Reden
by zly2006
Reden adds a Redstone Version Control system, plus undo and redo for block, entity and command changes, in Fabric and Quilt.
What it does
Reden tracks changes made to blocks, block entities and entities, and lets a player reverse the most recent operation with Ctrl+Z. Undo applies only to changes that the player caused, such as placing blocks or running commands. The mod also offers a set of debugging tools for server developers, including forced entity position sync, micro ticking and a way to disable the timeout for clients.
Its main system is RVC, a version control tool for redstone machines that stores machine history and diffs it with git. Machines can be published to a repository, linked to a GitHub account, and shared with other people. RVC also supports submodules and a package manager, so a builder can reuse machines made by others. Reden depends on Fabric API, Fabric Language Kotlin and MaLiLib, and it is released under the GNU General Public License v3.0 only, as open source. Files cover 1.20 – 1.21.8 on Fabric and Quilt.
Key features
Undo and redo
Ctrl+Z reverses the latest change the player made to blocks, block entities or entities.
Redstone Version Control
RVC stores the history of a redstone machine and shows differences between its versions, with git as the base.
Machine sharing
Machines can be uploaded to a GitHub repository and used by other players, with credit kept for each contributor.
Command hotkeys
Masa-style hotkeys can run commands, and a Super Right action is included in the hotkey set.
Compatibility
Latest build for each game version and loader.
1.21.x9 of 9 versions with builds
1.20.x4 of 4 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 3
Use cases
Who it’s for: Redstone builders who keep several versions of a machine, and server developers who need deterministic debugging tools. Players who only want simple undo can use a lighter mod.
How it compares
Build undo is a Fabric mod for 1.21.11, released under All rights reserved and not open source, and it runs on client and server. Undo is a Fabric and Quilt mod for 1.21.1 – 26.2 under a Creative Commons Attribution Non Commercial Share Alike 4.0 license, not open source, and it also runs on client and server. Reden covers 1.20 – 1.21.8 and is open source under the GNU General Public License v3.0 only. Ctrl+Z is an open source Fabric mod for 26.3 under the MIT License, and it is client-side only.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Reden | Fabric and Quilt | 1.20 – 1.21.8 | Client or server, optional | 2025-08-13 |
| Build undo | Fabric | 1.21.11 | Client and server | 2026-05-21 |
| Undo | Fabric and Quilt | 1.21.1 – 26.2 | Client and server | 2026-08-05 |
| Ctrl+Z | Fabric | 26.3 | Client-side only | 2026-10-14 |
Questions
Does Reden require Fabric API?
Does Reden have to be installed on the server?
Which game versions does Reden support on Quilt?
In the catalog
Reden is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 17,695 mods support Minecraft 1.21.8.
More from zly2006
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What the author says
Press Ctrl+Z to immediately undo the previous operation, making it much more convenient to develop redstone machines! For more information, please check our wiki page. All blocks, block entities and entities are undoable. Undo is available only if that change is caused by a player, for example, placing blocks and…
Official listing
- Modrinth page
- modrinth.com/mod/reden
- Owner
- zly2006
- Published
- 2023-08-16
- Updated on Modrinth
- 2025-08-13
- Facts verified
- 2026-10-15