Backpacks can equip separately from chest armor, so player armor logic stays clean.
Backpacks belong beside armor.
Backpack Gear gives Minecraft mod developers a shared backpack equipment layer: real slot behavior, common item detection, tooltip support, rendering hooks, and clean APIs for wearable backpack mods.

Chestplate+Backpack Slot
One small dependency. Cleaner backpack mods.
What It Solves: slot, API, tag, sync, render.
Mods call the public helpers for registration, detection, equip, unequip, and reads.
Simple integrations can use the backpack_gear:backpacks item tag instead of Java registration.
Client/server sync and rendering hooks let integrated mods show backpacks on the player.
Register backpack gear in code or data.
Quick Integration. Register your item in Java or with the backpack_gear:backpacks tag. Your mod keeps recipes, storage rows, textures, and GUI behavior.
YourMod.java
import net.arthurorsi.backpackgear.api.BackpackGearApi;
public void onInitialize() {
BackpackGearApi.registerBackpackItem(MyItems.MY_BACKPACK, 6);
}