[smallerfish]

I will experiment with this at the weekend. Once thing I found useful with supplying a json schema in the prompt was that I could supply inline comments and tell it when to leave a field null, etc. I found that much more reliable than describing these nuances elsewhere in the prompt. Presumably I can't do this with functions, but maybe I'll be able to work around it in the prompt (particularly now that I have more room to play with.)