llms.txt Specification

llms.txt Specification is a specification in the llms.txt Ecosystem category of Generative Engine Optimization resources. Built with Jupyter Notebook, it has 2,372 stars on GitHub and is actively maintained.

The official llms.txt spec by Jeremy Howard. The standard for making your site AI-readable.

This resource is part of the Awesome GEO curated collection — a hand-picked set of open-source tools, libraries, research papers, and frameworks for optimizing web presence across AI search engines like ChatGPT, Perplexity, Gemini, and Claude.