Tesseract Utils (T.U for short) is an addon that add a mix of QoL features and useful tools, inspired by modern vanilla and mods like world edit and axiom. 95% of the features are CREATIVE ONLY. Adding or modifying useful commands such as /summon, /kill, /give, etc You can find all the features added in the wiki linked below:
https://github.com/BTW-Community/Tesseract-Utils/wiki