/**
 * Fetch the latest published version of convoai from npm.
 * Returns null on network error or if version is missing from response.
 */
export declare function fetchLatestVersion(): Promise<string | null>;
/**
 * Check if a newer version of convoai is available on npm.
 * Non-blocking — runs silently, only prints if update is found.
 */
export declare function checkForUpdate(currentVersion: string): Promise<void>;
export declare function isNewer(latest: string, current: string): boolean;