Backbone
by Nerjal_Nosk
Backbone collects small server-side commands and a jigsaw placement option, Backbone's jigsaw rotation and entity discard features among them.
What it does
Backbone is a small utility mod for Fabric and NeoForge that groups a handful of minor features into one install. Its main additions are an extra set of arguments for the place jigsaw command, a forced-rotation option that fixes the direction of a placed piece, and a discard command that removes an entity from the world without the side effects of kill. The mod works alongside the structure block and the place command, so existing structure workflows keep their usual behavior.
The rotation option controls how a placed jigsaw piece turns. With the forced flag set to true, the piece takes the rotation that was given; otherwise the provided rotation is only one of several random variants. The discard command is used like kill, but it removes the target without triggering its death handling, which helps with entities added by other mods that do not die properly. The mod also adds only the math Mojang needs to place paintings and structures correctly, and it is released under the GNU General Public License v3.0 only; the source code and issue tracker are public.
Key features
Forced jigsaw rotation
A jigsaw placement can take a fixed rotation, so the piece faces the direction the command requests instead of a random variant.
Discard command
A discard command removes an entity from the world. It is used like kill but does not run the death handling, so entities that do not die properly can still be cleared.
Structure block compatibility
The jigsaw extension works with the structure block and the place command, so structures can be placed from either.
Painting and structure math
Only the math needed for proper paintings and structure placement is included, with no extra systems.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners and builders who run structure blocks, place commands or jigsaw placement on Fabric or NeoForge servers. Players need nothing installed.
How it compares
Prometheus is a Fabric and NeoForge mod for client and server with a custom license that is not open source, covering 1.21 – 26.2. ForcePlace is a Fabric-only mod for client and server, open source under the Apache License 2.0, and covers 1.21 – 1.21.4. More Structure Control is open source under the MIT License, runs on client and server, and targets Forge and NeoForge for 1.20.1 – 1.21.1, so it is the option for Forge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Backbone | Fabric and NeoForge | 1.21.1 – 1.21.4 | Server-side only | 2026-09-18 |
| Prometheus | Fabric and NeoForge | 1.21 – 26.2 | Client and server | 2026-10-10 |
| ForcePlace | Fabric | 1.21 – 1.21.4 | Client and server | 2025-01-23 |
| More Structure Control | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-05-28 |
Questions
Does Backbone need to be installed on the client?
Which loaders does Backbone support?
Does the forced rotation option change random placement?
In the catalog
Backbone is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 17,979 mods support Minecraft 1.21.4.
More from Nerjal_Nosk
Similar mods
What the author says
Small feature based incremental mods, grouping any small feature I believe could be neat to have and can implement in a relatively short time. From: A ShaiTheLamb request (see their Modrinth)
Official listing
- Modrinth page
- modrinth.com/mod/backbone
- Owner
- Nerjal_Nosk
- Published
- 2026-07-30
- Updated on Modrinth
- 2026-09-18
- Facts verified
- 2026-10-15