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Requirements

The exact loader, Java and Minecraft versions InputBooster 4.1.2-alpha supports, and how to check what you have.

2 min readInputBooster 4.1.2-alphaMinecraft 26.2 / 26.3

InputBooster 4.1.2-alpha needs Java 25, a Fabric or NeoForge client, and Minecraft 26.2 or 26.3. There is no build for any other Minecraft version in this source tree.

The short version

RequirementValue
Java25
Minecraft26.2 (Fabric, NeoForge) or 26.3 (Fabric only)
LoaderFabric Loader 0.19.0+ and Fabric API 0.161.0+, or NeoForge 26.2.0.88+
SideClient only
Mod loader installExactly one InputBooster jar

Java 25

The mixin manifest declares compatibilityLevel: JAVA_25, and the Fabric fabric.mod.json requires "java": ">=25". A Java 21 runtime cannot load the mod.

To confirm which Java a launcher uses, look at the launcher's version or profile panel, or run a command in the folder that contains the launcher:

Verify your default Java
$ java -version

Minecraft versions

Only two Minecraft versions are built from this tree:

MinecraftFabric jarNeoForge jar
26.2inputbooster-4.1.2-alpha-fabric-mc262.jarinputbooster-4.1.2-alpha-nf-mc262.jar
26.3inputbooster-4.1.2-alpha-fabric-mc263.jar—

There is no NeoForge build for 26.3. The NeoForge build targets Minecraft 26.2 through the neoforge.mods.toml dependency range [26.2,26.3).

Fabric requirements

The Fabric build declares these dependencies:

json
"depends": {
  "fabricloader": ">=0.19.0",
  "fabric-api": ">=0.161.0",
  "minecraft": ">=26.3 <26.4",
  "java": ">=25"
}

The 26.2 jar replaces the Minecraft range with >=26.2 <26.3.

Fabric API is a hard dependency. The mod does not ship a Fabric API implementation, and the platform entrypoint registers key mappings through the loader API.

NeoForge requirements

The NeoForge build requires neoforge [26.2.0.88,) and minecraft [26.2,26.3). NeoForge bundles the loader, so there is no separate Fabric API requirement. The mod is declared side="CLIENT".

Checking what you have

Before installing, confirm three things:

  1. The Minecraft version in your launcher matches the jar's mc262 or mc263 suffix.
  2. Your loader version is new enough for the table above.
  3. Your Java is 25.

The jar matrix page maps every published jar to its version range, and installing covers the actual file placement.

What you do not need

  • A server-side install. The mod is client only. A server does not install it, does not need a plugin for it, and cannot see it.
  • Fabric API on NeoForge. Not applicable.
  • A separate API mod. The public API repository is archived and is not wired into 26.x. See archived API.