Long-Trainer

Production-ready RAG framework for Python — multi-tenant chatbots with streaming, tool calling, agent mode (LangGraph), vector search (FAISS), and persistent MongoDB memory. Built on LangChain. Maintained by ENDEVSOLS on GitHub, where it has earned 30 stars from the community.

It's actively developed around langchain, langchain-python, rag, and is a solid reference for anyone building with these tools.