llms.txt
A markdown file served from your website's root that helps AI crawlers understand your site structure and find the canonical content.
Proposed by Answer.AI in 2024, adopted by Anthropic, Cursor, Vercel, and others. The file lists your key pages with one-line descriptions. Often paired with llms-full.txt, a complete content corpus for AI ingestion. Both should be referenced from your site's HTML head.
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