`/llms.txt` — evidence-based reframe (June 2026)

TL;DR

/llms.txt is not currently consumed by any major AI search system, and Google now states in its own docs that Google Search ignores it. Generate one anyway as low-cost optionality for non-Google AI services, but never present it as a Google ranking or citation lever in any claude-seo report.

Primary-source evidence

Source	Date	What they said
Google AI optimization guide (docs)	2026-06-29	You don't need llms.txt/AI-text files for Google Search (incl. generative AI features); doing so "won't harm (nor help) your visibility or rankings in Google Search, as Google Search ignores them."
John Mueller (Google)	2026	Called the llms.txt discovery/differentiation use case "a dead end."
John Mueller (Google) — Reddit + Bluesky	2025	"No AI system currently uses llms.txt." Compared the file to deprecated meta keywords.
Gary Illyes (Google) — Search Central Live	July 2025	Google has no plans to support llms.txt.
SE Ranking — 300k-domain study	November 2025	Among the 50 most AI-cited domains, only one had an `/llms.txt`.
OtterlyAI — server-log audit	2025	0.1% of AI-bot traffic targets `/llms.txt` (84 of 62,100 requests).
Anthropic, Stripe, Cloudflare, NVIDIA — published files	2024–2025	All publish `llms.txt`. None have stated their crawlers consume third-party `llms.txt` files.

Where it does matter

llms.txt is increasingly consumed by AI coding agents (Cursor, Continue, Cline, Claude Code) when loading per-library documentation. Mintlify auto-generates /llms.txt and /llms-full.txt for thousands of developer-docs sites. For a developer-tooling site, publishing llms.txt is a net win — it helps agents quote the docs accurately.

For a non-developer business site, the value is purely defensive: zero cost, possible future-optionality if a major AI provider eventually adopts it.

How claude-seo treats `llms.txt`

seo-geo audits report presence of /llms.txt and /llms-full.txt.
The audit notes whether the file is well-formed (Mintlify-style markdown).
The audit explicitly does not assign citation-ranking weight to it.
If the user asks to generate one, claude-seo produces a minimal valid example and a banner stating "Google Search ignores llms.txt (Google docs, 2026-06-29); no major LLM provider has confirmed consumption; ship for non-Google optionality, not for citation".

When this guidance changes

Update this file (and the seo-geo audit copy) when:

Any major AI search system (Google AI Overviews, ChatGPT Search, Perplexity, Bing Copilot) publishes documentation confirming llms.txt consumption.
OtterlyAI or SE Ranking publish a follow-up study showing a measurable inflection in /llms.txt request rate.
John Mueller / Gary Illyes / equivalent retract their 2025 statements.

Last verified: 2026-06-21.

/llms.txt — evidence-based reframe (June 2026)