Short answer: We talk, like all we are team leaders. We decide all together. There is no long answer for this. And this is not magic. Try it. It is like deciding what to eat all together. Just make a free and natural office environment that everybody can talk.
If you want some diagram for our decision steps here is an unnecessary diagram.
Other "How we do X at Onedio" posts
- How we overcome monday morning syndrome at Onedio http://tayyar-code.blogspot.com/2016/06/overcome-monday-syndrome-onedio.html
- How we use Slack at Onedio http://tayyar-code.blogspot.com/2016/06/progressive-slack-usage-at-onedio.html