/**
 * ModuleConfigCache — generic LRU cache for module config lookups
 *
 * Provides a bounded, TTL-based cache for runtime config discovery
 * (billing config, agent discovery, inference log info, etc.).
 *
 * Wraps lru-cache with:
 * - LRU eviction (bounded memory)
 * - TTL-based expiry
 * - Named logging for debugging
 * - clear() hook for future LISTEN/NOTIFY invalidation
 */
export interface ModuleConfigCacheOptions {
    /** Cache name (used in log prefix) */
    name: string;
    /** Max entries before LRU eviction (default: 100) */
    max?: number;
    /** TTL in milliseconds (default: 60_000) */
    ttlMs?: number;
}
export declare class ModuleConfigCache<T> {
    private cache;
    private log;
    readonly name: string;
    constructor(opts: ModuleConfigCacheOptions);
    get(key: string): T | undefined;
    set(key: string, value: T): void;
    delete(key: string): boolean;
    clear(): void;
    get size(): number;
    has(key: string): boolean;
}