/**
 * Manifest Registry Resolver
 *
 * Fetches and caches registry manifests from remote URLs.
 * Supports HTTP(S) manifest-based registries.
 */
import type { RegistryManifest, RegistryConfig, PluginManifest } from '../types.js';
import { ManifestCacheManager } from '../cache.js';
export interface FetchOptions {
    /** Force refresh (ignore cache) */
    force?: boolean;
    /** Request timeout in milliseconds */
    timeout?: number;
}
export interface ManifestFetchResult {
    /** Fetched manifest */
    manifest: RegistryManifest;
    /** Whether manifest was loaded from cache */
    fromCache: boolean;
    /** Age of cached manifest in seconds (if from cache) */
    cacheAge?: number;
}
export declare class ManifestResolver {
    private cache;
    constructor(cache?: ManifestCacheManager);
    /**
     * Fetch content from URL
     */
    private fetchUrl;
    /**
     * Verify SHA-256 checksum
     */
    private verifyChecksum;
    /**
     * Fetch registry manifest
     */
    fetchManifest(registry: RegistryConfig, options?: FetchOptions): Promise<ManifestFetchResult>;
    /**
     * Fetch plugin manifest from URL
     */
    fetchPluginManifest(url: string, expectedChecksum?: string, options?: FetchOptions): Promise<PluginManifest>;
    /**
     * Search for plugin across registries
     */
    searchPlugin(pluginName: string, registries: RegistryConfig[]): Promise<{
        manifest: RegistryManifest;
        pluginRef: any;
        registry: RegistryConfig;
    } | null>;
    /**
     * Get all plugins from all enabled registries
     */
    getAllPlugins(registries: RegistryConfig[]): Promise<Array<{
        pluginRef: any;
        registry: RegistryConfig;
    }>>;
    /**
     * Refresh manifest cache for a registry
     */
    refresh(registry: RegistryConfig): Promise<void>;
    /**
     * Invalidate cache for a registry
     */
    invalidate(registryName: string): Promise<void>;
    /**
     * Get cache statistics
     */
    getCacheStats(): Promise<import("../cache.js").CacheStats>;
    /**
     * Clean up expired cache entries
     */
    cleanupCache(): Promise<number>;
}
/**
 * Default manifest resolver instance
 */
export declare const manifestResolver: ManifestResolver;
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