too late at night to lookup but i’ve seen this idea before around HN and I myself am drawn to taking a whack at building a tool like this. this is one of those ideas where whatever I can imagine as a UI almost immediately feels not good enough and it isn’t one of those UIs where you can iterate your way to a good solution.

after thinking about this for on and off i can’t think of anything better than nested lists combined with detail/summary in HTML