From 368b0c392310563e70a7c40ec3f077d2fd652a96 Mon Sep 17 00:00:00 2001
From: Acuadragon100 <30689683+Acuadragon100@users.noreply.github.com>
Date: Mon, 30 Mar 2026 17:18:48 +0200
Subject: [PATCH] Add ability to disable vanilla client rejection completely.

---
 .../java/net/minecraftforge/network/NetworkRegistry.java  | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/main/java/net/minecraftforge/network/NetworkRegistry.java b/src/main/java/net/minecraftforge/network/NetworkRegistry.java
index 3dfabbc8927..4c5beb1dbc8 100644
--- a/src/main/java/net/minecraftforge/network/NetworkRegistry.java
+++ b/src/main/java/net/minecraftforge/network/NetworkRegistry.java
@@ -26,6 +26,7 @@
 import java.util.Optional;
 import java.util.Set;
 import java.util.HashSet;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.BiFunction;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
@@ -39,6 +40,8 @@ public class NetworkRegistry
     private static final Logger LOGGER = LogManager.getLogger();
     private static final Marker NETREGISTRY = MarkerManager.getMarker("NETREGISTRY");
 
+    private static final AtomicBoolean kilt$acceptsVanillaConnections = new AtomicBoolean(false);
+
     private static Map<ResourceLocation, NetworkInstance> instances = Collections.synchronizedMap(new HashMap<>());
 
     /**
@@ -79,7 +82,12 @@ public static List<String> getClientNonVanillaNetworkMods()
         return listRejectedVanillaMods(NetworkInstance::tryServerVersionOnClient);
     }
 
+    public static void kilt$enableVanillaConnections() {
+        kilt$acceptsVanillaConnections.set(true);
+    }
+
     public static boolean acceptsVanillaClientConnections() {
+        if (kilt$acceptsVanillaConnections.get()) return true;
         return (instances.isEmpty() || getServerNonVanillaNetworkMods().isEmpty()) && DataPackRegistriesHooks.getSyncedCustomRegistries().isEmpty();
     }