foundations

Start here: what Claude actually is across its different surfaces, and how to pick a model.

core concepts

The ideas that separate "using Claude" from actually working with it as a tool.

extending and automating

Wiring Claude into tools it doesn't have built in, and workflows that run without you watching.

for engineers

Building on top of Claude, and using it for the workflows this site is actually about.

related topics

VS Code Cheat Sheet — the editor Claude Code most commonly runs alongside.
Git Cheat Sheet — the version control every Claude Code session operates on top of.