Augeas: http://t.co/89ealBpXHF is very cool. It parses config files, so you can modify them without ad-hoc scripts that might break syntax.
Related Posts
An ad hoc, informally-specified, bug-ridden, slow implementation of half of a text adventure game -- or as I like to call it, a compiler.
The niche of short, environment-specific scripts, and the consequences for programming language design choices: https://brrt-to-the-future.blogspot.com/2021/03/why-bother-with-scripting.html
One cute feature of markdown I'd not noticed before: there's no syntax for images *without* a description (i.e. alt text).
https://spec.commonmark.org/0.31.2/#images