MyPlugin.onEnable() {
    // 只注册ParentCommand
    CommandManager.INSTANCE.registerCommand(new ParentCommand(), false);
}

public class ParentCommand extends CompositeCommand {
    
    BilibiliCommand bilibiliCommand = new BilibiliCommand();
    WeiboiCommand weiboiCommand = new WeiboiCommand();

    public ParentCommand() {
        super("XX助手")
    }

    @SubCommand("查询b站动态")
    public void bilibiliCommandWork(CommandSender sender) {
        bilibiliCommand.work(sender);
    }

    @SubCommand("查询微博动态")
    public void weiboiCommandWork(CommandSender sender) {
        weiboiCommand.work(sender);
    }
}

// 其实可以不extends CompositeCommand, 因为不会注册到CommandManager
public class BilibiliCommand extends CompositeCommand {

    public BilibiliCommand() {
        // 无用的PrimaryName, 因为不会注册到CommandManager
        super("uselessName0")
    }

    // 其实可以不@SubCommand, 因为不会注册到CommandManager
    @SubCommand("查询b站动态")
    public void work(CommandSender sender) {
        // do something
    }
}

public class WeiboCommand extends CompositeCommand {

    public WeiboCommand() {
        super("uselessName1")
    }

    @SubCommand("查询微博动态")
    public void work(CommandSender sender) {
        // do something
    }
}