/**
 * What version npm would serve right now, or null if we could not ask.
 *
 * Deliberately quiet about failures: this runs on a path where being offline,
 * behind a proxy, or on a flaky connection is ordinary, and none of that is
 * worth an error. A missed check is not a problem; a server that refuses to
 * start because a version check failed would be.
 */
export declare function latestPublished(timeoutMs?: number): Promise<string | null>;
/** Numeric compare, so 0.9.10 sorts above 0.9.9. */
export declare function isNewer(candidate: string, current: string): boolean;
/**
 * Tell the user, on stderr, when they are running something old.
 *
 * Fire-and-forget from `main`: the server is already listening by the time
 * this resolves, so a slow registry delays nothing. stdout carries the MCP
 * protocol and must stay clean.
 */
export declare function noticeIfOutdated(current: string): void;
/**
 * `npx @stratta/mcp update`.
 *
 * npx caches a resolved package and reuses it, so `npx -y @stratta/mcp` can
 * keep launching a version that npm replaced weeks ago — the user has no way
 * to tell, and nothing tells them. This says which version is running, which
 * one is published, and clears the cache entry so the next launch fetches the
 * new one.
 */
export declare function runUpdate(current: string): Promise<void>;