I added lots of Playmode tests, which required me to add assembly definition files.
I also placed an assembly definition file for my Scripts folder.
If I try to build, I get errors for every Editor script in my project.
Even my plugsin like Obirope - Bakery -Dotween- Ludiq. They all throw errors about their corresponding editor folders unless I drag their editor folder into the root directory.
If I delete my assembly definition files and tests, only then can I build my project.