- Loaders
- Fabric
- Downloads on Modrinth
- 256
- Followers on Modrinth
- 4
- versions
- 10
- Updated
- February 13, 2026Feb 13
- Published
- in 2026
At a glance
Needed both in the game and on the server
State Machine Mod
With this mod you can build a deterministic finite-state machine in Minecraft.
The set of items (NOT ITEM STACKS) in your game is your alphabet. States are placed blocks. If a state is the current one of some state machine it will emit redstone signal.
Operations
- Create Transition: Hold an item in the offhand and any wrench (state machine tool) in the main hand, then right‑click two state blocks. The first clicked block is the source state, the second is the target state.
- Create Default Transition: Same as creating a transition, but with an empty offhand.
- Remove Transition: Hold an item in the offhand and use any wrench (state machine tool) to right‑click a state block whose transition you want to remove. If the offhand is empty, the default transition is removed.
- Set State Machine Block State: Right‑click a state machine block with any wrench (state machine tool), then right‑click the target state.
FAQ
How to install State Machine?
Install Fabric for your Minecraft version, download State Machine for the same version and loader, put the file into the mods folder and launch the game with the loader profile.
Which Minecraft versions does State Machine support?
State Machine has builds for Minecraft 1.20.1, 1.21.1, 1.21.8.
Is State Machine needed on the server?
Needed in the game and on the server