llms.txt

An emerging standard for telling AI systems what content on your site to use and how. Analogous to robots.txt but for LLMs.

Definition

An emerging standard for telling AI systems what content on your site to use and how. Analogous to robots.txt but for LLMs.

Why this matters

llms.txt adoption is still nascent but is becoming a meaningful AI Discovery signal in 2026.

Where it sits in The Standard™

This term is part of the canonical AI Discovery vocabulary, published in the Body of Knowledge alongside the Eight Discovery Signals and The Methodology Handbook. The full glossary contains 56 terms — the operative vocabulary for AI Discovery practitioners.

Practitioner note

Practitioners certified through Certified™ are tested on the AI Discovery vocabulary. This glossary is the institutional reference.

Find out where you stand in 7 days.

The AI Discovery Audit™ delivers a 0–1000 score, an eight-signal breakdown, and a 90-day roadmap. From $800.

Get Your AI Visibility Audit