Does it support external debugging tools?

Absolutely. It provides configuration guidance for Node Inspector, Chrome DevTools, VS Code Debugger (launch.json), and the Morgan logging library.

What is the recommended middleware for request logging?

The skill recommends Morgan for HTTP request logging and provides a custom diagnostic middleware template for capturing deep request/response metadata.

How does this skill help with 404 errors in Express?

It identifies common routing pitfalls, such as incorrect middleware ordering, catch-all handlers placed too early, or missing leading slashes, and provides the exact corrective code patterns.

How do I diagnose a memory leak using this skill?

The skill guides you through using --inspect and --expose-gc flags, taking heap snapshots in Chrome DevTools, and implementing bounded caches to prevent memory exhaustion.

Can it help with unhandled promise rejections?

Yes, it includes best practices for wrapping async handlers with try/catch blocks and setting up global error handlers to prevent application crashes.

Express.js Debugging & Diagnostics

Name: Express.js Debugging & Diagnostics
Author: SnakeO

bySnakeO

0•

API Development

Debugs and optimizes Express.js applications using systematic diagnostic techniques and industry-standard troubleshooting patterns.

This skill empowers developers to resolve complex Express.js and Node.js issues through a structured four-phase debugging methodology. It provides specialized guidance on fixing common pitfalls such as middleware execution hangs, CORS configuration errors, asynchronous error handling, and memory leaks. By integrating tools like the Node.js Inspector, Chrome DevTools, Morgan logging, and the DEBUG environment variable, it helps developers identify root causes faster and implement robust patterns for production-ready backend services.

Key Features

01Four-phase systematic debugging methodology for rapid issue resolution

02Comprehensive guides for fixing CORS, preflight, and async error handling

030 GitHub stars

04Diagnostic patterns for middleware execution, routing, and 404 errors

05Pre-configured templates for diagnostic middleware and VS Code debugging

06Memory leak detection using heap snapshots and LRU cache patterns

Use Cases

01Identifying and fixing memory leaks in long-running Node.js applications

02Optimizing production logging and error monitoring for Express.js servers

03Troubleshooting silent failures or hanging requests in complex middleware chains

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add snakeo/claude-debug-and-refactor-skills-plugin debug-express

For use in Claude.ai and ChatGPT

Download Skill