Personally I don't paste anything. I ask for code examples that demonstrate what I want, and then I adapt it to my needs. It's definitely less powerful than directly sharing code, but it is what it is.

I also run a personal language model server, but that is far less capable than the models available as services. It can still be better than nothing for code O can't share with APIs.

I also use gpt.el a but for editor integration, but I honestly haven't workeded that into my workflow very much yet.