Function canonicalVersionTag

src/upgrade/update-check.ts:127–131

(v: string)

 * the trailing text straight into every session's instructions.)
 */
export function canonicalVersionTag(v: string): string | null {
  const s = parseSemver(v);
  if (!s) return null;
  return `v${s.major}.${s.minor}.${s.patch}${s.pre ? `-${s.pre}` : ''}`;
}

/** One user-facing sentence; every surface (stderr, instructions, status) shows this. */
export function formatUpdateNotice(current: string, latest: string): string {