ai-agent

pydantic-ai: Build AI Agents

Name: pydantic-ai: Build AI Agents
Author: pydantic

Get an AI agent framework with pydantic-ai.

19,047 stars2,475 forksPythonGuide quality 8/10Updated 8/4/2026100% free · open source

What it does

Pydantic-ai provides a framework for building AI agents using Pydantic, allowing founders to create structured and scalable AI models

When to use it

•When building a custom AI model that requires strict data validation and typing
•When integrating AI capabilities into an existing Pydantic-based application
•When needing to create a scalable and maintainable AI agent framework

Ready-to-paste prompt

from pydantic_ai import agent; @agent(config={'model': 'resnet50', 'task': 'image_classification'}) class MyAgent(pydantic.BaseModel): pass

Heads up: Ensure you have the latest version of Pydantic installed, as pydantic-ai relies on Pydantic's latest features, and older versions may cause compatibility issues

Saves to your device

Use with Claude

New

Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.

✅ Light setup

Installs with a command or two; your AI agent can do it for you.

Try it instantly — no install

Claude Code

mkdir -p ~/.claude/skills/pydantic-ai && curl -fsSL https://workflowstacks.com/api/skills/pydantic-ai/claude-skill -o ~/.claude/skills/pydantic-ai/SKILL.md

Open in another AI app

Opens the app with this repo with the prompt ready to go — no copy-paste needed.

Connect the whole catalog (MCP)

claude mcp add --transport http workflowstacks https://workflowstacks.com/api/mcp

Adds a WorkflowStacks connector to Claude Code: search and load any skill here by chatting.

How pydantic-ai: Build AI Agents works

Codeflow

Free to inspect

Pydantic-ai: Build AI Agents is a very large Python project (~178k lines across 449 code files, plus 303 test files). Setup is light: installs like a normal app. Reading the code is optional. Last commit this month, MIT license, has a test suite.

Size

Very large codebase

~178k lines · 449 code files · days to read — use, don't read

Setup

One-command install

Installs like a normal app. Reading the code is optional.

Runs on

Python

No API keys detected

Python 100%

Where to start reading

1
README.md
Start here — what it does and how to install it
2
AGENTS.md
The instructions the AI actually follows
3
pyproject.toml
Dependencies and the commands it exposes
4
examples/README.md
A worked example — copy this to get going

What's in each folder

docs/Documentation252 files

examples/Examples you can copy62 files

pydantic_ai_slim/Folder337 files

pydantic_evals/Folder33 files

pydantic_graph/Folder18 files

scripts/Helper scripts9 files

clai/Folder6 files

agent_docs/Folder5 files

READMEHas testsDocumentedCI checksExamples includedMIT licenseUpdated this month