In my experience, Gemini is pretty good in multishotting. So just give it a system prompt, some example user/assistant pairs, and it can produce great results!

And this is its biggest weakness for coding. As soon as it makes a single mistake, it's over. It somehow has learned that during this "conversation" it's having, it should make that mistake over and over again. And then it starts saying things like "Wow, I'm really messing up the diff format!"