Automatic code quality and best practices analysis. Use proactively when files are modified, saved, or committed. Analyzes code style, patterns, potential bugs, and security basics. Triggers on file changes, git diff, code edits, quality mentions.
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Lightweight automatic code quality checks while you code.
Me (Skill): Fast, lightweight, real-time feedback @code-reviewer (Sub-Agent): Deep analysis with examples and strategy
// You write this code:
function getUser(id) {
return db.query(`SELECT * FROM users WHERE id = ${id}`);
}
// I immediately flag:
// 🚨 Line 2: SQL injection vulnerability
// 💡 Use parameterized queries
// You write:
function UserList({ users }) {
return users.map(user => <User data={user} />);
}
// I flag:
// ⚠️ Missing key prop in list rendering (line 2)
// 💡 Add key={user.id} to User component
# You write:
def process_data(data):
return data['user']['profile']['name']
# I flag:
# ⚠️ Potential KeyError - no safety checks (line 2)
# 💡 Use .get() or add try/except
🤖 code-reviewer skill:
[Severity] Issue description (file:line)
💡 Quick fix suggestion
📖 Reference: [link to learn more]
After I flag issues, invoke @code-reviewer sub-agent for:
Example:
Me: "⚠️ Potential N+1 query detected"
You: "@code-reviewer explain the N+1 issue and show optimal solution"
Sub-agent: [Provides comprehensive analysis with examples]
Works without sandboxing: ✅ Yes (default, recommended for learning) Works with sandboxing: ✅ Yes (no special configuration needed)
Want different checks or patterns?
Copy this skill:
cp -r ~/.claude/skills/development/code-reviewer ~/.claude/skills/development/my-code-reviewer
Edit SKILL.md:
description to adjust triggersRestart Claude Code:
claude --restart
See ../../TEMPLATES.md for customization guide.
// Before:
async function fetchUsers(ids) {
const users = [];
for (let id of ids) {
const user = await User.findById(id); // N+1 query!
users.push(user);
}
return users;
}
// I flag:
// ⚠️ N+1 query pattern detected (line 4)
// 💡 Use User.findByIds(ids) for batch loading
// After fix:
async function fetchUsers(ids) {
return await User.findByIds(ids);
}
// Before:
function UserCard({ user }) {
const [data, setData] = useState();
useEffect(() => {
fetch(`/api/users/${user.id}`)
.then(res => res.json())
.then(setData);
}, []); // Missing dependency!
return <div>{data?.name}</div>;
}
// I flag:
// ⚠️ useEffect dependency array incomplete (line 6)
// 💡 Add user.id to dependencies: [user.id]
// After fix:
useEffect(() => {
fetch(`/api/users/${user.id}`)
.then(res => res.json())
.then(setData);
}, [user.id]);
The /review command aggregates my findings with deep sub-agent analysis:
/review --scope staged --checks all
# Command workflow:
# 1. Collects my automatic findings
# 2. Invokes @code-reviewer sub-agent for deep analysis
# 3. Invokes @security-auditor sub-agent
# 4. Generates comprehensive report with priorities
This skill operates asynchronously and won't slow down your coding workflow.
Want to add language-specific patterns? See customization guide above.
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Auto-generate API documentation from code and comments. Use when API endpoints change, or user mentions API docs. Creates OpenAPI/Swagger specs from code. Triggers on API file changes, documentation requests, endpoint additions.
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Check dependencies for known vulnerabilities using npm audit, pip-audit, etc. Use when package.json or requirements.txt changes, or before deployments. Alerts on vulnerable dependencies. Triggers on dependency file changes, deployment prep, security mentions.
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Generate conventional commit messages automatically. Use when user runs git commit, stages changes, or asks for commit message help. Analyzes git diff to create clear, descriptive conventional commit messages. Triggers on git commit, staged changes, commit message requests.
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Keep README files current with project changes. Use when project structure changes, features added, or setup instructions modified. Suggests README updates based on code changes. Triggers on significant project changes, new features, dependency changes.
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Detect exposed secrets, API keys, credentials, and tokens in code. Use before commits, on file saves, or when security is mentioned. Prevents accidental secret exposure. Triggers on file changes, git commits, security checks, .env file modifications.
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Continuous security vulnerability scanning for OWASP Top 10, common vulnerabilities, and insecure patterns. Use when reviewing code, before deployments, or on file changes. Scans for SQL injection, XSS, secrets exposure, auth issues. Triggers on file changes, security mentions, deployment prep.
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