Thermo-nuclear code quality review

This skill audits a branch, PR, diff, or changed files with a high bar for maintainability. Its job is to find structural regressions and missed simplifications, not cosmetic nits.

Host protocol

1. Identify the review target. Prefer the current branch against its base. If no base is obvious, inspect git remotes and branch history before choosing.
2. In Codex, use native Codex subagents when available for independent review coverage. Keep workers read-only.
3. In Claude Code, usually delegate the review to Codex CLI unless the user explicitly asks to keep the review inside Claude. Use scripts/spawn-codex-reviewer.sh from this skill.
4. Use codex review --uncommitted, codex review --base <branch>, or a read-only codex exec worker when that fits the target better.
5. Inspect the diff yourself after any worker returns. Worker output is evidence, not the final answer.

Claude Code default: