Chapter 1 — Foundations of AI Engineering & RAG

6 LESSONS

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Understand what RAG is, why it matters, and how it fits into modern AI architectures.

What is AI Engineering?

What is AI Engineering?

RAG, agents, workflows, fine-tuning, API services

Why companies use RAG instead of fine-tuning

Why companies use RAG instead of fine-tuning

Why RAG ?

AI engineering stack

AI engineering stack

LLMs → Orchestration → Retrieval → MLOps

From Data ingestion to generation

From Data ingestion to generation

Data ingestion → chunking → embeddings → vector database → retrieval → generation

Where hallucinations come from

Where hallucinations come from

Build a minimal RAG pipeline in 20 lines

Cosine similarity vs dot product

Cosine similarity vs dot product

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