Evidence-first investigations into how real websites succeed or fail with AI crawlers and search engines. Every finding is reproducible with the commands shown, every subject is named so the evidence can be checked, and each study ships as a page and a PDF in English and Vietnamese. New to the topic? Start with the blog.
How the Sofitel Legend Metropole Hanoi passed every SEO test while returning an infinite 301 loop to GPTBot, ClaudeBot, PerplexityBot and Googlebot arriving through a proxy. One header explains it. Reproducible with two curl commands.