> draw the owl
"The rest of the fucking owl" is a meme about laughably incomplete instructions, in case you didn't catch the reference: https://knowyourmeme.com/photos/1272765-how-to-draw-an-owl
"Draw the owl" is a pretty ironic rule, because it's horribly incomplete itself unless you're familiar with that particular meme.
I wonder how many people work at Twilio who have heard "draw the owl," and know it has something to do with being consistent, but has no idea what it means or why it seems to be clear to everyone else?