My generated sources can be found under

builddir/generated/*

but arent usable inside my project. Intellij does not recognize the packages/classes. Trying to reference to them using

Class.forName

during runtime does also not work. Generated classes from Android Room (kapt) are usable.. What am I missing?

https://github.com/google/ksp/issues/746 intellij doesn't recognize the ksp source roots without some additional effort, but it should work when compiling with Gradle out of the box

Thank you, will check that as the first thing in the morning.

android, presumably? that will fail for a release build