Would 1000% prefer to use Pi (https://github.com/badlogic/pi-mono) for building anything relating to AI agents.

It's already battle-tested in super popular applications (like OpenClaw for example and many others), has 100s of extensions, is already built in a type-safe language, excellent community. And it also includes a full TUI and WebUI for interface support.

Also Pydantic is a VC backed business now trying to funnel people into using their paid cloud services. No thanks.