Obsidian Crystal Switcher (Fabric 26.2)

Client-side Fabric mod for Minecraft Java Edition 26.2.

What it does

When you successfully place obsidian while an End Crystal exists in hotbar slots 1-9, the mod switches your selected hotbar slot to the first End Crystal it finds.

It does not automatically place or attack crystals.

Requirements

• Minecraft Java Edition 26.2
• Fabric Loader 0.19.3 or newer
• Java 25

Fabric API is not required by this mod.

Build

This project targets Java 25. With JDK 25 and Gradle installed:

gradle build

The built mod will be in:

build/libs/obsidian-crystal-switcher-1.0.0.jar

Install

Place the built JAR in your .minecraft/mods folder and launch Minecraft 26.2 using Fabric Loader.

Multiplayer

The mod is client-side. After changing the selected slot it sends Minecraft's normal ServerboundSetCarriedItemPacket so the server receives the new carried hotbar slot.

Server rules vary; only use client-side mods where they are allowed.