I wrote a little garden plot called Exit Planning which was my initial plans for how to take over after I die. The end result is a sealed folder in a file cabinet that my partner knows to look at. In there, I have a page on my servers: contact information about who to handle administration/takeover, how much it costs, and what I would like to be done with it.
Overall, JSON5 (having comments and end-of-line commas is a big reason I got into YAML).
I suffer with YAML, but use it pretty heavily. It also has the * and & operators which I use fairly heavily, and it fits well with the Markdown + YAML I use, but I hate that whitespace indenting with a passion.
Occasionally, I look at Nickle (https://github.com/tweag/nickel) and KDL (https://kdl.dev/) and I get really tempted, just haven’t made that jump.
Final boss fights are for experimentation. “Well, I don’t think I’ll need these five thousand items, what does this do?”