1.1 Update Showcase:

Adds an extra row to the survival inventory:

*the modpack compatability version removes this specific feature because it is not added into
any modded menus because of the way that the inventory is created (mojang hardcoded all of it).
if you're not having this issue, use the main release.

Magic Pockets Enchantment adds an additional slot per level of armor for a max of 16.

it can be enchanted at the enchanting table and found through the loot table

new storage conduit system:

Storage Conduit:

Storage Conduit Connector:

simple assembled system:

Storage connectors will pick up any adjacent inventories and connect to one of the 5 sides of the conduit block (except the front),
maximum of 20 connectors for each system

conduit interface:

right click on tab to rename tooltip, and right click with item to set the tab icon (can be any item)

config to change max itemstack:

values are 64 (default), 128 (default modded), 256, 512, 999, and 1 (challenge mode)

mod compatible with Curios and JEI

IF YOU ARE A MOD DEVELOPER AND WANT TO MAKE YOUR MOD MENUS COMPATIBLE WITH THIS MOD'S EXPANDED INVENTORY, HERE IS A GUIDE TO HELP YOU DO THAT:
https://github.com/chewylopez/Pockets-Mod-1.21.1-Neoforge/blob/main/Magic%20Pockets%20compatability%20guide.pdf

original video: