Originally published on angeo.dev . Checked against llmstxt.org v2, revised 10 August 2026, and against the published request data as of September 2026. We shipped a validator that could certify a broken llms.txt file as valid. The bug was simple. The spec recommends a short summary in a blockquote under the title. Our checker looked for a line starting with > . It never looked at what came after it. A store with no meta description produced a bare > and nothing else, and...