import type { SentimentSnapshot } from '../types.js';
/** Override cache directory (for testing) */
export declare function _setCacheDir(dir: string): void;
/** Get current cache directory */
export declare function _getCacheDir(): string;
export declare function readCache(): SentimentSnapshot | null;
export declare function writeCache(snapshot: SentimentSnapshot): void;
export declare function isCacheFresh(ttlSeconds?: number): boolean;
export declare function getCachedOrCompute(options?: {
    ttlSeconds?: number;
    noCache?: boolean;
    computeFn?: () => Promise<SentimentSnapshot>;
}): Promise<SentimentSnapshot>;