# Review by Linus Torvalds (Round 3)

## Review Complete — Linus Torvalds

**VERDICT: approve**

**FINDINGS:**
- [scripts/generate-homebrew-formula.sh]: `setuptools<78` pin will rot — when poet drops pkg_resources, this breaks. CI will catch it immediately. Contained risk.
- [scripts/generate-homebrew-formula.sh]: The GNU sed command is write-only code, but it works and only runs on Ubuntu CI runners.
- [deploy/provision.sh]: Node.js major version hardcoded to 20 — one-line update when Node 22 LTS lands.

**SYNTHESIS:**
I said in the PRD review that Homebrew formulas with deep Python dependency trees are a maintenance burden, and I still believe that. But the user asked for it, and this implementation automates away the worst of the pain — formula generation is fully automated in CI, resource blocks are regenerated on every release, and there's a failure notification if anything breaks. The code is straightforward throughout. The shell scripts have proper error handling without being over-engineered. The Python changes are minimal and surgical — `detect_install_method()` is three `if` statements checking string substrings, which is exactly the right amount of complexity. `is_git_repo()` walks parents looking for `.git`, handles both directories and files (submodules), done. The provisioning script does seven things in seven clearly-labeled steps, each one doing one job. The awk filter for poet output is three lines instead of a parser. The previous reviewers caught the security nits (silent secret input, credential helper for git auth) and they've been fixed. 402 tests pass. 20 files changed, all doing exactly what the PRD asked for, nothing more. Ship it.

Review saved to `cOS_reviews/reviews/linus_torvalds/20260330_182656_round2_add_brew_installation_we_should_be_able_to_have.md`.
