review-all — Claude Code skill: what it does, how to install
Two independent agents inspect the same committed diff and combine their findings into one report. Use it for a second review before a PR.
npx skills add gjkim42/kanon-repo --skill review-all -a claude-codeWhat review-all does
This skill sends two clean-context agents after the same base...HEAD range at the same time. One runs Codex’s codex review --base flow; the other checks the change against Google’s code-review guidance. Their findings are then combined and ordered by how strongly the reviewers agree.
The workflow only reviews code. It does not apply patches, use --fix or --comment, or post findings to GitHub. Its target is the current branch’s committed diff, so work that has not been committed is outside the review.
Codex login is a prerequisite for the Codex review path: codex login status must show an authenticated account. The skill is listed for Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, and OpenCode.
What it helps with
- cross-check a branch diff with two reviewers
- spot issues before opening a PR
- compare independent code-review findings
- review committed changes without editing files
Example prompts for the agent
- Run
review-allon the committed changes in this branch. - Give me a second-opinion review of the branch diff before the PR.
- Review the changes with both agents and do not modify any files.
How to install review-all
1Skills CLI (Vercel)
npx skills add gjkim42/kanon-repo --skill review-all -a claude-code2Manually: put the files in place
~/.claude/skills/review-all/SKILL.mdCopy the whole skill folder; for one project use .claude/skills/review-all/
1Skills CLI (Vercel)
npx skills add gjkim42/kanon-repo --skill review-all -a codex2Manually: put the files in place
.agents/skills/review-all/SKILL.mdFor all projects use ~/.agents/skills/
1Skills CLI (Vercel)
npx skills add gjkim42/kanon-repo --skill review-all -a cursor2Manually: put the files in place
.cursor/skills/review-all/SKILL.mdCursor also reads .agents/skills/ and .claude/skills/
1GitHub CLI
gh skill install gjkim42/kanon-repo review-all2Manually: put the files in place
.github/skills/review-all/SKILL.md1Skills CLI (Vercel)
npx skills add gjkim42/kanon-repo --skill review-all -a gemini-cli2Platform CLI
gemini skills install https://github.com/gjkim42/kanon-repo --path skills/review-allManually: put the files in place
.devin/skills/review-all/SKILL.mdThe legacy .windsurf/skills/ path still works
Skills CLI (Vercel)
npx skills add gjkim42/kanon-repo --skill review-all -a opencodeClaude.ai
Zip the folder and upload it in Settings → Capabilities → Skills
Step by step, with commands for each platform: How to install skills in Claude Code: five ways
Questions about review-all
How do I install review-all in Claude Code?
Run npx skills add gjkim42/kanon-repo --skill review-all -a claude-code, then use ~/.claude/skills/review-all/SKILL.md.
What does review-all do?
It sends two independent reviewers over one committed diff: one uses Codex and the other follows Google’s review guidance. Their findings are merged into a report that highlights agreement.
Does review-all inspect uncommitted work?
No. It reviews the branch range base...HEAD, so the target is committed changes.
