add-model guarded; spaces gate 0 fatal, all six ruled spaces present;
apt-mirror key VERIFIED against the live client (not guessed) and set to
http://10.12.8.4/ubuntu, asserted on content via dists/jammy/Release.

The mirror gate was RED on content -- one package, a transient upstream 500 on
linux-tools-intel-iotg. debmirror's all-or-nothing exit failed the whole run.
Re-sync took 15s and the gate is green. This is the assert-on-content fix
working as designed.

Owned: my first wait-loop polled systemctl immediately after an async start and
reported the sync done while the status file said RUNNING. Re-polled on content.

Recorded: D-138 moved the client to the rack but the rack has no repo clone --
same class as queued F1.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HvCyrwvYTTcDYnRErfMsNf