Core AI

RAG & Vector Search

Retrieval-augmented generation, vector databases, embeddings and semantic search

5,068
lessons
Skills in this topic
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RAG Basics
beginner
Chunk documents with LangChain or LlamaIndex
Vector Stores
intermediate
Set up Pinecone, Weaviate, or pgvector
RAG Evaluation
intermediate
Run RAGAS evaluation on a RAG pipeline
Advanced RAG
advanced
Build a hybrid BM25 + dense retrieval pipeline
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Dev.to AI 🔍 RAG & Vector Search ⚡ AI Lesson 52m ago
RAG local en .NET: Chatea con tu Documentación (sin nube, sin API keys)
RAG local en .NET: Chatea con tu Documentación (sin nube, sin API keys) Pregúntale a un modelo de lenguaje sobre la documentación de tu producto y míralo improv
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Dev.to AI 🔍 RAG & Vector Search ⚡ AI Lesson 53m ago
Build a Local RAG in .NET: Chat With Your Docs (No Cloud, No API Keys)
Build a Local RAG in .NET: Chat With Your Docs (No Cloud, No API Keys) Ask a language model about your product's documentation and watch it improvise. It has ne
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What Is RAG? Or: How I Stopped Trusting My Chatbot’s Confidence
Medium · LLM 🔍 RAG & Vector Search ⚡ AI Lesson 3h ago
What Is RAG? Or: How I Stopped Trusting My Chatbot’s Confidence
I was demoing a chatbot to a client a few months back. Solid model underneath. Answers came out fast, well-worded, confident. The client… Continue reading on Me
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Query Transformation Techniques — HyDE, Multi-Query, and Step-Back Prompting
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 3h ago
Query Transformation Techniques — HyDE, Multi-Query, and Step-Back Prompting
Retrieval-Augmented Generation (RAG) systems are only as good as the queries they send to the retriever. Even with strong embedding models… Continue reading on
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Building Your First RAG Application: How to Give AI Access to Information It Was Never Trained On —…
Medium · AI 🔍 RAG & Vector Search ⚡ AI Lesson 5h ago
Building Your First RAG Application: How to Give AI Access to Information It Was Never Trained On —…
In Part 27, we learned how RLHF made ChatGPT more helpful by training it on human feedback. Continue reading on Medium »
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Designing a Multi-Tenant RAG Pipeline: Lessons From Building an AI Chatbot Platform
Dev.to · Danish Raza 🔍 RAG & Vector Search ⚡ AI Lesson 11h ago
Designing a Multi-Tenant RAG Pipeline: Lessons From Building an AI Chatbot Platform
Most "scalable system design" articles describe theoretical systems handling millions of users that...
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Where RAG Fails: Understand the Limitations
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 15h ago
Where RAG Fails: Understand the Limitations
It usually begins with the tutorial. You embed a handful of PDFs, save the vectors in Chroma/Qudrant, stich the pipeline together with… Continue reading on Medi
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How to Stop RAG Hallucinations Poisoning Your Vector Store
Dev.to · Elizabeth Fuentes L 🔍 RAG & Vector Search ⚡ AI Lesson 19h ago
How to Stop RAG Hallucinations Poisoning Your Vector Store
A fintech RAG pipeline poisoned its own vector store and the LLM-as-a-judge validator approved every hallucination. The fix: gate writes with code.
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RAG Didn't Die—It Moved Up The Stack
Forbes Innovation 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
RAG Didn't Die—It Moved Up The Stack
The narrative that RAG is dead has been repeated by enough credible voices that many engineering leaders have started to believe it.
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Vectorless RAG in Practice: Explainable Retrieval Without Embeddings
Medium · AI 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
Vectorless RAG in Practice: Explainable Retrieval Without Embeddings
Why I stopped chunking documents and started walking trees instead Continue reading on Medium »
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Vectorless RAG in Practice: Explainable Retrieval Without Embeddings
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
Vectorless RAG in Practice: Explainable Retrieval Without Embeddings
Why I stopped chunking documents and started walking trees instead Continue reading on Medium »
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What Does a RAG System Actually Cost in Nigeria? (Naira Pricing Breakdown, 2026)
Medium · Machine Learning 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
What Does a RAG System Actually Cost in Nigeria? (Naira Pricing Breakdown, 2026)
Real numbers, not guesses — a transparent cost breakdown for building and running a Retrieval-Augmented Generation system in Nigeria. Continue reading on Medium
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What Does a RAG System Actually Cost in Nigeria? (Naira Pricing Breakdown, 2026)
Medium · Data Science 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
What Does a RAG System Actually Cost in Nigeria? (Naira Pricing Breakdown, 2026)
Real numbers, not guesses — a transparent cost breakdown for building and running a Retrieval-Augmented Generation system in Nigeria. Continue reading on Medium
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What Does a RAG System Actually Cost in Nigeria? (Naira Pricing Breakdown, 2026)
Medium · NLP 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
What Does a RAG System Actually Cost in Nigeria? (Naira Pricing Breakdown, 2026)
Real numbers, not guesses — a transparent cost breakdown for building and running a Retrieval-Augmented Generation system in Nigeria. Continue reading on Medium
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Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
RAG with Real-Time Search: Why Fresh Data Matters
RAG (Retrieval-Augmented Generation) is everywhere. But here’s the problem most tutorials don’t address: your retrieval corpus is static. Continue reading on Me
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How AI Understands What You Mean, Not Just What You Say
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
How AI Understands What You Mean, Not Just What You Say
The technology behind RAG — and why it changes everything about search Continue reading on Medium »
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Which Semantic Search Tool Works Best for Clinical and Regulatory Documents?
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
Which Semantic Search Tool Works Best for Clinical and Regulatory Documents?
Why clinical and regulatory documents break general search engines Continue reading on Medium »
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I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · Python 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
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I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
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I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · Python 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
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I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
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RAG Looks Simple Until You Build It: The Architecture Nobody Shows You
Medium · LLM 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
RAG Looks Simple Until You Build It: The Architecture Nobody Shows You
The vector database is the easy box. The real system lives in everything that happens before and after retrieval. Continue reading on AegisOps »
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RAG Looks Simple Until You Build It: The Architecture Nobody Shows You
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 1d ago
RAG Looks Simple Until You Build It: The Architecture Nobody Shows You
The vector database is the easy box. The real system lives in everything that happens before and after retrieval. Continue reading on AegisOps »
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Building a RAG Pipeline That Survives Real Documents
Medium · LLM 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Building a RAG Pipeline That Survives Real Documents
Getting messy documents ready to search. Continue reading on Medium »
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Medium · AI 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
From “It Works” to “I Can Prove It Works”: Building an Evaluation Harness for a RAG Pipeline
How a six-step learning project on ISO/IEC 27001 turned into a lesson about what actually separates a demo from an engineering artifact. Continue reading on Med
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Medium · Programming 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
From “It Works” to “I Can Prove It Works”: Building an Evaluation Harness for a RAG Pipeline
How a six-step learning project on ISO/IEC 27001 turned into a lesson about what actually separates a demo from an engineering artifact. Continue reading on Med
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Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
From “It Works” to “I Can Prove It Works”: Building an Evaluation Harness for a RAG Pipeline
How a six-step learning project on ISO/IEC 27001 turned into a lesson about what actually separates a demo from an engineering artifact. Continue reading on Med
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RAG6-Stoll-CPS&RAG
Medium · NLP 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
RAG6-Stoll-CPS&RAG
Case Reports Unlocked: A Technical Reading Note on RAG for Child Protective Services Case Narratives Continue reading on Medium »
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RAG6-Stoll-CPS&RAG
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
RAG6-Stoll-CPS&RAG
Case Reports Unlocked: A Technical Reading Note on RAG for Child Protective Services Case Narratives Continue reading on Medium »
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Part 1: Beyond Naive Chunking: Why Production RAG Needs Multi-Representation Indexing
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Part 1: Beyond Naive Chunking: Why Production RAG Needs Multi-Representation Indexing
Beyond Naive Chunking: Why Production RAG Needs Multi-Representation Indexing Continue reading on Medium »
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Why Naive RAG Fails: Common Mistakes That Break Retrieval-Augmented Generation in Production
Medium · Deep Learning 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Why Naive RAG Fails: Common Mistakes That Break Retrieval-Augmented Generation in Production
Retrieval-Augmented Generation (RAG) has become one of the most important techniques in modern AI applications. It powers enterprise… Continue reading on Medium
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Why Naive RAG Fails: Common Mistakes That Break Retrieval-Augmented Generation in Production
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Why Naive RAG Fails: Common Mistakes That Break Retrieval-Augmented Generation in Production
Retrieval-Augmented Generation (RAG) has become one of the most important techniques in modern AI applications. It powers enterprise… Continue reading on Medium
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Our RAG Accuracy Has a Ceiling and It Could Be the Page Break
Medium · Data Science 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Our RAG Accuracy Has a Ceiling and It Could Be the Page Break
The retrieval misses that cluster around our most structured documents are not random. They trace back to a quiet assumption almost every… Continue reading on M
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Summary RAG System
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Summary RAG System
This is a tutorial to create a RAG system that gets the key points from a PDF file. Continue reading on Medium »
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Is Your AI Making Things Up? Meet RAG: The Ultimate Solution for Accurate Information
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Is Your AI Making Things Up? Meet RAG: The Ultimate Solution for Accurate Information
Artificial Intelligence has transformed how we work, but it has a massive secret: it doesn’t actually “know” everything. Continue reading on Medium »
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You Probably Don't Need a Vector Database for RAG
Dev.to · Arthur 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
You Probably Don't Need a Vector Database for RAG
RAG retrieval strategies without a vector database: BM25, keyword indices, knowledge-in-bundle — and when embeddings earn their cost.
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Building a Self-Healing RAG Pipeline With LangGraph, LangChain, and LLM-as-Judge
Hackernoon 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Building a Self-Healing RAG Pipeline With LangGraph, LangChain, and LLM-as-Judge
RAG systems can confidently generate answers that contradict their own retrieved context, with no errors anywhere to flag it. This article builds a self-healing
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Dev.to AI 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Why 70% of RAG projects never reach production in 2026
The demo lies because the dataset is polite A 50-document RAG demo is almost designed to succeed. The documents are clean, the questions are friendly, and the p
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Bigger Context Windows Didn't Make Our RAG Smarter
Dev.to · ValeryKot 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Bigger Context Windows Didn't Make Our RAG Smarter
We stopped measuring retrieval quality by how many tokens we could fit into the prompt. When...
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Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
The R in RAG
Retrieval-Augmented Generation (RAG) has fundamentally changed how Large Language Models (LLMs) answer questions. Continue reading on Medium »
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The Knowledge Publisher Pattern: Solving RAG Staleness at the Source
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
The Knowledge Publisher Pattern: Solving RAG Staleness at the Source
RAG knowledge rots because it’s maintained separately from the code it describes. The Knowledge Publisher Pattern fixes it at the source… Continue reading on Me
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Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
RAG Is Not Enough: Why AI Agents Still Need Live Search
RAG helps AI systems use what you already know. Live search helps them understand what changed outside your knowledge base. Continue reading on Medium »
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Dev.to AI 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
The Knowledge Publisher Pattern: Solving RAG Staleness at the Source
RAG knowledge rots because it's maintained separately from the code it describes. The Knowledge Publisher Pattern fixes it at the source: every module ships its
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3 Common RAG Mistakes That Break AI Systems (Before the LLM Even Starts)
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
3 Common RAG Mistakes That Break AI Systems (Before the LLM Even Starts)
Most people blame the LLM when their RAG system gives a bad answer. Continue reading on Medium »
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I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · Python 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
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I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
View lesson → + Playlist
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
Medium · RAG 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
I Built RAG for 10 Million Documents. Here’s What Actually Stops Hallucination
What actually changes when you go from a 10K-document demo to a production system handling ten million, and why most RAG tutorials quietly… Continue reading on
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Citation Design for RAG: Generate, Validate, and Display Source References So Users Trust Your…
Medium · Data Science 🔍 RAG & Vector Search ⚡ AI Lesson 2d ago
Citation Design for RAG: Generate, Validate, and Display Source References So Users Trust Your…
Last week we built evaluation metrics across retrieval, generation, and end-to-end quality. Continue reading on Operations Research Bit »
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