The Most Ignored OOP Rule That Breaks Your Code Over Time: SRP Explained

Learn how applying the Single Responsibility Principle makes your code easier to test, maintain, and extend — with real-world examples and an AI-powered way to catch violations early.

One of the most common mistakes developers make — even experienced ones — is letting a single class do too much.

It starts innocently enough: you add a method here, a helper there, and suddenly your class is sending emails, writing to the database, and logging events all at once.