One concept per lesson. No fluff.

Level up your
code quality

Micro-lessons on clean code, design patterns, and clean architecture — with examples in Python and TypeScript.

Pick your language. One micro-lesson at a time — 5 to 12 minutes each.

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Clean Code

Names, functions, side effects — write code humans can read.

5 micro-lessons · 5–7 min each

Design Patterns

Reusable solutions to the problems you keep encountering.

5 micro-lessons · 8–10 min each

Clean Architecture

Structure systems so business logic doesn't depend on frameworks.

4 micro-lessons · 8–12 min each

Object Calisthenics

Nine rules that force truly object-oriented, maintainable code.

5 micro-lessons · 6–8 min each

AI writes code. You still need to understand it.

Tools like Claude, Copilot, and ChatGPT generate functional code every day — but functional isn't the same as maintainable. In a large codebase, AI-generated code that skips best practices compounds fast. Learning clean code, design patterns, and architecture gives you the vocabulary to guide AI to better output, spot its shortcuts, and refactor with confidence — manually or with AI assistance.

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Complete lessons to earn XP and track your progress

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Level up your code quality