Hotbar Block Shuffle

First release — everything included in v1.7.1

Core mechanic

• R key toggles the mode on/off (rebindable in Options → Controls)
• Every block placement randomly swaps whatever you're holding for a different block from your hotbar
• Works in any game mode — Creative and Survival alike

Stability

• Fixed inconsistent block swapping: added a network packet (ServerboundSetCarriedItemPacket) that syncs the client and server on which slot is selected — without it, the wrong block would sometimes get placed
• Placement detection reworked to reliably work in Creative mode too (where item count doesn't change on placement)

Feedback and UI

• On-screen badge in the bottom-right corner — shows while the mode is active
• Toggle sound (higher pitch when turning on, lower when turning off)
• Overlay message above the hotbar on toggle — green for "on", red for "off"

Visual style

• Custom mod icon — "BLOCK SHUFFLE" logo
• The activity badge went through a few iterations: from plain squares to a polished bordered panel with a soft shadow, matching the icon's style

Technical foundation

• Built from scratch for Minecraft 26.2 (official mappings, no legacy Yarn dependency)
• Fully client-side — nothing changes on the server

The original idea is a long-known building concept ("block shuffling"), independently implemented by a few different mods over the years. This implementation was written from scratch.