How to persist values between "game" and "shell" contexts

[BobobUnicorn]

It seems the entire JS context is destroyed when switching between "shell" and "game" contexts (i.e. between in-game and main menu). I've found that Automation.setParameter is able to persist data between these contexts:

// set arbitrary strings to the specified key
Automation.setParameter('CurrentTest', <key: string>, <value: string>);

// get strings from the specified key
const value: string = Automation.getParameter('CurrentTest', <key: string>);

I've not been able to determine how Automation.setParameterSet works, but the above should be sufficient for all serializable data.