LLMs.txt
LLMs.txt explained
Someone using extensive documentation first needs to find the right information. A curated overview can help when the system actually reads it. This is the practical idea behind .
**Guidance rather than access control.** The file describes content and links to further resources. It replaces neither authentication nor technical access controls. Confidential information does not belong in a public overview. The file alone also does not determine whether a particular use is permitted.
**Distinguish the proposal from support.** The original proposal was updated to version 2 in August 2026. Check the requirements of the intended consumer. Google explicitly states that its search does not use llms.txt as a visibility or ranking mechanism.
A useful implementation has a clear purpose and maintained links. Assess whether it actually improves retrieval of relevant information. An extra file without readers or maintenance does not itself create value.
Examples
Hypothetical application
A support agent needs to search public product documentation. The team gives it a curated overview and checks whether it finds suitable current evidence for specific questions. Value is measured for that workflow.
Key Points
- Curated content guidance for supporting systems.
- Not access control or protection for confidential information.
- No guaranteed search or citation advantage.
- Check purpose, links and maintenance.
Practical application
Define which system will read the overview and how you will assess better use of information.
Useful measures
Task success
Does the intended agent find correct, current information for concrete questions?
Link quality
References lead to available and relevant sources.
Common mistakes
- Confusing a public overview with access control.
- Linking visibility promises solely to the file’s existence.
Sources and context
- Jeremy Howard: The /llms.txt proposal, v2
Original proposal for a curated content path for agents; not access control or a search guarantee.
- Google Search Central: Generative AI optimisation guide
Guidance for Google’s generative search; no guarantee of inclusion, citations or rankings.
Frequently Asked Questions about LLMs.txt
No. llms.txt describes a route through content. robots.txt communicates crawler rules; that file also does not replace access protection.
The llms.txt specification is not a technical training block. Appropriate separate measures are needed for usage terms and access control.
No. Identify a specific consumer or documented workflow. The file does not establish a basis for claiming a Google ranking advantage.
Related links
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