I'm curious what issues you've run into, do you happen to have GitHub links so I can have a look? (I'm a maintainer.)
Pydantic still sees multiple commits per week, which is less than it was at one point, but I'd say that's a sign of its maturity and stability more than a lack of attention.
My experience is that pretty frequently the LLM just refuses to actually supply json conforming to the model and summarizes the input instead. Even with several retries configured I still couldn't rely on it. I only spent an afternoon with it though so it's possible I'm just doing it wrong (either in how I'm prompting or in how I'm configuring pydantic-ai).
How recently was that? I made a few improvements earlier this month: https://news.ycombinator.com/item?id=45058214
If the issue is still showing on the latest version, seeing the Pydantic model/schema would be very helpful.
It was about a month ago. I'll take another swing at it and make an issue if I can't overcome it.
Thanks for being a proactive kind of maintainer. The world is better because of people like you.