What is the user problem or growth opportunity you want to see solved?

We need specific instructions for better PRs from Copilot. We can use this blog as a reference: https://github.blog/ai-and-ml/github-copilot/how-to-write-a-great-agents-md-lessons-from-over-2500-repositories/

How do you know that this problem exists today? Why is this important?

Experience with previous PRs generated by Copilot

Who will benefit from it?

Maintainers and open source community

Anything else you would like to add?

No response