Enterprise-level GenAI RAG Pipeline: Building a Production-Grade Document Intelligent Processing System

The Enterprise-level GenAI RAG Pipeline is an open-source production-grade document intelligent processing system developed by kingryukendo, aiming to solve the AI hallucination problem in LLM applications. Based on FastAPI, RAG paradigm, and advanced NLP technologies, the system supports asynchronous processing, dynamic prompt engineering, and vector search, providing enterprises with accurate domain-specific responses. Its core values include eliminating hallucinations, ensuring data privacy, supporting real-time updates, and delivering domain-precise answers, applicable to scenarios such as intelligent resume screening, enterprise knowledge base Q&A, and contract review assistance.

Today, with the widespread application of LLMs, the AI hallucination problem (models generating seemingly reasonable but incorrect answers) plagues enterprise users. Retrieval-Augmented Generation (RAG) combines external knowledge retrieval with language model generation to make up for the knowledge limitations of traditional LLMs. For enterprises, the value of RAG lies in: 1. Eliminating hallucinations based on real documents; 2. Ensuring data privacy using internal private documents; 3. Adding new documents to the knowledge base at any time without retraining; 4. Providing specialized answers for specific industries.

The system adopts a microservice architecture, with core components including: 1. FastAPI backend: High-performance asynchronous API interface supporting concurrent LLM calls; 2. RAG engine orchestrator: Coordinates embedding generation (PyTorch+HuggingFace to convert to 1024-dimensional vectors), semantic search (ChromaDB vector database), and prompt chain (multi-stage optimization); 3. LLM integration layer: Supports OpenAI API, Google Gemini, and LangChain; 4. Data persistence: ChromaDB (vector storage), SQLAlchemy (metadata), NumPy/Pandas (data processing). Core functions include asynchronous processing, dynamic prompt engineering (three-stage optimization), strict input/output validation (Pydantic), and vector search (cosine similarity).

Typical application scenarios include: 1. Intelligent resume screening: Extract skill keywords and match them with job positions, outputting scores and analysis; 2. Enterprise knowledge base Q&A: Vectorize and store internal documents, and obtain accurate information through natural language queries; 3. Contract review assistance: Quickly locate key clauses and identify risk points. API usage example: The POST /api/v1/query interface can extract document skills and return confidence scores. For example, the request body contains parameters such as document_id and user_query, and the response includes results like extracted_skills and confidence_score.

The Enterprise GenAI RAG Pipeline provides enterprises with an out-of-the-box document intelligent processing solution to solve the LLM hallucination problem, and flexibly integrates private data sources through a modular architecture. Future development directions include: Integrating RLHF to improve scoring accuracy, supporting PDF image parsing with multimodal RAG, automating deployment via CI/CD pipelines, and upgrading agent workflows to LangGraph/AutoGen autonomous agents.