AI Agent Skills

Guided, hands-on course teaching architects how to use Codex or Claude Code — six short modules, each built around an exercise on a bundled sandbox project (a fictional…

Learning Vim and Vimscript doesn't have to be hard. This is the guide that you're looking for 📖

Learn Godot's GDScript programming language from zero, right in your browser, for free.

freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

FCC China open source codebase and curriculum. Learn to code and help nonprofits.

Tower defense game that teaches cloud architecture. Build infrastructure, survive traffic, learn scaling.