What architectural patterns does it use?

It primarily follows the Controller-Service-Repository pattern to ensure separation of concerns and maintainability in medium-to-large Express applications.

Can it help with 'callback hell'?

Absolutely. It specializes in transforming deeply nested callbacks into modern async/await patterns with early returns and guard clauses.

Does it handle security middleware?

Yes, it implements best practices for authentication, authorization, and validation middleware composition using the Chain of Responsibility pattern.

Does this skill support TypeScript conversion?

Yes, it provides patterns and guidance for integrating TypeScript and defining types for Express requests, services, and repositories.

Express Refactor & Architecture

Name: Express Refactor & Architecture
Author: SnakeO

bySnakeO

0•

API Development

Refactors Express.js and Node.js codebases to improve maintainability, implement modern design patterns, and eliminate technical debt.

This skill transforms legacy Express.js code into production-grade, maintainable applications by applying modern JavaScript and TypeScript patterns. It automates the transition from callback-heavy logic to async/await, reorganizes bloated route handlers into a clean Controller-Service-Repository architecture, and implements robust error handling. Whether you are upgrading a CommonJS project to ESM, integrating Zod for validation, or resolving common anti-patterns like blocking the event loop, this skill provides the domain-specific guidance needed to write exemplary Node.js code.

Key Features

01Modern Syntax Transition: Converts legacy CommonJS and callback-based code to modern ESM modules and async/await.

02Middleware Optimization: Composes reusable middleware chains for authentication, authorization, and request validation.

03Robust Error Handling: Establishes centralized error management with custom error classes and automated catch blocks.

04Architecture Migration: Implements Controller-Service-Repository patterns to decouple business logic from HTTP handling.

05Validation & Type Safety: Integrates Zod schema validation and TypeScript definitions for production-ready data integrity.

060 GitHub stars

Use Cases

01Modernizing a legacy Express.js application from CommonJS to ESM and async/await syntax.

02Implementing standardized error handling and request validation across an existing API.

03Refactoring monolithic, 'fat' route handlers into a scalable, layered architecture.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

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

For use in Claude.ai and ChatGPT

Download Skill