Jeremy Howard published the first revision of llms.txt on August 10, the first update since the format launched in 2024. The spec is widely adopted and remains open for feedback on GitHub.
* Formalizes link relations so coding agents can discover Markdown versions of pages
* Keeps original `.md` filename pattern + adds a second extension-replacement pattern
* `rel="alternate" type="text/markdown"` → Markdown version of the page
* `rel="describedby"` → points to the llms.txt file
* Expressible via HTML `` elements or an HTTP Link header
* Target is coding agents / documentation tools, not search visibility
* Formalizes link relations so coding agents can discover Markdown versions of pages
* Keeps original `.md` filename pattern + adds a second extension-replacement pattern
* `rel="alternate" type="text/markdown"` → Markdown version of the page
* `rel="describedby"` → points to the llms.txt file
* Expressible via HTML `` elements or an HTTP Link header
* Target is coding agents / documentation tools, not search visibility
