Clever! But what problem does this actually solve? When I see a type alias of a string and enumerated variants then why would I pass in arbitrary strings? Th

Clever! But what problem does this actually solve? When I see a type alias of a string and enumerated variants then why would I pass in arbitrary strings? There are _always_ ways to break assumptions. Putting arbitrary, complex guard rails at every call site doesn’t make a program magically better. An API is primarily about affordances. We provide utility to the caller.