kCGSWindowChangedSpace?

[AlexStrNik]

I'm not sure of the exact event name, but event type 817 in CGSEventType (or when used with CGSRegisterNotifyProc) corresponds to a window changing its space, likely only for managed spaces. The data size is 8 bytes: the first 4 bytes represent the new spaceId as a UInt32, and the last 4 bytes seem to be unused. I thought it would be helpful to mention this, as it might assist someone else. Also, thank you for your work—it has been incredibly helpful to me.