Code Archaeology

Dec 22, 2025 · Artificial Intelligence

RAG Explained: Core Concepts, Architecture, and a Minimal LangChain Demo

This article introduces Retrieval-Augmented Generation (RAG), covering its origins, core components (retriever and generator), advantages like reduced hallucination and knowledge updatability, architectural challenges such as chunk sizing and vector search algorithms, and provides a step-by-step LangChain implementation using FAISS, SentenceTransformer, and DeepSeek.