
Modrinth · Minecraft mod
Stackable Shulkers Fix
Fixes issues with stackable shulker boxes in Carpet on 1.20.5+
Quick answer
Which Stackable Shulkers Fix release should I use?
Stackable Shulkers Fix 1.7.8 targets 26.1, 26.1.1, 26.1.2 with Fabric. Do not install it on the client. It must be installed on the dedicated server. All 1 required mods have matching files.
Where it goes
Is Stackable Shulkers Fix required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does Stackable Shulkers Fix 1.7.8 need?
1.7.8. Change the file and its required mods may change too.
Install Carpet first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Stackable Shulkers Fix without breaking your instance.
Built for Stackable Shulkers Fix 1.7.8. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.7.8. It targets 26.1, 26.1.1, 26.1.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Carpet first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.7.8. It opens that exact file at the source.
About this project
What does Stackable Shulkers Fix add?
Stackable shulkers fix
A simple addon to the Carpet mod that fixes the 1.20.5+ behaviour of stacked shulker boxes to be the same as in older versions, as well as some optional features.
Features
NOTE
Features marked asintrusiveare modifying the standard behaviour in their default state. This is done to maintain compatibility with older versions of the mod.
Fixed hopper transfers
Prevents hoppers from stacking shulker boxes, even if the max count is >1.
Setting this rule to false enables the functionality of this mod by preventing shulkers from being stacked by hoppers.
- Name:
hopperShulkerStacking - Type:
boolean - Default:
false - Categories:
shulkerfix,bugfix,intrusive - Since:
1.5
Fixed comparator output
Changes how stacked shulker boxes affect comparator output:
true: Shulkers have signal strength of unstackable items, allowing output up to 897 (AKA OSS/HSS);false: Shulkers have signal strength of stackable items, reaching 15 when all slots are full (hoppers won't be able to fill over SS1);capped: Shulkers have signal strength of unstackable items, but the resulting output is capped at 15. This implementation preserves overstacked item filters.normalized: Any amount of shulkers in a slot is counted as a single unstackable item. This limits the output to signal strength 15 and patches overstacked item filters.
- Name:
overstackedShulkerSignalStrength - Type:
string - Default:
true - Options:
true,false,capped,normalized - Categories:
shulkerfix,bugfix,intrusive - Since:
1.7.1
Legacy shulker item merging
Reintroduces the logic for merging shulker box items before 1.20.5.
The implementation allows partial item merging
(normally the game doesn't merge item stacks if the total amount is more than the max size)
and resets the entity age, allowing faster merging.
(Both were bugs in Carpet, but no one complained, so now we're reintroducing the bugs huh)
- Name:
legacyShulkerItemMerging - Type:
boolean - Default:
false - Categories:
shulkerfix,experimental - Since:
1.6
Hopper collection
Makes hoppers pick up one shulker at a time from an entity stack.
Note that this has a risk of breaking contraptions.
- Name:
hopperCollectSingleShulkers - Type:
boolean - Default:
false - Categories:
shulkerfix,feature,experimental - Since:
1.5
Hopper minecart collection
Makes minecarts pick up one shulker at a time from an entity stack.
Note that this has a risk of breaking contraptions.
- Name:
minecartCollectSingleShulkers - Type:
boolean - Default:
false - Categories:
shulkerfix,feature,experimental - Since:
1.5
Minecart slowdown
Disables the additional slowdown caused by overstacked minecarts.
The implementation makes shulker boxes count as 64-stackable when calculating the minecart slowdown. However if overstackedShulkerSignalStrength is enabled, reading the fill level will still output the overstacked value.
Setting this rule to false enables the functionality of this mod by removing the additional slowdown.
- Name:
overstackedMinecartSlowdown - Type:
boolean - Default:
true - Categories:
shulkerfix,feature,experimental - Since:
1.5
Client count fix
Fixes Carpet issue #1899,
where vanilla clients see stacked shulker boxes as single items inside containers.
- Name:
clientShulkerSync - Type:
boolean - Default:
false - Categories:
shulkerfix,bugfix,experimental - Since:
1.4
Project description from Modrinth.
Pick your setup
Stackable Shulkers Fix by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader buildShowing the newest 12 of 18 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Stackable Shulkers Fix versions and loaders
1.7.8
shulkerfix-1.7.8+26.2.jar
17 Jun 2026
1.7.8
shulkerfix-1.7.8+1.21.11.jar
17 Jun 2026
1.7.8
shulkerfix-1.7.8+1.21.10.jar
17 Jun 2026
1.7.8
shulkerfix-1.7.8+1.21.5.jar
17 Jun 2026
1.7.8
shulkerfix-1.7.8+1.20.5-1.21.4.jar
17 Jun 2026
1.7.7
shulkerfix-1.7.7+26.1.jar
2 Apr 2026
1.7.7
shulkerfix-1.7.7+1.21.11.jar
17 Dec 2025
1.7.6
shulkerfix-1.7.6+1.21.10.jar
27 Oct 2025
1.7.4
shulkerfix-1.7.4+1.21.5+.jar
21 Jun 2025
1.7.4
shulkerfix-1.7.4+1.20.5-1.21.4.jar
21 Jun 2025
1.7.3
shulkerfix-1.7.3+1.21.5+.jar
20 Jun 2025
1.7.3
shulkerfix-1.7.3+1.20.5-1.21.4.jar
20 Jun 2025
Looking for an older file? The official Modrinth project page is in Resources.