I've done some thinking on what makes sense and ended up at this very rough first sketch. Comments welcome. https://gist.github.com/hlandau/ed6a96150c69945143b

I've done some thinking on what makes sense and ended up at this very rough first sketch. Comments welcome. https://gist.github.com/hlandau/ed6a96150c69945143be https://gist.github.com/hlandau/ed6a96150c69945143be