There's an assumption sitting quietly inside most engineering teams: if Google can crawl and render our site, AI crawlers can too.

It's wrong. And it's the single most expensive wrong assumption in technical SEO right now.

The gap

Googlebot renders JavaScript. It has done for years — the page goes into a render queue, headless Chromium executes the scripts, the result gets indexed. Deferred, but it works.

AI crawlers don't render anything.