Add photo

Cyril Xu

Scientist by training, developer by choice.

🚀Projects🔬Research📚Tutorial👋About
London, UK

📚Learn by understanding, then building.

Concept explainers, hands-on tutorials, and working notes about artificial intelligence and software.

How To

How To Build a RAG Pipeline

A step-by-step guide to building a Retrieval-Augmented Generation pipeline from scratch using Python, FAISS, and Claude.

RAG · Python · Claude · Tutorial

February 24, 2026

3 min read

What Is

What Is RAG?

Understanding Retrieval-Augmented Generation — how combining search with LLMs creates more accurate, grounded AI systems.

RAG · LLMs · Vector Database · NLP

February 22, 2026

3 min read

What Is

What Is a Transformer?

A beginner-friendly explanation of the Transformer architecture that powers modern AI — from attention mechanisms to why it changed everything.

Transformers · NLP · Deep Learning · LLMs

February 20, 2026

3 min read

© 2026 Cyril Xu. Built as a growing notebook.