JoinCommandPlus
About
A first-join command execution plugin for Paper *.21.*. Executes configured commands when a player joins the server for the first time. Features include /jc add, /jc delete, /jc list, and /jc reload commands with jc.admin permission required. Supports placeholders for player name, UUID, display name, and world. Tracks joined players via persistent storage to prevent re-execution on subsequent joins.