export declare class VersionCheckService {
    private static instance;
    latestVersion: string;
    private currentVersion;
    private constructor();
    static getInstance(): VersionCheckService;
    setCurrentVersion(version: string): void;
    /**
     * Fetch latest version from GitHub
     */
    fetchLatestVersion(): Promise<void>;
    /**
     * Check if update is available
     */
    isUpdateAvailable(): Promise<boolean>;
    /**
     * Get current version
     */
    getCurrentVersion(): string;
    /**
     * Compare two version strings
     */
    private compareVersions;
}
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