declare const DEFAULT_USER_AGENT = "rolebox-web-tool/1.0 (Bun; +https://github.com/EricMoin/rolebox)";
declare const BROWSER_USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36";
export declare class TokenBucket {
    private tokens;
    private lastRefill;
    private readonly maxTokens;
    private readonly refillRatePerMs;
    constructor(ratePerMinute: number);
    acquire(): Promise<void>;
    private refill;
}
export declare function fetchWithTimeout(url: string, options?: RequestInit, timeoutMs?: number): Promise<Response>;
export declare function fetchWithRetry(url: string, options?: RequestInit, maxRetries?: number, baseDelayMs?: number): Promise<Response>;
/**
 * Fetch a URL with Cloudflare bot-detection retry.
 *
 * First attempt uses browser-like headers. If the response is HTTP 403
 * with Cloudflare challenge indicators (cf-mitigated header or challenge page),
 * retries once with a simplified User-Agent.
 */
export declare function fetchWithCloudflareRetry(url: string, options?: RequestInit, timeoutMs?: number): Promise<Response>;
export { DEFAULT_USER_AGENT, BROWSER_USER_AGENT };
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