[nailer]

Use js files for config. They support comments, syntax highlighting will work out of the box, and you can require them.

[leichtgewicht]

A problem that I have with my article is that readers seem to get hung up on the config loading bits when I tried to use it as an example for a more-general problem.

To fix this I added a section to the article: https://t.co/sXJhTYXQvy

(Using executable files for configuration can be an enormous problem for some uses.)

[nailer]

I think it's a poor example. I don't want to choose between 20 different config file formats. Give me a config file in a format I know.