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llms.txt is a proposed plain-text file that lists your site's key pages for AI systems to read. It is not an official standard, and adoption by major AI crawlers is inconsistent — it is a low-cost addition, not a substitute for a crawlable, well-structured site.
Adding an llms.txt file at your root domain is cheap and unlikely to hurt, but no major AI product has confirmed it reliably uses one the way search engines use robots.txt or sitemap.xml. Treat it as a nice-to-have, not a priority — the crawlable pages, clean HTML, and real content behind it matter far more than the file itself.
Wally focuses on the fundamentals that reliably matter — clean, crawlable pages and consistent public content — rather than betting on unproven technical shortcuts.