A couple more you may find interesting:

1. Xc [https://xcfile.dev/] - an md-based task runner

2. Literate [https://github.com/zyedidia/Literate] - a literate programming tool

Took a look at inkjet. It looks quite nice. I'm going to give it a try!

I wrote this to list/run named markdown blocks from README.md files, etc:

https://github.com/skx/runme

It's a trivial project, but it has been useful for reference and documentation a time or two.

(Though I guess a Makefile would be the obvious alternative; that too is often a collection of named drivers/recipes within a project.)

We are building a api client with executable markdown as well - https://voiden.md/ . API specs, tests, and docs are in one Markdown file.

Thanks, it is definitely an underutilized concept. I think Pete Koomen is right that we will see many more tools adopt this approach. And I hope that Claude Code and Codex add direct support for this themselves too.