🔧 Building a RAG Chatbot with FastAPI and ChromaDB (that runs locally, no API key)

Everyone wants a chatbot that can answer questions from their own documents — a company handbook, a contract, a research paper. The technique behind this is called RAG (Retrieval-Augmented Generation).

I build production RAG and LLM systems for a living, and I kept re-wiring the same foundation on every project. So I cleaned it up into a small,...