/**
 * Fire-and-forget check for a newer version on npm.
 * Prints a one-liner to stderr if an update is available.
 * Network failures are silently ignored.
 */
export declare function checkForUpdate(currentVersion: string): void;
/**
 * Simple numeric version comparison (major.minor.patch).
 * Returns true if `latest` is strictly newer than `current`.
 */
export declare function isNewer(latest: string, current: string): boolean;
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