The treehouse is built on its own custom data format called .tree.
I'll spare the explanation, because it's an extremely simplistic format, but know that it nests:
TOML metadata
Djot markup
inside of itself.
TOML metadata is defined by Attributes from the treehouse crate.
Djot on the other hand has support for generic attributes.
Keys are not documented (read the generator if you want to know about them), but generally :-prefixed keys are
reserved for the treehouse's own purposes.
You probably don't want to read the content if you're not me.
Browse the treehouse yourself, experience it fully, and then when you're sure you don't want to get spoiled, come back
here and look for weird stuff.
