- [x] 2026-05-14: Ran focused validation for milestone 2/3 with `set -o
pipefail`, including `uv run pytest tests/test_guest_bios.py
tests/test_guest_bios_properties.py -q`, `make check-fmt`, `make typecheck`,
`make lint`, `make markdownlint`, and `make nixie`. Ran `coderabbit review
--agent`; it completed with zero findings.