pydantic-ai
https://github.com/pydantic/pydantic-ai
Python
GenAI Agent Framework, the Pydantic way
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- Issues
- [aw] Detection Runs
- Add `Agent.to_responses()` to serve an agent as an OpenAI Responses API endpoint
- Conversion to and from ChatCompletionMessageParam
- Thinking-part re-render leak parity: `groq` / `huggingface` / `xai`
- Cerebras: wire `<think>`-tag reasoning replay for `qwen` models (follow-up to #5891)
- Anthropic mapper re-renders unsigned/foreign `ThinkingPart`s as literal `<thinking>` text in the prompt — model mimics it and leaks reasoning into user-visible answers
- Stream and run cancellation semantics tracker
- Guard against discriminated-union / discriminator-tag drift in `messages.py` (test-suite robustness)
- Expose Gemini 3 Web Search sources on `NativeToolReturnPart`
- Preserve optional dependency import errors
- Docs
- Python not yet supported