How to add llms.txt to WordPress in 2026: spec v2, the Lighthouse audit and five plugins compared
Jeremy Howard published version 2 of the llms.txt proposal on August 10, 2026, two years after the original. One line is required. WordPress.org now serves such a file at its own root, Chrome's Lighthouse checks for it since version 13.3, and three of the four biggest WordPress SEO plugins generate it in their free builds. For a site owner the decision has three parts. Whether to publish the file…
Jeremy Howard introduced the second version of the llms.txt proposal on August 10, 2026, expanding upon the original proposal from two years prior. To add llms.txt to a WordPress site in 2026, site owners must decide whether to publish the file, generate it manually, or use a plugin. The five most commonly used SEO plugins - Yoast SEO, Rank Math, All in One SEO, and Prime SEO - generate llms.txt files with varying lengths ranging from 75 lines to over 40,000 links per post type.
The Lighthouse audit in Chrome 13.3 checks for the presence of llms.txt and fails if it is missing or improperly formatted. However, Google Search does not currently use the file, and no AI systems utilize it for training or grounding purposes. Despite this, publishing an llms.txt file costs virtually nothing and can provide valuable information for software documentation and coding agents.
Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
