Code labs

Hands-on exercises

Practice building with Claude — right in the browser. Exercises run client-side (Pyodide / a JS worker) with deterministic checks, so the default path stays free with no API-key exposure.

SHELL

In-browser lab runner — wired, awaiting content.

The $0 in-browser runner lands in Phase 2; live execution & the AI Tutor are the deferred, cost-flagged add-ons. This page renders from the static content pipeline; it fills in asSource Material/grows.