Official interactive course to write better prompts for Claude.
This is a step-by-step tutorial designed by Anthropic with 9 chapters and hands-on exercises. It teaches you how to structure prompts, prevent errors, and handle complex real-world tasks. You can experiment directly in interactive playgrounds or a Google Sheets version.
Focuses on Claude models and recommends using their Google Sheets extension.
Not sure how to install, or if it’s safe? Read the beginner guide
Yes, the tutorial itself is completely free to read on GitHub or duplicate via Google Sheets. However, running Claude API calls during interactive exercises may require an Anthropic API key with usage credits.
It is open source (? license) with 39,280 GitHub stars, last updated 2026-08-28. Download only from the official link on this page, and scan the file before installing: see the safety checklist in our beginner guide.
While the core concepts of prompt structuring apply broadly, the tutorial is specifically tailored with examples, techniques, and system behaviors optimized for Anthropic's Claude models.
Compiled from the project README. 39,280 GitHub stars (2026-11-13) · License not stated · Last update 2026-08-28