It would be nice having the shulker box inventory showing up as additional rows in the player's inventory, kinda like the quark backpack. I don't know about auto-picking, but having all the space manageable in one screen feels nicer to me than pressing a keybind. It would also be nice for the hopper to be able to pick items from the equiped shulker inventory.

I don't plan on making the shulker box inventory expand into the inventory, it's a lot more complicated than it might seem to implement. Especially if considering making it compatible with Quark's backpack as well.

As for the hopper, are you suggesting that a player could stand on a hopper and the hopper would take from their equipped shulker box inventory?

I don't plan on making the shulker box inventory expand into the inventory, it's a lot more complicated than it might seem to implement. Especially if considering making it compatible with Quark's backpack as well.

I see, i can understand that, thanks for answering anyway

As for the hopper, are you suggesting that a player could stand on a hopper and the hopper would take from their equipped shulker box inventory?

Yes, it seem like a nice feature to have, if only a bit superfluous. It's that kinda detail that make stuff feel more cohesive and alive.