Playground

Half-finished things, built because they were interesting rather than because anyone asked for them.

Nothing here is part of the curriculum. These are not in the resource library, they carry no learning path, and they are not maintained to the same standard as the rest of the site. Some of them will quietly stop working.

Generator

Cheat Sheet Forge

Build a printable reference for Claude Code, Codex, Cursor, Antigravity, git or vi. Choose which sections you want and how deep to go, pick one of four looks — cyberpunk, terminal phosphor, blueprint or plain paper — and print it. Every command is checked against the tool's own documentation or its installed binary.

Open the forge →

Looking for the real material? The Resources Library has the interactive tools, and Learning Paths puts them in order.