/**
 * Auto-update version checking and update execution.
 */
export interface UpdateCheckResult {
    currentVersion: string;
    latestVersion: string;
    updateAvailable: boolean;
}
export interface UpdateResult {
    success: boolean;
    previousVersion: string;
    newVersion: string;
    error?: string;
}
export interface VersionInfo {
    package: string;
    version: string;
    bun: string;
    os: string;
    arch: string;
    configPath: string;
}
export interface DoctorCheck {
    name: string;
    status: "ok" | "warn" | "error";
    message: string;
}
/**
 * Compare two semver strings. Returns true if `latest` is newer than `current`.
 */
export declare function isNewerVersion(current: string, latest: string): boolean;
/**
 * Check npm registry for latest version.
 */
export declare function checkForUpdate(currentVersion: string): Promise<UpdateCheckResult>;
/**
 * Perform the update via bun global install.
 */
export declare function performUpdate(): Promise<UpdateResult>;
export declare function getCurrentVersion(): string;
export declare function setCurrentVersion(version: string): void;
/**
 * Get full version info for /version command.
 */
export declare function getVersionInfo(): VersionInfo;
/**
 * Run diagnostic checks for /doctor command.
 */
export declare function runDiagnostics(config?: any): Promise<DoctorCheck[]>;
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