Hm... A Twitter comment is not documentation, but:

> every skeleton screen you've ever hand-coded is a waste of time

> you're literally measuring padding and guessing widths to build a worse version of a layout that already exists in your DOM

> so I made a package that just reads the real one

Linked from the readme.

But it has animated logo (that you have to click on to start) and chart of GitHub stars progression in time!