Open source. Open possibilities.

Pydantic AI is a type-safe Python AI SDK for building extensible agents with end-to-end typing, supporting various models, interfaces, and durable execution.

Pydantic is a data validation library for Python that leverages type hints to enforce data structures.

LangChain is a framework designed for building agents and applications powered by Large Language Models (LLMs), providing a modular architecture to chain interoperable components.

FastAPI is a modern Python web framework for building APIs with standard type hints, featuring automatic OpenAPI documentation, data validation via Pydantic, high performance via Starlette, and interactive Swagger UI and ReDoc interfaces.

A text-based 5e-compatible RPG where an AI Dungeon Master uses an MCP/SQLite game engine for real dice rolls, persistent stats, spell slots, and combat.

LangGraph is a low-level orchestration framework for building stateful, long-running AI agents, offering durable execution, human-in-the-loop control, memory, and deployment tooling.

fastapi-faults is an MIT-licensed Python package for FastAPI that defines typed RFC 9457 Problem Details from domain exceptions, reuses one immutable Fault definition for runtime responses and OpenAPI documentation, and supports feature-local registries, typed extension fields, and built-in framework error normalization.

SQLModel is a library for interacting with SQL databases in Python, designed to reduce code duplication by combining SQLAlchemy and Pydantic.