Modpack Checker

A lightweight Fabric mod to verify that players use the correct modpack version on your server.

Features

• Simple version-based client-server check (no modlist comparison)
• Automatic disconnect with helpful messages
• Easy-to-edit TOML config files for both client and server
• /reload support to apply changes without restarting
• Dev mode: use version 0.0.0 to disable checks during development

How It Works

1. Server sends a version check during login
2. Client replies with the version from modpack-checker-client.toml
3. Server compares it to its expected version
4. If mismatched, the player is kicked with a custom message

Configuration

Server (config/modpack-checker-server.toml):

enable = true
expected_version = "1.0.0"
[messages]
no_mod = "Please install the Modpack: <your-modpack-link>"
wrong_version = "Please install modpack version {version}: <your-modpack-link+version>"
server_error = "Server configuration error. Please contact an administrator." 

Client (config/modpack-checker-client.toml):

version = "1.0.0"