Hiding commands from /[Tab] 1.13.1

In 1.12.2 PacketPlayOutTabComplete fired when this was done, but now it only fires when I'm putting in the arguments for the command.
How would I go about stopping the command list from popping up?



Edit:
I managed to find out what holds the commands, and found out that commands like /trigger have their permission set to null, which meant anyone could use it. I was able to modify via reflection to get the commands to not show up, problem is that now my own plugin's commands don't work.

Code:

CraftServer server = (CraftServer)Bukkit.getServer();

                HashMap<String,Command> hope =new HashMap<String,Command>();
                for(Command co : server.getCommandMap().getCommands())
                {
                    //co.testPermissionSilent(null);
                        if(co.getPermission() == null || co.getPermission().equals("null"))
                        {
                            co.setPermission("nada");
                        }
  
                        if(Arrays.asList(new String[] {"plugins","?","ver","version","help","me","trigger"}).contains(co.getName()))
                        {
                            co.setPermission("nada");
                        }
                        if(Arrays.asList(new String[] {"bukkit.command.help","minecraft.command.msg"}).contains(co.getPermission()))
                        {
                            co.setPermission("nada");
                        }
                  
                    hope.put(co.getName(), co);
                    Bukkit.getLogger().info("CMD: "+ co.getName() +"  " +co.getPermission() );
                }
              
                Field f = null;
                try {
                    f = SimpleCommandMap.class.getDeclaredField("knownCommands");
                } catch (NoSuchFieldException | SecurityException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
                if(f != null)
                {
                    f.setAccessible(true);
                    try {
                      
                        f.set(server.getCommandMap(),hope);
                        Bukkit.getLogger().info("Success!");
                      
                    } catch (IllegalArgumentException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    } catch (IllegalAccessException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }
                }

 

@awesomebutter234
For 1.13, there is a packet called Declare Command. This may be what controls what commands are shown:
https://wiki.vg/Protocol#Declare_Commands