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|1.8.8, protocol 47]]) to the current pre-release (currently [[Protocol version numbers|15w31c, protocol 51]]). 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.
-== Protocol history ==
+== Contents ==
-None so far.
+<div style="float:right;">__TOC__</div>
-== New/modified data types ==
+=== Data types ===
-None so far.
+No changes so far.
-== Handshaking ==
+=== Packets ===
-=== Clientbound ===
+{| class="wikitable"
+ ! ID
+ ! Packet name
+ !colspan="2"| Documentation
+ |-
+ !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|0x16|Cookie Request (Play)|rel=added}}
+ {{PacketList|{{change|0x16|0x17}}|Set Cooldown|pre=unchanged}}
+ {{PacketList|{{change|0x17|0x18}}|Chat Suggestions|pre=unchanged}}
+ {{PacketList|{{change|0x18|0x19}}|Clientbound Plugin Message (play)|pre=unchanged}}
+ {{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|0x04|Chat Command}}
+ {{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 ==
 No changes so far.
-=== Serverbound ===
+== Entity Metadata ==
-==== Handshake ====
-This causes the server to switch into the target state.
+{{#vardefine: meta_prerelease | 1}}
-{| class="wikitable"
+{{Metadata type definition/begin}}
-  ! Packet ID
+  ! Value
- ! State
- ! Bound To
- ! Field Name
- ! Field Type
   ! Notes
-  |-
+{{Metadata type definition|Byte}}
-  |rowspan="4"| 0x00
+ | {{Type|Byte}}
-  |rowspan="4"| Handshaking
+ |
-  |rowspan="4"| Server
+{{Metadata type definition|VarInt}}
-  | Protocol Version
+ | {{Type|VarInt}}
-  | VarInt
+ |
-  | See [[protocol version numbers]] (currently {{Change|47|51}})
+{{Metadata type definition|VarLong}}
-  |-
+ | {{Type|VarLong}}
- | Server Address
+ |
-  | String
+{{Metadata type definition|Float}}
-  | hostname or IP, e.g. localhost or 127.0.0.1<!-- does this support IPv6? -->
+ | {{Type|Float}}
-  |-
+ |
-  | Server Port
+{{Metadata type definition|String}}
-  | Unsigned Short
+ | {{Type|String}}
-  | default is 25565
+ |
-  |-
+{{Metadata type definition|Text Component}}
-  | Next State
+ | {{Type|Text Component}}
-  | VarInt
+  |
-  | 1 for [[#Status|status]], 2 for [[#Login|login]]
+{{Metadata type definition|Optional Text Component}}
+  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Text Component}})
+ | Text Component is present if the Boolean is set to true.
+{{Metadata type definition|Slot}}
+ | {{Type|Slot}}
+ |
+{{Metadata type definition|Boolean}}
+ | {{Type|Boolean}}
+ |
+{{Metadata type definition|Rotations}}
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
+ | rotation on x, rotation on y, rotation on z
+{{Metadata type definition|Position}}
+ | {{Type|Position}}
+ |
+{{Metadata type definition|Optional Position}}
+ | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Position}})
+ | Position is present if the Boolean is set to true.
+{{Metadata type definition|Direction}}
+ | {{Type|VarInt}} {{Type|Enum}}
+ | Down = 0, Up = 1, North = 2, South = 3, West = 4, East = 5
+{{Metadata type definition|Optional UUID}}
+  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|UUID}})
+ | UUID is present if the Boolean is set to true.
+{{Metadata type definition|Block State}}
+ | {{Type|VarInt}}
+ | An ID in the block state registry.
+{{Metadata type definition|Optional Block State}}
+ | {{Type|VarInt}}
+ | 0 for absent (air is unrepresentable); otherwise, an ID in the block state registry.
+{{Metadata type definition|NBT}}
+  | {{Type|NBT}}
+  |
+{{Metadata type definition|Particle}}
+  | ({{Type|VarInt}}, Varies)
+  | particle type (an ID in the <code>minecraft:particle_type</code> registry), particle data (See [[Particles]].)
+{{Metadata type definition|Particles|rel=added}}
+ | ({{Type|VarInt}}, Array of Particle)
+  | length of array, particle data (See directly above.)
+{{Metadata type definition|Villager Data}}
+  | ({{Type|VarInt}}, {{Type|VarInt}}, {{Type|VarInt}})
+  | villager type, villager profession, level (See below.)
+{{Metadata type definition|Optional VarInt}}
+ | {{Type|VarInt}}
+ | 0 for absent; 1 + actual value otherwise. Used for entity IDs.
+{{Metadata type definition|Pose}}
+ | {{Type|VarInt}} {{Type|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{{change||2=, SLIDING = 15, SHOOTING = 16, INHALING = 17}}
+{{Metadata type definition|Cat Variant}}
+ | {{Type|VarInt}}
+ | An ID in the <code>minecraft:cat_variant</code> registry.
+{{Metadata type definition|Wolf Variant|rel=added}}
+ | {{Type|VarInt}}
+ | An ID in the <code>minecraft:wolf_variant</code> registry.
+{{Metadata type definition|Frog Variant}}
+  | {{Type|VarInt}}
+  | An ID in the <code>minecraft:frog_variant</code> registry.
+{{Metadata type definition|Optional Global Position}}
+  | ({{Type|Boolean}}, {{Type|Optional}} {{Type|Identifier}}, {{Type|Optional}} {{Type|Position}})
+  | dimension identifier, position; only if the Boolean is set to true.
+{{Metadata type definition|Painting Variant}}
+  | {{Type|VarInt}}
+  | An ID in the <code>minecraft:painting_variant</code> registry.
+{{Metadata type definition|Sniffer State}}
+  | {{Type|VarInt}} {{Type|Enum}}
+  | IDLING = 0, FEELING_HAPPY = 1, SCENTING = 2, SNIFFING = 3, SEARCHING = 4, DIGGING = 5, RISING = 6
+{{Metadata type definition|Armadillo State|rel=added}}
+ | {{Type|VarInt}} {{Type|Enum}}
+ | IDLE = 0, ROLLING = 1, SCARED = 2
+{{Metadata type definition|Vector3}}
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}})
+ | x, y, z
+{{Metadata type definition|Quaternion}}
+ | ({{Type|Float}}, {{Type|Float}}, {{Type|Float}}, {{Type|Float}})
+ | x, y, z, w
   |}
-== Play ==
+=== Living Entity ===
+TODO: This has changed to use the PARTICLES attribute
-=== Clientbound ===
+=== Wolf ===
-==== Entity Equipment ====
+{{Metadata inherit|Wolf|inherits=Tameable Animal}}
 {| class="wikitable"
-  ! Packet ID
+  ! Index
-  ! State
+  ! Type
-  ! Bound To
+  !style="width: 250px;" colspan="2"| Meaning
-  ! Field Name
+  ! Default
-  ! Field Type
+ |- {{added}}
-  ! Notes
+ | {{Metadata id|}}
+ | {{Metadata type|Wolf Variant}}
+ |colspan="2"| Wolf Variant
+ | PALE
+ |-
+ | {{Metadata id|}}
+ | {{Metadata type|Boolean}}
+  |colspan="2"| Is begging
+  | false
   |-
-  |rowspan="3"| 0x04
+  | {{Metadata id|}}
-  |rowspan="3"| Play
+  | {{Metadata type|VarInt}}
-  |rowspan="3"| Client
+  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
- | Entity ID
+  | 14 (Red)
- | VarInt
-  | Entity's EID
   |-
-  | Slot
+  | {{Metadata id|}}
-  | {{Change|Short|VarInt}}
+  | {{Metadata type|VarInt}}
-  | Equipment slot. 0: main hand, {{Change||1: off hand}}, {{Change|1–4|2–5}}: armor slot (2: boots, 3: leggings, 4: chestplate, 5: helmet)
+  |colspan="2"| Anger time
+ | 0
+ |}
+=== Armadillo ===
+{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
+{| class="wikitable" {{added}}
+ ! Index
+ ! Type
+ !style="width: 250px;" colspan="2"| Meaning
+ ! Default
   |-
-  | Item
+  | {{Metadata id|added}}
-  | [[Slot Data|Slot]]
+ | {{Metadata type|Armadillo State}}
-  | Item in slot format
+  |colspan="2"| Armadillo State
+  | IDLE
   |}
-==== Spawn Player ====
+== Block Actions ==
+No changes so far.
+== Inventories ==
-This packet is sent by the server when a player comes into visible range, ''not'' when a player joins.
+No changes so far.
-This packet must be sent after the [[#Player List Item|Player List Item]] ([[#Play|Play]], 0x38, clientbound) packet that adds the player data for the client to use when spawning a player. The tab includes skin/cape data.
+== Plugin Channels ==
-Servers can, however, safely spawn player entities for players not in visible range. The client appears to handle it correctly.
+No changes so far.
-When in online-mode the UUIDs must be valid and have valid skin blobs, in offline-mode UUID v3 is used.
+== Handshake ==
-For NPCs UUID v2 should be used. Note:
+=== Serverbound ===
- <+Grum> i will never confirm this as a feature you know that :)
+==== Handshake ====
-In an example UUID, <code>xxxxxxxx-xxxx-Yxxx-xxxx-xxxxxxxxxxxx</code>, the UUID version is specified by <code>Y</code>. So, for UUID v3, <code>Y</code> will always be <code>3</code>, and for UUID v2, <code>Y</code> will always be <code>2</code>.
+This causes the server to switch into the target state.
 {| class="wikitable"
@@ Line 105: / Line 396: @@
   ! Notes
   |-
-  |rowspan="9"| 0x0C
+  | rowspan="4"| 0x00
-  |rowspan="9"| Play
+  | rowspan="4"| Handshaking
-  |rowspan="9"| Client
+  | rowspan="4"| Server
-  | Entity ID
+  | Protocol Version
-  | VarInt
+  | [[#Definitions:varint|VarInt]]
-  | Player's EID
+  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
   |-
-  | Player UUID
+  | Server Address
-  | UUID
+  | [[#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.
   |-
-  | X
+  | Server Port
-  | Int
+  | [[#Definitions:unsigned-short|Unsigned Short]]
- | Player X as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+ | Default is 25565. The Notchian server does not use this information.
   |-
-  | Y
+  | Next State
-  | Int
+  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
- | Player Y as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
-  |-
- | Z
- | Int
- | Player Z as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
- |-
- | Yaw
- | Angle
- |
- |-
- | Pitch
- | Angle
- |
- |- style="background-color: #f4cccc; text-decoration: line-through;"
- | Current Item
- | Short
- | The item the player is currently holding. Note that this should be 0 for “no item”, unlike -1 used in other packets.
- |-
- | Metadata
- | [[Entities#Entity Metadata Format|Metadata]]
- |
   |}
-{{Warning|A negative Current Item crashes clients}}
+== Status ==
-{{Warning|The client will crash if no Metadata is sent}}
+=== Clientbound ===
-==== Spawn Object ====
+No changes so far.
-Sent by the server when an object/vehicle is created.
+=== Serverbound ===
+No changes so far.
+== Login ==
+=== Clientbound ===
+==== Encryption Request ====
 {| class="wikitable"
@@ Line 161: / Line 440: @@
   ! Notes
   |-
-  |rowspan="13"| 0x0E
+  | rowspan="6"| 0x01
-  |rowspan="13"| Play
+  | rowspan="6"| Login
-  |rowspan="13"| Client
+  | rowspan="6"| Client
-  | Entity ID
+  | Server ID
-  | VarInt
+  | {{Type|String}} (20)
- | EID of the object
+  | Appears to be empty.
- |- style="background-color: #d9ead3;"
- | Object UUID
- | UUID
- |
- |-
- | Type
- | Byte
-  | The type of object (See [[Entities#Objects]])
   |-
-  | X
+  | Public Key Length
-  | Int
+  | {{Type|VarInt}}
-  | X position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+  | Length of Public Key.
   |-
-  | Y
+  | Public Key
-  | Int
+  | {{Type|Byte Array}}
-  | Y position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+  | The server's public key, in bytes.
   |-
-  | Z
+  | Verify Token Length
-  | Int
+  | {{Type|VarInt}}
-  | Z position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
+  | Length of Verify Token. Always 4 for Notchian servers.
   |-
-  | Pitch
+  | Verify Token
-  | Angle
+  | {{Type|Byte Array}}
+ | A sequence of random bytes generated by the server.
+ |- {{added}}
+ | Should Authenticate
+ | {{Type|Boolean}}
   |
- |-
- | Yaw
- | Angle
- |
- |- style="background-color: #f4cccc; text-decoration: line-through;"
- | Data
- | [[Object Data]]
- |
- |-  style="background-color: #d9ead3;"
- | Info
- | Int
- | Depends on Type; see [[Object Data#Meaning of int field]]
- |-  style="background-color: #d9ead3;"
- | Velocity X
- | Short
- |
- |-  style="background-color: #d9ead3;"
- | Velocity Y
- | Short
- |
- |-  style="background-color: #d9ead3;"
- | Velocity Z
- | Short
- |
   |}
-==== Spawn Mob ====
+==== Cookie Request (login) ====
-Sent by the server when a mob entity is spawned.
+Requests a cookie that was previously stored.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="13"| 0x0F
+  | rowspan="1"| 0x05
-  |rowspan="13"| Play
+  | rowspan="1"| Login
-  |rowspan="13"| Client
+  | rowspan="1"| Client
-  | Entity ID
+  | colspan="2"| Key
- | VarInt
+  | colspan="2"| Identifier
-  |
+  | The identifier of the cookie.
- |- style="background-color: #d9ead3;"
- | Entity UUID
- | UUID
- |
- |-
- | Type
- | Unsigned Byte
-  | The type of mob. See [[Entities#Mobs]]
- |-
- | X
- | Int
- | X position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
- |-
- | Y
- | Int
- | Y position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
- |-
- | Z
- | Int
- | Z position as a [[Data Types#Fixed-point numbers|Fixed-Point number]]
- |-
- | Yaw
- | Angle
- |
- |-
- | Pitch
- | Angle
- |
- |-
- | Head Pitch
- | Angle
- |
- |-
- | Velocity X
- | Short
- | Same units as [[Protocol#Entity Velocity|Entity Velocity]]
- |-
- | Velocity Y
- | Short
- | Same units as [[Protocol#Entity Velocity|Entity Velocity]]
- |-
- | Velocity Z
- | Short
- | Same units as [[Protocol#Entity Velocity|Entity Velocity]]
- |-
- | Metadata
- | [[Entities#Entity Metadata Format|Metadata]]
- |
   |}
-==== Combat Event ====
+=== Serverbound ===
+==== Cookie Response (login) ====
+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.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  !colspan="2"| Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="8"| 0x42
+  | rowspan="4"| 0x04
-  |rowspan="8"| Play
+  | rowspan="4"| Login
-  |rowspan="8"| Client
+  | rowspan="4"| Server
-  |colspan="2"| Event
+  | colspan="2"| Key
-  | VarInt
+  | colspan="2"| Identifier
-  | Determines the layout of the remaining packet
+  | The identifier of the cookie.
   |-
-  ! Event
+  | colspan="2"| Has Payload
-  ! Field Name
+  | colspan="2"| Boolean
-  !
+  | The payload is only present if the cookie exists on the client.
- !
   |-
-  | 0: enter combat
+  | colspan="2"| Payload Length
- | ''no fields''
+  | colspan="2"| VarInt
- | ''no fields''
+  | Length of the following byte array.
- |
- |-
- |rowspan="2"| 1: end combat
- | Duration
- | VarInt
- |
- |-
- | Entity ID
- | Int
- |
-  |-
- |rowspan="3"| 2: entity dead
- | Player ID
- | VarInt
-  |
- |-
- | Entity ID
- | Int
- |
   |-
-  | Message
+  | colspan="2"| Payload
-  | {{Change|String|[[Chat]]}}
+  | colspan="2"| Optional Byte Array (5120)
-  |
+  | The data of the cookie, if any.
   |}
-==== {{Change|Update Entity NBT|}} ====
+== Configuration ==
+=== Clientbound ===
-==== {{Change||Boss Bar}} ====
+==== Cookie Request (configuration) ====
-This packet replaces Update Entity NBT packet which has been removed.
+Requests a cookie that was previously stored.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  !colspan="2"| Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="15"| 0x49
+  | rowspan="1"| 0x00
-  |rowspan="15"| Play
+  | rowspan="1"| Configuration
-  |rowspan="15"| Client
+  | rowspan="1"| Client
-  |colspan="2"| UUID
+  | colspan="2"| Key
- | UUID
+  | colspan="2"| Identifier
- | Unique ID for this bar
+  | The identifier of the cookie.
- |-
-  |colspan="2"| Action
- | VarInt
-  | Determines the layout of the remaining packet
- |-
- ! Action
- ! Field Name
- !
- !
- |-
- |rowspan="5"| 0: add
- | Title
- | [[Chat]]
- |
- |-
- | Health
- | Float
- |
- |-
- | Color
- | VarInt
- | Color ID (see below)
- |-
- | Dividers
- | VarInt
- |
- |-
- | Flags
- | Unsigned Byte
- | Bit mask: 0x1 should darken sky, 0x2: is dragon bar
- |-
- | 1: remove
- | ''no fields''
- | ''no fields''
- | Removes this boss bar
- |-
- | 2: update health
- | Health
- | Float
- |
- |-
- | 3: update title
- | Title
- | [[Chat]]
- |
- |-
- |rowspan="2"| 4: update style
- | Color
- | VarInt
- |
- |-
- | Dividers
- | VarInt
- |
- |-
- | 5: update flags
- | Flags
- | Unsigned Byte
- |
- |-
- |}
-{| class="wikitable"
- ! ID
- ! Color
- |-
- | 0
- | Pink(ish)
- |-
- | 1
- | Cyan
- |-
- | 2
- | Red
- |-
- | 3
- | Lime
- |-
- | 4
- | Yellow
- |-
- | 5
- | Purple
- |-
- | 6
- | White
   |}
-=== Serverbound ===
+==== Reset Chat ====
-==== Use Entity ====
+{| class="wikitable" {{added}}
-This packet is sent from the client to the server when the client attacks or right-clicks another entity (a player, minecart, etc).
-A Notchian server only accepts this packet if the entity being attacked/used is visible without obstruction and within a 4-unit radius of the player's position.
-Note that middle-click in creative mode is interpreted by the client and sent as a [[#Creative Inventory Action|Creative Inventory Action]] packet instead.
-{| class="wikitable"
   ! Packet ID
   ! State
@@ Line 462: / Line 556: @@
   ! Notes
   |-
-  |rowspan="6"| 0x02
+  | 0x06
- |rowspan="6"| Play
+  | Configuration
- |rowspan="6"| Server
+  | Client
-  | Target
+  | colspan="3"| ''no fields''
-  | VarInt
-  |
- |-
- | Type
- | VarInt
- | 0: interact, 1: attack, 2: interact at
- |-
- | Target X
- | Optional Float
- | Only if Type is interact at
- |-
- | Target Y
- | Optional Float
- | Only if Type is interact at
- |-
- | Target Z
- | Optional Float
- | Only if Type is interact at
- |- style="background-color: #d9ead3;"
- | Hand
- | Optional VarInt
- | Only if Type is interact or interact at; 0: main hand, 1: off hand
   |}
-==== Player Digging ====
+==== Registry Data ====
-Sent when the player mines a block. A Notchian server only accepts digging packets with coordinates within a 6-unit radius of the player's position.
+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>.}}
 {| class="wikitable"
@@ Line 498: / Line 570: @@
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="3"| 0x07
+  | rowspan="6"| 0x07
-  |rowspan="3"| Play
+  | rowspan="6"| Configuration
-  |rowspan="3"| Server
+ | rowspan="6"| Client
-  | Status
+ |{{removed}} colspan="2"| Registry Codec
-  | Byte
+ |{{removed}} colspan="2"| {{Type|NBT}} (Compound)
-  | The action the player is taking against the block (see below)
+ |{{removed}}| See [[Registry Data]].
-  |-
+ |- {{added}}
-  | Location
+ | colspan="2"| Registry ID
-  | Position
+ | colspan="2"| Identifier
-  | Block position
+ |
-  |-
+ |- {{added}}
-  | Face
+ | colspan="2"| Entry Count
-  | Byte
+ | colspan="2"| VarInt
-  | The face being hit (see below)
+ | Number of entries in the following array.
+ |- {{added}}
+  | rowspan="3"| Entries
+ | Entry ID
+  | rowspan="3"| Array
+  | Identifier
+  |
+  |- {{added}}
+  | Has Data
+  | Boolean
+  | Whether the entry has any data following.
+  |- {{added}}
+  | Data
+  | NBT Tag
+  | Entry data. Only present if Has Data is true.
   |}
-Status can be one of seven values:
+==== Store Cookie (configuration) ====
-{| class="wikitable"
+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.
-  ! Meaning
-  ! Value
+{| class="wikitable" {{added}}
+ ! Packet ID
+ ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+  ! Notes
   |-
-  | Started digging
+  | rowspan="2"| 0x0A
-  | <code>0</code>
+ | rowspan="2"| Configuration
+ | rowspan="2"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+  | The identifier of the cookie.
   |-
-  | Cancelled digging
+  | colspan="2"| Payload
- | <code>1</code>
+  | colspan="2"| ByteArray(5120)
- |-
+  | The data of the cookie.
- | Finished digging
- | <code>2</code>
- |-
- | Drop item stack
- | <code>3</code>
- |-
- | Drop item
- | <code>4</code>
- |-
- | Shoot arrow / finish eating
-  | <code>5</code>
- |- style="background-color: #d9ead3;"
- | Swap item in Hand
-  | <code>6</code>
   |}
-Notchian clients send a 0 (started digging) when they start digging and a 2 (finished digging) once they think they are finished. If digging is aborted, the client simply sends a 1 (cancel digging).
+==== Transfer (configuration) ====
-Status code 4 (drop item) is a special case. In-game, when you use the Drop Item command (keypress 'q'), a dig packet with a status of 4, Location set to 0/0/0, and Face set to 0, is sent from client to server. Status code 3 is similar, but drops the entire stack.
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-Status code 5 (shoot arrow / finish eating) is also a special case. Location is set to 0/0/0 like above, but the face field is set to 255.
+{| class="wikitable" {{added}}
+ ! Packet ID
-Status code 6 is another special case. Used to swap or assign an item to the second hand. Location is set to 0/0/0 and Face is set to 0.
+ ! State
+ ! Bound To
-The Face field can be one of six values, representing the face being hit:
+ ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
-{| class="wikitable"
+ ! Notes
   |-
-  ! Value
+  | rowspan="2"| 0x0B
-  | 0
+  | rowspan="2"| Configuration
-  | 1
+  | rowspan="2"| Client
-  | 2
+  | colspan="2"| Host
-  | 3
+  | colspan="2"| String
- | 4
+  | The hostname of IP of the server.
-  | 5
   |-
- ! Offset
+  | colspan="2"| Port
-  | -Y
+  | colspan="2"| VarInt
- | +Y
+  | The port of the server.
-  | -Z
- | +Z
- | -X
-  | +X
   |}
-==== {{Change||Use Item}} ====
+==== Clientbound Known Packs ====
+{| class="wikitable" {{added}}
-Sent when pressing the Use Item key (default: right click) with an item in hand.
-{| class="wikitable"
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="1"| 0x08
+  | rowspan="4"| 0x0E
-  |rowspan="1"| Play
+  | rowspan="4"| Configuration
-  |rowspan="1"| Server
+  | rowspan="4"| Client
-  | Hand
+  | colspan="2"| Known Pack Count
-  | VarInt
+  | colspan="2"| VarInt
-  | Hand used for the animation
+  | The number of known packs in the following array.
+ |-
+ | rowspan="3"| Known Packs
+ | Namespace
+ | rowspan="3"| Array
+ | String
+ |
+ |-
+ | ID
+ | String
+ |
+ |-
+ | Version
+ | String
+ |
   |}
-==== Player Block Placement ====
+=== Serverbound ===
-{| class="wikitable"
+==== Cookie Response (configuration) ====
- |-
+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" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="6"| {{Change|0x08|0x09}}
+  | rowspan="4"| 0x01
-  |rowspan="6"| Play
+  | rowspan="4"| Configuration
-  |rowspan="6"| Server
+  | rowspan="4"| Server
-  | Location
+  | colspan="2"| Key
- | Position
+  | colspan="2"| Identifier
-  | Block position
+  | The identifier of the cookie.
- |-
- | Face
- | {{Change|Byte|VarInt}}
-  | The face on which the block is placed (see above)
   |-
-  | {{Change|Held Item|Hand}}
+  | colspan="2"| Has Payload
-  | {{Change|[[Slot Data|Slot]]|VarInt}}
+  | colspan="2"| Boolean
-  | The hand from which the block is placed; 0: main hand, 1: off hand
+  | The payload is only present if the cookie exists on the client.
   |-
-  | Cursor Position X
+  | colspan="2"| Payload Length
-  | Byte
+  | colspan="2"| VarInt
-  | The position of the crosshair on the block
+  | Length of the following byte array.
   |-
-  | Cursor Position Y
+  | colspan="2"| Payload
- | Byte
+  | colspan="2"| Optional Byte Array (5120)
- |
+  | The data of the cookie, if any.
-  |-
- | Cursor Position Z
- | Byte
-  |
   |}
-In normal operation (i.e. placing a block), this packet is sent once, with the values set normally.
+==== 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.
-This packet has a special case where X, Y, Z, and Direction are all -1. (Note that Y is unsigned so set to 255.) This special packet indicates that the currently held item for the player should have its state updated such as eating food, pulling back bows, using buckets, etc.
+== Play ==
-Special note on using buckets: When using buckets, the Notchian client might send two packets: first a normal and then a special case. The first normal packet is sent when you're looking at a block (e.g. the water you want to scoop up). This normal packet does not appear to do anything with a Notchian server. The second, special case packet appears to perform the action — based on current position/orientation and with a distance check — it appears that buckets can only be used within a radius of 6 units.
+=== Clientbound ===
-==== Held Item Change ====
+==== Cookie Request (play) ====
-Sent when the player changes the slot selection.
+Requests a cookie that was previously stored.
-{| 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"| {{Change|0x09|0x0A}}
+  | rowspan="1"| 0x16
-  |rowspan="1"| Play
+  | rowspan="1"| Play
-  |rowspan="1"| Server
+  | rowspan="1"| Client
-  | Slot
+  | colspan="2"| Key
-  | Short
+  | colspan="2"| Identifier
-  | The slot which the player has selected (0–8)
+  | The identifier of the cookie.
   |}
-==== Animation ====
+==== Debug Sample ====
-Sent when the player's arm swings
+{| class="wikitable" {{added}}
-{| class="wikitable"
   ! Packet ID
   ! State
@@ Line 672: / Line 755: @@
   ! Notes
   |-
-  |rowspan="1"| {{Change|0x0A|0x0B}}
+  | rowspan="3"| 0x1B
-  |rowspan="1"| Play
+  | rowspan="3"| Play
-  |rowspan="1"| Server
+  | rowspan="3"| Client
-  |style="background-color: #d9ead3;"| Hand
+ | Sample Length
-  |style="background-color: #d9ead3;"| VarInt
+ | VarInt
-  |style="background-color: #d9ead3;"| Hand used for the animation
+ | 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).
   |}
-==== Entity Action ====
+==== Login (play) ====
-Sent at least when crouching, leaving a bed, or sprinting. To send action animation to client use 0x28. The client will send this with Action ID = 3 when “Leave Bed” is clicked.
 {| class="wikitable"
@@ Line 692: / Line 781: @@
   ! Notes
   |-
-  |rowspan="3"| {{Change|0x0B|0x0C}}
+  | rowspan="22"| 0x2B
-  |rowspan="3"| Play
+  | rowspan="22"| Play
-  |rowspan="3"| Server
+  | rowspan="22"| Client
   | Entity ID
-  | VarInt
+  | {{Type|Int}}
-  | Player ID
+ | 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.
+ |-
+ | Dimension Type
+ | {{change|Identifier|VarInt}}
+ | The ID of the type of dimension in the <code>minecraft:dimension_type</code> registry, defined by the 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.
   |-
-  | Action ID
+  | Portal cooldown
-  | VarInt
+  | {{Type|VarInt}}
-  | The ID of the action, see below
+  | The number of ticks until the player can use the portal again.
   |-
-  | Jump Boost
+  | Enforces Secure Chat
-  | VarInt
+  | {{Type|Boolean}}
-  | Horse jump boost. Ranged from 0 -> 100.
+  |
   |}
-Action ID can be one of the following values:
+==== Respawn ====
 {| class="wikitable"
-  ! ID
+  ! Packet ID
-  ! Action
+  ! State
+ ! Bound To
+ ! Field Name
+ ! Field Type
+ ! Notes
+ |-
+ | rowspan="12"| 0x47
+ | rowspan="12"| Play
+ | rowspan="12"| Client
+ | Dimension Type
+ | {{change|Identifier|VarInt}}
+ | 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.
   |-
-  | 0
+  | Is Flat
-  | Crouch
+ | {{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.
   |-
-  | 1
+  | Has death location
-  | Uncrouch
+  | {{Type|Boolean}}
+ | If true, then the next two fields are present.
   |-
-  | 2
+  | Death dimension Name
-  | Leave bed
+  | {{Type|Optional}} {{Type|Identifier}}
+ | Name of the dimension the player died in.
   |-
-  | 3
+  | Death location
-  | Start sprinting
+  | {{Type|Optional}} {{Type|Position}}
+ | The location that the player died at.
   |-
-  | 4
+  | Portal cooldown
-  | Stop sprinting
+  | {{Type|VarInt}}
+ | The number of ticks until the player can use the portal again.
   |-
-  | 5
+  | Data kept
-  | Jump with horse
+  | {{Type|Byte}}
-  |- style="background-color: #f4cccc; text-decoration: line-through;"
+  | Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
- | 6
+In the Notchian implementation, this is context dependent:
- | Open inventory
+* normal respawns (after death) keep no data;
+* exiting the end poem/credits keeps the attributes;
+* other dimension changes (portals or teleports) keep all data.
   |}
-==== Steer Vehicle ====
+==== Store Cookie (play) ====
-{| class="wikitable"
+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
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="3"| {{Change|0x0C|0x0D}}
+  | rowspan="3"| 0x6B
-  |rowspan="3"| Play
+  | rowspan="3"| Play
-  |rowspan="3"| Server
+  | rowspan="3"| Client
-  | Sideways
+  | colspan="2"| Key
-  | Float
+  | colspan="2"| Identifier
-  | Positive to the left of the player
+  | The identifier of the cookie.
   |-
-  | Forward
+  | colspan="2"| Payload Length
-  | Float
+  | colspan="2"| VarInt
-  | Positive forward
+  | Length of the following byte array.
   |-
-  | Flags
+  | colspan="2"| Payload
-  | Unsigned Byte
+  | colspan="2"| Byte Array (5120)
-  | Bit mask. 0x1: jump, 0x2: unmount
+  | The data of the cookie.
   |}
-==== Close Window ====
+==== Transfer (play) ====
-This packet is sent by the client when closing a window.
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-Note, Notchian clients send a close window message with Window ID 0 to close their inventory even though there is never an Open Window message for the inventory.
+{| class="wikitable" {{added}}
-{| class="wikitable"
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  | {{Change|0x0D|0x0E}}
+  | rowspan="2"| 0x73
-  |rowspan="1"| Play
+  | rowspan="2"| Play
-  |rowspan="1"| Server
+  | rowspan="2"| Client
-  | Window ID
+  | colspan="2"| Host
-  | Unsigned Byte
+  | colspan="2"| String
-  | This is the ID of the window that was closed. 0 for inventory.
+  | The hostname of IP of the server.
+ |-
+ | colspan="2"| Port
+ | colspan="2"| VarInt
+ | The port of the server.
   |}
-==== Click Window ====
+==== Update Attributes ====
-This packet is sent by the player when it clicks on a slot in a window.
+Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 {| class="wikitable"
@@ Line 792: / Line 999: @@
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="6"| {{Change|0x0E|0x0F}}
+  | rowspan="6"| 0x71
-  |rowspan="6"| Play
+  | rowspan="6"| Play
-  |rowspan="6"| Server
+  | rowspan="6"| Client
-  | Window ID
+  | colspan="2"| Entity ID
-  | Unsigned Byte
+  | colspan="2"| VarInt
-  | The ID of the window which was clicked. 0 for player inventory.
+  |
   |-
-  | Slot
+  | colspan="2"| Number Of Properties
-  | Short
+  | colspan="2"| VarInt
-  | The clicked slot number, see below
+  | Number of elements in the following array.
   |-
-  | Button
+  | rowspan="4"| Property
-  | Byte
+ | {{change|Key|Id}}
-  | The button used in the click, see below
+ | rowspan="4"| Array
+  | {{change|Identifier|VarInt Enum}}
+  | See below.
   |-
-  | Action Number
+  | Value
-  | Short
+  | Double
-  | A unique number for the action, implemented by Notchian as a counter, starting at 1. Used by the server to send back a [[Protocol#Confirm Transaction|Confirm Transaction]].
+  | See below.
   |-
-  | Mode
+  | Number Of Modifiers
-  | Byte
+  | VarInt
-  | Inventory operation mode, see below
+  | Number of elements in the following array.
   |-
-  | Clicked item
+  | Modifiers
-  | [[Slot Data|Slot]]
+  | Array of Modifier Data
-  | The clicked slot. Has to be empty (item ID = -1) for drop mode.
+  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
   |}
-See [[Inventory#Windows]] for further information about how slots are indexed.
+Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
-When right-clicking on a stack of items, half the stack will be picked up and half left in the slot. If the stack is an odd number, the half left in the slot will be smaller of the amounts.
+These changed between 24w03b and 24w13a, TODO: Update this
-The distinct type of click performed by the client is determined by the combination of the Mode and Button fields.
 {| class="wikitable"
- ! Mode
- ! Button
- ! Slot
- ! Trigger
   |-
-  !rowspan="2"| 0
+  ! Id
-  | 0
+  ! Key
-  | Normal
+  ! Default
-  | Left mouse click
+  ! Min
+ ! Max
+ ! Label
   |-
- | 1
- | Normal
- | Right mouse click
- |-
- !rowspan="2"| 1
   | 0
-  | Normal
+  | generic.armor
-  | Shift + left mouse click
+  | 0.0
+ | 0.0
+ | 30.0
+ | Armor.
   |-
   | 1
-  | Normal
+  | generic.armor_toughness
-  | Shift + right mouse click ''(identical behavior)''
+  | 0.0
+ | 0.0
+ | 20.0
+ | Armor Toughness.
   |-
-  !rowspan="5"| 2
+  | 2
-  | 0
+ | generic.attack_damage
-  | Normal
+ | 2.0
-  | Number key 1
+  | 0.0
+  | 2048.0
+  | Attack Damage.
   |-
-  | 1
+  | 3
-  | Normal
+  | generic.attack_knockback
-  | Number key 2
+  | 0.0
+ | 0.0
+ | 5.0
+ | Attack Knockback.
   |-
-  | 2
+  | 4
-  | Normal
+  | generic.attack_speed
-  | Number key 3
+ | 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
+ | 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
-  | Normal
+  | generic.follow_range
-  | Number key 9
+  | 32.0
+ | 0.0
+ | 2048.0
+ | Follow Range.
   |-
-  !rowspan="1"| 3
+  | 9
-  | 2
+  | horse.jump_strength
-  | Normal
+ | 0.7
-  | Middle click
+ | 0.0
+  | 2.0
+  | Jump Strength.
   |-
-  !rowspan="4"| 4
+  | 10
-  | 0
+ | generic.knockback_resistance
-  | Normal*
+ | 0.0
-  | Drop key (Q) (* Clicked item is different, see above)
+  | 0.0
+  | 1.0
+  | Knockback Resistance.
   |-
-  | 1
+  | 11
-  | Normal*
+  | generic.luck
-  | Ctrl + Drop key (Ctrl-Q) ''(drops full stack)''
+ | 0.0
+  | -1024.0
+ | 1024.0
+ | Luck.
   |-
-  | 0
+ | 12
-  | -999
+ | generic.max_absorption
-  | Left click outside inventory holding nothing ''(no-op)''
+  | 0.0
+  | 0.0
+ | 2048.0
+  | Max Absorption.
   |-
-  | 1
+ | 13
-  | -999
+ | generic.max_health
-  | Right click outside inventory holding nothing ''(no-op)''
+ | 20.0
+  | 1.0
+  | 1024.0
+  | Max Health.
   |-
-  !rowspan="6"| 5
+  | 14
-  | 0
+ | generic.movement_speed
-  | -999
+  | 0.7
-  | Starting left mouse drag ''(or middle mouse)''
+ | 0.0
+ | 1024.0
+ | Movement Speed.
+  |- {{added}}
+ | 15
+ | generic.scale
+ | 1.0
+ | 0.0625
+ | 16.0
+  | Scale.
   |-
-  | 4
+  | 16
-  | -999
+  | zombie.spawn_reinforcements
-  | Starting right mouse drag
+  | 0.0
-  |-
+  | 0.0
-  | 1
+  | 1.0
-  | Normal
+  | Spawn Reinforcements Chance.
-  | Add slot for left-mouse drag
+  |- {{added}}
-  |-
+  | 17
-  | 5
+  | generic.step_height
- | Normal
+  | 0.6
- | Add slot for right-mouse drag
+  | 0.0
- |-
+  | 10.0
- | 2
+  | Step Height.
- | -999
- | Ending left mouse drag
- |-
-  | 6
-  | -999
- | Ending right mouse drag
- |-
- ! 6
-  | 0
-  | Normal
- | Double click
   |}
-Starting from version 1.5, “painting mode” is available for use in inventory windows. It is done by picking up stack of something (more than 1 item), then holding mouse button (left, right or middle) and dragging held stack over empty (or same type in case of right button) slots. In that case client sends the following to server after mouse button release (omitting first pickup packet which is sent as usual):
+''Modifier Data'' structure:
-# packet with mode 5, slot -999, button (0 for left | 4 for right);
-# packet for every slot painted on, mode is still 5, button (1 | 5);
-# packet with mode 5, slot -999, button (2 | 6);
-If any of the painting packets other than the “progress” ones are sent out of order (for example, a start, some slots, then another start; or a left-click in the middle) the painting status will be reset.
-The server will send back a [[#Confirm Transaction|Confirm Transaction]]<!-- note that the anchor should be changed to #Confirm Transaction 2 when merging with [[Protocol]] --> packet. If the click was not accepted, the client must reflect that packet before sending more [[#Click Window|Click Window]] packets, otherwise the server will reject them silently. The Notchian server also sends a [[Protocol#Window Items|Window Items]] packet for the open window and [[Protocol#Set Slot|Set Slot]] packets for the clicked and cursor slot, but only when the click was not accepted, probably to resynchronize client and server.
-==== Confirm Transaction ====
- <SpaceManiac> noooo idea why the serverbound confirm transaction packet exists
- <SpaceManiac> I think it's sent as a response to the clientbound confirm transaction in some situations, but it's fuzzy
 {| class="wikitable"
-  ! Packet ID
+  |-
- ! State
- ! Bound To
   ! Field Name
   ! Field Type
   ! Notes
   |-
-  |rowspan="3"| {{Change|0x0F|0x10}}
+  | UUID
- |rowspan="3"| Play
+  | UUID
- |rowspan="3"| Server
+  |
- | Window ID
-  | Byte
-  | The ID of the window that the action occurred in
   |-
-  | Action Number
+  | Amount
-  | Short
+  | Double
-  | Every action that is to be accepted has a unique number. This field corresponds to that number.
+  | May be positive or negative.
   |-
-  | Accepted
+  | Operation
-  | Boolean
+  | Byte
-  | Whether the action was accepted
+  | See below.
   |}
-==== Creative Inventory Action ====
+The operation controls how the base value of the modifier is changed.
-While the user is in the standard inventory (i.e., not a crafting bench) in Creative mode, the player will send this packet.
+* 0: Add/subtract amount
+* 1: Add/subtract amount percent of the current value
+* 2: Multiply by amount percent
-Clicking in the creative inventory menu is quite different from non-creative inventory management. Picking up an item with the mouse actually deletes the item from the server, and placing an item into a slot or dropping it out of the inventory actually tells the server to create the item from scratch. (This can be verified by clicking an item that you don't mind deleting, then severing the connection to the server; the item will be nowhere to be found when you log back in.) As a result of this implementation strategy, the "Destroy Item" slot is just a client-side implementation detail that means "I don't intend to recreate this item.". Additionally, the long listings of items (by category, etc.) are a client-side interface for choosing which item to create. Picking up an item from such listings sends no packets to the server; only when you put it somewhere does it tell the server to create the item in that location.
+All of the 0's are applied first, and then the 1's, and then the 2's.
-This action can be described as “set inventory slot”. Picking up an item sets the slot to item ID -1. Placing an item into an inventory slot sets the slot to the specified item. Dropping an item (by clicking outside the window) effectively sets slot -1 to the specified item, which causes the server to spawn the item entity, etc.. All other inventory slots are numbered the same as the non-creative inventory (including slots for the 2×2 crafting menu, even though they aren't visible in the vanilla client).
+==== Entity Effect ====
 {| class="wikitable"
@@ Line 983: / Line 1,212: @@
   ! Notes
   |-
-  |rowspan="2"| {{Change|0x10|0x11}}
+  | rowspan="7"| 0x72
-  |rowspan="2"| Play
+  | rowspan="7"| Play
-  |rowspan="2"| Server
+  | rowspan="7"| Client
-  | Slot
+  | Entity ID
-  | Short
+  | VarInt
-  | Inventory slot
+  |
   |-
-  | Clicked Item
+  | Effect ID
-  | [[Slot Data|Slot]]
+  | VarInt
-  |
+  | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
- |}
-==== Enchant Item ====
-{| class="wikitable"
- ! Packet ID
- ! State
- ! Bound To
- ! Field Name
- ! Field Type
- ! Notes
   |-
-  |rowspan="2"| {{Change|0x11|0x12}}
+  | Amplifier
- |rowspan="2"| Play
- |rowspan="2"| Server
- | Window ID
   | Byte
-  | The ID of the enchantment table window sent by [[Protocol#Open Window|Open Window]]
+  | Notchian client displays effect level as Amplifier + 1.
+ |-
+ | Duration
+ | VarInt
+ | Duration in ticks. (-1 for infinite)
   |-
-  | Enchantment
+  | Flags
   | Byte
-  | The position of the enchantment on the enchantment table window, starting with 0 as the topmost one
+  | Bit field, see below.
+ |- {{removed}}
+ | Has Factor Data
+ | Boolean
+ | Used in DARKNESS effect
+ |- {{removed}}
+ | Factor Codec
+ | NBT Tag
+ | See below
   |}
-==== Update Sign ====
+{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
-This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
+Within flags:
-{| class="wikitable"
+* 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.
-  ! Packet ID
+* 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.
-  ! State
+* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
-  ! Bound To
+* {{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.}}
-  ! Field Name
-  ! Field Type
+{{change|Factor Data|}}
-  ! Notes
+{| class="wikitable" {{removed}}
+  !Name
+  !Type
+  !style="width: 250px;" colspan="2"| Notes
   |-
-  |rowspan="5"| {{Change|0x12|0x13}}
+  | padding_duration
- |rowspan="5"| Play
+  | TAG_INT
- |rowspan="5"| Server
+  |
- | Location
-  | Position
-  | Block Coordinates
   |-
-  | Line 1
+  | factor_start
-  | {{Change|[[Chat]]|String}}
+  | TAG_FLOAT
-  | First line of text in the sign
+  |
   |-
-  | Line 2
+  | factor_target
-  | {{Change|[[Chat]]|String}}
+  | TAG_FLOAT
-  | Second line of text in the sign
+  |
   |-
-  | Line 3
+  | factor_current
-  | {{Change|[[Chat]]|String}}
+  | TAG_FLOAT
-  | Third line of text in the sign
+  |
   |-
-  | Line 4
+  | effect_changed_timestamp
-  | {{Change|[[Chat]]|String}}
+  | TAG_INT
- | Fourth line of text in the sign
- |}
-==== Player Abilities ====
-The latter 2 bytes are used to indicate the walking and flying speeds respectively, while the first byte is used to determine the value of 4 booleans.
-The vanilla client sends this packet when the player starts/stops flying with the second parameter changed accordingly. All other parameters are ignored by the vanilla server.
-{| class="wikitable"
- ! Packet ID
- ! State
- ! Bound To
- ! Field Name
- ! Field Type
- ! Notes
   |-
-  |rowspan="3"| {{Change|0x13|0x14}}
+  | factor_previous_frame
- |rowspan="3"| Play
+  | TAG_FLOAT
- |rowspan="3"| Server
- | Flags
- | Byte
- | Bit mask. 0x08: damage disabled (god mode), 0x04: can fly, 0x02: is flying, 0x01: is Creative
- |-
- | Flying Speed
- | Float
-  |
   |-
-  | Walking Speed
+  | had_effect_last_tick
- | Float
+  | TAG_BOOLEAN
-  |
   |}
-==== Tab-Complete ====
+=== Serverbound ===
-Sent when the user presses ''tab'' while writing text.
+==== Chat Command ====
 {| class="wikitable"
@@ Line 1,091: / Line 1,293: @@
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="3"| {{Change|0x14|0x15}}
+  | rowspan="8"| 0x04
-  |rowspan="3"| Play
+ | rowspan="8"| Play
-  |rowspan="3"| Server
+ | rowspan="8"| Server
-  | Text
+ | colspan="2"| Command
-  | String
+ | colspan="2"| {{Type|String}} (256)
-  | All text behind the cursor
+ | colspan="2"| The command typed by the client.
-  |-
+ |- {{removed}}
-  | Has Position
+  | colspan="2"| Timestamp
-  | Boolean
+ | colspan="2"| {{Type|Long}}
-  |
+  | colspan="2"| The timestamp that the command was executed.
-  |-
+ |- {{removed}}
-  | Looked At Block
+  | colspan="2"| Salt
-  | Optional Position
+  | colspan="2"| {{Type|Long}}
-  | The position of the block being looked at. Only sent if Has Position is true
+  | 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"|
   |}
-==== Client Settings ====
-Sent when the player connects, or when settings are changed.
+==== Signed Chat Command ====
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  |rowspan="6"| {{Change|0x15|0x16}}
+  | rowspan="8"| 0x05
-  |rowspan="6"| Play
+  | rowspan="8"| Play
-  |rowspan="6"| Server
+  | rowspan="8"| Server
-  | Locale
+  | colspan="2"| Command
-  | String
+  | colspan="2"| String(256)
-  | e.g. en_GB
+  | The command typed by the client.
   |-
-  | View Distance
+  | colspan="2"| Timestamp
-  | Byte
+  | colspan="2"| Long
-  | Client-side render distance, in chunks
+  | The timestamp that the command was executed. Milliseconds since the Unix epoch.
   |-
-  | Chat Mode
+  | colspan="2"| Salt
-  | {{Change|Byte|VarInt}}
+  | colspan="2"| Long
-  | 0: enabled, 1: commands only, 2: hidden
+  | The salt for the following argument signatures.
   |-
-  | Chat Colors
+  | colspan="2"| Argument Signature Count
-  | Boolean
+  | colspan="2"| VarInt
-  | “Colors” multiplayer setting
+  | Number of elements in the following array. The maximum length in Notchian server is 8.
   |-
-  | Displayed Skin Parts
+  | rowspan="2"| Argument Signatures
- | Unsigned Byte
+  | Name
-  | Skin parts, see note below
+  | rowspan="2"| Array
-  |- style="background-color: #d9ead3;"
+  | String(16)
- | Main Hand
+  | The name of the argument that is signed by the following signature.
-  | VarInt
- | 0: Left, 1: Right
-  |}
-''Displayed Skin Parts'' flags:
-* Bit 0 (0x01): Cape enabled
-* Bit 1 (0x02): Jacket enabled
-* Bit 2 (0x04): Left Sleeve enabled
-* Bit 3 (0x08): Right Sleeve enabled
-* Bit 4 (0x10): Left Pants Leg enabled
-* Bit 5 (0x20): Right Pants Leg enabled
-* Bit 6 (0x40): Hat enabled
-The most significant bit (bit 7, 0x80) appears to be unused.
-==== Client Status ====
-Sent when the client is ready to complete login and when the client is ready to respawn after death.
-{| class="wikitable"
- ! Packet ID
- ! State
- ! Bound To
- ! Field Name
- ! Field Type
- ! Notes
   |-
-  |rowspan="1"| {{Change|0x16|0x17}}
+  | Signature
- |rowspan="1"| Play
+  | ByteArray(256)
- |rowspan="1"| Server
+  | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
- | Action ID
-  | VarInt
-  | See below
- |}
-''Action ID'' values:
-{| class="wikitable"
   |-
-  ! Action ID
+  | colspan="2"| Seen Messages Offset
-  ! Action
+  | colspan="2"| VarInt
+ |
   |-
-  | 0
+  | colspan="2"| Seen Messages Acknowledged
- | Perform respawn
+  | colspan="2"| Fixed BitSet(20)
-  |-
+  |
- | 1
- | Request stats
-  |-
- | 2
- | {{Change|''Taking Inventory'' achievement|Open Inventory}}
   |}
-==== Plugin Message ====
+==== Cookie Response (play) ====
-Mods and plugins can use this to send their data. Minecraft itself uses a number of [[plugin channel]]s. These internal channels are prefixed with <code>MC|</code>.
-More documentation on this: [http://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/ http://dinnerbone.com/blog/2012/01/13/minecraft-plugin-channels-messaging/]
-Note that the data length is known from the packet length, so there is no need for a length member being sent.
+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="2"| {{Change|0x17|0x18}}
+  | rowspan="4"| 0x11
-  |rowspan="2"| Play
+ | rowspan="4"| Play
-  |rowspan="2"| Server
+  | rowspan="4"| Server
-  | Channel
+ | colspan="2"| Key
-  | String
+  | colspan="2"| Identifier
-  | Name of the [[plugin channel]] used to send the data
+ | The identifier of the cookie.
+  |-
+  | colspan="2"| Has Payload
+  | colspan="2"| Boolean
+ | The payload is only present if the cookie exists on the client.
   |-
-  | Data
+  | colspan="2"| Payload Length
- | Byte Array
+  | colspan="2"| Optional VarInt
- | Any data, depending on the channel. <code><nowiki>MC|</nowiki></code> channels are documented [[plugin channel|here]].
+  | Length of the following byte array.
-  |}
-==== Spectate ====
-{| class="wikitable"
-  ! Packet ID
- ! State
- ! Bound To
- ! Field Name
- ! Field Type
- ! Notes
   |-
-  |rowspan="1"| {{Change|0x18|0x19}}
+  | colspan="2"| Payload
-  |rowspan="1"| Play
+  | colspan="2"| Optional Byte Array (5120)
- |rowspan="1"| Server
+  | The data of the cookie, if any.
- | Target Player
- | UUID
-  |
   |}
-==== Resource Pack Status ====
+==== Debug Sample Subscription ====
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 1,256: / Line 1,426: @@
   ! Notes
   |-
-  |rowspan="2"| {{Change|0x19|0x1A}}
+  | 0x13
-  |rowspan="2"| Play
+  | Play
-  |rowspan="2"| Server
+  | Server
-  | Hash
+  | Sample Type
-  | String
+  | VarInt Enum
-  | The hash sent in the [[Protocol#Resource Pack Send|Resource Pack Send]] packet.
+  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
- |-
- | Result
- | VarInt
- | 0: successfully loaded, 1: declined, 2: failed download, 3: accepted
   |}
-== 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