For more detail see the Gemfile for Hey [0], posted in a follow-up tweet. [1]
[0] https://gist.github.com/dhh/782fb925b57450da28c1e15656779556
[0] https://gist.github.com/dhh/782fb925b57450da28c1e15656779556
> gem 'turbo', github: 'basecamp/turbo'
I get a 404 when trying to access it, so maybe still private till the big reveal?