llms.txt proposal revised to version 2
In short
The llmstxt.org page was updated to v2 on 2026-08-10. v2 adds rel="alternate" type="text/markdown" and rel="describedby" link relations, allows page.md as well as page.html.md, defines how subpath llms.txt files apply, and drops the llms_txt2ctx tooling and the mechanical meaning of the Optional section.
Dated 10 August 2026. Source type: primary source. Read the source, read 4 November 2026.
What it changes for a reader
- The llms.txt reference covers the proposal, the versions and the evidence on whether agents use the file. Open it.
- The guide to serving markdown on request shows the rule and the headers. Open it.
On this site
Sources
- llms.txt v1 to v2 changes https://llmstxt.org/changes.html, read 4 November 2026
Last reviewed 4 November 2026