Orfby

But that wouldn't be client-side would it? I'd like it to just affect the person with the mod, so it works on all servers

Say for whatever reason I want to play a cat sound effect just to the client, how would I do that? I've seen PositionedSoundRecord var13 = new PositionedSoundRecord(new ResourceLocation("name"), 1, 1, x, y, z); in other projects, but I don't know what the name is for a cat sound and I'd also like it to not be based off of position.

I got the idea for it when I had Minecraft minimized and people wanted me, but I didn't know because I couldn't see it. After that I decided to make a simple mod for myself that sends a notification whenever someone says something in chat. The reason I called it chat notifier was because it did exactly that, notify me of chat. Your mod seems a little different to mine though because mine will send notifications (using system commands) when there is any message at all (which I plan on changing)

What event could I use for new messages in the client?

I made a mod (for personal use) that is supposed to create a notification when someone says something in a chat. This is my code: ChatNotifier.java: package com.notifier.chatnotifier; import net.minecraftforge.common.MinecraftForge; import net.minecraftforge.fml.common.FMLCommonHandler; import net.minecraftforge.fml.common.Mod; import net.minecraftforge.fml.common.Mod.EventHandler; import net.minecraftforge.fml.common.event.FMLPreInitializationEvent; @Mod(modid = ChatNotifier.MODID, version = ChatNotifier.VERSION) public class ChatNotifier { public static final String MODID = "Chat Notifier"; public static final String VERSION = "1.0"; ChatEventHandler handler = new ChatEventHandler(); @EventHandler public void preinit(FMLPreInitializationEvent event) { FMLCommonHandler.instance().bus().register(handler); MinecraftForge.EVENT_BUS.register(handler); } } ChatEventHandler.java: package com.notifier.chatnotifier; import java.io.IOException; import net.minecraftforge.event.ServerChatEvent; import net.minecraftforge.fml.common.eventhandler.SubscribeEvent; public class ChatEventHandler { @SubscribeEvent public void checkNormalChat(ServerChatEvent event) { try { Runtime.getRuntime().exec("notify-send " + event.username + " \"" + event.message + "\""); //Creates a notification (Linux only) } catch (IOException e) { e.printStackTrace(); } } } The mod works perfectly in singleplayer, but obviously the point of the mod is to create notifications in multiplayer. I've tested it on a completely vanilla server, and also in a craftbukkit server, and neither work.