I'm liking the trend of designing runtime-behaviour agnostic libraries in Elixir. We get such powerful runtime capabilities with OTP, but indulged in the wrong

I'm liking the trend of designing runtime-behaviour agnostic libraries in Elixir. We get such powerful runtime capabilities with OTP, but indulged in the wrong context our cool OTP processes can be imposing assumptions onto our users. I'd like to see some kind of generic HTTP contract or REST-API client builder library next so we can have swappable HTTP adapters (e.g. Mint/Hackney). I don't want to depend on a library like HTTPoison or Tesla directly when making a client, instead just generic Request/Response structs or protocols. That way an internal project can use a single HTTP adapter across all REST integrations rather than whatever the library author chose to use.