How to log / know when an full rebuild (ABI incompatible) has happened

Currently debugging / helping with an annotation processor which seems to change the ABI all the time, no matter what change - triggering a full rebuild.

Is there any event or way to have a log during a build so it is singaled that it was a full rebuild?

I want to make a reproducer project and it would be needed there since it’s the example project size is too small to surely notice if it was a full rebuild or not