v0.1.6: Hotbar Workspace, Visualization Overhaul, and Multi-Version Support

Axion v0.1.6 starts the new Alt hotbar workspace in a usable form.

This release focuses on staying in the normal hotbar while quickly swapping saved loadouts, previewing what each hotbar contains, and using the new overlay workflow without needing to move onto the Axion tool slot.

It also improves Paper server behavior in two important ways: Axion edits now respect GriefPrevention-style claims and /ignoreclaims, and no-clip movement stays properly synced while phasing so chunk loading and logout position behave correctly.

This version also includes a larger client compatibility and rendering pass: the preview/selection visuals have been reworked across tools, and Axion now ships maintained builds for Minecraft 1.21.8 through 1.21.11.

Highlights

• added the first real Alt hotbar workspace
• saved hotbars now have a visual overlay with paging
• hotbars can be selected by scrolling or clicking directly
• saved hotbar pages now grow dynamically instead of stopping after a fixed cap
• major preview and selection visualization improvements across move, clone, stack, smear, symmetry, and magic select
• improved ghost block previews, origin replacement visuals, and sparse/polygonal selection rendering
• Fabric client compatibility now covers Minecraft 1.21.8, 1.21.9, 1.21.10, and 1.21.11
• Axion now respects GriefPrevention and GP3D claims on Paper-backed edits
• Paper no-clip now stays server-synced while phasing through blocks

Visualization Improvements

The client rendering path received a broad compatibility and readability pass in v0.1.6.

This work focused on making tool previews easier to understand while also keeping them functional across multiple Minecraft minor versions where render APIs changed in incompatible ways.

That includes:

• improved selection and preview rendering for move, clone, stack, smear, extrude, and symmetry
• better sparse and polygonal visualization for magic select based workflows
• clearer origin replacement visuals during move operations
• improved ghost block rendering inside selection previews
• multiple compatibility fixes for world render callbacks, render layers, vertex helpers, HUD drawing, and other version-sensitive client shims

In practice, this means Axion previews are more consistent across tools and much more resilient to render API drift between supported versions.

Multi-Version Support

Axion v0.1.6 now explicitly supports Minecraft 1.21.8+ on the Fabric side.

Supported client targets:

• 1.21.8
• 1.21.9
• 1.21.10
• 1.21.11

This release includes the compatibility work needed to keep input hooks, world rendering hooks, keybinding setup, and preview rendering working across those versions instead of only targeting the newest patch line.

Release packaging has also been updated so each supported Minecraft version gets its own published Fabric mod jar and Paper plugin jar.

Saved Hotbars

Saved hotbars now feel much closer to a real workspace instead of a blind scroll-only switcher.

Current behavior:

• hold Alt while in the normal hotbar
• see the contents of the current saved hotbar page directly on screen
• scroll or click to choose a saved hotbar
• release Alt to commit that hotbar into your live hotbar
• the hotbar you were just using is automatically saved back into its previous slot

The overlay now includes:

• 9 visible hotbars at a time
• the live vanilla hotbar row reused as part of the page display
• page buttons for moving between saved hotbar pages
• automatic page growth when you scroll beyond the current end
• selection borders and cleaner row/slot visuals

Paper + Claims

On Paper servers with GriefPrevention-compatible claim protection, Axion edits now behave much more like normal protected building.

This has been hardened against both regular GriefPrevention and GP3D-style builds, so Axion no longer depends on one exact fork/version behaving the same way internally.

This includes:

• clone
• move
• stack
• smear
• erase
• infinite reach
• replace mode

When an edit would touch protected claim blocks and the player is not allowed to build there:

• the edit is not applied
• the preview remains in place
• GriefPrevention sends its normal denial message
• Axion shows a red action bar reminder to try again

If the player is using /ignoreclaims, Axion will respect that just like GriefPrevention normally does.

Paper + No Clip

Paper no-clip behavior has also been tightened up.

Before this fix, phasing through blocks on some servers could leave the client and server badly out of sync:

• chunks would stop loading properly
• the server would stop meaningfully advancing the player position
• rejoining could snap the player back toward an earlier location

Axion now keeps Paper no-clip movement properly server-synced while phasing, so:

• chunk loading continues normally
• server position stays in step with client movement
• logout and rejoin position behave much more predictably

Paper Note

There is still one known saved-hotbar limitation on multiplayer servers:

• written book data is not currently reliable across saved hotbar swaps on servers

In practice:

• singleplayer behaves much more consistently
• writable books and quills behave better
• signed written books are still the problematic case on servers

That limitation is being left as-is for now while the larger hotbar workspace continues moving forward.

What Comes Next

This is the first major piece of the broader v0.1.6 hotbar overlay plan.

Follow-up work for this release area still includes:

• capability toggles in the overlay
• flight speed slider
• offhand, destroy item, and gamemode buttons
• toolbox/settings entry
• update checker surface