Review findings from codex and Copilot:
- A rig-supplied credentials file in OEM mode now contributes only its LUKS
passphrase: preserved users/root_enc_password fields would have created a
hidden provisioning account despite OEM promising no user until first boot.
- The factory snapshot is taken writable, scrubbed of deployment credentials
(staged authorized_keys, tailscale auth key and join unit, the dead OEM
LUKS key and its initramfs drop-ins), then set read-only — a reset years
later must not authorize the original deployment key or rejoin its tailnet.
- The missing-Node-tarball case is a hard install error on every install,
not just OEM: the stash is what lets a factory reset finalize offline.
- The configurator's OEM gate checks the runtime package for the service
unit as well as the setup binary.
- The test harness handles the deliberately skipped mode picker on blank
disks when the bundled runtime lacks OEM support.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
