Kossman's Offhand Fix

A small QoL mod that makes offhand stack handling feel more natural.

If your offhand already contains a compatible item stack, the mod can refill it instead of immediately moving or swapping the stack elsewhere.

Features

Shift-click refill

Shift-click a compatible stack in your inventory or a supported container to refill the existing offhand stack first.

For example:

• Offhand: Bread x50
• Inventory: Bread x20
• Shift-click
• Result: Offhand x64, Inventory x6

Smarter swap key

Pressing the swap-hands key (F by default) refills a compatible offhand stack before performing a normal swap.

This works both during gameplay and while hovering an inventory slot.

Vanilla fallback

If refilling is not possible, Minecraft behaves normally.

This includes:

• different items
• incompatible item components
• full offhand stacks
• non-stackable items
• normal inventory clicks
• hotbar number-key swaps

Compatibility