Address bot review findings:
- Indent the three 'Fast path' comment blocks to match surrounding code
- Reproduce script header no longer claims the fast path catches brew
paths with a minimal PATH — the hardcoded fallbacks do that; the fast
path only sees binaries already in the inherited PATH
Resolve conflicts after 914 upstream commits:
- CHANGELOG.md: keep brew opencode fix entry in Unreleased
- .gitignore: keep superpowers docs exclusion, take upstream additions
Drop /usr/local/ TOOLCHAIN_SEGMENTS addition — /usr/local/bin is part
of the default macOS PATH, so treating it as user-configured would skip
the login-shell fallback that this fix relies on. Upstream tests
(pass 1602) confirm minimal system PATH must not look user-configured.
Mayuresh Kadu