Filling in details in the writing... I did a little work there, but not much.
I guess I'll have to wait until the weekend to try and make a serious effort. For now, I'd rather try to put all of my conviction that "I should be working on something" into thinking about process improvements or figuring out how to discuss this skeleton of a story with other people.
Okay, I was brushing my teeth and there was one thing I thought of to improve this outline: convert as much of the comments as feasible into [bracketed text] describing what the final version should look like, so the exports have more useful data in them.
I'll start on that tomorrow, because I am tired, and I think I can feel it messing me up right now.