This is pretty neat. I'm always in favor of multiple levels of data validation and your use of Moose is good in this sense. Check out Data::Manager as well (o

This is pretty neat. I'm always in favor of multiple levels of data validation and your use of Moose is good in this sense. Check out Data::Manager as well (or Data::Verifier if you just want the validation goodness), it uses Moose's type constraint system to validate your data.