@sourcaffeine the “shutdown immediately” is a bit of a misnomer. The fog client works on cycles and the next checkin cycle will cause the action to be performed.
The GreenFOG service is the legacy client way of performing the shutdown task and even then it would only do this on the time you schedule. The new client uses power management which will do what we call on demand or scheduled items. On demand will happen the next cycle the client checks in.
I’m very sorry this free project doesn’t fit your requirements for documentation. The fog client doesn’t need much documentation because the main fog server tells the client what to do. The documentation we have is quite robust I find. And while I can’t document every thing we have been working hard to keep things as updated as we can.
The user guide should be fairly robust to give you enough information to use fog.