- 🛡️ fail a regional build whose profile lacks `skel`, instead of shipping an ISO that silently skips the advertised input defaults Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- ✅ guard cache isolation, trust failures, and installation ordering - 🛡️ keep global builds and existing user settings unchanged Amp-Thread-ID: T-01a0df38-0ea7-759b-bcff-29da223cc567