VibeCoding-a-Website: Skill for Claude Code

Code Auditor

The code-auditor skill ensures that the JavaScript, HTML, and CSS running your website is correct, robust, and follows best practices. While the performance-optimizer focuses on speed and file size, the code-auditor focuses on correctness: Does your code run without errors? Do your API integrations actually work? Is there proper error handling in place? Are your dependencies secure?

This skill is your "web programmer" — the person who makes sure everything runs without breaking.

---

JavaScript Audit

Console Error Detection

Scans your browser console for JavaScript errors with zero-error tolerance in production. Checks:

• Uncaught errors and exceptions
• Unhandled promise rejections (async operations that fail silently)
• TypeError, ReferenceError, SyntaxError messages
• Deprecation warnings that could break in future browser updates
• Security warnings (mixed content, unsafe operations)

Why it matters: Users see broken functionality and get frustrated. Search engines penalize sites with errors.

API Call Failures

Tests all fetch() and XMLHttpRequest calls:

• Failed requests (4xx, 5xx responses)
• Network timeout issues
• Malformed request headers or bodies
• CORS errors when calling external APIs
• Missing or invalid API keys blocking requests

Why it matters: If your contact form can't submit to Resend, or your analytics don't load, visitors won't know — they'll just see a broken site.

Memory Leaks & Event Listeners

Identifies JavaScript that keeps eating memory:

• Event listeners never removed (onclick handlers that stack up)
• Old data stored in variables but never cleaned up
• DOM nodes kept in memory after being removed from the page
• Timer intervals/timeouts that never clear

Why it matters: Your site gets slower and slower the longer users stay on it. On mobile, it can crash.

Dead Code & Unused Variables

Finds code that's not being used:

• Functions defined but never called
• Variables assigned but never read
• Imports that don't get used
• Conditional branches that will never execute