LongTrainer: The Production-Ready Python RAG Framework That Replaces 500 Lines of LangChain Boilerplate

Build multi-tenant AI chatbots with persistent memory, streaming, tool calling, and 9 vector DB providers — in 10 lines of Python. The RAG Boilerplate Problem Nobody Talks About Every developer building a production RAG chatbot eventually faces the same wall. You start with a LangChain tutorial. Y