Will you consider adding the ability to access contents via right-click in hand, in addition to placing on ground?

Regards.

nope because it can't store items when it's not on the player's back slot

aren't you just writing to NBT via the BlockEntity?

ok, I get how you got it working. basically a chest unless you sneak right-click it onto your chest slot

yep

and it's meant to be impossible to remove from the chest slot, and if it's an item on the ground, it just spews out all its contents

ok, I was hoping I could give up on mine because yours is better looking and can place, but if you can't open in your hand, its a different use case. Great work though!

Regards.

mine is Simple Backpacks: https://www.curseforge.com/minecraft/mc-mods/simple-backpack-fabric