llms.txt & AI SEO — The Knowledge Base

Everything you need to understand llms.txt, AI citation optimization, and GEO in 2026.

★ Cornerstone Guide

The Ultimate Guide to llms.txt

The definitive, everything-in-one-place resource on what llms.txt is, why it matters, and exactly how to create and deploy yours for maximum AI discoverability.

Read the Full Guide

⬡ Fundamentals

What Is llms.txt? A Plain-English Primer

Understand the purpose, structure, and syntax of the llms.txt standard from scratch.

Read →

llms.txt vs robots.txt — What's the Difference?

A side-by-side comparison of two files that serve entirely different machines.

Read →

⬡ Comparisons

llms.txt vs llms-full.txt — Which Do You Need?

Break down the two variants of the llms.txt ecosystem and when to use each.

Read →

llms.txt vs sitemap.xml — Complementary or Competing?

How llms.txt and sitemap.xml work together for both AI and traditional crawlers.

Read →

⬡ AI SEO

What Is GEO (Generative Engine Optimization)?

A complete introduction to GEO and why it matters for AI-driven search in 2026.

Read →

How AI Models Choose Which Sources to Cite

Inside the retrieval and ranking logic that determines AI citation behavior.

Read →

⬡ ChatGPT SEO

How to Get Your Site Cited by ChatGPT

Actionable steps to make your content surface in ChatGPT responses and browsing.

Read →

ChatGPT Browsing & Retrieval — How It Works

Technical breakdown of ChatGPT's search and retrieval pipeline for web sources.

Read →

⬡ Perplexity SEO

How to Rank in Perplexity AI Answers

Strategies and signals that influence Perplexity's citation and answer generation.

Read →

Perplexity's Retrieval Architecture Explained

Deep dive into how Perplexity indexes, retrieves, and attributes web content.

Read →

⬡ Claude SEO

Getting Your Content Cited by Claude

Optimization techniques specific to Anthropic's Claude and its citation patterns.

Read →

Claude's Web Search & Source Attribution Model

How Claude accesses and attributes web sources in its generated responses.

Read →

⬡ Technical Experiments

Measuring the Impact of llms.txt on AI Citations

Real-world experiments tracking whether adding llms.txt moves the citation needle.

Read →

Advanced llms.txt Configurations & Edge Cases

Multi-section files, optional fields, and non-standard setups tested and explained.

Read →