SmartSlot: The One-Stack Rule
by Saike05
SmartSlot limits each inventory slot to a single stack of 64 units, so a full stack of one item stops further copies of that type from filling the inventory.
What it does
Players who gather a lot of cobblestone can see their inventory clogged with ten stacks of the same block. SmartSlot applies a one-stack rule: once a stack reaches its limit, additional items of that type are filtered out instead of taking more slots. The mod is a lightweight utility that works on Forge for Minecraft 1.20.1 – 1.20.6, with files for each of the six release versions, and it runs on the client or the server, with neither side required. The license is All rights reserved, so the code is not open source.
Key features
Single-stack limit
Each inventory slot holds at most one stack of 64 units of a blocks or items type.
Automatic filtering
After a full stack, extra items of the same type are filtered out rather than stored in new slots.
Lightweight design
The utility adds only the one-stack rule and no new blocks, items or screens to the game.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does SmartSlot need to be installed on the server?
In the catalog
SmartSlot: The One-Stack Rule is one of 4,058 Storage mods on ModsFinder, and one of 1,886 Storage mods for Forge. 11,154 mods support Minecraft 1.20.6.
Similar mods
What the author says
Tired of your inventory getting clogged with 10 stacks of cobblestone? SmartSlot is a lightweight utility mod that limits blocks to a single stack (64 units). Once you have a full stack, any additional items of that type are automatically filtered out.
Official listing
- Modrinth page
- modrinth.com/mod/smartslot-the-one-stack-rule
- Owner
- Saike05
- Published
- 2026-02-27
- Updated on Modrinth
- 2026-02-27
- Facts verified
- 2026-10-15