Samuel Colvin

Toolsets, OpenAPI and Model Context Protocol

3

TL;DR I spoke to @dsp on Friday, and the plan is to add support for MCP to PydanticAI via something I'm currently calling "toolsets". One of the things I've realised...

Jinja support?

4

Instructor (and other libraries) support jinja templates for system prompt building, see [here](https://python.useinstructor.com/blog/2024/09/19/instructor-proposal-integrating-jinja-templating/#validation). It would be pretty easily for us to support, then again it doesn't need to be build...

Sqlite otel instrumentation doesn't seem to be working.

Examples builder

4

We plan to add an examples builder which would take a sequence of things (e.g. pydantic models, dataclasses, dicts etc.) and serialize them. Usage would be something like ```py from...

How do we implement tools that "do something"

4

Currently `retriever`s are tools that are expected to be benign, e.g. have no side effects, so you don't care if the models chooses to call them or not. Technically there's...

Add `message_limit` (number of model messages) and `cost_limit` to `run()` methods

1

To mitigate the risk that an agent gets into an infinite loop.

Stricter docstring usage

1

We should support explicitly setting the format to use, and raising a warning/error if not all parameters are documented set either on the decorator or on Agent `__init__`.

Vector search and embeddings API

17

Currently we don't have anything, and the [RAG example](https://github.com/pydantic/pydantic-ai/blob/main/pydantic_ai_examples/rag.py) just uses OpenAI's plain API to generate embeddings. It seems simple enough to add a dedicated API to models to generate...

Migration command/guide?

3

Is there any command or migration guide for converting an existing project to using uv? `uv init` doesn't work, and I'm a bit unclear on the steps required. (I maintain...