What it does
AutoHarness is a plug-in for Claude Code, an AI coding assistant. As you work, it watches your sessions and writes down useful lessons as skills, which are instructions the assistant can reuse later.
It merges skills that cover the same situation, updates them as they are used, and removes ones that stop being used. Its makers say it only touches the skills it wrote itself and leaves yours alone.
It runs in the background with no setup beyond installing it, and you can also ask it to save a lesson right away.
Who it's for
Programmers who use Claude Code and want it to remember lessons from past work.
Can I use it without coding?
Developers only. It is installed inside Claude Code and needs Python on your computer. New to this? Start here.
Can I run it?
- Cost
- Free, but needs an AI accountThe software is free, but it uses an online AI service (like OpenAI or Anthropic), which usually charges for use.
- Computer
- An ordinary computer is fine
- API key
- Not needed
Try it
- Make sure a recent version of Python is installed on your computer.
- Add the AutoHarness plug-in from Claude Code's plug-in menu, then restart Claude Code.
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