declare const CHECK_INTERVAL_MS: number;
declare const FETCH_TIMEOUT_MS = 2000;
export { CHECK_INTERVAL_MS, FETCH_TIMEOUT_MS };
export declare function canAttemptSilentUpgrade(): Promise<boolean>;
export declare function recordSilentUpgradeAttempt(): Promise<void>;
export type UpdateMode = "silent" | "notify" | "off";
export interface UpdateCheckResult {
    hasUpdate: boolean;
    currentVersion: string;
    latestVersion: string | null;
    fetchError: "network" | "not_found" | "server_error" | null;
}
export declare function checkForUpdates(currentVersion: string, forceRefresh?: boolean, mode?: UpdateMode): Promise<UpdateCheckResult>;
export interface NotifyUpdateOptions {
    migrateCommand?: string;
}
export declare function notifyUpdate(result: UpdateCheckResult, options?: NotifyUpdateOptions): void;
export declare function startUpdateCheck(currentVersion: string, mode?: UpdateMode): Promise<UpdateCheckResult>;
export declare function cancelUpdateCheck(): void;