interface CacheEntry {
    response: string;
    model: string;
    inputTokens: number;
    outputTokens: number;
    createdAt: number;
}
export interface ResponseCacheOptions {
    enabled?: boolean;
    ttlMs?: number;
    maxEntries?: number;
}
export declare class ResponseCache {
    private cache;
    private enabled;
    private ttlMs;
    private maxEntries;
    constructor(options?: ResponseCacheOptions);
    private buildKey;
    get(contentHash: string, promptId: string, promptVersion: string): CacheEntry | null;
    set(contentHash: string, promptId: string, promptVersion: string, response: string, model: string, inputTokens: number, outputTokens: number): void;
    clear(): void;
    get size(): number;
}
export {};
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