Fix 1.21 player chat read type

Replaced by Protocol#registerClientbound & Protocol#registerServerbound

README.md

@@ -7,11 +7,15 @@
 **Allows the connection of higher client versions to lower server versions -
 it works on any platform you can think of.**
 
-The base ViaVersion jar runs on Paper and Velocity. We also have projects integrating ViaVersion to run
-on Fabric, Forge, Sponge, or as a standalone proxy to join from basically any client version on
-any server version from the past decade. **See [HERE](https://viaversion.com) for an overview of the different Via\* projects.**
+The base ViaVersion jar runs on [Paper](https://papermc.io/software/paper/)
+and [Velocity](https://papermc.io/software/velocity/). We also have projects integrating ViaVersion to run
+on [Fabric](https://github.com/ViaVersion/ViaFabric), [Forge](https://github.com/ViaVersion/ViaForge), [Bungee](https://github.com/ViaVersion/ViaBungee), [Sponge](https://github.com/ViaVersion/ViaSponge),
+or as [a standalone proxy](https://github.com/ViaVersion/ViaProxy) to join from basically any client version on
+any server version from the past decade. **See [HERE](https://viaversion.com) for an overview of the different Via\*
+projects.**
 
-Note that ViaVersion will be able to **run best on either Paper servers or through [ViaFabricPlus](https://github.com/ViaVersion/ViaFabricPlus?tab=readme-ov-file#viafabricplus)** due to having
+Note that ViaVersion will be able to **run best on either Paper servers or
+through [ViaFabricPlus](https://github.com/ViaVersion/ViaFabricPlus?tab=readme-ov-file#viafabricplus)** due to having
 direct access to client/server state and more extensive API.
 
 Supported Versions:
@@ -22,10 +26,16 @@ Supported Versions:
 
 Snapshot support
 --------
-**ViaVersion will only be released a few days *after* a Minecraft update** unless the protocol changes of the update were trivial. If you want early-access, usually days or even weeks before the final release, you can subscribe to either:
-- [GitHub Sponsors](https://github.com/sponsors/kennytv/sponsorships?sponsor=kennytv&tier_id=385613&preview=false) (preferred option. Use the `/verify` command on this Discord after), or alternatively
-- [Patreon](https://www.patreon.com/kennytv/membership) (see the highest tier and make sure to link Patreon to your Discord account under Settings->Connections)
-  This also includes access to a private repository with the code, which will be pushed to the public repository after the given delay on a Minecraft update.
+**ViaVersion will only be released a few days *after* a Minecraft update** unless the protocol changes of the update
+were trivial. If you want early-access, usually days or even weeks before the final release, you can subscribe to
+either:
+
+- [GitHub Sponsors](https://github.com/sponsors/kennytv/sponsorships?sponsor=kennytv&tier_id=385613&preview=false) (
+  preferred option. Use the `/verify` command on this Discord after), or alternatively
+- [Patreon](https://www.patreon.com/kennytv/membership) (see the highest tier and make sure to link Patreon to your
+  Discord account under Settings->Connections)
+  This also includes access to a private repository with the code, which will be pushed to the public repository after
+  the given delay on a Minecraft update.
 
 Releases/Dev Builds
 --------
@@ -89,7 +99,8 @@ You need JDK 17 or newer to build ViaVersion.
 
 Mapping Files
 --------------
-Mapping files are generated and managed in our [Mappings repository](https://github.com/ViaVersion/Mappings). The generated mapping output is stored [here](./common/src/main/resources/assets/viaversion).
+Mapping files are generated and managed in our [Mappings repository](https://github.com/ViaVersion/Mappings). The
+generated mapping output is stored [here](./common/src/main/resources/assets/viaversion).
 
 Resources
 --------

api/src/main/java-templates/com/viaversion/viaversion/util/VersionInfo.java

@@ -1,6 +1,6 @@
 /*
  * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
- * Copyright (C) 2016-2025 ViaVersion and contributors
+ * Copyright (C) 2016-2026 ViaVersion and contributors
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal

api/src/main/java/com/viaversion/viaversion/api/data/FullIdentityMappings.java

@@ -0,0 +1,123 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.data;
+
+import com.google.common.base.Preconditions;
+import com.viaversion.viaversion.api.data.MappingDataLoader.IdentifiersPair;
+import com.viaversion.viaversion.util.Key;
+import it.unimi.dsi.fastutil.objects.Object2IntMap;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+public class FullIdentityMappings implements FullMappings {
+    private static final String[] EMPTY_ARRAY = new String[0];
+    private final Object2IntMap<String> stringToId;
+    private final String[] idToString;
+    private final Mappings mappings;
+
+    public FullIdentityMappings(final IdentifiersPair identifiersPair, final Mappings mappings) {
+        Preconditions.checkNotNull(mappings, "Mappings cannot be null");
+        this.mappings = mappings;
+        this.stringToId = FullMappingsBase.toInverseMap(identifiersPair.unmapped());
+        this.idToString = identifiersPair.unmapped().toArray(EMPTY_ARRAY);
+    }
+
+    private FullIdentityMappings(final Object2IntMap<String> stringToId, final String[] idToString, final Mappings mappings) {
+        this.stringToId = stringToId;
+        this.idToString = idToString;
+        this.mappings = mappings;
+    }
+
+    @Override
+    public int id(final String identifier) {
+        return stringToId.getInt(Key.stripMinecraftNamespace(identifier));
+    }
+
+    @Override
+    public int mappedId(final String mappedIdentifier) {
+        return id(mappedIdentifier);
+    }
+
+    @Override
+    public String identifier(final int id) {
+        if (id < 0 || id >= idToString.length) {
+            return null;
+        }
+        final String identifier = idToString[id];
+        return Key.namespaced(identifier);
+    }
+
+    @Override
+    public @Nullable String identifier(final String mappedIdentifier) {
+        final int mappedId = mappedId(mappedIdentifier);
+        if (mappedId == -1) {
+            return null;
+        }
+        final int id = mappings.inverse().getNewId(mappedId);
+        return id != -1 ? identifier(id) : null;
+    }
+
+    @Override
+    public @Nullable String mappedIdentifier(final int mappedId) {
+        return identifier(mappedId);
+    }
+
+    @Override
+    public @Nullable String mappedIdentifier(final String identifier) {
+        return identifier(identifier);
+    }
+
+    @Override
+    public int getNewId(int id) {
+        return mappings.getNewId(id);
+    }
+
+    @Override
+    public void setNewId(int id, int mappedId) {
+        mappings.setNewId(id, mappedId);
+    }
+
+    @Override
+    public int size() {
+        return mappings.size();
+    }
+
+    @Override
+    public int mappedSize() {
+        return mappings.mappedSize();
+    }
+
+    @Override
+    public boolean isIdentity() {
+        return true;
+    }
+
+    @Override
+    public boolean isIntIdIdentity() {
+        return true;
+    }
+
+    @Override
+    public FullMappings inverse() {
+        return new FullIdentityMappings(stringToId, idToString, mappings.inverse());
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/data/FullMappings.java

@@ -77,6 +77,14 @@ public interface FullMappings extends BiMappings {
      */
     @Nullable String mappedIdentifier(String identifier);
 
+    /**
+     * Returns whether the int id mappings are identity mappings.
+     *
+     * @return whether the int id mappings are identity mappings
+     * @see #isIdentity()
+     */
+    boolean isIntIdIdentity();
+
     @Override
     FullMappings inverse();
 }

api/src/main/java/com/viaversion/viaversion/api/data/FullMappingsBase.java

@@ -23,6 +23,7 @@
 package com.viaversion.viaversion.api.data;
 
 import com.google.common.base.Preconditions;
+import com.viaversion.viaversion.api.data.MappingDataLoader.IdentifiersPair;
 import com.viaversion.viaversion.util.Key;
 import it.unimi.dsi.fastutil.objects.Object2IntMap;
 import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
@@ -37,13 +38,13 @@ public class FullMappingsBase implements FullMappings {
     private final String[] mappedIdToString;
     private final Mappings mappings;
 
-    public FullMappingsBase(final List<String> unmappedIdentifiers, final List<String> mappedIdentifiers, final Mappings mappings) {
+    public FullMappingsBase(final IdentifiersPair identifiersPair, final Mappings mappings) {
         Preconditions.checkNotNull(mappings, "Mappings cannot be null");
         this.mappings = mappings;
-        this.stringToId = toInverseMap(unmappedIdentifiers);
-        this.mappedStringToId = toInverseMap(mappedIdentifiers);
-        this.idToString = unmappedIdentifiers.toArray(EMPTY_ARRAY);
-        this.mappedIdToString = mappedIdentifiers.toArray(EMPTY_ARRAY);
+        this.stringToId = toInverseMap(identifiersPair.unmapped());
+        this.idToString = identifiersPair.unmapped().toArray(EMPTY_ARRAY);
+        this.mappedStringToId = toInverseMap(identifiersPair.mapped());
+        this.mappedIdToString = identifiersPair.mapped().toArray(EMPTY_ARRAY);
     }
 
     private FullMappingsBase(final Object2IntMap<String> stringToId, final Object2IntMap<String> mappedStringToId, final String[] idToString, final String[] mappedIdToString, final Mappings mappings) {
@@ -54,7 +55,11 @@ public class FullMappingsBase implements FullMappings {
         this.mappings = mappings;
     }
 
-    private static Object2IntMap<String> toInverseMap(final List<String> list) {
+    public static FullMappings of(final IdentifiersPair identifiersPair, final Mappings mappings) {
+        return mappings.isIdentity() && identifiersPair.identity() ? new FullIdentityMappings(identifiersPair, mappings) : new FullMappingsBase(identifiersPair, mappings);
+    }
+
+    static Object2IntMap<String> toInverseMap(final List<String> list) {
         final Object2IntMap<String> map = new Object2IntOpenHashMap<>(list.size());
         map.defaultReturnValue(-1);
         for (int i = 0; i < list.size(); i++) {
@@ -135,6 +140,11 @@ public class FullMappingsBase implements FullMappings {
         return mappings.mappedSize();
     }
 
+    @Override
+    public boolean isIntIdIdentity() {
+        return mappings.isIdentity();
+    }
+
     @Override
     public FullMappings inverse() {
         return new FullMappingsBase(mappedStringToId, stringToId, mappedIdToString, idToString, mappings.inverse());

api/src/main/java/com/viaversion/viaversion/api/data/IdentityMappings.java

@@ -38,4 +38,9 @@ public record IdentityMappings(int size, int mappedSize) implements Mappings {
     public Mappings inverse() {
         return new IdentityMappings(mappedSize, size);
     }
+
+    @Override
+    public boolean isIdentity() {
+        return true;
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/data/MappingData.java

@@ -170,6 +170,8 @@ public interface MappingData {
 
     @Nullable FullMappings getRecipeSerializerMappings();
 
+    @Nullable FullMappings getSlotDisplayMappings();
+
     @Nullable FullMappings getDataComponentSerializerMappings();
 
     default @Nullable FullMappings getFullMappings(final MappingType mappingType) {

api/src/main/java/com/viaversion/viaversion/api/data/MappingDataBase.java

@@ -26,6 +26,7 @@ import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.IntArrayTag;
 import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.api.Via;
+import com.viaversion.viaversion.api.data.MappingDataLoader.IdentifiersPair;
 import com.viaversion.viaversion.api.minecraft.RegistryType;
 import com.viaversion.viaversion.api.minecraft.TagData;
 import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
@@ -45,6 +46,7 @@ public class MappingDataBase implements MappingData {
     protected FullMappings entityMappings;
     protected FullMappings recipeSerializerMappings;
     protected FullMappings itemDataSerializerMappings;
+    protected FullMappings slotDisplayMappings;
     protected FullMappings attributeMappings;
     protected FullMappings blockEntityMappings;
     protected ParticleMappings particleMappings;
@@ -89,19 +91,19 @@ public class MappingDataBase implements MappingData {
 
             entityMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "entities");
             argumentTypeMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "argumenttypes");
+            slotDisplayMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "slot_displays");
             recipeSerializerMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "recipe_serializers");
             itemDataSerializerMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "data_component_type");
             attributeMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "attributes");
             blockEntityMappings = loadFullMappings(data, unmappedIdentifierData, mappedIdentifierData, "blockentities");
 
-            final List<String> unmappedParticles = identifiersFromGlobalIds(unmappedIdentifierData, "particles");
-            final List<String> mappedParticles = identifiersFromGlobalIds(mappedIdentifierData, "particles");
-            if (unmappedParticles != null && mappedParticles != null) {
+            final IdentifiersPair particleIdentifiers = identifiersFromGlobalIds(unmappedIdentifierData, mappedIdentifierData, "particles");
+            if (particleIdentifiers != null) {
                 Mappings particleMappings = loadMappings(data, "particles");
                 if (particleMappings == null) {
-                    particleMappings = new IdentityMappings(unmappedParticles.size(), mappedParticles.size());
+                    particleMappings = new IdentityMappings(particleIdentifiers.unmapped().size(), particleIdentifiers.mapped().size());
                 }
-                this.particleMappings = new ParticleMappings(unmappedParticles, mappedParticles, particleMappings);
+                this.particleMappings = new ParticleMappings(particleIdentifiers, particleMappings);
             }
         } else {
             // Might not have identifiers in older versions
@@ -130,6 +132,10 @@ public class MappingDataBase implements MappingData {
         return MappingDataLoader.INSTANCE.identifiersFromGlobalIds(mappingsTag, key);
     }
 
+    protected @Nullable IdentifiersPair identifiersFromGlobalIds(final CompoundTag unmappedTag, final CompoundTag mappedTag, final String key) {
+        return MappingDataLoader.INSTANCE.identifiersFromGlobalIds(unmappedTag, mappedTag, key);
+    }
+
     protected @Nullable CompoundTag readMappingsFile(final String name) {
         return MappingDataLoader.INSTANCE.loadNBT(name);
     }
@@ -156,14 +162,12 @@ public class MappingDataBase implements MappingData {
             return null;
         }
 
-        final List<String> unmappedIdentifiers = identifiersFromGlobalIds(unmappedIdentifiersTag, key);
-        final List<String> mappedIdentifiers = identifiersFromGlobalIds(mappedIdentifiersTag, key);
+        final IdentifiersPair identifiersPair = identifiersFromGlobalIds(unmappedIdentifiersTag, mappedIdentifiersTag, key);
         Mappings mappings = loadBiMappings(data, key); // Load as bi-mappings to keep the inverse cached
         if (mappings == null) {
-            mappings = new IdentityMappings(unmappedIdentifiers.size(), mappedIdentifiers.size());
+            mappings = new IdentityMappings(identifiersPair.unmapped().size(), identifiersPair.mapped().size());
         }
-
-        return new FullMappingsBase(unmappedIdentifiers, mappedIdentifiers, mappings);
+        return FullMappingsBase.of(identifiersPair, mappings);
     }
 
     protected @Nullable BiMappings loadBiMappings(final CompoundTag data, final String key) {
@@ -335,6 +339,11 @@ public class MappingDataBase implements MappingData {
         return recipeSerializerMappings;
     }
 
+    @Override
+    public @Nullable FullMappings getSlotDisplayMappings() {
+        return slotDisplayMappings;
+    }
+
     @Override
     public @Nullable IntSet changedBlocks() {
         return changedBlocks;

api/src/main/java/com/viaversion/viaversion/api/data/MappingDataLoader.java

@@ -81,8 +81,9 @@ public class MappingDataLoader {
         for (final Map.Entry<String, Tag> entry : globalIdentifiers.entrySet()) {
             //noinspection unchecked
             final ListTag<StringTag> value = (ListTag<StringTag>) entry.getValue();
-            final String[] array = new String[value.size()];
-            for (int i = 0, size = value.size(); i < size; i++) {
+            final int size = value.size();
+            final String[] array = new String[size];
+            for (int i = 0; i < size; i++) {
                 array[i] = value.get(i).getValue();
             }
             GLOBAL_IDENTIFIER_INDEXES.put(entry.getKey(), array);
@@ -272,13 +273,60 @@ public class MappingDataLoader {
 
     public @Nullable List<String> identifiersFromGlobalIds(final CompoundTag mappingsTag, final String key) {
         final Mappings mappings = loadMappings(mappingsTag, key);
-        if (mappings == null) {
+        return mappings != null ? identifiers(mappings, key) : null;
+
+    }
+
+    /**
+     * Returns a pair of identifier lists, also keeping track of whether the two lists are equal.
+     *
+     * @param unmappedTag unmapped mappings tag
+     * @param mappedTag   mapped mappings tag
+     * @param key         mappings key
+     * @return pair of identifier lists
+     */
+    public @Nullable IdentifiersPair identifiersFromGlobalIds(final CompoundTag unmappedTag, final CompoundTag mappedTag, final String key) {
+        final Mappings unmapped = loadMappings(unmappedTag, key);
+        if (unmapped == null) {
             return null;
         }
 
+        final Mappings mapped = loadMappings(mappedTag, key);
+        if (mapped == null) {
+            return null;
+        }
+
+        final int size = unmapped.size();
+        if (size != mapped.size()) {
+            return new IdentifiersPair(identifiers(unmapped, key), identifiers(mapped, key), false);
+        }
+
+        // Small optimization to only load one array and reduce loading for full mappings
+        final List<String> unmappedIdentifiers = new ArrayList<>(size);
+        final List<String> mappedIdentifiers = new ArrayList<>(size);
+        boolean identity = true;
+        for (int i = 0; i < size; i++) {
+            final int unmappedGlobalId = unmapped.getNewId(i);
+            final int mappedGlobalId = mapped.getNewId(i);
+            final String unmappedIdentifier = identifierFromGlobalId(key, unmappedGlobalId);
+            if (unmappedGlobalId == mappedGlobalId) {
+                unmappedIdentifiers.add(unmappedIdentifier);
+                mappedIdentifiers.add(unmappedIdentifier);
+                continue;
+            }
+
+            identity = false;
+            unmappedIdentifiers.add(unmappedIdentifier);
+            mappedIdentifiers.add(identifierFromGlobalId(key, mappedGlobalId));
+        }
+        return identity ? new IdentifiersPair(unmappedIdentifiers) : new IdentifiersPair(unmappedIdentifiers, mappedIdentifiers);
+    }
+
+    private List<String> identifiers(final Mappings mappings, final String key) {
         final List<String> identifiers = new ArrayList<>(mappings.size());
         for (int i = 0; i < mappings.size(); i++) {
-            identifiers.add(identifierFromGlobalId(key, mappings.getNewId(i)));
+            final int globalId = mappings.getNewId(i);
+            identifiers.add(identifierFromGlobalId(key, globalId));
         }
         return identifiers;
     }
@@ -342,4 +390,15 @@ public class MappingDataLoader {
 
         T create(V mappings, int mappedSize);
     }
+
+    public record IdentifiersPair(List<String> unmapped, List<String> mapped, boolean identity) {
+
+        public IdentifiersPair(final List<String> unmapped, final List<String> mapped) {
+            this(unmapped, mapped, false);
+        }
+
+        public IdentifiersPair(final List<String> identifiers) {
+            this(identifiers, identifiers, true);
+        }
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/data/Mappings.java

@@ -22,6 +22,8 @@
  */
 package com.viaversion.viaversion.api.data;
 
+import org.checkerframework.checker.nullness.qual.Nullable;
+
 public interface Mappings {
 
     /**
@@ -84,4 +86,40 @@ public interface Mappings {
      * @return mappings with keys and values swapped
      */
     Mappings inverse();
+
+
+    /**
+     * Returns whether the mappings are unchanged identity mappings.
+     *
+     * @return whether the mappings are unchanged identity mappings
+     */
+    default boolean isIdentity() {
+        return false;
+    }
+
+    /**
+     * Returns whether the mappings null or identity mappings.
+     *
+     * @param mappings mappings
+     * @return whether the mappings are identity mappings
+     * @see #isFullIdentity(Mappings)
+     */
+    static boolean isIntIdIdentity(@Nullable final Mappings mappings) {
+        if (mappings == null) {
+            return true;
+        }
+        return mappings instanceof FullMappings fullMappings ? fullMappings.isIntIdIdentity() : mappings.isIdentity();
+    }
+
+    /**
+     * Returns whether the mappings null or full identity mappings.
+     * Stronger than {@link #isIntIdIdentity(Mappings)}, but equal to that if not {@link FullMappings}.
+     *
+     * @param mappings mappings
+     * @return whether the mappings are full identity mappings
+     * @see #isIntIdIdentity(Mappings)
+     */
+    static boolean isFullIdentity(@Nullable final Mappings mappings) {
+        return mappings == null || mappings.isIdentity();
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/data/ParticleMappings.java

@@ -22,16 +22,16 @@
  */
 package com.viaversion.viaversion.api.data;
 
+import com.viaversion.viaversion.api.data.MappingDataLoader.IdentifiersPair;
 import it.unimi.dsi.fastutil.ints.IntArrayList;
 import it.unimi.dsi.fastutil.ints.IntList;
-import java.util.List;
 
 public class ParticleMappings extends FullMappingsBase {
     private final IntList itemParticleIds = new IntArrayList(4);
     private final IntList blockParticleIds = new IntArrayList(4);
 
-    public ParticleMappings(final List<String> unmappedIdentifiers, final List<String> mappedIdentifiers, final Mappings mappings) {
-        super(unmappedIdentifiers, mappedIdentifiers, mappings);
+    public ParticleMappings(final IdentifiersPair identifiersPair, final Mappings mappings) {
+        super(identifiersPair, mappings);
         addBlockParticle("block");
         addBlockParticle("falling_dust");
         addBlockParticle("block_marker");

api/src/main/java/com/viaversion/viaversion/api/minecraft/HolderSet.java

@@ -22,6 +22,7 @@
  */
 package com.viaversion.viaversion.api.minecraft;
 
+import com.google.common.base.Preconditions;
 import com.viaversion.nbt.tag.ListTag;
 import com.viaversion.nbt.tag.StringTag;
 import com.viaversion.nbt.tag.Tag;
@@ -40,6 +41,7 @@ public interface HolderSet {
      * @return a new holder set
      */
     static HolderSet of(final String tagKey) {
+        Preconditions.checkNotNull(tagKey);
         return new HolderSetImpl.Tag(tagKey);
     }
 
@@ -50,6 +52,7 @@ public interface HolderSet {
      * @return a new holder set
      */
     static HolderSet of(final int[] ids) {
+        Preconditions.checkNotNull(ids);
         return new HolderSetImpl.Ids(ids);
     }
 

api/src/main/java/com/viaversion/viaversion/api/minecraft/RegistryType.java

@@ -34,7 +34,9 @@ public enum RegistryType implements RegistryKey {
     FLUID("fluid"),
     ENTITY("entity_type"),
     GAME_EVENT("game_event"),
-    ENCHANTMENT("enchantment");
+    ENCHANTMENT("enchantment"),
+    DAMAGE_TYPE("damage_type"),
+    BANNER_PATTERN("banner_pattern");
 
     private static final Map<String, RegistryType> MAP = new HashMap<>();
     private static final RegistryType[] VALUES = values();

api/src/main/java/com/viaversion/viaversion/api/minecraft/chunks/ChunkSection.java

@@ -61,6 +61,17 @@ public interface ChunkSection {
 
     void setNonAirBlocksCount(int nonAirBlocksCount);
 
+    /**
+     * Returns the number of fluid blocks in this section.
+     * <p>
+     * Available with versions 26.1+.
+     *
+     * @return fluid blocks in this section
+     */
+    int getFluidCount();
+
+    void setFluidCount(int fluidCount);
+
     /**
      * Returns whether this section holds light data.
      * Only true for &lt; 1.14 chunks.

api/src/main/java/com/viaversion/viaversion/api/minecraft/chunks/ChunkSectionImpl.java

@@ -30,6 +30,7 @@ public class ChunkSectionImpl implements ChunkSection {
     private final EnumMap<PaletteType, DataPalette> palettes = new EnumMap<>(PaletteType.class);
     private ChunkSectionLight light;
     private int nonAirBlocksCount;
+    private int fluidCount;
 
     public ChunkSectionImpl() {
     }
@@ -58,6 +59,16 @@ public class ChunkSectionImpl implements ChunkSection {
         this.nonAirBlocksCount = nonAirBlocksCount;
     }
 
+    @Override
+    public int getFluidCount() {
+        return fluidCount;
+    }
+
+    @Override
+    public void setFluidCount(final int fluidCount) {
+        this.fluidCount = fluidCount;
+    }
+
     @Override
     public @Nullable ChunkSectionLight getLight() {
         return light;

api/src/main/java/com/viaversion/viaversion/api/minecraft/data/StructuredDataKey.java

@@ -37,6 +37,7 @@ import com.viaversion.viaversion.api.minecraft.data.version.StructuredDataKeys1_
 import com.viaversion.viaversion.api.minecraft.data.version.StructuredDataKeys1_21_5;
 import com.viaversion.viaversion.api.minecraft.item.data.AdventureModePredicate;
 import com.viaversion.viaversion.api.minecraft.item.data.ArmorTrim;
+import com.viaversion.viaversion.api.minecraft.item.data.ArmorTrimMaterial;
 import com.viaversion.viaversion.api.minecraft.item.data.AttackRange;
 import com.viaversion.viaversion.api.minecraft.item.data.AttributeModifiers1_20_5;
 import com.viaversion.viaversion.api.minecraft.item.data.AttributeModifiers1_21;
@@ -47,7 +48,8 @@ import com.viaversion.viaversion.api.minecraft.item.data.BlockStateProperties;
 import com.viaversion.viaversion.api.minecraft.item.data.BlocksAttacks;
 import com.viaversion.viaversion.api.minecraft.item.data.Consumable1_21_2;
 import com.viaversion.viaversion.api.minecraft.item.data.CustomModelData1_21_4;
-import com.viaversion.viaversion.api.minecraft.item.data.DamageResistant;
+import com.viaversion.viaversion.api.minecraft.item.data.DamageResistant1_21_2;
+import com.viaversion.viaversion.api.minecraft.item.data.DamageResistant26_1;
 import com.viaversion.viaversion.api.minecraft.item.data.DamageType;
 import com.viaversion.viaversion.api.minecraft.item.data.DeathProtection;
 import com.viaversion.viaversion.api.minecraft.item.data.DebugStickState;
@@ -65,12 +67,14 @@ import com.viaversion.viaversion.api.minecraft.item.data.Instrument1_20_5;
 import com.viaversion.viaversion.api.minecraft.item.data.Instrument1_21_2;
 import com.viaversion.viaversion.api.minecraft.item.data.ItemModel;
 import com.viaversion.viaversion.api.minecraft.item.data.JukeboxPlayable;
+import com.viaversion.viaversion.api.minecraft.item.data.JukeboxPlayable.JukeboxSong;
 import com.viaversion.viaversion.api.minecraft.item.data.KineticWeapon;
 import com.viaversion.viaversion.api.minecraft.item.data.LockCode;
 import com.viaversion.viaversion.api.minecraft.item.data.LodestoneTracker;
 import com.viaversion.viaversion.api.minecraft.item.data.PiercingWeapon;
 import com.viaversion.viaversion.api.minecraft.item.data.PotDecorations;
 import com.viaversion.viaversion.api.minecraft.item.data.PotionContents;
+import com.viaversion.viaversion.api.minecraft.item.data.ProvidesBannerPatterns;
 import com.viaversion.viaversion.api.minecraft.item.data.ProvidesTrimMaterial;
 import com.viaversion.viaversion.api.minecraft.item.data.Repairable;
 import com.viaversion.viaversion.api.minecraft.item.data.SuspiciousStewEffect;
@@ -98,8 +102,8 @@ import com.viaversion.viaversion.util.Unit;
  * Holds data component keys.
  *
  * @param identifier string identifier
- * @param type data type
- * @param <T> data type
+ * @param type       data type
+ * @param <T>        data type
  * @see VersionedTypes
  */
 public record StructuredDataKey<T>(String identifier, Type<T> type) {
@@ -113,7 +117,8 @@ public record StructuredDataKey<T>(String identifier, Type<T> type) {
     public static final StructuredDataKey<Unit> UNBREAKABLE1_21_5 = new StructuredDataKey<>("unbreakable", Types.EMPTY);
     public static final StructuredDataKey<Tag> CUSTOM_NAME = new StructuredDataKey<>("custom_name", Types.TEXT_COMPONENT_TAG);
     public static final StructuredDataKey<Float> MINIMUM_ATTACK_CHARGE = new StructuredDataKey<>("minimum_attack_charge", Types.FLOAT);
-    public static final StructuredDataKey<DamageType> DAMAGE_TYPE = new StructuredDataKey<>("damage_type", DamageType.TYPE);
+    public static final StructuredDataKey<DamageType> DAMAGE_TYPE1_21_11 = new StructuredDataKey<>("damage_type", DamageType.TYPE1_21_11);
+    public static final StructuredDataKey<Integer> DAMAGE_TYPE26_1 = new StructuredDataKey<>("damage_type", new SynchronizedRegistryValueType(RegistryKey.of("damage_type")));
     public static final StructuredDataKey<Tag> ITEM_NAME = new StructuredDataKey<>("item_name", Types.TEXT_COMPONENT_TAG);
     public static final StructuredDataKey<ItemModel> ITEM_MODEL = new StructuredDataKey<>("item_model", ItemModel.TYPE);
     public static final StructuredDataKey<Tag[]> LORE = new StructuredDataKey<>("lore", new ArrayType<>(Types.TEXT_COMPONENT_TAG, 256));
@@ -142,7 +147,8 @@ public record StructuredDataKey<T>(String identifier, Type<T> type) {
     public static final StructuredDataKey<Consumable1_21_2> CONSUMABLE1_21_2 = new StructuredDataKey<>("consumable", Consumable1_21_2.TYPE);
     public static final StructuredDataKey<UseCooldown> USE_COOLDOWN = new StructuredDataKey<>("use_cooldown", UseCooldown.TYPE);
     public static final StructuredDataKey<Unit> FIRE_RESISTANT = new StructuredDataKey<>("fire_resistant", Types.EMPTY);
-    public static final StructuredDataKey<DamageResistant> DAMAGE_RESISTANT = new StructuredDataKey<>("damage_resistant", DamageResistant.TYPE);
+    public static final StructuredDataKey<DamageResistant1_21_2> DAMAGE_RESISTANT1_21_2 = new StructuredDataKey<>("damage_resistant", DamageResistant1_21_2.TYPE);
+    public static final StructuredDataKey<DamageResistant26_1> DAMAGE_RESISTANT26_1 = new StructuredDataKey<>("damage_resistant", DamageResistant26_1.TYPE);
     public static final StructuredDataKey<ToolProperties> TOOL1_20_5 = new StructuredDataKey<>("tool", ToolProperties.TYPE1_20_5);
     public static final StructuredDataKey<ToolProperties> TOOL1_21_5 = new StructuredDataKey<>("tool", ToolProperties.TYPE1_21_5);
     public static final StructuredDataKey<Weapon> WEAPON = new StructuredDataKey<>("weapon", Weapon.TYPE);
@@ -155,12 +161,15 @@ public record StructuredDataKey<T>(String identifier, Type<T> type) {
     public static final StructuredDataKey<Unit> GLIDER = new StructuredDataKey<>("glider", Types.EMPTY);
     public static final StructuredDataKey<Key> TOOLTIP_STYLE = new StructuredDataKey<>("tooltip_style", Types.IDENTIFIER);
     public static final StructuredDataKey<DeathProtection> DEATH_PROTECTION = new StructuredDataKey<>("death_protection", DeathProtection.TYPE);
-    public static final StructuredDataKey<BlocksAttacks> BLOCKS_ATTACKS = new StructuredDataKey<>("blocks_attacks", BlocksAttacks.TYPE);
+    public static final StructuredDataKey<BlocksAttacks> BLOCKS_ATTACKS1_21_5 = new StructuredDataKey<>("blocks_attacks", BlocksAttacks.TYPE1_21_5);
+    public static final StructuredDataKey<BlocksAttacks> BLOCKS_ATTACKS26_1 = new StructuredDataKey<>("blocks_attacks", BlocksAttacks.TYPE26_1);
     public static final StructuredDataKey<PiercingWeapon> PIERCING_WEAPON = new StructuredDataKey<>("piercing_weapon", PiercingWeapon.TYPE);
     public static final StructuredDataKey<KineticWeapon> KINETIC_WEAPON = new StructuredDataKey<>("kinetic_weapon", KineticWeapon.TYPE);
     public static final StructuredDataKey<SwingAnimation> SWING_ANIMATION = new StructuredDataKey<>("swing_animation", SwingAnimation.TYPE);
+    public static final StructuredDataKey<Integer> ADDITIONAL_TRADE_COST = new StructuredDataKey<>("additional_trade_cost", Types.VAR_INT);
     public static final StructuredDataKey<Enchantments> STORED_ENCHANTMENTS1_20_5 = new StructuredDataKey<>("stored_enchantments", Enchantments.TYPE1_20_5);
     public static final StructuredDataKey<Enchantments> STORED_ENCHANTMENTS1_21_5 = new StructuredDataKey<>("stored_enchantments", Enchantments.TYPE1_21_5);
+    public static final StructuredDataKey<Integer> DYE = new StructuredDataKey<>("dye", EnumTypes.DYE_COLOR);
     public static final StructuredDataKey<DyedColor> DYED_COLOR1_20_5 = new StructuredDataKey<>("dyed_color", DyedColor.TYPE1_20_5);
     public static final StructuredDataKey<DyedColor> DYED_COLOR1_21_5 = new StructuredDataKey<>("dyed_color", DyedColor.TYPE1_21_5);
     public static final StructuredDataKey<Integer> MAP_COLOR = new StructuredDataKey<>("map_color", Types.INT);
@@ -186,11 +195,15 @@ public record StructuredDataKey<T>(String identifier, Type<T> type) {
     public static final StructuredDataKey<Holder<Instrument1_20_5>> INSTRUMENT1_20_5 = new StructuredDataKey<>("instrument", Instrument1_20_5.TYPE);
     public static final StructuredDataKey<Holder<Instrument1_21_2>> INSTRUMENT1_21_2 = new StructuredDataKey<>("instrument", Instrument1_21_2.TYPE);
     public static final StructuredDataKey<EitherHolder<Instrument1_21_2>> INSTRUMENT1_21_5 = new StructuredDataKey<>("instrument", Instrument1_21_2.EITHER_HOLDER_TYPE);
-    public static final StructuredDataKey<ProvidesTrimMaterial> PROVIDES_TRIM_MATERIAL = new StructuredDataKey<>("provides_trim_material", ProvidesTrimMaterial.TYPE);
+    public static final StructuredDataKey<Holder<Instrument1_21_2>> INSTRUMENT26_1 = new StructuredDataKey<>("instrument", Instrument1_21_2.TYPE);
+    public static final StructuredDataKey<ProvidesTrimMaterial> PROVIDES_TRIM_MATERIAL1_21_5 = new StructuredDataKey<>("provides_trim_material", ProvidesTrimMaterial.TYPE);
+    public static final StructuredDataKey<Holder<ArmorTrimMaterial>> PROVIDES_TRIM_MATERIAL26_1 = new StructuredDataKey<>("provides_trim_material", ArmorTrimMaterial.TYPE1_21_5);
     public static final StructuredDataKey<Integer> OMINOUS_BOTTLE_AMPLIFIER = new StructuredDataKey<>("ominous_bottle_amplifier", Types.VAR_INT);
     public static final StructuredDataKey<JukeboxPlayable> JUKEBOX_PLAYABLE1_21 = new StructuredDataKey<>("jukebox_playable", JukeboxPlayable.TYPE1_21);
     public static final StructuredDataKey<JukeboxPlayable> JUKEBOX_PLAYABLE1_21_5 = new StructuredDataKey<>("jukebox_playable", JukeboxPlayable.TYPE1_21_5);
-    public static final StructuredDataKey<Key> PROVIDES_BANNER_PATTERNS = new StructuredDataKey<>("provides_banner_patterns", Types.TAG_KEY);
+    public static final StructuredDataKey<Holder<JukeboxSong>> JUKEBOX_PLAYABLE26_1 = new StructuredDataKey<>("jukebox_playable", JukeboxSong.TYPE);
+    public static final StructuredDataKey<Key> PROVIDES_BANNER_PATTERNS1_21_5 = new StructuredDataKey<>("provides_banner_patterns", Types.TAG_KEY);
+    public static final StructuredDataKey<ProvidesBannerPatterns> PROVIDES_BANNER_PATTERNS26_1 = new StructuredDataKey<>("provides_banner_patterns", ProvidesBannerPatterns.TYPE);
     public static final StructuredDataKey<Tag> RECIPES = new StructuredDataKey<>("recipes", Types.TAG);
     public static final StructuredDataKey<LodestoneTracker> LODESTONE_TRACKER = new StructuredDataKey<>("lodestone_tracker", LodestoneTracker.TYPE);
     public static final StructuredDataKey<FireworkExplosion> FIREWORK_EXPLOSION = new StructuredDataKey<>("firework_explosion", FireworkExplosion.TYPE);
@@ -223,8 +236,10 @@ public record StructuredDataKey<T>(String identifier, Type<T> type) {
     public static final StructuredDataKey<Integer> RABBIT_VARIANT = new StructuredDataKey<>("rabbit/variant", EnumTypes.RABBIT_VARIANT);
     public static final StructuredDataKey<Integer> PIG_VARIANT = new StructuredDataKey<>("pig/variant", new SynchronizedRegistryValueType(RegistryKey.of("pig_variant")));
     public static final StructuredDataKey<Integer> COW_VARIANT = new StructuredDataKey<>("cow/variant", new SynchronizedRegistryValueType(RegistryKey.of("cow_variant")));
-    public static final StructuredDataKey<Either<Integer, String>> CHICKEN_VARIANT = new StructuredDataKey<>("chicken/variant", new SynchronizedRegistryEitherType(RegistryKey.of("chicken_variant")));
-    public static final StructuredDataKey<Either<Integer, String>> ZOMBIE_NAUTILUS_VARIANT = new StructuredDataKey<>("zombie_nautilus/variant", new SynchronizedRegistryEitherType(RegistryKey.of("zombie_nautilus_variant"))); // ???
+    public static final StructuredDataKey<Either<Integer, String>> CHICKEN_VARIANT1_21_5 = new StructuredDataKey<>("chicken/variant", new SynchronizedRegistryEitherType(RegistryKey.of("chicken_variant")));
+    public static final StructuredDataKey<Integer> CHICKEN_VARIANT26_1 = new StructuredDataKey<>("chicken/variant", new SynchronizedRegistryValueType(RegistryKey.of("chicken_variant")));
+    public static final StructuredDataKey<Either<Integer, String>> ZOMBIE_NAUTILUS_VARIANT1_21_11 = new StructuredDataKey<>("zombie_nautilus/variant", new SynchronizedRegistryEitherType(RegistryKey.of("zombie_nautilus_variant"))); // ???
+    public static final StructuredDataKey<Integer> ZOMBIE_NAUTILUS_VARIANT26_1 = new StructuredDataKey<>("zombie_nautilus/variant", new SynchronizedRegistryValueType(RegistryKey.of("zombie_nautilus_variant")));
     public static final StructuredDataKey<Integer> FROG_VARIANT = new StructuredDataKey<>("frog/variant", new SynchronizedRegistryValueType(RegistryKey.of("frog_variant")));
     public static final StructuredDataKey<Integer> HORSE_VARIANT = new StructuredDataKey<>("horse/variant", EnumTypes.HORSE_VARIANT);
     public static final StructuredDataKey<Holder<PaintingVariant>> PAINTING_VARIANT = new StructuredDataKey<>("painting/variant", PaintingVariant.TYPE1_21_2);
@@ -234,6 +249,10 @@ public record StructuredDataKey<T>(String identifier, Type<T> type) {
     public static final StructuredDataKey<Integer> CAT_COLLAR = new StructuredDataKey<>("cat/collar", EnumTypes.DYE_COLOR);
     public static final StructuredDataKey<Integer> SHEEP_COLOR = new StructuredDataKey<>("sheep/color", EnumTypes.DYE_COLOR);
     public static final StructuredDataKey<Integer> SHULKER_COLOR = new StructuredDataKey<>("shulker/color", EnumTypes.DYE_COLOR);
+    public static final StructuredDataKey<Integer> PIG_SOUND_VARIANT = new StructuredDataKey<>("pig/sound_variant", new SynchronizedRegistryValueType(RegistryKey.of("pig_sound_variant")));
+    public static final StructuredDataKey<Integer> COW_SOUND_VARIANT = new StructuredDataKey<>("cow/sound_variant", new SynchronizedRegistryValueType(RegistryKey.of("cow_sound_variant")));
+    public static final StructuredDataKey<Integer> CHICKEN_SOUND_VARIANT = new StructuredDataKey<>("chicken/sound_variant", new SynchronizedRegistryValueType(RegistryKey.of("chicken_sound_variant")));
+    public static final StructuredDataKey<Integer> CAT_SOUND_VARIANT = new StructuredDataKey<>("cat/sound_variant", new SynchronizedRegistryValueType(RegistryKey.of("cat_sound_variant")));
 
     // These are only safe to use after protocol loading
     public static final StructuredDataKeys1_20_5 V1_20_5 = VersionedTypes.V1_20_5.structuredDataKeys();

api/src/main/java/com/viaversion/viaversion/api/minecraft/data/version/StructuredDataKeys1_21_2.java

@@ -35,9 +35,9 @@ public class StructuredDataKeys1_21_2 extends VersionedStructuredDataKeys {
     public final StructuredDataKey<Item> useRemainder;
 
     public StructuredDataKeys1_21_2(final VersionedTypesHolder types) {
-        this.container = add("container", new ContainerContentsType(types.item()));
-        this.chargedProjectiles = add("charged_projectiles", types.itemArray());
-        this.bundleContents = add("bundle_contents", types.itemArray());
-        this.useRemainder = add("use_remainder", types.item());
+        this.container = add("container", new ContainerContentsType(types.optionalItemTemplate()));
+        this.chargedProjectiles = add("charged_projectiles", types.itemTemplateArray());
+        this.bundleContents = add("bundle_contents", types.itemTemplateArray());
+        this.useRemainder = add("use_remainder", types.itemTemplate());
     }
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/entitydata/types/EntityDataTypes1_21_11.java

@@ -47,7 +47,7 @@ public final class EntityDataTypes1_21_11 extends AbstractEntityDataTypes {
     public final EntityDataType optionalBlockStateType = add(15, Types.VAR_INT);
     public final EntityDataType particleType;
     public final EntityDataType particlesType;
-    public final EntityDataType villagerDatatType = add(18, Types.VILLAGER_DATA);
+    public final EntityDataType villagerDataType = add(18, Types.VILLAGER_DATA);
     public final EntityDataType optionalVarIntType = add(19, Types.OPTIONAL_VAR_INT);
     public final EntityDataType poseType = add(20, Types.VAR_INT);
     public final EntityDataType catVariantType = add(21, Types.VAR_INT);

api/src/main/java/com/viaversion/viaversion/api/minecraft/entitydata/types/EntityDataTypes26_1.java

@@ -0,0 +1,82 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.minecraft.entitydata.types;
+
+import com.viaversion.viaversion.api.minecraft.PaintingVariant;
+import com.viaversion.viaversion.api.minecraft.entitydata.EntityDataType;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.api.type.types.version.VersionedTypesHolder;
+
+public final class EntityDataTypes26_1 extends AbstractEntityDataTypes {
+
+    public final EntityDataType byteType = add(0, Types.BYTE);
+    public final EntityDataType varIntType = add(1, Types.VAR_INT);
+    public final EntityDataType longType = add(2, Types.VAR_LONG);
+    public final EntityDataType floatType = add(3, Types.FLOAT);
+    public final EntityDataType stringType = add(4, Types.STRING);
+    public final EntityDataType componentType = add(5, Types.TRUSTED_TAG);
+    public final EntityDataType optionalComponentType = add(6, Types.TRUSTED_OPTIONAL_TAG);
+    public final EntityDataType itemType;
+    public final EntityDataType booleanType = add(8, Types.BOOLEAN);
+    public final EntityDataType rotationsType = add(9, Types.ROTATIONS);
+    public final EntityDataType blockPositionType = add(10, Types.BLOCK_POSITION1_14);
+    public final EntityDataType optionalBlockPositionType = add(11, Types.OPTIONAL_POSITION_1_14);
+    public final EntityDataType directionType = add(12, Types.VAR_INT);
+    public final EntityDataType optionalUUIDType = add(13, Types.OPTIONAL_UUID);
+    public final EntityDataType blockStateType = add(14, Types.VAR_INT);
+    public final EntityDataType optionalBlockStateType = add(15, Types.VAR_INT);
+    public final EntityDataType particleType;
+    public final EntityDataType particlesType;
+    public final EntityDataType villagerDataType = add(18, Types.VILLAGER_DATA);
+    public final EntityDataType optionalVarIntType = add(19, Types.OPTIONAL_VAR_INT);
+    public final EntityDataType poseType = add(20, Types.VAR_INT);
+    public final EntityDataType catVariantType = add(21, Types.VAR_INT);
+    public final EntityDataType catSoundVariant = add(22, Types.VAR_INT);
+    public final EntityDataType cowVariantType = add(23, Types.VAR_INT);
+    public final EntityDataType cowSoundVariant = add(24, Types.VAR_INT);
+    public final EntityDataType wolfVariantType = add(25, Types.VAR_INT);
+    public final EntityDataType wolfSoundVariantType = add(26, Types.VAR_INT);
+    public final EntityDataType frogVariantType = add(27, Types.VAR_INT);
+    public final EntityDataType pigVariantType = add(28, Types.VAR_INT);
+    public final EntityDataType pigSoundVariant = add(29, Types.VAR_INT);
+    public final EntityDataType chickenVariantType = add(30, Types.VAR_INT);
+    public final EntityDataType chickenSoundVariant = add(31, Types.VAR_INT);
+    public final EntityDataType zombieNautilusVariantType = add(32, Types.VAR_INT);
+    public final EntityDataType optionalGlobalPosition = add(33, Types.OPTIONAL_GLOBAL_POSITION);
+    public final EntityDataType paintingVariantType = add(34, PaintingVariant.TYPE1_21_2);
+    public final EntityDataType snifferState = add(35, Types.VAR_INT);
+    public final EntityDataType armadilloState = add(36, Types.VAR_INT);
+    public final EntityDataType copperGolemState = add(37, Types.VAR_INT);
+    public final EntityDataType weatheringCopperState = add(38, Types.VAR_INT);
+    public final EntityDataType vector3FType = add(39, Types.VECTOR3F);
+    public final EntityDataType quaternionType = add(40, Types.QUATERNION);
+    public final EntityDataType mannequinProfileType = add(41, Types.RESOLVABLE_PROFILE);
+    public final EntityDataType humanoidArmType = add(42, Types.VAR_INT);
+
+    public EntityDataTypes26_1(final VersionedTypesHolder types) {
+        super(43);
+        this.itemType = add(7, types.item());
+        this.particleType = add(16, types.particle());
+        this.particlesType = add(17, types.particles());
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/Item.java

@@ -76,4 +76,23 @@ public interface Item extends ItemBase {
      */
     @Override
     Item copy();
+
+    /**
+     * Returns whether the item is a template item.
+     *
+     * @return whether the item is a template item
+     */
+    default boolean isTemplate() {
+        return false;
+    }
+
+    /**
+     * Returns whether the item is null or empty.
+     *
+     * @param item item
+     * @return whether the item is null or empty
+     */
+    static boolean isEmpty(@Nullable final Item item) {
+        return item == null || item.isEmpty();
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/StructuredItemTemplate.java

@@ -0,0 +1,59 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.minecraft.item;
+
+import com.google.common.base.Preconditions;
+import com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;
+
+public class StructuredItemTemplate extends StructuredItem {
+
+    public StructuredItemTemplate(final int identifier, final int amount) {
+        super(identifier, amount, new StructuredDataContainer());
+    }
+
+    public StructuredItemTemplate(final int identifier, final int amount, final StructuredDataContainer data) {
+        super(identifier, amount, data);
+    }
+
+    @Override
+    public void setIdentifier(final int identifier) {
+        Preconditions.checkArgument(identifier > 0, "Template item cannot be empty");
+        super.setIdentifier(identifier);
+    }
+
+    @Override
+    public void setAmount(final int amount) {
+        Preconditions.checkArgument(amount > 0, "Template item cannot be empty");
+        super.setAmount(amount);
+    }
+
+    @Override
+    public boolean isTemplate() {
+        return true;
+    }
+
+    @Override
+    public StructuredItemTemplate copy() {
+        return new StructuredItemTemplate(identifier(), amount(), dataContainer().copy());
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/AttackRange.java

@@ -56,8 +56,8 @@ public record AttackRange(float minRange, float maxRange,
         @Override
         public void write(final Ops ops, final AttackRange AttackRange) {
             ops.writeMap(map -> map
-                .writeOptional("min_range", Types.FLOAT, AttackRange.minRange, 0F)
-                .writeOptional("max_range", Types.FLOAT, AttackRange.maxRange, 3F)
+                .writeOptional("min_reach", Types.FLOAT, AttackRange.minRange, 0F)
+                .writeOptional("max_reach", Types.FLOAT, AttackRange.maxRange, 3F)
                 .writeOptional("min_creative_reach", Types.FLOAT, AttackRange.minCreativeRange, 0F)
                 .writeOptional("max_creative_reach", Types.FLOAT, AttackRange.maxCreativeRange, 5F)
                 .writeOptional("hitbox_margin", Types.FLOAT, AttackRange.hitboxMargin, 0.3F)

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/AttributeModifiers1_21.java

@@ -37,6 +37,7 @@ import io.netty.buffer.ByteBuf;
 import it.unimi.dsi.fastutil.ints.Int2IntFunction;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 
 public record AttributeModifiers1_21(AttributeModifier[] modifiers, boolean showInTooltip) implements Copyable, Rewritable {
 
@@ -226,7 +227,7 @@ public record AttributeModifiers1_21(AttributeModifier[] modifiers, boolean show
     }
 
     public static class Display implements Copyable {
-        public static final String[] DISPLAY_TYPES = {"default", "hidden", "override_text"};
+        public static final String[] DISPLAY_TYPES = {"default", "hidden", "override"};
         public static final Display DEFAULT = new Display(0);
         private final int id;
 
@@ -246,6 +247,17 @@ public record AttributeModifiers1_21(AttributeModifier[] modifiers, boolean show
         public Display copy() {
             return this;
         }
+
+        @Override
+        public boolean equals(final Object o) {
+            if (!(o instanceof final Display display)) return false;
+            return id == display.id;
+        }
+
+        @Override
+        public int hashCode() {
+            return id;
+        }
     }
 
     public static final class OverrideText extends Display {
@@ -271,5 +283,19 @@ public record AttributeModifiers1_21(AttributeModifier[] modifiers, boolean show
         public OverrideText copy() {
             return new OverrideText(this.component.copy());
         }
+
+        @Override
+        public boolean equals(final Object o) {
+            if (!(o instanceof final OverrideText that)) return false;
+            if (!super.equals(o)) return false;
+            return Objects.equals(component, that.component);
+        }
+
+        @Override
+        public int hashCode() {
+            int result = super.hashCode();
+            result = 31 * result + Objects.hashCode(component);
+            return result;
+        }
     }
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/BlocksAttacks.java

@@ -43,12 +43,12 @@ public record BlocksAttacks(
     float disableCooldownScale,
     DamageReduction[] damageReductions,
     ItemDamageFunction itemDamage,
-    @Nullable String bypassedByTag,
+    @Nullable HolderSet bypassedBy, // always a tag before 26.1
     @Nullable Holder<SoundEvent> blockSound,
     @Nullable Holder<SoundEvent> disableSound
 ) implements Rewritable {
 
-    public static final Type<BlocksAttacks> TYPE = new Type<>(BlocksAttacks.class) {
+    public static final Type<BlocksAttacks> TYPE1_21_5 = new Type<>(BlocksAttacks.class) {
 
         @Override
         public BlocksAttacks read(final ByteBuf buffer) {
@@ -59,7 +59,7 @@ public record BlocksAttacks(
             final String bypassedByTag = Types.OPTIONAL_STRING.read(buffer);
             final Holder<SoundEvent> blockSound = Types.OPTIONAL_SOUND_EVENT.read(buffer);
             final Holder<SoundEvent> disableSound = Types.OPTIONAL_SOUND_EVENT.read(buffer);
-            return new BlocksAttacks(blockDelaySeconds, disableCooldownScale, damageReductions, itemDamage, bypassedByTag, blockSound, disableSound);
+            return new BlocksAttacks(blockDelaySeconds, disableCooldownScale, damageReductions, itemDamage, bypassedByTag != null ? HolderSet.of(bypassedByTag) : null, blockSound, disableSound);
         }
 
         @Override
@@ -68,7 +68,7 @@ public record BlocksAttacks(
             buffer.writeFloat(value.disableCooldownScale());
             DamageReduction.ARRAY_TYPE.write(buffer, value.damageReductions());
             ItemDamageFunction.TYPE.write(buffer, value.itemDamage());
-            Types.OPTIONAL_STRING.write(buffer, value.bypassedByTag());
+            Types.OPTIONAL_STRING.write(buffer, value.bypassedBy() != null ? value.bypassedBy().tagKey() : null);
             Types.OPTIONAL_SOUND_EVENT.write(buffer, value.blockSound());
             Types.OPTIONAL_SOUND_EVENT.write(buffer, value.disableSound());
         }
@@ -82,7 +82,47 @@ public record BlocksAttacks(
                 .writeOptional("disable_cooldown_scale", Types.FLOAT, value.disableCooldownScale(), 1F)
                 .writeOptional("damage_reductions", DamageReduction.ARRAY_TYPE, value.damageReductions(), defaultDamageReductions)
                 .writeOptional("item_damage", ItemDamageFunction.TYPE, value.itemDamage(), defaultItemDamage)
-                .writeOptional("bypassed_by", Types.TAG_KEY, value.bypassedByTag() != null ? Key.of(value.bypassedByTag()) : null)
+                .writeOptional("bypassed_by", Types.TAG_KEY, value.bypassedBy() != null ? Key.of(value.bypassedBy().tagKey()) : null)
+                .writeOptional("block_sound", Types.SOUND_EVENT, value.blockSound())
+                .writeOptional("disabled_sound", Types.SOUND_EVENT, value.disableSound()));
+        }
+    };
+
+    public static final Type<BlocksAttacks> TYPE26_1 = new Type<>(BlocksAttacks.class) {
+
+        @Override
+        public BlocksAttacks read(final ByteBuf buffer) {
+            final float blockDelaySeconds = buffer.readFloat();
+            final float disableCooldownScale = buffer.readFloat();
+            final DamageReduction[] damageReductions = DamageReduction.ARRAY_TYPE.read(buffer);
+            final ItemDamageFunction itemDamage = ItemDamageFunction.TYPE.read(buffer);
+            final HolderSet bypassedByTag = Types.OPTIONAL_HOLDER_SET.read(buffer);
+            final Holder<SoundEvent> blockSound = Types.OPTIONAL_SOUND_EVENT.read(buffer);
+            final Holder<SoundEvent> disableSound = Types.OPTIONAL_SOUND_EVENT.read(buffer);
+            return new BlocksAttacks(blockDelaySeconds, disableCooldownScale, damageReductions, itemDamage, bypassedByTag, blockSound, disableSound);
+        }
+
+        @Override
+        public void write(final ByteBuf buffer, final BlocksAttacks value) {
+            buffer.writeFloat(value.blockDelaySeconds());
+            buffer.writeFloat(value.disableCooldownScale());
+            DamageReduction.ARRAY_TYPE.write(buffer, value.damageReductions());
+            ItemDamageFunction.TYPE.write(buffer, value.itemDamage());
+            Types.OPTIONAL_HOLDER_SET.write(buffer, value.bypassedBy());
+            Types.OPTIONAL_SOUND_EVENT.write(buffer, value.blockSound());
+            Types.OPTIONAL_SOUND_EVENT.write(buffer, value.disableSound());
+        }
+
+        @Override
+        public void write(final Ops ops, final BlocksAttacks value) {
+            final DamageReduction[] defaultDamageReductions = {new DamageReduction(90, null, 0, 1)};
+            final ItemDamageFunction defaultItemDamage = new ItemDamageFunction(1, 0, 1);
+            ops.writeMap(map -> map
+                .writeOptional("block_delay_seconds", Types.FLOAT, value.blockDelaySeconds(), 0F)
+                .writeOptional("disable_cooldown_scale", Types.FLOAT, value.disableCooldownScale(), 1F)
+                .writeOptional("damage_reductions", DamageReduction.ARRAY_TYPE, value.damageReductions(), defaultDamageReductions)
+                .writeOptional("item_damage", ItemDamageFunction.TYPE, value.itemDamage(), defaultItemDamage)
+                .writeOptional("bypassed_by", Types.HOLDER_SET, value.bypassedBy())
                 .writeOptional("block_sound", Types.SOUND_EVENT, value.blockSound())
                 .writeOptional("disabled_sound", Types.SOUND_EVENT, value.disableSound()));
         }
@@ -92,7 +132,7 @@ public record BlocksAttacks(
     public BlocksAttacks rewrite(final UserConnection connection, final Protocol<?, ?, ?, ?> protocol, final boolean clientbound) {
         final Holder<SoundEvent> blockSound = SoundEvent.rewriteHolder(this.blockSound, Rewritable.soundRewriteFunction(protocol, clientbound));
         final Holder<SoundEvent> disableSound = SoundEvent.rewriteHolder(this.disableSound, Rewritable.soundRewriteFunction(protocol, clientbound));
-        return new BlocksAttacks(this.blockDelaySeconds, this.disableCooldownScale, this.damageReductions, this.itemDamage, this.bypassedByTag, blockSound, disableSound);
+        return new BlocksAttacks(this.blockDelaySeconds, this.disableCooldownScale, this.damageReductions, this.itemDamage, this.bypassedBy, blockSound, disableSound);
     }
 
     public record DamageReduction(float horizontalBlockingAngle, @Nullable HolderSet type, float base, float factor) {

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/ContainterContents.java

@@ -44,7 +44,7 @@ public final class ContainterContents {
             ops.writeList(list -> {
                 for (int i = 0; i < value.length; i++) {
                     final Item item = value[i];
-                    if (item.isEmpty()) {
+                    if (item == null || item.isEmpty()) {
                         continue;
                     }
 

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/DamageResistant1_21_2.java

@@ -28,12 +28,12 @@ import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.util.Key;
 
-public record DamageResistant(Key typesTagKey) {
+public record DamageResistant1_21_2(Key typesTagKey) {
 
-    public static final Type<DamageResistant> TYPE = new TransformingType<>(Types.IDENTIFIER, DamageResistant.class, DamageResistant::new, DamageResistant::typesTagKey) {
+    public static final Type<DamageResistant1_21_2> TYPE = new TransformingType<>(Types.IDENTIFIER, DamageResistant1_21_2.class, DamageResistant1_21_2::new, DamageResistant1_21_2::typesTagKey) {
 
         @Override
-        public void write(final Ops ops, final DamageResistant value) {
+        public void write(final Ops ops, final DamageResistant1_21_2 value) {
             ops.writeMap(map -> map.write("types", Types.TAG_KEY, value.typesTagKey));
         }
     };

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/DamageResistant26_1.java

@@ -0,0 +1,40 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.minecraft.item.data;
+
+import com.viaversion.viaversion.api.minecraft.HolderSet;
+import com.viaversion.viaversion.api.minecraft.codec.Ops;
+import com.viaversion.viaversion.api.type.TransformingType;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.Types;
+
+public record DamageResistant26_1(HolderSet types) {
+
+    public static final Type<DamageResistant26_1> TYPE = new TransformingType<>(Types.HOLDER_SET, DamageResistant26_1.class, DamageResistant26_1::new, DamageResistant26_1::types) {
+
+        @Override
+        public void write(final Ops ops, final DamageResistant26_1 value) {
+            ops.writeMap(map -> map.write("types", Types.HOLDER_SET, value.types));
+        }
+    };
+}

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/DamageType.java

@@ -28,7 +28,12 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.EitherType;
 import com.viaversion.viaversion.util.Either;
 
+/**
+ * 1.21.11-only damage type.
+ *
+ * @param id registry int or string id
+ */
 public record DamageType(Either<Integer, String> id) {
 
-    public static final Type<DamageType> TYPE = TransformingType.of(new EitherType<>(Types.VAR_INT, Types.STRING), DamageType.class, DamageType::new, DamageType::id);
+    public static final Type<DamageType> TYPE1_21_11 = TransformingType.of(new EitherType<>(Types.VAR_INT, Types.STRING), DamageType.class, DamageType::new, DamageType::id);
 }

api/src/main/java/com/viaversion/viaversion/api/minecraft/item/data/ProvidesBannerPatterns.java

@@ -0,0 +1,34 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.minecraft.item.data;
+
+import com.viaversion.viaversion.api.minecraft.HolderSet;
+import com.viaversion.viaversion.api.minecraft.RegistryKey;
+import com.viaversion.viaversion.api.type.TransformingType;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.types.misc.HolderSetType;
+
+public record ProvidesBannerPatterns(HolderSet patterns) {
+
+    public static final Type<ProvidesBannerPatterns> TYPE = TransformingType.of(new HolderSetType(RegistryKey.of("banner_pattern")), ProvidesBannerPatterns.class, ProvidesBannerPatterns::new, ProvidesBannerPatterns::patterns);
+}

api/src/main/java/com/viaversion/viaversion/api/platform/ViaPlatform.java

@@ -165,6 +165,30 @@ public interface ViaPlatform<T> {
         return false;
     }
 
+    /**
+     * Modify the player details payload before it is sent.
+     * This method allows adding, changing, or removing fields from the payload.
+     * It is only called if {@link ViaVersionConfig#sendPlayerDetails()} is true.
+     *
+     * @param connection The UserConnection
+     * @param payload    The constructed payload to modify
+     */
+    default void modifyPlayerDetails(UserConnection connection, JsonObject payload) {
+        // To be overridden if needed
+    }
+
+    /**
+     * Modify the server details payload before it is sent.
+     * This method allows adding, changing, or removing fields from the payload.
+     * It is only called if {@link ViaVersionConfig#sendServerDetails()} is true.
+     *
+     * @param connection The UserConnection
+     * @param payload    The constructed payload to modify
+     */
+    default void modifyServerDetails(UserConnection connection, JsonObject payload) {
+        // To be overridden if needed
+    }
+
     /**
      * Send a custom payload to from a player to the server.
      *

api/src/main/java/com/viaversion/viaversion/api/protocol/Protocol.java

@@ -68,10 +68,6 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
         registerServerbound(state, packetType.getId(), packetType.getId(), handler, false);
     }
 
-    default void registerServerbound(State state, int unmappedPacketId, int mappedPacketId, @Nullable PacketHandler handler) {
-        registerServerbound(state, unmappedPacketId, mappedPacketId, handler, false);
-    }
-
     /**
      * Registers a serverbound packet, with id transformation and remapper.
      *
@@ -79,19 +75,17 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
      * @param unmappedPacketId unmapped packet id
      * @param mappedPacketId   mapped packet id
      * @param handler          packet handler
-     * @param override         whether an existing mapper should be overridden
      * @see #registerServerbound(ServerboundPacketType, ServerboundPacketType, PacketHandler, boolean)
      */
+    default void registerServerbound(State state, int unmappedPacketId, int mappedPacketId, @Nullable PacketHandler handler) {
+        registerServerbound(state, unmappedPacketId, mappedPacketId, handler, false);
+    }
+
+    @Deprecated(forRemoval = true)
     void registerServerbound(State state, int unmappedPacketId, int mappedPacketId, @Nullable PacketHandler handler, boolean override);
 
     void cancelServerbound(State state, int mappedPacketId);
 
-    default void registerClientbound(State state, int unmappedPacketId, int mappedPacketId, @Nullable PacketHandler handler) {
-        registerClientbound(state, unmappedPacketId, mappedPacketId, handler, false);
-    }
-
-    void cancelClientbound(State state, int unmappedPacketId);
-
     /**
      * Registers a clientbound packet, with id transformation and remapper.
      *
@@ -99,9 +93,15 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
      * @param unmappedPacketId unmapped packet id
      * @param mappedPacketId   mapped packet id
      * @param handler          packet handler
-     * @param override         whether an existing mapper should be overridden
      * @see #registerClientbound(ClientboundPacketType, ClientboundPacketType, PacketHandler, boolean)
      */
+    default void registerClientbound(State state, int unmappedPacketId, int mappedPacketId, @Nullable PacketHandler handler) {
+        registerClientbound(state, unmappedPacketId, mappedPacketId, handler, false);
+    }
+
+    void cancelClientbound(State state, int unmappedPacketId);
+
+    @Deprecated(forRemoval = true)
     void registerClientbound(State state, int unmappedPacketId, int mappedPacketId, @Nullable PacketHandler handler, boolean override);
 
     // ---------------------------------------------------------------------------------------
@@ -144,6 +144,7 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
      * @param handler          packet handler
      * @param override         whether an existing mapping should be overridden if present
      */
+    @Deprecated(forRemoval = true)
     void registerClientbound(CU packetType, @Nullable CM mappedPacketType, @Nullable PacketHandler handler, boolean override);
 
     /**
@@ -191,6 +192,7 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
      * @param handler          packet handler
      * @param override         whether an existing mapping should be overridden if present
      */
+    @Deprecated(forRemoval = true)
     void registerServerbound(SU packetType, @Nullable SM mappedPacketType, @Nullable PacketHandler handler, boolean override);
 
     /**
@@ -260,6 +262,22 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
      */
     void appendServerbound(SU type, PacketHandler handler);
 
+    /**
+     * Replaces a clientbound packet type handler with another.
+     *
+     * @param type    clientbound packet type
+     * @param handler packet handler
+     */
+    void replaceClientbound(CU type, @Nullable PacketHandler handler);
+
+    /**
+     * Replaces a serverbound packet type handler with another.
+     *
+     * @param type    serverbound packet type
+     * @param handler packet handler
+     */
+    void replaceServerbound(SU type, @Nullable PacketHandler handler);
+
     /**
      * Transform a packet using this protocol
      *
@@ -441,4 +459,13 @@ public interface Protocol<CU extends ClientboundPacketType, CM extends Clientbou
     default boolean isBaseProtocol() {
         return false;
     }
+
+    /**
+     * Marks this protocol as dependent on another. Before being initialized, it will wait for the dependency's completion.
+     *
+     * @return protocol class to depend on
+     */
+    default @Nullable Class<? extends Protocol<?, ?, ?, ?>> dependsOn() {
+        return null;
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/protocol/ProtocolManager.java

@@ -249,7 +249,17 @@ public interface ProtocolManager {
      *
      * @return true if the executor has now been shut down
      */
-    boolean checkForMappingCompletion();
+    default boolean checkForMappingCompletion() {
+        return checkForMappingCompletion(false);
+    }
+
+    /**
+     * Shuts down the executor and uncaches mappings if all futures have been completed.
+     *
+     * @param propagateErrors whether to propagate errors from the futures to the caller
+     * @return true if the executor has now been shut down
+     */
+    boolean checkForMappingCompletion(boolean propagateErrors);
 
     /**
      * Executes the given runnable asynchronously, adding a {@link CompletableFuture}

api/src/main/java/com/viaversion/viaversion/api/protocol/packet/PacketWrapper.java

@@ -328,6 +328,13 @@ public interface PacketWrapper {
      */
     void resetReader();
 
+    /**
+     * Rewind the reader by the given number of arguments, so they can be read again.
+     *
+     * @param values number of values to add to the reader dequeue again
+     */
+    void rewindReader(int values);
+
     /**
      * Sends this packet to the server.
      * <b>Unlike {@link #sendToServer(Class)}, this method does not handle the pipeline with packet id and data changes.</b>
@@ -382,12 +389,21 @@ public interface PacketWrapper {
      */
     void scheduleSendToServer(Class<? extends Protocol> protocol, boolean skipCurrentPipeline) throws InformativeException;
 
+    /**
+     * Allows running through code that may both read and write data to/from this packet wrapper,
+     * but will no-op any write call.
+     *
+     * @param runnable runnable to do further method calls on this packet wrapper
+     */
+    void consumeReadsOnly(Runnable runnable);
+
     /**
      * Returns the packet type, or null if not transformed or manually unset.
      *
      * @return packet type if set
      */
-    @Nullable PacketType getPacketType();
+    @Nullable
+    PacketType getPacketType();
 
     /**
      * Sets the packet type. If set to null, it will not be written to the buffer with {@link #writeToBuffer(ByteBuf)}.

api/src/main/java/com/viaversion/viaversion/api/protocol/packet/mapping/PacketIdMapping.java

@@ -50,6 +50,11 @@ final class PacketIdMapping implements PacketMapping {
         }
     }
 
+    @Override
+    public void setHandler(@Nullable final PacketHandler handler) {
+        this.handler = handler;
+    }
+
     @Override
     public @Nullable PacketHandler handler() {
         return handler;

api/src/main/java/com/viaversion/viaversion/api/protocol/packet/mapping/PacketMapping.java

@@ -39,6 +39,13 @@ public interface PacketMapping {
      */
     void applyType(PacketWrapper wrapper);
 
+    /**
+     * Replaces the current packet handler.
+     *
+     * @param handler packet transformer
+     */
+    void setHandler(@Nullable PacketHandler handler);
+
     /**
      * Returns a packet transformer to transform a packet from one protocol version to another.
      *

api/src/main/java/com/viaversion/viaversion/api/protocol/packet/mapping/PacketTypeMapping.java

@@ -52,6 +52,11 @@ final class PacketTypeMapping implements PacketMapping {
         }
     }
 
+    @Override
+    public void setHandler(@Nullable final PacketHandler handler) {
+        this.handler = handler;
+    }
+
     @Override
     public @Nullable PacketHandler handler() {
         return handler;

api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java

@@ -93,6 +93,7 @@ public class ProtocolVersion implements Comparable<ProtocolVersion> {
     public static final ProtocolVersion v1_21_7 = register(772, "1.21.7-1.21.8", new SubVersionRange("1.21", 7, 8));
     public static final ProtocolVersion v1_21_9 = register(773, "1.21.9-1.21.10", new SubVersionRange("1.21", 9, 10));
     public static final ProtocolVersion v1_21_11 = register(774, "1.21.11");
+    public static final ProtocolVersion v26_1 = register(775, "26.1-26.1.1", new SubVersionRange("26.1", 0, 1));
     public static final ProtocolVersion unknown = new ProtocolVersion(VersionType.SPECIAL, -1, -1, "UNKNOWN", null);
 
     static {

api/src/main/java/com/viaversion/viaversion/api/rewriter/ComponentRewriter.java

@@ -26,6 +26,7 @@ import com.google.gson.JsonElement;
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.nbt.tag.Tag;
 import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public interface ComponentRewriter {
@@ -37,4 +38,6 @@ public interface ComponentRewriter {
     JsonElement processText(UserConnection connection, @Nullable String json);
 
     void handleShowItem(UserConnection connection, CompoundTag itemTag);
+
+    void passthroughAndProcess(PacketWrapper wrapper);
 }

api/src/main/java/com/viaversion/viaversion/api/rewriter/EntityRewriter.java

@@ -28,6 +28,7 @@ import com.viaversion.viaversion.api.minecraft.entities.EntityType;
 import com.viaversion.viaversion.api.minecraft.entitydata.EntityData;
 import com.viaversion.viaversion.api.protocol.Protocol;
 import java.util.List;
+import org.checkerframework.checker.nullness.qual.Nullable;
 
 public interface EntityRewriter<T extends Protocol<?, ?, ?, ?>> extends Rewriter<T> {
 
@@ -39,6 +40,11 @@ public interface EntityRewriter<T extends Protocol<?, ?, ?, ?>> extends Rewriter
      */
     EntityType typeFromId(int type);
 
+    default @Nullable EntityType typeFromId(final String type) {
+        final int id = protocol().getMappingData().getEntityMappings().id(type);
+        return id == -1 ? null : typeFromId(id);
+    }
+
     /**
      * Returns the entity type from the given id.
      * From 1.14 and onwards, this is the same exact value as {@link #typeFromId(int)}.

api/src/main/java/com/viaversion/viaversion/api/rewriter/ItemRewriter.java

@@ -102,6 +102,16 @@ public interface ItemRewriter<T extends Protocol<?, ?, ?, ?>> extends Rewriter<T
         return itemArrayType();
     }
 
+    @Nullable
+    default Type<Item> itemTemplateType() {
+        return itemType();
+    }
+
+    @Nullable
+    default Type<Item> mappedItemTemplateType() {
+        return mappedItemType();
+    }
+
     /**
      * Returns the NBT tag name used for storing original item data.
      *

api/src/main/java/com/viaversion/viaversion/api/rewriter/RegistryDataRewriter.java

@@ -22,10 +22,22 @@
  */
 package com.viaversion.viaversion.api.rewriter;
 
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
+import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.util.KeyMappings;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public interface RegistryDataRewriter {
 
-    @Nullable KeyMappings getMappings(String registryKey);
+    void handle(PacketWrapper wrapper);
+
+    @Nullable
+    KeyMappings getMappings(String registryKey);
+
+    boolean shouldRemoveRegistry(String registryKey);
+
+    boolean hasRegistriesToRemove();
+
+    void updateDialog(UserConnection connection, CompoundTag tag);
 }

api/src/main/java/com/viaversion/viaversion/api/type/Types.java

@@ -103,10 +103,11 @@ import com.viaversion.viaversion.api.type.types.math.BlockPositionType1_8;
 import com.viaversion.viaversion.api.type.types.math.ChunkPositionType;
 import com.viaversion.viaversion.api.type.types.math.EulerAngleType;
 import com.viaversion.viaversion.api.type.types.math.GlobalBlockPositionType;
-import com.viaversion.viaversion.api.type.types.math.MovementVectorType;
+import com.viaversion.viaversion.api.type.types.math.LowPrecisionVectorType;
 import com.viaversion.viaversion.api.type.types.math.QuaternionType;
 import com.viaversion.viaversion.api.type.types.math.Vector3fType;
 import com.viaversion.viaversion.api.type.types.math.VectorType;
+import com.viaversion.viaversion.api.type.types.misc.CompoundTagHolderType;
 import com.viaversion.viaversion.api.type.types.misc.CompoundTagType;
 import com.viaversion.viaversion.api.type.types.misc.GameProfileType;
 import com.viaversion.viaversion.api.type.types.misc.HolderSetType;
@@ -198,13 +199,16 @@ public final class Types {
     public static final Type<Vector> VECTOR = new VectorType();
     public static final Type<Vector3f> VECTOR3F = new Vector3fType();
     public static final Type<Quaternion> QUATERNION = new QuaternionType();
-    public static final Type<Vector3d> MOVEMENT_VECTOR = new MovementVectorType();
+    public static final Type<Vector3d> LOW_PRECISION_VECTOR = new LowPrecisionVectorType();
+    @Deprecated(forRemoval = true)
+    public static final Type<Vector3d> MOVEMENT_VECTOR = LOW_PRECISION_VECTOR;
 
     public static final Type<CompoundTag> NAMED_COMPOUND_TAG = new NamedCompoundTagType();
     public static final Type<CompoundTag> OPTIONAL_NAMED_COMPOUND_TAG = new NamedCompoundTagType.OptionalNamedCompoundTagType();
     public static final Type<CompoundTag[]> NAMED_COMPOUND_TAG_ARRAY = new ArrayType<>(Types.NAMED_COMPOUND_TAG);
     public static final Type<CompoundTag> COMPOUND_TAG = new CompoundTagType();
     public static final Type<CompoundTag> OPTIONAL_COMPOUND_TAG = CompoundTagType.OptionalCompoundTagType.type();
+    public static final HolderType<CompoundTag> TRUSTED_COMPOUND_TAG_HOLDER = new CompoundTagHolderType();
 
     public static final Type<Tag> TAG = new TagType();
     public static final Type<Tag[]> TAG_ARRAY = new ArrayType<>(TAG);

api/src/main/java/com/viaversion/viaversion/api/type/types/VarIntArrayType.java

@@ -28,13 +28,21 @@ import com.viaversion.viaversion.api.type.Types;
 import io.netty.buffer.ByteBuf;
 
 public class VarIntArrayType extends Type<int[]> {
-    public VarIntArrayType() {
+
+    private final int length;
+
+    public VarIntArrayType(final int length) {
         super(int[].class);
+        this.length = length;
+    }
+
+    public VarIntArrayType() {
+        this(-1);
     }
 
     @Override
     public int[] read(ByteBuf buffer) {
-        int length = Types.VAR_INT.readPrimitive(buffer);
+        int length = this.length == -1 ? Types.VAR_INT.readPrimitive(buffer) : this.length;
         Preconditions.checkArgument(buffer.isReadable(length)); // Sanity check, at least 1 byte will be used for each varint
         int[] array = new int[length];
         for (int i = 0; i < array.length; i++) {
@@ -45,7 +53,11 @@ public class VarIntArrayType extends Type<int[]> {
 
     @Override
     public void write(ByteBuf buffer, int[] object) {
-        Types.VAR_INT.writePrimitive(buffer, object.length);
+        if (this.length != -1) {
+            Preconditions.checkArgument(length == object.length, "Length does not match expected length");
+        } else {
+            Types.VAR_INT.writePrimitive(buffer, object.length);
+        }
         for (int i : object) {
             Types.VAR_INT.writePrimitive(buffer, i);
         }

api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkSectionType1_18.java

@@ -31,8 +31,8 @@ import io.netty.buffer.ByteBuf;
 
 public class ChunkSectionType1_18 extends Type<ChunkSection> {
 
-    private final PaletteTypeBase blockPaletteType;
-    private final PaletteTypeBase biomePaletteType;
+    protected final PaletteTypeBase blockPaletteType;
+    protected final PaletteTypeBase biomePaletteType;
 
     public ChunkSectionType1_18(final int globalPaletteBlockBits, final int globalPaletteBiomeBits) {
         super(ChunkSection.class);

api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkSectionType26_1.java

@@ -0,0 +1,68 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.type.types.chunk;
+
+import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
+import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
+import com.viaversion.viaversion.api.minecraft.chunks.ChunkSectionImpl;
+import com.viaversion.viaversion.api.minecraft.chunks.PaletteType;
+import io.netty.buffer.ByteBuf;
+
+public class ChunkSectionType26_1 extends ChunkSectionType1_18 {
+
+    public ChunkSectionType26_1(final int globalPaletteBlockBits, final int globalPaletteBiomeBits) {
+        super(
+            new PaletteType1_21_5(PaletteType.BLOCKS, globalPaletteBlockBits),
+            new PaletteType1_21_5(PaletteType.BIOMES, globalPaletteBiomeBits)
+        );
+    }
+
+    @Override
+    public ChunkSection read(final ByteBuf buffer) {
+        final ChunkSection chunkSection = new ChunkSectionImpl();
+        chunkSection.setNonAirBlocksCount(buffer.readShort());
+        chunkSection.setFluidCount(buffer.readShort());
+        chunkSection.addPalette(PaletteType.BLOCKS, blockPaletteType.read(buffer));
+        chunkSection.addPalette(PaletteType.BIOMES, biomePaletteType.read(buffer));
+        return chunkSection;
+    }
+
+    @Override
+    public void write(final ByteBuf buffer, final ChunkSection section) {
+        buffer.writeShort(section.getNonAirBlocksCount());
+        buffer.writeShort(section.getFluidCount());
+        blockPaletteType.write(buffer, section.palette(PaletteType.BLOCKS));
+        biomePaletteType.write(buffer, section.palette(PaletteType.BIOMES));
+    }
+
+    @Override
+    public int serializedSize(final Chunk chunk) {
+        int length = 0;
+        for (final ChunkSection section : chunk.getSections()) {
+            length += Short.BYTES + Short.BYTES // non-air and fluid count
+                + blockPaletteType.serializedSize(section.palette(PaletteType.BLOCKS))
+                + biomePaletteType.serializedSize(section.palette(PaletteType.BIOMES));
+        }
+        return length;
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkType1_21_5.java

@@ -34,14 +34,18 @@ import io.netty.buffer.ByteBuf;
 import java.util.ArrayList;
 import java.util.List;
 
-public final class ChunkType1_21_5 extends Type<Chunk> {
+public class ChunkType1_21_5 extends Type<Chunk> {
     private final ChunkSectionType1_18 sectionType;
     private final int ySectionCount;
 
     public ChunkType1_21_5(final int ySectionCount, final int globalPaletteBlockBits, final int globalPaletteBiomeBits) {
+        this(new ChunkSectionType1_21_5(globalPaletteBlockBits, globalPaletteBiomeBits), ySectionCount);
+    }
+
+    protected ChunkType1_21_5(final ChunkSectionType1_18 sectionType, final int ySectionCount) {
         super(Chunk.class);
         Preconditions.checkArgument(ySectionCount > 0);
-        this.sectionType = new ChunkSectionType1_21_5(globalPaletteBlockBits, globalPaletteBiomeBits);
+        this.sectionType = sectionType;
         this.ySectionCount = ySectionCount;
     }
 

api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkType26_1.java

@@ -20,17 +20,11 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-package com.viaversion.viaversion.api.protocol;
+package com.viaversion.viaversion.api.type.types.chunk;
 
-/**
- * A simple protocol which does not have any packet types.
- * <p>
- * {@link AbstractProtocol} should be preferred over this class in most cases.
- */
-public abstract class AbstractSimpleProtocol extends AbstractProtocol<SimpleProtocol.DummyPacketTypes, SimpleProtocol.DummyPacketTypes,
-    SimpleProtocol.DummyPacketTypes, SimpleProtocol.DummyPacketTypes> implements SimpleProtocol {
+public final class ChunkType26_1 extends ChunkType1_21_5 {
 
-    protected AbstractSimpleProtocol() {
-        super(null, null, null, null);
+    public ChunkType26_1(final int ySectionCount, final int globalPaletteBlockBits, final int globalPaletteBiomeBits) {
+        super(new ChunkSectionType26_1(globalPaletteBlockBits, globalPaletteBiomeBits), ySectionCount);
     }
 }

api/src/main/java/com/viaversion/viaversion/api/type/types/item/ItemTemplateType26_1.java

@@ -0,0 +1,64 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.type.types.item;
+
+import com.viaversion.viaversion.api.minecraft.data.StructuredData;
+import com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;
+import com.viaversion.viaversion.api.minecraft.data.StructuredDataKey;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.minecraft.item.StructuredItemTemplate;
+import com.viaversion.viaversion.api.type.OptionalType;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.Types;
+import io.netty.buffer.ByteBuf;
+import java.util.Map;
+
+// Holds the same exact data as a regular item stack
+public class ItemTemplateType26_1 extends ItemType1_20_5 {
+
+    public ItemTemplateType26_1(final StructuredDataTypeBase dataType) {
+        super(dataType);
+    }
+
+    @Override
+    public Item read(final ByteBuf buffer) {
+        final int id = Types.VAR_INT.readPrimitive(buffer);
+        final int amount = Types.VAR_INT.readPrimitive(buffer);
+        final Map<StructuredDataKey<?>, StructuredData<?>> data = readData(buffer);
+        return new StructuredItemTemplate(id, amount, new StructuredDataContainer(data));
+    }
+
+    @Override
+    public void write(final ByteBuf buffer, final Item object) {
+        Types.VAR_INT.writePrimitive(buffer, object.identifier());
+        Types.VAR_INT.writePrimitive(buffer, object.amount());
+        writeData(buffer, object);
+    }
+
+    public static final class OptionalItemTemplateType extends OptionalType<Item> {
+
+        public OptionalItemTemplateType(final Type<Item> type) {
+            super(type);
+        }
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/type/types/item/ItemType1_20_5.java

@@ -58,7 +58,7 @@ public class ItemType1_20_5 extends Type<Item> {
         return new StructuredItem(id, amount, new StructuredDataContainer(data));
     }
 
-    private Map<StructuredDataKey<?>, StructuredData<?>> readData(final ByteBuf buffer) {
+    protected Map<StructuredDataKey<?>, StructuredData<?>> readData(final ByteBuf buffer) {
         final int valuesSize = Types.VAR_INT.readPrimitive(buffer);
         final int markersSize = Types.VAR_INT.readPrimitive(buffer);
         if (valuesSize == 0 && markersSize == 0) {
@@ -92,6 +92,10 @@ public class ItemType1_20_5 extends Type<Item> {
         Types.VAR_INT.writePrimitive(buffer, object.amount());
         Types.VAR_INT.writePrimitive(buffer, object.identifier());
 
+        writeData(buffer, object);
+    }
+
+    protected void writeData(final ByteBuf buffer, final Item object) {
         final Map<StructuredDataKey<?>, StructuredData<?>> data = object.dataContainer().data();
         int valuesSize = 0;
         int markersSize = 0;

api/src/main/java/com/viaversion/viaversion/api/type/types/math/LowPrecisionVectorType.java

@@ -29,7 +29,7 @@ import com.viaversion.viaversion.api.type.types.UnsignedIntType;
 import com.viaversion.viaversion.util.MathUtil;
 import io.netty.buffer.ByteBuf;
 
-public class MovementVectorType extends Type<Vector3d> {
+public class LowPrecisionVectorType extends Type<Vector3d> {
     // Using 15 bits, steal short constants for it
     private static final double MAX_QUANTIZED_VALUE = Short.MAX_VALUE - 1;
     private static final int SCALE_BITS = 2; // first 2 bits for the scale
@@ -38,7 +38,7 @@ public class MovementVectorType extends Type<Vector3d> {
     private static final double ABS_MAX_VALUE = (1L << Integer.SIZE + SCALE_BITS) - 1; // Unsigned int + the first two scale bits
     private static final double ABS_MIN_VALUE = 1 / MAX_QUANTIZED_VALUE;
 
-    public MovementVectorType() {
+    public LowPrecisionVectorType() {
         super(Vector3d.class);
     }
 

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/CompoundTagHolderType.java

@@ -0,0 +1,40 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.type.types.misc;
+
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.viaversion.api.type.Types;
+import io.netty.buffer.ByteBuf;
+
+public final class CompoundTagHolderType extends HolderType<CompoundTag> {
+
+    @Override
+    public CompoundTag readDirect(final ByteBuf buffer) {
+        return Types.TRUSTED_COMPOUND_TAG.read(buffer);
+    }
+
+    @Override
+    public void writeDirect(final ByteBuf buffer, final CompoundTag value) {
+        Types.TRUSTED_COMPOUND_TAG.write(buffer, value);
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/EitherHolderType.java

@@ -29,6 +29,11 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.util.Key;
 import io.netty.buffer.ByteBuf;
 
+/**
+ * Mess for certain pre 26.1 things.
+ *
+ * @param <T> held type
+ */
 public final class EitherHolderType<T> extends Type<EitherHolder<T>> {
     private final HolderType<T> holderType;
 

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/HolderSetType.java

@@ -30,6 +30,7 @@ import com.viaversion.viaversion.api.minecraft.codec.Ops;
 import com.viaversion.viaversion.api.type.OptionalType;
 import com.viaversion.viaversion.api.type.Type;
 import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.api.type.types.VarIntArrayType;
 import com.viaversion.viaversion.util.Key;
 import io.netty.buffer.ByteBuf;
 
@@ -58,12 +59,7 @@ public class HolderSetType extends Type<HolderSet> {
             final String tag = Types.STRING.read(buffer);
             return HolderSet.of(tag);
         }
-
-        final int[] values = new int[size];
-        for (int i = 0; i < size; i++) {
-            values[i] = Types.VAR_INT.readPrimitive(buffer);
-        }
-        return HolderSet.of(values);
+        return HolderSet.of(new VarIntArrayType(size).read(buffer));
     }
 
     @Override

api/src/main/java/com/viaversion/viaversion/api/type/types/misc/ParticleType.java

@@ -59,17 +59,13 @@ public class ParticleType extends DynamicType<Particle> {
         return protocol.getMappingData().getParticleMappings();
     }
 
-    public static DataReader<Particle> itemHandler(final Type<Item> itemType) {
-        return (buf, particle) -> particle.add(itemType, itemType.read(buf));
-    }
-
     public static final class Readers {
 
         public static final DataReader<Particle> BLOCK = (buf, particle) -> {
             particle.add(Types.VAR_INT, Types.VAR_INT.readPrimitive(buf)); // Flat Block
         };
-        public static final DataReader<Particle> ITEM1_13 = itemHandler(Types.ITEM1_13);
-        public static final DataReader<Particle> ITEM1_13_2 = itemHandler(Types.ITEM1_13_2);
+        public static final DataReader<Particle> ITEM1_13 = item(Types.ITEM1_13);
+        public static final DataReader<Particle> ITEM1_13_2 = item(Types.ITEM1_13_2);
         public static final DataReader<Particle> DUST = (buf, particle) -> {
             particle.add(Types.FLOAT, Types.FLOAT.readPrimitive(buf)); // Red 0-1
             particle.add(Types.FLOAT, Types.FLOAT.readPrimitive(buf)); // Green 0-1
@@ -172,4 +168,103 @@ public class ParticleType extends DynamicType<Particle> {
             return (buf, particle) -> particle.add(item, item.read(buf));
         }
     }
+
+    public static final class Fillers {
+
+        public static DynamicType<Particle>.DataFiller fill1_13_2(final Protocol<?, ?, ?, ?> protocol, final ParticleType type, final boolean useMappedNames) {
+            return type.filler(protocol, useMappedNames)
+                .reader("item", Readers.item(protocol.getItemRewriter().mappedItemType()))
+                .reader("block", Readers.BLOCK)
+                .reader("dust", Readers.DUST)
+                .reader("falling_dust", Readers.BLOCK);
+        }
+
+        public static DataFiller fill1_17(final Protocol<?, ?, ?, ?> protocol, final ParticleType type) {
+            return fill1_13_2(protocol, type, true)
+                .reader("dust_color_transition", Readers.DUST_TRANSITION)
+                .reader("vibration", Readers.VIBRATION);
+        }
+
+        public static void fill1_18(final Protocol<?, ?, ?, ?> protocol, final ParticleType type) {
+            fill1_17(protocol, type).reader("block_marker", Readers.BLOCK);
+        }
+
+        public static void fill1_19(final Protocol<?, ?, ?, ?> protocol, final ParticleType type) {
+            type.filler(protocol)
+                .reader("item", Readers.item(protocol.getItemRewriter().mappedItemType()))
+                .reader("block", Readers.BLOCK)
+                .reader("block_marker", Readers.BLOCK)
+                .reader("dust", Readers.DUST)
+                .reader("falling_dust", Readers.BLOCK)
+                .reader("dust_color_transition", Readers.DUST_TRANSITION)
+                .reader("vibration", Readers.VIBRATION1_19)
+                .reader("sculk_charge", Readers.SCULK_CHARGE)
+                .reader("shriek", Readers.SHRIEK);
+        }
+
+        public static DataFiller fill1_20_3(final Protocol<?, ?, ?, ?> protocol, final ParticleType type) {
+            return type.filler(protocol)
+                .reader("item", Readers.item(protocol.getItemRewriter().mappedItemType()))
+                .reader("block", Readers.BLOCK)
+                .reader("block_marker", Readers.BLOCK)
+                .reader("dust", Readers.DUST)
+                .reader("falling_dust", Readers.BLOCK)
+                .reader("dust_color_transition", Readers.DUST_TRANSITION)
+                .reader("vibration", Readers.VIBRATION1_20_3)
+                .reader("sculk_charge", Readers.SCULK_CHARGE)
+                .reader("shriek", Readers.SHRIEK);
+        }
+
+        public static void fill1_20_5(final Protocol<?, ?, ?, ?> protocol, final ParticleType type) {
+            fill1_20_3(protocol, type)
+                .reader("dust_pillar", Readers.BLOCK)
+                .reader("entity_effect", Readers.COLOR);
+        }
+
+        public static void fill1_21_2(final Protocol<?, ?, ?, ?> protocol) {
+            protocol.mappedTypes().particle().filler(protocol)
+                .reader("item", Readers.item(protocol.getItemRewriter().mappedItemType()))
+                .reader("block", Readers.BLOCK)
+                .reader("block_marker", Readers.BLOCK)
+                .reader("dust_pillar", Readers.BLOCK)
+                .reader("falling_dust", Readers.BLOCK)
+                .reader("block_crumble", Readers.BLOCK)
+                .reader("dust", Readers.DUST1_21_2)
+                .reader("dust_color_transition", Readers.DUST_TRANSITION1_21_2)
+                .reader("vibration", Readers.VIBRATION1_20_3)
+                .reader("sculk_charge", Readers.SCULK_CHARGE)
+                .reader("shriek", Readers.SHRIEK)
+                .reader("entity_effect", Readers.COLOR)
+                .reader("trail", Readers.TRAIL1_21_2);
+        }
+
+        public static DataFiller fill1_21_4(final Protocol<?, ?, ?, ?> protocol) {
+            return protocol.mappedTypes().particle().filler(protocol)
+                .reader("item", Readers.item(protocol.getItemRewriter().mappedItemTemplateType()))
+                .reader("block", Readers.BLOCK)
+                .reader("block_marker", Readers.BLOCK)
+                .reader("dust_pillar", Readers.BLOCK)
+                .reader("falling_dust", Readers.BLOCK)
+                .reader("block_crumble", Readers.BLOCK)
+                .reader("dust", Readers.DUST1_21_2)
+                .reader("dust_color_transition", Readers.DUST_TRANSITION1_21_2)
+                .reader("vibration", Readers.VIBRATION1_20_3)
+                .reader("sculk_charge", Readers.SCULK_CHARGE)
+                .reader("shriek", Readers.SHRIEK)
+                .reader("entity_effect", Readers.COLOR)
+                .reader("trail", Readers.TRAIL1_21_4);
+        }
+
+        public static DataFiller fill1_21_5(final Protocol<?, ?, ?, ?> protocol) {
+            return fill1_21_4(protocol).reader("tinted_leaves", Readers.COLOR);
+        }
+
+        public static void fill1_21_9(final Protocol<?, ?, ?, ?> protocol) {
+            fill1_21_5(protocol)
+                .reader("dragon_breath", Readers.POWER)
+                .reader("effect", Readers.SPELL)
+                .reader("instant_effect", Readers.SPELL)
+                .reader("flash", Readers.COLOR);
+        }
+    }
 }

api/src/main/java/com/viaversion/viaversion/api/type/types/version/Types1_20_5.java

@@ -50,7 +50,7 @@ public class Types1_20_5<K extends VersionedStructuredDataKeys, E extends Abstra
     public final Type<Item[]> itemArray = new ArrayType<>(item);
     public final Type<Item> itemCost = new ItemCostType1_20_5(structuredDataArray);
     public final Type<Item> optionalItemCost = new ItemCostType1_20_5.OptionalItemCostType(itemCost);
-    public final K structuredDataKeys;
+    private K structuredDataKeys;
 
     public final ParticleType particle = new ParticleType();
     public final ArrayType<Particle> particles = new ArrayType<>(particle);
@@ -58,11 +58,17 @@ public class Types1_20_5<K extends VersionedStructuredDataKeys, E extends Abstra
     public final Type<EntityData> entityData;
     public final Type<List<EntityData>> entityDataList;
 
-    public Types1_20_5(final Function<Types1_20_5<?, ?>, K> keysSupplier, final Function<Types1_20_5<?, ?>, E> entityDataTypesSupplier) {
-        this.structuredDataKeys = keysSupplier.apply(this);
+    public Types1_20_5(final Function<VersionedTypesHolder, K> keysSupplier, final Function<VersionedTypesHolder, E> entityDataTypesSupplier) {
         this.entityDataTypes = entityDataTypesSupplier.apply(this);
         this.entityData = new EntityDataType(entityDataTypes);
         this.entityDataList = new EntityDataListType(entityData);
+        if (keysSupplier != null) {
+            initKeys(keysSupplier);
+        }
+    }
+
+    protected void initKeys(final Function<VersionedTypesHolder, K> keysSupplier) {
+        this.structuredDataKeys = keysSupplier.apply(this);
     }
 
     @Override
@@ -75,6 +81,21 @@ public class Types1_20_5<K extends VersionedStructuredDataKeys, E extends Abstra
         return itemArray;
     }
 
+    @Override
+    public Type<Item> itemTemplate() {
+        return item;
+    }
+
+    @Override
+    public Type<Item> optionalItemTemplate() {
+        return item;
+    }
+
+    @Override
+    public Type<Item[]> itemTemplateArray() {
+        return itemArray;
+    }
+
     @Override
     public Type<Item> itemCost() {
         return itemCost;

api/src/main/java/com/viaversion/viaversion/api/type/types/version/Types1_21.java

@@ -34,7 +34,7 @@ public final class Types1_21 extends Types1_20_5<StructuredDataKeys1_20_5, Entit
 
     public final Type<Item> optionalItem; // Optional as in boolean prefixed, not via the amount
 
-    public Types1_21(final Function<Types1_20_5<?, ?>, StructuredDataKeys1_20_5> keysSupplier, final Function<Types1_20_5<?, ?>, EntityDataTypes1_21> entityDataTypesSupplier) {
+    public Types1_21(final Function<VersionedTypesHolder, StructuredDataKeys1_20_5> keysSupplier, final Function<VersionedTypesHolder, EntityDataTypes1_21> entityDataTypesSupplier) {
         super(keysSupplier, entityDataTypesSupplier);
         this.optionalItem = ((ItemType1_20_5) item).new OptionalItemType();
     }

api/src/main/java/com/viaversion/viaversion/api/type/types/version/Types26_1.java

@@ -0,0 +1,58 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package com.viaversion.viaversion.api.type.types.version;
+
+import com.viaversion.viaversion.api.minecraft.data.version.VersionedStructuredDataKeys;
+import com.viaversion.viaversion.api.minecraft.entitydata.types.AbstractEntityDataTypes;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.api.type.Type;
+import com.viaversion.viaversion.api.type.types.ArrayType;
+import com.viaversion.viaversion.api.type.types.item.ItemTemplateType26_1;
+import java.util.function.Function;
+
+public class Types26_1<K extends VersionedStructuredDataKeys, E extends AbstractEntityDataTypes> extends Types1_20_5<K, E> {
+
+    public final Type<Item> itemTemplate = new ItemTemplateType26_1(structuredData);
+    public final Type<Item> optionalItemTemplate = new ItemTemplateType26_1.OptionalItemTemplateType(itemTemplate);
+    public final Type<Item[]> itemTemplateArray = new ArrayType<>(itemTemplate);
+
+    public Types26_1(final Function<VersionedTypesHolder, K> keysSupplier, final Function<VersionedTypesHolder, E> entityDataTypesSupplier) {
+        super(null, entityDataTypesSupplier);
+        initKeys(keysSupplier);
+    }
+
+    @Override
+    public Type<Item> itemTemplate() {
+        return itemTemplate;
+    }
+
+    @Override
+    public Type<Item> optionalItemTemplate() {
+        return optionalItemTemplate;
+    }
+
+    @Override
+    public Type<Item[]> itemTemplateArray() {
+        return itemTemplateArray;
+    }
+}

api/src/main/java/com/viaversion/viaversion/api/type/types/version/VersionedTypes.java

@@ -32,6 +32,7 @@ import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1
 import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_21_2;
 import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_21_5;
 import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_21_9;
+import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes26_1;
 
 /**
  * Holds versioned accessors for highly volatile types, specifically around items and data components.
@@ -49,4 +50,5 @@ public final class VersionedTypes {
     public static final Types1_20_5<StructuredDataKeys1_21_5, EntityDataTypes1_21_5> V1_21_6 = new Types1_20_5<>(StructuredDataKeys1_21_5::new, EntityDataTypes1_21_5::new);
     public static final Types1_20_5<StructuredDataKeys1_21_5, EntityDataTypes1_21_9> V1_21_9 = new Types1_20_5<>(StructuredDataKeys1_21_5::new, EntityDataTypes1_21_9::new);
     public static final Types1_20_5<StructuredDataKeys1_21_11, EntityDataTypes1_21_11> V1_21_11 = new Types1_20_5<>(StructuredDataKeys1_21_11::new, EntityDataTypes1_21_11::new);
+    public static final Types26_1<StructuredDataKeys1_21_11, EntityDataTypes26_1> V26_1 = new Types26_1<>(StructuredDataKeys1_21_11::new, EntityDataTypes26_1::new);
 }

api/src/main/java/com/viaversion/viaversion/api/type/types/version/VersionedTypesHolder.java

@@ -39,10 +39,31 @@ import java.util.List;
  */
 public interface VersionedTypesHolder {
 
+    /**
+     * Returns the unmapped item stack type
+     *
+     * @return unmapped item stack type
+     */
     Type<Item> item();
 
     Type<Item[]> itemArray();
 
+    /**
+     * Returns the unmapped item stack template type, used for certain recipes/templates in 26.1+.
+     *
+     * @return unmapped item stack template type
+     */
+    Type<Item> itemTemplate();
+
+    Type<Item> optionalItemTemplate();
+
+    Type<Item[]> itemTemplateArray();
+
+    /**
+     * Returns the unmapped item cost type, used in merchant offers.
+     *
+     * @return unmapped item cost type
+     */
     Type<Item> itemCost();
 
     Type<Item> optionalItemCost();

api/src/main/java/com/viaversion/viaversion/exception/InformativeException.java

@@ -60,7 +60,7 @@ public class InformativeException extends RuntimeException {
 
     @Override
     public String getMessage() {
-        final StringBuilder builder = new StringBuilder("Please report this on the Via support Discord or open an issue on the relevant GitHub repository\n");
+        final StringBuilder builder = new StringBuilder("Please report the full error (!) from the console on the Via support Discord or open an issue on the relevant GitHub repository.\n");
         boolean first = true;
         for (final DataEntry entry : dataEntries) {
             if (!first) {

build-logic/build.gradle.kts

@@ -8,7 +8,7 @@ repositories {
 
 dependencies {
     // version must be manually kept in sync with the one in root project settings.gradle.kts
-    implementation("com.gradleup.shadow:shadow-gradle-plugin:9.3.1")
+    implementation("com.gradleup.shadow:shadow-gradle-plugin:9.4.1")
 
     // A nice no-conflict comment for patching in downgrading
 }

bukkit-legacy/src/main/java/com/viaversion/viaversion/bukkit/util/NMSUtil.java

@@ -49,6 +49,20 @@ public final class NMSUtil {
         }
     }
 
+    public static Class<?> nms(String className, String... fallbackFullClassNames) throws ClassNotFoundException {
+        try {
+            return Class.forName(NMS + "." + className);
+        } catch (ClassNotFoundException ignored) {
+        }
+        for (final String fallbackFullClassName : fallbackFullClassNames) {
+            try {
+                return Class.forName(fallbackFullClassName);
+            } catch (ClassNotFoundException ignored) {
+            }
+        }
+        throw new ClassNotFoundException(className);
+    }
+
     public static Class<?> obc(String className) throws ClassNotFoundException {
         return Class.forName(BASE + "." + className);
     }

bukkit/src/main/java/com/viaversion/viaversion/bukkit/platform/BukkitViaInjector.java

@@ -105,7 +105,8 @@ public class BukkitViaInjector extends LegacyViaInjector {
         // Grab the ping class and find the field to access it
         Class<?> pingClazz = NMSUtil.nms(
             "ServerPing",
-            "net.minecraft.network.protocol.status.ServerPing"
+            "net.minecraft.network.protocol.status.ServerPing",
+            "net.minecraft.network.protocol.status.ServerStatus"
         );
         Object ping = null;
         for (Field field : serverClazz.getDeclaredFields()) {
@@ -120,7 +121,8 @@ public class BukkitViaInjector extends LegacyViaInjector {
         // Now get the ServerData inside ServerPing
         Class<?> serverDataClass = NMSUtil.nms(
             "ServerPing$ServerData",
-            "net.minecraft.network.protocol.status.ServerPing$ServerData"
+            "net.minecraft.network.protocol.status.ServerPing$ServerData",
+            "net.minecraft.network.protocol.status.ServerStatus$Version"
         );
         Object serverData = null;
         for (Field field : pingClazz.getDeclaredFields()) {
@@ -155,7 +157,8 @@ public class BukkitViaInjector extends LegacyViaInjector {
         );
         Class<?> connectionClass = NMSUtil.nms(
             "ServerConnection",
-            "net.minecraft.server.network.ServerConnection"
+            "net.minecraft.server.network.ServerConnection",
+            "net.minecraft.server.network.ServerConnectionListener"
         );
 
         Object server = ReflectionUtil.invokeStatic(serverClass, "getServer");

common/src/main/java/com/viaversion/viaversion/api/protocol/AbstractProtocol.java

@@ -2,23 +2,18 @@
  * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
  * Copyright (C) 2016-2026 ViaVersion and contributors
  *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 package com.viaversion.viaversion.api.protocol;
 
@@ -39,10 +34,15 @@ import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypeMap;
 import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypesProvider;
 import com.viaversion.viaversion.api.protocol.packet.provider.SimplePacketTypesProvider;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
 import com.viaversion.viaversion.api.rewriter.MappingDataListener;
 import com.viaversion.viaversion.api.rewriter.Rewriter;
 import com.viaversion.viaversion.exception.CancelException;
 import com.viaversion.viaversion.exception.InformativeException;
+import com.viaversion.viaversion.protocol.shared_registration.SharedRegistrations;
+import com.viaversion.viaversion.rewriter.RecipeDisplayRewriter;
+import com.viaversion.viaversion.rewriter.TagRewriter;
+import com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;
 import com.viaversion.viaversion.util.ProtocolLogger;
 import com.viaversion.viaversion.util.ProtocolUtil;
 import java.util.HashMap;
@@ -74,6 +74,8 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
     private final Map<Class<?>, Object> storedObjects = new HashMap<>();
     private boolean initialized;
     private ProtocolLogger logger;
+    private ProtocolVersion serverVersion;
+    private ProtocolVersion clientVersion;
 
     @Deprecated
     protected AbstractProtocol() {
@@ -104,6 +106,11 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         if (logger == null) {
             logger = createLogger();
         }
+
+        // Apply shared registrations based on protocol version range
+        // Run before registerPackets, so implementations have to call append intentionally
+        applySharedRegistrations();
+
         registerPackets();
         registerConfigurationChangeHandlers();
 
@@ -128,6 +135,13 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         }
     }
 
+    /**
+     * Applies shared registrations. Can be overridden to remove or add registrations.
+     */
+    protected void applySharedRegistrations() {
+        SharedRegistrations.defaultRegistrations().applyMatching(this);
+    }
+
     protected ProtocolLogger createLogger() {
         return new ProtocolLogger(getClass());
     }
@@ -177,6 +191,20 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         }
     }
 
+    @Override
+    public void replaceClientbound(final CU type, @Nullable final PacketHandler handler) {
+        final PacketMapping mapping = clientboundMappings.mappedPacket(type.state(), type.getId());
+        Preconditions.checkNotNull(mapping, "Packet %s has no handler to replace", type);
+        mapping.setHandler(handler);
+    }
+
+    @Override
+    public void replaceServerbound(final SU type, @Nullable final PacketHandler handler) {
+        final PacketMapping mapping = serverboundMappings.mappedPacket(type.state(), type.getId());
+        Preconditions.checkNotNull(mapping, "Packet %s has no handler to replace", type);
+        mapping.setHandler(handler);
+    }
+
     private <U extends PacketType, M extends PacketType> void registerPacketIdChanges(
         Map<State, PacketTypeMap<U>> unmappedPacketTypes,
         Map<State, PacketTypeMap<M>> mappedPacketTypes,
@@ -214,6 +242,7 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
     @Override
     public final void loadMappingData() {
         getMappingData().load();
+        initialize();
         onMappingDataLoaded();
     }
 
@@ -289,6 +318,46 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         return packetTypesProvider.unmappedClientboundType(State.CONFIGURATION, "FINISH_CONFIGURATION");
     }
 
+    /**
+     * Returns the server protocol version for this protocol,
+     * or null if not set (e.g. for base protocols).
+     *
+     * @return the server protocol version
+     */
+    public @Nullable ProtocolVersion getServerVersion() {
+        return serverVersion;
+    }
+
+    /**
+     * Sets the server protocol version for this protocol.
+     * Called by the protocol manager before {@link #initialize()}.
+     *
+     * @param serverVersion the server protocol version
+     */
+    public void setServerVersion(final ProtocolVersion serverVersion) {
+        this.serverVersion = serverVersion;
+    }
+
+    /**
+     * Returns the client protocol version for this protocol,
+     * or null if not set (e.g. for base protocols).
+     *
+     * @return the client protocol version for this protocol
+     */
+    public @Nullable ProtocolVersion getClientVersion() {
+        return clientVersion;
+    }
+
+    /**
+     * Sets the client protocol version for this protocol.
+     * Called by the protocol manager before {@link #initialize()}.
+     *
+     * @param clientVersion the client protocol version for this protocol
+     */
+    public void setClientVersion(final ProtocolVersion clientVersion) {
+        this.clientVersion = clientVersion;
+    }
+
     // ---------------------------------------------------------------------------------
 
     @Override
@@ -297,7 +366,7 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         PacketMapping packetMapping = PacketMapping.of(mappedPacketId, handler);
         if (!override && serverboundMappings.hasMapping(state, unmappedPacketId)) {
             Via.getPlatform().getLogger().log(Level.WARNING, unmappedPacketId + " already registered!" +
-                " If this override is intentional, set override to true. Stacktrace: ", new Exception());
+                " If this override is intentional, use replaceServerbound instead. Stacktrace: ", new Exception());
         }
         serverboundMappings.addMapping(state, unmappedPacketId, packetMapping);
     }
@@ -313,7 +382,7 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         PacketMapping packetMapping = PacketMapping.of(mappedPacketId, handler);
         if (!override && clientboundMappings.hasMapping(state, unmappedPacketId)) {
             Via.getPlatform().getLogger().log(Level.WARNING, unmappedPacketId + " already registered!" +
-                " If override is intentional, set override to true. Stacktrace: ", new Exception());
+                " If override is intentional, use replaceClientbound instead. Stacktrace: ", new Exception());
         }
         clientboundMappings.addMapping(state, unmappedPacketId, packetMapping);
     }
@@ -373,8 +442,8 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
 
         PacketMapping packetMapping = PacketMapping.of(mappedPacketType, handler);
         if (!override && packetMappings.hasMapping(packetType)) {
-            getLogger().log(Level.WARNING, packetType + " already registered!" +
-                " If override is intentional, set override to true. Stacktrace: ", new Exception());
+            throw new IllegalArgumentException("Packet type " + packetType + " already registered! If override is intentional, use "
+                + (packetType.direction() == Direction.SERVERBOUND ? "replaceServerbound" : "replaceClientbound") + " instead.");
         }
         packetMappings.addMapping(packetType, packetMapping);
     }
@@ -443,6 +512,39 @@ public abstract class AbstractProtocol<CU extends ClientboundPacketType, CM exte
         return logger;
     }
 
+    @Override
+    public @Nullable TagRewriter<CU> getTagRewriter() {
+        return null;
+    }
+
+    @Override
+    public @Nullable ComponentRewriterBase<CU> getComponentRewriter() {
+        return null;
+    }
+
+    @Override
+    public com.viaversion.viaversion.rewriter.@Nullable ParticleRewriter<CU> getParticleRewriter() {
+        return null;
+    }
+
+    @Override
+    public com.viaversion.viaversion.rewriter.@Nullable EntityRewriter<CU, ?> getEntityRewriter() {
+        return null;
+    }
+
+    @Override
+    public com.viaversion.viaversion.rewriter.@Nullable ItemRewriter<CU, SU, ?> getItemRewriter() {
+        return null;
+    }
+
+    public com.viaversion.viaversion.rewriter.@Nullable BlockRewriter<CU> getBlockRewriter() {
+        return null;
+    }
+
+    public @Nullable RecipeDisplayRewriter<CU> getRecipeRewriter() {
+        return null;
+    }
+
     private void printRemapError(Direction direction, State state, int unmappedPacketId, int mappedPacketId, InformativeException e) {
         // Don't print errors during handshake/login/status
         if (state != State.PLAY && direction == Direction.SERVERBOUND && !Via.getManager().debugHandler().enabled()) {

common/src/main/java/com/viaversion/viaversion/codec/CodecRegistryContext.java

@@ -30,7 +30,7 @@ public record CodecRegistryContext(Protocol<?, ?, ?, ?> protocol, RegistryAccess
 
     // Generally from hardcoded, but highly variable client data
     private static final Set<StructuredDataKey<?>> NOT_IMPLEMENTED = new ReferenceOpenHashSet<>(List.of(
-        StructuredDataKey.DAMAGE_TYPE
+        StructuredDataKey.DAMAGE_TYPE1_21_11
     ));
 
     public CodecRegistryContext(final Protocol<?, ?, ?, ?> protocol, final RegistryAccess registryAccess, final boolean mapped) {

common/src/main/java/com/viaversion/viaversion/commands/defaultsubs/DebugSubCmd.java

@@ -37,6 +37,11 @@ public class DebugSubCmd implements ViaSubCommand {
         return "Toggle various debug modes.";
     }
 
+    @Override
+    public String usage() {
+        return "debug [clear|pre|post], or debug <add|remove> <packet>";
+    }
+
     @Override
     public boolean execute(ViaCommandSender sender, String[] args) {
         final DebugHandler debug = Via.getManager().debugHandler();
@@ -49,11 +54,11 @@ public class DebugSubCmd implements ViaSubCommand {
                 debug.clearPacketTypesToLog();
                 sendMessage(sender, "&6Cleared packet types to log");
                 return true;
-            } else if (args[0].equalsIgnoreCase("logpretransform")) {
+            } else if (args[0].equalsIgnoreCase("pre")) {
                 debug.setLogPrePacketTransform(!debug.logPrePacketTransform());
                 sendMessage(sender, "&6Pre transform packet logging is now %s", (debug.logPrePacketTransform() ? "&aenabled" : "&cdisabled"));
                 return true;
-            } else if (args[0].equalsIgnoreCase("logposttransform")) {
+            } else if (args[0].equalsIgnoreCase("post")) {
                 debug.setLogPostPacketTransform(!debug.logPostPacketTransform());
                 sendMessage(sender, "&6Post transform packet logging is now %s", (debug.logPostPacketTransform() ? "&aenabled" : "&cdisabled"));
                 return true;
@@ -75,7 +80,7 @@ public class DebugSubCmd implements ViaSubCommand {
     @Override
     public List<String> onTabComplete(final ViaCommandSender sender, final String[] args) {
         if (args.length == 1) {
-            return Arrays.asList("clear", "logposttransform", "add", "remove");
+            return Arrays.asList("clear", "pre", "post", "add", "remove");
         }
         return Collections.emptyList();
     }

common/src/main/java/com/viaversion/viaversion/commands/defaultsubs/DisplayLeaksSubCmd.java

@@ -37,7 +37,7 @@ public class DisplayLeaksSubCmd implements ViaSubCommand {
 
     @Override
     public String usage() {
-        return "displayleaks <level>";
+        return "displayleaks [level]";
     }
 
     @Override

common/src/main/java/com/viaversion/viaversion/connection/ConnectionDetails.java

@@ -78,6 +78,7 @@ public final class ConnectionDetails {
         payload.addProperty("version", clientVersion.getOriginalVersion());
         payload.addProperty("versionName", clientVersion.getName());
         payload.addProperty("versionType", clientVersion.getVersionType().name());
+        Via.getPlatform().modifyPlayerDetails(connection, payload);
 
         Via.getPlatform().sendCustomPayload(connection, channel, payload.toString().getBytes(StandardCharsets.UTF_8));
     }
@@ -102,6 +103,7 @@ public final class ConnectionDetails {
         payload.addProperty("version", serverVersion.getOriginalVersion());
         payload.addProperty("versionName", serverVersion.getName());
         payload.addProperty("versionType", serverVersion.getVersionType().name());
+        Via.getPlatform().modifyServerDetails(connection, payload);
 
         Via.getPlatform().sendCustomPayloadToClient(connection, channel, payload.toString().getBytes(StandardCharsets.UTF_8));
     }

common/src/main/java/com/viaversion/viaversion/data/entity/EntityTrackerBase.java

@@ -215,7 +215,7 @@ public class EntityTrackerBase implements EntityTracker, ClientEntityIdChangeLis
 
     @Override
     public @Nullable DimensionData dimensionData(int dimensionId) {
-        return dimensions.values().stream().filter(data -> data.id() == dimensionId).findFirst().orElse(null); // TODO Store as array as well
+        return dimensions.values().stream().filter(data -> data.id() == dimensionId).findFirst().orElse(null);
     }
 
     @Override

common/src/main/java/com/viaversion/viaversion/data/item/ItemHasherBase.java

@@ -116,6 +116,8 @@ public class ItemHasherBase implements ItemHasher {
                 entry.setValue(clientProvidedHash);
             }
         }
+
+        originalItem.setAmount(clientItem.amount());
         return originalItem;
     }
 

common/src/main/java/com/viaversion/viaversion/protocol/AbstractSimpleProtocol.java

@@ -0,0 +1,34 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol;
+
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.api.protocol.SimpleProtocol;
+
+/**
+ * A simple protocol which does not have any packet types.
+ * <p>
+ * {@link AbstractProtocol} should be preferred over this class in most cases.
+ */
+public abstract class AbstractSimpleProtocol extends AbstractProtocol<SimpleProtocol.DummyPacketTypes, SimpleProtocol.DummyPacketTypes,
+    SimpleProtocol.DummyPacketTypes, SimpleProtocol.DummyPacketTypes> implements SimpleProtocol {
+
+    protected AbstractSimpleProtocol() {
+        super(null, null, null, null);
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/ProtocolManagerImpl.java

@@ -23,6 +23,7 @@ import com.google.common.collect.Range;
 import com.viaversion.viaversion.api.Via;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.data.MappingDataLoader;
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
 import com.viaversion.viaversion.api.protocol.Protocol;
 import com.viaversion.viaversion.api.protocol.ProtocolManager;
 import com.viaversion.viaversion.api.protocol.ProtocolPathEntry;
@@ -38,6 +39,7 @@ import com.viaversion.viaversion.api.protocol.version.ServerProtocolVersion;
 import com.viaversion.viaversion.api.protocol.version.VersionType;
 import com.viaversion.viaversion.protocol.packet.PacketWrapperImpl;
 import com.viaversion.viaversion.protocol.packet.VersionedPacketTransformerImpl;
+import com.viaversion.viaversion.protocol.shared_registration.def.DefaultRegistrations;
 import com.viaversion.viaversion.protocols.base.InitialBaseProtocol;
 import com.viaversion.viaversion.protocols.base.v1_16.ClientboundBaseProtocol1_16;
 import com.viaversion.viaversion.protocols.base.v1_7.ClientboundBaseProtocol1_7;
@@ -76,6 +78,7 @@ import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.Protocol1_20_2To1_20_
 import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.Protocol1_20_3To1_20_5;
 import com.viaversion.viaversion.protocols.v1_20_5to1_21.Protocol1_20_5To1_21;
 import com.viaversion.viaversion.protocols.v1_20to1_20_2.Protocol1_20To1_20_2;
+import com.viaversion.viaversion.protocols.v1_21_11to26_1.Protocol1_21_11To26_1;
 import com.viaversion.viaversion.protocols.v1_21_2to1_21_4.Protocol1_21_2To1_21_4;
 import com.viaversion.viaversion.protocols.v1_21_4to1_21_5.Protocol1_21_4To1_21_5;
 import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.Protocol1_21_5To1_21_6;
@@ -94,6 +97,7 @@ import it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap;
 import it.unimi.dsi.fastutil.objects.Object2ObjectMap;
 import it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap;
 import it.unimi.dsi.fastutil.objects.Object2ObjectSortedMap;
+import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -112,9 +116,7 @@ import java.util.concurrent.ForkJoinWorkerThread;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
-import java.util.function.Function;
 import java.util.logging.Level;
-import it.unimi.dsi.fastutil.objects.Reference2ObjectOpenHashMap;
 import org.checkerframework.checker.nullness.qual.Nullable;
 
 public class ProtocolManagerImpl implements ProtocolManager {
@@ -145,6 +147,8 @@ public class ProtocolManagerImpl implements ProtocolManager {
             worker.setName("Via-Mappingloader-" + threadIndex.incrementAndGet());
             return worker;
         }, ForkJoinWorkerThread.getDefaultUncaughtExceptionHandler(), true);
+
+        DefaultRegistrations.apply();
     }
 
     public void registerProtocols() {
@@ -213,6 +217,8 @@ public class ProtocolManagerImpl implements ProtocolManager {
         registerProtocol(new Protocol1_21_6To1_21_7(), ProtocolVersion.v1_21_7, ProtocolVersion.v1_21_6);
         registerProtocol(new Protocol1_21_7To1_21_9(), ProtocolVersion.v1_21_9, ProtocolVersion.v1_21_7);
         registerProtocol(new Protocol1_21_9To1_21_11(), ProtocolVersion.v1_21_11, ProtocolVersion.v1_21_9);
+
+        registerProtocol(new Protocol1_21_11To26_1(), ProtocolVersion.v26_1, ProtocolVersion.v1_21_11);
     }
 
     @Override
@@ -222,8 +228,11 @@ public class ProtocolManagerImpl implements ProtocolManager {
 
     @Override
     public void registerProtocol(Protocol protocol, List<ProtocolVersion> supportedClientVersion, ProtocolVersion serverVersion) {
-        // Register the protocol's handlers
-        protocol.initialize();
+        // Set the server version on AbstractProtocol instances before initialization
+        if (protocol instanceof AbstractProtocol<?, ?, ?, ?> abstractProtocol) {
+            abstractProtocol.setServerVersion(serverVersion);
+            abstractProtocol.setClientVersion(supportedClientVersion.stream().max(ProtocolVersion::compareTo).orElseThrow());
+        }
 
         // Clear cache as this may make new routes.
         if (!pathCache.isEmpty()) {
@@ -245,14 +254,22 @@ public class ProtocolManagerImpl implements ProtocolManager {
             refreshVersions();
         }
 
-        if (protocol.hasMappingDataToLoad()) {
-            if (mappingLoaderExecutor != null) {
-                // Submit mapping data loading
-                addMappingLoaderFuture(protocol.getClass(), protocol::loadMappingData);
+        // Load mapping data and register the protocol's handlers
+        if (!protocol.hasMappingDataToLoad()) {
+            protocol.initialize();
+            return;
+        }
+
+        // Submit mapping data loading
+        if (mappingLoaderExecutor != null) {
+            if (protocol.dependsOn() != null) {
+                addMappingLoaderFuture(protocol.getClass(), protocol.dependsOn(), protocol::loadMappingData);
             } else {
-                // Late protocol adding - just do it on the current thread
-                protocol.loadMappingData();
+                addMappingLoaderFuture(protocol.getClass(), protocol::loadMappingData);
             }
+        } else {
+            // Late protocol adding - just do it on the current thread
+            protocol.loadMappingData();
         }
     }
 
@@ -481,7 +498,7 @@ public class ProtocolManagerImpl implements ProtocolManager {
     }
 
     @Override
-    public boolean checkForMappingCompletion() {
+    public boolean checkForMappingCompletion(final boolean propagateErrors) {
         mappingLoaderLock.readLock().lock();
         try {
             if (mappingsLoaded) {
@@ -493,6 +510,9 @@ public class ProtocolManagerImpl implements ProtocolManager {
                 if (!future.isDone()) {
                     return false;
                 }
+                if (propagateErrors) {
+                    future.join();
+                }
             }
 
             shutdownLoaderExecutor();
@@ -504,7 +524,8 @@ public class ProtocolManagerImpl implements ProtocolManager {
 
     @Override
     public void addMappingLoaderFuture(Class<? extends Protocol> protocolClass, Runnable runnable) {
-        CompletableFuture<Void> future = CompletableFuture.runAsync(runnable, mappingLoaderExecutor).exceptionally(mappingLoaderThrowable(protocolClass));
+        CompletableFuture<Void> future = CompletableFuture.runAsync(runnable, mappingLoaderExecutor)
+            .whenComplete(($, t) -> logIfErrored(protocolClass, t));
 
         mappingLoaderLock.writeLock().lock();
         try {
@@ -516,8 +537,8 @@ public class ProtocolManagerImpl implements ProtocolManager {
 
     @Override
     public void addMappingLoaderFuture(Class<? extends Protocol> protocolClass, Class<? extends Protocol> dependsOn, Runnable runnable) {
-        CompletableFuture<Void> future = getMappingLoaderFuture(dependsOn)
-            .whenCompleteAsync((v, throwable) -> runnable.run(), mappingLoaderExecutor).exceptionally(mappingLoaderThrowable(protocolClass));
+        CompletableFuture<Void> future = getMappingLoaderFuture(dependsOn).thenRunAsync(runnable, mappingLoaderExecutor)
+            .whenComplete(($, t) -> logIfErrored(protocolClass, t));
 
         mappingLoaderLock.writeLock().lock();
         try {
@@ -568,10 +589,9 @@ public class ProtocolManagerImpl implements ProtocolManager {
         MappingDataLoader.INSTANCE.clearCache();
     }
 
-    private Function<Throwable, Void> mappingLoaderThrowable(Class<? extends Protocol> protocolClass) {
-        return throwable -> {
-            Via.getPlatform().getLogger().log(Level.SEVERE, "Error during mapping loading of " + protocolClass.getSimpleName(), throwable);
-            return null;
-        };
+    private void logIfErrored(final Class<? extends Protocol> protocolClass, @Nullable final Throwable throwable) {
+        if (throwable != null) {
+            Via.getPlatform().getLogger().log(Level.SEVERE, "Error during loading of " + protocolClass.getSimpleName(), throwable);
+        }
     }
 }

common/src/main/java/com/viaversion/viaversion/protocol/packet/PacketWrapperImpl.java

@@ -478,6 +478,19 @@ public class PacketWrapperImpl implements PacketWrapper {
         this.packetValues.clear();
     }
 
+    @Override
+    public void rewindReader(final int values) {
+        if (allActionsRead) {
+            return;
+        }
+
+        final int size = packetValues.size();
+        Preconditions.checkArgument(values <= size, "Tried resetting more values than there are readable values");
+        for (int i = size - 1; i >= size - values; i--) {
+            this.readableObjects.addFirst(this.packetValues.remove(i));
+        }
+    }
+
     @Override
     public void sendToServerRaw() throws InformativeException {
         sendToServerRaw(true);
@@ -584,6 +597,17 @@ public class PacketWrapperImpl implements PacketWrapper {
         this.allActionsRead = allActionsRead;
     }
 
+    @Override
+    public void consumeReadsOnly(final Runnable runnable) {
+        final boolean previous = this.allActionsRead;
+        this.allActionsRead = true;
+        try {
+            runnable.run();
+        } finally {
+            this.allActionsRead = previous;
+        }
+    }
+
     @Override
     public String toString() {
         return "PacketWrapper{" +

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/PacketBound.java

@@ -0,0 +1,23 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration;
+
+public enum PacketBound {
+    ADDED_AT_MIN,
+    REMOVED_AT_MAX
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/RegistrationBuilder.java

@@ -0,0 +1,151 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration;
+
+import com.google.common.base.Preconditions;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import com.viaversion.viaversion.api.protocol.version.VersionType;
+import com.viaversion.viaversion.protocol.shared_registration.SharedRegistrations.RegistrationAction;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+public final class RegistrationBuilder {
+    private final List<VersionedTemplateGroup> groups = new ArrayList<>();
+    private final SharedRegistrations registrations;
+    private VersionType versionType;
+
+    RegistrationBuilder(final SharedRegistrations registrations) {
+        this.registrations = registrations;
+    }
+
+    /**
+     * Adds a registration for an open-ended version range.
+     *
+     * @param min    minimum version, inclusive
+     * @param action registration action
+     * @return this
+     */
+    public RegistrationBuilder since(final ProtocolVersion min, final RegistrationAction<?, ?> action) {
+        checkVersionType(min);
+        groups.add(new VersionedTemplateGroup(action, min, null));
+        return this;
+    }
+
+    /**
+     * Adds a registration for a version range.
+     *
+     * @param min    minimum version, inclusive
+     * @param max    maximum version, exclusive
+     * @param action registration action
+     * @return this
+     */
+    public RegistrationBuilder range(final ProtocolVersion min, final ProtocolVersion max, final RegistrationAction<?, ?> action) {
+        checkVersionType(min);
+        checkVersionType(max);
+        groups.add(new VersionedTemplateGroup(action, min, max));
+        return this;
+    }
+
+    public <CU extends ClientboundPacketType, SU extends ServerboundPacketType> RegistrationBuilder ranges(
+        final ProtocolVersion min, final Consumer<RangesBuilder<CU, SU>> consumer
+    ) {
+        consumer.accept(new RangesBuilder<>(min));
+        return this;
+    }
+
+    public <CU extends ClientboundPacketType, SU extends ServerboundPacketType, R> RegistrationBuilder ranges(
+        final Function<RegistrationContext<CU, SU>, R> adapter, final ProtocolVersion min,
+        final Consumer<TypedRangesBuilder<CU, SU, R>> consumer
+    ) {
+        consumer.accept(new TypedRangesBuilder<>(adapter, min));
+        return this;
+    }
+
+    public void register() {
+        registrations.register(versionType, groups);
+    }
+
+    private void checkVersionType(final ProtocolVersion version) {
+        if (versionType == null) {
+            versionType = version.getVersionType();
+        } else if (versionType != version.getVersionType()) {
+            throw new IllegalArgumentException("Cannot mix different version types in the same registration builder");
+        }
+    }
+
+    public class RangesBuilder<CU extends ClientboundPacketType, SU extends ServerboundPacketType> {
+        private ProtocolVersion currentMin;
+        private boolean completed;
+
+        private RangesBuilder(final ProtocolVersion min) {
+            this.currentMin = min;
+        }
+
+        public RangesBuilder<CU, SU> to(final ProtocolVersion max, final RegistrationAction<CU, SU> action) {
+            Preconditions.checkState(!completed, "Range chain already completed");
+            RegistrationBuilder.this.range(currentMin, max, action);
+            currentMin = max;
+            return this;
+        }
+
+        public RegistrationBuilder since(final RegistrationAction<CU, SU> action) {
+            Preconditions.checkState(!completed, "Range chain already completed");
+            completed = true;
+            return RegistrationBuilder.this.since(currentMin, action);
+        }
+    }
+
+    public final class TypedRangesBuilder<CU extends ClientboundPacketType, SU extends ServerboundPacketType, R> extends RangesBuilder<CU, SU> {
+        private final Function<RegistrationContext<CU, SU>, R> adapter;
+
+        private TypedRangesBuilder(final Function<RegistrationContext<CU, SU>, R> adapter, final ProtocolVersion min) {
+            super(min);
+            this.adapter = adapter;
+        }
+
+        public TypedRangesBuilder<CU, SU, R> to(final ProtocolVersion max, final TypedRegistrationAction<CU, SU, R> action) {
+            to(max, wrapAction(action));
+            return this;
+        }
+
+        public TypedRangesBuilder<CU, SU, R> since(final TypedRegistrationAction<CU, SU, R> action) {
+            since(wrapAction(action));
+            return this;
+        }
+
+        private RegistrationAction<CU, SU> wrapAction(final TypedRegistrationAction<CU, SU, R> action) {
+            return ctx -> {
+                final R rewriter = adapter.apply(ctx);
+                if (rewriter != null) {
+                    action.accept(ctx, rewriter);
+                }
+            };
+        }
+    }
+
+    @FunctionalInterface
+    public interface TypedRegistrationAction<CU extends ClientboundPacketType, SU extends ServerboundPacketType, R> {
+
+        void accept(RegistrationContext<CU, SU> ctx, R r);
+    }
+
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/RegistrationContext.java

@@ -0,0 +1,127 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration;
+
+import com.google.common.base.Preconditions;
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.api.protocol.remapper.PacketHandler;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import java.util.function.Consumer;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+public record RegistrationContext<CU extends ClientboundPacketType, SU extends ServerboundPacketType>(
+    AbstractProtocol<CU, ?, ?, SU> protocol,
+    ProtocolVersion min,
+    @Nullable ProtocolVersion max
+) {
+
+    public <P extends AbstractProtocol<CU, ?, ?, SU>> P protocol(@SuppressWarnings("unused") final Class<P> protocolClass) {
+        //noinspection unchecked
+        return (P) protocol;
+    }
+
+    public <P extends AbstractProtocol<CU, ?, ?, SU>> P castProtocol() {
+        //noinspection unchecked
+        return (P) protocol;
+    }
+
+    public void clientbound(final ClientboundPacketType type, final Consumer<CU> action) {
+        action.accept(clientboundPacketType(type));
+    }
+
+    public void clientbound(final ClientboundPacketType type, final Consumer<CU> action, final PacketBound... markers) {
+        if (!shouldSkip(markers)) {
+            action.accept(clientboundPacketType(type));
+        }
+    }
+
+    public void clientboundHandler(final ClientboundPacketType type, final PacketHandler handler) {
+        protocol.registerClientbound(clientboundPacketType(type), handler);
+    }
+
+    public void clientboundHandler(final ClientboundPacketType type, final PacketHandler handler, final PacketBound... markers) {
+        if (!shouldSkip(markers)) {
+            protocol.registerClientbound(clientboundPacketType(type), handler);
+        }
+    }
+
+    public void serverbound(final ServerboundPacketType type, final Consumer<SU> action) {
+        action.accept(serverboundPacketType(type));
+    }
+
+    public void serverbound(final ServerboundPacketType type, final Consumer<SU> action, final PacketBound... markers) {
+        if (!shouldSkip(markers)) {
+            action.accept(serverboundPacketType(type));
+        }
+    }
+
+    public void serverboundHandler(final ServerboundPacketType type, final PacketHandler handler) {
+        protocol.registerServerbound(serverboundPacketType(type), handler);
+    }
+
+    public void serverboundHandler(final ServerboundPacketType type, final PacketHandler handler, final PacketBound... markers) {
+        if (!shouldSkip(markers)) {
+            protocol.registerServerbound(serverboundPacketType(type), handler);
+        }
+    }
+
+    private boolean shouldSkip(final PacketBound... markers) {
+        if (markers.length == 0) {
+            return false;
+        }
+
+        final ProtocolVersion serverVersion = protocol.getServerVersion();
+        final ProtocolVersion clientVersion = protocol.getClientVersion();
+        final ProtocolVersion lowerVersion = serverVersion.olderThan(clientVersion) ? serverVersion : clientVersion;
+        final ProtocolVersion higherVersion = serverVersion.newerThan(clientVersion) ? serverVersion : clientVersion;
+        for (final PacketBound marker : markers) {
+            switch (marker) {
+                case ADDED_AT_MIN -> {
+                    if (lowerVersion.olderThan(min)) {
+                        return true;
+                    }
+                }
+                case REMOVED_AT_MAX -> {
+                    Preconditions.checkArgument(max != null, "Cannot use REMOVED_AT_MAX in an open-ended range");
+                    if (higherVersion.newerThanOrEqualTo(max)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    private SU serverboundPacketType(final ServerboundPacketType genericPacketType) {
+        final SU type = protocol.getPacketTypesProvider().unmappedServerboundType(genericPacketType.state(), genericPacketType.getName());
+        if (type == null) {
+            throw new IllegalArgumentException("Could not find serverbound packet type for " + genericPacketType.state() + " " + genericPacketType.getName());
+        }
+        return type;
+    }
+
+    private CU clientboundPacketType(final ClientboundPacketType genericPacketType) {
+        final CU type = protocol.getPacketTypesProvider().unmappedClientboundType(genericPacketType.state(), genericPacketType.getName());
+        if (type == null) {
+            throw new IllegalArgumentException("Could not find clientbound packet type for " + genericPacketType.state() + " " + genericPacketType.getName() + " in " + protocol.getClass().getSimpleName());
+        }
+        return type;
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/SharedRegistrations.java

@@ -0,0 +1,107 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration;
+
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import com.viaversion.viaversion.api.protocol.version.VersionType;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.EnumMap;
+import java.util.List;
+
+/**
+ * Central registry for shared packet registrations that are automatically applied
+ * to protocols based on their version range.
+ * <p>
+ * Registrations are done BEFORE registerPackets in {@link AbstractProtocol}.
+ */
+public final class SharedRegistrations {
+    private static final SharedRegistrations DEFAULT_REGISTRATIONS = new SharedRegistrations();
+
+    private final EnumMap<VersionType, List<VersionedTemplateGroup>> versionedTemplates = new EnumMap<>(VersionType.class);
+
+    /**
+     * Returns the default ViaVersion registration set.
+     */
+    public static SharedRegistrations defaultRegistrations() {
+        return DEFAULT_REGISTRATIONS;
+    }
+
+    /**
+     * Creates an independent shared registration set that external projects can populate and apply.
+     */
+    public static SharedRegistrations create() {
+        return new SharedRegistrations();
+    }
+
+    public RegistrationBuilder registrations() {
+        return new RegistrationBuilder(this);
+    }
+
+    /**
+     * Applies all shared registrations whose version range matches the given protocol.
+     *
+     * @param protocol the protocol to apply shared registrations to
+     */
+    public void applyMatching(final AbstractProtocol<?, ?, ?, ?> protocol) {
+        if (protocol.isBaseProtocol()) {
+            return;
+        }
+
+        final ProtocolVersion version = protocol.getServerVersion();
+        if (version.getVersionType() != protocol.getClientVersion().getVersionType()) {
+            // Built on continuous version ranges
+            return;
+        }
+
+        final List<VersionedTemplateGroup> groups = versionedTemplates.get(version.getVersionType());
+        if (groups == null) {
+            return;
+        }
+
+        for (final VersionedTemplateGroup group : groups) {
+            if (group.min().newerThan(version)) { // TODO binary search?
+                // Sorted by the minimum, so we can stop early if we're out
+                break;
+            }
+
+            if (group.max() != null && version.newerThanOrEqualTo(group.max())) {
+                continue;
+            }
+
+            final RegistrationContext<?, ?> context = new RegistrationContext<>(protocol, group.min(), group.max());
+            //noinspection unchecked,rawtypes
+            ((RegistrationAction) group.action()).accept(context);
+        }
+    }
+
+    @FunctionalInterface
+    public interface RegistrationAction<CU extends ClientboundPacketType, SU extends ServerboundPacketType> {
+
+        void accept(RegistrationContext<CU, SU> context);
+    }
+
+    void register(final VersionType versionType, final List<VersionedTemplateGroup> toAdd) {
+        final List<VersionedTemplateGroup> groups = versionedTemplates.computeIfAbsent(versionType, $ -> new ArrayList<>());
+        groups.addAll(toAdd);
+        groups.sort(Comparator.comparing(VersionedTemplateGroup::min, Comparator.nullsFirst(Comparator.naturalOrder())));
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/VersionedTemplateGroup.java

@@ -0,0 +1,32 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration;
+
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import com.viaversion.viaversion.protocol.shared_registration.SharedRegistrations.RegistrationAction;
+
+record VersionedTemplateGroup(
+    RegistrationAction<?, ?> action,
+    ProtocolVersion min,
+    ProtocolVersion max
+) {
+
+    public boolean contains(final ProtocolVersion version) {
+        return version.newerThanOrEqualTo(min) && (max == null || version.olderThan(max));
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/BlockRegistrations.java

@@ -0,0 +1,95 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.protocol.shared_registration.PacketBound;
+import com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
+import com.viaversion.viaversion.protocols.v1_14_3to1_14_4.packet.ClientboundPackets1_14_4;
+import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ClientboundPackets1_16_2;
+import com.viaversion.viaversion.protocols.v1_17_1to1_18.packet.ClientboundPackets1_18;
+import com.viaversion.viaversion.protocols.v1_18_2to1_19.packet.ClientboundPackets1_19;
+import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ClientboundPackets1_19_4;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPackets1_21;
+import com.viaversion.viaversion.rewriter.BlockRewriter;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+final class BlockRegistrations {
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_13(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_13(ctx, br);
+        ctx.clientbound(ClientboundPackets1_13.CHUNK_BLOCKS_UPDATE, br::registerChunkBlocksUpdate);
+    }
+
+    private static <CU extends ClientboundPacketType> void common1_13(RegistrationContext<CU, ?> ctx, BlockRewriter<CU> br) {
+        ctx.clientbound(ClientboundPackets1_13.BLOCK_EVENT, br::registerBlockEvent);
+        ctx.clientbound(ClientboundPackets1_13.BLOCK_UPDATE, br::registerBlockUpdate);
+        ctx.clientbound(ClientboundPackets1_13.LEVEL_EVENT, br::registerLevelEvent1_13);
+    }
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_14_4(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_13(ctx, br);
+        ctx.clientbound(ClientboundPackets1_14_4.CHUNK_BLOCKS_UPDATE, br::registerChunkBlocksUpdate, PacketBound.REMOVED_AT_MAX);
+        ctx.clientbound(ClientboundPackets1_14_4.BLOCK_BREAK_ACK, br::registerBlockBreakAck, PacketBound.ADDED_AT_MIN);
+    }
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_16_2(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_13(ctx, br);
+        ctx.clientbound(ClientboundPackets1_16_2.BLOCK_BREAK_ACK, br::registerBlockBreakAck);
+        ctx.clientbound(ClientboundPackets1_16_2.SECTION_BLOCKS_UPDATE, br::registerSectionBlocksUpdate, PacketBound.ADDED_AT_MIN);
+    }
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_18(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_13(ctx, br);
+        ctx.clientbound(ClientboundPackets1_18.BLOCK_BREAK_ACK, br::registerBlockBreakAck, PacketBound.REMOVED_AT_MAX);
+        ctx.clientbound(ClientboundPackets1_18.LEVEL_CHUNK_WITH_LIGHT, br::registerLevelChunk1_18, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_18.SECTION_BLOCKS_UPDATE, br::registerSectionBlocksUpdate);
+        ctx.clientbound(ClientboundPackets1_18.BLOCK_ENTITY_DATA, br::registerBlockEntityData1_18);
+    }
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_19(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_19(ctx, br);
+        ctx.clientbound(ClientboundPackets1_19.LEVEL_EVENT, br::registerLevelEvent1_13);
+        ctx.clientbound(ClientboundPackets1_19.SECTION_BLOCKS_UPDATE, br::registerSectionBlocksUpdate);
+    }
+
+    private static <CU extends ClientboundPacketType> void common1_19(RegistrationContext<CU, ?> ctx, BlockRewriter<CU> br) {
+        ctx.clientbound(ClientboundPackets1_19.BLOCK_EVENT, br::registerBlockEvent);
+        ctx.clientbound(ClientboundPackets1_19.BLOCK_UPDATE, br::registerBlockUpdate);
+        ctx.clientbound(ClientboundPackets1_19.LEVEL_CHUNK_WITH_LIGHT, br::registerLevelChunk1_18);
+        ctx.clientbound(ClientboundPackets1_19.BLOCK_ENTITY_DATA, br::registerBlockEntityData1_18);
+    }
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_20(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_19(ctx, br);
+        ctx.clientbound(ClientboundPackets1_19_4.LEVEL_EVENT, br::registerLevelEvent1_13);
+        ctx.clientbound(ClientboundPackets1_19_4.SECTION_BLOCKS_UPDATE, br::registerSectionBlocksUpdate1_20);
+    }
+
+    static <CU extends ClientboundPacketType> void registerBlockPackets1_21(final RegistrationContext<CU, ?> ctx, final BlockRewriter<CU> br) {
+        common1_19(ctx, br);
+        ctx.clientbound(ClientboundPackets1_21.LEVEL_EVENT, br::registerLevelEvent1_21);
+        ctx.clientbound(ClientboundPackets1_21.SECTION_BLOCKS_UPDATE, br::registerSectionBlocksUpdate1_20);
+    }
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> BlockRewriter<CU> block(final RegistrationContext<CU, SU> ctx) {
+        return ctx.protocol().getBlockRewriter();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/DefaultRegistrations.java

@@ -0,0 +1,110 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.protocol.version.ProtocolVersion;
+import com.viaversion.viaversion.protocol.shared_registration.SharedRegistrations;
+
+public final class DefaultRegistrations {
+
+    public static void apply() {
+        SharedRegistrations.defaultRegistrations().registrations()
+            .ranges(EntityRegistrations::entity, ProtocolVersion.v1_13, b -> b
+                .to(ProtocolVersion.v1_14_4, EntityRegistrations::registerEntityPackets1_13)
+                .to(ProtocolVersion.v1_16_2, EntityRegistrations::registerEntityPackets1_14_4)
+                .to(ProtocolVersion.v1_17_1, EntityRegistrations::registerEntityPackets1_16_2)
+                .to(ProtocolVersion.v1_19, EntityRegistrations::registerEntityPackets1_17_1)
+                .to(ProtocolVersion.v1_20_5, EntityRegistrations::registerEntityPackets1_19)
+                .to(ProtocolVersion.v1_21_4, EntityRegistrations::registerEntityPackets1_20_5)
+                .to(ProtocolVersion.v1_21_9, EntityRegistrations::registerEntityPackets1_21_4)
+                .since(EntityRegistrations::registerEntityPackets1_21_9)
+            )
+
+            .ranges(ItemRegistrations::item, ProtocolVersion.v1_13, b -> b
+                .to(ProtocolVersion.v1_14, ItemRegistrations::registerItemPackets1_13)
+                .to(ProtocolVersion.v1_14_4, ItemRegistrations::registerItemPackets1_14)
+                .to(ProtocolVersion.v1_16, ItemRegistrations::registerItemPackets1_14_4)
+                .to(ProtocolVersion.v1_17_1, ItemRegistrations::registerItemPackets1_16)
+                .to(ProtocolVersion.v1_19_1, ItemRegistrations::registerItemPackets1_17_1)
+                .to(ProtocolVersion.v1_20_3, ItemRegistrations::registerItemPackets1_19_1)
+                .to(ProtocolVersion.v1_20_5, ItemRegistrations::registerItemPackets1_20_3)
+                .to(ProtocolVersion.v1_21, ItemRegistrations::registerItemPackets1_20_5)
+                .to(ProtocolVersion.v1_21_2, ItemRegistrations::registerItemPackets1_21)
+                .to(ProtocolVersion.v1_21_5, ItemRegistrations::registerItemPackets1_21_2)
+            )
+            .ranges(ItemRegistrations::structuredItem, ProtocolVersion.v1_21_5, b -> b
+                .to(ProtocolVersion.v1_21_6, ItemRegistrations::registerItemPackets1_21_5)
+                .since(ItemRegistrations::registerItemPackets1_21_6)
+            )
+
+            .ranges(BlockRegistrations::block, ProtocolVersion.v1_13, steps -> steps
+                .to(ProtocolVersion.v1_14_4, BlockRegistrations::registerBlockPackets1_13)
+                .to(ProtocolVersion.v1_16_2, BlockRegistrations::registerBlockPackets1_14_4)
+                .to(ProtocolVersion.v1_18, BlockRegistrations::registerBlockPackets1_16_2)
+                .to(ProtocolVersion.v1_19, BlockRegistrations::registerBlockPackets1_18)
+                .to(ProtocolVersion.v1_20, BlockRegistrations::registerBlockPackets1_19)
+                .to(ProtocolVersion.v1_21, BlockRegistrations::registerBlockPackets1_20)
+                .since(BlockRegistrations::registerBlockPackets1_21)
+            )
+
+            .ranges(ParticleRegistrations::particle, ProtocolVersion.v1_13, steps -> steps
+                .to(ProtocolVersion.v1_15_2, ParticleRegistrations::registerParticlePackets1_13)
+                .to(ProtocolVersion.v1_19, ParticleRegistrations::registerParticlePackets1_15_2)
+                .to(ProtocolVersion.v1_20, ParticleRegistrations::registerParticlePackets1_19)
+                .to(ProtocolVersion.v1_20_5, ParticleRegistrations::registerParticlePackets1_20)
+                .to(ProtocolVersion.v1_21_2, ParticleRegistrations::registerParticlePackets1_20_5)
+                .to(ProtocolVersion.v1_21_4, ParticleRegistrations::registerParticlePackets1_21_2)
+                .to(ProtocolVersion.v1_21_9, ParticleRegistrations::registerParticlePackets1_21_4)
+                .since(ParticleRegistrations::registerParticlePackets1_21_9)
+            )
+
+            .ranges(TextComponentRegistrations::text, ProtocolVersion.v1_12_2, b -> b
+                .to(ProtocolVersion.v1_14, TextComponentRegistrations::registerComponents1_12_2)
+                .to(ProtocolVersion.v1_16_2, TextComponentRegistrations::registerComponents1_14)
+                .to(ProtocolVersion.v1_17, TextComponentRegistrations::registerComponents1_16_2)
+                .to(ProtocolVersion.v1_19, TextComponentRegistrations::registerComponents1_17)
+                .to(ProtocolVersion.v1_20_3, TextComponentRegistrations::registerComponents1_19)
+                .to(ProtocolVersion.v1_20_5, TextComponentRegistrations::registerComponents1_20_3)
+                .to(ProtocolVersion.v1_21, TextComponentRegistrations::registerComponents1_20_5)
+                .to(ProtocolVersion.v1_21_4, TextComponentRegistrations::registerComponents1_21)
+                .to(ProtocolVersion.v1_21_5, TextComponentRegistrations::registerComponents1_21_4)
+            )
+            .ranges(TextComponentRegistrations::nbtText, ProtocolVersion.v1_21_5, b -> b
+                .since(TextComponentRegistrations::registerComponents1_21_5)
+            )
+
+            .ranges(ProtocolVersion.v1_17_1, sbeps -> sbeps
+                .to(ProtocolVersion.v1_20_2, RegistryRegistrations::registerTags1_17_1)
+                .since(RegistryRegistrations::registerTags1_20_2)
+            )
+
+            .ranges(ProtocolVersion.v1_10, b -> b
+                .to(ProtocolVersion.v1_14, RegistryRegistrations::registerSounds1_10)
+                .to(ProtocolVersion.v1_19_3, RegistryRegistrations::registerSounds1_14)
+                .since(RegistryRegistrations::registerSounds1_19_3)
+            )
+
+            .since(ProtocolVersion.v1_13, RegistryRegistrations::registerStatistics1_13)
+            .since(ProtocolVersion.v1_19, RegistryRegistrations::registerCommands1_19)
+            .since(ProtocolVersion.v1_21, RegistryRegistrations::registerRegistryData1_21)
+            .since(ProtocolVersion.v1_21, RegistryRegistrations::registerAttributes1_21)
+            .since(ProtocolVersion.v1_21_2, RegistryRegistrations::registerRecipePackets1_21_2)
+
+            .register();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/EntityRegistrations.java

@@ -0,0 +1,96 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.protocol.shared_registration.PacketBound;
+import com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
+import com.viaversion.viaversion.protocols.v1_14_3to1_14_4.packet.ClientboundPackets1_14_4;
+import com.viaversion.viaversion.protocols.v1_18_2to1_19.packet.ClientboundPackets1_19;
+import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ClientboundPackets1_21_9;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.protocols.v1_8to1_9.packet.ClientboundPackets1_9;
+import com.viaversion.viaversion.rewriter.EntityRewriter;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+final class EntityRegistrations {
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_13(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        ctx.clientbound(ClientboundPackets1_13.REMOVE_ENTITIES, er::registerRemoveEntities);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_14_4(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        ctx.clientbound(ClientboundPackets1_14_4.REMOVE_ENTITIES, er::registerRemoveEntities);
+        ctx.clientbound(ClientboundPackets1_14_4.ADD_ENTITY, er::registerTrackerWithData);
+        ctx.clientbound(ClientboundPackets1_14_4.ADD_MOB, er::registerTracker);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_16_2(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        // remove_entities got temporarily changed to only take a single entity...
+        ctx.clientbound(ClientboundPackets1_14_4.ADD_ENTITY, er::registerTrackerWithData);
+        ctx.clientbound(ClientboundPackets1_14_4.ADD_MOB, er::registerTracker);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_17_1(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        ctx.clientbound(ClientboundPackets1_14_4.REMOVE_ENTITIES, er::registerRemoveEntities);
+        ctx.clientbound(ClientboundPackets1_14_4.ADD_ENTITY, er::registerTrackerWithData);
+        ctx.clientbound(ClientboundPackets1_14_4.ADD_MOB, er::registerTracker, PacketBound.REMOVED_AT_MAX);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_19(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        ctx.clientbound(ClientboundPackets1_9.REMOVE_ENTITIES, er::registerRemoveEntities);
+        ctx.clientbound(ClientboundPackets1_19.ADD_ENTITY, er::registerTrackerWithData1_19);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_20_5(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        common1_20_5(ctx, er);
+        ctx.clientbound(ClientboundPackets1_19.ADD_ENTITY, er::registerTrackerWithData1_19);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_21_4(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        common1_20_5(ctx, er);
+        registerGameModeTrackers1_21_4(ctx, er);
+        ctx.clientbound(ClientboundPackets1_21_2.ADD_ENTITY, er::registerTrackerWithData1_19);
+    }
+
+    static <CU extends ClientboundPacketType> void registerEntityPackets1_21_9(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        common1_20_5(ctx, er);
+        registerGameModeTrackers1_21_4(ctx, er);
+        ctx.clientbound(ClientboundPackets1_21_9.ADD_ENTITY, er::registerTrackerWithData1_21_9);
+    }
+
+    private static <CU extends ClientboundPacketType> void common1_20_5(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        ctx.clientbound(ClientboundPackets1_20_5.SET_ENTITY_DATA, er::registerSetEntityData);
+        ctx.clientbound(ClientboundPackets1_20_5.REMOVE_ENTITIES, er::registerRemoveEntities);
+        ctx.clientbound(ClientboundPackets1_20_5.LOGIN, er::registerLogin1_20_5);
+        ctx.clientbound(ClientboundPackets1_20_5.RESPAWN, er::registerRespawn1_20_5);
+    }
+
+    private static <CU extends ClientboundPacketType> void registerGameModeTrackers1_21_4(final RegistrationContext<CU, ?> ctx, final EntityRewriter<CU, ?> er) {
+        ctx.clientbound(ClientboundPackets1_21_2.GAME_EVENT, er::registerGameEvent);
+        ctx.clientbound(ClientboundPackets1_21_2.PLAYER_ABILITIES, er::registerPlayerAbilities);
+    }
+
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> EntityRewriter<CU, ?> entity(final RegistrationContext<CU, SU> ctx) {
+        return ctx.protocol().getEntityRewriter();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/ItemRegistrations.java

@@ -0,0 +1,185 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.protocol.shared_registration.PacketBound;
+import com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ServerboundPackets1_13;
+import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ClientboundPackets1_14;
+import com.viaversion.viaversion.protocols.v1_14_3to1_14_4.packet.ClientboundPackets1_14_4;
+import com.viaversion.viaversion.protocols.v1_15_2to1_16.packet.ClientboundPackets1_16;
+import com.viaversion.viaversion.protocols.v1_16_4to1_17.packet.ServerboundPackets1_17;
+import com.viaversion.viaversion.protocols.v1_17to1_17_1.packet.ClientboundPackets1_17_1;
+import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ServerboundPackets1_19_3;
+import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.packet.ClientboundPackets1_19_4;
+import com.viaversion.viaversion.protocols.v1_19to1_19_1.packet.ClientboundPackets1_19_1;
+import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.packet.ClientboundPackets1_20_3;
+import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.packet.ServerboundPackets1_20_3;
+import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ServerboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPackets1_21;
+import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ClientboundPackets1_20_2;
+import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ServerboundPackets1_20_2;
+import com.viaversion.viaversion.protocols.v1_21_4to1_21_5.packet.ClientboundPackets1_21_5;
+import com.viaversion.viaversion.protocols.v1_21_4to1_21_5.packet.ServerboundPackets1_21_5;
+import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundConfigurationPackets1_21_6;
+import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPackets1_21_6;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ServerboundPackets1_21_2;
+import com.viaversion.viaversion.rewriter.ItemRewriter;
+import com.viaversion.viaversion.rewriter.StructuredItemRewriter;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+final class ItemRegistrations {
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_13(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        common1_13(ctx, ir);
+        ctx.clientbound(ClientboundPackets1_13.SET_EQUIPPED_ITEM, ir::registerSetEquippedItem);
+    }
+
+    private static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void common1_13(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_13.CONTAINER_SET_DATA, ir::registerContainerSetData);
+        ctx.clientbound(ClientboundPackets1_13.CONTAINER_SET_SLOT, ir::registerSetSlot);
+        ctx.clientbound(ClientboundPackets1_13.CONTAINER_SET_CONTENT, ir::registerSetContent);
+        ctx.clientbound(ClientboundPackets1_13.UPDATE_ADVANCEMENTS, ir::registerAdvancements);
+        ctx.clientbound(ClientboundPackets1_13.COOLDOWN, ir::registerCooldown);
+        ctx.serverbound(ServerboundPackets1_13.CONTAINER_CLICK, ir::registerContainerClick);
+        ctx.serverbound(ServerboundPackets1_13.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_14(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        common1_13(ctx, ir);
+        ctx.clientbound(ClientboundPackets1_14.SET_EQUIPPED_ITEM, ir::registerSetEquippedItem);
+        ctx.clientbound(ClientboundPackets1_14.OPEN_SCREEN, ir::registerOpenScreen);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_14_4(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        common1_13(ctx, ir);
+        ctx.clientbound(ClientboundPackets1_14_4.SET_EQUIPPED_ITEM, ir::registerSetEquippedItem, PacketBound.REMOVED_AT_MAX);
+        ctx.clientbound(ClientboundPackets1_14_4.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_14_4.MERCHANT_OFFERS, ir::registerMerchantOffers1_14_4);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_16(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        common1_13(ctx, ir);
+        ctx.clientbound(ClientboundPackets1_16.SET_EQUIPMENT, ir::registerSetEquipment, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_16.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_16.MERCHANT_OFFERS, ir::registerMerchantOffers1_14_4);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_17_1(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_17_1.CONTAINER_SET_DATA, ir::registerContainerSetData);
+        ctx.clientbound(ClientboundPackets1_17_1.CONTAINER_SET_SLOT, ir::registerSetSlot1_17_1);
+        ctx.clientbound(ClientboundPackets1_17_1.CONTAINER_SET_CONTENT, ir::registerSetContent1_17_1);
+        ctx.clientbound(ClientboundPackets1_17_1.UPDATE_ADVANCEMENTS, ir::registerAdvancements);
+        ctx.clientbound(ClientboundPackets1_17_1.COOLDOWN, ir::registerCooldown);
+        ctx.serverbound(ServerboundPackets1_17.CONTAINER_CLICK, ir::registerContainerClick1_17_1);
+        ctx.serverbound(ServerboundPackets1_17.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot);
+        ctx.clientbound(ClientboundPackets1_17_1.SET_EQUIPMENT, ir::registerSetEquipment);
+        ctx.clientbound(ClientboundPackets1_17_1.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_17_1.MERCHANT_OFFERS, ir::registerMerchantOffers1_14_4);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_19_1(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_19_1.CONTAINER_SET_DATA, ir::registerContainerSetData);
+        ctx.clientbound(ClientboundPackets1_19_1.CONTAINER_SET_SLOT, ir::registerSetSlot1_17_1);
+        ctx.clientbound(ClientboundPackets1_19_1.CONTAINER_SET_CONTENT, ir::registerSetContent1_17_1);
+        ctx.clientbound(ClientboundPackets1_19_1.UPDATE_ADVANCEMENTS, ir::registerAdvancements);
+        ctx.clientbound(ClientboundPackets1_19_1.COOLDOWN, ir::registerCooldown);
+        ctx.serverbound(ServerboundPackets1_19_3.CONTAINER_CLICK, ir::registerContainerClick1_17_1);
+        ctx.serverbound(ServerboundPackets1_19_3.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot);
+        ctx.clientbound(ClientboundPackets1_19_1.SET_EQUIPMENT, ir::registerSetEquipment);
+        ctx.clientbound(ClientboundPackets1_19_1.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_19_1.MERCHANT_OFFERS, ir::registerMerchantOffers1_19);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_20_3(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_20_3.CONTAINER_SET_DATA, ir::registerContainerSetData);
+        ctx.clientbound(ClientboundPackets1_20_3.CONTAINER_SET_SLOT, ir::registerSetSlot1_17_1);
+        ctx.clientbound(ClientboundPackets1_20_3.CONTAINER_SET_CONTENT, ir::registerSetContent1_17_1);
+        ctx.clientbound(ClientboundPackets1_20_5.UPDATE_ADVANCEMENTS, ir::registerAdvancements1_20_3);
+        ctx.clientbound(ClientboundPackets1_20_3.COOLDOWN, ir::registerCooldown);
+        ctx.serverbound(ServerboundPackets1_20_3.CONTAINER_CLICK, ir::registerContainerClick1_17_1);
+        ctx.serverbound(ServerboundPackets1_20_2.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_EQUIPMENT, ir::registerSetEquipment);
+        ctx.clientbound(ClientboundPackets1_19_4.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_20_2.MERCHANT_OFFERS, ir::registerMerchantOffers1_19);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_20_5(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_20_3.CONTAINER_SET_DATA, ir::registerContainerSetData);
+        registerItemPackets1_21(ctx, ir);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_21(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_21.CONTAINER_SET_SLOT, ir::registerSetSlot1_17_1);
+        ctx.clientbound(ClientboundPackets1_21.CONTAINER_SET_CONTENT, ir::registerSetContent1_17_1);
+        ctx.clientbound(ClientboundPackets1_21.UPDATE_ADVANCEMENTS, ir::registerAdvancements1_20_3);
+        ctx.clientbound(ClientboundPackets1_21.COOLDOWN, ir::registerCooldown);
+        ctx.serverbound(ServerboundPackets1_20_5.CONTAINER_CLICK, ir::registerContainerClick1_17_1);
+        ctx.serverbound(ServerboundPackets1_20_5.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot);
+        ctx.clientbound(ClientboundPackets1_21.SET_EQUIPMENT, ir::registerSetEquipment);
+        ctx.clientbound(ClientboundPackets1_21.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_21.MERCHANT_OFFERS, ir::registerMerchantOffers1_20_5);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_21_2(final RegistrationContext<CU, SU> ctx, final ItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_21_2.CONTAINER_SET_SLOT, ir::registerSetSlot1_21_2);
+        ctx.clientbound(ClientboundPackets1_21_2.CONTAINER_SET_CONTENT, ir::registerSetContent1_21_2);
+        ctx.clientbound(ClientboundPackets1_21_2.UPDATE_ADVANCEMENTS, ir::registerAdvancements1_20_3);
+        ctx.clientbound(ClientboundPackets1_21_2.COOLDOWN, ir::registerCooldown1_21_2);
+        ctx.serverbound(ServerboundPackets1_21_2.CONTAINER_CLICK, ir::registerContainerClick1_21_2);
+        ctx.serverbound(ServerboundPackets1_21_2.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot);
+        ctx.clientbound(ClientboundPackets1_21_2.SET_EQUIPMENT, ir::registerSetEquipment);
+        ctx.clientbound(ClientboundPackets1_21_2.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_21_2.MERCHANT_OFFERS, ir::registerMerchantOffers1_20_5);
+        ctx.clientbound(ClientboundPackets1_21_2.SET_PLAYER_INVENTORY, ir::registerSetPlayerInventory, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_21_2.SET_CURSOR_ITEM, ir::registerSetCursorItem, PacketBound.ADDED_AT_MIN);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_21_5(final RegistrationContext<CU, SU> ctx, final StructuredItemRewriter<CU, SU, ?> ir) {
+        ctx.clientbound(ClientboundPackets1_21_5.CONTAINER_SET_SLOT, ir::registerSetSlot1_21_2);
+        ctx.clientbound(ClientboundPackets1_21_5.CONTAINER_SET_CONTENT, ir::registerSetContent1_21_2);
+        ctx.clientbound(ClientboundPackets1_21_5.UPDATE_ADVANCEMENTS, ir::registerAdvancements1_20_3);
+        ctx.clientbound(ClientboundPackets1_21_5.COOLDOWN, ir::registerCooldown1_21_2);
+        ctx.serverbound(ServerboundPackets1_21_5.CONTAINER_CLICK, ir::registerContainerClick1_21_5);
+        ctx.serverbound(ServerboundPackets1_21_5.SET_CREATIVE_MODE_SLOT, ir::registerSetCreativeModeSlot1_21_5);
+        ctx.clientbound(ClientboundPackets1_21_5.SET_EQUIPMENT, ir::registerSetEquipment);
+        ctx.clientbound(ClientboundPackets1_21_5.OPEN_SCREEN, ir::registerOpenScreen);
+        ctx.clientbound(ClientboundPackets1_21_5.MERCHANT_OFFERS, ir::registerMerchantOffers1_20_5);
+        ctx.clientbound(ClientboundPackets1_21_5.SET_PLAYER_INVENTORY, ir::registerSetPlayerInventory);
+        ctx.clientbound(ClientboundPackets1_21_5.SET_CURSOR_ITEM, ir::registerSetCursorItem);
+    }
+
+    static <CU extends ClientboundPacketType, SU extends ServerboundPacketType> void registerItemPackets1_21_6(final RegistrationContext<CU, SU> ctx, final StructuredItemRewriter<CU, SU, ?> ir) {
+        registerItemPackets1_21_5(ctx, ir);
+        ctx.clientbound(ClientboundPackets1_21_6.SHOW_DIALOG, ir::registerShowDialog, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundConfigurationPackets1_21_6.SHOW_DIALOG, ir::registerShowDialogDirect, PacketBound.ADDED_AT_MIN);
+    }
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> ItemRewriter<CU, SU, ?> item(final RegistrationContext<CU, SU> ctx) {
+        return ctx.protocol().getItemRewriter();
+    }
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> StructuredItemRewriter<CU, SU, ?> structuredItem(final RegistrationContext<CU, SU> ctx) {
+        return (StructuredItemRewriter<CU, SU, ?>) ctx.protocol().getItemRewriter();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/ParticleRegistrations.java

@@ -0,0 +1,74 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
+import com.viaversion.viaversion.protocols.v1_14_4to1_15.packet.ClientboundPackets1_15;
+import com.viaversion.viaversion.protocols.v1_18_2to1_19.packet.ClientboundPackets1_19;
+import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ClientboundPackets1_21_9;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.rewriter.ParticleRewriter;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+final class ParticleRegistrations {
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_13(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_13.LEVEL_PARTICLES, type -> pr.registerLevelParticles1_13(type, Types.FLOAT));
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_15_2(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_15.LEVEL_PARTICLES, type -> pr.registerLevelParticles1_13(type, Types.DOUBLE));
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_19(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_19.LEVEL_PARTICLES, pr::registerLevelParticles1_19);
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_20(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_19.LEVEL_PARTICLES, pr::registerLevelParticles1_19);
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_20_5(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_20_5.LEVEL_PARTICLES, pr::registerLevelParticles1_20_5);
+        ctx.clientbound(ClientboundPackets1_20_5.EXPLODE, pr::registerExplode1_20_5);
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_21_2(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_21_2.LEVEL_PARTICLES, pr::registerLevelParticles1_20_5);
+        ctx.clientbound(ClientboundPackets1_21_2.EXPLODE, pr::registerExplode1_21_2);
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_21_4(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_21_2.LEVEL_PARTICLES, pr::registerLevelParticles1_21_4);
+        ctx.clientbound(ClientboundPackets1_21_2.EXPLODE, pr::registerExplode1_21_2);
+    }
+
+    static <CU extends ClientboundPacketType> void registerParticlePackets1_21_9(final RegistrationContext<CU, ?> ctx, final ParticleRewriter<CU> pr) {
+        ctx.clientbound(ClientboundPackets1_21_9.LEVEL_PARTICLES, pr::registerLevelParticles1_21_4);
+        ctx.clientbound(ClientboundPackets1_21_9.EXPLODE, pr::registerExplode1_21_9);
+    }
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> ParticleRewriter<CU> particle(final RegistrationContext<CU, SU> ctx) {
+        return ctx.protocol().getParticleRewriter();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/RegistryRegistrations.java

@@ -0,0 +1,102 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.data.Mappings;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.protocol.shared_registration.PacketBound;
+import com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPackets1_13;
+import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ClientboundPackets1_14;
+import com.viaversion.viaversion.protocols.v1_17to1_17_1.packet.ClientboundPackets1_17_1;
+import com.viaversion.viaversion.protocols.v1_19_1to1_19_3.packet.ClientboundPackets1_19_3;
+import com.viaversion.viaversion.protocols.v1_19_3to1_19_4.rewriter.CommandRewriter1_19_4;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundConfigurationPackets1_21;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPackets1_21;
+import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ClientboundConfigurationPackets1_20_2;
+import com.viaversion.viaversion.protocols.v1_20to1_20_2.packet.ClientboundPackets1_20_2;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;
+import com.viaversion.viaversion.rewriter.AttributeRewriter;
+import com.viaversion.viaversion.rewriter.RecipeDisplayRewriter;
+import com.viaversion.viaversion.rewriter.SoundRewriter;
+import com.viaversion.viaversion.rewriter.StatisticsRewriter;
+
+final class RegistryRegistrations {
+
+    static <CU extends ClientboundPacketType> void registerTags1_17_1(final RegistrationContext<CU, ?> ctx) {
+        if (ctx.protocol().getTagRewriter() == null) return;
+        ctx.clientbound(ClientboundPackets1_17_1.UPDATE_TAGS, ctx.protocol().getTagRewriter()::registerGeneric);
+    }
+
+    static <CU extends ClientboundPacketType> void registerTags1_20_2(final RegistrationContext<CU, ?> ctx) {
+        if (ctx.protocol().getTagRewriter() == null) return;
+        ctx.clientbound(ClientboundPackets1_20_2.UPDATE_TAGS, ctx.protocol().getTagRewriter()::registerGeneric);
+        ctx.clientbound(ClientboundConfigurationPackets1_20_2.UPDATE_TAGS, ctx.protocol().getTagRewriter()::registerGeneric, PacketBound.ADDED_AT_MIN);
+    }
+
+
+    static <CU extends ClientboundPacketType> void registerRegistryData1_21(final RegistrationContext<CU, ?> ctx) {
+        if (ctx.protocol().getRegistryDataRewriter() == null) return;
+        ctx.clientboundHandler(ClientboundConfigurationPackets1_21.REGISTRY_DATA, ctx.protocol().getRegistryDataRewriter()::handle);
+    }
+
+
+    static <CU extends ClientboundPacketType> void registerRecipePackets1_21_2(final RegistrationContext<CU, ?> ctx) {
+        final RecipeDisplayRewriter<CU> rr = ctx.protocol().getRecipeRewriter();
+        if (rr == null) return;
+        ctx.clientbound(ClientboundPackets1_21_2.UPDATE_RECIPES, rr::registerUpdateRecipes);
+        ctx.clientbound(ClientboundPackets1_21_2.RECIPE_BOOK_ADD, rr::registerRecipeBookAdd, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_21_2.PLACE_GHOST_RECIPE, rr::registerPlaceGhostRecipe);
+    }
+
+
+    static <CU extends ClientboundPacketType> void registerStatistics1_13(final RegistrationContext<CU, ?> ctx) {
+        ctx.clientbound(ClientboundPackets1_13.AWARD_STATS, new StatisticsRewriter<>(ctx.protocol())::register);
+    }
+
+
+    static <CU extends ClientboundPacketType> void registerSounds1_10(final RegistrationContext<CU, ?> ctx) {
+        ctx.clientbound(ClientboundPackets1_9_3.SOUND, new SoundRewriter<>(ctx.protocol())::registerSound);
+    }
+
+    static <CU extends ClientboundPacketType> void registerSounds1_14(final RegistrationContext<CU, ?> ctx) {
+        final SoundRewriter<CU> sr = new SoundRewriter<>(ctx.protocol());
+        ctx.clientbound(ClientboundPackets1_14.SOUND, sr::registerSound);
+        ctx.clientbound(ClientboundPackets1_14.SOUND_ENTITY, sr::registerSound, PacketBound.ADDED_AT_MIN);
+    }
+
+    static <CU extends ClientboundPacketType> void registerSounds1_19_3(final RegistrationContext<CU, ?> ctx) {
+        final SoundRewriter<CU> sr = new SoundRewriter<>(ctx.protocol());
+        ctx.clientbound(ClientboundPackets1_19_3.SOUND, sr::registerSound1_19_3);
+        ctx.clientbound(ClientboundPackets1_19_3.SOUND_ENTITY, sr::registerSound1_19_3);
+    }
+
+
+    static <CU extends ClientboundPacketType> void registerCommands1_19(final RegistrationContext<CU, ?> ctx) {
+        if ((ctx.protocol().getMappingData() != null && !Mappings.isIntIdIdentity(ctx.protocol().getMappingData().getArgumentTypeMappings()))
+            || ctx.protocol().getRegistryDataRewriter() != null) {
+            ctx.clientbound(ClientboundPackets1_19_3.COMMANDS, new CommandRewriter1_19_4<>(ctx.protocol())::registerDeclareCommands1_19);
+        }
+    }
+
+
+    static <CU extends ClientboundPacketType> void registerAttributes1_21(final RegistrationContext<CU, ?> ctx) {
+        ctx.clientbound(ClientboundPackets1_21.UPDATE_ATTRIBUTES, new AttributeRewriter<>(ctx.protocol())::register1_21);
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocol/shared_registration/def/TextComponentRegistrations.java

@@ -0,0 +1,194 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocol.shared_registration.def;
+
+import com.viaversion.viaversion.api.minecraft.item.data.ChatType;
+import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
+import com.viaversion.viaversion.api.protocol.packet.ServerboundPacketType;
+import com.viaversion.viaversion.api.type.Types;
+import com.viaversion.viaversion.protocol.shared_registration.PacketBound;
+import com.viaversion.viaversion.protocol.shared_registration.RegistrationContext;
+import com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ClientboundPackets1_12_1;
+import com.viaversion.viaversion.protocols.v1_15_2to1_16.packet.ClientboundPackets1_16;
+import com.viaversion.viaversion.protocols.v1_16_1to1_16_2.packet.ClientboundPackets1_16_2;
+import com.viaversion.viaversion.protocols.v1_17to1_17_1.packet.ClientboundPackets1_17_1;
+import com.viaversion.viaversion.protocols.v1_18_2to1_19.packet.ClientboundPackets1_19;
+import com.viaversion.viaversion.protocols.v1_19to1_19_1.packet.ClientboundPackets1_19_1;
+import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.packet.ClientboundConfigurationPackets1_20_3;
+import com.viaversion.viaversion.protocols.v1_20_2to1_20_3.packet.ClientboundPackets1_20_3;
+import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundConfigurationPackets1_20_5;
+import com.viaversion.viaversion.protocols.v1_20_3to1_20_5.packet.ClientboundPackets1_20_5;
+import com.viaversion.viaversion.protocols.v1_20_5to1_21.packet.ClientboundPackets1_21;
+import com.viaversion.viaversion.protocols.v1_21_4to1_21_5.packet.ClientboundPackets1_21_5;
+import com.viaversion.viaversion.protocols.v1_21to1_21_2.packet.ClientboundPackets1_21_2;
+import com.viaversion.viaversion.rewriter.text.ComponentRewriterBase;
+import com.viaversion.viaversion.rewriter.text.JsonNBTComponentRewriter;
+import com.viaversion.viaversion.rewriter.text.NBTComponentRewriter;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+final class TextComponentRegistrations {
+
+    static <CU extends ClientboundPacketType> void registerComponents1_12_2(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        ctx.clientbound(ClientboundPackets1_12_1.CHAT, cr::registerComponentPacket);
+        registerCombatAndTitle1_12_2(ctx, cr);
+        registerComponentsFrom1_12_2(ctx, cr);
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_14(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        ctx.clientbound(ClientboundPackets1_12_1.CHAT, cr::registerComponentPacket);
+        registerCombatAndTitle1_12_2(ctx, cr);
+        registerComponentsFrom1_12_2(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_OBJECTIVE, cr::registerSetObjective);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_16_2(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        ctx.clientbound(ClientboundPackets1_16.CHAT, cr::registerComponentPacket);
+        registerComponentsFrom1_12_2(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_OBJECTIVE, cr::registerSetObjective);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+        if (!(cr instanceof final JsonNBTComponentRewriter<CU> jcr)) return;
+        ctx.clientbound(ClientboundPackets1_12_1.PLAYER_COMBAT, jcr::registerPlayerCombat, PacketBound.REMOVED_AT_MAX);
+        ctx.clientbound(ClientboundPackets1_12_1.SET_TITLES, jcr::registerTitle, PacketBound.REMOVED_AT_MAX);
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_17(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        ctx.clientbound(ClientboundPackets1_16.CHAT, cr::registerComponentPacket, PacketBound.REMOVED_AT_MAX);
+        registerComponentsFrom1_12_2(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_17_1.SET_ACTION_BAR_TEXT, cr::registerComponentPacket, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_17_1.SET_TITLE_TEXT, cr::registerComponentPacket, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_17_1.SET_SUBTITLE_TEXT, cr::registerComponentPacket, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_OBJECTIVE, cr::registerSetObjective);
+        if (cr instanceof final JsonNBTComponentRewriter<CU> jcr) {
+            ctx.clientbound(ClientboundPackets1_17_1.PLAYER_COMBAT_KILL, jcr::registerPlayerCombatKill, PacketBound.ADDED_AT_MIN);
+        }
+        ctx.clientbound(ClientboundPackets1_16_2.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_19(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        registerComponentsFrom1_12_2(ctx, cr);
+        registerActionBarTitleSubtitle1_17_1(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_OBJECTIVE, cr::registerSetObjective);
+        if (cr instanceof final JsonNBTComponentRewriter<CU> jcr) {
+            ctx.clientbound(ClientboundPackets1_17_1.PLAYER_COMBAT_KILL, jcr::registerPlayerCombatKill);
+        }
+        ctx.clientbound(ClientboundPackets1_16_2.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+        ctx.clientbound(ClientboundPackets1_19.SYSTEM_CHAT, cr::registerComponentPacket, PacketBound.ADDED_AT_MIN);
+        ctx.clientbound(ClientboundPackets1_19.SERVER_DATA, cr::registerComponentPacket, PacketBound.ADDED_AT_MIN);
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_20_3(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        registerComponentsFrom1_12_2(ctx, cr);
+        registerActionBarTitleSubtitle1_17_1(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_16_2.SET_OBJECTIVE, cr::registerSetObjective);
+        ctx.clientbound(ClientboundPackets1_19_1.SYSTEM_CHAT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundConfigurationPackets1_20_3.DISCONNECT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_3.DISGUISED_CHAT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_3.SET_SCORE, cr::registerSetScore1_20_3);
+        ctx.clientbound(ClientboundPackets1_20_3.PLAYER_COMBAT_KILL, cr::registerPlayerCombatKill1_20);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+        ctx.clientbound(ClientboundPackets1_19.SERVER_DATA, cr::registerComponentPacket);
+        if (cr instanceof final JsonNBTComponentRewriter<CU> jcr) {
+            ctx.clientbound(ClientboundPackets1_20_3.PLAYER_CHAT, cu -> jcr.registerPlayerChat(cu, Types.VAR_INT));
+            ctx.clientbound(ClientboundPackets1_20_3.PLAYER_INFO_UPDATE, jcr::registerPlayerInfoUpdate1_20_3);
+        }
+    }
+
+    static <CU extends ClientboundPacketType> void registerCombatAndTitle1_12_2(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        if (!(cr instanceof final JsonNBTComponentRewriter<CU> jcr)) return;
+        ctx.clientbound(ClientboundPackets1_12_1.PLAYER_COMBAT, jcr::registerPlayerCombat);
+        ctx.clientbound(ClientboundPackets1_12_1.SET_TITLES, jcr::registerTitle);
+    }
+
+    private static <CU extends ClientboundPacketType> void registerComponentsFrom1_12_2(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        // not including set_score, player_info, update_advancements, and open_screen
+        ctx.clientbound(ClientboundPackets1_12_1.BOSS_EVENT, cr::registerBossEvent);
+        ctx.clientbound(ClientboundPackets1_12_1.DISCONNECT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_12_1.TAB_LIST, cr::registerTabList);
+        cr.registerLoginDisconnect();
+    }
+
+    static <CU extends ClientboundPacketType> void registerActionBarTitleSubtitle1_17_1(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        ctx.clientbound(ClientboundPackets1_17_1.SET_ACTION_BAR_TEXT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_17_1.SET_TITLE_TEXT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_17_1.SET_SUBTITLE_TEXT, cr::registerComponentPacket);
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_20_5(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        common1_20_5(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+        ctx.clientbound(ClientboundPackets1_20_5.DISGUISED_CHAT, cr::registerComponentPacket);
+        if (cr instanceof final JsonNBTComponentRewriter<CU> jcr) {
+            ctx.clientbound(ClientboundPackets1_20_5.PLAYER_CHAT, cu -> jcr.registerPlayerChat(cu, Types.VAR_INT));
+            ctx.clientbound(ClientboundPackets1_20_5.PLAYER_INFO_UPDATE, jcr::registerPlayerInfoUpdate1_20_3);
+        }
+    }
+
+    private static <CU extends ClientboundPacketType> void common1_20_5(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        ctx.clientbound(ClientboundConfigurationPackets1_20_5.DISCONNECT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_5.DISCONNECT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_ACTION_BAR_TEXT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_TITLE_TEXT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_SUBTITLE_TEXT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_5.BOSS_EVENT, cr::registerBossEvent);
+        ctx.clientbound(ClientboundPackets1_20_5.TAB_LIST, cr::registerTabList);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_OBJECTIVE, cr::registerSetObjective);
+        ctx.clientbound(ClientboundPackets1_20_5.SET_SCORE, cr::registerSetScore1_20_3);
+        ctx.clientbound(ClientboundPackets1_20_5.SYSTEM_CHAT, cr::registerComponentPacket);
+        ctx.clientbound(ClientboundPackets1_20_5.PLAYER_COMBAT_KILL, cr::registerPlayerCombatKill1_20);
+        ctx.clientbound(ClientboundPackets1_20_5.SERVER_DATA, cr::registerComponentPacket);
+        cr.registerLoginDisconnect();
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_21(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        common1_20_5(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_21.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+        ctx.clientbound(ClientboundPackets1_21.DISGUISED_CHAT, cr::registerDisguisedChat);
+        if (cr instanceof final JsonNBTComponentRewriter<CU> jcr) {
+            ctx.clientbound(ClientboundPackets1_21.PLAYER_CHAT, cu -> jcr.registerPlayerChat(cu, ChatType.TYPE));
+            ctx.clientbound(ClientboundPackets1_21.PLAYER_INFO_UPDATE, jcr::registerPlayerInfoUpdate1_20_3);
+        }
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_21_4(final RegistrationContext<CU, ?> ctx, final ComponentRewriterBase<CU> cr) {
+        common1_20_5(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_21_2.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_13);
+        ctx.clientbound(ClientboundPackets1_21_2.DISGUISED_CHAT, cr::registerDisguisedChat);
+        ctx.clientbound(ClientboundPackets1_21_2.PLAYER_INFO_UPDATE, cr::registerPlayerInfoUpdate1_21_4);
+        if (cr instanceof final JsonNBTComponentRewriter<CU> jcr) {
+            ctx.clientbound(ClientboundPackets1_21_2.PLAYER_CHAT, cu -> jcr.registerPlayerChat(cu, ChatType.TYPE));
+        }
+    }
+
+    static <CU extends ClientboundPacketType> void registerComponents1_21_5(final RegistrationContext<CU, ?> ctx, final NBTComponentRewriter<CU> cr) {
+        common1_20_5(ctx, cr);
+        ctx.clientbound(ClientboundPackets1_21_5.SET_PLAYER_TEAM, cr::registerSetPlayerTeam1_21_5);
+        ctx.clientbound(ClientboundPackets1_21_5.DISGUISED_CHAT, cr::registerDisguisedChat);
+        ctx.clientbound(ClientboundPackets1_21_5.PLAYER_INFO_UPDATE, cr::registerPlayerInfoUpdate1_21_4);
+        ctx.clientbound(ClientboundPackets1_21_5.PLAYER_CHAT, cr::registerPlayerChat1_21_5);
+    }
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> ComponentRewriterBase<CU> text(final RegistrationContext<CU, SU> ctx) {
+        return ctx.protocol().getComponentRewriter();
+    }
+
+
+    static @Nullable <CU extends ClientboundPacketType, SU extends ServerboundPacketType> NBTComponentRewriter<CU> nbtText(final RegistrationContext<CU, SU> ctx) {
+        return (NBTComponentRewriter<CU>) ctx.protocol().getComponentRewriter();
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/template/BlockItemPacketRewriter1_99.java

@@ -1,109 +0,0 @@
-/*
- * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
- * Copyright (C) 2016-2026 ViaVersion and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package com.viaversion.viaversion.protocols.template;
-
-import com.viaversion.nbt.tag.CompoundTag;
-import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;
-import com.viaversion.viaversion.api.minecraft.item.Item;
-import com.viaversion.viaversion.api.type.types.chunk.ChunkType1_21_5;
-import com.viaversion.viaversion.protocols.v1_21_4to1_21_5.rewriter.RecipeDisplayRewriter1_21_5;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPacket1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPackets1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ServerboundPacket1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ServerboundPackets1_21_6;
-import com.viaversion.viaversion.rewriter.BlockRewriter;
-import com.viaversion.viaversion.rewriter.RecipeDisplayRewriter;
-import com.viaversion.viaversion.rewriter.StructuredItemRewriter;
-import com.viaversion.viaversion.rewriter.block.BlockRewriter1_21_5;
-
-// To replace if needed:
-//   ChunkType1_21_5
-//   RecipeDisplayRewriter
-//   Types1_21_4, Types1_OLD
-final class BlockItemPacketRewriter1_99 extends StructuredItemRewriter<ClientboundPacket1_21_6, ServerboundPacket1_21_6, Protocol1_98To1_99> {
-
-    public BlockItemPacketRewriter1_99(final Protocol1_98To1_99 protocol) {
-        super(protocol);
-    }
-
-    @Override
-    public void registerPackets() {
-        // Register block and block state id changes
-        // Other places using block state id mappings: Spawn particle, entity data, entity spawn (falling blocks)
-        // Tags and statistics use block (!) ids
-        final BlockRewriter<ClientboundPacket1_21_6> blockRewriter = new BlockRewriter1_21_5<>(protocol);
-        blockRewriter.registerBlockEvent(ClientboundPackets1_21_6.BLOCK_EVENT);
-        blockRewriter.registerBlockUpdate(ClientboundPackets1_21_6.BLOCK_UPDATE);
-        blockRewriter.registerSectionBlocksUpdate1_20(ClientboundPackets1_21_6.SECTION_BLOCKS_UPDATE);
-        blockRewriter.registerLevelEvent1_21(ClientboundPackets1_21_6.LEVEL_EVENT, 2001);
-        blockRewriter.registerLevelChunk1_19(ClientboundPackets1_21_6.LEVEL_CHUNK_WITH_LIGHT, ChunkType1_21_5::new);
-        blockRewriter.registerBlockEntityData(ClientboundPackets1_21_6.BLOCK_ENTITY_DATA);
-
-        // Registers item id changes
-        // Other places using item ids are: Entity data, tags, statistics, effect
-        // registerOpenScreen(ClientboundPackets1_21_6.OPEN_SCREEN); If a new container type was added; also remove from the component rewriter registration
-        registerSetCursorItem(ClientboundPackets1_21_6.SET_CURSOR_ITEM);
-        registerSetPlayerInventory(ClientboundPackets1_21_6.SET_PLAYER_INVENTORY);
-        registerCooldown1_21_2(ClientboundPackets1_21_6.COOLDOWN);
-        registerSetContent1_21_2(ClientboundPackets1_21_6.CONTAINER_SET_CONTENT);
-        registerSetSlot1_21_2(ClientboundPackets1_21_6.CONTAINER_SET_SLOT);
-        registerAdvancements1_20_3(ClientboundPackets1_21_6.UPDATE_ADVANCEMENTS);
-        registerSetEquipment(ClientboundPackets1_21_6.SET_EQUIPMENT);
-        registerMerchantOffers1_20_5(ClientboundPackets1_21_6.MERCHANT_OFFERS);
-        registerContainerClick1_21_5(ServerboundPackets1_21_6.CONTAINER_CLICK);
-        registerSetCreativeModeSlot1_21_5(ServerboundPackets1_21_6.SET_CREATIVE_MODE_SLOT);
-
-        final RecipeDisplayRewriter<ClientboundPacket1_21_6> recipeRewriter = new RecipeDisplayRewriter1_21_5<>(protocol);
-        recipeRewriter.registerUpdateRecipes(ClientboundPackets1_21_6.UPDATE_RECIPES);
-        recipeRewriter.registerRecipeBookAdd(ClientboundPackets1_21_6.RECIPE_BOOK_ADD);
-        recipeRewriter.registerPlaceGhostRecipe(ClientboundPackets1_21_6.PLACE_GHOST_RECIPE);
-        // OR do this if serialization of recipes changed and override the relevant method
-        // Add new serializers to RecipeDisplayRewriter, or extend the last one for changes
-    }
-
-    @Override
-    protected void backupInconvertibleData(final UserConnection connection, final Item item, final StructuredDataContainer dataContainer, final CompoundTag backupTag) {
-        super.backupInconvertibleData(connection, item, dataContainer, backupTag);
-        // back up any data if needed here, called before the method below
-    }
-
-    @Override
-    protected void handleItemDataComponentsToClient(final UserConnection connection, final Item item, final StructuredDataContainer container) {
-        upgradeData(item, container);
-        super.handleItemDataComponentsToClient(connection, item, container);
-    }
-
-    public static void upgradeData(final Item item, final StructuredDataContainer container) { // public for VB
-    }
-
-    @Override
-    protected void handleItemDataComponentsToServer(final UserConnection connection, final Item item, final StructuredDataContainer container) {
-        downgradeData(item, container);
-        super.handleItemDataComponentsToServer(connection, item, container);
-    }
-
-    public static void downgradeData(final Item item, final StructuredDataContainer container) {
-    }
-
-    @Override
-    protected void restoreBackupData(final Item item, final StructuredDataContainer container, final CompoundTag customData) {
-        super.restoreBackupData(item, container, customData);
-        // restore any data if needed here
-    }
-}

common/src/main/java/com/viaversion/viaversion/protocols/template/BlockItemPacketRewriter99_1.java

@@ -0,0 +1,73 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2026 ViaVersion and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package com.viaversion.viaversion.protocols.template;
+
+import com.viaversion.nbt.tag.CompoundTag;
+import com.viaversion.viaversion.api.connection.UserConnection;
+import com.viaversion.viaversion.api.minecraft.data.StructuredDataContainer;
+import com.viaversion.viaversion.api.minecraft.item.Item;
+import com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;
+import com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ServerboundPacket1_21_9;
+import com.viaversion.viaversion.rewriter.StructuredItemRewriter;
+
+// To replace if needed:
+//   RecipeDisplayRewriter
+final class BlockItemPacketRewriter99_1 extends StructuredItemRewriter<ClientboundPacket26_1, ServerboundPacket1_21_9, Protocol98_1To99_1> {
+
+    public BlockItemPacketRewriter99_1(final Protocol98_1To99_1 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    public void registerPackets() {
+        // Common block, item, recipe, and entity registrations are handled by SharedRegistrations
+
+        // registerOpenScreen(ClientboundPackets26_1.OPEN_SCREEN); If a new container type was added; also remove from the component rewriter registration
+        // OR add new serializers to RecipeDisplayRewriter, or extend the last one for changes
+    }
+
+    @Override
+    protected void backupInconvertibleData(final UserConnection connection, final Item item, final StructuredDataContainer dataContainer, final CompoundTag backupTag) {
+        super.backupInconvertibleData(connection, item, dataContainer, backupTag);
+        // back up any data if needed here, called before the method below
+    }
+
+    @Override
+    protected void handleItemDataComponentsToClient(final UserConnection connection, final Item item, final StructuredDataContainer container) {
+        upgradeData(item, container);
+        super.handleItemDataComponentsToClient(connection, item, container);
+    }
+
+    public static void upgradeData(final Item item, final StructuredDataContainer container) { // public for VB
+    }
+
+    @Override
+    protected void handleItemDataComponentsToServer(final UserConnection connection, final Item item, final StructuredDataContainer container) {
+        downgradeData(item, container);
+        super.handleItemDataComponentsToServer(connection, item, container);
+    }
+
+    public static void downgradeData(final Item item, final StructuredDataContainer container) {
+    }
+
+    @Override
+    protected void restoreBackupData(final Item item, final StructuredDataContainer container, final CompoundTag customData) {
+        super.restoreBackupData(item, container, customData);
+        // restore any data if needed here
+    }
+}

common/src/main/java/com/viaversion/viaversion/protocols/template/ComponentRewriter99_1.java

@@ -19,12 +19,12 @@ package com.viaversion.viaversion.protocols.template;
 
 import com.viaversion.nbt.tag.CompoundTag;
 import com.viaversion.viaversion.api.connection.UserConnection;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPacket1_21_6;
+import com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;
 import com.viaversion.viaversion.rewriter.text.NBTComponentRewriter;
 
-final class ComponentRewriter1_99 extends NBTComponentRewriter<ClientboundPacket1_21_6> {
+final class ComponentRewriter99_1 extends NBTComponentRewriter<ClientboundPacket26_1> {
 
-    public ComponentRewriter1_99(final Protocol1_98To1_99 protocol) {
+    public ComponentRewriter99_1(final Protocol98_1To99_1 protocol) {
         super(protocol);
     }
 

common/src/main/java/com/viaversion/viaversion/protocols/template/EntityPacketRewriter99_1.java

@@ -18,36 +18,29 @@
 package com.viaversion.viaversion.protocols.template;
 
 import com.viaversion.viaversion.api.minecraft.entities.EntityType;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_9;
-import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_21_9;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPacket1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPackets1_21_6;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_11;
+import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes26_1;
+import com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;
 import com.viaversion.viaversion.rewriter.EntityRewriter;
 
 // Replace if needed
 //  VersionedTypes
-//  EntityTypes1_21_9
-final class EntityPacketRewriter1_99 extends EntityRewriter<ClientboundPacket1_21_6, Protocol1_98To1_99> {
+//  EntityTypes1_21_11
+final class EntityPacketRewriter99_1 extends EntityRewriter<ClientboundPacket26_1, Protocol98_1To99_1> {
 
-    public EntityPacketRewriter1_99(final Protocol1_98To1_99 protocol) {
+    public EntityPacketRewriter99_1(final Protocol98_1To99_1 protocol) {
         super(protocol);
     }
 
     @Override
     public void registerPackets() {
-        // Tracks entities, applies entity data rewrites registered below, untracks entities
-        registerTrackerWithData1_21_9(ClientboundPackets1_21_6.ADD_ENTITY, EntityTypes1_21_9.FALLING_BLOCK);
-        registerSetEntityData(ClientboundPackets1_21_6.SET_ENTITY_DATA);
-        registerRemoveEntities(ClientboundPackets1_21_6.REMOVE_ENTITIES);
-        registerPlayerAbilities(ClientboundPackets1_21_6.PLAYER_ABILITIES);
-        registerGameEvent(ClientboundPackets1_21_6.GAME_EVENT);
-        registerLogin1_20_5(ClientboundPackets1_21_6.LOGIN);
-        registerRespawn1_20_5(ClientboundPackets1_21_6.RESPAWN);
+        // Common entity registrations (SET_ENTITY_DATA, REMOVE_ENTITIES, PLAYER_ABILITIES,
+        // GAME_EVENT, LOGIN, RESPAWN) are handled by SharedRegistrations.
     }
 
     @Override
     protected void registerRewrites() {
-        final EntityDataTypes1_21_9 entityDataTypes = protocol.mappedTypes().entityDataTypes();
+        final EntityDataTypes26_1 entityDataTypes = protocol.mappedTypes().entityDataTypes();
         filter().mapDataType(entityDataTypes::byId);
         /* ... or something this if entity data classes changed
         filter().mapDataType(typeId -> {
@@ -70,14 +63,8 @@ final class EntityPacketRewriter1_99 extends EntityRewriter<ClientboundPacket1_2
         );
     }
 
-    @Override
-    public void onMappingDataLoaded() {
-        // IF ENTITY TYPES CHANGED: Automatically map entity id changes AFTER entity ids have been loaded
-        mapTypes();
-    }
-
     @Override
     public EntityType typeFromId(final int type) {
-        return EntityTypes1_21_9.getTypeFromId(type);
+        return EntityTypes1_21_11.getTypeFromId(type);
     }
 }

common/src/main/java/com/viaversion/viaversion/protocols/template/Protocol98_1To99_1.java

@@ -20,92 +20,62 @@ package com.viaversion.viaversion.protocols.template;
 import com.viaversion.viaversion.api.connection.UserConnection;
 import com.viaversion.viaversion.api.data.MappingData;
 import com.viaversion.viaversion.api.data.MappingDataBase;
-import com.viaversion.viaversion.api.minecraft.data.version.StructuredDataKeys1_21_5;
-import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_9;
-import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes1_21_9;
-import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.api.minecraft.data.version.StructuredDataKeys1_21_11;
+import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_21_11;
+import com.viaversion.viaversion.api.minecraft.entitydata.types.EntityDataTypes26_1;
 import com.viaversion.viaversion.api.protocol.packet.provider.PacketTypesProvider;
 import com.viaversion.viaversion.api.protocol.packet.provider.SimplePacketTypesProvider;
+import com.viaversion.viaversion.api.type.types.chunk.ChunkType26_1;
 import com.viaversion.viaversion.api.type.types.version.Types1_20_5;
 import com.viaversion.viaversion.api.type.types.version.VersionedTypes;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
 import com.viaversion.viaversion.data.item.ItemHasherBase;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundConfigurationPackets1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPacket1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ClientboundPackets1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ServerboundConfigurationPackets1_21_6;
-import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ServerboundPacket1_21_6;
+import com.viaversion.viaversion.api.protocol.AbstractProtocol;
+import com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPacket26_1;
+import com.viaversion.viaversion.protocols.v1_21_11to26_1.packet.ClientboundPackets26_1;
 import com.viaversion.viaversion.protocols.v1_21_5to1_21_6.packet.ServerboundPackets1_21_6;
-import com.viaversion.viaversion.rewriter.AttributeRewriter;
+import com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ClientboundConfigurationPackets1_21_9;
+import com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ServerboundConfigurationPackets1_21_9;
+import com.viaversion.viaversion.protocols.v1_21_7to1_21_9.packet.ServerboundPacket1_21_9;
+import com.viaversion.viaversion.rewriter.BlockRewriter;
 import com.viaversion.viaversion.rewriter.ParticleRewriter;
 import com.viaversion.viaversion.rewriter.RegistryDataRewriter;
-import com.viaversion.viaversion.rewriter.SoundRewriter;
-import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
+import com.viaversion.viaversion.rewriter.block.BlockRewriter1_21_5;
 import com.viaversion.viaversion.rewriter.text.NBTComponentRewriter;
 
 import static com.viaversion.viaversion.util.ProtocolUtil.packetTypeMap;
 
 // Placeholders to replace (in the entire package):
-//   Protocol1_98To1_99, EntityPacketRewriter1_99, BlockItemPacketRewriter1_99 - move the latter two to a rewriter package
-//   ClientboundPacket1_21_6
-//   ServerboundPacket1_21_6
-//   EntityTypes1_21_9 (MAPPED type)
-//   VersionedTypes.V1_21_9
-//   1.99, 1.98
-final class Protocol1_98To1_99 extends AbstractProtocol<ClientboundPacket1_21_6, ClientboundPacket1_21_6, ServerboundPacket1_21_6, ServerboundPacket1_21_6> {
+//   ClientboundPacket26_1
+//   ServerboundPacket1_21_9
+//   EntityDataTypes26_1 (MAPPED type)
+//   VersionedTypes.V26_1
+//   ChunkType26_1::new
+//   98.1, 99.1
+final class Protocol98_1To99_1 extends AbstractProtocol<ClientboundPacket26_1, ClientboundPacket26_1, ServerboundPacket1_21_9, ServerboundPacket1_21_9> {
 
-    public static final MappingData MAPPINGS = new MappingDataBase("1.98", "1.99");
-    private final EntityPacketRewriter1_99 entityRewriter = new EntityPacketRewriter1_99(this);
-    private final BlockItemPacketRewriter1_99 itemRewriter = new BlockItemPacketRewriter1_99(this);
-    private final ParticleRewriter<ClientboundPacket1_21_6> particleRewriter = new ParticleRewriter<>(this);
-    private final TagRewriter<ClientboundPacket1_21_6> tagRewriter = new TagRewriter<>(this);
-    private final NBTComponentRewriter<ClientboundPacket1_21_6> componentRewriter = new ComponentRewriter1_99(this);
+    public static final MappingData MAPPINGS = new MappingDataBase("98.1", "99.1");
+    private final EntityPacketRewriter99_1 entityRewriter = new EntityPacketRewriter99_1(this);
+    private final BlockItemPacketRewriter99_1 itemRewriter = new BlockItemPacketRewriter99_1(this);
+    private final BlockRewriter<ClientboundPacket26_1> blockRewriter = new BlockRewriter1_21_5<>(this, ChunkType26_1::new);
+    private final ParticleRewriter<ClientboundPacket26_1> particleRewriter = new ParticleRewriter<>(this);
+    private final TagRewriter<ClientboundPacket26_1> tagRewriter = new TagRewriter<>(this);
+    private final NBTComponentRewriter<ClientboundPacket26_1> componentRewriter = new ComponentRewriter99_1(this);
     private final RegistryDataRewriter registryDataRewriter = new RegistryDataRewriter(this);
 
-    public Protocol1_98To1_99() {
+    public Protocol98_1To99_1() {
         // Passing the class types into the super constructor is needed for automatic packet type id remapping, but can otherwise be omitted
-        super(ClientboundPacket1_21_6.class, ClientboundPacket1_21_6.class, ServerboundPacket1_21_6.class, ServerboundPacket1_21_6.class);
+        super(ClientboundPacket26_1.class, ClientboundPacket26_1.class, ServerboundPacket1_21_9.class, ServerboundPacket1_21_9.class);
     }
 
     @Override
     protected void registerPackets() {
         super.registerPackets();
 
-        registerClientbound(ClientboundConfigurationPackets1_21_6.REGISTRY_DATA, registryDataRewriter::handle);
-
-        tagRewriter.registerGeneric(ClientboundPackets1_21_6.UPDATE_TAGS);
-        tagRewriter.registerGeneric(ClientboundConfigurationPackets1_21_6.UPDATE_TAGS);
-
-        // If needed for item or component changes
-        componentRewriter.registerOpenScreen1_14(ClientboundPackets1_21_6.OPEN_SCREEN);
-        componentRewriter.registerComponentPacket(ClientboundPackets1_21_6.SET_ACTION_BAR_TEXT);
-        componentRewriter.registerComponentPacket(ClientboundPackets1_21_6.SET_TITLE_TEXT);
-        componentRewriter.registerComponentPacket(ClientboundPackets1_21_6.SET_SUBTITLE_TEXT);
-        componentRewriter.registerBossEvent(ClientboundPackets1_21_6.BOSS_EVENT);
-        componentRewriter.registerComponentPacket(ClientboundPackets1_21_6.DISCONNECT);
-        componentRewriter.registerComponentPacket(ClientboundConfigurationPackets1_21_6.DISCONNECT);
-        componentRewriter.registerTabList(ClientboundPackets1_21_6.TAB_LIST);
-        componentRewriter.registerSetPlayerTeam1_21_5(ClientboundPackets1_21_6.SET_PLAYER_TEAM);
-        componentRewriter.registerPlayerCombatKill1_20(ClientboundPackets1_21_6.PLAYER_COMBAT_KILL);
-        componentRewriter.registerPlayerInfoUpdate1_21_4(ClientboundPackets1_21_6.PLAYER_INFO_UPDATE);
-        componentRewriter.registerComponentPacket(ClientboundPackets1_21_6.SYSTEM_CHAT);
-        componentRewriter.registerDisguisedChat(ClientboundPackets1_21_6.DISGUISED_CHAT);
-        componentRewriter.registerPlayerChat1_21_5(ClientboundPackets1_21_6.PLAYER_CHAT);
-        componentRewriter.registerSetObjective(ClientboundPackets1_21_6.SET_OBJECTIVE);
-        componentRewriter.registerSetScore1_20_3(ClientboundPackets1_21_6.SET_SCORE);
-        componentRewriter.registerPing();
-
-        // If needed for any particle, item, or block changes. Extend ParticleRewriter for particle serializer changes
-        particleRewriter.registerLevelParticles1_21_4(ClientboundPackets1_21_6.LEVEL_PARTICLES);
-        particleRewriter.registerExplode1_21_9(ClientboundPackets1_21_6.EXPLODE); // Rewrites the included sound and particles
-
-        final SoundRewriter<ClientboundPacket1_21_6> soundRewriter = new SoundRewriter<>(this);
-        soundRewriter.registerSound1_19_3(ClientboundPackets1_21_6.SOUND);
-        soundRewriter.registerSound1_19_3(ClientboundPackets1_21_6.SOUND_ENTITY);
-
-        new StatisticsRewriter<>(this).register(ClientboundPackets1_21_6.AWARD_STATS);
-        new AttributeRewriter<>(this).register1_21(ClientboundPackets1_21_6.UPDATE_ATTRIBUTES);
+        // Common registrations (tags, components, particles, sounds, statistics, attributes)
+        // are automatically applied via SharedRegistrations based on the protocol's version range.
+        // Only protocol-specific registrations need to be added here.
 
         // Uncomment if an existing type changed serialization format. Mappings for argument type keys can also be defined in mapping files
         /*new CommandRewriter1_19_4<>(this) {
@@ -118,13 +88,13 @@ final class Protocol1_98To1_99 extends AbstractProtocol<ClientboundPacket1_21_6,
                     super.handleArgument(wrapper, argumentType);
                 }
             }
-        }.registerDeclareCommands1_19(ClientboundPackets1_21_6.COMMANDS);*/
+        }.registerDeclareCommands1_19(ClientboundPackets26_1.COMMANDS);*/
     }
 
     @Override
     protected void onMappingDataLoaded() {
         // Uncomment this if the entity types enum has been newly added specifically for this Protocol
-        // EntityTypes1_21_9.initialize(this);
+        // EntityTypes1_21_11.initialize(this);
 
         // Uncomment if a new particle was added = ids shifted; requires a new Types_ class copied from the last
         /*mappedTypes().particle.filler(this)
@@ -145,7 +115,7 @@ final class Protocol1_98To1_99 extends AbstractProtocol<ClientboundPacket1_21_6,
             .reader("effect", ParticleType.Readers.SPELL)
             .reader("instant_effect", ParticleType.Readers.SPELL)
             .reader("flash", ParticleType.Readers.COLOR)
-            .reader("item", ParticleType.Readers.item(itemRewriter.mappedItemType()));*/
+            .reader("item", ParticleType.Readers.item(itemRewriter.mappedItemTemplateType()));*/
 
         super.onMappingDataLoaded(); // Calls load methods on rewriters. Last in case the rewriters access the above filled data
     }
@@ -153,7 +123,7 @@ final class Protocol1_98To1_99 extends AbstractProtocol<ClientboundPacket1_21_6,
     @Override
     public void init(final UserConnection connection) {
         // Register the entity tracker - used for entity id/entity data rewriting AND for tracking world data sent to the client (then used for chunk data rewriting)
-        addEntityTracker(connection, new EntityTrackerBase(connection, EntityTypes1_21_9.PLAYER));
+        addEntityTracker(connection, new EntityTrackerBase(connection, EntityTypes1_21_11.PLAYER));
         addItemHasher(connection, new ItemHasherBase(this, connection));
     }
 
@@ -165,52 +135,57 @@ final class Protocol1_98To1_99 extends AbstractProtocol<ClientboundPacket1_21_6,
     }
 
     @Override
-    public EntityPacketRewriter1_99 getEntityRewriter() {
+    public EntityPacketRewriter99_1 getEntityRewriter() {
         return entityRewriter;
     }
 
     @Override
-    public BlockItemPacketRewriter1_99 getItemRewriter() {
+    public BlockItemPacketRewriter99_1 getItemRewriter() {
         return itemRewriter;
     }
 
+    @Override
+    public BlockRewriter<ClientboundPacket26_1> getBlockRewriter() {
+        return blockRewriter;
+    }
+
     @Override
     public RegistryDataRewriter getRegistryDataRewriter() {
         return registryDataRewriter;
     }
 
     @Override
-    public ParticleRewriter<ClientboundPacket1_21_6> getParticleRewriter() {
+    public ParticleRewriter<ClientboundPacket26_1> getParticleRewriter() {
         return particleRewriter;
     }
 
     @Override
-    public TagRewriter<ClientboundPacket1_21_6> getTagRewriter() {
+    public TagRewriter<ClientboundPacket26_1> getTagRewriter() {
         return tagRewriter;
     }
 
     @Override
-    public NBTComponentRewriter<ClientboundPacket1_21_6> getComponentRewriter() {
+    public NBTComponentRewriter<ClientboundPacket26_1> getComponentRewriter() {
         return componentRewriter;
     }
 
     @Override
-    public Types1_20_5<StructuredDataKeys1_21_5, EntityDataTypes1_21_9> types() {
-        return VersionedTypes.V1_21_9;
+    public Types1_20_5<StructuredDataKeys1_21_11, EntityDataTypes26_1> types() {
+        return VersionedTypes.V26_1;
     }
 
     @Override
-    public Types1_20_5<StructuredDataKeys1_21_5, EntityDataTypes1_21_9> mappedTypes() {
-        return VersionedTypes.V1_21_9;
+    public Types1_20_5<StructuredDataKeys1_21_11, EntityDataTypes26_1> mappedTypes() {
+        return VersionedTypes.V26_1;
     }
 
     @Override
-    protected PacketTypesProvider<ClientboundPacket1_21_6, ClientboundPacket1_21_6, ServerboundPacket1_21_6, ServerboundPacket1_21_6> createPacketTypesProvider() {
+    protected PacketTypesProvider<ClientboundPacket26_1, ClientboundPacket26_1, ServerboundPacket1_21_9, ServerboundPacket1_21_9> createPacketTypesProvider() {
         return new SimplePacketTypesProvider<>(
-            packetTypeMap(unmappedClientboundPacketType, ClientboundPackets1_21_6.class, ClientboundConfigurationPackets1_21_6.class),
-            packetTypeMap(mappedClientboundPacketType, ClientboundPackets1_21_6.class, ClientboundConfigurationPackets1_21_6.class),
-            packetTypeMap(mappedServerboundPacketType, ServerboundPackets1_21_6.class, ServerboundConfigurationPackets1_21_6.class),
-            packetTypeMap(unmappedServerboundPacketType, ServerboundPackets1_21_6.class, ServerboundConfigurationPackets1_21_6.class)
+            packetTypeMap(unmappedClientboundPacketType, ClientboundPackets26_1.class, ClientboundConfigurationPackets1_21_9.class),
+            packetTypeMap(mappedClientboundPacketType, ClientboundPackets26_1.class, ClientboundConfigurationPackets1_21_9.class),
+            packetTypeMap(mappedServerboundPacketType, ServerboundPackets1_21_6.class, ServerboundConfigurationPackets1_21_9.class),
+            packetTypeMap(unmappedServerboundPacketType, ServerboundPackets1_21_6.class, ServerboundConfigurationPackets1_21_9.class)
         );
     }
 }

common/src/main/java/com/viaversion/viaversion/protocols/v1_10to1_11/Protocol1_10To1_11.java

@@ -37,7 +37,6 @@ import com.viaversion.viaversion.protocols.v1_10to1_11.rewriter.ItemPacketRewrit
 import com.viaversion.viaversion.protocols.v1_10to1_11.storage.EntityTracker1_11;
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;
-import com.viaversion.viaversion.rewriter.SoundRewriter;
 
 public class Protocol1_10To1_11 extends AbstractProtocol<ClientboundPackets1_9_3, ClientboundPackets1_9_3, ServerboundPackets1_9_3, ServerboundPackets1_9_3> {
 
@@ -59,7 +58,15 @@ public class Protocol1_10To1_11 extends AbstractProtocol<ClientboundPackets1_9_3
     protected void registerPackets() {
         super.registerPackets();
 
-        new SoundRewriter<>(this, this::getNewSoundId).registerSound(ClientboundPackets1_9_3.SOUND);
+        registerClientbound(ClientboundPackets1_9_3.SOUND, wrapper -> {
+            int soundId = wrapper.read(Types.VAR_INT);
+            int mappedId = getNewSoundId(soundId);
+            if (mappedId == -1) {
+                wrapper.cancel();
+            } else {
+                wrapper.write(Types.VAR_INT, mappedId);
+            }
+        });
 
         registerClientbound(ClientboundPackets1_9_3.SET_TITLES, new PacketHandlers() {
             @Override

common/src/main/java/com/viaversion/viaversion/protocols/v1_11_1to1_12/Protocol1_11_1To1_12.java

@@ -43,7 +43,6 @@ import com.viaversion.viaversion.protocols.v1_11_1to1_12.rewriter.EntityPacketRe
 import com.viaversion.viaversion.protocols.v1_11_1to1_12.rewriter.ItemPacketRewriter1_12;
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ClientboundPackets1_9_3;
 import com.viaversion.viaversion.protocols.v1_9_1to1_9_3.packet.ServerboundPackets1_9_3;
-import com.viaversion.viaversion.rewriter.SoundRewriter;
 
 public class Protocol1_11_1To1_12 extends AbstractProtocol<ClientboundPackets1_9_3, ClientboundPackets1_12, ServerboundPackets1_9_3, ServerboundPackets1_12> {
 
@@ -58,6 +57,16 @@ public class Protocol1_11_1To1_12 extends AbstractProtocol<ClientboundPackets1_9
     protected void registerPackets() {
         super.registerPackets();
 
+        registerClientbound(ClientboundPackets1_9_3.SOUND, wrapper -> {
+            int soundId = wrapper.read(Types.VAR_INT);
+            int mappedId = getNewSoundId(soundId);
+            if (mappedId == -1) {
+                wrapper.cancel();
+            } else {
+                wrapper.write(Types.VAR_INT, mappedId);
+            }
+        });
+
         registerClientbound(ClientboundPackets1_9_3.CHAT, wrapper -> {
             final JsonElement element = wrapper.passthrough(Types.COMPONENT);
             TranslateRewriter.toClient(wrapper.user(), element);
@@ -96,9 +105,6 @@ public class Protocol1_11_1To1_12 extends AbstractProtocol<ClientboundPackets1_9
             }
         });
 
-        new SoundRewriter<>(this, this::getNewSoundId).registerSound(ClientboundPackets1_9_3.SOUND);
-
-
         // New packet at 0x01
         cancelServerbound(ServerboundPackets1_12.CRAFTING_RECIPE_PLACEMENT);
 

common/src/main/java/com/viaversion/viaversion/protocols/v1_12_2to1_13/Protocol1_12_2To1_13.java

@@ -40,7 +40,6 @@ import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.misc.ParticleType;
 import com.viaversion.viaversion.api.type.types.version.Types1_13;
 import com.viaversion.viaversion.data.entity.EntityTrackerBase;
-import com.viaversion.viaversion.protocols.base.ClientboundLoginPackets;
 import com.viaversion.viaversion.protocols.base.ClientboundStatusPackets;
 import com.viaversion.viaversion.protocols.base.ServerboundLoginPackets;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.blockconnections.ConnectionData;
@@ -181,10 +180,6 @@ public class Protocol1_12_2To1_13 extends AbstractProtocol<ClientboundPackets1_1
 
         WorldPacketRewriter1_13.register(this);
 
-        registerClientbound(State.LOGIN, ClientboundLoginPackets.LOGIN_DISCONNECT, wrapper -> {
-            componentRewriter.processText(wrapper.user(), wrapper.passthrough(Types.COMPONENT));
-        });
-
         registerClientbound(State.STATUS, ClientboundStatusPackets.STATUS_RESPONSE, new PacketHandlers() {
             @Override
             public void register() {
@@ -253,9 +248,6 @@ public class Protocol1_12_2To1_13 extends AbstractProtocol<ClientboundPackets1_1
         });
 
 
-        componentRewriter.registerBossEvent(ClientboundPackets1_12_1.BOSS_EVENT);
-        componentRewriter.registerComponentPacket(ClientboundPackets1_12_1.CHAT);
-
         registerClientbound(ClientboundPackets1_12_1.COMMAND_SUGGESTIONS, wrapper -> {
             wrapper.write(Types.VAR_INT, wrapper.user().get(TabCompleteTracker.class).getTransactionId());
 
@@ -329,8 +321,6 @@ public class Protocol1_12_2To1_13 extends AbstractProtocol<ClientboundPackets1_1
             }
         });
 
-        componentRewriter.registerComponentPacket(ClientboundPackets1_12_1.DISCONNECT);
-
         registerClientbound(ClientboundPackets1_12_1.LEVEL_EVENT, new PacketHandlers() {
             @Override
             public void register() {
@@ -359,8 +349,6 @@ public class Protocol1_12_2To1_13 extends AbstractProtocol<ClientboundPackets1_1
             }
         });
 
-        componentRewriter.registerPlayerCombat(ClientboundPackets1_12_1.PLAYER_COMBAT);
-
         registerClientbound(ClientboundPackets1_12_1.MAP_ITEM_DATA, new PacketHandlers() {
             @Override
             public void register() {
@@ -510,17 +498,6 @@ public class Protocol1_12_2To1_13 extends AbstractProtocol<ClientboundPackets1_1
             }
         });
 
-        componentRewriter.registerTitle(ClientboundPackets1_12_1.SET_TITLES);
-
-        // New 0x4C - Stop Sound
-
-        new SoundRewriter<>(this).registerSound(ClientboundPackets1_12_1.SOUND);
-
-        registerClientbound(ClientboundPackets1_12_1.TAB_LIST, wrapper -> {
-            componentRewriter.processText(wrapper.user(), wrapper.passthrough(Types.COMPONENT));
-            componentRewriter.processText(wrapper.user(), wrapper.passthrough(Types.COMPONENT));
-        });
-
         registerClientbound(ClientboundPackets1_12_1.UPDATE_ADVANCEMENTS, wrapper -> {
             wrapper.passthrough(Types.BOOLEAN); // Reset/clear
             int size = wrapper.passthrough(Types.VAR_INT); // Mapping size

common/src/main/java/com/viaversion/viaversion/protocols/v1_12_2to1_13/rewriter/EntityPacketRewriter1_13.java

@@ -30,6 +30,7 @@ import com.viaversion.viaversion.protocols.v1_12_2to1_13.Protocol1_12_2To1_13;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.blockconnections.ConnectionData;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.data.EntityIdMappings1_13;
 import com.viaversion.viaversion.protocols.v1_12_2to1_13.data.ParticleIdMappings1_13;
+import com.viaversion.viaversion.protocols.v1_12_2to1_13.storage.BlockStorage;
 import com.viaversion.viaversion.protocols.v1_12to1_12_1.packet.ClientboundPackets1_12_1;
 import com.viaversion.viaversion.rewriter.EntityRewriter;
 import com.viaversion.viaversion.util.ComponentUtil;
@@ -153,6 +154,7 @@ public class EntityPacketRewriter1_13 extends EntityRewriter<ClientboundPackets1
                             ConnectionData.clearBlockStorage(wrapper.user());
                         }
                         tracker(wrapper.user()).clearEntities();
+                        wrapper.user().get(BlockStorage.class).clear();
                     }
                 });
                 handler(Protocol1_12_2To1_13.SEND_DECLARE_COMMANDS_AND_TAGS);

common/src/main/java/com/viaversion/viaversion/protocols/v1_12_2to1_13/rewriter/WorldPacketRewriter1_13.java

@@ -302,13 +302,15 @@ public class WorldPacketRewriter1_13 {
         protocol.registerClientbound(ClientboundPackets1_12_1.FORGET_LEVEL_CHUNK, new PacketHandlers() {
             @Override
             public void register() {
-                if (Via.getConfig().isServersideBlockConnections()) {
-                    handler(wrapper -> {
-                        int x = wrapper.passthrough(Types.INT);
-                        int z = wrapper.passthrough(Types.INT);
+                handler(wrapper -> {
+                    int x = wrapper.passthrough(Types.INT);
+                    int z = wrapper.passthrough(Types.INT);
+
+                    wrapper.user().get(BlockStorage.class).removeChunk(x, z);
+                    if (Via.getConfig().isServersideBlockConnections()) {
                         ConnectionData.blockConnectionProvider.unloadChunk(wrapper.user(), x, z);
-                    });
-                }
+                    }
+                });
             }
         });
 

common/src/main/java/com/viaversion/viaversion/protocols/v1_12_2to1_13/storage/BlockStorage.java

@@ -19,15 +19,15 @@ package com.viaversion.viaversion.protocols.v1_12_2to1_13.storage;
 
 import com.viaversion.viaversion.api.connection.StorableObject;
 import com.viaversion.viaversion.api.minecraft.BlockPosition;
+import com.viaversion.viaversion.api.minecraft.ChunkPosition;
 import it.unimi.dsi.fastutil.ints.IntOpenHashSet;
 import it.unimi.dsi.fastutil.ints.IntSet;
 import java.util.HashMap;
 import java.util.Map;
 
-// TODO Fix memory leak lolz (only a smol one tho)
 public class BlockStorage implements StorableObject {
     private static final IntSet WHITELIST = new IntOpenHashSet(46);
-    private final Map<BlockPosition, ReplacementData> blocks = new HashMap<>();
+    private final Map<Long, Map<BlockPosition, ReplacementData>> blocks = new HashMap<>();
 
     static {
         // Flower pots
@@ -62,7 +62,8 @@ public class BlockStorage implements StorableObject {
         if (!WHITELIST.contains(block))
             return;
 
-        blocks.put(position, new ReplacementData(block, replacementId));
+        final long chunkKey = ChunkPosition.chunkKeyForBlock(position.x(), position.z());
+        blocks.computeIfAbsent(chunkKey, key -> new HashMap<>()).put(position, new ReplacementData(block, replacementId));
     }
 
     public boolean isWelcome(int block) {
@@ -70,15 +71,35 @@ public class BlockStorage implements StorableObject {
     }
 
     public boolean contains(BlockPosition position) {
-        return blocks.containsKey(position);
+        final Map<BlockPosition, ReplacementData> chunkBlocks = blocks.get(ChunkPosition.chunkKeyForBlock(position.x(), position.z()));
+        return chunkBlocks != null && chunkBlocks.containsKey(position);
     }
 
     public ReplacementData get(BlockPosition position) {
-        return blocks.get(position);
+        final Map<BlockPosition, ReplacementData> chunkBlocks = blocks.get(ChunkPosition.chunkKeyForBlock(position.x(), position.z()));
+        return chunkBlocks != null ? chunkBlocks.get(position) : null;
     }
 
     public ReplacementData remove(BlockPosition position) {
-        return blocks.remove(position);
+        final long chunkKey = ChunkPosition.chunkKeyForBlock(position.x(), position.z());
+        final Map<BlockPosition, ReplacementData> chunkBlocks = blocks.get(chunkKey);
+        if (chunkBlocks == null) {
+            return null;
+        }
+
+        final ReplacementData removed = chunkBlocks.remove(position);
+        if (chunkBlocks.isEmpty()) {
+            blocks.remove(chunkKey);
+        }
+        return removed;
+    }
+
+    public void removeChunk(int chunkX, int chunkZ) {
+        blocks.remove(ChunkPosition.chunkKey(chunkX, chunkZ));
+    }
+
+    public void clear() {
+        blocks.clear();
     }
 
     public static final class ReplacementData {

common/src/main/java/com/viaversion/viaversion/protocols/v1_13_2to1_14/Protocol1_13_2To1_14.java

@@ -23,7 +23,6 @@ import com.viaversion.viaversion.api.minecraft.RegistryType;
 import com.viaversion.viaversion.api.minecraft.entities.EntityTypes1_14;
 import com.viaversion.viaversion.api.protocol.AbstractProtocol;
 import com.viaversion.viaversion.api.protocol.remapper.PacketHandlers;
-import com.viaversion.viaversion.api.type.Types;
 import com.viaversion.viaversion.api.type.types.misc.ParticleType;
 import com.viaversion.viaversion.api.type.types.version.Types1_13_2;
 import com.viaversion.viaversion.api.type.types.version.Types1_14;
@@ -38,10 +37,9 @@ import com.viaversion.viaversion.protocols.v1_13_2to1_14.rewriter.ItemPacketRewr
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.rewriter.PlayerPacketRewriter1_14;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.rewriter.WorldPacketRewriter1_14;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.storage.EntityTracker1_14;
+import com.viaversion.viaversion.rewriter.BlockRewriter;
 import com.viaversion.viaversion.rewriter.CommandRewriter;
 import com.viaversion.viaversion.rewriter.ParticleRewriter;
-import com.viaversion.viaversion.rewriter.SoundRewriter;
-import com.viaversion.viaversion.rewriter.StatisticsRewriter;
 import com.viaversion.viaversion.rewriter.TagRewriter;
 import com.viaversion.viaversion.rewriter.text.JsonNBTComponentRewriter;
 import com.viaversion.viaversion.util.ProtocolLogger;
@@ -55,6 +53,7 @@ public class Protocol1_13_2To1_14 extends AbstractProtocol<ClientboundPackets1_1
     private final ItemPacketRewriter1_14 itemRewriter = new ItemPacketRewriter1_14(this);
     private final ParticleRewriter<ClientboundPackets1_13> particleRewriter = new ParticleRewriter<>(this);
     private final TagRewriter<ClientboundPackets1_13> tagRewriter = new TagRewriter<>(this);
+    private final BlockRewriter<ClientboundPackets1_13> blockRewriter = BlockRewriter.for1_14(this);
 
     public Protocol1_13_2To1_14() {
         super(ClientboundPackets1_13.class, ClientboundPackets1_14.class, ServerboundPackets1_13.class, ServerboundPackets1_14.class);
@@ -67,11 +66,6 @@ public class Protocol1_13_2To1_14 extends AbstractProtocol<ClientboundPackets1_1
         WorldPacketRewriter1_14.register(this);
         PlayerPacketRewriter1_14.register(this);
 
-        new SoundRewriter<>(this).registerSound(ClientboundPackets1_13.SOUND);
-        new StatisticsRewriter<>(this).register(ClientboundPackets1_13.AWARD_STATS);
-
-        particleRewriter.registerLevelParticles1_13(ClientboundPackets1_13.LEVEL_PARTICLES, Types.FLOAT);
-
         JsonNBTComponentRewriter<ClientboundPackets1_13> componentRewriter = new ComponentRewriter1_14<>(this);
         componentRewriter.registerComponentPacket(ClientboundPackets1_13.CHAT);
 
@@ -109,16 +103,8 @@ public class Protocol1_13_2To1_14 extends AbstractProtocol<ClientboundPackets1_1
         WorldPacketRewriter1_14.caveAir = MAPPINGS.getBlockStateMappings().getNewId(8592);
 
         EntityTypes1_14.initialize(this);
-        Types1_13_2.PARTICLE.filler(this, false)
-            .reader("block", ParticleType.Readers.BLOCK)
-            .reader("dust", ParticleType.Readers.DUST)
-            .reader("falling_dust", ParticleType.Readers.BLOCK)
-            .reader("item", ParticleType.Readers.ITEM1_13_2);
-        Types1_14.PARTICLE.filler(this)
-            .reader("block", ParticleType.Readers.BLOCK)
-            .reader("dust", ParticleType.Readers.DUST)
-            .reader("falling_dust", ParticleType.Readers.BLOCK)
-            .reader("item", ParticleType.Readers.ITEM1_13_2);
+        ParticleType.Fillers.fill1_13_2(this, Types1_13_2.PARTICLE, false);
+        ParticleType.Fillers.fill1_13_2(this, Types1_14.PARTICLE, true);
 
         tagRewriter.addEmptyTag(RegistryType.BLOCK, "bamboo_plantable_on");
 
@@ -151,6 +137,11 @@ public class Protocol1_13_2To1_14 extends AbstractProtocol<ClientboundPackets1_1
         return itemRewriter;
     }
 
+    @Override
+    public BlockRewriter<ClientboundPackets1_13> getBlockRewriter() {
+        return blockRewriter;
+    }
+
     @Override
     public ParticleRewriter<ClientboundPackets1_13> getParticleRewriter() {
         return particleRewriter;

common/src/main/java/com/viaversion/viaversion/protocols/v1_13_2to1_14/rewriter/EntityPacketRewriter1_14.java

@@ -252,7 +252,6 @@ public class EntityPacketRewriter1_14 extends EntityRewriter<ClientboundPackets1
             }
         });
 
-        registerRemoveEntities(ClientboundPackets1_13.REMOVE_ENTITIES);
         registerSetEntityData(ClientboundPackets1_13.SET_ENTITY_DATA, Types1_13_2.ENTITY_DATA_LIST, Types1_14.ENTITY_DATA_LIST);
     }
 
@@ -386,7 +385,7 @@ public class EntityPacketRewriter1_14 extends EntityRewriter<ClientboundPackets1
 
     @Override
     public void onMappingDataLoaded() {
-        mapTypes();
+        super.onMappingDataLoaded();
         if (Via.getConfig().translateOcelotToCat()) {
             // A better solution for this would be to despawn the ocelot and spawn a cat in its place, but that would
             // require a lot of data tracking and is not worth the effort.

common/src/main/java/com/viaversion/viaversion/protocols/v1_13_2to1_14/rewriter/ItemPacketRewriter1_14.java

@@ -64,9 +64,6 @@ public class ItemPacketRewriter1_14 extends ItemRewriter<ClientboundPackets1_13,
 
     @Override
     public void registerPackets() {
-        registerCooldown(ClientboundPackets1_13.COOLDOWN);
-        registerAdvancements(ClientboundPackets1_13.UPDATE_ADVANCEMENTS);
-
         protocol.registerClientbound(ClientboundPackets1_13.OPEN_SCREEN, null, wrapper -> {
             Short windowId = wrapper.read(Types.UNSIGNED_BYTE);
             String type = wrapper.read(Types.STRING);
@@ -112,9 +109,6 @@ public class ItemPacketRewriter1_14 extends ItemRewriter<ClientboundPackets1_13,
             }
         });
 
-        registerSetContent(ClientboundPackets1_13.CONTAINER_SET_CONTENT);
-        registerSetSlot(ClientboundPackets1_13.CONTAINER_SET_SLOT);
-
         protocol.registerClientbound(ClientboundPackets1_13.CUSTOM_PAYLOAD, new PacketHandlers() {
             @Override
             public void register() {
@@ -166,8 +160,6 @@ public class ItemPacketRewriter1_14 extends ItemRewriter<ClientboundPackets1_13,
             }
         });
 
-        registerSetEquippedItem(ClientboundPackets1_13.SET_EQUIPPED_ITEM);
-
         RecipeRewriter<ClientboundPackets1_13> recipeRewriter = new RecipeRewriter<>(protocol);
         protocol.registerClientbound(ClientboundPackets1_13.UPDATE_RECIPES, wrapper -> {
             int size = wrapper.passthrough(Types.VAR_INT);
@@ -188,8 +180,6 @@ public class ItemPacketRewriter1_14 extends ItemRewriter<ClientboundPackets1_13,
         });
 
 
-        registerContainerClick(ServerboundPackets1_14.CONTAINER_CLICK);
-
         protocol.registerServerbound(ServerboundPackets1_14.SELECT_TRADE, wrapper -> {
             // Selecting trade now moves the items, we need to resync the inventory
             PacketWrapper resyncPacket = wrapper.create(ServerboundPackets1_13.CONTAINER_CLICK);
@@ -204,8 +194,6 @@ public class ItemPacketRewriter1_14 extends ItemRewriter<ClientboundPackets1_13,
             resyncPacket.write(Types.ITEM1_13_2, new DataItem(1, (byte) 1, tag)); // 5 - Clicked Item
             resyncPacket.scheduleSendToServer(Protocol1_13_2To1_14.class);
         });
-
-        registerSetCreativeModeSlot(ServerboundPackets1_14.SET_CREATIVE_MODE_SLOT);
     }
 
     @Override

common/src/main/java/com/viaversion/viaversion/protocols/v1_13_2to1_14/rewriter/WorldPacketRewriter1_14.java

@@ -37,7 +37,6 @@ import com.viaversion.viaversion.protocols.v1_12_2to1_13.packet.ClientboundPacke
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.Protocol1_13_2To1_14;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.packet.ClientboundPackets1_14;
 import com.viaversion.viaversion.protocols.v1_13_2to1_14.storage.EntityTracker1_14;
-import com.viaversion.viaversion.rewriter.BlockRewriter;
 import com.viaversion.viaversion.util.CompactArrayUtil;
 import java.util.Arrays;
 
@@ -53,8 +52,6 @@ public class WorldPacketRewriter1_14 {
     }
 
     public static void register(Protocol1_13_2To1_14 protocol) {
-        BlockRewriter<ClientboundPackets1_13> blockRewriter = BlockRewriter.for1_14(protocol);
-
         protocol.registerClientbound(ClientboundPackets1_13.BLOCK_DESTRUCTION, new PacketHandlers() {
             @Override
             public void register() {
@@ -69,7 +66,7 @@ public class WorldPacketRewriter1_14 {
                 map(Types.BLOCK_POSITION1_8, Types.BLOCK_POSITION1_14);
             }
         });
-        protocol.registerClientbound(ClientboundPackets1_13.BLOCK_EVENT, new PacketHandlers() {
+        protocol.replaceClientbound(ClientboundPackets1_13.BLOCK_EVENT, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.BLOCK_POSITION1_8, Types.BLOCK_POSITION1_14); // Location
@@ -79,7 +76,7 @@ public class WorldPacketRewriter1_14 {
                 handler(wrapper -> wrapper.set(Types.VAR_INT, 0, protocol.getMappingData().getNewBlockId(wrapper.get(Types.VAR_INT, 0))));
             }
         });
-        protocol.registerClientbound(ClientboundPackets1_13.BLOCK_UPDATE, new PacketHandlers() {
+        protocol.replaceClientbound(ClientboundPackets1_13.BLOCK_UPDATE, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.BLOCK_POSITION1_8, Types.BLOCK_POSITION1_14);
@@ -102,8 +99,6 @@ public class WorldPacketRewriter1_14 {
             }
         });
 
-        blockRewriter.registerChunkBlocksUpdate(ClientboundPackets1_13.CHUNK_BLOCKS_UPDATE);
-
         protocol.registerClientbound(ClientboundPackets1_13.EXPLODE, new PacketHandlers() {
             @Override
             public void register() {
@@ -247,7 +242,7 @@ public class WorldPacketRewriter1_14 {
             }
         });
 
-        protocol.registerClientbound(ClientboundPackets1_13.LEVEL_EVENT, new PacketHandlers() {
+        protocol.replaceClientbound(ClientboundPackets1_13.LEVEL_EVENT, new PacketHandlers() {
             @Override
             public void register() {
                 map(Types.INT); // Effect Id