What it does
An AI coding agent's "harness" is everything around the AI model: its instructions, tools, workspace, memory and the checks on its work. This course teaches how to design that setup so agents work more reliably.
It mixes lectures with projects, such as building automated loops where one AI does the work and another checks it. It also breaks down how well-known tools, including Claude Code and Codex, build their own harnesses. It's available in 15 languages and includes a ready-made skill to set up a harness for your own project.
Who it's for
Developers who use AI coding agents and want to get more dependable results.
Can I use it without coding?
Yes. You can read the course online. The projects need an AI coding agent and some technical comfort. New to this? Start here.
Can I run it?
- Cost
- FreeNothing to pay or sign up for.
- Computer
- An ordinary computer is fine
- API key
- Not needed
Try it
- Pick your language and start with the first lecture in the repository.
- Work through the hands-on projects using your own AI coding agent.
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page. Copies with similar names exist for many popular projects.
- License (MIT): Very permissive: free to use, change and share, including for business.
- More on staying safe