Our monthly tracker re-checked /llms.txt on the same fixed cohort — the Tranco top-30 (list 94Y92) — on 2026-09-01. This note is generated from the logged snapshot, nothing else.
The numbers
- 2 of 30 domains serve a spec-valid llms.txt (6.7%)
- 9 serve something at /llms.txt at all (valid or malformed)
- 1 were unreachable to our probe this run
- Unchanged from the 2026-08-01 snapshot (2/30).
Why a fixed cohort
Same 30 domains every month means the line is comparable — adoption movement, not sampling noise. The heavier top-1,000 baseline (8.5% valid) lives in the full data study , dataset downloadable under CC BY 4.0.
Check your own
The spec is cheap to satisfy and most of the web still hasn't: validate yours with the llms.txt validator , or generate a spec-valid file in the browser with the generator . The five signals AI engines actually need are covered by the free checker .
No comments yet