- Class
- C4 Informational
- Weight
- 0
- Severity on fail
- info
- Applies to
Test this rule on a live site with the llms.txt checker. Free, no account needed.
Scope and evidence
Evaluated on preferred origin. The book marks this requirement .
{presence} is "/llms.txt returned {outcome}."
Observations
Each condition has a stable code and a reason template. The evaluator fills the placeholders from observed values only; no sentence in a report is generated.
llms_txt{presence} For your information: Google Search ignores llms.txt files; Google says publishing one will neither harm nor help visibility in Google Search.
Sources, quoted
These are the passages the rule rests on, stored once in the knowledge base and emitted exactly as written. A citation marked for specific conditions appears only on findings with those codes.
“Doing so will neither harm nor help your site's visibility or rankings in Google Search, as Google Search ignores them.”
[G-AI-OPT] Optimizing your website for generative AI features on Google Search · Mythbusting generative AI search: what you don't need to do · last updated 2026-07-10
https://developers.google.com/search/docs/fundamentals/ai-optimization-guide