I knew I wasn't the only one that had this idea

[amilkov3]

hey I just started working on a validation lib as well: https://github.com/amilkov3/validen, however mine involves specifying validations via a simple spec language as opposed to programmatically (though there is a validation AST). i think our libraries would compliment each other well as they currently address separate use cases but share commonalities (ValidatedNel from cats and well a functional approach in general). would you want to collaborate and maybe eventually combine the two?