I wish to make a reusable, generic API for adding and accessing additional equipment slots to entities. My initial motivation for this comes from my backpacks (BetterStorage and later Wearable Backpacks), which should really just be able to make use of a "back" slot, ideally. Along with wanting to be able to carry certain other containers à la TerraFirmaCraft.
- Baubles
defines a specific hardcoded set of extra slots: Amulet, head, 2x ring, body, charm, belt. Though I've noticed that some slots get little attention from the other mods, compared to the more popular ring and amulet slots.
On the other hand, sometimes they're not enough - there's other mods that do the same thing as Baubles, offering even more extra equipment slots!