/**
 * Network utilities for OAuth flow.
 *
 * Provides fetch wrapper with single retry for transient network errors.
 *
 * @internal This module is not exported from the main package.
 */
/**
 * Fetch with single retry on network errors.
 *
 * Retries ONLY on network failures (fetch throws), not HTTP error responses.
 * Caller is responsible for handling HTTP status codes.
 *
 * @param url - URL to fetch
 * @param options - Fetch options
 * @returns Response (may have error status code)
 * @throws AuthError with code 'network_error' if both attempts fail
 */
export declare function fetchWithRetry(url: string, options: RequestInit): Promise<Response>;
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