Archipelago maintains a shared folder of information that can be persisted for a machine and reused across Libraries.
It can be found at the User Cache Directory for appname Archipelago in the Cache subfolder
(ex. %LOCALAPPDATA%/Archipelago/Cache).
The Common Cache common.json can be used to store any generic data that is expected to be shared across programs
for the same User.
uuid: A UUID identifier used to identify clients as from the same user/machine, to be sent in the Connect packet
The datapackage folder in the shared cache folder is used to store datapackages by game and checksum to be reused
in order to save network traffic. The expected structure is datapackage/Game Name/checksum_value.json with the
contents of each json file being the no-whitespace datapackage contents.