Height-Locked Mining

A client-side mod to help with digging.

Behavior

• The mod starts disabled.
• Press X + ] together to toggle it.
• While enabled, mining is allowed only on two horizontal block layers:
  1. the y layer directly in front of the player
  2. the layer immediately below it, representing the lower body.
• Attempts to mine the floor or any other Y layer are canceled.
• The two permitted layers are recalculated from the player's current eye position for every mining attempt.
• Toggling the mode cancels any currently progressing block break.

The ] part of the shortcut is available under Options → Controls → Key Binds → Height-Locked Mining. X is the fixed modifier for this mod.

Requirements

• Minecraft Java Edition 1.21.4
• Fabric Loader 0.16.10 or newer compatible release
• Fabric API for 1.21.4
• Java 21

The mod is client-only; it does not need to be installed on a multiplayer server.

Here's a video showcasing how the mod works: https://youtu.be/uXK5r0Y_8nc