Introduced as a community standard in 2024, llms.txt borrows the spirit of robots.txt but serves a different purpose. Rather than restricting crawlers, it hands AI models a concise map: which documents matter, how they relate, and where clean context lives. The format favors readable markdown links so models can ingest meaning efficiently during retrieval.
Adoption remains voluntary and not all AI providers honor the file, so Acromatico treats llms.txt as one signal among many rather than a guarantee of inclusion. When paired with strong schema, clean semantic HTML, and extractable content, the file can streamline how models understand a site's structure and priorities during grounding and citation.
Related terms
Questions people ask
No. As of 2026 llms.txt is a community-proposed convention, not an official standard ratified by a body like the W3C. Some tools and publishers support it, but major AI providers have not universally committed to reading it, so treat it as complementary rather than essential.
No. Robots.txt controls crawler access and sitemaps list URLs for indexing. llms.txt instead provides a human-readable, curated summary aimed specifically at language models. The three files serve distinct roles and are best maintained together rather than substituted for one another.
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