# Review by Linus Torvalds (Round 2)

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## Review: Linus Torvalds — Homebrew Global Installation & VM-Ready Deployment

**400 tests pass, 0 fail. 20 files changed, +2203/-22 lines across 8 commits.**

### Summary

The code is correct. No cleverness, no premature abstractions — just straightforward path checks, string matching, and shell scripts that do what they say. All 7 functional requirements from the PRD are implemented and tested.

### Key Findings (all non-blocking)

1. **`deploy/provision.sh`**: API key prompts use `read -r` without `-s` — secrets echo to terminal. Use `read -rs`.
2. **`tests/test_e2e_validation.py`**: `_command_exists()` calls `which` twice, first result discarded. Copy-paste bug — harmless but sloppy.
3. **`scripts/generate-homebrew-formula.sh`**: The sed fallback silently swallows errors. Add a comment noting GNU sed is assumed (only runs in CI on Ubuntu, so fine in practice).
4. **`release.yml`**: PAT embedded in git clone URL. Works, but a credential helper would be more defensive.

### What's good

- `detect_install_method()` is 15 lines of simple string matching. No factory patterns, no registry. Just check the path and return.
- `is_git_repo()` is 6 lines. Walks parents, handles submodules. Clean.
- Shell scripts use `set -euo pipefail`, validate inputs, have cleanup traps.
- `pipx install --force` for idempotency, signed apt repo instead of `curl | bash`, concurrency groups with rebase — all the right operational calls.
- 233-line formula generation script is a Rube Goldberg machine, but Homebrew demands it. The complexity is contained and well-guarded.

VERDICT: **approve**

Full review saved to `cOS_reviews/reviews/linus_torvalds/20260330_182656_round1_add_brew_installation_we_should_be_able_to_have.md`.