/**
 * Web Search Integration for Grounding
 *
 * Provides web search and page fetching capabilities for claim verification.
 * Uses Brave Search API for search and axios for page fetching.
 * Includes LRU caching to avoid duplicate API calls.
 */
export interface SearchResult {
    url: string;
    title: string;
    snippet: string;
}
/**
 * Search the web using Brave Search API.
 * Requires BRAVE_API_KEY environment variable.
 * Results are cached for 24 hours to avoid duplicate API calls.
 */
export declare function webSearch(query: string): Promise<SearchResult[]>;
/**
 * Fetch a web page and extract text content.
 * Strips HTML tags and returns plain text.
 * Results are cached for 7 days to avoid duplicate fetches.
 */
export declare function fetchPage(url: string): Promise<string>;
/**
 * Create search and fetch functions bound to the web search API.
 * This is the interface expected by the grounding module.
 */
export declare function createWebSearchInterface(): {
    search: (query: string) => Promise<SearchResult[]>;
    fetch: (url: string) => Promise<string>;
};
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