Agent skill

Review Code

by serpro69 in serpro69/claude-toolbox

Code review of current git changes with an expert senior-engineer lens.

Custom licenceAuto-check passedDevelopment

Install Review Code

skills CLI
$ npx skills add serpro69/claude-toolbox --skill review-code -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install serpro69/claude-toolbox review-code --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/serpro69/claude-toolbox.git skills-src && mkdir -p .claude/skills && cp -r skills-src/kodex-plugin/skills/review-code .claude/skills/review-code && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
review-code
GitHub stars
151
Token cost
~1.3k tokens
SKILL.md length
586 words
Files
35
Skills in repo
12
Repo updated
First seen
Licence
Custom licence

At a glance

Code review of current git changes with an expert senior-engineer lens.

  • Works in 10 steps: Scope — git diff --stat for filenames… → Detect active profiles — delegate to… → Load profile review indexes — for each… → …
  • Performing code reviews
  • SKILL.md covers Overview, Conventions, Required Outputs and Review Modes, plus 3 more sections
  • Runs Shell and Go scripts from its folder; calls git

What it does

Review Code is an agent skill from serpro69/claude-toolbox. Code review of current git changes with an expert senior-engineer lens. Detects SOLID violations, security risks, and proposes actionable improvements. Use when performing code reviews.

Its SKILL.md is about 1.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 43 other files (for example `evals/_harness/HARNESS.md`, `evals/_harness/setup.sh` and `evals/go-regression/eval.json`).

It sits in Development, covering Code review. It works with Git. The repository describes itself as: Minimal by design, explicitly multi-lang, production-ready and battle-tested collection of configs and plugins for your Claude Code agentic development workflows: mcp, configs…

When your agent uses it

  • Performing code reviews
  • Tasks that involve Code review

Example prompts

  • “/review-code”

Requirements

  • A Bash shell

Workflow steps

10 steps, taken from the first numbered list in SKILL.md.

  1. Scope — git diff --stat for filenames only (no content reads)
  2. Detect active profiles — delegate to shared-profile-detection.md; produce the list of (profile, checklist) records
  3. Load profile review indexes — for each active profile, resolve its review-code/index.md; collect always-load + filename-evaluable…
  4. Read resolved checklists — read every (profile, checklist) file collected in Step 3 into context
  5. Read the diff and re-read changed files — now, with methodology loaded; also run capy_search for kk:review-findings and kk:lang-idioms
  6. Resolve content-evaluable conditional entries — for each deferred entry from Step 3, evaluate the predicate against the file content read…
  7. Apply checklists — iterate the full resolved list (Steps 3 + 6); emit findings grouped by (profile, checklist)
  8. Self-check and confidence assessment
  9. Index findings — capy index systemic P0/P1 patterns as kk:review-findings
  10. Present results with next steps

What it can do on your machine

Read from SKILL.md and the folder at commit c2d28c9. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Ships script files (Shell and Go, from the files we listed), which the agent can run.

    Shell commands in SKILL.md call:

    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Review Code loads about 1.3k tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 586 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~1.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 586 words (~1,328 tokens).

“Perform a structured review of the current git changes with focus on SOLID, architecture, removal candidates, and security risks. Default to review-only output unless the user asks to implement changes.”

— opening of SKILL.md by serpro69, Custom licence
name
review-code

Read the full SKILL.md on GitHub

Files

SKILL.md and 34 other files in kodex-plugin/skills/review-code of serpro69/claude-toolbox.

  • SKILL.md
  • evals/_harness/HARNESS.md
  • evals/_harness/setup.sh
  • evals/go-regression/eval.json
  • evals/go-regression/test-files/main.go
  • evals/k8s-helm-chart/eval.json
  • evals/k8s-helm-chart/test-files/Chart.yaml
  • evals/k8s-helm-chart/test-files/templates/_helpers.tpl
  • evals/k8s-helm-chart/test-files/templates/deployment.yaml
  • evals/k8s-helm-chart/test-files/values.yaml
  • evals/k8s-kustomize-only/eval.json
  • evals/k8s-kustomize-only/test-files/kustomization.yaml
  • … and 23 more

Open the folder on GitHubat commit c2d28c9

Compare with similar skills

Review Code next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Review Code compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Review Code this skillserpro69/claude-toolbox151—~1.3kAutomated safety check: PassCustom licence
Code Review ChecklistshareAI-lab/learn-claude-code78k5 repos~1.1kAutomated safety check: PassMIT
Understand Diff AnalysisEgonex-AI/Understand-Anything85k1 repos~1.4kAutomated safety check: PassMIT
Open Code Review CLIalibaba/open-code-review44k—~3.1kAutomated safety check: PassApache-2.0
Open Code Review Delegatealibaba/open-code-review44k—~2kAutomated safety check: PassApache-2.0
PR Review State Fetchprisma/orm48k—~767Automated safety check: PassApache-2.0

Similar skills

  • Code Review Checklist

    shareAI-lab/learn-claude-code

    Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.

    78k GitHub starsUsed in 5 repos~1.1k tokens
    DevelopmentAuto-check passed
  • Understand Diff Analysis

    Egonex-AI/Understand-Anything

    Reads your git changes or a pull request against a prebuilt knowledge graph of the project to explain what changed, which components are affected and what is risky.

    85k GitHub starsUsed in 1 repo~1.4k tokens
    DevelopmentAuto-check passed
  • Open Code Review CLI

    alibaba/open-code-review

    Runs the ocr command-line tool to review Git changes, a commit or a branch comparison with an AI model, returning line-level comments and optionally applying fixes.

    44k GitHub stars~3.1k tokensUpdated 2 days ago
    DevelopmentAuto-check passed
  • Open Code Review Delegate

    alibaba/open-code-review

    Has the host agent do the code review itself while the ocr CLI handles file selection and rule lookup, covering workspace changes, branch ranges or single commits.

    44k GitHub stars~2k tokensUpdated 2 days ago
    DevelopmentAuto-check passed
  • Official

    Fetches a pull request's canonical review state as JSON, validates it, and renders markdown, a text summary and triage target files from it using bundled scripts.

    48k GitHub stars~767 tokensUpdated yesterday
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  • Knowledge Graph PR Review

    tirth8205/code-review-graph

    Reviews a pull request or branch diff with a code knowledge graph and produces a structured review that includes blast-radius analysis.

    32k GitHub stars~452 tokensUpdated yesterday
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  • Clarify Docs

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Works with

Categories

Questions about Review Code

What does Review Code do?

Code review of current git changes with an expert senior-engineer lens. Review Code is an agent skill from serpro69/claude-toolbox. Code review of current git changes with an expert senior-engineer lens.

When should I use Review Code?

Review Code fits situations like: performing code reviews; tasks that involve Code review.

How do I install Review Code in Claude Code?

Run `npx skills add serpro69/claude-toolbox --skill review-code -a claude-code`. Or copy the skill folder (kodex-plugin/skills/review-code in serpro69/claude-toolbox) into .claude/skills/review-code in your project. Claude Code loads it when a task matches its description.

How do I install Review Code in Codex?

Run `npx skills add serpro69/claude-toolbox --skill review-code -a codex`. Or copy the skill folder (kodex-plugin/skills/review-code in serpro69/claude-toolbox) into .agents/skills/review-code in your project. Codex loads it when a task matches its description.

Can I use Review Code in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add serpro69/claude-toolbox --skill review-code -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/review-code, .gemini/skills/review-code, .github/skills/review-code and .opencode/skills/review-code in your project.

What does Review Code need to run?

Going by SKILL.md and its folder, Review Code needs a shell and Go for the scripts in its folder and the command-line tools its instructions call (git). Our summary lists: A Bash shell.

Does Review Code access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Review Code safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Review Code use?

Review Code has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Review Code use?

About 1.3k tokens (SKILL.md is roughly 5.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Review Code?

Skills that share tags, products or a category with Review Code: Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Understand Diff Analysis (Egonex-AI/Understand-Anything, 85k stars), Open Code Review CLI (alibaba/open-code-review, 44k stars) and Open Code Review Delegate (alibaba/open-code-review, 44k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Review Code?

serpro69 (a GitHub user) maintains it in serpro69/claude-toolbox, which has 151 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 3, 2026.

Source: serpro69/claude-toolbox on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.