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Code Reviewing

A systematic code review skill covering quality, security, performance, and maintainability.

Security & ReviewBeginner★ 1,059⑂ 374AI score 6/10Last updated: Jul 23, 2026

What it does

When you ask for feedback on code, Claude takes on a reviewer role and walks a four-part checklist: code quality, security, performance, and maintainability. Security coverage includes hardcoded secrets, SQL injection, XSS, missing input validation, and auth checks. Findings are graded Critical / Major / Minor and rendered in a fixed Markdown template with strengths, prioritized recommendations, and a final verdict (Approved / Needs Changes / Request Significant Changes).

Only read-only tools (Read, Grep, Glob) are allowed, so the skill inspects code without editing it.

Who it's for

  • Developers who want a self-review pass before opening a PR
  • Small teams or solo devs without a dedicated reviewer
  • Tech leads standardizing review comment format
  • Juniors who tend to skip security checks

Examples

  1. PR self-review — "Review the src/auth changes I just made" → flags a missing authorization check as Critical with line numbers and a suggested fix.
  2. Security pass — "Any vulnerabilities in this API handler?" → catches string-concatenated SQL and missing input validation.
  3. Legacy cleanup — "Assess legacy/report.py for maintainability" → marks duplicated logic and overly long functions as Major and suggests a refactor order.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/huangjia2019/claude-code-engineering/HEAD/04-Skills/projects/00-basic-skill/.claude/skills/code-reviewing/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the 04-Skills/projects/00-basic-skill/.claude/skills/code-reviewing folder from the GitHub repo huangjia2019/claude-code-engineering into my ~/.claude/skills/code-reviewing/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/huangjia2019/claude-code-engineering.git && mkdir -p ~/.claude/skills && cp -r claude-code-engineering/04-Skills/projects/00-basic-skill/.claude/skills/code-reviewing ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open your terminal.
  2. Clone the repo: git clone https://github.com/huangjia2019/claude-code-engineering.git
  3. Create the skills directory: mkdir -p ~/.claude/skills
  4. Copy the skill: cp -r claude-code-engineering/04-Skills/projects/00-basic-skill/.claude/skills/code-reviewing ~/.claude/skills/
  5. Verify that ~/.claude/skills/code-reviewing/SKILL.md exists.
  6. Restart Claude Code and try "review this file" — the skill should trigger automatically.
  7. For project-scoped use, copy it into .claude/skills/ at your project root instead.
View source on GitHub ↗