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I Built RAG From Scratch in Python to Understand It. Here's What I Learned.
Every RAG tutorial I read used LangChain or LlamaIndex and hid the interesting parts. So I built a 500-line RAG pipeline with no frameworks — just pypdf, ChromaDB, and Ollama. The exercise taught me more about embeddings, chunking, and prompt design than a year of using the high-level libraries. Here's the code, the design, and the parts that surprised me.
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I Built RAG From Scratch in Python to Understand It. Here's What I Learned.
Every RAG tutorial I read used LangChain or LlamaIndex and hid the interesting parts. So I built a 500-line RAG pipeline with no frameworks — just pypdf, ChromaDB, and Ollama. The…
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I Built a RAG App, Then Asked It What Car I Like. It Didn't Know.
TL;DR: Phase 1 of a from-scratch RAG app — Spring AI, pgvector, local Ollama — ends with a working...