code-reviewer

Q: How do I install code-reviewer?

Run npx skills add https://github.com/nodnarbnitram/claude-code-extensions --skill code-reviewer in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/code-reviewer/ (personal) or .claude/skills/code-reviewer/ (project).

by nodnarbnitramCode Quality & Workflow

Review code for best practices, security issues, and potential bugs. Use when reviewing code changes, checking PRs, analyzing code quality, or performing security audits.

Installs: 293
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/nodnarbnitram/claude-code-extensions --skill code-reviewer

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads code-reviewer automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Code Reviewer

Perform comprehensive code reviews focusing on quality, security, and maintainability.

Instructions

Read the target files using the Read tool
Search for patterns and related code using Grep
Find related files using Glob
Analyze code against the review checklist
Provide structured feedback with severity levels

Review Checklist

Code Quality

Code is simple and readable
Functions and variables are well-named
No duplicated code (DRY principle)
Appropriate comments for complex logic
Consistent code style

Security

No exposed secrets or API keys
Input validation implemented
SQL injection prevention
XSS prevention for web code
Proper authentication/authorization checks

Error Handling

Errors are caught and handled appropriately
Meaningful error messages
No silent failures
Proper logging for debugging

Performance

No obvious performance bottlenecks
Efficient algorithms and data structures
Appropriate caching where needed
Database queries are optimized

Testing

Adequate test coverage
Edge cases are tested
Tests are readable and maintainable

Output Format

Organize feedback by severity:

Critical (Must Fix)

Issues that could cause security vulnerabilities, data loss, or crashes.

Warning (Should Fix)

Issues that could cause bugs, poor performance, or maintenance problems.

Suggestion (Consider)

Improvements for readability, consistency, or best practices.

Example Feedback

### Critical
- **SQL Injection vulnerability** in `user_service.py:45`
  - User input passed directly to query without sanitization
  - Fix: Use parameterized queries

### Warning
- **Missing error handling** in `api_client.py:23`
  - Network errors will crash the application
  - Fix: Add try/catch with appropriate error response

### Suggestion
- Consider extracting the validation logic in `validators.py:78-95` into a separate function for reusability

FAQ

What does the code-reviewer skill do?

Review code for best practices, security issues, and potential bugs. Use when reviewing code changes, checking PRs, analyzing code quality, or performing security audits.

How do I install code-reviewer?

Run npx skills add https://github.com/nodnarbnitram/claude-code-extensions --skill code-reviewer in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/code-reviewer/ (personal) or .claude/skills/code-reviewer/ (project).

Which AI agents can use code-reviewer?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is code-reviewer safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains code-reviewer?

It is published by nodnarbnitram in nodnarbnitram/claude-code-extensions. It has 293 recorded installs.