Reading the original release post for Anubis [0], it seems like it operates mainly on the assumption that AI scrapers have limited support for JS, particularly modern features. At its core it's security through obscurity; I suspect that as usage of Anubis grows, more scrapers will deliberately implement the features needed to bypass it.
That doesn't necessarily mean it's useless, but it also isn't really meant to block scrapers in the way TFA expects it to.
That doesn't necessarily mean it's useless, but it also isn't really meant to block scrapers in the way TFA expects it to.
[0] https://xeiaso.net/blog/2025/anubis/