- README.md: project intro, architecture overview, validation
  results, quickstart, repository layout, known limitations.
- xv6-vfs.diff: unified diff vs. init commit covering the entire
  VFS + HAL + ext2 + fat32 implementation (per contest
  submission requirement).
- .gitignore: keep USAGE.md, patches/, and local credentials out
  of the tree.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>