I just found a neat trick. I started talking to GPT-5-mini. I had a relatively long set of back and forths, but in the end decided to go to a more powerful model.

I'd like to speak to another LLM. Please give me a prompt getting the next LLM up to speed efficiently with all context and my choices. Use a fence block to make copying the prompt easier.

This prompt is entirely unremarkable, but for how I started the prompt.