Go to Joplin -> Configuration -> More information
In the area of the Joplin version, there is "Hermes enabled" with a value of 0 or 1 beside it.
I've found a few mentions in Github issues. They seem to be from copy-pastes of environment settings to troubleshoot other issues. Nothing so far on Hermes itself.
Anyone here know?
Interesting name. Assuming it involves speeding something up, delivering something, or at least moving something around 