Agent skill

Code Review

by selmakcby in selmakcby/claude-agents-skills

Senior code review specialist. An agent skill from selmakcby/claude-agents-skills.

MITAuto-check passedDevelopment

Install Code Review

skills CLI

$ npx skills add selmakcby/claude-agents-skills --skill code-review -a claude-code

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

GitHub CLI

$ gh skill install selmakcby/claude-agents-skills 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/selmakcby/claude-agents-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/my-project-demo/.claude/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/

Paste into Claude Code

Install the "code-review" agent skill from https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review into .claude/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add selmakcby/claude-agents-skills --skill code-review -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install selmakcby/claude-agents-skills code-review --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/selmakcby/claude-agents-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/my-project-demo/.claude/skills/code-review .agents/skills/code-review && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "code-review" agent skill from https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review into .agents/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add selmakcby/claude-agents-skills --skill code-review -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install selmakcby/claude-agents-skills code-review --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/selmakcby/claude-agents-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/my-project-demo/.claude/skills/code-review .cursor/skills/code-review && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "code-review" agent skill from https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review into .cursor/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/selmakcby/claude-agents-skills.git --path my-project-demo/.claude/skills/code-review

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add selmakcby/claude-agents-skills --skill code-review -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install selmakcby/claude-agents-skills code-review --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/selmakcby/claude-agents-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/my-project-demo/.claude/skills/code-review .gemini/skills/code-review && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "code-review" agent skill from https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review into .gemini/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install selmakcby/claude-agents-skills code-review

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add selmakcby/claude-agents-skills --skill code-review -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/selmakcby/claude-agents-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/my-project-demo/.claude/skills/code-review .github/skills/code-review && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "code-review" agent skill from https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review into .github/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add selmakcby/claude-agents-skills --skill code-review -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install selmakcby/claude-agents-skills code-review --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/selmakcby/claude-agents-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/my-project-demo/.claude/skills/code-review .opencode/skills/code-review && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "code-review" agent skill from https://github.com/selmakcby/claude-agents-skills/tree/main/my-project-demo/.claude/skills/code-review into .opencode/skills/code-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-review", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: code-review
GitHub stars: 136
Token cost: ~746 tokens
SKILL.md length: 312 words
Files: 1
Skills in repo: 8
Repo updated: Apr 21, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Senior code review specialist. An agent skill from selmakcby/claude-agents-skills.

Works in 3 steps: CLAUDE.md compliance — does the code… → Bug detector — obvious bugs in the diff → History analyzer — git context to…
Tasks that involve Code review
SKILL.md covers When to trigger, Review approach, What to check and Severity levels, plus 2 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Code Review is an agent skill from selmakcby/claude-agents-skills. Senior code review specialist. Use PROACTIVELY after writing or modifying code. Reviews for quality, correctness, performance, and best practices. Assigns severity levels to findings (CRITICAL / HIGH / MEDIUM / LOW).

Its SKILL.md is about 750 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 repository describes itself as: Multi-Agent Claude Code setup — 4 uzman ajan (planner · ui-agent · builder · reviewer) + skills + Next.js demo projesi. YouTube Bölüm 1 video materyalleri. The licence is MIT.

When your agent uses it

Tasks that involve Code review

Example prompts

“/code-review”

Workflow steps

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

CLAUDE.md compliance — does the code follow project rules?
Bug detector — obvious bugs in the diff
History analyzer — git context to understand intent

What it can do on your machine

Read from SKILL.md and the folder at commit ddcfb0c. 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 (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- github.com
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 746 tokens when it runs. Until then it costs about 57 tokens; SKILL.md has 312 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~57
When it runs · the whole SKILL.md, loaded when a task matches: ~746

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 selmakcby/claude-agents-skills at commit ddcfb0c, republished under its MIT licence (© selmakcby). 312 words, ~746 tokens.

Download SKILL.mdSave it as .claude/skills/code-review/SKILL.md (or your agent's skills folder).

name: code-review
description: Senior code review specialist. Use PROACTIVELY after writing or modifying code. Reviews for quality, correctness, performance, and best practices. Assigns severity levels to findings (CRITICAL / HIGH / MEDIUM / LOW).

<!--
  Source: anthropics/claude-code (official)
  File:   https://github.com/anthropics/claude-code/blob/main/plugins/code-review/commands/code-review.md
  Also:   https://github.com/anthropics/claude-code/blob/main/plugins/code-review/README.md
  Used by: reviewer agent
-->

Code Review

When to trigger

Immediately after new or modified code
Before commit / PR
When user asks for /code-review

Review approach

Multi-agent review with confidence filtering:

CLAUDE.md compliance — does the code follow project rules?
Bug detector — obvious bugs in the diff
History analyzer — git context to understand intent

Each issue is scored 0–100. Findings below threshold (default 80) are filtered out.

What to check

Clarity

Names (variables, functions, files) — do they say what they do?
Structure — is it easy to scan?
Cognitive load — how much do you hold in your head to understand it?

Correctness

Edge cases: null, undefined, empty array, boundary values
Error paths: are they handled? Do they fail loudly or silently?
Async: await missing? Race conditions? Promise rejections caught?
Off-by-one errors in loops / slicing

Performance

N+1 queries (especially around ORM usage)
O(n²) algorithms on large collections
Unnecessary re-renders (React)
Missing memoization for expensive computations
Synchronous I/O in hot paths

Consistency

Matches project style guide (CLAUDE.md, rules/)
Immutable patterns used
Function size under 50 lines
Nesting 4 levels max

Tests

Is there a test for the new behavior?
Edge cases covered?
Mocks realistic (no "happy path only")?
Tests independent (no shared state)?

Dead code

Unused imports
Unreachable branches
TODO comments that should be done or deleted
Commented-out code

Severity levels

CRITICAL — do not commit. Breaks production, security hole, data loss risk.
HIGH — fix before next release. Real bug users will hit.
MEDIUM — fix when you're in the area. Code smell, minor inefficiency.
LOW — nice-to-have. Style preference, optional refactor.

Output format

markdown

## CRITICAL (must-fix)
- [`<file>:<line>`] <issue>
  - Why: <impact>
  - Fix: <specific suggestion>

## HIGH
- ...

## MEDIUM / LOW
- ...

## Summary
<N CRITICAL · N HIGH · N MEDIUM · N LOW>
<Verdict: PASS | FAIL>

Rules

Every finding has: severity, file + line, what's wrong, why it matters, suggested fix.
Don't just flag — propose a fix.
Don't be timid on CRITICAL. If it's critical, say so clearly.
If you see a pattern (same issue in multiple places), flag it once with a list.
Use --comment mode for PR review, default for local output.

Files

Just SKILL.md in my-project-demo/.claude/skills/code-review of selmakcby/claude-agents-skills.

Open the folder on GitHubat commit ddcfb0c

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
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Code Review this skillselmakcby/claude-agents-skills	136	—	~746	Automated safety check: Pass	MIT	5 mo ago
PR Babysitteropeninterpreter/openinterpreter	69k	3 repos	~4.2k	Automated safety check: Pass	Apache-2.0	yesterday
Code Review ChecklistshareAI-lab/learn-claude-code	78k	5 repos	~1.1k	Automated safety check: Pass	MIT	9 days ago
Backend Code Reviewlangflow-ai/langflow	156k	—	~3.5k	Automated safety check: Notes	MIT	today
Understand Diff AnalysisEgonex-AI/Understand-Anything	85k	1 repos	~1.4k	Automated safety check: Pass	MIT	2 days ago
Mole Bug Patternstw93/Mole	69k	—	~2k	Automated safety check: Pass	GPL-3.0	yesterday

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69k GitHub starsUsed in 3 repos~4.2k tokens
DevelopmentAuto-check passed
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Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
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156k GitHub stars~3.5k tokensUpdated today
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Mole Bug Patterns
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Questions about Code Review

What does Code Review do?

Senior code review specialist. An agent skill from selmakcby/claude-agents-skills. Code Review is an agent skill from selmakcby/claude-agents-skills. Senior code review specialist.

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 selmakcby/claude-agents-skills --skill code-review -a claude-code`. Or copy the skill folder (my-project-demo/.claude/skills/code-review in selmakcby/claude-agents-skills) 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 selmakcby/claude-agents-skills --skill code-review -a codex`. Or copy the skill folder (my-project-demo/.claude/skills/code-review in selmakcby/claude-agents-skills) 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 selmakcby/claude-agents-skills --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 names 1 domain. As links in the text: github.com. 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 MIT 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 746 tokens (SKILL.md is roughly 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 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?

selmakcby (a GitHub user) maintains it in selmakcby/claude-agents-skills, which has 136 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on April 21, 2026.

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

Install Code Review

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Code Review

When to trigger

Review approach

What to check

Clarity

Correctness

Performance

Consistency

Tests

Dead code

Severity levels

Output format

Rules

Files

Compare with similar skills

Similar skills

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Related

Questions about Code Review