Some years ago, my team at GitHub grew from 2 full time individual iOS contributors (and one manager who could still code), to 7 of us ICs. Growing a team by 3.5x meant that certain behaviors, concepts or principles that were easy enough to agree upon with just two folks now needed to scale up to many independent people. I wrote up this document for our repo's CONTRIBUTING.md to try to capture our growing team's guiding light in what made a great pull request or the building blocks of a great fe...