The welcome now carries a personId; it lands in the instance_id setting and rides on every hello and HTTP report from then on. The master keys the person by that uuid, so changing instance_name moves our history to the new name instead of starting a stranger. Read-only in Settings on purpose — editing it by hand would detach this machine from its person. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>