export declare const UPDATE_COMMAND = "npm install -g @cargo-ai/cli@latest";
export type UpdateCache = {
    /** Epoch milliseconds of the last successful registry check. */
    lastCheck: number;
    /** Latest version reported by the npm registry at that time. */
    latestVersion: string;
};
/**
 * Fetch the latest published version of the CLI from the npm registry.
 * Throws on network error, timeout, or unexpected response shape — callers
 * decide whether to surface or swallow the failure.
 */
export declare function fetchLatestVersion(timeoutMs?: number): Promise<string>;
/**
 * Compare two semver-ish strings. Returns 1 if `a > b`, -1 if `a < b`, 0 if
 * equal. Only the major.minor.patch core is compared numerically; a version
 * carrying a prerelease tag (e.g. `1.2.0-beta.1`) ranks below the same core
 * without one, matching semver precedence rules.
 */
export declare function compareSemver(a: string, b: string): number;
/** True when `current` is strictly older than `latest`. */
export declare function isOutdated(current: string, latest: string): boolean;
export declare function readUpdateCache(): UpdateCache | undefined;
export declare function writeUpdateCache(cache: UpdateCache): void;
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