A little off-topic, but: one of the challenges of a potential stack add (and it arises in other areas of Stack too) is this:
If you have a *.yaml file that is ‘nicely formatted, with comments’ (from the perspective a human user of the file), and a machine then wants to add (or remove) some element of it, and you want the end result to still be ‘nicely formatted’ (as before) - that is a non-trivial task.
If anybody reads this and knows of an existing Haskell library that can acheive it - please post here! EDIT: By the way, ChatGPT can do it, if you ask it nicely!