Autoinstall user-data now disables cloud-init in multiple stages (late-commands + runcmd + systemd masks) to prevent post-install hangs. Also disables networkd-wait-online for air-gapped networks. build-usb.sh switched from in-place ISO patching to full extract and rebuild with xorriso mkisofs for reliable UEFI boot. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>