adds casts, uses ?= instead of .=
adds casts, uses ?= instead of .=

ngzax/urbit,urbit/urbit,ohAitch/arvo,joemfb/arvo,ohAitch/arvo,ngzax/urbit,urbit/urbit,cgyarvin/arvo,ngzax/urbit,belisarius222/arvo,urbit/urbit,ngzax/urbit,belisarius222/arvo,urbit/urbit,jfranklin9000/urbit,ngzax/urbit,jfranklin9000/urbit,urbit/urbit,jfranklin9000/urbit,jfranklin9000/urbit,ngzax/urbit,cgyarvin/arvo,urbit/urbit,jfranklin9000/urbit,Fang-/arvo,solri/arvo,eglaysher/arvo,jfranklin9000/urbit,joemfb/arvo,urbit/urbit,ngzax/urbit,jfranklin9000/urbit