Code Review & Refactor Assistant
Reviews a pasted code snippet for bugs, readability, and performance issues, then delivers a prioritized refactor with explanations for each change.
Code Review & Refactor Assistant is a free AI skill for code improvement. Reviews a pasted code snippet for bugs, readability, and performance issues, then delivers a prioritized refactor with explanations for each change. It works with Claude, ChatGPT, Cursor and is ready to use out of the box.
About this skill
Code Review & Refactor Assistant performs a structured review of any pasted code snippet: it flags actual bugs and edge-case failures, readability and naming issues, and performance or complexity concerns, then produces a refactored version with inline comments explaining what changed and why. It's built to behave like a thoughtful senior engineer doing a pull request review — specific, prioritized, and focused on real issues rather than generic style nitpicks.
What it does
Given a code snippet in any common language, the skill outputs a categorized review (bugs, readability, performance), followed by a refactored version of the code with explanatory comments on each meaningful change.
What is included
- Categorized review: bugs, readability, performance
- Severity/priority ranking per issue
- Fully refactored code with inline explanations
- Language-agnostic — works across common languages
- Pull-request-style review tone
How to use it
1. Download the SKILL.md file 2. Upload it to a new Claude conversation 3. Paste the code snippet you want reviewed 4. Receive a full review and refactored version
Examples
function getActiveUsers(users) {
let result = []
for (let i = 0; i < users.length; i++) {
if (users[i].active == true) {
result.push(users[i])
}
}
return result
}REVIEW:
BUGS: None functionally breaking, but == true is a loose equality risk if 'active' isn't strictly boolean (e.g. truthy string 'true'). Priority: Low
READABILITY: Manual for-loop with index access is less idiomatic than array methods; 'result' is a vague variable name. Priority: Medium
PERFORMANCE: No issues at typical scale; array methods below have equivalent performance for reasonable list sizes. Priority: N/A
REFACTORED CODE:
function getActiveUsers(users) {
// Use .filter for clearer intent and to avoid manual loop bookkeeping
return users.filter(user => user.active === true) // strict equality avoids truthy-value bugs
}
SUMMARY: Simplified from imperative loop to declarative filter, fixed loose equality, improved naming clarity via direct return.FAQ
What is this skill for?
How do I install it?
What languages does it support?
Will it rewrite my entire codebase?
How is this different from a linter?
Does it explain why it made each change?
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