export interface UpdateInfo {
    currentVersion: string;
    latestVersion: string;
}
export declare function checkForUpdates(updatePolicy: 'notify' | 'auto' | 'off'): UpdateInfo | null;
export declare function hasUpdateCache(): boolean;
export declare function coldStartUpdateCheck(updatePolicy: 'notify' | 'auto' | 'off'): Promise<UpdateInfo | null>;
export declare function printUpdateBanner(info: UpdateInfo): void;
export declare function writePendingUpdateMarker(targetVersion: string): void;
export declare function writeUpdateCache(latestVersion: string): void;
export declare function fetchLatestVersion(timeoutMs?: number, url?: string): Promise<string | undefined>;
export declare function triggerAutoUpdate(latestVersion: string): void;
export declare function checkPendingUpdate(): void;