import type { Api, Model, SimpleStreamOptions } from '@earendil-works/pi-ai';
import { type PromptCachePlan, type PromptCachePolicy } from './prompt-cache-plan.js';
export declare function buildPromptCacheKey(model: Model<Api>, context: {
    systemPrompt?: string;
    tools?: unknown[];
}, reasoning?: string): string;
export declare function buildPromptCachePlan(model: Model<Api>, context: {
    systemPrompt?: string;
    tools?: unknown[];
}, policyInput?: PromptCachePolicy, reasoning?: string): PromptCachePlan;
export declare function transformPromptCachePayload(model: Model<Api>, payload: unknown, plan?: PromptCachePlan, context?: {
    systemPrompt?: string;
}): unknown;
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, policyInput?: PromptCachePolicy): SimpleStreamOptions;