This series collects hard-won lessons about software design into short, memorable proverbs. Each article explores a fundamental truth about building maintainable systems, backed by practical examples and real-world applications.
These aren’t abstract theories—they’re battle-tested principles that will change how you think about code.
Change is the enemy of software. Win the war by isolating what changes behind abstractions—the true meaning of Single Responsibility.
Ship new features without touching a single line of existing code—composition beats modification every time.
Small leaks in your abstractions can flood your entire codebase. Design interfaces that hide implementation details, or pay the price later.
Fat interfaces lie about their capabilities—split them into focused contracts that use types, not boolean checks.
Interfaces are like electrical outlets - they remove complexity and make components easily swappable. Learn how to use interfaces to decouple your software components.