Builtin Library
README.md
assets.typeDoc
One asset type's own documentation — what it IS, the shape of its folder, how it is authored, and what it does for you.
A type's README says things no signature can: which file is the source, what regenerates when you write it, what the type handles so you do not have to. Read it before building anything that resembles what the type describes; that is the moment a project turns into a few lines.
It reads an installed type: assets.installedTypes lists those, and a type not
installed yet is found by searching. assets.typeBehavior gives the
operations the type answers to.