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Technology4h 36m ago
John Mueller stated that LLM systems cannot use files like llms.txt to differentiate between websites for search query results.
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Who
Google’s John Mueller
What
John Mueller stated that LLM systems cannot use files like llms.txt to differentiate between websites for search query results.
When
Mon, 15 Jun 2026 16:28:02 GMT · 4h 36m ago
Where
global ·
Why
Mueller argues that llms.txt files are self-reported and cannot be trusted "by design" for differentiating between websites.
The Frontline Impact
How this affects you
This suggests a significant limitation for LLMs in website discovery, impacting how information is surfaced and potentially delaying standardization of agentic systems; however, llms.txt files may still be useful for agent navigation once a website has been chosen.
Story chain
2 events in this thread- Currently Reading4h 36m agoJohn Mueller stated that LLM systems cannot use files like llms.txt to differentiate between websites for search query results.
- Technology4h 36m agoJohn Mueller stated that LLM systems cannot use files like llms.txt to decide which websites to surface for a given query.Open article