I've put some stuff in my global Claude.md to avoid things like...

* Claude trying to install packages into my Python system interpreter - (always use uv and venvs)

* Claude pushing to main - (don't push to main ever)

* When creating a PR, completely ignoring how to contribute (always read CONTRIBUTING.md when creating a PR)

* Yellow ANSI text in console output - (Color choices must be visible on both dark and light backgrounds)

Because I got sick of repeating myself about the basics.