Matrix · Site-level file
ContentMachine & Agent Interfaceslow effortmedium volatility
The myth
Publishing an llms.txt file makes your site discoverable to LLMs.
The receipt says
No major LLM crawler reads llms.txt. It is a signaling gesture, not a technical requirement.
Impact
1.5
How much this moves citations
Consensus
0.5
How much the industry agrees
Evidence
85%
Strength of underlying research
Engines
4
ChatGPT, Claude, Perplexity, Gemini
Nuance
Harmless to publish; do not expect measurable citation lift.
Primary source
llms.txt has no measurable effect on LLM crawling or citation
Expert commentarySearch Engine Land
John Mueller (Google) and independent crawler log analyses show major LLMs do not fetch llms.txt; adoption is a signaling exercise, not a ranking factor.
https://searchengineland.com/llms-txt-google-mueller-449831 ↗Published 2024-09-15 · Evidence 85%
Applies to
ChatGPTClaudePerplexityGemini