Pre-release protocol

This page documents the changes from the last stable Minecraft release (currently 1.20.4, protocol 765) to the current pre-release (currently 24w03a, protocol Snapshot {{#expr: 1073741995 - 1073741824}}). Note that this page contains bleeding-edge information that may not be completely or correctly documented.

One who wishes to commandeer the merging of this into Protocol when an update is made must be sure to respect any changes that may have occurred to the respective packets there.

Contents

Data types

No changes so far.

Packets

ID	Packet name	Documentation
Handshake serverbound
0x00	Handshake	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Login clientbound
0x05	Cookie Request (login)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Login serverbound
0x04	Cookie Response (login)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Configuration clientbound
0x00	Cookie Request (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x00}}{{#if:0x01|{{#if:0x00| }}0x01}}	Clientbound Plugin Message (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x01}}{{#if:0x02|{{#if:0x01| }}0x02}}	Disconnect (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x02}}{{#if:0x03|{{#if:0x02| }}0x03}}	Finish Configuration	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x03}}{{#if:0x04|{{#if:0x03| }}0x04}}	Clientbound Keep Alive (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x04}}{{#if:0x05|{{#if:0x04| }}0x05}}	Ping (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x05}}{{#if:0x06|{{#if:0x05| }}0x06}}	Registry Data	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x06}}{{#if:0x07|{{#if:0x06| }}0x07}}	Remove Resource Pack (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x07}}{{#if:0x08|{{#if:0x07| }}0x08}}	Add Resource Pack (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x09	Store Cookie (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x0A	Transfer (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x08}}{{#if:0x0B|{{#if:0x08| }}0x0B}}	Feature Flags	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x09}}{{#if:0x0C|{{#if:0x09| }}0x0C}}	Update Tags (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Configuration serverbound
0x01	Cookie Response (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x01}}{{#if:0x02|{{#if:0x01| }}0x02}}	Serverbound Plugin Message (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x02}}{{#if:0x03|{{#if:0x02| }}0x03}}	Finish Configuration	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x03}}{{#if:0x04|{{#if:0x03| }}0x04}}	Serverbound Keep Alive (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x04}}{{#if:0x05|{{#if:0x04| }}0x05}}	Pong (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x05}}{{#if:0x06|{{#if:0x05| }}0x06}}	Resource Pack Response (configuration)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Play clientbound
0x16	Cookie Request (Play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x16}}{{#if:0x17|{{#if:0x16| }}0x17}}	Set Cooldown	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x17}}{{#if:0x18|{{#if:0x17| }}0x18}}	Chat Suggestions	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x18}}{{#if:0x19|{{#if:0x18| }}0x19}}	Clientbound Plugin Message (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x19}}{{#if:0x1A|{{#if:0x19| }}0x1A}}	Damage Event	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1A}}{{#if:0x1B|{{#if:0x1A| }}0x1B}}	Delete Message	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1B}}{{#if:0x1C|{{#if:0x1B| }}0x1C}}	Disconnect (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1C}}{{#if:0x1D|{{#if:0x1C| }}0x1D}}	Disguised Chat Message	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1D}}{{#if:0x1E|{{#if:0x1D| }}0x1E}}	Entity Event	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1E}}{{#if:0x1F|{{#if:0x1E| }}0x1F}}	Explosion	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1F}}{{#if:0x20|{{#if:0x1F| }}0x20}}	Unload Chunk	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x20}}{{#if:0x21|{{#if:0x20| }}0x21}}	Game Event	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x21}}{{#if:0x22|{{#if:0x21| }}0x22}}	Open Horse Screen	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x22}}{{#if:0x23|{{#if:0x22| }}0x23}}	Hurt Animation	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x23}}{{#if:0x24|{{#if:0x23| }}0x24}}	Initialize World Border	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x24}}{{#if:0x25|{{#if:0x24| }}0x25}}	Clientbound Keep Alive (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x25}}{{#if:0x26|{{#if:0x25| }}0x26}}	Chunk Data and Update Light	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x26}}{{#if:0x27|{{#if:0x26| }}0x27}}	World Event	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x27}}{{#if:0x28|{{#if:0x27| }}0x28}}	Particle	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x28}}{{#if:0x29|{{#if:0x28| }}0x29}}	Update Light	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x29}}{{#if:0x2A|{{#if:0x29| }}0x2A}}	Login (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2A}}{{#if:0x2B|{{#if:0x2A| }}0x2B}}	Map Data	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2B}}{{#if:0x2C|{{#if:0x2B| }}0x2C}}	Merchant Offers	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2C}}{{#if:0x2D|{{#if:0x2C| }}0x2D}}	Update Entity Position	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2D}}{{#if:0x2E|{{#if:0x2D| }}0x2E}}	Update Entity Position and Rotation	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2E}}{{#if:0x2F|{{#if:0x2E| }}0x2F}}	Update Entity Rotation	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2F}}{{#if:0x30|{{#if:0x2F| }}0x30}}	Move Vehicle	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x30}}{{#if:0x31|{{#if:0x30| }}0x31}}	Open Book	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x31}}{{#if:0x32|{{#if:0x31| }}0x32}}	Open Screen	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x32}}{{#if:0x33|{{#if:0x32| }}0x33}}	Open Sign Editor	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x33}}{{#if:0x34|{{#if:0x33| }}0x34}}	Ping (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x34}}{{#if:0x35|{{#if:0x34| }}0x35}}	Ping Response (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x35}}{{#if:0x36|{{#if:0x35| }}0x36}}	Place Ghost Recipe	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x36}}{{#if:0x37|{{#if:0x36| }}0x37}}	Player Abilities	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x37}}{{#if:0x38|{{#if:0x37| }}0x38}}	Player Chat Message	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x38}}{{#if:0x39|{{#if:0x38| }}0x39}}	End Combat	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x39}}{{#if:0x3A|{{#if:0x39| }}0x3A}}	Enter Combat	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3A}}{{#if:0x3B|{{#if:0x3A| }}0x3B}}	Combat Death	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3B}}{{#if:0x3C|{{#if:0x3B| }}0x3C}}	Player Info Remove	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3C}}{{#if:0x3D|{{#if:0x3C| }}0x3D}}	Player Info Update	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3D}}{{#if:0x3E|{{#if:0x3D| }}0x3E}}	Look At	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3E}}{{#if:0x3F|{{#if:0x3E| }}0x3F}}	Synchronize Player Position	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x3F}}{{#if:0x40|{{#if:0x3F| }}0x40}}	Update Recipe Book	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x40}}{{#if:0x41|{{#if:0x40| }}0x41}}	Remove Entities	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x41}}{{#if:0x42|{{#if:0x41| }}0x42}}	Remove Entity Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x42}}{{#if:0x43|{{#if:0x42| }}0x43}}	Reset Score	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x43}}{{#if:0x44|{{#if:0x43| }}0x44}}	Remove Resource Pack (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x44}}{{#if:0x45|{{#if:0x44| }}0x45}}	Add Resource Pack (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x45}}{{#if:0x46|{{#if:0x45| }}0x46}}	Respawn	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x46}}{{#if:0x47|{{#if:0x46| }}0x47}}	Set Head Rotation	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x47}}{{#if:0x48|{{#if:0x47| }}0x48}}	Update Section Blocks	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x48}}{{#if:0x49|{{#if:0x48| }}0x49}}	Select Advancements Tab	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x49}}{{#if:0x4A|{{#if:0x49| }}0x4A}}	Server Data	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4A}}{{#if:0x4B|{{#if:0x4A| }}0x4B}}	Set Action Bar Text	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4B}}{{#if:0x4C|{{#if:0x4B| }}0x4C}}	Set Border Center	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4C}}{{#if:0x4D|{{#if:0x4C| }}0x4D}}	Set Border Lerp Size	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4D}}{{#if:0x4E|{{#if:0x4D| }}0x4E}}	Set Border Size	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4E}}{{#if:0x4F|{{#if:0x4E| }}0x4F}}	Set Border Warning Delay	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x4F}}{{#if:0x50|{{#if:0x4F| }}0x50}}	Set Border Warning Distance	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x50}}{{#if:0x51|{{#if:0x50| }}0x51}}	Set Camera	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x51}}{{#if:0x52|{{#if:0x51| }}0x52}}	Set Held Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x52}}{{#if:0x53|{{#if:0x52| }}0x53}}	Set Center Chunk	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x53}}{{#if:0x54|{{#if:0x53| }}0x54}}	Set Render Distance	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x54}}{{#if:0x55|{{#if:0x54| }}0x55}}	Set Default Spawn Position	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x55}}{{#if:0x56|{{#if:0x55| }}0x56}}	Display Objective	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x56}}{{#if:0x57|{{#if:0x56| }}0x57}}	Set Entity Metadata	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x57}}{{#if:0x58|{{#if:0x57| }}0x58}}	Link Entities	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x58}}{{#if:0x59|{{#if:0x58| }}0x59}}	Set Entity Velocity	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x59}}{{#if:0x5A|{{#if:0x59| }}0x5A}}	Set Equipment	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x5A}}{{#if:0x5B|{{#if:0x5A| }}0x5B}}	Set Experience	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x5B}}{{#if:0x5C|{{#if:0x5B| }}0x5C}}	Set Health	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x5C}}{{#if:0x5D|{{#if:0x5C| }}0x5D}}	Update Objectives	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x5D}}{{#if:0x5E|{{#if:0x5D| }}0x5E}}	Set Passengers	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x5E}}{{#if:0x5F|{{#if:0x5E| }}0x5F}}	Update Teams	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x5F}}{{#if:0x60|{{#if:0x5F| }}0x60}}	Update Score	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x60}}{{#if:0x61|{{#if:0x60| }}0x61}}	Set Simulation Distance	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x61}}{{#if:0x62|{{#if:0x61| }}0x62}}	Set Subtitle Text	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x62}}{{#if:0x63|{{#if:0x62| }}0x63}}	Update Time	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x63}}{{#if:0x64|{{#if:0x63| }}0x64}}	Set Title Text	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x64}}{{#if:0x65|{{#if:0x64| }}0x65}}	Set Title Animation Times	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x65}}{{#if:0x66|{{#if:0x65| }}0x66}}	Entity Sound Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x66}}{{#if:0x67|{{#if:0x66| }}0x67}}	Sound Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x67}}{{#if:0x68|{{#if:0x67| }}0x68}}	Start Configuration	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x68}}{{#if:0x69|{{#if:0x68| }}0x69}}	Stop Sound	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6A	Store Cookie (Play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x69}}{{#if:0x6B|{{#if:0x69| }}0x6B}}	System Chat Message	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6A}}{{#if:0x6C|{{#if:0x6A| }}0x6C}}	Set Tab List Header And Footer	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6B}}{{#if:0x6D|{{#if:0x6B| }}0x6D}}	Tag Query Response	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6C}}{{#if:0x6E|{{#if:0x6C| }}0x6E}}	Pickup Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6D}}{{#if:0x6F|{{#if:0x6D| }}0x6F}}	Teleport Entity	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6E}}{{#if:0x70|{{#if:0x6E| }}0x70}}	Set Ticking State	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x6F}}{{#if:0x71|{{#if:0x6F| }}0x71}}	Step Tick	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x72	Transfer (Play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x70}}{{#if:0x73|{{#if:0x70| }}0x73}}	Update Advancements	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x71}}{{#if:0x74|{{#if:0x71| }}0x74}}	Update Attributes	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x72}}{{#if:0x75|{{#if:0x72| }}0x75}}	Entity Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x73}}{{#if:0x76|{{#if:0x73| }}0x76}}	Update Recipes	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x74}}{{#if:0x77|{{#if:0x74| }}0x77}}	Update Tags (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
Play serverbound
0x10	Cookie Response (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x10}}{{#if:0x11|{{#if:0x10| }}0x11}}	Serverbound Plugin Message (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x11}}{{#if:0x12|{{#if:0x11| }}0x12}}	Edit Book	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x12}}{{#if:0x13|{{#if:0x12| }}0x13}}	Query Entity Tag	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x13}}{{#if:0x14|{{#if:0x13| }}0x14}}	Interact	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x14}}{{#if:0x15|{{#if:0x14| }}0x15}}	Jigsaw Generate	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x15}}{{#if:0x16|{{#if:0x15| }}0x16}}	Serverbound Keep Alive (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x16}}{{#if:0x17|{{#if:0x16| }}0x17}}	Lock Difficulty	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x17}}{{#if:0x18|{{#if:0x17| }}0x18}}	Set Player Position	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x18}}{{#if:0x19|{{#if:0x18| }}0x19}}	Set Player Position and Rotation	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x19}}{{#if:0x1A|{{#if:0x19| }}0x1A}}	Set Player Rotation	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1A}}{{#if:0x1B|{{#if:0x1A| }}0x1B}}	Set Player On Ground	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1B}}{{#if:0x1C|{{#if:0x1B| }}0x1C}}	Move Vehicle	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1C}}{{#if:0x1D|{{#if:0x1C| }}0x1D}}	Paddle Boat	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1D}}{{#if:0x1E|{{#if:0x1D| }}0x1E}}	Pick Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1E}}{{#if:0x1F|{{#if:0x1E| }}0x1F}}	Ping Request (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x1F}}{{#if:0x20|{{#if:0x1F| }}0x20}}	Place Recipe	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x20}}{{#if:0x21|{{#if:0x20| }}0x21}}	Player Abilities	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x21}}{{#if:0x22|{{#if:0x21| }}0x22}}	Player Action	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x22}}{{#if:0x23|{{#if:0x22| }}0x23}}	Player Command	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x23}}{{#if:0x24|{{#if:0x23| }}0x24}}	Player Input	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x24}}{{#if:0x25|{{#if:0x24| }}0x25}}	Pong (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x25}}{{#if:0x26|{{#if:0x25| }}0x26}}	Change Recipe Book Settings	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x26}}{{#if:0x27|{{#if:0x26| }}0x27}}	Set Seen Recipe	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x27}}{{#if:0x28|{{#if:0x27| }}0x28}}	Rename Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x28}}{{#if:0x29|{{#if:0x28| }}0x29}}	Resource Pack Response (play)	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x29}}{{#if:0x2A|{{#if:0x29| }}0x2A}}	Seen Advancements	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2A}}{{#if:0x2B|{{#if:0x2A| }}0x2B}}	Select Trade	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2B}}{{#if:0x2C|{{#if:0x2B| }}0x2C}}	Set Beacon Effect	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2C}}{{#if:0x2D|{{#if:0x2C| }}0x2D}}	Set Held Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2D}}{{#if:0x2E|{{#if:0x2D| }}0x2E}}	Program Command Block	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2E}}{{#if:0x2F|{{#if:0x2E| }}0x2F}}	Program Command Block Minecart	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x2F}}{{#if:0x30|{{#if:0x2F| }}0x30}}	Set Creative Mode Slot	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x30}}{{#if:0x31|{{#if:0x30| }}0x31}}	Program Jigsaw Block	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x31}}{{#if:0x32|{{#if:0x31| }}0x32}}	Program Structure Block	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x32}}{{#if:0x33|{{#if:0x32| }}0x33}}	Update Sign	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x33}}{{#if:0x34|{{#if:0x33| }}0x34}}	Swing Arm	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x34}}{{#if:0x35|{{#if:0x34| }}0x35}}	Teleport To Entity	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x35}}{{#if:0x36|{{#if:0x35| }}0x36}}	Use Item On	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}
0x36}}{{#if:0x37|{{#if:0x36| }}0x37}}	Use Item	added	Current }}	removed	unchanged | (unchanged) | Pre }} }}

New/modified data types

No changes so far.

Entity Metadata

Type (VarInt Enum)	Value (Varies)	Notes
0	Byte
1	VarInt
2	VarLong
3	Float
4	String
5	Chat
6	OptChat (Boolean + Chat)	Chat is present if the Boolean is set to true
7	Slot
8	Boolean
9	Rotation	3 Floats: rotation on x, rotation on y, rotation on z
10	Position
11	OptPosition (Boolean + Position)	Position is present if the Boolean is set to true
12	Direction (VarInt)	(Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5)
13	OptUUID (Boolean + UUID)	UUID is present if the Boolean is set to true
14	BlockID (VarInt)
15	OptBlockID (VarInt)	0 for absent (implies air); otherwise, a block state ID as per the block state registry
16	NBT
17	Particle
18	Villager Data	3 VarInts: villager type, villager profession, level
19	OptVarInt	0 for absent; 1 + actual value otherwise. Used for entity IDs.
20	Pose	A VarInt enum: 0: STANDING, 1: FALL_FLYING, 2: SLEEPING, 3: SWIMMING, 4: SPIN_ATTACK, 5: SNEAKING, 6: LONG_JUMPING, 7: DYING, 8: CROAKING, 9: USING_TONGUE, 10: SITTING, 11: ROARING, 12: SNIFFING, 13: EMERGING, 14: DIGGING
21	Cat Variant	A VarInt that points towards the CAT_VARIANT registry.
22	Frog Variant	A VarInt that points towards the FROG_VARIANT registry.
23	OptGlobalPos (Boolean + GlobalPos)	GlobalPos consists of a dimension identifier and Position.
24	Painting Variant	A VarInt that points towards the PAINTING_VARIANT registry.
25	Sniffer State	A VarInt enum: IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
26	Armadillo State	A VarInt enum: IDLE = 0, ROLLING = 1, SCARED = 2
26}}{{#if:27|{{#if:26| }}27}}	Vector3	3 Floats: x, y, z
27}}{{#if:28|{{#if:27| }}28}}	Quaternion	4 Floats: x, y, z, w

Armadillo

{{#if:Armadillo||}} {{#vardefine:meta_current_entity|Armadillo}}

{{#if:{{#var:meta_prerelease}}|

   {{#if:Animal
       | {{#if:
           | Extends {{#if:[[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]]|[[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]]}}{{#if:[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]|{{#if:[[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]]| }}[[{{#varexists:meta_{{{pre_inherits}}}|Entity metadata}}#{{{pre_inherits}}}|{{{pre_inherits}}}]]}}.
           | Extends [[{{#varexists:meta_Animal|Entity metadata}}#Animal|Animal]].
       }}{{#if:17
           | {{#vardefine:meta_Armadillo|17}}
           {{#if:{{#varexists:meta_Animal}}|start_at in use when inherited entity Animal exists}}
           | {{#vardefine:meta_Armadillo|{{#var:meta_Animal|0}}}}
           {{#if:{{#varexists:meta_Animal}}||}}
       }}{{#if:17
           | {{#vardefine:meta_pre_Armadillo|17}}
           {{#if:{{#varexists:meta_Animal}}|start_at in use when inherited entity Animal exists}}
           | {{#vardefine:meta_pre_Armadillo|{{#var:meta_pre_Animal|0}}}}
           {{#if:{{#varexists:meta_Animal}}||}}
       }}
       | The base class.
       {{#vardefine:meta_Armadillo|17}}
       {{#vardefine:meta_pre_Armadillo|17}}
   }}

|

   {{#if:Animal
       | Extends Animal.
       {{#if:17
           | {{#vardefine:meta_Armadillo|17}}
           {{#if:{{#varexists:meta_Animal}}|start_at in use when inherited entity Animal exists}}
           | {{#vardefine:meta_Armadillo|{{#var:meta_Animal|0}}}}
           {{#if:{{#varexists:meta_Animal}}||}}
       }}
       | The base class.
       {{#vardefine:meta_Armadillo|17}}
   }}

}}

Index	Type	Meaning		Default
{{#vardefine:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}} {{#vardefine:pre_meta|{{#var:meta_pre_{{#var:meta_current_entity}}}}}} {{#switch:	added = {{#if:|}}{{#if:{{#var:pre_meta}}|{{#if:| }}{{#var:pre_meta}}}} {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}	removed = {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:|{{#if:{{#var:cur_meta}}| }}}} {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}}	= {{#ifeq: {{#var:cur_meta}}|{{#var:pre_meta}} | {{#var:cur_meta}} | {{#if:{{#var:cur_meta}}|{{#var:cur_meta}}}}{{#if:{{#var:pre_meta}}|{{#if:{{#var:cur_meta}}| }}{{#var:pre_meta}}}} }} {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}} {{#vardefine:meta_pre_{{#var:meta_current_entity}}|{{#expr:{{#var:pre_meta}}+1}}}}	#default = }}	{{#vardefineecho:cur_meta|{{#var:meta_{{#var:meta_current_entity}}}}}} {{#vardefine:meta_{{#var:meta_current_entity}}|{{#expr:{{#var:cur_meta}}+1}}}} {{#ifeq: |||}} }}	Armadillo State	Armadillo State		IDLE

Block Actions

No changes so far.

Inventories

No changes so far.

Plugin Channels

No changes so far.

Handshake

Serverbound

Handshake

This causes the server to switch into the target state.

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x00	Handshaking	Server	Protocol Version	VarInt	See protocol version numbers (currently 765 in Minecraft 1.20.4).
			Server Address	String (255)	Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect. The Notchian server does not use this information. Note that SRV records are a simple redirect, e.g. if _minecraft._tcp.example.com points to mc.example.org, users connecting to example.com will provide example.org as server address in addition to connecting to it.
			Server Port	Unsigned Short	Default is 25565. The Notchian server does not use this information.
			Next State	VarInt Enum	1 for Status, 2 for Login{{#if:|}}{{#if:, 3 for Transfer|{{#if:| }}, 3 for Transfer}}.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Cookie Request (login)

Requests a cookie that was previously stored.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x05	Login	Client	Key		Identifier		The identifier of the cookie.

Serverbound

Cookie Response (login)

Response to a Cookie Request (login) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x04	Login	Server	Key		Identifier		The identifier of the cookie.
			Has Payload		Boolean		The payload is only present if the cookie exists on the client.
			Payload		Optional ByteArray(5120)		The data of the cookie, if any.

Configuration

Clientbound

Cookie Request (configuration)

Requests a cookie that was previously stored.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x00	Configuration	Client	Key		Identifier		The identifier of the cookie.

Store Cookie (configuration)

Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x09	Configuration	Client	Key		Identifier		The identifier of the cookie.
			Payload		ByteArray(5120)		The data of the cookie.

Transfer (configuration)

Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x0A	Configuration	Client	Host		String		The hostname of IP of the server.
			Port		VarInt		The port of the server.

Serverbound

Cookie Response (configuration)

Response to a Cookie Request (configuration) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x01	Configuration	Server	Key		Identifier		The identifier of the cookie.
			Has Payload		Boolean		The payload is only present if the cookie exists on the client.
			Payload		Optional ByteArray(5120)		The data of the cookie, if any.

Play

Clientbound

Cookie Request (play)

Requests a cookie that was previously stored.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x16	Play	Client	Key		Identifier		The identifier of the cookie.

Store Cookie (play)

Stores some arbitrary data on the client, which persists between server transfers. The Notchian client only accepts cookies of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x6A	Play	Client	Key		Identifier		The identifier of the cookie.
			Payload		ByteArray(5120)		The data of the cookie.

Transfer (play)

Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x72	Play	Client	Host		String		The hostname of IP of the server.
			Port		VarInt		The port of the server.

Update Attributes

Sets attributes on the given entity.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x71	Play	Client	Entity ID		VarInt
			Number Of Properties		VarInt		Number of elements in the following array.
			Property	Key}}{{#if:Id|{{#if:Key| }}Id}}	Array	Identifier}}{{#if:VarInt Enum|{{#if:Identifier| }}VarInt Enum}}	See below.
				Value		Double	See below.
				Number Of Modifiers		VarInt	Number of elements in the following array.
				Modifiers		Array of Modifier Data	See Attribute#Modifiers. Modifier Data defined below.

Known Key values (see also Attribute#Modifiers):

Id	Key	Default	Min	Max	Label
0	generic.armor	0.0	0.0	30.0	Armor.
1	generic.armor_toughness	0.0	0.0	20.0	Armor Toughness.
2	generic.attack_damage	2.0	0.0	2048.0	Attack Damage.
3	generic.attack_knockback	0.0	0.0	5.0	Attack Knockback.
4	generic.attack_speed	4.0	0.0	1024.0	Attack Speed.
5	generic.block_interaction_range	4.5	0.0	64.0	Block Interaction Range.
6	generic.entity_interaction_range	3.0	0.0	64.0	Entity Interaction Range.
7	generic.flying_speed	0.4	0.0	1024.0	Flying Speed.
8	generic.follow_range	32.0	0.0	2048.0	Follow Range.
9	horse.jump_strength	0.7	0.0	2.0	Jump Strength.
10	generic.knockback_resistance	0.0	0.0	1.0	Knockback Resistance.
11	generic.luck	0.0	-1024.0	1024.0	Luck.
12	generic.max_absorption	0.0	0.0	2048.0	Max Absorption.
13	generic.max_health	20.0	1.0	1024.0	Max Health.
14	generic.movement_speed	0.7	0.0	1024.0	Movement Speed.
15	generic.scale	1.0	0.0625	16.0	Scale.
16	zombie.spawn_reinforcements	0.0	0.0	1.0	Spawn Reinforcements Chance.
17	generic.step_height	0.6	0.0	10.0	Step Height.

Modifier Data structure:

Field Name	Field Type	Notes
UUID	UUID
Amount	Double	May be positive or negative.
Operation	Byte	See below.

The operation controls how the base value of the modifier is changed.

• 0: Add/subtract amount
• 1: Add/subtract amount percent of the current value
• 2: Multiply by amount percent

All of the 0's are applied first, and then the 1's, and then the 2's.

Entity Effect

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x72	Play	Client	Entity ID	VarInt
			Effect ID	VarInt	See this table.
			Amplifier	Byte	Notchian client displays effect level as Amplifier + 1.
			Duration	VarInt	Duration in ticks. (-1 for infinite)
			Flags	Byte	Bit field, see below.
			Has Factor Data	Boolean	Used in DARKNESS effect
			Factor Codec	NBT Tag	See below

	The following information needs to be added to this page:
	What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?

Within flags:

• 0x01: Is ambient - was the effect spawned from a beacon? All beacon-generated effects are ambient. Ambient effects use a different icon in the HUD (blue border rather than gray). If all effects on an entity are ambient, the "Is potion effect ambient" living metadata field should be set to true. Usually should not be enabled.
• 0x02: Show particles - should all particles from this effect be hidden? Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory). Usually should be enabled.
• 0x04: Show icon - should the icon be displayed on the client? Usually should be enabled.
• {{#if:|}}{{#if:0x08: Blend - should the effect's hard-coded blending be applied? Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.|{{#if:| }}0x08: Blend - should the effect's hard-coded blending be applied? Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}

{{#if:Factor Data|Factor Data}}{{#if:|{{#if:Factor Data| }}}}

Name	Type	Notes
padding_duration	TAG_INT
factor_start	TAG_FLOAT
factor_target	TAG_FLOAT
factor_current	TAG_FLOAT
effect_changed_timestamp	TAG_INT
factor_previous_frame	TAG_FLOAT
had_effect_last_tick	TAG_BOOLEAN

Serverbound

Cookie Response (play)

Response to a Cookie Request (play) from the server. The Notchian server only accepts responses of up to 5 kiB in size.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x6A	Play	Server	Key		Identifier		The identifier of the cookie.
			Has Payload		Boolean		The payload is only present if the cookie exists on the client.
			Payload		Optional ByteArray(5120)		The data of the cookie, if any.