/**
 * SMI-585: L1 In-Memory LRU Cache
 * Fast in-memory cache for frequently accessed search results
 */
export interface SearchCacheEntry {
    results: SearchResult[];
    totalCount: number;
    timestamp: number;
}
export interface SearchResult {
    id: string;
    name: string;
    description: string;
    score: number;
    source: string;
}
export interface CacheStats {
    hits: number;
    misses: number;
    hitRate: number;
    size: number;
    maxSize: number;
}
export declare class L1Cache {
    private cache;
    private hits;
    private misses;
    constructor(maxSize?: number);
    /**
     * Generate cache key from query and filters
     */
    static generateKey(query: string, filters?: Record<string, unknown>): string;
    /**
     * Get cached search results
     */
    get(key: string): SearchCacheEntry | undefined;
    /**
     * Store search results in cache
     */
    set(key: string, results: SearchResult[], totalCount: number): void;
    /**
     * Check if key exists in cache
     */
    has(key: string): boolean;
    /**
     * Delete specific cache entry
     */
    delete(key: string): boolean;
    /**
     * Clear all cache entries
     */
    clear(): void;
    /**
     * Invalidate all search-related entries
     * Called when the skill index is updated
     */
    invalidateAll(): void;
    /**
     * Get cache statistics
     */
    getStats(): CacheStats;
    /**
     * Prune expired entries
     */
    prune(): void;
}
export default L1Cache;
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