llms.txt and Markdown Versions: The Spec, Who Uses It, and Implementing It in ASP.NET Core
llms.txt is a Markdown map at the site root made of an H1, a summary and link lists; Google Search ignores it, no major AI search engine has officially said it uses it, and its real use is coding assistants and agents. We cover spec v2, a Minimal API that generates llms.txt and per-post Markdown from EF Core data, Output Cache invalidation and mertozen.com's file.
8 Nov 2026
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9 min
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