CI's new deploy job (tags only) sends the house HMAC webhook to CT 126; the listener runs /usr/lib/devdesk/devdesk-deploy, which waits for the version in the apt registry and upgrades devdesk with --force-confold. Running sessions are untouched. Hook setup is documented in docs/DEPLOY.md. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>