I put the text in to gptzero's AI checker and it came back with being Highly Confident it was 100% AI written. I don't think I've ever seen it that confident that the entire thing was AI before.

Claude's style is obvious enough I don't think you really need the checker.

You can tell it's Claude only from reading the H2 tags on the page.

> What happens on October 19

> If you're close to a limit

> What changes and what doesn't

Yes it is, but 100%? Typically someone goes through and touches something to clarify or add a detail.