Custom Stack Size Mod – Overview

This mod adjusts the maximum stack size of various items in Minecraft to improve inventory management and balance. It works with both vanilla and modded items, using flexible detection methods such as item tags and data components.

✨ Features

• Vanilla item adjustments
  Many vanilla items have their stack sizes changed to more practical values (e.g., boats stack to 8, totems to 8, potions to 16, beds to 16, etc.).

• Automatic detection of modded potions
  Any item that behaves like a potion (contains a PotionContents component) automatically gets a stack size of 16 – no extra configuration needed.

• Tag‑based support for modded items
  Mod authors can make their items follow the same rules by adding them to existing vanilla tags (e.g., #minecraft:beds, #minecraft:boats, #minecraft:skulls, #minecraft:buckets, #minecraft:creeper_drop_music_discs).

• Optional default rule for all modded items
  (Configurable) All non‑vanilla items can be assigned a default stack size (e.g., 64), with the possibility to exempt tools/armor via type checks.

🎯 Why this mod?

Vanilla Minecraft has inconsistent stack sizes for many items – some are limited to 1 or 16 for no obvious reason. This mod normalises them while respecting game balance:

Item Category	New Stack Size
Potions (all types)	16
Beds	16
Boats & Chest Boats	8
Minecarts	8
Totems of Undying	8
Heads	8
Music Discs	16
Buckets (all kinds)	16
Shields	4
Armor Stands	4
Elytra	8
Saddle	16

(Full list in the mod’s documentation)

🔌 Compatibility

• Fabric (Minecraft 1.21.11)
• Works with any mod that uses standard Minecraft systems (tags, components).
• For modded items to be recognised, they only need to be added to the appropriate vanilla tags – no special API required.

🛠️ Usage

Simply install the mod. No configuration is needed for the default behaviour.
If you want to change any stack size value, edit the config file (if provided by the mod) or modify the source code (the mod is open‑source).

📜 License

MIT – free to use, modify, and redistribute.

🙏 Credits

Inspired by the need for better inventory management and consistent item stacking rules.
Developed by Monkey.