/**
 * Web search with cascading free-tier chain:
 * 1. Google Custom Search API (100/day free)
 * 2. Brave Search API (1000/month free)
 * 3. Bing HTML scraping (unlimited, lower quality)
 *
 * Each provider tracks usage locally; auto-falls to next when quota exceeded.
 * API keys: leaper.yaml search.googleApiKey/googleCxId/braveApiKey, or env vars.
 */
interface SearchConfig {
    googleApiKey?: string;
    googleCxId?: string;
    braveApiKey?: string;
}
export declare function configureSearch(config: SearchConfig, dataDir?: string): void;
export declare function webSearch(query: string): Promise<string>;
export {};
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