export interface LRUCacheConfig {
    /** Maximum number of cached entries (default: 1000) */
    maxSize?: number;
    /** Time-to-live in milliseconds (default: 300_000 = 5 minutes) */
    ttlMs?: number;
}
export declare class ScanLRUCache<V = unknown> {
    private cache;
    private readonly maxSize;
    private readonly ttlMs;
    constructor(config?: LRUCacheConfig);
    /** Get a cached value. Returns undefined on miss or expiry. Promotes to MRU on hit. */
    get(key: string): V | undefined;
    /** Store a value. Evicts LRU entry if at capacity. */
    set(key: string, value: V): void;
    /** Check if key exists and is not expired */
    has(key: string): boolean;
    /** Delete a specific key */
    delete(key: string): boolean;
    /** Clear all entries */
    clear(): void;
    /** Current number of entries (may include expired) */
    get size(): number;
    /** Remove all expired entries. Returns count of removed entries. */
    prune(): number;
}
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