Tesseract is a web client for Lemmy that was found to be secretly and arbitrarily blocking users, communities and even entire instances. You can see if you’re one of the kool kidz by running
curl -s https://tesseract.dubvee.org/tesseract/api/system/policy | base64 -d | gunzip > policy.json
and grepping your name / instance. Further details can be found in this post.
The poem above is adapted from Bertolt Brecht’s The Burning of the Books, which can be read here. If you would rather read it in the original German, go here.


Is tesseract a front end for tRUTH social? That is a fediverse clone, isn’t it?
It’s a frontend for lemmy. A lemmy server can use it instead of the default UI. Apparently a few big servers such as blahaj and dbzero were using it.
Ah. I use Voyager, which is nice. Wonder what shenanigans it’s up to?
My understanding is that Tesseract is designed primarily for web users, although they apparently also have a PWA.