Difference between revisions of "Pre-release protocol"

Latest revision as of 22:19, 9 April 2024

This page documents the changes from the last stable Minecraft release (currently 1.20.4, protocol 765) to the current pre-release (currently 24w13a, protocol Snapshot 182). 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.

1 Contents
- 1.1 Data types
- 1.2 Packets
2 New/modified data types
3 Entity Metadata
4 Block Actions
5 Inventories
6 Plugin Channels
7 Handshake
- 7.1 Serverbound
  - 7.1.1 Handshake
8 Status
- 8.1 Clientbound
- 8.2 Serverbound
9 Login
- 9.1 Clientbound
  - 9.1.1 Encryption Request
  - 9.1.2 Cookie Request (login)
- 9.2 Serverbound
  - 9.2.1 Cookie Response (login)
10 Configuration
- 10.1 Clientbound
- 10.2 Serverbound
  - 10.2.1 Cookie Response (configuration)
  - 10.2.2 Serverbound Known Packs
11 Play
- 11.1 Clientbound
- 11.2 Serverbound

Data types

No changes so far.

Packets

ID	Packet name	Documentation
Handshake serverbound
0x00	Handshake	Current	Pre
Login clientbound
0x01	Encryption Request	Current	Pre
0x05	Cookie Request (login)		Pre
Login serverbound
0x04	Cookie Response (login)		Pre
Configuration clientbound
0x00	Cookie Request (configuration)		Pre
~~0x00~~ 0x01	Clientbound Plugin Message (configuration)	Current	(unchanged)
~~0x01~~ 0x02	Disconnect (configuration)	Current	(unchanged)
~~0x02~~ 0x03	Finish Configuration	Current	(unchanged)
~~0x03~~ 0x04	Clientbound Keep Alive (configuration)	Current	(unchanged)
~~0x04~~ 0x05	Ping (configuration)	Current	(unchanged)
0x06	Reset Chat		Pre
~~0x05~~ 0x07	Registry Data	Current	Pre
~~0x06~~ 0x08	Remove Resource Pack (configuration)	Current	(unchanged)
~~0x07~~ 0x09	Add Resource Pack (configuration)	Current	(unchanged)
0x0A	Store Cookie (configuration)		Pre
0x0B	Transfer (configuration)		Pre
~~0x08~~ 0x0C	Feature Flags	Current	(unchanged)
~~0x09~~ 0x0D	Update Tags (configuration)	Current	(unchanged)
0x0E	Clientbound Known Packs		Pre
Configuration serverbound
0x01	Cookie Response (configuration)		Pre
~~0x01~~ 0x02	Serverbound Plugin Message (configuration)	Current	(unchanged)
~~0x02~~ 0x03	Finish Configuration	Current	(unchanged)
~~0x03~~ 0x04	Serverbound Keep Alive (configuration)	Current	(unchanged)
~~0x04~~ 0x05	Pong (configuration)	Current	(unchanged)
~~0x05~~ 0x06	Resource Pack Response (configuration)	Current	(unchanged)
0x07	Serverbound Known Packs		Pre
Play clientbound
0x16	Cookie Request (Play)		Pre
~~0x16~~ 0x17	Set Cooldown	Current	(unchanged)
~~0x17~~ 0x18	Chat Suggestions	Current	(unchanged)
~~0x18~~ 0x19	Clientbound Plugin Message (play)	Current	(unchanged)
~~0x19~~ 0x1A	Damage Event	Current	(unchanged)
0x1B	Debug Sample		Pre
~~0x1A~~ 0x1C	Delete Message	Current	(unchanged)
~~0x1B~~ 0x1D	Disconnect (play)	Current	(unchanged)
~~0x1C~~ 0x1E	Disguised Chat Message	Current	(unchanged)
~~0x1D~~ 0x1F	Entity Event	Current	(unchanged)
~~0x1E~~ 0x20	Explosion	Current	(unchanged)
~~0x1F~~ 0x21	Unload Chunk	Current	(unchanged)
~~0x20~~ 0x22	Game Event	Current	(unchanged)
~~0x21~~ 0x23	Open Horse Screen	Current	(unchanged)
~~0x22~~ 0x24	Hurt Animation	Current	(unchanged)
~~0x23~~ 0x25	Initialize World Border	Current	(unchanged)
~~0x24~~ 0x26	Clientbound Keep Alive (play)	Current	(unchanged)
~~0x25~~ 0x27	Chunk Data and Update Light	Current	(unchanged)
~~0x26~~ 0x28	World Event	Current	(unchanged)
~~0x27~~ 0x29	Particle	Current	(unchanged)
~~0x28~~ 0x2A	Update Light	Current	(unchanged)
~~0x29~~ 0x2B	Login (play)	Current	Pre
~~0x2A~~ 0x2C	Map Data	Current	(unchanged)
~~0x2B~~ 0x2D	Merchant Offers	Current	(unchanged)
~~0x2C~~ 0x2E	Update Entity Position	Current	(unchanged)
~~0x2D~~ 0x2F	Update Entity Position and Rotation	Current	(unchanged)
~~0x2E~~ 0x30	Update Entity Rotation	Current	(unchanged)
~~0x2F~~ 0x31	Move Vehicle	Current	(unchanged)
~~0x30~~ 0x32	Open Book	Current	(unchanged)
~~0x31~~ 0x33	Open Screen	Current	(unchanged)
~~0x32~~ 0x34	Open Sign Editor	Current	(unchanged)
~~0x33~~ 0x35	Ping (play)	Current	(unchanged)
~~0x34~~ 0x36	Ping Response (play)	Current	(unchanged)
~~0x35~~ 0x37	Place Ghost Recipe	Current	(unchanged)
~~0x36~~ 0x38	Player Abilities	Current	(unchanged)
~~0x37~~ 0x39	Player Chat Message	Current	(unchanged)
~~0x38~~ 0x3A	End Combat	Current	(unchanged)
~~0x39~~ 0x3B	Enter Combat	Current	(unchanged)
~~0x3A~~ 0x3C	Combat Death	Current	(unchanged)
~~0x3B~~ 0x3D	Player Info Remove	Current	(unchanged)
~~0x3C~~ 0x3E	Player Info Update	Current	(unchanged)
~~0x3D~~ 0x3F	Look At	Current	(unchanged)
~~0x3E~~ 0x40	Synchronize Player Position	Current	(unchanged)
~~0x3F~~ 0x41	Update Recipe Book	Current	(unchanged)
~~0x40~~ 0x42	Remove Entities	Current	(unchanged)
~~0x41~~ 0x43	Remove Entity Effect	Current	(unchanged)
~~0x42~~ 0x44	Reset Score	Current	(unchanged)
~~0x43~~ 0x45	Remove Resource Pack (play)	Current	(unchanged)
~~0x44~~ 0x46	Add Resource Pack (play)	Current	(unchanged)
~~0x45~~ 0x47	Respawn	Current	Pre
~~0x46~~ 0x48	Set Head Rotation	Current	(unchanged)
~~0x47~~ 0x49	Update Section Blocks	Current	(unchanged)
~~0x48~~ 0x4A	Select Advancements Tab	Current	(unchanged)
~~0x49~~ 0x4B	Server Data	Current	(unchanged)
~~0x4A~~ 0x4C	Set Action Bar Text	Current	(unchanged)
~~0x4B~~ 0x4D	Set Border Center	Current	(unchanged)
~~0x4C~~ 0x4E	Set Border Lerp Size	Current	(unchanged)
~~0x4D~~ 0x4F	Set Border Size	Current	(unchanged)
~~0x4E~~ 0x50	Set Border Warning Delay	Current	(unchanged)
~~0x4F~~ 0x51	Set Border Warning Distance	Current	(unchanged)
~~0x50~~ 0x52	Set Camera	Current	(unchanged)
~~0x51~~ 0x53	Set Held Item	Current	(unchanged)
~~0x52~~ 0x54	Set Center Chunk	Current	(unchanged)
~~0x53~~ 0x55	Set Render Distance	Current	(unchanged)
~~0x54~~ 0x56	Set Default Spawn Position	Current	(unchanged)
~~0x55~~ 0x57	Display Objective	Current	(unchanged)
~~0x56~~ 0x58	Set Entity Metadata	Current	(unchanged)
~~0x57~~ 0x59	Link Entities	Current	(unchanged)
~~0x58~~ 0x5A	Set Entity Velocity	Current	(unchanged)
~~0x59~~ 0x5B	Set Equipment	Current	(unchanged)
~~0x5A~~ 0x5C	Set Experience	Current	(unchanged)
~~0x5B~~ 0x5D	Set Health	Current	(unchanged)
~~0x5C~~ 0x5E	Update Objectives	Current	(unchanged)
~~0x5D~~ 0x5F	Set Passengers	Current	(unchanged)
~~0x5E~~ 0x60	Update Teams	Current	(unchanged)
~~0x5F~~ 0x61	Update Score	Current	(unchanged)
~~0x60~~ 0x62	Set Simulation Distance	Current	(unchanged)
~~0x61~~ 0x63	Set Subtitle Text	Current	(unchanged)
~~0x62~~ 0x64	Update Time	Current	(unchanged)
~~0x63~~ 0x65	Set Title Text	Current	(unchanged)
~~0x64~~ 0x66	Set Title Animation Times	Current	(unchanged)
~~0x65~~ 0x67	Entity Sound Effect	Current	(unchanged)
~~0x66~~ 0x68	Sound Effect	Current	(unchanged)
~~0x67~~ 0x69	Start Configuration	Current	(unchanged)
~~0x68~~ 0x6A	Stop Sound	Current	(unchanged)
0x6B	Store Cookie (Play)		Pre
~~0x69~~ 0x6C	System Chat Message	Current	(unchanged)
~~0x6A~~ 0x6D	Set Tab List Header And Footer	Current	(unchanged)
~~0x6B~~ 0x6E	Tag Query Response	Current	(unchanged)
~~0x6C~~ 0x6F	Pickup Item	Current	(unchanged)
~~0x6D~~ 0x70	Teleport Entity	Current	(unchanged)
~~0x6E~~ 0x71	Set Ticking State	Current	(unchanged)
~~0x6F~~ 0x72	Step Tick	Current	(unchanged)
0x73	Transfer (Play)		Pre
~~0x70~~ 0x74	Update Advancements	Current	(unchanged)
~~0x71~~ 0x75	Update Attributes	Current	Pre
~~0x72~~ 0x76	Entity Effect	Current	Pre
~~0x73~~ 0x77	Update Recipes	Current	(unchanged)
~~0x74~~ 0x78	Update Tags (play)	Current	(unchanged)
Play serverbound
0x04	Chat Command	Current	Pre
0x05	Signed Chat Command		Pre
~~0x05~~ 0x06	Chat Message	Current	(unchanged)
~~0x06~~ 0x07	Player Session	Current	(unchanged)
~~0x07~~ 0x08	Chunk Batch Received	Current	(unchanged)
~~0x08~~ 0x09	Client Status	Current	(unchanged)
~~0x09~~ 0x0A	Client Information (play)	Current	(unchanged)
~~0x0A~~ 0x0B	Command Suggestions Request	Current	(unchanged)
~~0x0B~~ 0x0C	Acknowledge Configuration	Current	(unchanged)
~~0x0C~~ 0x0D	Click Container Button	Current	(unchanged)
~~0x0D~~ 0x0E	Click Container	Current	(unchanged)
~~0x0E~~ 0x0F	Close Container	Current	(unchanged)
~~0x0F~~ 0x10	Change Container Slot State	Current	(unchanged)
0x11	Cookie Response (play)		Pre
~~0x10~~ 0x12	Serverbound Plugin Message (play)	Current	(unchanged)
0x13	Debug Sample Subscription		Pre
~~0x11~~ 0x14	Edit Book	Current	(unchanged)
~~0x12~~ 0x15	Query Entity Tag	Current	(unchanged)
~~0x13~~ 0x16	Interact	Current	(unchanged)
~~0x14~~ 0x17	Jigsaw Generate	Current	(unchanged)
~~0x15~~ 0x18	Serverbound Keep Alive (play)	Current	(unchanged)
~~0x16~~ 0x19	Lock Difficulty	Current	(unchanged)
~~0x17~~ 0x1A	Set Player Position	Current	(unchanged)
~~0x18~~ 0x1B	Set Player Position and Rotation	Current	(unchanged)
~~0x19~~ 0x1C	Set Player Rotation	Current	(unchanged)
~~0x1A~~ 0x1D	Set Player On Ground	Current	(unchanged)
~~0x1B~~ 0x1E	Move Vehicle	Current	(unchanged)
~~0x1C~~ 0x1F	Paddle Boat	Current	(unchanged)
~~0x1D~~ 0x20	Pick Item	Current	(unchanged)
~~0x1E~~ 0x21	Ping Request (play)	Current	(unchanged)
~~0x1F~~ 0x22	Place Recipe	Current	(unchanged)
~~0x20~~ 0x23	Player Abilities	Current	(unchanged)
~~0x21~~ 0x24	Player Action	Current	(unchanged)
~~0x22~~ 0x25	Player Command	Current	(unchanged)
~~0x23~~ 0x26	Player Input	Current	(unchanged)
~~0x24~~ 0x27	Pong (play)	Current	(unchanged)
~~0x25~~ 0x28	Change Recipe Book Settings	Current	(unchanged)
~~0x26~~ 0x29	Set Seen Recipe	Current	(unchanged)
~~0x27~~ 0x2A	Rename Item	Current	(unchanged)
~~0x28~~ 0x2B	Resource Pack Response (play)	Current	(unchanged)
~~0x29~~ 0x2C	Seen Advancements	Current	(unchanged)
~~0x2A~~ 0x2D	Select Trade	Current	(unchanged)
~~0x2B~~ 0x2E	Set Beacon Effect	Current	(unchanged)
~~0x2C~~ 0x2F	Set Held Item	Current	(unchanged)
~~0x2D~~ 0x30	Program Command Block	Current	(unchanged)
~~0x2E~~ 0x31	Program Command Block Minecart	Current	(unchanged)
~~0x2F~~ 0x32	Set Creative Mode Slot	Current	(unchanged)
~~0x30~~ 0x33	Program Jigsaw Block	Current	(unchanged)
~~0x31~~ 0x34	Program Structure Block	Current	(unchanged)
~~0x32~~ 0x35	Update Sign	Current	(unchanged)
~~0x33~~ 0x36	Swing Arm	Current	(unchanged)
~~0x34~~ 0x37	Teleport To Entity	Current	(unchanged)
~~0x35~~ 0x38	Use Item On	Current	(unchanged)
~~0x36~~ 0x39	Use Item	Current	(unchanged)

New/modified data types

No changes so far.

Entity Metadata

Type	Name	Value	Notes
0	Byte	Byte
1	VarInt	VarInt
2	VarLong	VarLong
3	Float	Float
4	String	String
5	Text Component	Text Component
6	Optional Text Component	(Boolean, Optional Text Component)	Text Component is present if the Boolean is set to true.
7	Slot	Slot
8	Boolean	Boolean
9	Rotations	(Float, Float, Float)	rotation on x, rotation on y, rotation on z
10	Position	Position
11	Optional Position	(Boolean, Optional Position)	Position is present if the Boolean is set to true.
12	Direction	VarInt Enum	Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
13	Optional UUID	(Boolean, Optional UUID)	UUID is present if the Boolean is set to true.
14	Block State	VarInt	An ID in the block state registry.
15	Optional Block State	VarInt	0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
16	NBT	NBT
17	Particle	(VarInt, Varies)	particle type (an ID in the `minecraft:particle_type` registry), particle data (See Particles.)
18	Particles	(VarInt, Array of Particle)	length of array, particle data (See directly above.)
18 19	Villager Data	(VarInt, VarInt, VarInt)	villager type, villager profession, level (See below.)
19 20	Optional VarInt	VarInt	0 for absent; 1 + actual value otherwise. Used for entity IDs.
20 21	Pose	VarInt Enum	STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14, SLIDING = 15, SHOOTING = 16, INHALING = 17
21 22	Cat Variant	VarInt	An ID in the `minecraft:cat_variant` registry.
22 23	Wolf Variant	VarInt	An ID in the `minecraft:wolf_variant` registry.
22 24	Frog Variant	VarInt	An ID in the `minecraft:frog_variant` registry.
23 25	Optional Global Position	(Boolean, Optional Identifier, Optional Position)	dimension identifier, position; only if the Boolean is set to true.
24 26	Painting Variant	VarInt	An ID in the `minecraft:painting_variant` registry.
25 27	Sniffer State	VarInt Enum	IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
26 28	Armadillo State	VarInt Enum	IDLE = 0, ROLLING = 1, SCARED = 2
26 29	Vector3	(Float, Float, Float)	x, y, z
27 30	Quaternion	(Float, Float, Float, Float)	x, y, z, w

Living Entity

TODO: This has changed to use the PARTICLES attribute

Wolf

Extends Tameable Animal.Inherited entity Tameable Animal does not existInherited entity Tameable Animal does not exist

Index	Type	Meaning	Default
0	Wolf Variant (22 23)	Wolf Variant	PALE
1	Boolean (8)	Is begging	false
2	VarInt (1)	Collar color (values are those used with dyes)	14 (Red)
3	VarInt (1)	Anger time	0

Armadillo

Extends Animal.

Index	Type	Meaning		Default
17	Armadillo State (26 28)	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, 3 for Transfer.

Status

Clientbound

No changes so far.

Serverbound

No changes so far.

Login

Clientbound

Encryption Request

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x01	Login	Client	Server ID	String (20)	Appears to be empty.
			Public Key Length	VarInt	Length of Public Key.
			Public Key	Byte Array	The server's public key, in bytes.
			Verify Token Length	VarInt	Length of Verify Token. Always 4 for Notchian servers.
			Verify Token	Byte Array	A sequence of random bytes generated by the server.
			Should Authenticate	Boolean

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 Length	VarInt	Length of the following byte array.
			Payload	Optional Byte Array (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.

Reset Chat

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x06	Configuration	Client	no fields

Registry Data

Represents certain registries that are sent from the server and are applied on the client. The packet is sent for each of the following registries: minecraft:worldgen/biome, minecraft:chat_type, minecraft:trim_pattern, minecraft:trim_material, minecraft:wolf_variant, minecraft:dimension_type, minecraft:damage_type, and minecraft:banner_pattern.

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x07	Configuration	Client	Registry Codec		NBT (Compound)		See Registry Data.
			Registry ID		Identifier
			Entry Count		VarInt		Number of entries in the following array.
			Entries	Entry ID	Array	Identifier
				Has Data		Boolean	Whether the entry has any data following.
				Data		NBT Tag	Entry data. Only present if Has Data is true.

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
0x0A	Configuration	Client	Key		Identifier		The identifier of the cookie.
0x0A	Configuration	Client	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
0x0B	Configuration	Client	Host		String		The hostname of IP of the server.
0x0B	Configuration	Client	Port		VarInt		The port of the server.

Clientbound Known Packs

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x0E	Configuration	Client	Known Pack Count		VarInt		The number of known packs in the following array.
			Known Packs	Namespace	Array	String
				ID		String
				Version		String

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 Length	VarInt	Length of the following byte array.
			Payload	Optional Byte Array (5120)	The data of the cookie, if any.

Serverbound Known Packs

ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.

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.

Debug Sample

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x1B	Play	Client	Sample Length	VarInt	The length of the following array.
			Sample	Long Array	TODO: What is the structure of the data in this array?
			Sample Type	VarInt Enum	The type of sample data. Currently always 0 (TICK_TIME).

Login (play)

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x2B	Play	Client	Entity ID	Int	The player's Entity ID (EID).
			Is hardcore	Boolean
			Dimension Count	VarInt	Size of the following array.
			Dimension Names	Array of Identifier	Identifiers for all dimensions on the server.
			Max Players	VarInt	Was once used by the client to draw the player list, but now is ignored.
			View Distance	VarInt	Render distance (2-32).
			Simulation Distance	VarInt	The distance that the client will process specific things, such as entities.
			Reduced Debug Info	Boolean	If true, a Notchian client shows reduced information on the debug screen. For servers in development, this should almost always be false.
			Enable respawn screen	Boolean	Set to false when the doImmediateRespawn gamerule is true.
			Do limited crafting	Boolean	Whether players can only craft recipes they have already unlocked. Currently unused by the client.
			Dimension Type	~~Identifier~~ VarInt	The ID of the type of dimension in the `minecraft:dimension_type` registry, defined by the Registry Data packet.
			Dimension Name	Identifier	Name of the dimension being spawned into.
			Hashed seed	Long	First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
			Game mode	Unsigned Byte	0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
			Previous Game mode	Byte	-1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
			Is Debug	Boolean	True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks.
			Is Flat	Boolean	True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
			Has death location	Boolean	If true, then the next two fields are present.
			Death dimension name	Optional Identifier	Name of the dimension the player died in.
			Death location	Optional Position	The location that the player died at.
			Portal cooldown	VarInt	The number of ticks until the player can use the portal again.
			Enforces Secure Chat	Boolean

Respawn

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x47	Play	Client	Dimension Type	~~Identifier~~ VarInt	The ID of the type of dimension in the `minecraft:dimension_type` registry, defined by the Registry Data packet.
			Dimension Name	Identifier	Name of the dimension being spawned into.
			Hashed seed	Long	First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
			Game mode	Unsigned Byte	0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
			Previous Game mode	Byte	-1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
			Is Debug	Boolean	True if the world is a debug mode world; debug mode worlds cannot be modified and have predefined blocks.
			Is Flat	Boolean	True if the world is a superflat world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
			Has death location	Boolean	If true, then the next two fields are present.
			Death dimension Name	Optional Identifier	Name of the dimension the player died in.
			Death location	Optional Position	The location that the player died at.
			Portal cooldown	VarInt	The number of ticks until the player can use the portal again.
			Data kept	Byte	Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned. In the Notchian implementation, this is context dependent: normal respawns (after death) keep no data; exiting the end poem/credits keeps the attributes; other dimension changes (portals or teleports) keep all data.

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
0x6B	Play	Client	Key	Identifier	The identifier of the cookie.
			Payload Length	VarInt	Length of the following byte array.
			Payload	Byte Array (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
0x73	Play	Client	Host		String		The hostname of IP of the server.
0x73	Play	Client	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~~ Id	Array	~~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):

These changed between 24w03b and 24w13a, TODO: Update this

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.
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.

~~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

Chat Command

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x04	Play	Server	Command		String (256)		The command typed by the client.
			Timestamp		Long		The timestamp that the command was executed.
			Salt		Long		The salt for the following argument signatures.
			Array length		VarInt		Number of entries in the following array. The maximum length in Notchian server is 8.
			Array of argument signatures	Argument name	Array (8)	String (16)	The name of the argument that is signed by the following signature.
			Array of argument signatures	Signature	Array (8)	Byte Array (256)	The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
			Message Count		VarInt
			Acknowledged		Fixed BitSet (20)

Signed Chat Command

Packet ID	State	Bound To	Field Name		Field Type		Notes
0x05	Play	Server	Command		String(256)		The command typed by the client.
			Timestamp		Long		The timestamp that the command was executed. Milliseconds since the Unix epoch.
			Salt		Long		The salt for the following argument signatures.
			Argument Signature Count		VarInt		Number of elements in the following array. The maximum length in Notchian server is 8.
			Argument Signatures	Name	Array	String(16)	The name of the argument that is signed by the following signature.
			Argument Signatures	Signature	Array	ByteArray(256)	The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
			Seen Messages Offset		VarInt
			Seen Messages Acknowledged		Fixed BitSet(20)

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
0x11	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 Length	Optional VarInt	Length of the following byte array.
			Payload	Optional Byte Array (5120)	The data of the cookie, if any.

Debug Sample Subscription

Packet ID	State	Bound To	Field Name	Field Type	Notes
0x13	Play	Server	Sample Type	VarInt Enum	The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).

@@ Line 1: / Line 1: @@
-This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.10.2, protocol 210]]) to the current pre-release (currently [[Protocol version numbers|16w39c, protocol 309]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w13a, protocol {{Snapshot PVN|1073742006}}]]). 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.
@@ Line 12: / Line 12: @@
 === Packets ===
-No changes so far.
 {| class="wikitable"
@@ Line 20: / Line 18: @@
   !colspan="2"| Documentation
   |-
-  !colspan="4"| Handshaking serverbound
+  !colspan="4"| Handshake serverbound
   {{PacketList|0x00|Handshake}}
+ |-
+ !colspan="4"| Login clientbound
+ {{PacketList|0x01|Encryption Request}}
+ {{PacketList|0x05|Cookie Request (login)|rel=added}}
+ |-
+ !colspan="4"| Login serverbound
+ {{PacketList|0x04|Cookie Response (login)|rel=added}}
+ |-
+ !colspan="4"| Configuration clientbound
+ {{PacketList|0x00|Cookie Request (configuration)|rel=added}}
+ {{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x03|0x04}}|Clientbound Keep Alive (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x04|0x05}}|Ping (configuration)|pre=unchanged}}
+ {{PacketList|0x06|Reset Chat|rel=added}}
+ {{PacketList|{{change|0x05|0x07}}|Registry Data}}
+ {{PacketList|{{change|0x06|0x08}}|Remove Resource Pack (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x07|0x09}}|Add Resource Pack (configuration)|pre=unchanged}}
+ {{PacketList|0x0A|Store Cookie (configuration)|rel=added}}
+ {{PacketList|0x0B|Transfer (configuration)|rel=added}}
+ {{PacketList|{{change|0x08|0x0C}}|Feature Flags|pre=unchanged}}
+ {{PacketList|{{change|0x09|0x0D}}|Update Tags (configuration)|pre=unchanged}}
+ {{PacketList|0x0E|Clientbound Known Packs|rel=added}}
+ |-
+ !colspan="4"| Configuration serverbound
+ {{PacketList|0x01|Cookie Response (configuration)|rel=added}}
+ {{PacketList|{{change|0x01|0x02}}|Serverbound Plugin Message (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x02|0x03}}|Finish Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x03|0x04}}|Serverbound Keep Alive (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x04|0x05}}|Pong (configuration)|pre=unchanged}}
+ {{PacketList|{{change|0x05|0x06}}|Resource Pack Response (configuration)|pre=unchanged}}
+ {{PacketList|0x07|Serverbound Known Packs|rel=added}}
   |-
   !colspan="4"| Play clientbound
-  {{PacketList|0x03|Spawn Mob}}
+  {{PacketList|0x16|Cookie Request (Play)|rel=added}}
-  {{PacketList|0x0E|Tab-Complete (clientbound)}}
+ {{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
-  {{PacketList|0x1B|Entity Status}}
+ {{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
-  {{PacketList|0x24|Map}}
+  {{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
-  {{PacketList|0x48|Collect Item}}
+  {{PacketList|{{change|0x19|0x1A}}|Damage Event|pre=unchanged}}
+ {{PacketList|0x1B|Debug Sample|rel=added}}
+ {{PacketList|{{change|0x1A|0x1C}}|Delete Message|pre=unchanged}}
+ {{PacketList|{{change|0x1B|0x1D}}|Disconnect (play)|pre=unchanged}}
+ {{PacketList|{{change|0x1C|0x1E}}|Disguised Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x1D|0x1F}}|Entity Event|pre=unchanged}}
+ {{PacketList|{{change|0x1E|0x20}}|Explosion|pre=unchanged}}
+ {{PacketList|{{change|0x1F|0x21}}|Unload Chunk|pre=unchanged}}
+ {{PacketList|{{change|0x20|0x22}}|Game Event|pre=unchanged}}
+ {{PacketList|{{change|0x21|0x23}}|Open Horse Screen|pre=unchanged}}
+ {{PacketList|{{change|0x22|0x24}}|Hurt Animation|pre=unchanged}}
+  {{PacketList|{{change|0x23|0x25}}|Initialize World Border|pre=unchanged}}
+ {{PacketList|{{change|0x24|0x26}}|Clientbound Keep Alive (play)|pre=unchanged}}
+ {{PacketList|{{change|0x25|0x27}}|Chunk Data and Update Light|pre=unchanged}}
+ {{PacketList|{{change|0x26|0x28}}|World Event|pre=unchanged}}
+ {{PacketList|{{change|0x27|0x29}}|Particle|pre=unchanged}}
+ {{PacketList|{{change|0x28|0x2A}}|Update Light|pre=unchanged}}
+ {{PacketList|{{change|0x29|0x2B}}|Login (play)}}
+ {{PacketList|{{change|0x2A|0x2C}}|Map Data|pre=unchanged}}
+ {{PacketList|{{change|0x2B|0x2D}}|Merchant Offers|pre=unchanged}}
+ {{PacketList|{{change|0x2C|0x2E}}|Update Entity Position|pre=unchanged}}
+ {{PacketList|{{change|0x2D|0x2F}}|Update Entity Position and Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x2E|0x30}}|Update Entity Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x2F|0x31}}|Move Vehicle|pre=unchanged}}
+ {{PacketList|{{change|0x30|0x32}}|Open Book|pre=unchanged}}
+ {{PacketList|{{change|0x31|0x33}}|Open Screen|pre=unchanged}}
+ {{PacketList|{{change|0x32|0x34}}|Open Sign Editor|pre=unchanged}}
+ {{PacketList|{{change|0x33|0x35}}|Ping (play)|pre=unchanged}}
+ {{PacketList|{{change|0x34|0x36}}|Ping Response (play)|pre=unchanged}}
+ {{PacketList|{{change|0x35|0x37}}|Place Ghost Recipe|pre=unchanged}}
+ {{PacketList|{{change|0x36|0x38}}|Player Abilities|pre=unchanged}}
+ {{PacketList|{{change|0x37|0x39}}|Player Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x38|0x3A}}|End Combat|pre=unchanged}}
+ {{PacketList|{{change|0x39|0x3B}}|Enter Combat|pre=unchanged}}
+ {{PacketList|{{change|0x3A|0x3C}}|Combat Death|pre=unchanged}}
+ {{PacketList|{{change|0x3B|0x3D}}|Player Info Remove|pre=unchanged}}
+ {{PacketList|{{change|0x3C|0x3E}}|Player Info Update|pre=unchanged}}
+ {{PacketList|{{change|0x3D|0x3F}}|Look At|pre=unchanged}}
+ {{PacketList|{{change|0x3E|0x40}}|Synchronize Player Position|pre=unchanged}}
+ {{PacketList|{{change|0x3F|0x41}}|Update Recipe Book|pre=unchanged}}
+ {{PacketList|{{change|0x40|0x42}}|Remove Entities|pre=unchanged}}
+  {{PacketList|{{change|0x41|0x43}}|Remove Entity Effect|pre=unchanged}}
+ {{PacketList|{{change|0x42|0x44}}|Reset Score|pre=unchanged}}
+ {{PacketList|{{change|0x43|0x45}}|Remove Resource Pack (play)|pre=unchanged}}
+ {{PacketList|{{change|0x44|0x46}}|Add Resource Pack (play)|pre=unchanged}}
+ {{PacketList|{{change|0x45|0x47}}|Respawn}}
+ {{PacketList|{{change|0x46|0x48}}|Set Head Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x47|0x49}}|Update Section Blocks|pre=unchanged}}
+ {{PacketList|{{change|0x48|0x4A}}|Select Advancements Tab|pre=unchanged}}
+ {{PacketList|{{change|0x49|0x4B}}|Server Data|pre=unchanged}}
+ {{PacketList|{{change|0x4A|0x4C}}|Set Action Bar Text|pre=unchanged}}
+ {{PacketList|{{change|0x4B|0x4D}}|Set Border Center|pre=unchanged}}
+ {{PacketList|{{change|0x4C|0x4E}}|Set Border Lerp Size|pre=unchanged}}
+ {{PacketList|{{change|0x4D|0x4F}}|Set Border Size|pre=unchanged}}
+ {{PacketList|{{change|0x4E|0x50}}|Set Border Warning Delay|pre=unchanged}}
+ {{PacketList|{{change|0x4F|0x51}}|Set Border Warning Distance|pre=unchanged}}
+ {{PacketList|{{change|0x50|0x52}}|Set Camera|pre=unchanged}}
+ {{PacketList|{{change|0x51|0x53}}|Set Held Item|pre=unchanged}}
+ {{PacketList|{{change|0x52|0x54}}|Set Center Chunk|pre=unchanged}}
+ {{PacketList|{{change|0x53|0x55}}|Set Render Distance|pre=unchanged}}
+ {{PacketList|{{change|0x54|0x56}}|Set Default Spawn Position|pre=unchanged}}
+ {{PacketList|{{change|0x55|0x57}}|Display Objective|pre=unchanged}}
+ {{PacketList|{{change|0x56|0x58}}|Set Entity Metadata|pre=unchanged}}
+ {{PacketList|{{change|0x57|0x59}}|Link Entities|pre=unchanged}}
+ {{PacketList|{{change|0x58|0x5A}}|Set Entity Velocity|pre=unchanged}}
+ {{PacketList|{{change|0x59|0x5B}}|Set Equipment|pre=unchanged}}
+ {{PacketList|{{change|0x5A|0x5C}}|Set Experience|pre=unchanged}}
+ {{PacketList|{{change|0x5B|0x5D}}|Set Health|pre=unchanged}}
+ {{PacketList|{{change|0x5C|0x5E}}|Update Objectives|pre=unchanged}}
+ {{PacketList|{{change|0x5D|0x5F}}|Set Passengers|pre=unchanged}}
+ {{PacketList|{{change|0x5E|0x60}}|Update Teams|pre=unchanged}}
+ {{PacketList|{{change|0x5F|0x61}}|Update Score|pre=unchanged}}
+ {{PacketList|{{change|0x60|0x62}}|Set Simulation Distance|pre=unchanged}}
+ {{PacketList|{{change|0x61|0x63}}|Set Subtitle Text|pre=unchanged}}
+ {{PacketList|{{change|0x62|0x64}}|Update Time|pre=unchanged}}
+ {{PacketList|{{change|0x63|0x65}}|Set Title Text|pre=unchanged}}
+ {{PacketList|{{change|0x64|0x66}}|Set Title Animation Times|pre=unchanged}}
+ {{PacketList|{{change|0x65|0x67}}|Entity Sound Effect|pre=unchanged}}
+ {{PacketList|{{change|0x66|0x68}}|Sound Effect|pre=unchanged}}
+ {{PacketList|{{change|0x67|0x69}}|Start Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x68|0x6A}}|Stop Sound|pre=unchanged}}
+ {{PacketList|0x6B|Store Cookie (Play)|rel=added}}
+ {{PacketList|{{change|0x69|0x6C}}|System Chat Message|pre=unchanged}}
+ {{PacketList|{{change|0x6A|0x6D}}|Set Tab List Header And Footer|pre=unchanged}}
+ {{PacketList|{{change|0x6B|0x6E}}|Tag Query Response|pre=unchanged}}
+ {{PacketList|{{change|0x6C|0x6F}}|Pickup Item|pre=unchanged}}
+ {{PacketList|{{change|0x6D|0x70}}|Teleport Entity|pre=unchanged}}
+ {{PacketList|{{change|0x6E|0x71}}|Set Ticking State|pre=unchanged}}
+ {{PacketList|{{change|0x6F|0x72}}|Step Tick|pre=unchanged}}
+ {{PacketList|0x73|Transfer (Play)|rel=added}}
+ {{PacketList|{{change|0x70|0x74}}|Update Advancements|pre=unchanged}}
+ {{PacketList|{{change|0x71|0x75}}|Update Attributes}}
+ {{PacketList|{{change|0x72|0x76}}|Entity Effect}}
+ {{PacketList|{{change|0x73|0x77}}|Update Recipes|pre=unchanged}}
+ {{PacketList|{{change|0x74|0x78}}|Update Tags (play)|pre=unchanged}}
   |-
   !colspan="4"| Play serverbound
-  {{PacketList|0x02|Chat Message (serverbound)}}
+  {{PacketList|0x04|Chat Command}}
-  {{PacketList|0x1C|Player Block Placement)}}
+ {{PacketList|0x05|Signed Chat Command|rel=added}}
-  |-
+ {{PacketList|{{change|0x05|0x06}}|Chat Message|pre=unchanged}}
-|}
+ {{PacketList|{{change|0x06|0x07}}|Player Session|pre=unchanged}}
+ {{PacketList|{{change|0x07|0x08}}|Chunk Batch Received|pre=unchanged}}
+ {{PacketList|{{change|0x08|0x09}}|Client Status|pre=unchanged}}
+ {{PacketList|{{change|0x09|0x0A}}|Client Information (play)|pre=unchanged}}
+ {{PacketList|{{change|0x0A|0x0B}}|Command Suggestions Request|pre=unchanged}}
+ {{PacketList|{{change|0x0B|0x0C}}|Acknowledge Configuration|pre=unchanged}}
+ {{PacketList|{{change|0x0C|0x0D}}|Click Container Button|pre=unchanged}}
+ {{PacketList|{{change|0x0D|0x0E}}|Click Container|pre=unchanged}}
+ {{PacketList|{{change|0x0E|0x0F}}|Close Container|pre=unchanged}}
+ {{PacketList|{{change|0x0F|0x10}}|Change Container Slot State|pre=unchanged}}
+ {{PacketList|0x11|Cookie Response (play)|rel=added}}
+ {{PacketList|{{change|0x10|0x12}}|Serverbound Plugin Message (play)|pre=unchanged}}
+ {{PacketList|0x13|Debug Sample Subscription|rel=added}}
+ {{PacketList|{{change|0x11|0x14}}|Edit Book|pre=unchanged}}
+ {{PacketList|{{change|0x12|0x15}}|Query Entity Tag|pre=unchanged}}
+ {{PacketList|{{change|0x13|0x16}}|Interact|pre=unchanged}}
+ {{PacketList|{{change|0x14|0x17}}|Jigsaw Generate|pre=unchanged}}
+ {{PacketList|{{change|0x15|0x18}}|Serverbound Keep Alive (play)|pre=unchanged}}
+ {{PacketList|{{change|0x16|0x19}}|Lock Difficulty|pre=unchanged}}
+  {{PacketList|{{change|0x17|0x1A}}|Set Player Position|pre=unchanged}}
+ {{PacketList|{{change|0x18|0x1B}}|Set Player Position and Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x19|0x1C}}|Set Player Rotation|pre=unchanged}}
+ {{PacketList|{{change|0x1A|0x1D}}|Set Player On Ground|pre=unchanged}}
+ {{PacketList|{{change|0x1B|0x1E}}|Move Vehicle|pre=unchanged}}
+ {{PacketList|{{change|0x1C|0x1F}}|Paddle Boat|pre=unchanged}}
+ {{PacketList|{{change|0x1D|0x20}}|Pick Item|pre=unchanged}}
+ {{PacketList|{{change|0x1E|0x21}}|Ping Request (play)|pre=unchanged}}
+ {{PacketList|{{change|0x1F|0x22}}|Place Recipe|pre=unchanged}}
+ {{PacketList|{{change|0x20|0x23}}|Player Abilities|pre=unchanged}}
+ {{PacketList|{{change|0x21|0x24}}|Player Action|pre=unchanged}}
+ {{PacketList|{{change|0x22|0x25}}|Player Command|pre=unchanged}}
+ {{PacketList|{{change|0x23|0x26}}|Player Input|pre=unchanged}}
+ {{PacketList|{{change|0x24|0x27}}|Pong (play)|pre=unchanged}}
+ {{PacketList|{{change|0x25|0x28}}|Change Recipe Book Settings|pre=unchanged}}
+ {{PacketList|{{change|0x26|0x29}}|Set Seen Recipe|pre=unchanged}}
+ {{PacketList|{{change|0x27|0x2A}}|Rename Item|pre=unchanged}}
+ {{PacketList|{{change|0x28|0x2B}}|Resource Pack Response (play)|pre=unchanged}}
+ {{PacketList|{{change|0x29|0x2C}}|Seen Advancements|pre=unchanged}}
+ {{PacketList|{{change|0x2A|0x2D}}|Select Trade|pre=unchanged}}
+ {{PacketList|{{change|0x2B|0x2E}}|Set Beacon Effect|pre=unchanged}}
+ {{PacketList|{{change|0x2C|0x2F}}|Set Held Item|pre=unchanged}}
+ {{PacketList|{{change|0x2D|0x30}}|Program Command Block|pre=unchanged}}
+ {{PacketList|{{change|0x2E|0x31}}|Program Command Block Minecart|pre=unchanged}}
+ {{PacketList|{{change|0x2F|0x32}}|Set Creative Mode Slot|pre=unchanged}}
+ {{PacketList|{{change|0x30|0x33}}|Program Jigsaw Block|pre=unchanged}}
+ {{PacketList|{{change|0x31|0x34}}|Program Structure Block|pre=unchanged}}
+ {{PacketList|{{change|0x32|0x35}}|Update Sign|pre=unchanged}}
+ {{PacketList|{{change|0x33|0x36}}|Swing Arm|pre=unchanged}}
+ {{PacketList|{{change|0x34|0x37}}|Teleport To Entity|pre=unchanged}}
+ {{PacketList|{{change|0x35|0x38}}|Use Item On|pre=unchanged}}
+  {{PacketList|{{change|0x36|0x39}}|Use Item|pre=unchanged}}
+ |}
 == New/modified data types ==
-=== Objects ===
+No changes so far.
+== Entity Metadata ==
-Objects are spawned via [[Protocol#Spawn_Object|Spawn Object]]. See [[Object Data]] for more details.
+{{#vardefine: meta_prerelease | 1}}
-{| class="wikitable"
+{{Metadata type definition/begin}}
-|-
+ ! Value
-! ID
+ ! Notes
-! Name
+{{Metadata type definition|Byte}}
-! x, z
+ | {{Type|Byte}}
-! y
+ |
-|-
+{{Metadata type definition|VarInt}}
-| 1
+ | {{Type|VarInt}}
-| Boat
+ |
-| 1.5
+{{Metadata type definition|VarLong}}
-| 0.6
+ | {{Type|VarLong}}
-|-
+ |
-| 2
+{{Metadata type definition|Float}}
-| Item Stack ([[Slot]])
+ | {{Type|Float}}
-| 0.25
+ |
-| 0.25
+{{Metadata type definition|String}}
-|-
+ | {{Type|String}}
-| 3
+ |
-| Area Effect Cloud
+{{Metadata type definition|Text Component}}
-| ?
+ | {{Type|Text Component}}
-| ?
+ |
-|-
+{{Metadata type definition|Optional Text Component}}
-| 10
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
-| Minecart
+ | Text Component is present if the Boolean is set to true.
-| 0.98
+{{Metadata type definition|Slot}}
-| 0.7
+ | {{Type|Slot}}
-|-
+ |
-| 50
+{{Metadata type definition|Boolean}}
-| Activated TNT
+ | {{Type|Boolean}}
-| 0.98
+ |
-| 0.98
+{{Metadata type definition|Rotations}}
-|-
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
-| 51
+ | rotation on x, rotation on y, rotation on z
-| EnderCrystal
+{{Metadata type definition|Position}}
-| 2.0
+ | {{Type|Position}}
-| 2.0
+ |
-|-
+{{Metadata type definition|Optional Position}}
-| 60
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
-| Tipped arrow (projectile; also used for regular arrows)
+ | Position is present if the Boolean is set to true.
-| 0.5
+{{Metadata type definition|Direction}}
-| 0.5
+ | {{Type|VarInt}} {{Type|Enum}}
-|-
+ | Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
-| 61
+{{Metadata type definition|Optional UUID}}
-| Snowball (projectile)
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
-| 0.25
+ | UUID is present if the Boolean is set to true.
-| 0.25
+{{Metadata type definition|Block State}}
-|-
+ | {{Type|VarInt}}
-| 62
+ | An ID in the block state registry.
-| Egg (projectile)
+{{Metadata type definition|Optional Block State}}
-| 0.25
+ | {{Type|VarInt}}
-| 0.25
+ | 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
-|-
+{{Metadata type definition|NBT}}
-| 63
+ | {{Type|NBT}}
-| FireBall (ghast projectile)
+ |
-| 1.0
+{{Metadata type definition|Particle}}
-| 1.0
+ | ({{Type|VarInt}}, Varies)
-|-
+ | particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
-| 64
+{{Metadata type definition|Particles|rel=added}}
-| FireCharge (blaze projectile)
+ | ({{Type|VarInt}}, Array of Particle)
-| 0.3125
+ | length of array, particle data (See directly above.)
-| 0.3125
+{{Metadata type definition|Villager Data}}
-|-
+ | ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
-| 65
+ | villager type, villager profession, level (See below.)
-| Thrown Enderpearl
+{{Metadata type definition|Optional VarInt}}
-| 0.25
+ | {{Type|VarInt}}
-| 0.25
+ | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
-|-
+{{Metadata type definition|Pose}}
-| 66
+ | {{Type|VarInt}} {{Type|Enum}}
-| Wither Skull (projectile)
+ | STANDING = 0, FALL_FLYING = 1, SLEEPING = 2, SWIMMING = 3, SPIN_ATTACK = 4, SNEAKING = 5, LONG_JUMPING = 6, DYING = 7, CROAKING = 8, USING_TONGUE = 9, SITTING = 10, ROARING = 11, SNIFFING = 12, EMERGING = 13, DIGGING = 14{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
-| 0.3125
+{{Metadata type definition|Cat Variant}}
-| 0.3125
+ | {{Type|VarInt}}
-|-
+ | An ID in the <code>minecraft:cat_variant</code> registry.
-| 67
+{{Metadata type definition|Wolf Variant|rel=added}}
-| Shulker Bullet
+ | {{Type|VarInt}}
-| 0.3125
+ | An ID in the <code>minecraft:wolf_variant</code> registry.
-| 0.3125
+{{Metadata type definition|Frog Variant}}
-|-
+ | {{Type|VarInt}}
-|style="background-color: #d9ead3;"|68
+ | An ID in the <code>minecraft:frog_variant</code> registry.
-|style="background-color: #d9ead3;"|Llama spit
+{{Metadata type definition|Optional Global Position}}
-|style="background-color: #d9ead3;"|0.25
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
-|style="background-color: #d9ead3;"|0.25
+ | dimension identifier, position; only if the Boolean is set to true.
-|-
+{{Metadata type definition|Painting Variant}}
-| 70
+ | {{Type|VarInt}}
-| Falling Objects
+ | An ID in the <code>minecraft:painting_variant</code> registry.
-| 0.98
+{{Metadata type definition|Sniffer State}}
-| 0.98
+ | {{Type|VarInt}} {{Type|Enum}}
-|-
+ | IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
-| 71
+{{Metadata type definition|Armadillo State|rel=added}}
-| Item frames
+ | {{Type|VarInt}} {{Type|Enum}}
-| varies
+ | IDLE = 0, ROLLING = 1, SCARED = 2
-| varies
+{{Metadata type definition|Vector3}}
-|-
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
-| 72
+ | x, y, z
-| Eye of Ender
+{{Metadata type definition|Quaternion}}
-| 0.25
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
-| 0.25
+ | x, y, z, w
-|-
+ |}
-| 73
-| Thrown Potion
-| 0.25
-| 0.25
-|-
-| 75
-| Thrown Exp Bottle
-| 0.25
-| 0.25
-|-
-| 76
-| Firework Rocket
-| 0.25
-| 0.25
-|-
-| 77
-| Leash Knot
-| 0.5
-| 0.5
-|-
-| 78
-| ArmorStand
-| 0.5
-| 2.0
-|-
-|style="background-color: #d9ead3;"|79
-|style="background-color: #d9ead3;"|Evocation Fangs
-|style="background-color: #d9ead3;"|0.8
-|style="background-color: #d9ead3;"|0.5
-|-
-| 90
-| Fishing Float
-| 0.25
-| 0.25
-|-
-| 91
-| Spectral Arrow
-| 0.5
-| 0.5
-|-
-| 93
-| Dragon Fireball
-| 0.3125
-| 0.3125
-|}
-Since release {{Minecraft Wiki|1.6}}, all minecarts are spawned with object type 10 and their functionality is then specified in the [[Object Data#Minecarts (id 10)|Data field]] within the packet. Also, their visual appearance may be sent via the [[Protocol#Entity Metadata|Entity Metadata]] packet.
+=== Living Entity ===
+TODO: This has changed to use the PARTICLES attribute
-=== Mobs ===
+=== Wolf ===
-Mobs are spawned via [[Protocol#Spawn_Mob|Spawn Mob]]. There are two extra mob types in the code that refer to mobs classes that can never spawn: Mob and Monster (they are always subclasses, aka another more specific type).
+{{Metadata inherit|Wolf|inherits=Tameable Animal}}
 {| class="wikitable"
-|-
-! Type
-! Name
-! x, z
-! y
-! ID
-|- style="background-color: #d9ead3;"
-| 4
-| ElderGuardian
-| 0.85
-| 0.85
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:elder_guardian</code>
-|- style="background-color: #d9ead3;"
-| 5
-| WitherSkeleton
-| 0.7
-| 2.4
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wither_skeleton</code>
-|- style="background-color: #d9ead3;"
-| 6
-| Stray
-| 0.6
-| 1.99
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:stray</code>
-|- style="background-color: #d9ead3;"
-| 23
-| Husk
-| 0.6
-| 1.95
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:husk</code>
-|- style="background-color: #d9ead3;"
-| 27
-| ZombieVillager
-| 0.6
-| 1.95
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_villager</code>
-|- style="background-color: #d9ead3;"
-| 28
-| SkeletonHorse
-| 1.396484
-| 1.6
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:skeleton_horse</code>
-|- style="background-color: #d9ead3;"
-| 29
-| ZombieHorse
-| 1.396484
-| 1.6
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_horse</code>
-|- style="background-color: #d9ead3;"
-| 31
-| Donkey
-| 1.396484
-| 1.6
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:donkey</code>
-|- style="background-color: #d9ead3;"
-| 32
-| Mule
-| 1.396484
-| 1.6
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:mule</code>
-|- style="background-color: #d9ead3;"
-| 33
-| EvocationFangs
-| 0.5
-| 0.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:evocation_fangs</code>
-|- style="background-color: #d9ead3;"
-| 34
-| EvocationIllager
-| 0.6
-| 1.95
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:evocation_illager</code>
-|- style="background-color: #d9ead3;"
-| 35
-| Vex
-| 0.4
-| 0.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:vex</code>
-|- style="background-color: #d9ead3;"
-| 36
-| VindicationIllager
-| 0.6
-| 1.95
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:vindication_illager</code>
-|-
-| 48
-| Mob
-| N/A
-| N/A
-| N/A
-|-
-| 49
-| Monster
-| N/A
-| N/A
-| N/A
-|-
-| 50
-| Creeper
-| 0.6
-| 1.7
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:creeper</code>
-|-
-| 51
-| Skeleton
-| 0.6
-| 1.99
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:skeleton</code>
-|-
-| 52
-| Spider
-| 1.4
-| 0.9
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:spider</code>
-|-
-| 53
-| {{change|Giant Zombie|Giant}}
-| 0.6 * 6
-| 1.8 * 6
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:giant</code>
-|-
-| 54
-| Zombie
-| 0.6
-| 1.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie</code>
-|-
-| 55
-| Slime
-| 0.51000005 * size
-| 0.51000005 * size
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:slime</code>
-|-
-| 56
-| Ghast
-| 4
-| 4
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ghast</code>
-|-
-| 57
-| {{change|Zombie Pigman|PigZombie}}
-| 0.6
-| 1.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:zombie_pigman</code>
-|-
-| 58
-| Enderman
-| 0.6
-| 2.9
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:enderman</code>
-|-
-| 59
-| {{change|Cave Spider|CaveSpider}}
-| 0.7
-| 0.5
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:cave_spider</code>
-|-
-| 60
-| Silverfish
-| 0.4
-| 0.3
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:silverfish</code>
-|-
-| 61
-| Blaze
-| 0.6
-| 1.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:blaze</code>
-|-
-| 62
-| {{change|Magma Cube|LavaSlime}}
-| 0.51000005 * size
-| 0.51000005 * size
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:magma_cube</code>
-|-
-| 63
-| {{change|Ender Dragon|EnderDragon}}
-| 16.0
-| 8.0
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ender_dragon</code>
-|-
-| 64
-| {{change|Wither|WitherBoss}}
-| 0.9
-| 3.5
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wither</code>
-|-
-| 65
-| Bat
-| 0.5
-| 0.9
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:bat</code>
-|-
-| 66
-| Witch
-| 0.6
-| 1.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:witch</code>
-|-
-| 67
-| Endermite
-| 0.4
-| 0.3
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:endermite</code>
-|-
-| 68
-| Guardian
-| 0.85
-| 0.85
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:guardian</code>
-|-
-| 69
-| Shulker
-| 1
-| 1
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:shulker</code>
-|-
-| 90
-| Pig
-| 0.9
-| 0.9
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:pig</code>
-|-
-| 91
-| Sheep
-| 0.9
-| 1.3
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:sheep</code>
-|-
-| 92
-| Cow
-| 0.9
-| 1.4
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:cow</code>
-|-
-| 93
-| Chicken
-| 0.4
-| 0.7
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:chicken</code>
-|-
-| 94
-| Squid
-| 0.8
-| 0.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:squid</code>
-|-
-| 95
-| Wolf
-| 0.6
-| 0.85
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:wolf</code>
-|-
-| 96
-| {{change|Mooshroom|MushroomCow}}
-| 0.9
-| 1.3
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:mooshroom</code>
-|-
-| 97
-| {{change|Snowman|SnowMan}}
-| 0.7
-| 1.9
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:snowman</code>
-|-
-| 98
-| {{change|Ocelot|Ozelot}}
-| 0.6
-| 0.8
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:ocelot</code>
-|-
-| 99
-| {{change|Iron Golem|VillagerGolem}}
-| 1.4
-| 2.7
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:villager_golem</code>
-|-
-| 100
-| {{change|EntityHorse|Horse}}
-| 1.396484
-| 1.6
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:horse</code>
-|-
-| 101
-| Rabbit
-| 0.4
-| 0.5
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:rabbit</code>
-|-
-| 102
-| {{change|Polar Bear|PolarBear}}
-| 1.3
-| 1.4
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:polar_bear</code>
-|- style="background-color: #d9ead3;"
-| 103
-| Llama
-| 1.3964844
-| 1.87
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:llama</code>
-|-
-|-
-| 120
-| Villager
-| 0.6
-| 1.95
-| style="background-color: #d9ead3; text-align: center;" | <code>minecraft:villager</code>
-|}
-=== Entity Metadata ===
-=== EvocationIllager ===
-Extends [[#Monster|Monster]].
-{| class="wikitable" style="background-color: #d9ead3;"
   ! Index
   ! Type
   !style="width: 250px;" colspan="2"| Meaning
+ ! Default
+ |- {{added}}
+ | {{Metadata id|}}
+ | {{Metadata type|Wolf Variant}}
+ |colspan="2"| Wolf Variant
+ | PALE
   |-
-  | 12
+  | {{Metadata id|}}
-  | Byte
+ | {{Metadata type|Boolean}}
-  | Unknown (Probably hands up animation)
+ |colspan="2"| Is begging
+ | false
+ |-
+ | {{Metadata id|}}
+ | {{Metadata type|VarInt}}
+  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+  | 14 (Red)
+ |-
+ | {{Metadata id|}}
+ | {{Metadata type|VarInt}}
+ |colspan="2"| Anger time
+ | 0
   |}
-=== Vex ===
+=== Armadillo ===
-Extends [[#Monster|Monster]].
-{| class="wikitable" style="background-color: #d9ead3;"
+{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
+{| class="wikitable" {{added}}
   ! Index
   ! Type
   !style="width: 250px;" colspan="2"| Meaning
+ ! Default
   |-
-  |rowspan="3"| 12
+  | {{Metadata id|added}}
-  |rowspan="3"| Byte
+  | {{Metadata type|Armadillo State}}
- ! Bit mask
+  |colspan="2"| Armadillo State
- ! Meaning
+  | IDLE
-  |- style="background-color: #d9ead3;"
- | 0x01
-  | Attack state
   |}
-=== VindicationIllager ===
+== Block Actions ==
-Extends [[#Monster|Monster]].
+No changes so far.
-{| class="wikitable" style="background-color: #d9ead3;"
+== Inventories ==
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- |-
- |rowspan="3"| 12
- |rowspan="3"| Byte
- ! Bit mask
- ! Meaning
- |- style="background-color: #d9ead3;"
- | 0x01
- | Is attacking?
- |}
-=== EvocationFangs ===
+No changes so far.
-Extends [[#Entity|Entity]].
+== Plugin Channels ==
-=== AbstractSkeleton ===
+No changes so far.
-Extends [[#Monster|Monster]].
+== Handshake ==
-{| class="wikitable" style="background-color: #d9ead3;"
+=== Serverbound ===
- ! Index
- ! Type
- !style="width: 250px;" colspan="2"| Meaning
- |-
- | 12
- | Boolean
- |colspan="2"| Is swinging arms
- |}
-=== Skeleton ===
+==== Handshake ====
-Extends [[#AbstractSkeleton|AbstractSkeleton]].
+This causes the server to switch into the target state.
-{| class="wikitable" style="background-color: #f4cccc;"
+{| class="wikitable"
-  ! Index
+  ! Packet ID
-  ! Type
+ ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
+ ! Field Name
+  ! Field Type
+  ! Notes
+ |-
+ | rowspan="4"| 0x00
+ | rowspan="4"| Handshaking
+ | rowspan="4"| Server
+ | Protocol Version
+ | [[#Definitions:varint|VarInt]]
+ | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
+ |-
+ | Server Address
+ | [[#Definitions:string|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.
   |-
-  | 12
+  | Server Port
-  | VarInt
+  | [[#Definitions:unsigned-short|Unsigned Short]]
-  |colspan="2"| Type (Normal = 0, Wither = 1, Stray = 2)
+  | Default is 25565. The Notchian server does not use this information.
   |-
-  | 13
+  | Next State
-  | Boolean
+  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
-  |colspan="2"| Is swinging arms (Used to animate arms for melee attacks; only used when the skeleton does not have a bow in its hand)
+  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
   |}
-=== Wither Skeleton ===
+== Status ==
-Extends [[#AbstractSkeleton|AbstractSkeleton]].
+=== Clientbound ===
-=== Stray ===
+No changes so far.
-Extends [[#AbstractSkeleton|AbstractSkeleton]].
+=== Serverbound ===
-=== Zombie ===
+No changes so far.
-Extends [[#Monster|Monster]].
+== Login ==
+=== Clientbound ===
+==== Encryption Request ====
 {| class="wikitable"
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
+ ! Field Name
+ ! Field Type
+  ! Notes
+ |-
+ | rowspan="6"| 0x01
+ | rowspan="6"| Login
+ | rowspan="6"| Client
+ | Server ID
+ | {{Type|String}} (20)
+ | Appears to be empty.
+ |-
+ | Public Key Length
+ | {{Type|VarInt}}
+ | Length of Public Key.
   |-
-  | 12
+  | Public Key
-  | Boolean
+  | {{Type|Byte Array}}
-  |colspan="2"| Is baby
+  | The server's public key, in bytes.
   |-
-  | 13
+  | Verify Token Length
-  | VarInt
+  | {{Type|VarInt}}
- |colspan="2"| {{change|Zombie type (0 for zombie, profession+1 for villagers, 6 for Husk)|Unused}}
+  | Length of Verify Token. Always 4 for Notchian servers.
-  |- style="background-color: #f4cccc;"
- | 14
- | Boolean
- |colspan="2"| Is converting
   |-
-  | {{change|15|14}}
+ | Verify Token
-  | Boolean
+  | {{Type|Byte Array}}
-  |colspan="2"| Are hands held up
+ | A sequence of random bytes generated by the server.
+ |- {{added}}
+  | Should Authenticate
+ | {{Type|Boolean}}
+  |
   |}
-=== Zombie Villager ===
+==== Cookie Request (login) ====
-Extends [[#Zombie|Zombie]].
+Requests a cookie that was previously stored.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  ! Index
+  ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  |- style="background-color: #d9ead3;"
+  ! colspan="2"| Field Name
-  | 15
+  ! colspan="2"| Field Type
-  | Boolean
+  ! Notes
-  |colspan="2"| Is converting
+  |-
-  |- style="background-color: #d9ead3;"
+  | rowspan="1"| 0x05
-  | 16
+  | rowspan="1"| Login
-  | VarInt
+  | rowspan="1"| Client
-  |colspan="2"| Profession
+  | colspan="2"| Key
+  | colspan="2"| Identifier
+ | The identifier of the cookie.
   |}
-=== Husk ===
+=== Serverbound ===
-Extends [[#Zombie|Zombie]].
+==== Cookie Response (login) ====
-=== Guardian ===
+Response to a [[#Cookie_Request_(login)|Cookie Request (login)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-Extends [[#Monster|Monster]].
+{| class="wikitable" {{added}}
+  ! Packet ID
-{| class="wikitable"
+  ! State
-  ! Index
+ ! Bound To
-  ! Type
+  ! colspan="2"| Field Name
-  !style="width: 250px;" colspan="2"| Meaning
+ ! colspan="2"| Field Type
-  |- style="background-color: #f4cccc;"
+ ! Notes
-  |rowspan="3"| 12
+  |-
-  |rowspan="3"| Byte
+ | rowspan="4"| 0x04
-  ! Bit mask
+  | rowspan="4"| Login
- ! Meaning
+  | rowspan="4"| Server
-  |- style="background-color: #f4cccc;"
+  | colspan="2"| Key
-  | 0x02
+  | colspan="2"| Identifier
-  | is retracting spikes
+  | The identifier of the cookie.
-  |- style="background-color: #f4cccc;"
+  |-
-  | 0x04
+  | colspan="2"| Has Payload
-  | is elderly
+  | colspan="2"| Boolean
-  |- style="background-color: #d9ead3;"
+  | The payload is only present if the cookie exists on the client.
- | 12
+  |-
- | Boolean
+ | colspan="2"| Payload Length
-  |colspan="2"| Is retracting spikes
+  | colspan="2"| VarInt
+ | Length of the following byte array.
   |-
-  | 13
+  | colspan="2"| Payload
- | VarInt
+  | colspan="2"| Optional Byte Array (5120)
-  |colspan="2"| Target EID
+ | The data of the cookie, if any.
   |}
-=== ElderGuardian ===
+== Configuration ==
-Extends [[#Guardian|Guardian]].
+=== Clientbound ===
-=== AbstractHorse ===
+==== Cookie Request (configuration) ====
-Extends [[#Animal|Animal]].
+Requests a cookie that was previously stored.
-{| class="wikitable" style="background-color: #d9ead3;"
+{| class="wikitable" {{added}}
-  ! Index
+ ! Packet ID
-  ! Type
+  ! State
-  !style="width: 250px;" colspan="2"| Meaning
+  ! Bound To
-  |-
+  ! colspan="2"| Field Name
- |rowspan="9"| 13
+  ! colspan="2"| Field Type
- |rowspan="9"| Byte
+  ! Notes
- ! Bit mask
-  ! Meaning
- |-
- | 0x01
- | ''Unused''
- |-
- | 0x02
- | Is Tame
- |-
- | 0x04
- | Is saddled
- |-
- | 0x08
- | Has Chest
- |-
- | 0x10
- | Is Bred (not used on the Notchian server; controlled via the unused Bred NBT flag)
- |-
- | 0x20
- | Is eating
- |-
- | 0x40
- | Is rearing (on hind legs)
- |-
- | 0x80
- | Is mouth open
   |-
-  | 14
+  | rowspan="1"| 0x00
-  | OptUUID
+  | rowspan="1"| Configuration
-  |colspan="2"| Owner
+ | rowspan="1"| Client
+  | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
   |}
-=== Horse ===
+==== Reset Chat ====
-Extends [[#AbstractHorse|AbstractHorse]].
+{| class="wikitable" {{added}}
+ ! Packet ID
-{| class="wikitable" style="background-color: #d9ead3;"
+ ! State
-  ! Index
+ ! Bound To
-  ! Type
+  ! Field Name
-  !style="width: 250px;" colspan="2"| Meaning
+  ! Field Type
+  ! Notes
   |-
-  | 15
+  | 0x06
-  | VarInt
+  | Configuration
-  |colspan="2"| Variant (Color & Style)
+  | Client
- |-
+  | colspan="3"| ''no fields''
- | 16
- | VarInt
-  |colspan="2"| Armor
   |}
-=== ZombieHorse ===
+==== Registry Data ====
-Extends [[#AbstractHorse|AbstractHorse]].
+Represents certain registries that are sent from the server and are applied on the client. {{change||The packet is sent for each of the following registries: <code>minecraft:worldgen/biome</code>, <code>minecraft:chat_type</code>, <code>minecraft:trim_pattern</code>, <code>minecraft:trim_material</code>, <code>minecraft:wolf_variant</code>, <code>minecraft:dimension_type</code>, <code>minecraft:damage_type</code>, and <code>minecraft:banner_pattern</code>.}}
-=== SkeletonHorse ===
+{| class="wikitable"
+  ! Packet ID
-Extends [[#AbstractHorse|AbstractHorse]].
+ ! State
+  ! Bound To
-=== ChestedHorse ===
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
-Extends [[#AbstractHorse|AbstractHorse]].
+ ! Notes
-{| class="wikitable" style="background-color: #d9ead3;"
-  ! Index
-  ! Type
-  !style="width: 250px;" colspan="2"| Meaning
   |-
-  | 15
+  | rowspan="6"| 0x07
+ | rowspan="6"| Configuration
+ | rowspan="6"| Client
+ |{{removed}} colspan="2"| Registry Codec
+ |{{removed}} colspan="2"| {{Type|NBT}} (Compound)
+ |{{removed}}| See [[Registry Data]].
+ |- {{added}}
+ | colspan="2"| Registry ID
+ | colspan="2"| Identifier
+ |
+ |- {{added}}
+ | colspan="2"| Entry Count
+ | colspan="2"| VarInt
+ | Number of entries in the following array.
+ |- {{added}}
+ | rowspan="3"| Entries
+ | Entry ID
+ | rowspan="3"| Array
+ | Identifier
+ |
+ |- {{added}}
+ | Has Data
   | Boolean
-  |colspan="2"| Has Chest
+  | Whether the entry has any data following.
+ |- {{added}}
+ | Data
+ | NBT Tag
+ | Entry data. Only present if Has Data is true.
   |}
-=== Donkey ===
+==== Store Cookie (configuration) ====
-Extends [[#ChestedHorse|ChestedHorse]].
+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.
-=== Llama ===
+{| class="wikitable" {{added}}
+ ! Packet ID
-Extends [[#ChestedHorse|ChestedHorse]].
+  ! State
+  ! Bound To
-{| class="wikitable" style="background-color: #d9ead3;"
+  ! colspan="2"| Field Name
-  ! Index
+ ! colspan="2"| Field Type
-  ! Type
+ ! Notes
-  !style="width: 250px;" colspan="2"| Meaning
   |-
-  | 16
+  | rowspan="2"| 0x0A
-  | Integer
+ | rowspan="2"| Configuration
-  | colspan="2"| Strength (number of rows in the llama inventory???)
+ | rowspan="2"| Client
+  | colspan="2"| Key
+  | colspan="2"| Identifier
+ | The identifier of the cookie.
   |-
- | 17
+  | colspan="2"| Payload
- | Integer
+  | colspan="2"| ByteArray(5120)
-  | colspan="2"| Carpet color (a dye color, or -1 if no carpet equipped)
+ | The data of the cookie.
- |-
- | 18
- | Integer
-  | colspan="2"| Variant (0: <code>llama_creamy.png</code>, 1: <code>llama_white.png</code>, 2: <code>llama_brown.png</code>, 3: <code>llama_gray.png</code>)
   |}
-=== Mule ===
+==== Transfer (configuration) ====
-Extends [[#ChestedHorse|ChestedHorse]].
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-=== Shulker ===
+{| class="wikitable" {{added}}
+  ! Packet ID
-Extends [[#Golem|Golem]].
+  ! State
+ ! Bound To
-{| class="wikitable"
+  ! colspan="2"| Field Name
-  ! Index
+  ! colspan="2"| Field Type
-  ! Type
+ ! Notes
-  ! style="width: 250px;" colspan="2"| Meaning
-  |-
- | 12
- | Direction
- |colspan="2"| Facing direction
   |-
-  | 13
+  | rowspan="2"| 0x0B
-  | OptPosition
+ | rowspan="2"| Configuration
-  |colspan="2"| Attachment position
+ | rowspan="2"| Client
+  | colspan="2"| Host
+  | colspan="2"| String
+ | The hostname of IP of the server.
   |-
- | 14
+  | colspan="2"| Port
- | Byte
+  | colspan="2"| VarInt
-  |colspan="2"| Shield height
+  | The port of the server.
-  |- style="background-color: #d9ead3;"
- | 15
-  | Byte
- | colspan="2"| Color (dye color, default of pink (verify this, shouldn't it be purple?))
   |}
-== Inventory ==
+==== Clientbound Known Packs ====
+{| class="wikitable" {{added}}
-{| class="wikitable"
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
   |-
-  ! Window Type
+  | rowspan="4"| 0x0E
-  ! Description
+  | rowspan="4"| Configuration
+ | rowspan="4"| Client
+ | colspan="2"| Known Pack Count
+ | colspan="2"| VarInt
+ | The number of known packs in the following array.
   |-
-  | minecraft:chest
+  | rowspan="3"| Known Packs
-  | {{Minecraft Wiki|Chest}}, large chest, or {{Minecraft Wiki|minecart with chest}}
+  | Namespace
+ | rowspan="3"| Array
+ | String
+ |
   |-
-  | minecraft:crafting_table
+  | ID
-  | {{Minecraft Wiki|Crafting table}}
+  | String
+ |
   |-
-  | minecraft:furnace
+  | Version
-  | {{Minecraft Wiki|Furnace}}
+  | String
- |-
+  |
- | minecraft:dispenser
- | {{Minecraft Wiki|Dispenser}}
-  |-
- | minecraft:enchanting_table
- | {{Minecraft Wiki|Enchantment table}}
- |-
- | minecraft:brewing_stand
- | {{Minecraft Wiki|Brewing stand}}
- |-
- | minecraft:villager
- | {{Minecraft Wiki|Villager}}
- |-
- | minecraft:beacon
- | {{Minecraft Wiki|Beacon}}
- |-
- | minecraft:anvil
- | {{Minecraft Wiki|Anvil}}
- |-
- | minecraft:hopper
- | {{Minecraft Wiki|Hopper}} or {{Minecraft Wiki|minecart with hopper}}
- |-
- | minecraft:dropper
- | {{Minecraft Wiki|Dropper}}
- |-
- |style="background-color: #d9ead3;"| minecraft:shulker_box
- |style="background-color: #d9ead3;"| {{Minecraft Wiki|Shulker box}}
- |-
- | EntityHorse
- | {{Minecraft Wiki|Horse|Horse, donkey, or mule}}, {{change||or {{Minecraft Wiki|Llama}}}}
   |}
-=== Shulker box ===
+=== Serverbound ===
-<!-- Yes, this image doesn't exist yet; I'll add it later. -->
-[[File:Shulker-box-slots.png|thumb|Shulker box slots]]
+==== Cookie Response (configuration) ====
-This is the window that is opened when the player right-clicks on a shulker box chest.
+Response to a [[#Cookie_Request_(configuration)|Cookie Request (configuration)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-{| class="wikitable"
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
   |-
-  ! Slot range
+  | rowspan="4"| 0x01
-  ! Description
+  | rowspan="4"| Configuration
+ | rowspan="4"| Server
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
   |-
-  | 0–26
+  | colspan="2"| Has Payload
-  | box slots
+ | colspan="2"| Boolean
+  | The payload is only present if the cookie exists on the client.
   |-
-  | 27–53
+  | colspan="2"| Payload Length
-  | main inventory
+ | colspan="2"| VarInt
+  | Length of the following byte array.
   |-
-  | 54–62
+  | colspan="2"| Payload
-  | hotbar
+ | colspan="2"| Optional Byte Array (5120)
+  | The data of the cookie, if any.
   |}
-=== Llama ===
+==== Serverbound Known Packs ====
-<!-- Again, this image doesn't exist yet -->
-[[File:Llama-slots.png|thumb|Llama slots]]
-The inventory that appears when a tamed llama is right-clicked and has a chest, or when the player's inventory is opened while riding a tamed llama.  Depending on the value of the strength field, the number of chest rows may vary (max is 5, so 15 slots).
+ID 0x07, same structure as Clientbound Known Packs. If the client specifies a pack in this packet, the server should omit its contained data from Registry Data.
-{{warning|There still is a saddle slot, even though it cannot be used and is invisible.}}
+== Play ==
-{| class="wikitable"
- |-
- ! Slot range
- ! Description
- |-
- | 0
- | saddle
- |-
- | 1
- | carpet
- |-
- | 2-(2+3*Strength)
- | llama inventory
- |-
- | ...
- | player inventory
- |-
- | ...
- | hotbar
- |}
-== Handshaking ==
 === Clientbound ===
-No changes so far.
+==== Cookie Request (play) ====
-=== Serverbound ===
+Requests a cookie that was previously stored.
-==== Handshake ====
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="1"| 0x16
+ | rowspan="1"| Play
+ | rowspan="1"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |}
-This causes the server to switch into the target state.
+==== Debug Sample ====
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 935: / Line 755: @@
   ! Notes
   |-
-  |rowspan="4"| 0x00
+  | rowspan="3"| 0x1B
-  |rowspan="4"| Handshaking
+  | rowspan="3"| Play
-  |rowspan="4"| Server
+  | rowspan="3"| Client
-  | Protocol Version
+  | Sample Length
   | VarInt
-  | See [[protocol version numbers]] (currently {{change|210|308}})
+  | The length of the following array.
   |-
-  | Server Address
+  | Sample
-  | String
+  | Long Array
-  | Hostname or IP, e.g. localhost or 127.0.0.1, that was used to connect.  The Notchian server does not use this information.
+  | TODO: What is the structure of the data in this array?
- |-
- | Server Port
- | Unsigned Short
- | Default is 25565.  The Notchian server does not use this information.
   |-
-  | Next State
+  | Sample Type
   | VarInt Enum
-  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+  | The type of sample data. Currently always 0 (TICK_TIME).
   |}
-== Play ==
+==== Login (play) ====
-=== Clientbound ===
-==== Spawn Mob ====
-Sent by the server when a mob entity is spawned.
 {| class="wikitable"
@@ Line 971: / Line 781: @@
   ! Notes
   |-
-  |rowspan="13"| 0x03
+  | rowspan="22"| 0x2B
-  |rowspan="13"| Play
+  | rowspan="22"| Play
-  |rowspan="13"| Client
+  | rowspan="22"| Client
   | Entity ID
-  | VarInt
+  | {{Type|Int}}
-  |
+ | The player's Entity ID (EID).
+ |-
+ | Is hardcore
+ | {{Type|Boolean}}
+ |
+ |-
+ | Dimension Count
+ | {{Type|VarInt}}
+ | Size of the following array.
+ |-
+ | Dimension Names
+ | {{Type|Array}} of {{Type|Identifier}}
+ | Identifiers for all dimensions on the server.
+ |-
+ | Max Players
+ | {{Type|VarInt}}
+ | Was once used by the client to draw the player list, but now is ignored.
+ |-
+ | View Distance
+ | {{Type|VarInt}}
+ | Render distance (2-32).
+ |-
+ | Simulation Distance
+ | {{Type|VarInt}}
+ | The distance that the client will process specific things, such as entities.
+ |-
+ | Reduced Debug Info
+ | {{Type|Boolean}}
+ | If true, a Notchian client shows reduced information on the {{Minecraft Wiki|debug screen}}.  For servers in development, this should almost always be false.
+ |-
+ | Enable respawn screen
+ | {{Type|Boolean}}
+ | Set to false when the doImmediateRespawn gamerule is true.
+ |-
+ | Do limited crafting
+ | {{Type|Boolean}}
+  | Whether players can only craft recipes they have already unlocked. Currently unused by the client.
   |-
-  | Entity UUID
+  | Dimension Type
-  | UUID
+  | {{change|Identifier|VarInt}}
-  |
+  | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the Registry Data packet.
   |-
-  | Type
+  | Dimension Name
-  | {{change|Unsigned Byte|VarInt}}
+  | {{Type|Identifier}}
-  | The type of mob. See [[Entities#Mobs]]
+  | Name of the dimension being spawned into.
   |-
-  | X
+  | Hashed seed
-  | Double
+  | {{Type|Long}}
-  |
+  | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
   |-
-  | Y
+  | Game mode
-  | Double
+  | {{Type|Unsigned Byte}}
-  |
+  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
   |-
-  | Z
+  | Previous Game mode
-  | Double
+  | {{Type|Byte}}
-  |
+  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
   |-
-  | Yaw
+  | Is Debug
-  | Angle
+  | {{Type|Boolean}}
-  |
+  | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
   |-
-  | Pitch
+  | Is Flat
-  | Angle
+  | {{Type|Boolean}}
-  |
+  | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
   |-
-  | Head Pitch
+  | Has death location
-  | Angle
+  | {{Type|Boolean}}
-  |
+  | If true, then the next two fields are present.
   |-
-  | Velocity X
+  | Death dimension name
-  | Short
+  | {{Type|Optional}} {{Type|Identifier}}
-  | Same units as [[#Entity Velocity|Entity Velocity]]
+  | Name of the dimension the player died in.
   |-
-  | Velocity Y
+  | Death location
-  | Short
+  | {{Type|Optional}} {{Type|Position}}
-  | Same units as [[#Entity Velocity|Entity Velocity]]
+  | The location that the player died at.
   |-
-  | Velocity Z
+  | Portal cooldown
-  | Short
+  | {{Type|VarInt}}
-  | Same units as [[#Entity Velocity|Entity Velocity]]
+  | The number of ticks until the player can use the portal again.
   |-
-  | Metadata
+  | Enforces Secure Chat
-  | [[Entities#Entity Metadata Format|Entity Metadata]]
+  | {{Type|Boolean}}
   |
   |}
-==== Tab-Complete (clientbound) ====
+==== Respawn ====
-The server responds with a list of auto-completions of the last word sent to it. In the case of regular chat, this is a player username. Command names and parameters are also supported. {{change|The client lists these in the order that they are in the array.|The client sorts these alphabetically before listing them.}}
 {| class="wikitable"
@@ Line 1,039: / Line 883: @@
   ! Notes
   |-
-  |rowspan="2"| 0x0E
+  | rowspan="12"| 0x47
-  |rowspan="2"| Play
+ | rowspan="12"| Play
-  |rowspan="2"| Client
+ | rowspan="12"| Client
-  | Count
+ | Dimension Type
-  | VarInt
+ | {{change|Identifier|VarInt}}
-  | Number of elements in the following array
+ | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the [[Protocol#Registry_Data|Registry Data]] packet.
+ |-
+ | Dimension Name
+ | {{Type|Identifier}}
+ | Name of the dimension being spawned into.
+ |-
+ | Hashed seed
+ | {{Type|Long}}
+ | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
+ |-
+ | Game mode
+ | {{Type|Unsigned Byte}}
+ | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+ |-
+ | Previous Game mode
+ | {{Type|Byte}}
+ | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous game mode. Vanilla client uses this for the debug (F3 + N & F3 + F4) game mode switch. (More information needed)
+ |-
+ | Is Debug
+ | {{Type|Boolean}}
+ | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
+ |-
+ | Is Flat
+ | {{Type|Boolean}}
+ | True if the world is a {{Minecraft Wiki|superflat}} world; flat worlds have different void fog and a horizon at y=0 instead of y=63.
+ |-
+ | Has death location
+ | {{Type|Boolean}}
+ | If true, then the next two fields are present.
+ |-
+ | Death dimension Name
+ | {{Type|Optional}} {{Type|Identifier}}
+ | Name of the dimension the player died in.
+ |-
+ | Death location
+ | {{Type|Optional}} {{Type|Position}}
+ | The location that the player died at.
+ |-
+ | Portal cooldown
+ | {{Type|VarInt}}
+ | The number of ticks until the player can use the portal again.
+ |-
+ | Data kept
+ | {{Type|Byte}}
+ | Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
+In the Notchian implementation, this is context dependent:
+* normal respawns (after death) keep no data;
+* exiting the end poem/credits keeps the attributes;
+* other dimension changes (portals or teleports) keep all data.
+ |}
+==== 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.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="3"| 0x6B
+  | rowspan="3"| Play
+  | rowspan="3"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |-
+  | colspan="2"| Payload Length
+  | colspan="2"| VarInt
+  | Length of the following byte array.
+ |-
+ | colspan="2"| Payload
+ | colspan="2"| Byte Array (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.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="2"| 0x73
+ | rowspan="2"| Play
+ | rowspan="2"| Client
+ | colspan="2"| Host
+ | colspan="2"| String
+ | The hostname of IP of the server.
   |-
-  | Matches
+  | colspan="2"| Port
-  | Array of String
+  | colspan="2"| VarInt
-  | One eligible command, note that each command is sent separately instead of in a single string, hence the need for Count
+  | The port of the server.
   |}
-==== Entity Status ====
+==== Update Attributes ====
+Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 {| class="wikitable"
@@ Line 1,057: / Line 999: @@
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="2"| 0x1B
+  | rowspan="6"| 0x71
-  |rowspan="2"| Play
+  | rowspan="6"| Play
-  |rowspan="2"| Client
+  | rowspan="6"| Client
-  | Entity ID
+  | colspan="2"| Entity ID
-  | Int
+  | colspan="2"| VarInt
-  |
+ |
+ |-
+ | colspan="2"| Number Of Properties
+ | colspan="2"| VarInt
+ | Number of elements in the following array.
+ |-
+ | rowspan="4"| Property
+ | {{change|Key|Id}}
+ | rowspan="4"| Array
+ | {{change|Identifier|VarInt Enum}}
+ | See below.
+ |-
+ | Value
+ | Double
+ | See below.
+ |-
+ | Number Of Modifiers
+ | VarInt
+  | Number of elements in the following array.
   |-
-  | Entity Status
+  | Modifiers
-  | Byte Enum
+  | Array of Modifier Data
-  | See below
+  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
   |}
+Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
+These changed between 24w03b and 24w13a, TODO: Update this
 {| class="wikitable"
   |-
-  ! Entity Status
+  ! Id
-  ! Meaning
+  ! Key
+ ! Default
+ ! Min
+ ! Max
+ ! Label
   |-
   | 0
-  | Spawn tipped arrow particle effects
+  | generic.armor
-  |-
+  | 0.0
-  | 1
+  | 0.0
-  | Reset a mob spawner minecart's timer (unused by the client?)
+  | 30.0
+ | Armor.
   |-
   | 1
-  | Create rabbit running particles
+  | generic.armor_toughness
+ | 0.0
+ | 0.0
+ | 20.0
+ | Armor Toughness.
   |-
   | 2
-  | Entity hurt animation
+  | generic.attack_damage
+ | 2.0
+ | 0.0
+ | 2048.0
+ | Attack Damage.
   |-
   | 3
-  | Entity died animation
+  | generic.attack_knockback
+ | 0.0
+ | 0.0
+ | 5.0
+ | Attack Knockback.
   |-
   | 4
-  | Iron Golem throwing up arms
+  | generic.attack_speed
-  |-
+ | 4.0
+ | 0.0
+ | 1024.0
+ | Attack Speed.
+ |- {{added}}
+ | 5
+ | generic.block_interaction_range
+ | 4.5
+ | 0.0
+ | 64.0
+ | Block Interaction Range.
+  |- {{added}}
   | 6
-  | Wolf/Ocelot/Horse taming — Spawn “heart” particles
+  | generic.entity_interaction_range
+ | 3.0
+ | 0.0
+ | 64.0
+ | Entity Interaction Range.
   |-
   | 7
-  | Wolf/Ocelot/Horse tamed — Spawn “smoke” particles
+  | generic.flying_speed
+ | 0.4
+ | 0.0
+ | 1024.0
+ | Flying Speed.
   |-
   | 8
-  | Wolf shaking water — Trigger the shaking animation
+  | generic.follow_range
+ | 32.0
+ | 0.0
+ | 2048.0
+ | Follow Range.
   |-
   | 9
-  | Mark item use as finished (ie, eating finished, drinking finished)
+  | horse.jump_strength
-  |-
+  | 0.7
-  | 10
+  | 0.0
-  | Sheep eating grass
+  | 2.0
+ | Jump Strength.
   |-
   | 10
-  | Ignite TNT minecart
+  | generic.knockback_resistance
+ | 0.0
+ | 0.0
+ | 1.0
+ | Knockback Resistance.
   |-
   | 11
-  | Iron Golem handing over a rose
+  | generic.luck
+ | 0.0
+ | -1024.0
+ | 1024.0
+ | Luck.
   |-
   | 12
-  | Villager mating — Spawn “heart” particles
+  | generic.max_absorption
+ | 0.0
+ | 0.0
+ | 2048.0
+ | Max Absorption.
   |-
   | 13
-  | Spawn particles indicating that a villager is angry and seeking revenge
+  | generic.max_health
+ | 20.0
+ | 1.0
+ | 1024.0
+ | Max Health.
   |-
   | 14
-  | Spawn happy particles near a villager
+  | generic.movement_speed
-  |-
+ | 0.7
+ | 0.0
+ | 1024.0
+ | Movement Speed.
+  |- {{added}}
   | 15
-  | Witch animation — Spawn “magic” particles
+  | generic.scale
+ | 1.0
+ | 0.0625
+ | 16.0
+ | Scale.
   |-
   | 16
-  | Play zombie converting into a villager sound
+  | zombie.spawn_reinforcements
-  |-
+ | 0.0
+ | 0.0
+ | 1.0
+ | Spawn Reinforcements Chance.
+  |- {{added}}
   | 17
-  | Firework exploding
+  | generic.step_height
+ | 0.6
+ | 0.0
+ | 10.0
+ | Step Height.
+ |}
+''Modifier Data'' structure:
+{| class="wikitable"
   |-
-  | 18
+  ! Field Name
-  | Animal in love (ready to mate) — Spawn “heart” particles
+  ! Field Type
+ ! Notes
   |-
-  | 19
+  | UUID
-  | Reset squid rotation
+ | UUID
+  |
   |-
-  | 20
+  | Amount
-  | Spawn explosion particle — works for some living entities
+  | Double
+ | May be positive or negative.
   |-
-  | 21
+  | Operation
-  | Play guardian sound — works for every entity
+  | Byte
-  |-
+  | See below.
- | 22
- | Enables reduced {{Minecraft Wiki|Debug screen|debug}} for the given player
- |-
- | 23
- | Disables reduced {{Minecraft Wiki|Debug screen|debug}} for the given player
- |-
- | 24–28
- | Sets the {{Minecraft Wiki|Server.properties#op-permission-level|op permission level}} 0–4 for the connected player
- |-
- | 29
- | Shield block sound
- |-
- | 30
- | Shield break sound
- |-
- | 31
- | For a fishing rod bobber, if the hooked entity is this player, tug that player toward the caster of the rod
- |-
- | 32
- | Armorstand hit sound
- |-
- | 33
- | Entity hurt due to thorns (play thorns sound, perform normal hurt animation)
- |-
- |style="background-color: #d9ead3;"| 35
- |style="background-color: #d9ead3;"| Plays the Totem of Undying animation
   |}
-==== Map ====
+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.
-Updates a rectangular area on a {{Minecraft Wiki|map}} item.
+==== Entity Effect ====
 {| class="wikitable"
@@ Line 1,183: / Line 1,208: @@
   ! State
   ! Bound To
-  !colspan="2"| Field Name
+  ! Field Name
-  !colspan="2"| Field Type
+  ! Field Type
   ! Notes
   |-
-  |rowspan="13"| 0x24
+  | rowspan="7"| 0x72
-  |rowspan="13"| Play
+  | rowspan="7"| Play
-  |rowspan="13"| Client
+  | rowspan="7"| Client
-  |colspan="2"| Item Damage
+  | Entity ID
-  |colspan="2"| VarInt
+  | VarInt
-  | The damage value (map ID) of the map being modified
+  |
   |-
-  |colspan="2"| Scale
+  | Effect ID
-  |colspan="2"| Byte
+  | VarInt
- | From 0 for a fully zoomed-in map (1 block per pixel) to 4 for a fully zoomed-out map (16 blocks per pixel)
+  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
- |-
- |colspan="2"| Tracking Position
- |colspan="2"| Boolean
- | Specifies whether the icons are shown
- |-
-  |colspan="2"| Icon Count
- |colspan="2"| VarInt
- | Number of elements in the following array
   |-
-  |rowspan="3"| Icon
+  | Amplifier
- | Direction And Type
- |rowspan="3"| Array
   | Byte
-  | 0xF0 = Direction, 0x0F = Type
+  | Notchian client displays effect level as Amplifier + 1.
   |-
-  | X
+  | Duration
-  | Byte
+  | VarInt
-  |
+  | Duration in ticks. (-1 for infinite)
   |-
-  | Z
+  | Flags
   | Byte
-  |
+  | Bit field, see below.
-  |-
+  |- {{removed}}
-  |colspan="2"| Columns
+  | Has Factor Data
-  |colspan="2"| Byte
+  | Boolean
-  | Number of columns updated
+  | Used in DARKNESS effect
-  |-
+  |- {{removed}}
-  |colspan="2"| Rows
+  | Factor Codec
- |colspan="2"| Optional Byte
+  | NBT Tag
-  | Only if Columns is more than 0; number of rows updated
+  | See below
-  |-
- |colspan="2"| X
- |colspan="2"| Optional Byte
- | Only if Columns is more than 0; x offset of the westernmost column
- |-
- |colspan="2"| Z
- |colspan="2"| Optional Byte
- | Only if Columns is more than 0; z offset of the northernmost row
- |-
- |colspan="2"| Length
- |colspan="2"| Optional VarInt
- | Only if Columns is more than 0; length of the following array
- |-
- |colspan="2"| Data
- |colspan="2"| Optional Array of Unsigned Byte
- | Only if Columns is more than 0; see {{Minecraft Wiki|Map item format}}
   |}
-For icons, a direction of 0 is a vertical icon and increments by 22.5&deg; (360/16).
+{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
+Within flags:
-Types are based off of rows and columns in <code>map_icons.png</code>:
+* 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 [[Entity_metadata#Living Entity|"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.
+* {{change||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.}}
-{| class="wikitable"
+{{change|Factor Data|}}
+{| class="wikitable" {{removed}}
+ !Name
+ !Type
+ !style="width: 250px;" colspan="2"| Notes
   |-
-  ! Icon type
+  | padding_duration
-  ! Result
+  | TAG_INT
+ |
   |-
-  | 0
+  | factor_start
-  | White arrow (players)
+ | TAG_FLOAT
+  |
   |-
-  | 1
+  | factor_target
-  | Green arrow (item frames)
+ | TAG_FLOAT
+  |
   |-
-  | 2
+  | factor_current
-  | Red arrow
+  | TAG_FLOAT
-  |-
+  |
- | 3
- | Blue arrow
- |-
- | 4
- | White cross
- |-
- | 5
- | Red pointer
   |-
-  | 6
+  | effect_changed_timestamp
-  | White circle (off-map players)
+  | TAG_INT
   |-
-  |style="background-color: #d9ead3;"| 7
+  | factor_previous_frame
-  |style="background-color: #d9ead3;"| Small white circle (far-off-map players)
+  | TAG_FLOAT
   |-
-  |style="background-color: #d9ead3;"| 8
+  | had_effect_last_tick
- |style="background-color: #d9ead3;"| Mansion
+  | TAG_BOOLEAN
- |-
- |style="background-color: #d9ead3;"| 9
- |style="background-color: #d9ead3;"| Temple
- |-
- | 10-15
-  | Unused (blue square)
   |}
+=== Serverbound ===
-==== Collect Item ====
+==== Chat Command ====
-Sent by the server when someone picks up an item lying on the ground — its sole purpose appears to be the animation of the item flying towards you. It doesn't destroy the entity in the client memory, and it doesn't add it to your inventory. The server only checks for items to be picked up after each [[#Player Position|Player Position]] (and [[#Player Position And Look|Player Position And Look]]) packet sent by the client.
 {| class="wikitable"
@@ Line 1,297: / Line 1,293: @@
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="3"| 0x48
+  | rowspan="8"| 0x04
-  |rowspan="3"| Play
+  | rowspan="8"| Play
-  |rowspan="3"| Client
+  | rowspan="8"| Server
-  | Collected Entity ID
+  | colspan="2"| Command
-  | VarInt
+  | colspan="2"| {{Type|String}} (256)
-  |
+  | colspan="2"| The command typed by the client.
-  |-
+  |- {{removed}}
-  | Collector Entity ID
+  | colspan="2"| Timestamp
-  | VarInt
+  | colspan="2"| {{Type|Long}}
-  |
+  | colspan="2"| The timestamp that the command was executed.
-  |-
+  |- {{removed}}
-  |style="background-color: #d9ead3;"|Pickup Item Count
+ | colspan="2"| Salt
-  |style="background-color: #d9ead3;"|VarInt
+ | colspan="2"| {{Type|Long}}
-  |style="background-color: #d9ead3;"|Seems to be 1 for XP orbs, otherwise the number of items in the stack.
+  | colspan="2"| The salt for the following argument signatures.
+ |- {{removed}}
+ | colspan="2"| Array length
+  | colspan="2"| {{Type|VarInt}}
+  | colspan="2"| Number of entries in the following array. The maximum length in Notchian server is 8.
+ |- {{removed}}
+ | rowspan="2"| Array of argument signatures
+ | Argument name
+ | rowspan="2"| {{Type|Array}} (8)
+ | {{Type|String}} (16)
+ | The name of the argument that is signed by the following signature.
+ |- {{removed}}
+ | Signature
+ | {{Type|Byte Array}} (256)
+ | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
+ |- {{removed}}
+ | colspan="2"| Message Count
+ | colspan="2"| {{Type|VarInt}}
+ | colspan="2"|
+ |- {{removed}}
+ | colspan="2"| Acknowledged
+ | colspan="2"| {{Type|Fixed BitSet}} (20)
+ | colspan="2"|
   |}
-=== Serverbound ===
-==== Chat Message (serverbound) ====
+==== Signed Chat Command ====
-Used to send a chat message to the server.  The message may not be longer than {{change|100|256}} characters or else the server will kick the client.
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
+ |-
+ | rowspan="8"| 0x05
+ | rowspan="8"| Play
+ | rowspan="8"| Server
+ | colspan="2"| Command
+ | colspan="2"| String(256)
+ | The command typed by the client.
+ |-
+ | colspan="2"| Timestamp
+ | colspan="2"| Long
+ | The timestamp that the command was executed. Milliseconds since the Unix epoch.
+ |-
+ | colspan="2"| Salt
+ | colspan="2"| Long
+ | The salt for the following argument signatures.
+ |-
+ | colspan="2"| Argument Signature Count
+ | colspan="2"| VarInt
+ | Number of elements in the following array. The maximum length in Notchian server is 8.
+ |-
+ | rowspan="2"| Argument Signatures
+ | Name
+  | rowspan="2"| Array
+ | String(16)
+ | The name of the argument that is signed by the following signature.
+ |-
+ | Signature
+ | ByteArray(256)
+ | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
+ |-
+ | colspan="2"| Seen Messages Offset
+ | colspan="2"| VarInt
+ |
+ |-
+ | colspan="2"| Seen Messages Acknowledged
+ | colspan="2"| Fixed BitSet(20)
+ |
+ |}
+==== Cookie Response (play) ====
-If the message starts with a <code>/</code>, the server will attempt to interpret it as a command.  Otherwise, the server will broadcast the same chat message to all players on the server (including the player that sent the message), prepended with player's name.  Specifically, it will respond with a translate [[chat]] component, "<code>chat.type.text</code>" with the first parameter set to the display name of the player (including some chat component logic to support clicking the name to send a PM) and the second parameter set to the message.
+Response to a [[#Cookie_Request_(play)|Cookie Request (play)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="1"| 0x02
+  | rowspan="4"| 0x11
-  |rowspan="1"| Play
+  | rowspan="4"| Play
-  |rowspan="1"| Server
+  | rowspan="4"| Server
-  | Message
+  | colspan="2"| Key
-  | String
+  | colspan="2"| Identifier
-  | The client sends the raw input, not a [[Chat]] component
+  | The identifier of the cookie.
+ |-
+ | colspan="2"| Has Payload
+ | colspan="2"| Boolean
+ | The payload is only present if the cookie exists on the client.
+ |-
+ | colspan="2"| Payload Length
+ | colspan="2"| Optional VarInt
+ | Length of the following byte array.
+ |-
+ | colspan="2"| Payload
+ | colspan="2"| Optional Byte Array (5120)
+ | The data of the cookie, if any.
   |}
-==== Player Block Placement ====
+==== Debug Sample Subscription ====
-{| class="wikitable"
+{| class="wikitable" {{added}}
- |-
   ! Packet ID
   ! State
@@ Line 1,352: / Line 1,426: @@
   ! Notes
   |-
-  |rowspan="6"| 0x1C
+  | 0x13
-  |rowspan="6"| Play
+  | Play
-  |rowspan="6"| Server
+  | Server
-  | Location
+  | Sample Type
- | Position
- | Block position
- |-
- | Face
- | VarInt Enum
- | The face on which the block is placed (as documented at [[#Player Digging|Player Digging]])
- |-
- | Hand
   | VarInt Enum
-  | The hand from which the block is placed; 0: main hand, 1: off hand
+  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
- |-
- | Cursor Position X
- | {{change|Unsigned Byte|Float}}
- | The position of the crosshair on the block, from 0 to 1 increasing from west to east
- |-
- | Cursor Position Y
- | {{change|Unsigned Byte|Float}}
- | The position of the crosshair on the block, from 0 to 1 increasing from bottom to top
- |-
- | Cursor Position Z
- | {{change|Unsigned Byte|Float}}
- | The position of the crosshair on the block, from 0 to 1 increasing from north to south
   |}
-== Status ==
+[[Category:Minecraft Modern]]
-=== Clientbound ===
-No changes so far.
-=== Serverbound ===
-No changes so far.
-== Login ==
-=== Clientbound ===
-No changes so far.
-=== Serverbound ===
-No changes so far.

Difference between revisions of "Pre-release protocol"

Latest revision as of 22:19, 9 April 2024

Contents

Contents

Data types

Packets

New/modified data types

Entity Metadata

Living Entity

Wolf

Armadillo

Block Actions

Inventories

Plugin Channels

Handshake

Serverbound

Handshake

Status

Clientbound

Serverbound

Login

Clientbound

Encryption Request

Cookie Request (login)

Serverbound

Cookie Response (login)

Configuration

Clientbound

Cookie Request (configuration)

Reset Chat

Registry Data

Store Cookie (configuration)

Transfer (configuration)

Clientbound Known Packs

Serverbound

Cookie Response (configuration)

Serverbound Known Packs

Play

Clientbound

Cookie Request (play)

Debug Sample

Login (play)

Respawn

Store Cookie (play)

Transfer (play)

Update Attributes

Entity Effect

Serverbound

Chat Command

Signed Chat Command

Cookie Response (play)

Debug Sample Subscription

Navigation menu

Search