Authoritative first but it is also recursive if you specify a parent.
Query logging can be easily implemented.
I don't expect to ever make this as full featured as BIND. Then again, this also was true of Glauth, and correctness-as-a-goal ends up forcing us to roll lots of functionality in the software.
Is this meant to be recursive or authoritative DNS?
Is there an equivalent of query logging?
Are there plans to make this full featured liked BIND, or definitely not because your goal is to keep it "no fat, light"?