[abound]

I think mdq [1], which was recently on HN somewhere, fits this.

[1] https://github.com/yshavit/mdq

[tero]

Mdq seems just what I've been looking for. I have yet to test it.

Based on documentation, you can mdq for the chapter whose heading is "## Foobar"; or extract all lists in chapter "### Xyzzy".

Thanks, abound!

Update: mdq discussion https://news.ycombinator.com/item?id=43152704