Groups.yml defines the different groups that users can enter when their hack level rise. Each of these groups is accompanied by a level, which is the level a user must have before entering that group, a color, which is the ChatColor that will be used to address this group across the system, and an Action, which is will be executed when the user enters the group.
The format of the groups is as follows:
GroupName : Level : Color : Action
The default groups.yml contains an example group that will never run:
Custom : -1 : GREEN : COMMAND[ban &player;say hello world]
This group will never be entered by a player because they cannot have a level below 0. You can use this example group as a template for adding your own groups to the system.