import type { PackageManifest } from './package-registry-types.js';
export interface PackageManifestCacheStats {
    size: number;
    maxSize: number;
    packageIds: string[];
    hits: number;
    misses: number;
    evictions: number;
    staleEvictions: number;
}
export declare class PackageManifestCache {
    private readonly cache;
    private readonly maxCacheEntries;
    private readonly cacheTTL;
    private cacheHits;
    private cacheMisses;
    private cacheEvictions;
    private staleEvictions;
    constructor(maxCacheEntries: number, cacheTTL?: number);
    get(packageId: string): PackageManifest | null;
    set(packageId: string, manifest: PackageManifest): void;
    clear(): void;
    getStats(): PackageManifestCacheStats;
}
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