# RAG Architectures and Failure Modes · AtomEons Atlas

**Route:** `atomeons.com/learn/atlas/rag-architectures`
**Category:** Atlas
**License:** CC-BY 4.0 unless otherwise noted on the page.

## Description

Retrieval-augmented generation done right — chunking, reranking, hybrid search, the lost-in-the-middle problem. Why most production RAG fails and what the working patterns look like in 2026.

## Headings

- RAG architectures — and why most of them fail
- What it is
- How it actually works
- Receipts
- What practitioners do with it
- What it is NOT

## Body

§ Atlas · Retrieval · LLM application architecture

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*All lab content is CC-BY 4.0. Cite as: AtomEons Systems Laboratory, RAG Architectures and Failure Modes · AtomEons Atlas, atomeons.com/learn/atlas/rag-architectures.*