Any ideas for compatibility w. existing cats libraries?

[hejfelix]

The typelevel and cats eco system is sizable, does it make sense to make a compatibility layer like e.g. https://github.com/djspiewak/shims ?

[jcouyang]

Definitely, just I don't have anything in mind what the user case like, maybe start with a http4s example can drive this through