Roguecraft is an awesome datapack you can find on modrinth by MonoCode. The datapack has some issues with players leaving and joining while a game is in session. This plugin helps to address those issues by tracking if a run of Roguecraft is currently in progress and setting the state for users correctly as they join:

• If a run is already in progress and a user is not part of the run, they will be set to spectator mode.
• If a run is not in progress, but a user is not in the Roguecraft Hub, they will be moved there.

Installation
Assumption: That the world is only running the roguecraft datapack.

1. Install the Roguecraft datapack and resource pack.
2. Copy this plugin's jar file into your spigot plugins folder.

Note: Tested with Roguecraft 1.0.5.