One of my favorite API design principles is this: Ask developers for intent, not implementation. Most messaging APIs make you decide how to send a message: – SMS – WhatsApp – RCS Your application knows who it wants to reach. It shouldn't have to figure out how best to reach them. That's infrastructure. I have been trying @sentdm, and I like the abstraction they chose. You don't pick a channel. You simply send: – a phone number – a message Sent decides how to deliver it based on…