With stuff like this, do you honestly not feel that you've probably been tricked and that someone else actually did this?

Don't get me wrong, I think AI can do some surprising things, but with stuff like this, often it just stole the code and the steps without attribution, it didn't figure it out.

There'll probably be a blog post detailing exactly how to do this somewhere and Claude just copied the steps and code.

And worse, Google search would have found it 10 years ago, but Google search today would claim there are no results?

I think incredibly specific stuff like this often won't pass the 'did Claude just steal this?' test when you dig into it.