Definition
llms.txt is a plain-text file at the site root that indexes the site for large language models — what the organisation is, which pages matter, and how they relate. It is an emerging convention rather than a standard.
Why it matters
Cost is close to zero and there is no downside. Whether any given platform reads it is not publicly confirmed, which is a reason to keep it accurate rather than a reason to skip it.
Related terms
Concepts that only make sense together
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