Clean Code Skill for Node.js/TypeScript

Overview

Clean code principles adapted for TypeScript-first, functional development.

DRY - Don't Repeat Yourself

Principle

Every piece of knowledge should have a single, unambiguous representation.

Violations

// Bad: Duplicated validation logic
const validateUserEmail = (email: string) => /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
const isValidEmail = (email: string) => /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);