Seahaven

Seahaven is a Python framework that allows developers to build synthetic, realistic, and stateful virtual worlds that AI agents can interact with. It is designed for reinforcement learning (RL) and evaluation scenarios, supporting parallel isolated instances with reproducibility, detailed change logs for grading, and integration with OpenEnv and MCP clients. It enables quick creation, serving, and testing of AI environments that simulate real-world APIs and tools with composable and reusable components.