import type { CachedDocument, CacheStatus } from './types.js';
interface CacheConfig {
    storage: 'indexeddb' | 'localstorage';
    maxAge: number;
}
/**
 * Document cache for offline RAG fallback
 */
export declare class CyberneticCache {
    private config;
    private db;
    private dbPromise;
    private documentCount;
    private lastSyncAt;
    constructor(config: CacheConfig);
    /**
     * Load metadata from localStorage
     */
    private loadLocalStorageMetadata;
    /**
     * Initialize IndexedDB
     */
    private initDB;
    /**
     * Get database instance
     */
    private getDB;
    /**
     * Load cached metadata (count, last sync)
     */
    private loadMetadata;
    /**
     * Store documents in cache
     */
    store(documents: CachedDocument[]): Promise<void>;
    /**
     * Retrieve all cached documents
     */
    retrieve(): Promise<CachedDocument[]>;
    /**
     * Get last sync timestamp
     */
    getLastSync(): Promise<string | null>;
    /**
     * Get cache status
     */
    getStatus(): CacheStatus;
    /**
     * Clear all cached data
     */
    clear(): Promise<void>;
    private storeLocalStorage;
    private retrieveLocalStorage;
}
export {};
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