Stacknator

Stacknator is a lightweight Minecraft mod for Fabric that lets you customize the maximum stack size of any vanilla or modded item via a simple configuration file. By modifying item data components during game initialization, Stacknator delivers a clean, efficient solution without performance overhead or hacky workarounds.

Compatibility

• Required: Fabric API
• Vanilla Items: Fully compatible.
• Modded Items: Generally compatible with most mods.

Tags: Supported through the Filler feature.

Tip: To find an item's identifier, enable Advanced Tooltips in-game by pressing F3 + H, then hover over the item.

Installation

1. Drop the Stacknator .jar into your mods folder.
2. Start the server or load into a world.
3. Edit the stacknator.json config file to set your desired stack sizes.
4. Enjoy!

Required only on the server side for a survival gameplay, however it's recommended to have it on the client side as well to be fully compatible some screens (e.g. creative screen).

Documentation

enabled: Enables or disables the mod.
Type: boolean Default: true

log_modified_items:
Toggles logging of successful stack size changes (other logs always show).
Type: boolean Default: true

checks:
Defines the checks to be performed.
Type: object

• enable_checks:
  Enables or disables all checks.
  Type: boolean Default: true
• check_damageable:
  Enables or disables the damageable check.
  Type: boolean Default: true
• check_stackable:
  Enables or disables the stackable check.
  Type: boolean Default: false
• check_minimum_stack_size:
  Enables or disables the minimum stack size check.
  Type: boolean Default: true
• check_maximum_stack_size:
  Enables or disables the maximum stack size check.
  Type: boolean Default: true

remove_defaults:
Removes all item entries that match the default stack size.
Type: boolean Default: false

filler:
Defines the filler settings.
Type: object

• enable_filler:
  Enables or disables the filler. When enabled, the mod will iterate all registered items and apply the filler rules to each item while enforcing the configured checks.
  Type: boolean Default: false
• reset_stacks:
  Enables or disables resetting of stack sizes to the default values, overriding any defined custom stack size.
  Type: boolean Default: false
• run_once:
  Disables the filler after one run.
  Type: boolean Default: true
• tag_priority:
  Enables or disables prioritizing tags over item entries when applying the filler.
  Type: boolean Default: true
• tags:
  Defines tag identifiers and their custom stack sizes.
  Type: object Default: {}

sort_items:
Enables or disabled sorting the item entries alphabetically by their keys.
Type: boolean Default: true

items:
Defines item identifiers and their custom stack sizes.
Type: object Default: {}

Checks

Stacknator performs the following checks for each item/tag entry in the config file:

• Entry Key Format:
  Verifies if the entry key follows the namespace:item format.
  On Failure: Skips the entry.
• Item Damageable:
  Ensures the item is not damageable (e.g. tools, weapons and armor).
  On Failure: Skips the entry.
• Item Stackable:
  Confirms the item is stackable (default maximum stack above 1).
  On Failure: Skips the entry.
• Entry Value Below 1:
  Checks if the stack size is less than 1.
  On Failure: Skips the entry.
• Entry Value Above 99:
  Checks if the stack size exceeds 99.
  On Failure: Adjusts to 99.

Full Configuration Example

{ "enabled": true, "log_modified_items": true, "checks": { "enable_checks": true, "check_damageable": true, "check_stackable": false, "check_minimum_stack_size": true, "check_maximum_stack_size": true }, "remove_defaults": false, "filler": { "enable_filler": false, "reset_stacks": false, "run_once": true, "tag_priority": true, "tags": { "#minecraft:logs": 16, "#minecraft:planks": 32 } }, "sort_items": true, "items": { "minecraft:egg": 64, "minecraft:red_bed": 16, "minecraft:ender_pearl": 32, "minecraft:tnt": 1 } }