export declare function resetCounters(): void;
export declare function getHitsForTest(): number;
export declare function getMissesForTest(): number;
export interface CacheEntry {
    key: string;
    url: string;
    prompt: string;
    model: string;
    answer: string;
    fetchedAt: number;
    ttlMinutes: number;
}
export interface CacheStats {
    entries: number;
    hits: number;
    misses: number;
    oldest: number | null;
    newest: number | null;
    sizeBytes: number;
    ttlMinutes: number;
    ok: boolean;
}
export declare function getCacheKey(url: string, prompt: string, model: string): string;
export interface PurgeExpiredResult {
    removed: number;
    remaining: number;
    saved: boolean;
}
export declare function clearCache(cacheFilePath: string): boolean;
export declare function purgeExpired(cacheFilePath: string): PurgeExpiredResult;
export declare function getCached(url: string, prompt: string, model: string, _ttlMinutes: number, cacheFilePath: string): string | null;
export declare function getCachedForModels(url: string, prompt: string, models: readonly string[], _ttlMinutes: number, cacheFilePath: string): string | null;
export declare function getCacheStats(cacheFilePath: string, ttlMinutes: number): CacheStats;
export declare function putCache(url: string, prompt: string, model: string, answer: string, ttlMinutes: number, cacheFilePath: string): void;