RAG Complete Guide: Build a Local RAG System from Scratch

Wed, 27 Aug 2025 14:00:00 +0800

Building a Local RAG with LangChain + Ollama + pgvector: A Complete Hands-On Walkthrough from 0 to 1 (with uv Dependency Management and an Interview Guide)

This post is a directly actionable document. Follow it top to bottom and you will build a local RAG (retrieval-augmented generation) system from scratch and understand the key concepts and code. All core scripts come with comments to make learning and interview review easier.

LangChain - Tag - Daily Deep Think

RAG Complete Guide: Build a Local RAG System from Scratch

Building a Local RAG with LangChain + Ollama + pgvector: A Complete Hands-On Walkthrough from 0 to 1 (with uv Dependency Management and an Interview Guide)