llms.txt

What Is the llms.txt Protocol?

llms.txt is a standard protocol pioneered by Answer.AI, designed to allow AI language models to understand websites more accurately and holistically. The /llms.txt file placed in a website's root directory provides structured, high-level information about the site: who the company is, what services it offers, which sections should be read first, and specific instructions for AI crawlers.

While robots.txt governs search-engine crawlers, llms.txt directs AI models (like ChatGPT, Claude, Perplexity, Google Gemini). When these models conduct research on the web or gather context, they can use the llms.txt file as a preferred entry point.

Why Does It Matter Now?

As AI-powered search (ChatGPT Search, Perplexity, Google AI Overviews) rapidly grows, traditional SEO signals alone may not be sufficient for AI engines. llms.txt offers a machine-optimised, concise, and reliable way to define a site.

Detartech adds an llms.txt file to all corporate projects it builds, positioning it as a core component of the GEO (Generative Engine Optimization) strategy. The file content is kept aligned with Schema.org data to create a consistent corporate identity signal.