PuppetPlayers

The mod adds a puppet command that operators can use after installing it. The join subcommand spawns a puppet at the position where a player last logged off, while spawn places one at a given position. The shadow subcommand makes a puppet join the place of an online player. Puppets are ticked in the correct tick phase, and their actions are simulated on the server.

Players can take over a puppet and leave their own body behind in the world, a feature called puppeteering. Puppeteering stays off until a server owner turns it on in the config file. While puppeteering, the player appears to other players as the puppet, and the original body resumes its position with its inventory once the player stops. Anything done through the puppet persists after stopping, and stats and advancements stay tied to the account. Because the account is still in use, someone can run a command that targets the player's name.

PuppetPlayers is a Fabric mod, released under the MIT License and open source. It runs on the server only, so players join without installing it. Files exist for 1.21.5 – 26.3, with 2.1.0+26.3 as the latest file. Fabric API and Fabric Language Kotlin are required.