Auto Updater

Keeps your OpenClaw agent current by running a nightly cron job at 4 AM that stops the gateway, pulls updates, and restarts everything. The clever bit is using an external shell script instead of internal commands, which matters because the agent can't execute anything while it's restarting itself. You just say "set up auto-updater" and it handles the script placement and cron configuration. You can change the schedule or trigger manual updates on demand. Honestly, this is one of those set-it-and-forget-it utilities that saves you from remembering to check for updates, though you'll want to keep an eye on that log file in case something breaks during a restart.