Stackable Items 64 allows you to change the maximum stack size of items that normally cannot be stacked or have a limited stack size in Minecraft.
The mod supports configurable stack sizes for enchanted books, Totems of Undying, regular, splash, and lingering potions, boats, chest boats, all minecart variants, saddles, horse armor, music discs, banners, beds, empty shulker boxes, and any vanilla or modded item using its Registry ID.
Settings are available through a JSON configuration file and in-game commands. Changes are applied immediately without restarting the game or server and are automatically saved.
The mod only stacks completely identical items. Items with different enchantments, potion effects, durability, custom names, NBT, or Data Components will never stack together. Filled shulker boxes are not considered empty and do not use the empty shulker box category settings.
When combining identical enchanted books, the anvil processes them in batches. Vanilla enchanting mechanics and experience costs remain unchanged. The mod only adjusts the number of resulting books and the number of books consumed.
After the first launch, the following configuration file is created:
```text config/stackableitems64.json
