L.IDX
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2026
Index · Learn
Articles on llms.txt and AI search.
The long-form library.
Background reading for site owners and small teams who want to ship llms.txt, understand what AI assistants actually do with it, and tell whether the work is paying off. New articles are added when something on the spec or the AI search landscape shifts in a way that’s actionable.
Complete guide · 15 min read
What is llms.txt? The complete guide for site owners
From the GEO/AEO terminology landscape to step-by-step install instructions and the misconceptions that trip site owners up. Written so a non-developer can ship it in an afternoon.
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Long read · 8 min
llms.txt vs robots.txt vs sitemap.xml
A side-by-side guide to the three small files at the root of your site. What each does, who reads them, and how they work together for AI search.
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Reference · 7 min
llms.txt vs llms-full.txt — when to publish each
llms.txt is the curated table of contents. llms-full.txt is the full-text bundle. Here's how the two differ, when each is worth publishing, and what large sites like Anthropic and Stripe do.
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How-to · 9 min
How to measure the impact of llms.txt and AI search
There is no Google Search Console for ChatGPT yet. Here are the four signals that actually move — server logs, referral traffic, manual citation audits, and on-site behaviour — and how to track each.
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How-to · 6 min
How to check whether AI search has picked up your site
A practical month-one checklist for confirming that ChatGPT, Claude, Perplexity, and Google AI Overviews can actually find and cite your site — using only the tools every site owner already has.
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