schematicPlacer

Client-side Fabric mod that places .schematic, .schem, and .litematic files in-game.

Requirements

• Fabric Loader 0.19.3+ and Fabric API 0.129.0+ for Minecraft 1.21.7
• Anti-cheat fully disabled — this mod sends non-vanilla packets. Tested with im-fast.
• Custom /i command on the server — the mod runs /i <blockname> for every block. Your server must have a command that gives items by name.
• Creative-mode-like abilities on the server (no block placement restrictions).

Installation

1. Install Fabric Loader and Fabric API for 1.21.7.
2. Put the mod jar in your mods/ folder.
3. Place schematic files (.schematic, .schem, or .litematic) in a schematics/ folder next to your Minecraft run directory (the same folder that contains mods/).

Usage

All commands are client-side — type them in chat.

/placeOutSchematic <filename> <ox> <oy> <oz>

Places a schematic in the world. The filename is relative to the schematics/ folder (include the extension).

• <filename> — path inside schematics/, include the extension, e.g. mybuild.schematic
• <ox> <oy> <oz> — world coordinates where the schematic origin goes

Supported formats: .schematic, .schem, .litematic

Example: /placeOutSchematic house.schem 100 64 200

/stopPlaceOut

Stops the current placement. The loop halts before the next block.

/tpc <x> <y> <z>

Teleports you to the given coordinates (client and server).

/helloworld

Test command — prints "Hello, World!" if the mod is loaded.

Schematic files

Place schematic files in a schematics/ folder next to your Minecraft run directory:

<run-directory>/
├── schematics/
│   ├── mybuild.schematic       # Schematica format
│   ├── mybuild.schem           # Sponge format
│   └── mybuild.litematic       # Litematica format
├── mods/
│   └── schematicplacer-x.x.x.jar
└── ...

Notes

• Blocks already matching the schematic are skipped — safe to run again over a partially placed build.
• The mod does not manage your inventory. The server's /i command is responsible for giving you the correct blocks.
• Only tested with anti-cheat fully disabled.