From d6cdaad5f93de6845ee315de44fa9ac454d81c30 Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 29 Nov 2025 21:40:54 -0500
Subject: [PATCH 01/13] Reimplement `IRecipeTransferReceiver`

---
 .../gregtech/api/mui/GregTechGuiScreen.java   | 82 ++++++++++++++++++-
 .../api/mui/IRecipeTransferReceiver.java      | 66 +++++++++++++++
 .../jei/JustEnoughItemsModule.java            |  4 +
 3 files changed, 151 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java

diff --git a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
index ad5c48449c5..a5051ffd2ec 100644
--- a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
+++ b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
@@ -1,15 +1,31 @@
 package gregtech.api.mui;
 
 import gregtech.api.GTValues;
+import gregtech.integration.jei.JustEnoughItemsModule;
 
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 
+import com.cleanroommc.modularui.integration.recipeviewer.RecipeViewerRecipeTransferHandler;
 import com.cleanroommc.modularui.screen.ModularPanel;
 import com.cleanroommc.modularui.screen.ModularScreen;
+import it.unimi.dsi.fastutil.ints.Int2ObjectAVLTreeMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import it.unimi.dsi.fastutil.ints.IntComparators;
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import mezz.jei.api.gui.IRecipeLayout;
+import mezz.jei.api.recipe.transfer.IRecipeTransferError;
+import org.jetbrains.annotations.NotNull;
 
+import java.util.Map;
+
+@SuppressWarnings("UnstableApiUsage")
 @SideOnly(Side.CLIENT)
-public class GregTechGuiScreen extends ModularScreen {
+public class GregTechGuiScreen extends ModularScreen implements RecipeViewerRecipeTransferHandler {
+
+    // Stores lists of higher priority recipe receivers to the left of the tree
+    private final Int2ObjectMap<Map<String, IRecipeTransferReceiver>> registeredRecipeTransferReceivers = new Int2ObjectAVLTreeMap<>(
+            IntComparators.OPPOSITE_COMPARATOR);
 
     public GregTechGuiScreen(ModularPanel mainPanel) {
         this(mainPanel, GTGuiTheme.STANDARD);
@@ -27,4 +43,68 @@ public GregTechGuiScreen(String owner, ModularPanel mainPanel, String themeId) {
         super(owner, mainPanel);
         useTheme(themeId);
     }
+
+    @Override
+    public IRecipeTransferError transferRecipe(IRecipeLayout recipeLayout, boolean maxTransfer, boolean simulate) {
+        // Receivers are sorted high to low on registration
+        for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
+            for (IRecipeTransferReceiver receiver : subMap.values()) {
+                IRecipeTransferError result = receiver.receiveRecipe(recipeLayout, maxTransfer, simulate);
+                if (result == IRecipeTransferReceiver.SKIP) continue;
+                return result;
+            }
+        }
+
+        // No valid transfer handler was found
+        return JustEnoughItemsModule.transferHelper.createInternalError();
+    }
+
+    /**
+     * Register an {@link IRecipeTransferReceiver} to this screen. <br/>
+     * Recipe transfer handlers registered through this method will have a priority of {@code 0}. <br/>
+     * <b>Important:</b> if you have dynamic widgets or sync handlers, ensure that you remove this handler with
+     * {@link #removeRecipeTransferHandler(String)} when it's disposed of!
+     * 
+     * @throws IllegalArgumentException if a receiver with the given key already exists.
+     */
+    public void registerRecipeTransferHandler(@NotNull IRecipeTransferReceiver transferReceiver, @NotNull String key) {
+        registerRecipeTransferHandler(transferReceiver, key, 0);
+    }
+
+    /**
+     * Register an {@link IRecipeTransferReceiver} to this screen with a certain priority. Higher numbers will be tried
+     * first. <br/>
+     * <b>Important:</b> if you have dynamic widgets or sync handlers, ensure that you remove this handler with
+     * {@link #removeRecipeTransferHandler(String)} when it's disposed of!
+     * 
+     * @throws IllegalArgumentException if a receiver with the given key already exists.
+     */
+    public void registerRecipeTransferHandler(@NotNull IRecipeTransferReceiver transferReceiver, @NotNull String key,
+                                              int priority) {
+        for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
+            if (subMap.containsKey(key)) {
+                throw new IllegalArgumentException(
+                        "Tried to register a recipe transfer receiver to a key that's already used!");
+            }
+        }
+
+        registeredRecipeTransferReceivers.computeIfAbsent(priority, $ -> new Object2ObjectOpenHashMap<>())
+                .put(key, transferReceiver);
+    }
+
+    /**
+     * Remove a registered {@link IRecipeTransferReceiver} from this screen.
+     * 
+     * @throws IllegalArgumentException if no receiver exists with the given key.
+     */
+    public void removeRecipeTransferHandler(@NotNull String key) {
+        for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
+            if (subMap.containsKey(key)) {
+                subMap.remove(key);
+                return;
+            }
+        }
+
+        throw new IllegalArgumentException("Tried to remove a recipe transfer receiver by a key that didn't exist!");
+    }
 }
diff --git a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
new file mode 100644
index 00000000000..259a25b5490
--- /dev/null
+++ b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
@@ -0,0 +1,66 @@
+package gregtech.api.mui;
+
+import gregtech.integration.jei.JustEnoughItemsModule;
+
+import net.minecraft.client.Minecraft;
+import net.minecraftforge.fml.relauncher.Side;
+import net.minecraftforge.fml.relauncher.SideOnly;
+
+import com.cleanroommc.modularui.value.sync.SyncHandler;
+import com.cleanroommc.modularui.widget.Widget;
+import mezz.jei.api.gui.IRecipeLayout;
+import mezz.jei.api.recipe.transfer.IRecipeTransferError;
+import mezz.jei.api.recipe.transfer.IRecipeTransferHandlerHelper;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+/**
+ * An interface for receiving a recipe from a recipe viewer to anything on the panel, such as a {@link Widget} or
+ * {@link SyncHandler}. <br/>
+ * Register it via {@link GregTechGuiScreen#registerRecipeTransferHandler(IRecipeTransferReceiver, String)} or
+ * {@link GregTechGuiScreen#registerRecipeTransferHandler(IRecipeTransferReceiver, String, int)} if you want to
+ * prioritize checking a certain handler first.
+ */
+public interface IRecipeTransferReceiver {
+
+    IRecipeTransferError SKIP = new IRecipeTransferError() {
+
+        @Override
+        public @NotNull Type getType() {
+            return Type.INTERNAL;
+        }
+
+        @Override
+        public void showError(@NotNull Minecraft minecraft, int mouseX, int mouseY, @NotNull IRecipeLayout recipeLayout,
+                              int recipeX,
+                              int recipeY) {
+            // NO-OP
+        }
+    };
+
+    /**
+     * Attempt or simulate transferring a recipe from a recipe viewer like JEI or HEI. <br/>
+     * A factory for default {@link IRecipeTransferError}s is available at {@link JustEnoughItemsModule#transferHelper}.
+     * There are three default options for errors. <br/>
+     * - {@link IRecipeTransferHandlerHelper#createInternalError()}: mark the recipe as invalid for transferring by
+     * graying out the + button. <br/>
+     * - {@link IRecipeTransferHandlerHelper#createUserErrorWithTooltip(String)}: the same as above, but also display a
+     * message when hovering over the + button. <br/>
+     * - {@link IRecipeTransferHandlerHelper#createUserErrorForSlots(String, Collection)}: the same as above, but
+     * additionally highlight certain slots in the recipe to, for example, mark missing ingredients. Important: will
+     * throw {@link IllegalArgumentException} if the supplied {@link Collection} is empty! <br/>
+     * If you have multiple receivers on your panel and want to indicate that this receiver should be skipped and the
+     * next receiver in order should be tried, return {@link #SKIP}!
+     * 
+     * @param recipeLayout the recipe layout that contains the recipe category, and the item and fluid stacks.
+     * @param maxTransfer  if the receiver should try to move as many ingredients as possible to the crafting slots, ie
+     *                     a crafting table.
+     * @param simulate     if this recipe should only simulate being transferred
+     * @return {@code null} if the transfer should succeed or a {@link IRecipeTransferError} if not.
+     */
+    @Nullable
+    @SideOnly(Side.CLIENT)
+    IRecipeTransferError receiveRecipe(@NotNull IRecipeLayout recipeLayout, boolean maxTransfer, boolean simulate);
+}
diff --git a/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java b/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java
index 7772e0ada44..75c424483b4 100644
--- a/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java
+++ b/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java
@@ -74,6 +74,7 @@
 import mezz.jei.api.recipe.IRecipeCategory;
 import mezz.jei.api.recipe.IRecipeCategoryRegistration;
 import mezz.jei.api.recipe.VanillaRecipeCategoryUid;
+import mezz.jei.api.recipe.transfer.IRecipeTransferHandlerHelper;
 import mezz.jei.config.Constants;
 import mezz.jei.input.IShowsRecipeFocuses;
 import mezz.jei.input.InputHandler;
@@ -105,6 +106,7 @@ public class JustEnoughItemsModule extends IntegrationSubmodule implements IModP
     public static IIngredientRegistry ingredientRegistry;
     public static IJeiRuntime jeiRuntime;
     public static IGuiHelper guiHelper;
+    public static IRecipeTransferHandlerHelper transferHelper;
 
     @Override
     public void loadComplete(FMLLoadCompleteEvent event) {
@@ -331,6 +333,8 @@ public void register(IModRegistry registry) {
 
         // Refresh Ore Ingredients Cache
         GTRecipeOreInput.refreshStackCache();
+
+        transferHelper = jeiHelpers.recipeTransferHandlerHelper();
     }
 
     private void setupInputHandler() {

From 93917c3e824ae374247d1bc6c3ff33b4f2a3a520 Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 29 Nov 2025 22:48:11 -0500
Subject: [PATCH 02/13] skip on any internal error

---
 .../gregtech/api/mui/GregTechGuiScreen.java   |  2 +-
 .../api/mui/IRecipeTransferReceiver.java      | 25 +++----------------
 2 files changed, 5 insertions(+), 22 deletions(-)

diff --git a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
index a5051ffd2ec..7614fac2b0b 100644
--- a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
+++ b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
@@ -50,7 +50,7 @@ public IRecipeTransferError transferRecipe(IRecipeLayout recipeLayout, boolean m
         for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
             for (IRecipeTransferReceiver receiver : subMap.values()) {
                 IRecipeTransferError result = receiver.receiveRecipe(recipeLayout, maxTransfer, simulate);
-                if (result == IRecipeTransferReceiver.SKIP) continue;
+                if (result != null && result.getType() == IRecipeTransferError.Type.INTERNAL) continue;
                 return result;
             }
         }
diff --git a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
index 259a25b5490..bf7280273ef 100644
--- a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
+++ b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
@@ -2,7 +2,6 @@
 
 import gregtech.integration.jei.JustEnoughItemsModule;
 
-import net.minecraft.client.Minecraft;
 import net.minecraftforge.fml.relauncher.Side;
 import net.minecraftforge.fml.relauncher.SideOnly;
 
@@ -25,34 +24,18 @@
  */
 public interface IRecipeTransferReceiver {
 
-    IRecipeTransferError SKIP = new IRecipeTransferError() {
-
-        @Override
-        public @NotNull Type getType() {
-            return Type.INTERNAL;
-        }
-
-        @Override
-        public void showError(@NotNull Minecraft minecraft, int mouseX, int mouseY, @NotNull IRecipeLayout recipeLayout,
-                              int recipeX,
-                              int recipeY) {
-            // NO-OP
-        }
-    };
-
     /**
      * Attempt or simulate transferring a recipe from a recipe viewer like JEI or HEI. <br/>
      * A factory for default {@link IRecipeTransferError}s is available at {@link JustEnoughItemsModule#transferHelper}.
-     * There are three default options for errors. <br/>
+     * There are three default options for errors: <br/>
      * - {@link IRecipeTransferHandlerHelper#createInternalError()}: mark the recipe as invalid for transferring by
-     * graying out the + button. <br/>
+     * graying out the + button. If there are multiple registered recipe transfer receivers on the same panel, returning
+     * an internal error will skip this receiver and try the others. <br/>
      * - {@link IRecipeTransferHandlerHelper#createUserErrorWithTooltip(String)}: the same as above, but also display a
      * message when hovering over the + button. <br/>
      * - {@link IRecipeTransferHandlerHelper#createUserErrorForSlots(String, Collection)}: the same as above, but
      * additionally highlight certain slots in the recipe to, for example, mark missing ingredients. Important: will
-     * throw {@link IllegalArgumentException} if the supplied {@link Collection} is empty! <br/>
-     * If you have multiple receivers on your panel and want to indicate that this receiver should be skipped and the
-     * next receiver in order should be tried, return {@link #SKIP}!
+     * throw {@link IllegalArgumentException} if the supplied {@link Collection} is empty!
      * 
      * @param recipeLayout the recipe layout that contains the recipe category, and the item and fluid stacks.
      * @param maxTransfer  if the receiver should try to move as many ingredients as possible to the crafting slots, ie

From 01078888a3160cae0078917e577d49978dce361f Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 29 Nov 2025 23:25:28 -0500
Subject: [PATCH 03/13] Add RecipeTransferSyncHandler

---
 .../gregtech/api/mui/GregTechGuiScreen.java   | 39 +++++++++++++------
 .../api/mui/IRecipeTransferReceiver.java      |  9 +++--
 .../mui/sync/RecipeTransferSyncHandler.java   | 36 +++++++++++++++++
 3 files changed, 69 insertions(+), 15 deletions(-)
 create mode 100644 src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java

diff --git a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
index 7614fac2b0b..85dcf63636d 100644
--- a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
+++ b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
@@ -9,10 +9,12 @@
 import com.cleanroommc.modularui.integration.recipeviewer.RecipeViewerRecipeTransferHandler;
 import com.cleanroommc.modularui.screen.ModularPanel;
 import com.cleanroommc.modularui.screen.ModularScreen;
+import com.cleanroommc.modularui.value.sync.SyncHandler;
+import com.cleanroommc.modularui.widget.Widget;
 import it.unimi.dsi.fastutil.ints.Int2ObjectAVLTreeMap;
 import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
 import it.unimi.dsi.fastutil.ints.IntComparators;
-import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Object2ReferenceOpenHashMap;
 import mezz.jei.api.gui.IRecipeLayout;
 import mezz.jei.api.recipe.transfer.IRecipeTransferError;
 import org.jetbrains.annotations.NotNull;
@@ -24,7 +26,7 @@
 public class GregTechGuiScreen extends ModularScreen implements RecipeViewerRecipeTransferHandler {
 
     // Stores lists of higher priority recipe receivers to the left of the tree
-    private final Int2ObjectMap<Map<String, IRecipeTransferReceiver>> registeredRecipeTransferReceivers = new Int2ObjectAVLTreeMap<>(
+    private static final Int2ObjectMap<Map<String, IRecipeTransferReceiver>> registeredRecipeTransferReceivers = new Int2ObjectAVLTreeMap<>(
             IntComparators.OPPOSITE_COMPARATOR);
 
     public GregTechGuiScreen(ModularPanel mainPanel) {
@@ -44,6 +46,11 @@ public GregTechGuiScreen(String owner, ModularPanel mainPanel, String themeId) {
         useTheme(themeId);
     }
 
+    @Override
+    public void onClose() {
+        registeredRecipeTransferReceivers.clear();
+    }
+
     @Override
     public IRecipeTransferError transferRecipe(IRecipeLayout recipeLayout, boolean maxTransfer, boolean simulate) {
         // Receivers are sorted high to low on registration
@@ -62,25 +69,31 @@ public IRecipeTransferError transferRecipe(IRecipeLayout recipeLayout, boolean m
     /**
      * Register an {@link IRecipeTransferReceiver} to this screen. <br/>
      * Recipe transfer handlers registered through this method will have a priority of {@code 0}. <br/>
-     * <b>Important:</b> if you have dynamic widgets or sync handlers, ensure that you remove this handler with
-     * {@link #removeRecipeTransferHandler(String)} when it's disposed of!
+     * <b>Important:</b> ensure that you remove this handler with {@link #removeRecipeTransferHandler(String)} when it's
+     * disposed of! <br/>
+     * Remove it by calling {@link #removeRecipeTransferHandler(String)} from {@link Widget#dispose()} for widgets and
+     * {@link SyncHandler#dispose()} for sync handlers.
      * 
      * @throws IllegalArgumentException if a receiver with the given key already exists.
      */
-    public void registerRecipeTransferHandler(@NotNull IRecipeTransferReceiver transferReceiver, @NotNull String key) {
-        registerRecipeTransferHandler(transferReceiver, key, 0);
+    public static void registerRecipeTransferHandler(@NotNull String key,
+                                                     @NotNull IRecipeTransferReceiver transferReceiver) {
+        registerRecipeTransferHandler(key, transferReceiver, 0);
     }
 
     /**
      * Register an {@link IRecipeTransferReceiver} to this screen with a certain priority. Higher numbers will be tried
      * first. <br/>
-     * <b>Important:</b> if you have dynamic widgets or sync handlers, ensure that you remove this handler with
-     * {@link #removeRecipeTransferHandler(String)} when it's disposed of!
+     * <b>Important:</b> ensure that you remove this handler with {@link #removeRecipeTransferHandler(String)} when it's
+     * disposed of! <br/>
+     * Remove it by calling {@link #removeRecipeTransferHandler(String)} from {@link Widget#dispose()} for widgets and
+     * {@link SyncHandler#dispose()} for sync handlers.
      * 
      * @throws IllegalArgumentException if a receiver with the given key already exists.
      */
-    public void registerRecipeTransferHandler(@NotNull IRecipeTransferReceiver transferReceiver, @NotNull String key,
-                                              int priority) {
+    public static void registerRecipeTransferHandler(@NotNull String key,
+                                                     @NotNull IRecipeTransferReceiver transferReceiver,
+                                                     int priority) {
         for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
             if (subMap.containsKey(key)) {
                 throw new IllegalArgumentException(
@@ -88,7 +101,9 @@ public void registerRecipeTransferHandler(@NotNull IRecipeTransferReceiver trans
             }
         }
 
-        registeredRecipeTransferReceivers.computeIfAbsent(priority, $ -> new Object2ObjectOpenHashMap<>())
+        // Reference map so the receiver might:tm: not stick around for too long if someone forgets to unregister their
+        // receiver.
+        registeredRecipeTransferReceivers.computeIfAbsent(priority, $ -> new Object2ReferenceOpenHashMap<>())
                 .put(key, transferReceiver);
     }
 
@@ -97,7 +112,7 @@ public void registerRecipeTransferHandler(@NotNull IRecipeTransferReceiver trans
      * 
      * @throws IllegalArgumentException if no receiver exists with the given key.
      */
-    public void removeRecipeTransferHandler(@NotNull String key) {
+    public static void removeRecipeTransferHandler(@NotNull String key) {
         for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
             if (subMap.containsKey(key)) {
                 subMap.remove(key);
diff --git a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
index bf7280273ef..6137d4037f6 100644
--- a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
+++ b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
@@ -1,5 +1,6 @@
 package gregtech.api.mui;
 
+import gregtech.api.mui.sync.RecipeTransferSyncHandler;
 import gregtech.integration.jei.JustEnoughItemsModule;
 
 import net.minecraftforge.fml.relauncher.Side;
@@ -18,9 +19,11 @@
 /**
  * An interface for receiving a recipe from a recipe viewer to anything on the panel, such as a {@link Widget} or
  * {@link SyncHandler}. <br/>
- * Register it via {@link GregTechGuiScreen#registerRecipeTransferHandler(IRecipeTransferReceiver, String)} or
- * {@link GregTechGuiScreen#registerRecipeTransferHandler(IRecipeTransferReceiver, String, int)} if you want to
- * prioritize checking a certain handler first.
+ * Register it via {@link GregTechGuiScreen#registerRecipeTransferHandler(String, IRecipeTransferReceiver)} or
+ * {@link GregTechGuiScreen#registerRecipeTransferHandler(String, IRecipeTransferReceiver, int)} if you want to
+ * prioritize checking a certain handler first. <br/>
+ * If you're implementing this on a {@link SyncHandler}, it's recommended to extend {@link RecipeTransferSyncHandler} so
+ * registering and unregistering from {@link GregTechGuiScreen} is done for you.
  */
 public interface IRecipeTransferReceiver {
 
diff --git a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
new file mode 100644
index 00000000000..53da6eecdf3
--- /dev/null
+++ b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
@@ -0,0 +1,36 @@
+package gregtech.api.mui.sync;
+
+import gregtech.api.mui.GregTechGuiScreen;
+import gregtech.api.mui.IRecipeTransferReceiver;
+
+import com.cleanroommc.modularui.value.sync.PanelSyncManager;
+import com.cleanroommc.modularui.value.sync.SyncHandler;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.MustBeInvokedByOverriders;
+
+/**
+ * A base class for to handle implementing {@link IRecipeTransferReceiver} on a {@link SyncHandler}s to automatically
+ * register and unregister it from the map of valid handlers in {@link GregTechGuiScreen}.
+ */
+public abstract class RecipeTransferSyncHandler extends SyncHandler implements IRecipeTransferReceiver {
+
+    @ApiStatus.OverrideOnly
+    @MustBeInvokedByOverriders
+    @Override
+    public void init(String key, PanelSyncManager syncManager) {
+        super.init(key, syncManager);
+        GregTechGuiScreen.registerRecipeTransferHandler(getKey(), this, getTransferHandlerPriority());
+    }
+
+    protected int getTransferHandlerPriority() {
+        return 0;
+    }
+
+    @ApiStatus.OverrideOnly
+    @MustBeInvokedByOverriders
+    @Override
+    public void dispose() {
+        GregTechGuiScreen.removeRecipeTransferHandler(getKey());
+        super.dispose();
+    }
+}

From b8d6a3aa3bbd753c111806c8b2a80b5c5a72a07a Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 29 Nov 2025 23:55:52 -0500
Subject: [PATCH 04/13] Refactor CraftingRecipeLogic to use
 RecipeTransferSyncHandler

---
 .../api/mui/GregTechGuiTransferHandler.java   | 69 -------------------
 .../storage/CraftingRecipeLogic.java          | 44 +++++++++++-
 .../storage/MetaTileEntityWorkbench.java      |  2 +-
 .../jei/JustEnoughItemsModule.java            |  5 --
 4 files changed, 43 insertions(+), 77 deletions(-)
 delete mode 100644 src/main/java/gregtech/api/mui/GregTechGuiTransferHandler.java

diff --git a/src/main/java/gregtech/api/mui/GregTechGuiTransferHandler.java b/src/main/java/gregtech/api/mui/GregTechGuiTransferHandler.java
deleted file mode 100644
index 9332b8a9a70..00000000000
--- a/src/main/java/gregtech/api/mui/GregTechGuiTransferHandler.java
+++ /dev/null
@@ -1,69 +0,0 @@
-package gregtech.api.mui;
-
-import gregtech.api.mui.sync.PagedWidgetSyncHandler;
-import gregtech.common.metatileentities.storage.CraftingRecipeLogic;
-
-import net.minecraft.entity.player.EntityPlayer;
-import net.minecraft.item.ItemStack;
-
-import com.cleanroommc.modularui.screen.ModularContainer;
-import com.cleanroommc.modularui.value.sync.PanelSyncManager;
-import it.unimi.dsi.fastutil.ints.Int2ObjectArrayMap;
-import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
-import mezz.jei.api.gui.IGuiItemStackGroup;
-import mezz.jei.api.gui.IRecipeLayout;
-import mezz.jei.api.recipe.transfer.IRecipeTransferError;
-import mezz.jei.api.recipe.transfer.IRecipeTransferHandler;
-import mezz.jei.api.recipe.transfer.IRecipeTransferHandlerHelper;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-public class GregTechGuiTransferHandler implements IRecipeTransferHandler<ModularContainer> {
-
-    private final IRecipeTransferHandlerHelper handlerHelper;
-
-    public GregTechGuiTransferHandler(IRecipeTransferHandlerHelper handlerHelper) {
-        this.handlerHelper = handlerHelper;
-    }
-
-    @Override
-    public @NotNull Class<ModularContainer> getContainerClass() {
-        return ModularContainer.class;
-    }
-
-    @Override
-    public @Nullable IRecipeTransferError transferRecipe(ModularContainer container,
-                                                         @NotNull IRecipeLayout recipeLayout,
-                                                         @NotNull EntityPlayer player, boolean maxTransfer,
-                                                         boolean doTransfer) {
-        if (!container.getSyncManager().isOpen("workbench")) {
-            return null;
-        }
-        PanelSyncManager syncManager = container.getSyncManager().getPanelSyncManager("workbench");
-        var recipeLogic = (CraftingRecipeLogic) syncManager.getSyncHandler("recipe_logic:0");
-        var pageController = (PagedWidgetSyncHandler) syncManager.getSyncHandler("page_controller:0");
-
-        if (!doTransfer) {
-            // todo highlighting in JEI?
-            return null;
-        }
-
-        var matrix = extractMatrix(recipeLayout.getItemStacks());
-        recipeLogic.fillCraftingGrid(matrix);
-        pageController.setPage(0);
-        return null;
-    }
-
-    private Int2ObjectMap<ItemStack> extractMatrix(IGuiItemStackGroup stackGroup) {
-        var ingredients = stackGroup.getGuiIngredients();
-        Int2ObjectMap<ItemStack> matrix = new Int2ObjectArrayMap<>(9);
-        for (var slot : ingredients.keySet()) {
-            if (slot != 0) {
-                var ing = ingredients.get(slot).getDisplayedIngredient();
-                if (ing == null) continue;
-                matrix.put(slot - 1, ingredients.get(slot).getDisplayedIngredient());
-            }
-        }
-        return matrix;
-    }
-}
diff --git a/src/main/java/gregtech/common/metatileentities/storage/CraftingRecipeLogic.java b/src/main/java/gregtech/common/metatileentities/storage/CraftingRecipeLogic.java
index eece105d06d..0314a8b23f9 100644
--- a/src/main/java/gregtech/common/metatileentities/storage/CraftingRecipeLogic.java
+++ b/src/main/java/gregtech/common/metatileentities/storage/CraftingRecipeLogic.java
@@ -1,12 +1,15 @@
 package gregtech.common.metatileentities.storage;
 
 import gregtech.api.items.toolitem.ItemGTToolbelt;
+import gregtech.api.mui.sync.PagedWidgetSyncHandler;
+import gregtech.api.mui.sync.RecipeTransferSyncHandler;
 import gregtech.api.util.DummyContainer;
 import gregtech.api.util.GTTransferUtils;
 import gregtech.api.util.GTUtility;
 import gregtech.api.util.ItemStackHashStrategy;
 import gregtech.common.crafting.ShapedOreEnergyTransferRecipe;
 import gregtech.common.mui.widget.workbench.CraftingInputSlot;
+import gregtech.integration.jei.JustEnoughItemsModule;
 
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.inventory.IInventory;
@@ -23,7 +26,6 @@
 import net.minecraftforge.items.IItemHandlerModifiable;
 
 import com.cleanroommc.modularui.network.NetworkUtils;
-import com.cleanroommc.modularui.value.sync.SyncHandler;
 import it.unimi.dsi.fastutil.ints.Int2BooleanArrayMap;
 import it.unimi.dsi.fastutil.ints.Int2BooleanMap;
 import it.unimi.dsi.fastutil.ints.Int2IntArrayMap;
@@ -38,11 +40,18 @@
 import it.unimi.dsi.fastutil.objects.Object2IntMap;
 import it.unimi.dsi.fastutil.objects.Object2IntOpenCustomHashMap;
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenCustomHashMap;
+import mezz.jei.api.gui.IGuiIngredient;
+import mezz.jei.api.gui.IGuiItemStackGroup;
+import mezz.jei.api.gui.IRecipeLayout;
+import mezz.jei.api.recipe.VanillaRecipeCategoryUid;
+import mezz.jei.api.recipe.transfer.IRecipeTransferError;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 import java.util.Collections;
 import java.util.Map;
 
-public class CraftingRecipeLogic extends SyncHandler {
+public class CraftingRecipeLogic extends RecipeTransferSyncHandler {
 
     // client only
     public static final int UPDATE_INGREDIENTS = 1;
@@ -120,6 +129,37 @@ public void fillCraftingGrid(Map<Integer, ItemStack> ingredients) {
         updateCurrentRecipe();
     }
 
+    @Override
+    public @Nullable IRecipeTransferError receiveRecipe(@NotNull IRecipeLayout recipeLayout, boolean maxTransfer,
+                                                        boolean simulate) {
+        if (!recipeLayout.getRecipeCategory().getUid().equals(VanillaRecipeCategoryUid.CRAFTING)) {
+            JustEnoughItemsModule.transferHelper.createInternalError();
+        } else if (simulate) {
+            // TODO: highlight missing items in recipe viewer
+            return null;
+        }
+
+        Int2ObjectMap<ItemStack> matrix = extractMatrix(recipeLayout.getItemStacks());
+        fillCraftingGrid(matrix);
+        getSyncManager().findSyncHandler("page_controller", 0, PagedWidgetSyncHandler.class).setPage(0);
+
+        return null;
+    }
+
+    private Int2ObjectMap<ItemStack> extractMatrix(IGuiItemStackGroup stackGroup) {
+        Map<Integer, ? extends IGuiIngredient<ItemStack>> ingredients = stackGroup.getGuiIngredients();
+        Int2ObjectMap<ItemStack> matrix = new Int2ObjectArrayMap<>(9);
+        for (int slot : ingredients.keySet()) {
+            if (slot != 0) {
+                ItemStack ingredient = ingredients.get(slot).getDisplayedIngredient();
+                if (ingredient == null) continue;
+                matrix.put(slot - 1, ingredient);
+            }
+        }
+
+        return matrix;
+    }
+
     public void setInputSlot(CraftingInputSlot slot, int index) {
         this.inputSlots[index] = slot;
     }
diff --git a/src/main/java/gregtech/common/metatileentities/storage/MetaTileEntityWorkbench.java b/src/main/java/gregtech/common/metatileentities/storage/MetaTileEntityWorkbench.java
index 3483c603223..c1d45fb6515 100644
--- a/src/main/java/gregtech/common/metatileentities/storage/MetaTileEntityWorkbench.java
+++ b/src/main/java/gregtech/common/metatileentities/storage/MetaTileEntityWorkbench.java
@@ -226,7 +226,7 @@ public ModularPanel buildUI(PosGuiData guiData, PanelSyncManager syncManager, UI
         syncManager.syncValue("recipe_memory", this.recipeMemory);
 
         var controller = new PagedWidget.Controller();
-        syncManager.syncValue("page_controller", new PagedWidgetSyncHandler(controller));
+        syncManager.syncValue("page_controller", 0, new PagedWidgetSyncHandler(controller));
 
         return GTGuis.createPanel(this, 176, 224)
                 .child(Flow.row()
diff --git a/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java b/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java
index 75c424483b4..cd578908577 100644
--- a/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java
+++ b/src/main/java/gregtech/integration/jei/JustEnoughItemsModule.java
@@ -12,7 +12,6 @@
 import gregtech.api.metatileentity.SteamMetaTileEntity;
 import gregtech.api.metatileentity.registry.MTERegistry;
 import gregtech.api.modules.GregTechModule;
-import gregtech.api.mui.GregTechGuiTransferHandler;
 import gregtech.api.recipes.Recipe;
 import gregtech.api.recipes.RecipeMap;
 import gregtech.api.recipes.category.GTRecipeCategory;
@@ -169,10 +168,6 @@ public void register(IModRegistry registry) {
         registry.getRecipeTransferRegistry().addRecipeTransferHandler(modularUIGuiHandler,
                 Constants.UNIVERSAL_RECIPE_TRANSFER_UID);
 
-        // register transfer handler for crafting recipes
-        registry.getRecipeTransferRegistry().addRecipeTransferHandler(new GregTechGuiTransferHandler(
-                jeiHelpers.recipeTransferHandlerHelper()), VanillaRecipeCategoryUid.CRAFTING);
-
         registry.addAdvancedGuiHandlers(modularUIGuiHandler);
         registry.addGhostIngredientHandler(modularUIGuiHandler.getGuiContainerClass(), modularUIGuiHandler);
 

From 5ad8370f0bce7042b2c9a8003d67c750f42dd0c2 Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sun, 30 Nov 2025 00:22:49 -0500
Subject: [PATCH 05/13] Remove reference map because the fastutils reference
 maps don't clear entries that had their key or value GC'd unlike the
 WeakHashMap

---
 src/main/java/gregtech/api/mui/GregTechGuiScreen.java | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
index 85dcf63636d..84bb49a661c 100644
--- a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
+++ b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
@@ -14,7 +14,7 @@
 import it.unimi.dsi.fastutil.ints.Int2ObjectAVLTreeMap;
 import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
 import it.unimi.dsi.fastutil.ints.IntComparators;
-import it.unimi.dsi.fastutil.objects.Object2ReferenceOpenHashMap;
+import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import mezz.jei.api.gui.IRecipeLayout;
 import mezz.jei.api.recipe.transfer.IRecipeTransferError;
 import org.jetbrains.annotations.NotNull;
@@ -101,9 +101,7 @@ public static void registerRecipeTransferHandler(@NotNull String key,
             }
         }
 
-        // Reference map so the receiver might:tm: not stick around for too long if someone forgets to unregister their
-        // receiver.
-        registeredRecipeTransferReceivers.computeIfAbsent(priority, $ -> new Object2ReferenceOpenHashMap<>())
+        registeredRecipeTransferReceivers.computeIfAbsent(priority, $ -> new Object2ObjectOpenHashMap<>())
                 .put(key, transferReceiver);
     }
 

From 930935b3095864fcb21ef9d642815ef6f7c5863b Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sun, 30 Nov 2025 00:24:54 -0500
Subject: [PATCH 06/13] Wrap (un)registration in a client-side check

---
 .../gregtech/api/mui/sync/RecipeTransferSyncHandler.java  | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
index 53da6eecdf3..8943f960b84 100644
--- a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
+++ b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
@@ -19,7 +19,9 @@ public abstract class RecipeTransferSyncHandler extends SyncHandler implements I
     @Override
     public void init(String key, PanelSyncManager syncManager) {
         super.init(key, syncManager);
-        GregTechGuiScreen.registerRecipeTransferHandler(getKey(), this, getTransferHandlerPriority());
+        if (syncManager.isClient()) {
+            GregTechGuiScreen.registerRecipeTransferHandler(getKey(), this, getTransferHandlerPriority());
+        }
     }
 
     protected int getTransferHandlerPriority() {
@@ -30,7 +32,9 @@ protected int getTransferHandlerPriority() {
     @MustBeInvokedByOverriders
     @Override
     public void dispose() {
-        GregTechGuiScreen.removeRecipeTransferHandler(getKey());
+        if (getSyncManager().isClient()) {
+            GregTechGuiScreen.removeRecipeTransferHandler(getKey());
+        }
         super.dispose();
     }
 }

From f9a10b5c656a6936995c99f08728b1795f698de6 Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sun, 30 Nov 2025 01:20:25 -0500
Subject: [PATCH 07/13] Only clear the receivers when the UI is actually being
 closed

---
 src/main/java/gregtech/api/mui/GregTechGuiScreen.java     | 7 ++++++-
 .../gregtech/api/mui/sync/RecipeTransferSyncHandler.java  | 1 +
 src/main/java/gregtech/client/ClientProxy.java            | 8 ++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
index 84bb49a661c..05a346fdde3 100644
--- a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
+++ b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
@@ -1,6 +1,7 @@
 package gregtech.api.mui;
 
 import gregtech.api.GTValues;
+import gregtech.client.ClientProxy;
 import gregtech.integration.jei.JustEnoughItemsModule;
 
 import net.minecraftforge.fml.relauncher.Side;
@@ -48,7 +49,11 @@ public GregTechGuiScreen(String owner, ModularPanel mainPanel, String themeId) {
 
     @Override
     public void onClose() {
-        registeredRecipeTransferReceivers.clear();
+        // Only clear all registered recipe receivers when the UI is truly closing, ie not just opening JEI over it.
+        if (ClientProxy.isGUIClosingPermanently) {
+            // Clear all registered recipe receivers on UI close, just in case.
+            registeredRecipeTransferReceivers.clear();
+        }
     }
 
     @Override
diff --git a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
index 8943f960b84..dadb2afdd3c 100644
--- a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
+++ b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
@@ -28,6 +28,7 @@ protected int getTransferHandlerPriority() {
         return 0;
     }
 
+    // TODO: this method is never actually called. Either fix on our side or wait for it to get fixed in MUI.
     @ApiStatus.OverrideOnly
     @MustBeInvokedByOverriders
     @Override
diff --git a/src/main/java/gregtech/client/ClientProxy.java b/src/main/java/gregtech/client/ClientProxy.java
index f9b712309a2..fdc894c53f1 100644
--- a/src/main/java/gregtech/client/ClientProxy.java
+++ b/src/main/java/gregtech/client/ClientProxy.java
@@ -57,6 +57,7 @@
 import net.minecraft.nbt.NBTTagCompound;
 import net.minecraft.util.text.TextFormatting;
 import net.minecraftforge.client.GuiIngameForge;
+import net.minecraftforge.client.event.GuiOpenEvent;
 import net.minecraftforge.client.event.ModelBakeEvent;
 import net.minecraftforge.client.event.ModelRegistryEvent;
 import net.minecraftforge.client.event.MouseEvent;
@@ -86,6 +87,8 @@
 @Mod.EventBusSubscriber(Side.CLIENT)
 public class ClientProxy extends CommonProxy {
 
+    public static boolean isGUIClosingPermanently = false;
+
     public void onPreLoad() {
         super.onPreLoad();
 
@@ -428,4 +431,9 @@ private static void renderToolbeltHotbar(GuiIngameForge gui, ItemStack stack, It
             GlStateManager.disableBlend();
         }
     }
+
+    @SubscribeEvent
+    public static void onGuiChange(GuiOpenEvent event) {
+        isGUIClosingPermanently = (event.getGui() == null);
+    }
 }

From 79403b7fd6192d2284f4b4ae48d56d35b914c62d Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 6 Dec 2025 16:18:09 -0500
Subject: [PATCH 08/13] Update to MUI 3.0.5

---
 dependencies.gradle                                |  2 +-
 .../java/gregtech/api/mui/GregTechGuiScreen.java   |  4 ++++
 .../api/mui/sync/FixedIntArraySyncValue.java       | 14 ++++++++++++++
 .../api/mui/sync/RecipeTransferSyncHandler.java    |  1 -
 .../MetaTileEntityLargeCombustionEngine.java       |  6 +++---
 .../generator/MetaTileEntityLargeTurbine.java      |  2 +-
 6 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/dependencies.gradle b/dependencies.gradle
index 112c8e2d2c9..a0d91ab38d4 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -40,7 +40,7 @@
 dependencies {
     // Published dependencies
     api("codechicken:codechickenlib:3.2.3.358")
-    api("com.cleanroommc:modularui:3.0.4") { transitive = false }
+    api("com.cleanroommc:modularui:3.0.5") { transitive = false }
     api("com.cleanroommc:groovyscript:1.2.0-hotfix1") { transitive = false }
     api("curse.maven:inventory-bogosorter-632327:7102721-deobf-6717233-sources-6717234") // Inventory BogoSorter − v1.5.0
     api("curse.maven:key-binding-patch-928895:5951859") // Key Binding Patch v1.3.3.3, needed by Inventory BogoSorter v1.5.0+
diff --git a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
index 05a346fdde3..a938624c8f2 100644
--- a/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
+++ b/src/main/java/gregtech/api/mui/GregTechGuiScreen.java
@@ -27,6 +27,7 @@
 public class GregTechGuiScreen extends ModularScreen implements RecipeViewerRecipeTransferHandler {
 
     // Stores lists of higher priority recipe receivers to the left of the tree
+    @SideOnly(Side.CLIENT)
     private static final Int2ObjectMap<Map<String, IRecipeTransferReceiver>> registeredRecipeTransferReceivers = new Int2ObjectAVLTreeMap<>(
             IntComparators.OPPOSITE_COMPARATOR);
 
@@ -81,6 +82,7 @@ public IRecipeTransferError transferRecipe(IRecipeLayout recipeLayout, boolean m
      * 
      * @throws IllegalArgumentException if a receiver with the given key already exists.
      */
+    @SideOnly(Side.CLIENT)
     public static void registerRecipeTransferHandler(@NotNull String key,
                                                      @NotNull IRecipeTransferReceiver transferReceiver) {
         registerRecipeTransferHandler(key, transferReceiver, 0);
@@ -96,6 +98,7 @@ public static void registerRecipeTransferHandler(@NotNull String key,
      * 
      * @throws IllegalArgumentException if a receiver with the given key already exists.
      */
+    @SideOnly(Side.CLIENT)
     public static void registerRecipeTransferHandler(@NotNull String key,
                                                      @NotNull IRecipeTransferReceiver transferReceiver,
                                                      int priority) {
@@ -115,6 +118,7 @@ public static void registerRecipeTransferHandler(@NotNull String key,
      * 
      * @throws IllegalArgumentException if no receiver exists with the given key.
      */
+    @SideOnly(Side.CLIENT)
     public static void removeRecipeTransferHandler(@NotNull String key) {
         for (Map<String, IRecipeTransferReceiver> subMap : registeredRecipeTransferReceivers.values()) {
             if (subMap.containsKey(key)) {
diff --git a/src/main/java/gregtech/api/mui/sync/FixedIntArraySyncValue.java b/src/main/java/gregtech/api/mui/sync/FixedIntArraySyncValue.java
index c3f29ee80b5..5fe7e294604 100644
--- a/src/main/java/gregtech/api/mui/sync/FixedIntArraySyncValue.java
+++ b/src/main/java/gregtech/api/mui/sync/FixedIntArraySyncValue.java
@@ -25,6 +25,10 @@ public class FixedIntArraySyncValue extends ValueSyncHandler<int[]> {
     private final Supplier<int[]> getter;
     private final @Nullable Consumer<int[]> setter;
 
+    public FixedIntArraySyncValue(@NotNull Supplier<int[]> getter) {
+        this(getter, null);
+    }
+
     public FixedIntArraySyncValue(@NotNull Supplier<int[]> getter, @Nullable Consumer<int[]> setter) {
         this.getter = Objects.requireNonNull(getter);
         this.setter = setter;
@@ -70,6 +74,11 @@ public boolean updateCacheFromSource(boolean isFirstSync) {
         return false;
     }
 
+    @Override
+    public void notifyUpdate() {
+        setValue(this.getter.get(), false, true);
+    }
+
     @Override
     public void write(@NotNull PacketBuffer buffer) throws IOException {
         for (int i : cache) {
@@ -92,4 +101,9 @@ public int[] getValue() {
     public int getValue(int index) {
         return this.cache[index];
     }
+
+    @Override
+    public Class<int[]> getValueType() {
+        return int[].class;
+    }
 }
diff --git a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
index dadb2afdd3c..8943f960b84 100644
--- a/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
+++ b/src/main/java/gregtech/api/mui/sync/RecipeTransferSyncHandler.java
@@ -28,7 +28,6 @@ protected int getTransferHandlerPriority() {
         return 0;
     }
 
-    // TODO: this method is never actually called. Either fix on our side or wait for it to get fixed in MUI.
     @ApiStatus.OverrideOnly
     @MustBeInvokedByOverriders
     @Override
diff --git a/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeCombustionEngine.java b/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeCombustionEngine.java
index 7c367d349b6..37c7f075a00 100644
--- a/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeCombustionEngine.java
+++ b/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeCombustionEngine.java
@@ -250,7 +250,7 @@ public int getProgressBarCount() {
 
     @Override
     public void registerBars(List<UnaryOperator<TemplateBarBuilder>> bars, PanelSyncManager syncManager) {
-        FixedIntArraySyncValue fuelValue = new FixedIntArraySyncValue(this::getFuelAmount, null);
+        FixedIntArraySyncValue fuelValue = new FixedIntArraySyncValue(this::getFuelAmount);
         syncManager.syncValue("fuel_amount", fuelValue);
         StringSyncValue fuelNameValue = new StringSyncValue(() -> {
             FluidStack stack = ((MultiblockFuelRecipeLogic) recipeMapWorkable).getInputFluidStack();
@@ -264,9 +264,9 @@ public void registerBars(List<UnaryOperator<TemplateBarBuilder>> bars, PanelSync
             return fluid.getName();
         });
         syncManager.syncValue("fuel_name", fuelNameValue);
-        FixedIntArraySyncValue lubricantValue = new FixedIntArraySyncValue(this::getLubricantAmount, null);
+        FixedIntArraySyncValue lubricantValue = new FixedIntArraySyncValue(this::getLubricantAmount);
         syncManager.syncValue("lubricant_amount", lubricantValue);
-        FixedIntArraySyncValue oxygenValue = new FixedIntArraySyncValue(this::getOxygenAmount, null);
+        FixedIntArraySyncValue oxygenValue = new FixedIntArraySyncValue(this::getOxygenAmount);
         syncManager.syncValue("oxygen_amount", oxygenValue);
         BooleanSyncValue boostValue = new BooleanSyncValue(this::isBoostAllowed);
         syncManager.syncValue("boost_allowed", boostValue);
diff --git a/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeTurbine.java b/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeTurbine.java
index 5a15302484d..ce69d58658b 100644
--- a/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeTurbine.java
+++ b/src/main/java/gregtech/common/metatileentities/multi/electric/generator/MetaTileEntityLargeTurbine.java
@@ -272,7 +272,7 @@ public int getProgressBarCount() {
 
     @Override
     public void registerBars(List<UnaryOperator<TemplateBarBuilder>> bars, PanelSyncManager syncManager) {
-        FixedIntArraySyncValue fuelValue = new FixedIntArraySyncValue(this::getFuelAmount, null);
+        FixedIntArraySyncValue fuelValue = new FixedIntArraySyncValue(this::getFuelAmount);
         StringSyncValue fuelNameValue = new StringSyncValue(() -> {
             FluidStack stack = ((MultiblockFuelRecipeLogic) recipeMapWorkable).getInputFluidStack();
             if (stack == null) {

From 80cdbb1a5246693ee0c769a3e53b13ecdca686c1 Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 6 Dec 2025 16:30:53 -0500
Subject: [PATCH 09/13] Reword IRecipeTransferReceiver javadoc

---
 .../java/gregtech/api/mui/IRecipeTransferReceiver.java     | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
index 6137d4037f6..32e2d3cfbd7 100644
--- a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
+++ b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
@@ -32,8 +32,7 @@ public interface IRecipeTransferReceiver {
      * A factory for default {@link IRecipeTransferError}s is available at {@link JustEnoughItemsModule#transferHelper}.
      * There are three default options for errors: <br/>
      * - {@link IRecipeTransferHandlerHelper#createInternalError()}: mark the recipe as invalid for transferring by
-     * graying out the + button. If there are multiple registered recipe transfer receivers on the same panel, returning
-     * an internal error will skip this receiver and try the others. <br/>
+     * graying out the + button. <br/>
      * - {@link IRecipeTransferHandlerHelper#createUserErrorWithTooltip(String)}: the same as above, but also display a
      * message when hovering over the + button. <br/>
      * - {@link IRecipeTransferHandlerHelper#createUserErrorForSlots(String, Collection)}: the same as above, but
@@ -44,7 +43,9 @@ public interface IRecipeTransferReceiver {
      * @param maxTransfer  if the receiver should try to move as many ingredients as possible to the crafting slots, ie
      *                     a crafting table.
      * @param simulate     if this recipe should only simulate being transferred
-     * @return {@code null} if the transfer should succeed or a {@link IRecipeTransferError} if not.
+     * @return {@code null} if the transfer should succeed or an {@link IRecipeTransferError} if not. If there are
+     *         multiple registered recipe transfer receivers on the same panel, returning an error with type
+     *         {@link IRecipeTransferError.Type#INTERNAL} will skip this and attempt the next one.
      */
     @Nullable
     @SideOnly(Side.CLIENT)

From 633ae5aa9932541f22452c3cf003137b7e1da15a Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Sat, 6 Dec 2025 16:32:58 -0500
Subject: [PATCH 10/13] Reword IRecipeTransferReceiver javadoc pt2

---
 src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
index 32e2d3cfbd7..148b6b88620 100644
--- a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
+++ b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
@@ -41,7 +41,7 @@ public interface IRecipeTransferReceiver {
      * 
      * @param recipeLayout the recipe layout that contains the recipe category, and the item and fluid stacks.
      * @param maxTransfer  if the receiver should try to move as many ingredients as possible to the crafting slots, ie
-     *                     a crafting table.
+     *                     shift clicking a recipe into a crafting table.
      * @param simulate     if this recipe should only simulate being transferred
      * @return {@code null} if the transfer should succeed or an {@link IRecipeTransferError} if not. If there are
      *         multiple registered recipe transfer receivers on the same panel, returning an error with type

From 92436357a5bca2ea9341bf9875ecb271e7d0e88d Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Thu, 11 Dec 2025 16:04:43 -0500
Subject: [PATCH 11/13] MUI 3.0.6

---
 dependencies.gradle | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dependencies.gradle b/dependencies.gradle
index a0d91ab38d4..f70b692ae2b 100644
--- a/dependencies.gradle
+++ b/dependencies.gradle
@@ -40,7 +40,7 @@
 dependencies {
     // Published dependencies
     api("codechicken:codechickenlib:3.2.3.358")
-    api("com.cleanroommc:modularui:3.0.5") { transitive = false }
+    api("com.cleanroommc:modularui:3.0.6") { transitive = false }
     api("com.cleanroommc:groovyscript:1.2.0-hotfix1") { transitive = false }
     api("curse.maven:inventory-bogosorter-632327:7102721-deobf-6717233-sources-6717234") // Inventory BogoSorter − v1.5.0
     api("curse.maven:key-binding-patch-928895:5951859") // Key Binding Patch v1.3.3.3, needed by Inventory BogoSorter v1.5.0+

From 4363e27c3644872ecd7dbdaaf1b23c0bd6e0307f Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Thu, 11 Dec 2025 16:08:17 -0500
Subject: [PATCH 12/13] touch up IRecipeTransferReceiver javadoc

---
 .../java/gregtech/api/mui/IRecipeTransferReceiver.java    | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
index 148b6b88620..ea963c7c3fd 100644
--- a/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
+++ b/src/main/java/gregtech/api/mui/IRecipeTransferReceiver.java
@@ -22,8 +22,8 @@
  * Register it via {@link GregTechGuiScreen#registerRecipeTransferHandler(String, IRecipeTransferReceiver)} or
  * {@link GregTechGuiScreen#registerRecipeTransferHandler(String, IRecipeTransferReceiver, int)} if you want to
  * prioritize checking a certain handler first. <br/>
- * If you're implementing this on a {@link SyncHandler}, it's recommended to extend {@link RecipeTransferSyncHandler} so
- * registering and unregistering from {@link GregTechGuiScreen} is done for you.
+ * If you're implementing this on a {@link SyncHandler}, it's recommended to extend {@link RecipeTransferSyncHandler}
+ * instead as registering and unregistering from {@link GregTechGuiScreen} is done for you.
  */
 public interface IRecipeTransferReceiver {
 
@@ -36,8 +36,8 @@ public interface IRecipeTransferReceiver {
      * - {@link IRecipeTransferHandlerHelper#createUserErrorWithTooltip(String)}: the same as above, but also display a
      * message when hovering over the + button. <br/>
      * - {@link IRecipeTransferHandlerHelper#createUserErrorForSlots(String, Collection)}: the same as above, but
-     * additionally highlight certain slots in the recipe to, for example, mark missing ingredients. Important: will
-     * throw {@link IllegalArgumentException} if the supplied {@link Collection} is empty!
+     * additionally highlight certain slots in the recipe to, for example, mark missing ingredients. <b>Important: will
+     * throw {@link IllegalArgumentException} if the supplied {@link Collection} is empty!</b>
      * 
      * @param recipeLayout the recipe layout that contains the recipe category, and the item and fluid stacks.
      * @param maxTransfer  if the receiver should try to move as many ingredients as possible to the crafting slots, ie

From f6943c10aa7e7ed3c09208f181fad78e402e99b0 Mon Sep 17 00:00:00 2001
From: Zorbatron <46525467+Zorbatron@users.noreply.github.com>
Date: Fri, 12 Dec 2025 19:04:06 -0500
Subject: [PATCH 13/13] Remove name set from panel in MultiblockUIFactory

---
 .../api/metatileentity/multiblock/ui/MultiblockUIFactory.java    | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/main/java/gregtech/api/metatileentity/multiblock/ui/MultiblockUIFactory.java b/src/main/java/gregtech/api/metatileentity/multiblock/ui/MultiblockUIFactory.java
index bdd21a36b27..f1e70af7e1e 100644
--- a/src/main/java/gregtech/api/metatileentity/multiblock/ui/MultiblockUIFactory.java
+++ b/src/main/java/gregtech/api/metatileentity/multiblock/ui/MultiblockUIFactory.java
@@ -234,7 +234,6 @@ public MultiblockUIFactory addScreenChildren(ScreenFunction function) {
      */
     public @NotNull ModularPanel buildUI(PosGuiData guiData, PanelSyncManager panelSyncManager) {
         var panel = GTGuis.createPanel(mte, width, height)
-                .debugName("root_panel")
                 .childIf(!disableDisplay, () -> createScreen(panelSyncManager));
 
         // TODO createExtras() hook for overrides?