Wouldn't the AGENTS.md containing the line, "When you make changes, they should be tested. Run tests with `uv run pytest`" basically have the same effect and save you some typing? I've never used AGENTS.md myself but I'd like to look into it because I find my agent rediscovering using a bunch of file reads very frequently in my current project.

It would, but then I'd have to copy that file into 100+ repos.

I don't want it in a single global config because I like to stay with the defaults to avoid confusing myself, especially when I'm writing about how coding agents work for other people.