Complete all serverbound packets at PLAY state

build.gradle.kts

@@ -5,7 +5,11 @@ plugins {
 
 allprojects {
     group = "cn.rtast.libmc"
-    version = providers.gradleProperty("libVersion").get()
+    val libVersion = getProperty("libVersion")
+    version = when (name) {
+        "protocol" -> "${getProperty("protocolVersion")}-$libVersion"
+        else -> libVersion
+    }
 
     repositories {
         mavenCentral()
@@ -29,4 +33,6 @@ subprojects {
             }
         }
     }
-}
+}
+
+fun getProperty(name: String): String = providers.gradleProperty(name).get()

gradle.properties

@@ -4,4 +4,5 @@ kotlin.native.enableKlibsCrossCompilation=true
 kotlin.daemon.jvmargs=-Xmx2048M
 org.gradle.jvmargs=-Xmx3g -Dfile.encoding=UTF-8
 
-libVersion=0.1.0
+libVersion=0.1.0
+protocolVersion=26.2

libmc-common/src/commonMain/kotlin/cn/rtast/libmc/common/buffer.kt

@@ -56,9 +56,52 @@ public fun BytesBuffer.readUuid(): Uuid {
 public fun BytesBuffer.writeVarInt(value: Int): Unit = VarIntCodec.encode(this, value)
 public fun BytesBuffer.readVarInt(): Int = VarIntCodec.decode(this)
 
+public fun BytesBuffer.writeVarLong(value: Long): Unit = VarLongCodec.encode(this, value)
+public fun BytesBuffer.readVarLong(): Long = VarLongCodec.decode(this)
+
 public fun BytesBuffer.writeMcString(value: String): Unit = McStringCodec.encode(this, value)
 public fun BytesBuffer.readMcString(): String = McStringCodec.decode(this)
 
+public fun BytesBuffer.readPrefixedByteArray(): ByteArray {
+    val length = this.readVarInt()
+    val data = this.readBytes(length)
+    return data
+}
+
+public fun BytesBuffer.writePrefixedByteArray(data: ByteArray) {
+    this.writeVarInt(data.size)
+    this.writeBytes(data)
+}
+
+public fun BytesBuffer.readPrefixedVarIntArray(): List<Int> {
+    val length = readVarInt()
+    val list = ArrayList<Int>(length)
+    repeat(length) { list.add(readVarInt()) }
+    return list
+}
+
+public fun BytesBuffer.writePrefixedVarIntArray(value: List<Int>) {
+    writeVarInt(value.size)
+    for (item in value) writeVarInt(item)
+}
+
+public fun BytesBuffer.readPrefixedStringArray(): List<String> {
+    val length = readVarInt()
+    val list = ArrayList<String>(length)
+    repeat(length) { list.add(readMcString()) }
+    return list
+}
+
+public fun BytesBuffer.writePrefixedStringArray(value: List<String>) {
+    writeVarInt(value.size)
+    for (item in value) writeMcString(item)
+}
+
+public inline fun <T> BytesBuffer.writePrefixedArray(value: List<T>, writeItem: BytesBuffer.(T) -> Unit) {
+    writeVarInt(value.size)
+    for (item in value) writeItem(item)
+}
+
 public fun ReadChannel.readPacketFrame(): BytesBuffer {
     val length = this.readVarInt()
     return this.readBytes(length).wrap()

libmc-common/src/commonMain/kotlin/cn/rtast/libmc/common/mc_primitives.kt

@@ -34,6 +34,34 @@ public object VarIntCodec : PacketCodec<Int> {
     }
 }
 
+public object VarLongCodec : PacketCodec<Long> {
+    override fun encode(buffer: BytesBuffer, value: Long) {
+        var v = value
+        while (true) {
+            if ((v and 0x7FL.inv()) == 0L) {
+                buffer.writeByte(v.toByte())
+                return
+            }
+            buffer.writeByte(((v and 0x7F) or 0x80).toByte())
+            v = v ushr 7
+        }
+    }
+
+    override fun decode(buffer: BytesBuffer): Long {
+        var numRead = 0
+        var result = 0L
+        var read: Byte
+        do {
+            read = buffer.readByte()
+            val value = (read.toLong() and 0x7F)
+            result = result or (value shl (7 * numRead))
+            numRead++
+            if (numRead > 10) throw IllegalArgumentException("VarLong is too big")
+        } while ((read.toInt() and 0x80) != 0)
+        return result
+    }
+}
+
 public object McStringCodec : PacketCodec<String> {
     override fun encode(buffer: BytesBuffer, value: String) {
         val bytes = value.encodeToByteArray()

libmc-nbt/src/commonMain/kotlin/cn/rtast/libmc/nbt/NBTReader.kt

@@ -79,10 +79,7 @@ public fun NBTInput.readRootCompound(): NBTCompound {
 public fun NBTInput.readNetworkCompound(): NBTCompound {
     return when (val type = NBTType.fromId(readByte().toInt() and 0xFF)) {
         NBTType.Compound -> NBTCompound("", readCompoundTag())
-        NBTType.String -> NBTCompound(
+        NBTType.String -> NBTCompound("", NBTTag.CompoundTag(linkedMapOf("text" to NBTTag.StringTag(readStringTag()))))
-            "", NBTTag.CompoundTag(linkedMapOf("text" to NBTTag.StringTag(readStringTag())))
-        )
-
         else -> throw UnsupportedOperationException("Unsupported network nbt tag 0x${type.id.toString(16).uppercase()}")
     }
 }

libmc-nbt/src/commonMain/kotlin/cn/rtast/libmc/nbt/NBTWriter.kt

@@ -62,3 +62,10 @@ public fun NBTOutput.writeRootNBTCompound(name: String = ""): ByteArray {
     writeTagPayload(root)
     return toByteArray()
 }
+
+public fun NBTOutput.writeNetworkCompound(compound: NBTCompound) {
+    val compoundTag = compound.element as? NBTTag.CompoundTag
+        ?: throw IllegalArgumentException("NBTCompound element must be an NBTTag.CompoundTag")
+    writeByte(NBTType.Compound.id)
+    writeTagPayload(compoundTag)
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/block/EnchantmentButton.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.block
+
+public enum class EnchantmentButton(public val id: Int) {
+    TOPMOST(0),
+    MIDDLE(1),
+    BOTTOM(2);
+
+    public companion object {
+        public fun fromID(id: Int): EnchantmentButton =
+            requireNotNull(entries.firstOrNull { it.id == id }) { "Unknown enchantment button id $id" }
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/block/LecternButton.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.block
+
+public enum class LecternButton(public val id: Int) {
+    PREVIOUS_PAGE(1),
+    NEXT_PAGE(2),
+    TAKE_BOOK(3);
+
+    public companion object {
+        public fun fromID(id: Int): LecternButton =
+            requireNotNull(entries.firstOrNull { it.id == id }) { "Unknown lectern button id $id" }
+
+        public fun specificPage(page: Int): Int = 100 + page
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/client/InternalPacketDispatcher.kt

@@ -8,9 +8,41 @@
 package cn.rtast.libmc.protocol.client
 
 import cn.rtast.libmc.common.packet.MinecraftPacket
-import cn.rtast.libmc.protocol.packet.configuration.*
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundConfigurationPacket
-import cn.rtast.libmc.protocol.packet.login.*
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundCookieRequestPacket
-import cn.rtast.libmc.protocol.packet.play.*
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundCustomPayloadPacket
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundDisconnectConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundFinishConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundKeepAliveConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundPingConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.clientbound.ClientboundSelectKnownPacksPacket
+import cn.rtast.libmc.protocol.packet.configuration.serverbound.ServerboundAckFinishConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.serverbound.ServerboundKeepAliveConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.serverbound.ServerboundPongConfigurationPacket
+import cn.rtast.libmc.protocol.packet.configuration.serverbound.ServerboundSelectKnownPacksPacket
+import cn.rtast.libmc.protocol.packet.login.clientbound.ClientboundDisconnectLoginPacket
+import cn.rtast.libmc.protocol.packet.login.clientbound.ClientboundLoginPacket
+import cn.rtast.libmc.protocol.packet.login.clientbound.ClientboundLoginSuccessPacket
+import cn.rtast.libmc.protocol.packet.login.clientbound.ClientboundSetCompressionPacket
+import cn.rtast.libmc.protocol.packet.login.serverbound.ServerboundLoginAcknowledgedPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundAcknowledgeBlockChangePacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundAwardStatisticsPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundBlockDestructionPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundBlockEntityDataPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundDelimiterPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundDisconnectPlayPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundEntityAnimationPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundKeepAlivePlayPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundLoginPlayPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundPingPlayPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundPlayPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundPlayerChatMessagePacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundSpawnEntityPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundStartConfigurationPacket
+import cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundSystemChatMessagePacket
+import cn.rtast.libmc.protocol.packet.play.serverbound.ServerboundConfigurationAcknowledgedPacket
+import cn.rtast.libmc.protocol.packet.play.serverbound.ServerboundKeepAlivePlayPacket
+import cn.rtast.libmc.protocol.packet.play.serverbound.ServerboundPongPlayPacket
 import cn.rtast.libmc.protocol.protocol.state.ProtocolState
 
 internal class InternalPacketDispatcher(private val client: MinecraftClient) {
@@ -90,6 +122,13 @@ internal class InternalPacketDispatcher(private val client: MinecraftClient) {
             }
 
             is ClientboundSystemChatMessagePacket -> {}
+            is ClientboundAcknowledgeBlockChangePacket -> {}
+            is ClientboundAwardStatisticsPacket -> {}
+            is ClientboundBlockDestructionPacket -> {}
+            is ClientboundBlockEntityDataPacket -> {}
+            ClientboundDelimiterPacket -> {}
+            is ClientboundEntityAnimationPacket -> {}
+            is ClientboundSpawnEntityPacket -> {}
         }
     }
 }

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/client/MinecraftClient.kt

@@ -10,9 +10,10 @@ import cn.rtast.libmc.common.LibMCContext
 import cn.rtast.libmc.protocol.event.PacketEventDispatcher
 import cn.rtast.libmc.protocol.network.NetworkChannel
 import cn.rtast.libmc.protocol.packet.handshake.ServerboundHandshakePacket
-import cn.rtast.libmc.protocol.packet.login.ServerboundLoginStartPacket
+import cn.rtast.libmc.protocol.packet.login.serverbound.ServerboundLoginStartPacket
 import cn.rtast.libmc.protocol.protocol.state.HandshakeIntent
 import cn.rtast.libmc.protocol.protocol.state.ProtocolState
+import cn.rtast.libmc.protocol.session.TransactionIdManager
 import cn.rtast.libmc.protocol.util.generateOfflineUuid
 import kotlinx.coroutines.*
 import kotlin.coroutines.CoroutineContext
@@ -35,6 +36,8 @@ public class MinecraftClient internal constructor(
     private val clientJob = SupervisorJob(parentJob)
     private var listenJob: Job? = null
 
+    public val transactionManager: TransactionIdManager = TransactionIdManager()
+
     override val coroutineContext: CoroutineContext
         get() = clientJob + ioDispatcher + CoroutineName("LibMC-MinecraftClient-$username")
 

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.packet.MinecraftPacket
 

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundCookieRequestPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundCustomPayloadPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundDisconnectConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundFinishConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundKeepAliveConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundPingConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/clientbound/ClientboundSelectKnownPacksPacket.kt

@@ -5,12 +5,13 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.readVarInt
 import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.packet.configuration.KnownPacks
 
 public data class ClientboundSelectKnownPacksPacket(val knownPacks: List<KnownPacks>) : ClientboundConfigurationPacket {
     public companion object Codec : PacketCodec<ClientboundSelectKnownPacksPacket> {

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/serverbound/ServerboundAckFinishConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/serverbound/ServerboundCookieResponsePacket.kt

@@ -5,15 +5,13 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.packet.MinecraftPacket
-import cn.rtast.libmc.common.readVarInt
 import cn.rtast.libmc.common.writeVarInt
 import cn.rtast.libmc.protocol.protocol.game.Identifier
-import cn.rtast.libmc.protocol.protocol.game.readIdentifier
 import cn.rtast.libmc.protocol.protocol.game.writeIdentifier
 
 public data class ServerboundCookieResponsePacket(val key: Identifier, val payload: ByteArray?) : MinecraftPacket {
@@ -24,20 +22,11 @@ public data class ServerboundCookieResponsePacket(val key: Identifier, val paylo
                 buffer.writeBoolean(true)
                 buffer.writeVarInt(value.payload.size)
                 buffer.writeBytes(value.payload)
-            } else {
+            } else buffer.writeBoolean(false)
-                buffer.writeBoolean(false)
-            }
         }
 
-        override fun decode(buffer: BytesBuffer): ServerboundCookieResponsePacket {
+        override fun decode(buffer: BytesBuffer): ServerboundCookieResponsePacket =
-            val key = buffer.readIdentifier()
+            throw UnsupportedOperationException()
-            val hasPayload = buffer.readBoolean()
-            val payload = if (hasPayload) {
-                val length = buffer.readVarInt()
-                buffer.readBytes(length)
-            } else null
-            return ServerboundCookieResponsePacket(key, payload)
-        }
     }
 
     override fun equals(other: Any?): Boolean {

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/serverbound/ServerboundKeepAliveConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/serverbound/ServerboundPongConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/configuration/serverbound/ServerboundSelectKnownPacksPacket.kt

@@ -5,13 +5,14 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.configuration
+package cn.rtast.libmc.protocol.packet.configuration.serverbound
 
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.packet.MinecraftPacket
 import cn.rtast.libmc.common.readVarInt
 import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.packet.configuration.KnownPacks
 
 public data class ServerboundSelectKnownPacksPacket(val knownPacks: List<KnownPacks>) : MinecraftPacket {
     public companion object Codec : PacketCodec<ServerboundSelectKnownPacksPacket> {

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/login/clientbound/ClientboundDisconnectLoginPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.login
+package cn.rtast.libmc.protocol.packet.login.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/login/clientbound/ClientboundLoginPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.login
+package cn.rtast.libmc.protocol.packet.login.clientbound
 
 import cn.rtast.libmc.common.packet.MinecraftPacket
 

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/login/clientbound/ClientboundLoginSuccessPacket.kt

@@ -5,12 +5,12 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.login
+package cn.rtast.libmc.protocol.packet.login.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.readUuid
-import cn.rtast.libmc.protocol.profile.GameProfile
+import cn.rtast.libmc.protocol.session.GameProfile
 import kotlin.uuid.Uuid
 
 public data class ClientboundLoginSuccessPacket(val gameProfile: GameProfile, val sessionId: Uuid) :

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/login/clientbound/ClientboundSetCompressionPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.login
+package cn.rtast.libmc.protocol.packet.login.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/login/serverbound/ServerboundLoginAcknowledgedPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.login
+package cn.rtast.libmc.protocol.packet.login.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/login/serverbound/ServerboundLoginStartPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.login
+package cn.rtast.libmc.protocol.packet.login.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/ServerboundChatMessagePacket.kt

@@ -1,34 +0,0 @@
-/*
- * Copyright © 2026 RTAkland
- * Author: RTAkland
- * Date: 2026/9/4
- */
-
-
-package cn.rtast.libmc.protocol.packet.play
-
-import cn.rtast.libmc.common.BytesBuffer
-import cn.rtast.libmc.common.PacketCodec
-import cn.rtast.libmc.common.packet.MinecraftPacket
-import cn.rtast.libmc.common.writeMcString
-import cn.rtast.libmc.common.writeVarInt
-import kotlin.time.Clock
-
-public data class ServerboundChatMessagePacket(
-    val message: String,
-    val timestamp: Long = Clock.System.now().toEpochMilliseconds(),
-    val salt: Long = 0L,
-) : MinecraftPacket {
-    public companion object Codec : PacketCodec<ServerboundChatMessagePacket> {
-        override fun encode(buffer: BytesBuffer, value: ServerboundChatMessagePacket) {
-            buffer.writeMcString(value.message)
-            buffer.writeLong(value.timestamp)
-            buffer.writeLong(value.salt)
-            buffer.writeBoolean(false)  // has signature
-            buffer.writeVarInt(0)  // message count
-            buffer.writeBytes(byteArrayOf(0, 0, 0))
-        }
-
-        override fun decode(buffer: BytesBuffer): ServerboundChatMessagePacket = throw UnsupportedOperationException()
-    }
-}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundAcknowledgeBlockChangePacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.clientbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.readVarInt
+
+/**
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Acknowledge_Block_Change
+ */
+public data class ClientboundAcknowledgeBlockChangePacket(val sequenceId: Int) : ClientboundPlayPacket {
+    public companion object Codec : PacketCodec<ClientboundAcknowledgeBlockChangePacket> {
+        override fun encode(buffer: BytesBuffer, value: ClientboundAcknowledgeBlockChangePacket) {}
+        override fun decode(buffer: BytesBuffer): ClientboundAcknowledgeBlockChangePacket {
+            return ClientboundAcknowledgeBlockChangePacket(buffer.readVarInt())
+        }
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundAwardStatisticsPacket.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.clientbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.readVarInt
+import cn.rtast.libmc.protocol.protocol.game.StatisticsEntry
+
+/**
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Award_Statistics
+ */
+public data class ClientboundAwardStatisticsPacket(val stats: List<StatisticsEntry>) : ClientboundPlayPacket {
+    public companion object Codec : PacketCodec<ClientboundAwardStatisticsPacket> {
+        override fun encode(buffer: BytesBuffer, value: ClientboundAwardStatisticsPacket) {}
+        override fun decode(buffer: BytesBuffer): ClientboundAwardStatisticsPacket {
+            val count = buffer.readVarInt()
+            val stats = List(count) { StatisticsEntry.decode(buffer) }
+            return ClientboundAwardStatisticsPacket(stats)
+        }
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundBlockDestructionPacket.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.clientbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.readVarInt
+import cn.rtast.libmc.protocol.protocol.game.block.BlockDestroyStage
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.readBlockPos
+
+/**
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Set_Block_Destroy_Stage
+ */
+public data class ClientboundBlockDestructionPacket(
+    val entityId: Int,
+    val location: BlockPos,
+    val stage: BlockDestroyStage,
+) : ClientboundPlayPacket {
+    public companion object Codec : PacketCodec<ClientboundBlockDestructionPacket> {
+        override fun encode(buffer: BytesBuffer, value: ClientboundBlockDestructionPacket) {}
+        override fun decode(buffer: BytesBuffer): ClientboundBlockDestructionPacket {
+            val entityId = buffer.readVarInt()
+            val location = buffer.readBlockPos()
+            val stage = buffer.readByte()
+            return ClientboundBlockDestructionPacket(entityId, location, BlockDestroyStage(stage))
+        }
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundBlockEntityDataPacket.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.clientbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.readVarInt
+import cn.rtast.libmc.nbt.NBTCompound
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.readBlockPos
+import cn.rtast.libmc.protocol.protocol.util.readNetworkNBTCompound
+
+public data class ClientboundBlockEntityDataPacket(val location: BlockPos, val type: Int, val data: NBTCompound) :
+    ClientboundPlayPacket {
+    public companion object Codec : PacketCodec<ClientboundBlockEntityDataPacket> {
+        override fun encode(buffer: BytesBuffer, value: ClientboundBlockEntityDataPacket) {}
+        override fun decode(buffer: BytesBuffer): ClientboundBlockEntityDataPacket {
+            val location = buffer.readBlockPos()
+            val type = buffer.readVarInt()
+            val data = buffer.readNetworkNBTCompound()
+            return ClientboundBlockEntityDataPacket(location, type, data)
+        }
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundDelimiterPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundDisconnectPlayPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundEntityAnimationPacket.kt

@@ -5,12 +5,12 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.readVarInt
-import cn.rtast.libmc.protocol.types.Animations
+import cn.rtast.libmc.protocol.protocol.game.Animations
 
 /**
  * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Entity_Animation

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundKeepAlivePlayPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundLoginPlayPacket.kt

@@ -5,12 +5,14 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.readVarInt
 import cn.rtast.libmc.protocol.protocol.game.*
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.readBlockPos
 
 public data class ClientboundLoginPlayPacket(
     val entityId: Int,

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundPingPlayPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundPlayPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.packet.MinecraftPacket
 

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundPlayerChatMessagePacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.*
 import cn.rtast.libmc.nbt.NBTCompound

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundSpawnEntityPacket.kt

@@ -5,16 +5,16 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
 import cn.rtast.libmc.common.readUuid
 import cn.rtast.libmc.common.readVarInt
-import cn.rtast.libmc.protocol.types.Angle
+import cn.rtast.libmc.protocol.protocol.game.math.Angle
-import cn.rtast.libmc.protocol.types.LpVec3
+import cn.rtast.libmc.protocol.protocol.game.math.LpVec3
-import cn.rtast.libmc.protocol.types.readAngle
+import cn.rtast.libmc.protocol.protocol.game.math.readAngle
-import cn.rtast.libmc.protocol.types.readLpVec3
+import cn.rtast.libmc.protocol.protocol.game.math.readLpVec3
 import kotlin.uuid.Uuid
 
 /**

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundStartConfigurationPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/clientbound/ClientboundSystemChatMessagePacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.clientbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundAcceptTeleportationPacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundAcceptTeleportationPacket(val teleportId: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundAcceptTeleportationPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundAcceptTeleportationPacket) {
+            buffer.writeVarInt(value.teleportId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundAcceptTeleportationPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundAcknowledgeChatMessagePacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundAcknowledgeChatMessagePacket(val messageCount: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundAcknowledgeChatMessagePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundAcknowledgeChatMessagePacket) {
+            buffer.writeVarInt(value.messageCount)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundAcknowledgeChatMessagePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundAttackActionPacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundAttackActionPacket(val entityId: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundAttackActionPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundAttackActionPacket) {
+            buffer.writeVarInt(value.entityId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundAttackActionPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundBundleItemSelectedPacket.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundBundleItemSelectedPacket(val slotOfBundle: Int, val slotInBundle: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundBundleItemSelectedPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundBundleItemSelectedPacket) {
+            buffer.writeVarInt(value.slotOfBundle)
+            buffer.writeVarInt(value.slotInBundle)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundBundleItemSelectedPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundChangeContainerSlotStatePacket.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundChangeContainerSlotStatePacket(val slotId: Int, val windowId: Int, val state: Boolean) :
+    MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundChangeContainerSlotStatePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundChangeContainerSlotStatePacket) {
+            buffer.writeVarInt(value.slotId)
+            buffer.writeVarInt(value.windowId)
+            buffer.writeBoolean(value.state)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundChangeContainerSlotStatePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundChangeDifficultyPacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.registry.GameDifficulty
+
+public data class ServerboundChangeDifficultyPacket(val newDifficulty: GameDifficulty) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundChangeDifficultyPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundChangeDifficultyPacket) {
+            buffer.writeByte(value.newDifficulty.id)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundChangeDifficultyPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundChangeGameModePacket.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.GameMode
+
+public data class ServerboundChangeGameModePacket(val gameMode: GameMode) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundChangeGameModePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundChangeGameModePacket) {
+            require(value.gameMode != GameMode.Unknown && value.gameMode != GameMode.Undefined)
+            buffer.writeVarInt(value.gameMode.id.toInt())
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundChangeGameModePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundChatCommandPacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+
+public data class ServerboundChatCommandPacket(val command: String) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundChatCommandPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundChatCommandPacket) {
+            buffer.writeMcString(value.command.removePrefix("/"))
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundChatCommandPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundChatMessagePacket.kt

@@ -0,0 +1,69 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/4
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundChatMessagePacket(
+    val message: String,
+    val timestamp: Long,
+    val salt: Long,
+    val signature: ByteArray?,
+    val messageCount: Int,
+    val acknowledged: ByteArray,
+    val checksum: Byte,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundChatMessagePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundChatMessagePacket) {
+            buffer.writeMcString(value.message)
+            buffer.writeLong(value.timestamp)
+            buffer.writeLong(value.salt)
+            val hasSignature = value.signature != null
+            buffer.writeBoolean(hasSignature)
+            if (hasSignature) buffer.writeBytes(value.signature)
+            buffer.writeVarInt(value.messageCount)
+            buffer.writeBytes(value.acknowledged)
+            buffer.writeByte(value.checksum)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundChatMessagePacket =
+            throw UnsupportedOperationException()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || this::class != other::class) return false
+
+        other as ServerboundChatMessagePacket
+
+        if (timestamp != other.timestamp) return false
+        if (salt != other.salt) return false
+        if (messageCount != other.messageCount) return false
+        if (checksum != other.checksum) return false
+        if (message != other.message) return false
+        if (!signature.contentEquals(other.signature)) return false
+        if (!acknowledged.contentEquals(other.acknowledged)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = timestamp.hashCode()
+        result = 31 * result + salt.hashCode()
+        result = 31 * result + messageCount
+        result = 31 * result + checksum
+        result = 31 * result + message.hashCode()
+        result = 31 * result + (signature?.contentHashCode() ?: 0)
+        result = 31 * result + acknowledged.contentHashCode()
+        return result
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundChunkBatchReceivedPacket.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+public data class ServerboundChunkBatchReceivedPacket(val chunksPerTick: Float) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundChunkBatchReceivedPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundChunkBatchReceivedPacket) {
+            buffer.writeFloat(value.chunksPerTick)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundChunkBatchReceivedPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundClientActionPacket.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.registry.ClientAction
+
+public data class ServerboundClientActionPacket(val action: ClientAction) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundClientActionPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundClientActionPacket) {
+            buffer.writeVarInt(value.action.actionID)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundClientActionPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundClientCommandPacket.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.player.PlayerActionStatus
+
+public data class ServerboundClientCommandPacket(val action: PlayerActionStatus) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundClientCommandPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundClientCommandPacket) {
+            buffer.writeVarInt(value.action.id)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundClientCommandPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundClientInformationPacket.kt

@@ -0,0 +1,67 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.ChatMode
+import cn.rtast.libmc.protocol.protocol.game.player.MainHand
+import cn.rtast.libmc.protocol.protocol.game.player.skin.ParticleStatus
+import cn.rtast.libmc.protocol.protocol.game.player.skin.SkinPartFlag
+import cn.rtast.libmc.protocol.protocol.game.player.skin.SkinPartFlags
+
+public data class ServerboundClientInformationPacket(
+    val locale: String,
+    /**
+     * real type is [Byte]
+     */
+    val viewDistance: Int,
+    val chatMode: ChatMode,
+    /**
+     * “Colors” multiplayer setting. The vanilla server stores this value but does nothing with it (see MC-64867).
+     * Some third-party servers disable all coloring in chat and system messages when it is false.
+     */
+    val chatColors: Boolean,
+    /**
+     * see [SkinPartFlags]
+     */
+    val displayedSkinParts: SkinPartFlag,
+    val mainHand: MainHand,
+    /**
+     * Enables filtering of text on signs and written book titles.
+     * The vanilla client sets this according to the profanityFilterPreferences.profanityFilterOn
+     * account attribute indicated by the Mojang API endpoint for player attributes.
+     * In offline mode, it is always false.
+     */
+    val enableTextFiltering: Boolean,
+    /**
+     * Servers usually list online players; this option should let you not show up in that list.
+     */
+    val allowServerListings: Boolean,
+    val particleStatus: ParticleStatus,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundClientInformationPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundClientInformationPacket) {
+            buffer.writeMcString(value.locale)
+            buffer.writeByte(value.viewDistance.toByte())
+            buffer.writeVarInt(value.chatMode.id)
+            buffer.writeBoolean(value.chatColors)
+            buffer.writeByte(value.displayedSkinParts.toByte())
+            buffer.writeVarInt(value.mainHand.id)
+            buffer.writeBoolean(value.enableTextFiltering)
+            buffer.writeBoolean(value.allowServerListings)
+            buffer.writeVarInt(value.particleStatus.id)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundClientInformationPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundClientTickEndPacket.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+public data object ServerboundClientTickEndPacket : MinecraftPacket, PacketCodec<ServerboundClientTickEndPacket> {
+    override fun encode(buffer: BytesBuffer, value: ServerboundClientTickEndPacket) {}
+    override fun decode(buffer: BytesBuffer): ServerboundClientTickEndPacket = throw UnsupportedOperationException()
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundCommandSuggestionRequestPacket.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundCommandSuggestionRequestPacket(
+    /**
+     * to get transaction id, use `MinecraftClient.transactionManager.nextCommandSuggestionId`
+     */
+    val transactionId: Int,
+    /**
+     * All the text behind the cursor including the / (e.g. to the left of the cursor in left-to-right languages like English).
+     */
+    val text: String,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundCommandSuggestionRequestPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundCommandSuggestionRequestPacket) {
+            buffer.writeVarInt(value.transactionId)
+            buffer.writeMcString(value.text)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundCommandSuggestionRequestPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundConfigurationAcknowledgedPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundContainerClickButtonPacket.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.block.EnchantmentButton
+import cn.rtast.libmc.protocol.block.LecternButton
+
+public data class ServerboundContainerClickButtonPacket(val windowId: Int, val buttonId: Int) : MinecraftPacket {
+    public constructor(windowId: Int, button: EnchantmentButton) : this(windowId, button.id)
+    public constructor(windowId: Int, button: LecternButton) : this(windowId, button.id)
+
+    public companion object Codec : PacketCodec<ServerboundContainerClickButtonPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundContainerClickButtonPacket) {
+            buffer.writeVarInt(value.windowId)
+            buffer.writeVarInt(value.buttonId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundContainerClickButtonPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundContainerClickPacket.kt

@@ -0,0 +1,73 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.container.ContainerButton
+import cn.rtast.libmc.protocol.protocol.game.inventory.ChangedSlot
+import cn.rtast.libmc.protocol.protocol.game.inventory.HashedSlot
+import cn.rtast.libmc.protocol.protocol.game.inventory.InventoryClickType
+
+public data class ServerboundContainerClickPacket(
+    val windowId: Int,
+    val stateId: Int,
+    val slot: Short,
+    val button: Byte,
+    val mode: Int,
+    val changedSlots: List<ChangedSlot>,
+    val carriedItem: HashedSlot,
+) : MinecraftPacket {
+    public constructor(
+        windowId: Int,
+        stateId: Int,
+        slot: Short,
+        mouseButton: ContainerButton.Mouse,
+        changedSlots: List<ChangedSlot>,
+        carriedItem: HashedSlot,
+    ) : this(
+        windowId = windowId,
+        stateId = stateId,
+        slot = slot,
+        button = mouseButton.id,
+        mode = InventoryClickType.PICKUP.id,
+        changedSlots = changedSlots,
+        carriedItem = carriedItem
+    )
+
+    public constructor(
+        windowId: Int,
+        stateId: Int,
+        slot: Short,
+        swapButton: ContainerButton.Swap,
+        changedSlots: List<ChangedSlot>,
+        carriedItem: HashedSlot,
+    ) : this(
+        windowId = windowId,
+        stateId = stateId,
+        slot = slot,
+        button = swapButton.id,
+        mode = InventoryClickType.SWAP.id,
+        changedSlots = changedSlots,
+        carriedItem = carriedItem
+    )
+
+    public companion object Codec : PacketCodec<ServerboundContainerClickPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundContainerClickPacket) {
+            buffer.writeVarInt(value.windowId)
+            buffer.writeVarInt(value.stateId)
+            buffer.writeShort(value.slot)
+            buffer.writeByte(value.button)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundContainerClickPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundContainerClosePacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundContainerClosePacket(val windowId: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundContainerClosePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundContainerClosePacket) {
+            buffer.writeVarInt(value.windowId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundContainerClosePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundCustomClickActionPacket.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.nbt.NBTCompound
+import cn.rtast.libmc.protocol.protocol.game.Identifier
+import cn.rtast.libmc.protocol.protocol.game.writeIdentifier
+import cn.rtast.libmc.protocol.protocol.util.writeNetworkNBTCompound
+
+public data class ServerboundCustomClickActionPacket(
+    val id: Identifier,
+    /**
+     * payload size, bytes
+     */
+    val size: Int,
+    val payload: NBTCompound,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundCustomClickActionPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundCustomClickActionPacket) {
+            buffer.writeIdentifier(value.id)
+            buffer.writeVarInt(value.size)
+            buffer.writeNetworkNBTCompound(value.payload)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundCustomClickActionPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundCustomPayloadPacket.kt

@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.protocol.game.Identifier
+import cn.rtast.libmc.protocol.protocol.game.writeIdentifier
+
+public data class ServerboundCustomPayloadPacket(val channel: Identifier, val data: ByteArray) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundCustomPayloadPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundCustomPayloadPacket) {
+            buffer.writeIdentifier(value.channel)
+            buffer.writeBytes(value.data)  // ?
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundCustomPayloadPacket =
+            throw UnsupportedOperationException()
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other == null || this::class != other::class) return false
+
+        other as ServerboundCustomPayloadPacket
+
+        if (channel != other.channel) return false
+        if (!data.contentEquals(other.data)) return false
+
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = channel.hashCode()
+        result = 31 * result + data.contentHashCode()
+        return result
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundDebugSubscriptionRequestPacket.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writePrefixedVarIntArray
+import cn.rtast.libmc.protocol.protocol.game.debug.DebugSubscriptionType
+
+public data class ServerboundDebugSubscriptionRequestPacket(val subscriptions: List<DebugSubscriptionType>) :
+    MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundDebugSubscriptionRequestPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundDebugSubscriptionRequestPacket) {
+            buffer.writePrefixedVarIntArray(value.subscriptions.map { it.id })
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundDebugSubscriptionRequestPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundEditBookPacket.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.*
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+public data class ServerboundEditBookPacket(val slot: Int, val entries: List<String>, val title: String?) :
+    MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundEditBookPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundEditBookPacket) {
+            buffer.writeVarInt(value.slot)
+            buffer.writePrefixedStringArray(value.entries)
+            val hasTitle = value.title != null
+            buffer.writeBoolean(hasTitle)
+            if (hasTitle) buffer.writeMcString(value.title)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundEditBookPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundInteractPacket.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.math.LpVec3
+import cn.rtast.libmc.protocol.protocol.game.math.writeLpVec3
+import cn.rtast.libmc.protocol.protocol.game.player.Hand
+
+public data class ServerboundInteractPacket(
+    val entityId: Int,
+    val hand: Hand,
+    val targetOffset: LpVec3,
+    val isSneaking: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundInteractPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundInteractPacket) {
+            buffer.writeVarInt(value.entityId)
+            buffer.writeVarInt(value.hand.id)
+            buffer.writeLpVec3(value.targetOffset)
+            buffer.writeBoolean(value.isSneaking)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundInteractPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundJigsawGeneratePacket.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.writeBlockPos
+
+public data class ServerboundJigsawGeneratePacket(
+    val location: BlockPos,
+    /**
+     * Value of the levels slider/max depth to generate.
+     */
+    val levels: Int,
+    val keepJigsaw: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundJigsawGeneratePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundJigsawGeneratePacket) {
+            buffer.writeBlockPos(value.location)
+            buffer.writeVarInt(value.levels)
+            buffer.writeBoolean(value.keepJigsaw)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundJigsawGeneratePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundKeepAlivePlayPacket.kt

@@ -5,7 +5,7 @@
  */
 
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundLockDifficultyPacket.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+/**
+ * Must have at least op level 2 to use.
+ * Appears to only be used on singleplayer; the difficulty buttons are still disabled in multiplayer.
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Lock_Difficulty
+ */
+public data class ServerboundLockDifficultyPacket(val locked: Boolean) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundLockDifficultyPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundLockDifficultyPacket) {
+            buffer.writeBoolean(value.locked)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundLockDifficultyPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundMoveVehiclePacket.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+/**
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Move_Vehicle_(serverbound)
+ * onGround does not seem to exist
+ */
+public data class ServerboundMoveVehiclePacket(
+    val x: Double,
+    val y: Double,
+    val z: Double,
+    val yaw: Float,
+    val pitch: Float,
+//    val onGround: Boolean
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundMoveVehiclePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundMoveVehiclePacket) {
+            buffer.writeDouble(value.x)
+            buffer.writeDouble(value.y)
+            buffer.writeDouble(value.z)
+            buffer.writeFloat(value.yaw)
+            buffer.writeFloat(value.pitch)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundMoveVehiclePacket = throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPaddleBoatPacket.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+/**
+ * Used to visually update whether boat paddles are turning.
+ * The server will update the Boat entity metadata to match the values here.
+ *
+ * Right paddle turning is set to true when the left button or forward button is held,
+ * left paddle turning is set to true when the right button or forward button is held.
+ *
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Paddle_Boat
+ */
+public data class ServerboundPaddleBoatPacket(
+    val leftPaddleTurning: Boolean,
+    val rightPaddleTurning: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPaddleBoatPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPaddleBoatPacket) {
+            buffer.writeBoolean(value.leftPaddleTurning)
+            buffer.writeBoolean(value.rightPaddleTurning)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPaddleBoatPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPickItemFromBlockPacket.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.writeBlockPos
+
+public data class ServerboundPickItemFromBlockPacket(
+    val location: BlockPos,
+    /**
+     * Used to tell the server to include block data in the new stack,
+     * works only if in creative mode.
+     */
+    val includeData: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPickItemFromBlockPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPickItemFromBlockPacket) {
+            buffer.writeBlockPos(value.location)
+            buffer.writeBoolean(value.includeData)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPickItemFromBlockPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPickItemFromEntityPacket.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundPickItemFromEntityPacket(
+    val entityId: Int,
+    /**
+     * Unused by the vanilla server.
+     */
+    val includeData: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPickItemFromEntityPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPickItemFromEntityPacket) {
+            buffer.writeVarInt(value.entityId)
+            buffer.writeBoolean(value.includeData)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPickItemFromEntityPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPlaceRecipePacket.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundPlaceRecipePacket(
+    val windowId: Int,
+    val recipeId: Int,
+    val makeAll: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPlaceRecipePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPlaceRecipePacket) {
+            buffer.writeVarInt(value.windowId)
+            buffer.writeVarInt(value.recipeId)
+            buffer.writeBoolean(value.makeAll)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPlaceRecipePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPlayerAbilitiesPacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.protocol.game.player.PlayerAbilities
+
+public data class ServerboundPlayerAbilitiesPacket(val flags: PlayerAbilities) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPlayerAbilitiesPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPlayerAbilitiesPacket) {
+            buffer.writeByte(value.flags.flag)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPlayerAbilitiesPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPlayerActionPacket.kt

@@ -0,0 +1,43 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.block.BlockFace
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.writeBlockPos
+import cn.rtast.libmc.protocol.protocol.game.player.PlayerActionStatus
+
+/**
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Player_Action
+ */
+public data class ServerboundPlayerActionPacket(
+    val status: PlayerActionStatus,
+    val location: BlockPos,
+    val blockFace: BlockFace,
+    /**
+     * Block change sequence number
+     * see [cn.rtast.libmc.protocol.packet.play.clientbound.ClientboundAcknowledgeBlockChangePacket]
+     */
+    val sequence: Int,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPlayerActionPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPlayerActionPacket) {
+            buffer.writeVarInt(value.status.id)
+            buffer.writeBlockPos(value.location)
+            buffer.writeByte(value.blockFace.id)
+            buffer.writeVarInt(value.sequence)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPlayerActionPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPlayerCommandPacket.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.player.PlayerCommandAction
+
+public data class ServerboundPlayerCommandPacket(
+    val entityId: Int,
+    val action: PlayerCommandAction,
+    /**
+     * Only used by the “start jump with horse” action,
+     * in which case it ranges from 0 to 100. In all other cases it is 0
+     */
+    val jumpBoost: Int,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPlayerCommandPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundPlayerCommandPacket) {
+            buffer.writeVarInt(value.entityId)
+            buffer.writeVarInt(value.action.id)
+            buffer.writeVarInt(value.jumpBoost)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPlayerCommandPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPlayerInputPacket.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+public data class ServerboundPlayerInputPacket(
+    val forward: Boolean,
+    val backward: Boolean,
+    val left: Boolean,
+    val right: Boolean,
+    val jump: Boolean,
+    val sneak: Boolean,
+    val sprint: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundPlayerInputPacket> {
+        private const val FLAG_FORWARD = 0x01
+        private const val FLAG_BACKWARD = 0x02
+        private const val FLAG_LEFT = 0x04
+        private const val FLAG_RIGHT = 0x08
+        private const val FLAG_JUMP = 0x10
+        private const val FLAG_SNEAK = 0x20
+        private const val FLAG_SPRINT = 0x40
+
+        override fun encode(buffer: BytesBuffer, value: ServerboundPlayerInputPacket) {
+            var flags = 0
+            if (value.forward) flags = flags or FLAG_FORWARD
+            if (value.backward) flags = flags or FLAG_BACKWARD
+            if (value.left) flags = flags or FLAG_LEFT
+            if (value.right) flags = flags or FLAG_RIGHT
+            if (value.jump) flags = flags or FLAG_JUMP
+            if (value.sneak) flags = flags or FLAG_SNEAK
+            if (value.sprint) flags = flags or FLAG_SPRINT
+            buffer.writeByte(flags.toByte())
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundPlayerInputPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPlayerLoadedPacket.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+public data object ServerboundPlayerLoadedPacket : MinecraftPacket, PacketCodec<ServerboundPlayerLoadedPacket> {
+    override fun encode(buffer: BytesBuffer, value: ServerboundPlayerLoadedPacket) {}
+    override fun decode(buffer: BytesBuffer): ServerboundPlayerLoadedPacket = throw UnsupportedOperationException()
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundPongPlayPacket.kt

@@ -4,7 +4,7 @@
  * Date: 2026/9/5
  */
 
-package cn.rtast.libmc.protocol.packet.play
+package cn.rtast.libmc.protocol.packet.play.serverbound
 
 import cn.rtast.libmc.common.BytesBuffer
 import cn.rtast.libmc.common.PacketCodec
@@ -16,8 +16,7 @@ public data class ServerboundPongPlayPacket(val id: Int) : MinecraftPacket {
             buffer.writeInt(value.id)
         }
 
-        override fun decode(buffer: BytesBuffer): ServerboundPongPlayPacket {
+        override fun decode(buffer: BytesBuffer): ServerboundPongPlayPacket =
-            return ServerboundPongPlayPacket(id = buffer.readInt())
+            throw UnsupportedOperationException()
-        }
     }
 }

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundQueryBlockEntityTagPacket.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+
+/**
+ * to get a transaction id, use `MinecraftClient.transactionManager.nextQueryId`
+ */
+public data class ServerboundQueryBlockEntityTagPacket(val transactionId: Int, val location: BlockPos) :
+    MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundQueryBlockEntityTagPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundQueryBlockEntityTagPacket) {
+            buffer.writeVarInt(value.transactionId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundQueryBlockEntityTagPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundQueryEntityTagPacket.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundQueryEntityTagPacket(
+    /**
+     * to get a transaction id, use `MinecraftClient.transactionManager.nextQueryEntitytagId`
+     */
+    val transactionId: Int,
+    val entityId: Int,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundQueryEntityTagPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundQueryEntityTagPacket) {
+            buffer.writeVarInt(value.transactionId)
+            buffer.writeVarInt(value.entityId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundQueryEntityTagPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundRecipeBookChangeSettingsPacket.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.item.RecipeBookType
+
+public data class ServerboundRecipeBookChangeSettingsPacket(
+    val bookId: RecipeBookType,
+    val bookOpen: Boolean,
+    val filterActive: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundRecipeBookChangeSettingsPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundRecipeBookChangeSettingsPacket) {
+            buffer.writeVarInt(value.bookId.id)
+            buffer.writeBoolean(value.bookOpen)
+            buffer.writeBoolean(value.filterActive)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundRecipeBookChangeSettingsPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundRecipeBookSeenRecipePacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundRecipeBookSeenRecipePacket(val recipeId: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundRecipeBookSeenRecipePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundRecipeBookSeenRecipePacket) {
+            buffer.writeVarInt(value.recipeId)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundRecipeBookSeenRecipePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundRenameItemPacket.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+
+public data class ServerboundRenameItemPacket(val itemName: String) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundRenameItemPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundRenameItemPacket) {
+            require(value.itemName.length < 50)
+            buffer.writeMcString(value.itemName)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundRenameItemPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundResourcePackResponsePacket.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeUuid
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.resources.ResourcePackResult
+import kotlin.uuid.Uuid
+
+public data class ServerboundResourcePackResponsePacket(
+    val uuid: Uuid,
+    val result: ResourcePackResult,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundResourcePackResponsePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundResourcePackResponsePacket) {
+            buffer.writeUuid(value.uuid)
+            buffer.writeVarInt(value.result.id)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundResourcePackResponsePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSeenAdvancementsPacket.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.Identifier
+import cn.rtast.libmc.protocol.protocol.game.advancement.AdvancementAction
+import cn.rtast.libmc.protocol.protocol.game.writeIdentifier
+
+public data class ServerboundSeenAdvancementsPacket(val action: AdvancementAction, val tabId: Identifier?) :
+    MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSeenAdvancementsPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSeenAdvancementsPacket) {
+            buffer.writeVarInt(value.action.id)
+            if (value.action == AdvancementAction.OPENED_TAB) {
+                requireNotNull(value.tabId) { "tabId must not be null when action is OPENED_TAB" }
+                buffer.writeIdentifier(value.tabId)
+            } else require(value.tabId == null) { "tabId must be null when action is CLOSED_SCREEN" }
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSeenAdvancementsPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSelectTradePacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundSelectTradePacket(val selectedSlot: Int) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSelectTradePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSelectTradePacket) {
+            buffer.writeVarInt(value.selectedSlot)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSelectTradePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetBeaconPacket.kt

@@ -0,0 +1,30 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeVarInt
+
+/**
+ * ref: https://minecraft.wiki/w/Java_Edition_protocol/Packets#Set_Beacon_Effect
+ */
+public data class ServerboundSetBeaconPacket(val primaryEffect: Int?, val secondaryEffect: Int?) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetBeaconPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetBeaconPacket) {
+            buffer.writeBoolean(value.primaryEffect != null)
+            if (value.primaryEffect != null) buffer.writeVarInt(value.primaryEffect)
+            buffer.writeBoolean(value.secondaryEffect != null)
+            if (value.secondaryEffect != null) buffer.writeVarInt(value.secondaryEffect)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetBeaconPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetCarriedItemPacket.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+
+public data class ServerboundSetCarriedItemPacket(val slot: Short) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetCarriedItemPacket> {
+        private const val MIN_SLOT: Short = 0
+        private const val MAX_SLOT: Short = 8
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetCarriedItemPacket) {
+            require(value.slot in MIN_SLOT..MAX_SLOT) { "Carried item slot ${value.slot} must be between $MIN_SLOT and $MAX_SLOT" }
+            buffer.writeShort(value.slot)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetCarriedItemPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetCommandBlockPacket.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.CommandBlockMode
+import cn.rtast.libmc.protocol.protocol.game.block.writeBlockPos
+
+public data class ServerboundSetCommandBlockPacket(
+    val location: BlockPos,
+    val command: String,
+    val mode: CommandBlockMode,
+    val trackOutput: Boolean,
+    val conditional: Boolean,
+    val automatic: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetCommandBlockPacket> {
+        private const val FLAG_TRACK_OUTPUT = 0x01
+        private const val FLAG_CONDITIONAL = 0x02
+        private const val FLAG_AUTOMATIC = 0x04
+
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetCommandBlockPacket) {
+            var flags = 0
+            if (value.trackOutput) flags = flags or FLAG_TRACK_OUTPUT
+            if (value.conditional) flags = flags or FLAG_CONDITIONAL
+            if (value.automatic) flags = flags or FLAG_AUTOMATIC
+            buffer.writeBlockPos(value.location)
+            buffer.writeMcString(value.command)
+            buffer.writeVarInt(value.mode.id)
+            buffer.writeByte(flags.toByte())
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetCommandBlockPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetCommandMinecartPacket.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writeVarInt
+
+public data class ServerboundSetCommandMinecartPacket(
+    val entityId: Int,
+    val command: String,
+    /**
+     * If false, the output of the previous command will not be stored within the command block.
+     */
+    val trackOutput: Boolean,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetCommandMinecartPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetCommandMinecartPacket) {
+            buffer.writeVarInt(value.entityId)
+            buffer.writeMcString(value.command)
+            buffer.writeBoolean(value.trackOutput)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetCommandMinecartPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetCreativeModeSlotPacket.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.protocol.game.inventory.Slot
+import cn.rtast.libmc.protocol.protocol.game.inventory.writeSlot
+
+public data class ServerboundSetCreativeModeSlotPacket(val slot: Short, val clickedItem: Slot) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetCreativeModeSlotPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetCreativeModeSlotPacket) {
+            buffer.writeShort(value.slot)
+            buffer.writeSlot(value.clickedItem)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetCreativeModeSlotPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetGameRulePacket.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writePrefixedArray
+import cn.rtast.libmc.protocol.protocol.game.gamerule.GameRuleEntry
+
+public data class ServerboundSetGameRulePacket(val rules: List<GameRuleEntry>) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetGameRulePacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetGameRulePacket) {
+            buffer.writePrefixedArray(value.rules) { rule ->
+                writeMcString(rule.name)
+                writeMcString(rule.value)
+            }
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetGameRulePacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetJigsawBlockPacket.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/6
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.common.writeMcString
+import cn.rtast.libmc.common.writeVarInt
+import cn.rtast.libmc.protocol.protocol.game.Identifier
+import cn.rtast.libmc.protocol.protocol.game.block.BlockPos
+import cn.rtast.libmc.protocol.protocol.game.block.writeBlockPos
+import cn.rtast.libmc.protocol.protocol.game.writeIdentifier
+
+public data class ServerboundSetJigsawBlockPacket(
+    val location: BlockPos,
+    val name: Identifier,
+    val target: Identifier,
+    val pool: Identifier,
+    val finalState: String,
+    val jointType: String,
+    val selectionPriority: Int,
+    val placementPriority: Int,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetJigsawBlockPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetJigsawBlockPacket) {
+            buffer.writeBlockPos(value.location)
+            buffer.writeIdentifier(value.name)
+            buffer.writeIdentifier(value.target)
+            buffer.writeIdentifier(value.pool)
+            buffer.writeMcString(value.finalState)
+            buffer.writeMcString(value.jointType)
+            buffer.writeVarInt(value.selectionPriority)
+            buffer.writeVarInt(value.placementPriority)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetJigsawBlockPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetPlayerMovementFlagPacket.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.protocol.game.player.PlayerPositionFlag
+
+public data class ServerboundSetPlayerMovementFlagPacket(val flags: PlayerPositionFlag) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetPlayerMovementFlagPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetPlayerMovementFlagPacket) {
+            buffer.writeByte(value.flags.flag)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetPlayerMovementFlagPacket =
+            throw UnsupportedOperationException()
+    }
+}

libmc-protocol/src/commonMain/kotlin/cn/rtast/libmc/protocol/packet/play/serverbound/ServerboundSetPlayerPositionAndRotationPacket.kt

@@ -0,0 +1,45 @@
+/*
+ * Copyright © 2026 RTAkland
+ * Author: RTAkland
+ * Date: 2026/9/5
+ */
+
+
+package cn.rtast.libmc.protocol.packet.play.serverbound
+
+import cn.rtast.libmc.common.BytesBuffer
+import cn.rtast.libmc.common.PacketCodec
+import cn.rtast.libmc.common.packet.MinecraftPacket
+import cn.rtast.libmc.protocol.protocol.game.player.PlayerPositionFlag
+
+public data class ServerboundSetPlayerPositionAndRotationPacket(
+    val x: Double,
+    /**
+     * Absolute feet position, normally Head Y - 1.62.
+     */
+    val feetY: Double,
+    val z: Double,
+    /**
+     * Absolute rotation on the X Axis, in degrees.
+     */
+    val yaw: Float,
+    /**
+     * Absolute rotation on the Y Axis, in degrees.
+     */
+    val pitch: Float,
+    val flags: PlayerPositionFlag,
+) : MinecraftPacket {
+    public companion object Codec : PacketCodec<ServerboundSetPlayerPositionAndRotationPacket> {
+        override fun encode(buffer: BytesBuffer, value: ServerboundSetPlayerPositionAndRotationPacket) {
+            buffer.writeDouble(value.x)
+            buffer.writeDouble(value.feetY)
+            buffer.writeDouble(value.z)
+            buffer.writeFloat(value.yaw)
+            buffer.writeFloat(value.pitch)
+            buffer.writeByte(value.flags.flag)
+        }
+
+        override fun decode(buffer: BytesBuffer): ServerboundSetPlayerPositionAndRotationPacket =
+            throw UnsupportedOperationException()
+    }
+}