import type { CacheStats, LookupTable } from './types';
export declare const DEFAULT_CACHE_SIZE = 100;
/** Internal — used by `core.ts` for read/write. */
export declare function cacheGet(key: string): LookupTable | undefined;
export declare function cacheSet(key: string, value: LookupTable): void;
/** Drop every entry. Useful between tests and for long-running processes. */
export declare function clearCache(): void;
/** Live entry count (does not include keys evicted by the LRU). */
export declare function getCacheSize(): number;
/** Snapshot — helpful for `/health` endpoints in serverless adapters. */
export declare function getCacheStats(): CacheStats;
/**
 * Resize the cache. Existing entries are migrated newest-first up to the new
 * ceiling; any overflow is dropped. Calling this with the current size is a
 * no-op (kept for symmetry with `clearCache`).
 */
export declare function setCacheSize(size: number): void;