Inventory Expansion - yyz's Backpack Mod

Directly Integrated Backpacks


🌟 Mod Highlights

⚡ Seamless GUI Integration

Backpack slots appear directly in work GUIs (inventory/crafting table/chest etc.) without opening extra interfaces.

🛠️ Enhanced Features

• 🖱️ Item Transfer
  Shift+Left Click → Transfer to main inventory
  Shift+Right Click → Transfer to backpack
  Double Click → Auto sort items
• 📦 Item Collection
  Automatically stores items in backpack when inventory is full
  Backpack drops as single item upon death (contents preserved)
• 🔥 JEI/REI/EMI Integration
  Supports using backpack items directly in JEI/REI/EMI crafting
  Real-time backpack content display in recipe interface
• 💍 Accessory Support
  Backpacks can be placed in Curios/Trinkets slots

🎒 Backpack Tiers

Backpack Type	Extra Slots	Special Ability
Wooden	+9	Basic capacity
Stone	+18	Basic capacity
Iron	+27	Basic capacity
Gold	+36	Basic capacity
Diamond	+45	Basic capacity
Netherite	+54	Fire Immunity

⚙️ Compatibility

Status Key

• ✅ Fully Compatible
• ⚠️ Partial Support
• ⌛ Planned
• ❌ Unsupported

Feature Support Status

Feature	1.21.6	1.21.5	1.21.4	1.21.2-1.21.3	1.21.1	1.20.5-1.20.6	1.20.2-1.20.4	1.20.1	1.19.4	1.19.3	1.19-1.19.2	1.18-1.18.2
JEI		✅	✅		✅	✅	✅	✅	⌛	⌛	⌛	⌛
Curios		✅	✅		✅	✅	✅	✅	⌛	⌛	⌛	⌛
Trinkets					✅	✅	✅	✅	⌛	⌛	⌛	⌛
Quark								⚠️			⚠️	⚠️
Accessories			⚠️	⚠️	⚠️			⚠️
REI		⌛	✅	✅	✅	✅	✅	✅	⌛	⌛	⌛	⌛
EMI					✅	✅	✅	✅	⌛	⌛	⌛	⌛
Inventorio							⚠️	⚠️	⌛	⌛	⌛	⌛
IPN	⚠️	⚠️	⚠️	❌	⚠️	❌	❌	⚠️	❌	❌	❌	❌
Inventory Sorting	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛
3D Models	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛
Doggy Talents Next	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛	⌛
AE2	⌛	⌛	⌛	⌛	✅	⌛	⌛	✅	⌛	⌛	⌛	⌛

❓ Why This Backpack?

Traditional backpack mods = mobile chests requiring separate GUIs. Our solution:

1. Seamless experience - Access backpack items directly in work GUIs
2. Native interaction - Full support for recipe book/JEI/REI/EMI
3. Backpack swapping - Swap when placing backpack in backpack slot/inside
4. Continuous expansion - Growing mod compatibility support

⚠️ Current Status

The mod is currently in a very early stage. If you find any bugs, you can report them via GitHub or Discord

❗ Found an issue or have suggestions? Report now!

• GitHub
• Discord

🔧 In development:

• More GUI support
• Backpack 3D models
• Expanded mod compatibility

✨ Design Philosophy: Make backpacks a natural extension of the main inventory