This is a compatibility mod whose only purpose is to provide cross-mod integration between FTB and non-FTB mods. It does nothing on its own, but adds mod integration based on what other mods it detects.
All mod dependencies (both FTB and non-FTB) are soft dependencies. So this mod will start up if no other mods are present, but won't do anything useful.
Read more about FTB XMod Compat on our docs site https://go.ftb.team/docs-xmod
The following cross-mod integrations are added to FTB Quests, if present:
If Game Stages is present, and KubeJS is not present:
If either REI or JEI is present:
If neither KubeJS nor Game Stages is loaded, FTB Quests will use an inbuilt stages implementation based on string "tags" which can be added to players. This works but is extremely limited in functionality (either a player has a given tag, or doesn't).