Whether the folder itself exists.
Empty defaults says nothing on its own: a folder that declares none and a
folder that is not there both have none. This is what tells the two apart —
false means the reference will fall back to the shared root prompts and
produce a generic agent. A bare name for a pack the user has not enabled
reports false, because that is how it will behave.
OptionalscopeWhich directory the file was found in; omitted when there is no file.
Empty when the folder declares no defaults, or its file could not be parsed.