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Agent skill

Code Review

by brevdev in brevdev/workshop-build-an-agent

Systematic approach to reviewing code for quality and correctness

Apache-2.0Auto-check passedDevelopment

Install Code Review

skills CLI
$ npx skills add brevdev/workshop-build-an-agent --skill code-review -a claude-code

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

GitHub CLI
$ gh skill install brevdev/workshop-build-an-agent code-review --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/brevdev/workshop-build-an-agent.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/code-review .claude/skills/code-review && 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
code-review
GitHub stars
143
Token cost
~304 tokens
SKILL.md length
108 words
Files
1
Skills in repo
11
Repo updated
First seen
Licence
Apache-2.0

At a glance

Systematic approach to reviewing code for quality and correctness

  • Works in 5 steps: Correctness → Security → Performance → …
  • Tasks that involve Code review
  • SKILL.md covers Review Checklist, Feedback Format and Tone Guidelines
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Code Review is an agent skill from brevdev/workshop-build-an-agent. Systematic approach to reviewing code for quality and correctness

Its SKILL.md is about 300 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Code review. The licence is Apache-2.0.

When your agent uses it

  • Tasks that involve Code review

Example prompts

  • “/code-review”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. Correctness
  2. Security
  3. Performance
  4. Readability
  5. Maintainability

What it can do on your machine

Read from SKILL.md and the folder at commit b5689a7. 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

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    No URLs in SKILL.md.

    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

Code Review loads about 304 tokens when it runs. Until then it costs about 19 tokens; SKILL.md has 108 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~19
When it runs · the whole SKILL.md, loaded when a task matches
~304

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

The full file from brevdev/workshop-build-an-agent at commit b5689a7, republished under its Apache-2.0 licence (© brevdev). 108 words, ~304 tokens.

Download SKILL.mdSave it as .claude/skills/code-review/SKILL.md (or your agent's skills folder).
name
code-review
description
Systematic approach to reviewing code for quality and correctness

Code Review Skill

You are now operating as a code reviewer. Follow this systematic approach.

Review Checklist

1. Correctness
  • Does the code do what it's supposed to do?
  • Are edge cases handled?
  • Are there any obvious bugs?
2. Security
  • Input validation present?
  • No hardcoded secrets?
  • Proper error handling?
3. Performance
  • Any unnecessary loops or operations?
  • Efficient data structures used?
  • Database queries optimized?
4. Readability
  • Clear variable/function names?
  • Comments where needed?
  • Consistent formatting?
5. Maintainability
  • DRY principle followed?
  • Single responsibility?
  • Easy to test?

Feedback Format

Structure your review as:

## Summary
[One sentence overall assessment]

## What's Good
- [Positive point 1]
- [Positive point 2]

## Suggestions
1. [Issue]: [Specific recommendation]
2. [Issue]: [Specific recommendation]

## Priority
[High/Medium/Low] - [Reason]

Tone Guidelines

  • Be constructive, not critical
  • Explain the "why" behind suggestions
  • Acknowledge good practices
  • Ask questions instead of demanding changes

© brevdev, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/code-review of brevdev/workshop-build-an-agent.

Open the folder on GitHubat commit b5689a7

Compare with similar skills

Code Review 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.

Code Review compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Code Review this skillbrevdev/workshop-build-an-agent143—~304Automated safety check: PassApache-2.0
PR Babysitteropeninterpreter/openinterpreter69k3 repos~4.2kAutomated safety check: PassApache-2.0
Code Review ChecklistshareAI-lab/learn-claude-code78k5 repos~1.1kAutomated safety check: PassMIT
Backend Code Reviewlangflow-ai/langflow156k—~3.5kAutomated safety check: NotesMIT
Understand Diff AnalysisEgonex-AI/Understand-Anything85k1 repos~1.4kAutomated safety check: PassMIT
Mole Bug Patternstw93/Mole69k—~2kAutomated safety check: PassGPL-3.0

Similar skills

  • PR Babysitter

    openinterpreter/openinterpreter

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    69k GitHub starsUsed in 3 repos~4.2k tokens
    DevelopmentAuto-check passed

  • 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
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  • Backend Code Review

    langflow-ai/langflow

    Review backend code for quality, security, maintainability, and best practices based on established checklist rules.

    156k GitHub stars~3.5k tokensUpdated today
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  • Understand Diff Analysis

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    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
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  • Mole Bug Patterns

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    69k GitHub stars~2k tokensUpdated today
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  • Backend Code Review

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Categories

Questions about Code Review

What does Code Review do?

Systematic approach to reviewing code for quality and correctness. Code Review is an agent skill from brevdev/workshop-build-an-agent.

When should I use Code Review?

Code Review fits situations like: tasks that involve Code review.

How do I install Code Review in Claude Code?

Run `npx skills add brevdev/workshop-build-an-agent --skill code-review -a claude-code`. Or copy the skill folder (skills/code-review in brevdev/workshop-build-an-agent) into .claude/skills/code-review in your project. Claude Code loads it when a task matches its description.

How do I install Code Review in Codex?

Run `npx skills add brevdev/workshop-build-an-agent --skill code-review -a codex`. Or copy the skill folder (skills/code-review in brevdev/workshop-build-an-agent) into .agents/skills/code-review in your project. Codex loads it when a task matches its description.

Can I use Code Review 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 brevdev/workshop-build-an-agent --skill code-review -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/code-review, .gemini/skills/code-review, .github/skills/code-review and .opencode/skills/code-review in your project.

What does Code Review need to run?

SKILL.md names no scripts, command-line tools or credentials: Code Review is instructions for the agent only.

Does Code Review access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Code Review 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 Code Review use?

Code Review is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Code Review use?

About 304 tokens (SKILL.md is roughly 1.2k 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 Code Review?

Skills that share tags, products or a category with Code Review: PR Babysitter (openinterpreter/openinterpreter, 69k stars), Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Backend Code Review (langflow-ai/langflow, 156k stars) and Understand Diff Analysis (Egonex-AI/Understand-Anything, 85k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Code Review?

brevdev (a GitHub organization) maintains it in brevdev/workshop-build-an-agent, which has 143 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on October 6, 2026.

Source: brevdev/workshop-build-an-agent on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.