I've been meaning to write a blog post a bit like this one for ages, but this is much better than I would have done. I think the author is right, private evals are very important and this post gives a good framework of how to design your own -> thundergolfer.com/blog/private...
You should have private evals
Everybody should have a personal set of test prompts to try on LLMs.
thundergolfer.com