api>, context: T): T;
export declare function withPromptCachePayloadTransform(model: Model<Api>, context: {
    systemPrompt?: string;
    tools?: unknown[];
}, options: SimpleStreamOptions | undefined): SimpleStreamOptions | undefined;