## What does this change do?

<!-- One or two sentences. Link related issues, e.g. "Fixes #123". -->

## Checklist

- [ ] Builds cleanly without error
- [ ] Boots in QEMU and shows the expected output
- [ ] No generated artifacts committed (`*.o`, `*.bin`, `*.iso`, `build/` etc)
- [ ] Documentation updated if behavior changed
- [ ] AI policy respected: code is human-authored (or fully understood) see [CONTRIBUTING.md](CONTRIBUTING.md)