How to Create Custom Stack Groups Using a Resource Pack

If you want to organize custom items or alter built-in groups, you can define your own grouping rules using simple JSON files inside a standard Minecraft resource pack.

Adding Custom Group JSONs

1. Open your Minecraft directory and navigate to the resourcepacks folder.

2. Create a new resource pack folder (or open an existing custom pack) containing a valid pack.mcmeta file.

3. Inside your pack, create JSON files to define the item groups you want to bundle together.

4. Add entries for special categories that you want to condense on your sidebar, such as different types of fluids or custom status effects.

5. Save your JSON files and enable the pack in the in-game Resource Packs menu.

Disabling Default Groups

Resource pack JSONs can also modify how default items behave:

• If you dislike having certain categories combined, use your resource pack files to turn off default built-in groups.
• For example, you can selectively disable the grouping of spawn eggs so that every egg shows up independently in the sidebar while keeping other groups like tools or copper blocks collapsed.