Yes, you can't use Copilot to generate files in your code structure way if you start from scratch. I usually start by coding a skaffold and then use Copilot to complete the rest, which works quite good most of the time. Another possibility is to create comment templates that will give instructions to Copilot. So every new Go file starts with coding structure comments and Copilot will respect that. Junior Devs might also respect that, but I am not so sure about them