Building a RAG System From Scratch — Four Components, One Working Pipeline

Most RAG tutorials explain the concept. This one shows the code — a complete working pipeline using LangChain, ChromaDB, and a local LLM via LM Studio. No OpenAI API key.

Source: [Dev.to](https://dev.to/rit_the_coder/building-a-rag-system-from-scratch-four-components-one-working-pipeline-5ad8)