I like this as reference. I haven't seen a design doc properly used for implementation in a long time. More often design docs are there to facilitate collaborat

I like this as reference. I haven't seen a design doc properly used for implementation in a long time. More often design docs are there to facilitate collaboration - here's the basis of conversation topics that are interesting; these are the things that matter most and here's the foundation for discussion so we can get aligned. It's all too easy for a team to ignore or TL;DR a design doc which goes on and on about things that don't matter, and that can become a problem for an architect trying to implementation which winds up going off the rails because no one actually read the doc.