Prompt & Done · ANATOMY pack

One line to Claude, a working machine

Anatomy is a free, open-source (MIT) Claude Code skill by @wheresryan22. Ask how something works and it builds an interactive figure you can drag and tap.

1 Install (Claude Code)

npx skills add wheresryan22/anatomy -g -a claude-code

Needs Node.js 20.10+ and Chrome (for its self-checks). No API keys. Also runs in Codex, OpenCode, Antigravity and MiniMax Code: see the README.

github.com/wheresryan22/anatomy

2 The exact prompt from the reel

/anatomy explain how an LLM picks its next word and what temperature does, interactive. One HTML page, light theme, fits a phone screen.

Our run (17 Oct 2026): Claude Opus 5.5 in Claude Code, 6 min 40 s, $1.77 of usage at API list price. The word odds in that machine are example numbers; the softmax and temperature maths are real.

3 Know before you run it

It uses your Claude plan or API usage. Small figures took us minutes; big ones take much longer (a review measured about 2 hours for a mechanical watch). It draws machines and instruments, not charts or people.