AI Document Chatbot Based on RAG Architecture: A Complete Open-Source Solution for Enterprise Knowledge Q&A

This project is an AI document chatbot based on the RAG (Retrieval-Augmented Generation) architecture, using React for the frontend, Flask for the backend, and MySQL for the database. It implements semantic search and intelligent Q&A functions, providing a complete technical solution for enterprise document knowledge management. It addresses the limitations of traditional keyword search and the hallucination problem of pure generative models by combining document retrieval with generative AI, ensuring answer accuracy and conversational fluency.

In the digital transformation of enterprises, the efficient utilization of massive document knowledge is a common challenge. Traditional keyword search struggles to meet complex query needs, and pure generative AI answers have hallucination risks. The RAG architecture combines document retrieval with generative AI, ensuring both answer accuracy and natural conversational flow, thus becoming a solution.

Core of RAG Architecture: When a user asks a question, relevant fragments are first retrieved from the knowledge base, then input into a large language model (LLM) to generate an answer, solving the knowledge limitations and hallucinations of pure generative models. The workflow includes document preprocessing, vectorization encoding, vector index storage, semantic retrieval, context generation, and LLM generation. Project Tech Stack: Frontend React (conversation interface, document management, etc.); Backend Flask (document processing, embedding service, retrieval service, etc.); Data Layer MySQL (stores sessions, document metadata, text chunks, conversation history, etc.).

The system supports multi-format documents such as PDF, Word, and TXT, with automatic parsing and chunking; uses semantic search to improve recall rate; answers are traceable, showing the source documents they are based on; supports multi-turn conversations and understands contextual context.

Applicable scenarios include enterprise internal knowledge bases (employee document queries), intelligent customer service assistants (handling complex problems), academic research assistance (literature exploration), education and training support (student question-and-answer learning), etc.

Environment requirements: Python 3.8+, Node.js, MySQL, embedding model, and LLM API permissions. Performance optimization: Upgrade vector database, cache popular queries, process documents asynchronously, optimize chunking strategy. Security and privacy: Pay attention to permission control, API key management, data encryption, and log auditing.

This project provides a complete technical reference solution for enterprises and developers. The React+Flask+MySQL stack ensures complete functionality and a concise architecture, making it an open-source project worth learning from for building private knowledge base Q&A systems.