Difference between revisions of "Pre-release protocol"

Latest revision as of 19:57, 25 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

Informs the client of which data packs are present on the server. The client is expected to respond with its own Serverbown Known Packs packet. The Notchian server does not continue with Configuration until it receives a response.

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|1.19.4, protocol 762]]) to the current pre-release (currently [[Protocol version numbers|1.20-pre5, protocol {{Snapshot PVN|1073741962}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
+This page documents the changes from the [[Protocol|last stable Minecraft release]] (currently [[Protocol version numbers|1.20.4, protocol 765]]) to the current pre-release (currently [[Protocol version numbers|24w13a, protocol {{Snapshot PVN|1073742006}}]]). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
 One who wishes to commandeer the merging of this into [[Protocol]] when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
@@ Line 18: / Line 18: @@
   !colspan="2"| Documentation
   |-
-!colspan="4"| Play clientbound
+ !colspan="4"| Handshake serverbound
-{{PacketList|0x24|Chunk Data and Update Light}}
+ {{PacketList|0x00|Handshake}}
-{{PacketList|0x27|Update Light}}
+ |-
-{{PacketList|0x28|Login (play)}}
+ !colspan="4"| Login clientbound
-{{PacketList|0x31|Open Sign Editor}}
+ {{PacketList|0x01|Encryption Request}}
-{{PacketList|0x36|End Combat}}
+ {{PacketList|0x05|Cookie Request (login)|rel=added}}
-{{PacketList|0x38|Combat Death}}
+ |-
-{{PacketList|0x41|Respawn}}
+ !colspan="4"| Login serverbound
-{{PacketList|0x43|Update Section Blocks}}
+ {{PacketList|0x04|Cookie Response (login)|rel=added}}
-{{PacketList|0x69|Update Advancements}}
+ |-
-{{PacketList|0x6B|Feature Flags}}
+ !colspan="4"| Configuration clientbound
-{{PacketList|0x6D|Update Recipes}}
+ {{PacketList|0x00|Cookie Request (configuration)|rel=added}}
-|-
+ {{PacketList|{{change|0x00|0x01}}|Clientbound Plugin Message (configuration)|pre=unchanged}}
-!colspan="4"| Play serverbound
+ {{PacketList|{{change|0x01|0x02}}|Disconnect (configuration)|pre=unchanged}}
-{{PacketList|0x2E|Update Sign}}
+ {{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 ==
@@ Line 41: / Line 218: @@
 == Entity Metadata ==
-No changes so far.
+{{#vardefine: meta_prerelease | 1}}
-=== Entity ===
+{{Metadata type definition/begin}}
+ ! Value
+ ! Notes
+{{Metadata type definition|Byte}}
+ | {{Type|Byte}}
+ |
+{{Metadata type definition|VarInt}}
+ | {{Type|VarInt}}
+ |
+{{Metadata type definition|VarLong}}
+ | {{Type|VarLong}}
+ |
+{{Metadata type definition|Float}}
+ | {{Type|Float}}
+ |
+{{Metadata type definition|String}}
+ | {{Type|String}}
+ |
+{{Metadata type definition|Text Component}}
+ | {{Type|Text Component}}
+ |
+{{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
+ |}
-No changes so far.
+=== Living Entity ===
-== Block Actions ==
+TODO: This has changed to use the PARTICLES attribute
-No changes so far.
+=== Wolf ===
-== Inventories ==
+{{Metadata inherit|Wolf|inherits=Tameable Animal}}
 {| class="wikitable"
-  |-
+  ! Index
   ! Type
-  ! Name
+  !style="width: 250px;" colspan="2"| Meaning
-  ! Description
+  ! Default
+ |- {{added}}
+ | {{Metadata id|}}
+ | {{Metadata type|Wolf Variant}}
+ |colspan="2"| Wolf Variant
+ | PALE
   |-
-  | 0
+  | {{Metadata id|}}
-  | minecraft:generic_9x1
+ | {{Metadata type|Boolean}}
-  | A 1-row inventory, not used by the notchian server.
+  |colspan="2"| Is begging
+  | false
   |-
-  | 1
+  | {{Metadata id|}}
-  | minecraft:generic_9x2
+  | {{Metadata type|VarInt}}
-  | A 2-row inventory, not used by the notchian server.
+  |colspan="2"| Collar color (values are those {{Minecraft Wiki|Data_values#Dyes|used with dyes}})
+ | 14 (Red)
   |-
-  | 2
+  | {{Metadata id|}}
- | minecraft:generic_9x3
+  | {{Metadata type|VarInt}}
- | General-purpose 3-row inventory.  Used by {{Minecraft Wiki|Chest}}, {{Minecraft Wiki|minecart with chest}}, {{Minecraft Wiki|ender chest}}, and {{Minecraft Wiki|barrel}}
+  |colspan="2"| Anger time
-  |-
+  | 0
- | 3
+  |}
- | minecraft:generic_9x4
- | A 4-row inventory, not used by the notchian server.
+=== Armadillo ===
- |-
- | 4
+{{Metadata inherit|Armadillo|inherits=Animal|start_at=17}}
- | minecraft:generic_9x5
+{| class="wikitable" {{added}}
- | A 5-row inventory, not used by the notchian server.
+  ! Index
- |-
+  ! Type
- | 5
+  !style="width: 250px;" colspan="2"| Meaning
- | minecraft:generic_9x6
+  ! Default
- | General-purpose 6-row inventory, used by large chests.
- |-
- | 6
- | minecraft:generic_3x3
- | General-purpose 3-by-3 square inventory, used by {{Minecraft Wiki|Dispenser}} and {{Minecraft Wiki|Dropper}}
-  |-
- | 7
- | minecraft:anvil
- | {{Minecraft Wiki|Anvil}}
- |-
- | 8
- | minecraft:beacon
- | {{Minecraft Wiki|Beacon}}
- |-
- | 9
- | minecraft:blast_furnace
- | {{Minecraft Wiki|Blast Furnace}}
- |-
- | 10
- | minecraft:brewing_stand
- | {{Minecraft Wiki|Brewing stand}}
- |-
- | 11
- | minecraft:crafting
- | {{Minecraft Wiki|Crafting table}}
- |-
- | 12
- | minecraft:enchantment
- | {{Minecraft Wiki|Enchantment table}}
- |-
- | 13
- | minecraft:furnace
- | {{Minecraft Wiki|Furnace}}
- |-
-  | 14
-  | minecraft:grindstone
- | {{Minecraft Wiki|Grindstone}}
- |-
- | 15
- | minecraft:hopper
- | {{Minecraft Wiki|Hopper}} or {{Minecraft Wiki|minecart with hopper}}
- |-
- | 16
- | minecraft:lectern
- | {{Minecraft Wiki|Lectern}}
- |-
- | 17
- | minecraft:loom
- | {{Minecraft Wiki|Loom}}
- |-
- | 18
- | minecraft:merchant
- | {{Minecraft Wiki|Villager}}, {{Minecraft Wiki|Wandering Trader}}
-  |-
-  | 19
-  | minecraft:shulker_box
- | {{Minecraft Wiki|Shulker box}}
-  |- {{removed}}
- | 20
- | minecraft:legacy_smithing
- | {{Minecraft Wiki|Smithing Table}}
-{{Warning|The Notchian server only sends this type if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was '''not''' enabled}}
- |-
- | {{change|21|20}}
- | minecraft:smithing
- | {{Minecraft Wiki|Smithing Table}}
-{{change|{{Warning|The Notchian server only sends this type if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled}}|}}
- |-
- | {{change|22|21}}
- | minecraft:smoker
- | {{Minecraft Wiki|Smoker}}
- |-
- | {{change|23|22}}
- | minecraft:cartography
- | {{Minecraft Wiki|Cartography Table}}
   |-
-  | {{change|24|23}}
+  | {{Metadata id|added}}
- | minecraft:stonecutter
+  | {{Metadata type|Armadillo State}}
-  | {{Minecraft Wiki|Stonecutter}}
+ |colspan="2"| Armadillo State
+ | IDLE
   |}
+== Block Actions ==
+No changes so far.
+== Inventories ==
+No changes so far.
 == Plugin Channels ==
@@ Line 166: / Line 380: @@
 No changes so far.
-== Play ==
+== Handshake ==
-=== Clientbound ===
-==== Chunk Data and Update Light ====
+=== Serverbound ===
-{{Main|Chunk Format}}
-{{See also|#Unload Chunk}}
-{{Need Info|How do biomes work now?  The biome change happened at the same time as the seed change, but it's not clear how/if biomes could be computed given that it's not the actual seed...  ([https://www.reddit.com/r/Mojira/comments/e5at6i/a_discussion_for_the_changes_to_how_biomes_are/ /r/mojira discussion] which notes that it seems to be some kind of interpolation)}}
+==== Handshake ====
-This packet sends all block entities in the chunk (though sending them is not required; it is still legal to send them with [[#Block Entity Data|Block Entity Data]] later). The light data in this packet is the same format as in the [[#Update Light|Update Light]] packet.
+This causes the server to switch into the target state.
 {| class="wikitable"
@@ Line 182: / Line 392: @@
   ! State
   ! Bound To
-  ! colspan="2"| Field Name
+  ! Field Name
-  ! colspan="2"| Field Type
+  ! Field Type
   ! Notes
   |-
-  | rowspan="21"| 0x24
+  | rowspan="4"| 0x00
-  | rowspan="21"| Play
+  | rowspan="4"| Handshaking
-  | rowspan="21"| Client
+  | rowspan="4"| Server
- | colspan="2"| Chunk X
+  | Protocol Version
-  | colspan="2"| Int
+  | [[#Definitions:varint|VarInt]]
-  | Chunk coordinate (block coordinate divided by 16, rounded down)
+  | See [[protocol version numbers]] (currently 765 in Minecraft 1.20.4).
- |-
- | colspan="2"| Chunk Z
- | colspan="2"| Int
- | Chunk coordinate (block coordinate divided by 16, rounded down)
- |-
- | colspan="2"| Heightmaps
- | colspan="2"| [[NBT]]
- | Compound containing one long array named <code>MOTION_BLOCKING</code>, which is a heightmap for the highest solid block at each position in the chunk (as a compacted long array with 256 entries, with the number of bits per entry varying depending on the world's height, defined by the formula <code>ceil(log2(height + 1))</code>). The Notchian server also adds a <code>WORLD_SURFACE</code> long array, the purpose of which is unknown, but it's not required for the chunk to be accepted.
- |-
- | colspan="2"| Size
- | colspan="2"| VarInt
- | Size of Data in bytes
- |-
- | colspan="2"| Data
- | colspan="2"| Byte array
- | See [[Chunk Format#Data structure|data structure]] in Chunk Format
- |-
- | colspan="2"| Number of block entities
- | colspan="2"| VarInt
- | Number of elements in the following array
- |-
- | rowspan="4"| Block Entity
- | Packed XZ
- | rowspan="4"| Array
- | Byte
- | The packed section coordinates, calculated from <code><nowiki>((blockX & 15) << 4) | (blockZ & 15)</nowiki></code>
- |-
- | Y
- | Short
- | The height relative to the world
- |-
- | Type
- | VarInt
- | The type of block entity
- |-
- | Data
-  | [[NBT]]
- | The block entity's data, without the X, Y, and Z values
- |- {{removed}}
- | colspan="2"| Trust Edges
- | colspan="2"| Boolean
- | If edges should be trusted for light updates.
- |-
- | colspan="2"| Sky Light Mask
- | colspan="2"| BitSet
- | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Sky Light array below.  The least significant bit is for blocks 16 blocks to 1 block below the min world height (one section below the world), while the most significant bit covers blocks 1 to 16 blocks above the max world height (one section above the world).
- |-
- | colspan="2"| Block Light Mask
- | colspan="2"| BitSet
- | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Block Light array below.  The order of bits is the same as in Sky Light Mask.
- |-
- | colspan="2"| Empty Sky Light Mask
- | colspan="2"| BitSet
- | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Sky Light data.  The order of bits is the same as in Sky Light Mask.
- |-
- | colspan="2"| Empty Block Light Mask
- | colspan="2"| BitSet
- | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Block Light data.  The order of bits is the same as in Sky Light Mask.
- |-
- | colspan="2"| Sky Light array count
- | colspan="2"| VarInt
- | Number of entries in the following array; should match the number of bits set in Sky Light Mask
- |-
- | rowspan="2"| Sky Light arrays
- | Length
- | rowspan="2"| Array
- | VarInt
- | Length of the following array in bytes (always 2048)
- |-
- | Sky Light array
- | Array of 2048 bytes
- | There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value. Indexed <code><nowiki>((y<<8) | (z<<4) | x) / 2 </nowiki></code> If there's a remainder, masked 0xF0 else 0x0F.
   |-
-  | colspan="2"| Block Light array count
+  | Server Address
-  | colspan="2"| VarInt
+  | [[#Definitions:string|String]] (255)
-  | Number of entries in the following array; should match the number of bits set in Block Light Mask
+  | 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.
   |-
-  | rowspan="2"| Block Light arrays
+  | Server Port
- | Length
+  | [[#Definitions:unsigned-short|Unsigned Short]]
-  | rowspan="2"| Array
+  | Default is 25565. The Notchian server does not use this information.
- | VarInt
-  | Length of the following array in bytes (always 2048)
   |-
-  | Block Light array
+  | Next State
-  | Array of 2048 bytes
+  | [[#Definitions:varint|VarInt]] [[#Definitions:enum|Enum]]
-  | There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value. Indexed <code><nowiki>((y<<8) | (z<<4) | x) / 2 </nowiki></code> If there's a remainder, masked 0xF0 else 0x0F.
+  | 1 for [[#Status|Status]], 2 for [[#Login|Login]]{{change||, 3 for [[#Login|Transfer]]}}.
   |}
-Note that the Notchian client requires an [[#Set Center Chunk|Set Center Chunk]] packet when it crosses a chunk border, otherwise it'll only display render distance + 2 chunks around the chunk it spawned in.
+== Status ==
+=== Clientbound ===
+No changes so far.
-The compacted array format has been adjusted so that individual entries no longer span across multiple longs, affecting the main data array and heightmaps.
+=== Serverbound ===
-New format, 5 bits per block, containing the following references to blocks in a palette (not shown): <span style="border: solid 2px hsl(0, 90%, 60%)">1</span><span style="border: solid 2px hsl(30, 90%, 60%)">2</span><span style="border: solid 2px hsl(60, 90%, 60%)">2</span><span style="border: solid 2px hsl(90, 90%, 60%)">3</span><span style="border: solid 2px hsl(120, 90%, 60%)">4</span><span style="border: solid 2px hsl(150, 90%, 60%)">4</span><span style="border: solid 2px hsl(180, 90%, 60%)">5</span><span style="border: solid 2px hsl(210, 90%, 60%)">6</span><span style="border: solid 2px hsl(240, 90%, 60%)">6</span><span style="border: solid 2px hsl(270, 90%, 60%)">4</span><span style="border: solid 2px hsl(300, 90%, 60%)">8</span><span style="border: solid 2px hsl(330, 90%, 60%)">0</span><span style="border: solid 2px hsl(0, 90%, 30%)">7</span><span style="border: solid 2px hsl(30, 90%, 30%)">4</span><span style="border: solid 2px hsl(60, 90%, 30%)">3</span><span style="border: solid 2px hsl(90, 90%, 30%)">13</span><span style="border: solid 2px hsl(120, 90%, 30%)">15</span><span style="border: solid 2px hsl(150, 90%, 30%)">16</span><span style="border: solid 2px hsl(180, 90%, 30%)">9</span><span style="border: solid 2px hsl(210, 90%, 30%)">14</span><span style="border: solid 2px hsl(240, 90%, 30%)">10</span><span style="border: solid 2px hsl(270, 90%, 30%)">12</span><span style="border: solid 2px hsl(300, 90%, 30%)">0</span><span style="border: solid 2px hsl(330, 90%, 30%)">2</span>
+No changes so far.
-<code>0020863148418841</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 60%)">00000</span><span style="outline: solid 2px hsl(300, 90%, 60%)">01000</span><span style="outline: solid 2px hsl(270, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(240, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(210, 90%, 60%)">00110</span><span style="outline: solid 2px hsl(180, 90%, 60%)">00101</span><span style="outline: solid 2px hsl(150, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(120, 90%, 60%)">00100</span><span style="outline: solid 2px hsl(90, 90%, 60%)">00011</span><span style="outline: solid 2px hsl(60, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(30, 90%, 60%)">00010</span><span style="outline: solid 2px hsl(0, 90%, 60%)">00001</span></code><br>
+== Login ==
-<code>01018A7260F68C87</code> <code><span style="outline: dashed 2px black">0000</span><span style="outline: solid 2px hsl(330, 90%, 30%)">00010</span><span style="outline: solid 2px hsl(300, 90%, 30%)">00000</span><span style="outline: solid 2px hsl(270, 90%, 30%)">01100</span><span style="outline: solid 2px hsl(240, 90%, 30%)">01010</span><span style="outline: solid 2px hsl(210, 90%, 30%)">01110</span><span style="outline: solid 2px hsl(180, 90%, 30%)">01001</span><span style="outline: solid 2px hsl(150, 90%, 30%)">10000</span><span style="outline: solid 2px hsl(120, 90%, 30%)">01111</span><span style="outline: solid 2px hsl(90, 90%, 30%)">01101</span><span style="outline: solid 2px hsl(60, 90%, 30%)">00011</span><span style="outline: solid 2px hsl(30, 90%, 30%)">00100</span><span style="outline: solid 2px hsl(0, 90%, 30%)">00111</span></code>
-==== Update Light ====
+=== Clientbound ===
-Updates light levels for a chunk.  See {{Minecraft Wiki|Light}} for information on how lighting works in Minecraft.
+==== Encryption Request ====
 {| class="wikitable"
@@ Line 297: / Line 436: @@
   ! State
   ! Bound To
-  ! colspan="2"| Field Name
+  ! Field Name
-  ! colspan="2"| Field Type
+  ! Field Type
   ! Notes
   |-
-  | rowspan="13"| 0x27
+  | rowspan="6"| 0x01
-  | rowspan="13"| Play
+  | rowspan="6"| Login
-  | rowspan="13"| Client
+  | rowspan="6"| Client
-  | colspan="2"| Chunk X
+  | Server ID
-  | colspan="2"| VarInt
+  | {{Type|String}} (20)
-  | Chunk coordinate (block coordinate divided by 16, rounded down)
+  | Appears to be empty.
   |-
-  | colspan="2"| Chunk Z
+  | Public Key Length
-  | colspan="2"| VarInt
+  | {{Type|VarInt}}
- | Chunk coordinate (block coordinate divided by 16, rounded down)
+  | Length of Public Key.
- |- {{removed}}
-  | colspan="2"| Trust Edges
- | colspan="2"| Boolean
- | If edges should be trusted for light updates.
   |-
-  | colspan="2"| Sky Light Mask
+  | Public Key
-  | colspan="2"| BitSet
+  | {{Type|Byte Array}}
-  | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Sky Light array below.  The least significant bit is for blocks 16 blocks to 1 block below the min world height (one section below the world), while the most significant bit covers blocks 1 to 16 blocks above the max world height (one section above the world).
+  | The server's public key, in bytes.
   |-
-  | colspan="2"| Block Light Mask
+  | Verify Token Length
-  | colspan="2"| BitSet
+  | {{Type|VarInt}}
-  | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has data in the Block Light array below.  The order of bits is the same as in Sky Light Mask.
+  | Length of Verify Token. Always 4 for Notchian servers.
   |-
-  | colspan="2"| Empty Sky Light Mask
+  | Verify Token
-  | colspan="2"| BitSet
+  | {{Type|Byte Array}}
-  | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Sky Light data.  The order of bits is the same as in Sky Light Mask.
+  | A sequence of random bytes generated by the server.
-  |-
+  |- {{added}}
-  | colspan="2"| Empty Block Light Mask
+  | Should Authenticate
-  | colspan="2"| BitSet
+  | {{Type|Boolean}}
-  | BitSet containing bits for each section in the world + 2.  Each set bit indicates that the corresponding 16×16×16 chunk section has all zeros for its Block Light data.  The order of bits is the same as in Sky Light Mask.
+  |
-  |-
+  |}
- | colspan="2"| Sky Light array count
- | colspan="2"| VarInt
+==== Cookie Request (login) ====
- | Number of entries in the following array; should match the number of bits set in Sky Light Mask
- |-
+Requests a cookie that was previously stored.
- | rowspan="2"| Sky Light arrays
- | Length
+{| class="wikitable" {{added}}
- | rowspan="2"| Array
+  ! Packet ID
- | VarInt
+  ! State
- | Length of the following array in bytes (always 2048)
+  ! Bound To
- |-
+  ! colspan="2"| Field Name
- | Sky Light array
+  ! colspan="2"| Field Type
- | Array of 2048 bytes
+  ! Notes
- | There is 1 array for each bit set to true in the sky light mask, starting with the lowest value.  Half a byte per light value.
- |-
- | colspan="2"| Block Light array count
-  | colspan="2"| VarInt
-  | Number of entries in the following array; should match the number of bits set in Block Light Mask
-  |-
-  | rowspan="2"| Block Light arrays
-  | Length
- | rowspan="2"| Array
-  | VarInt
- | Length of the following array in bytes (always 2048)
   |-
-  | Block Light array
+  | rowspan="1"| 0x05
-  | Array of 2048 bytes
+  | rowspan="1"| Login
-  | There is 1 array for each bit set to true in the block light mask, starting with the lowest value.  Half a byte per light value.
+  | rowspan="1"| Client
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
   |}
-A bit will never be set in both the block light mask and the empty block light mask, though it may be present in neither of them (if the block light does not need to be updated for the corresponding chunk section).  The same applies to the sky light mask and the empty sky light mask.
+=== Serverbound ===
-==== Login (play) ====
+==== Cookie Response (login) ====
-See [[Protocol Encryption]] for information on logging in.
+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
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  | rowspan="21"| 0x28
+  | rowspan="4"| 0x04
-  | rowspan="21"| Play
+  | rowspan="4"| Login
-  | rowspan="21"| Client
+  | rowspan="4"| Server
-  | Entity ID
+  | colspan="2"| Key
-  | Int
+  | colspan="2"| Identifier
-  | The player's Entity ID (EID).
+  | The identifier of the cookie.
- |-
- | Is hardcore
- | Boolean
- |
   |-
-  | Gamemode
+  | colspan="2"| Has Payload
-  | Unsigned Byte
+  | colspan="2"| Boolean
-  | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
+  | The payload is only present if the cookie exists on the client.
   |-
-  | Previous Gamemode
+  | colspan="2"| Payload Length
- | Byte
+  | colspan="2"| VarInt
-  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous gamemode. Vanilla client uses this for the debug (F3 + N & F3 + F4) gamemode switch. (More information needed)
+  | Length of the following byte array.
- |-
- | Dimension Count
- | VarInt
-  | Size of the following array.
- |-
- | Dimension Names
- | Array of Identifier
- | Identifiers for all dimensions on the server.
- |-
- | Registry Codec
- | [[NBT|NBT Tag Compound]]
- | Represents certain registries that are sent from the server and are applied on the client.
- |-
- | Dimension Type
- | Identifier
- | Name of the dimension type being spawned into.
- |-
- | 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
- |-
- | 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 {{Minecraft Wiki|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.
- |-
- | Is Debug
- | Boolean
- | True if the world is a {{Minecraft Wiki|debug mode}} world; debug mode worlds cannot be modified and have predefined blocks.
- |-
- | Is Flat
- | 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
- | 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
+  | colspan="2"| Payload
- | Optional Position
+  | colspan="2"| Optional Byte Array (5120)
-  | The location that the player died at.
+  | The data of the cookie, if any.
- |- {{added}}
- | Portal cooldown
- | VarInt
-  | The number of ticks until the player can use the portal again<sup>What impact does this have on the client? Needs more info</sup>.
   |}
+== Configuration ==
-The '''Registry Codec''' NBT Tag Compound ([https://gist.github.com/rj00a/f2970a8ce4d09477ec8f16003b9dce86 Default value in JSON as of 1.19], [https://gist.github.com/nikes/aff59b758a807858da131a1881525b14 1.19.2]) includes three registries: "minecraft:dimension_type", "minecraft:worldgen/biome", and "minecraft:chat_type".
+=== Clientbound ===
-{| class="wikitable"
+==== Cookie Request (configuration) ====
- !Name
- !Type
- !style="width: 250px;" colspan="2"| Notes
- |-
- | minecraft:dimension_type
- | TAG_Compound
- | The dimension type registry (see below).
- |-
- | minecraft:worldgen/biome
- | TAG_Compound
- | The biome registry (see below).
- |-
- | minecraft:chat_type
- | TAG_Compound
- | The chat type registry (see below).
- |}
-Dimension type registry:
+Requests a cookie that was previously stored.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  !Name
+  ! Packet ID
-  !Type
+ ! State
-  !style="width: 250px;" colspan="2"| Notes
+  ! Bound To
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
   |-
-  | type
+  | rowspan="1"| 0x00
-  | TAG_String
+  | rowspan="1"| Configuration
-  | The name of the registry. Always "minecraft:dimension_type".
+  | rowspan="1"| Client
-  |-
+  | colspan="2"| Key
-  | value
+  | colspan="2"| Identifier
- | TAG_List
+  | The identifier of the cookie.
-  | List of dimension types registry entries (see below).
   |}
-Dimension type registry entry:
+==== Reset Chat ====
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  !Name
+  ! Packet ID
-  !Type
+  ! State
-  !style="width: 250px;" colspan="2"| Notes
+  ! Bound To
-  |-
+  ! Field Name
-  | name
+  ! Field Type
-  | TAG_String
+  ! Notes
- | The name of the dimension type (for example, "minecraft:overworld").
   |-
-  | id
+  | 0x06
-  | TAG_Int
+  | Configuration
-  | The protocol ID of the dimension (matches the index of the element in the registry list).
+  | Client
-  |-
+  | colspan="3"| ''no fields''
- | element
- | TAG_Compound
- | The dimension type (see below).
   |}
-Dimension type:
+==== Registry Data ====
+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"
-  ! Name
+  ! Packet ID
-  ! Type
+ ! State
-  !style="width: 250px;" colspan="2"| Meaning
+  ! Bound To
-  ! Values
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+  ! Notes
   |-
-  | piglin_safe
+  | rowspan="6"| 0x07
-  | TAG_Byte
+ | rowspan="6"| Configuration
-  | colspan="2"| Whether piglins shake and transform to zombified piglins.
+  | rowspan="6"| Client
-  | 1: true, 0: false.
+  |{{removed}} colspan="2"| Registry Codec
-  |-
+ |{{removed}} colspan="2"| {{Type|NBT}} (Compound)
-  | has_raids
+  |{{removed}}| See [[Registry Data]].
- | TAG_Byte
+  |- {{added}}
-  | colspan="2"| Whether players with the Bad Omen effect can cause a raid.
+  | colspan="2"| Registry ID
-  | 1: true, 0: false.
+  | colspan="2"| Identifier
-  |-
+  |
-  | monster_spawn_light_level
+  |- {{added}}
- | TAG_Int or TAG_Compound
+  | colspan="2"| Entry Count
- | Possibly the light level(s) at which monsters can spawn.
+  | colspan="2"| VarInt
-  | colspan="2"| When TAG_Int, 0 - 15. When TAG_Compound, contains the fields: type (TAG_String), appears to be always "minecraft:uniform", and value (TAG_Compound), which contains the fields: max_inclusive (TAG_Int), min_inclusive (TAG_Int).
+ | Number of entries in the following array.
-  |-
+  |- {{added}}
-  | monster_spawn_block_light_limit
+  | rowspan="3"| Entries
-  | TAG_Int
+  | Entry ID
-  | colspan="2"|
+  | rowspan="3"| Array
+ | Identifier
   |
-  |-
+  |- {{added}}
-  | natural
+  | Has Data
-  | TAG_Byte
+  | Boolean
-  | colspan="2"| When false, compasses spin randomly. When true, nether portals can spawn zombified piglins.
+  | Whether the entry has any data following.
- | 1: true, 0: false.
+  |- {{added}}
- |-
+  | Data
- | ambient_light
+  | NBT Tag
- | TAG_Float
+  | Entry data. Only present if Has Data is true.
- | colspan="2"| How much light the dimension has.
- | 0.0 to 1.0.
- |-
- | fixed_time
- | Optional TAG_Long
- | colspan="2"| If set, the time of the day is the specified value.
- | If set, 0 to 24000.
- |-
- | infiniburn
- | TAG_String
- | colspan="2"| A resource location defining what block tag to use for infiniburn.
- | "#" or minecraft resource "#minecraft:...".
- |-
- | respawn_anchor_works
- | TAG_Byte
- | colspan="2"| Whether players can charge and use respawn anchors.
- | 1: true, 0: false.
- |-
- | has_skylight
- | TAG_Byte
- | colspan="2"| Whether the dimension has skylight access or not.
- | 1: true, 0: false.
-  |-
-  | bed_works
- | TAG_Byte
-  | colspan="2"| Whether players can use a bed to sleep.
-  | 1: true, 0: false.
- |-
- | effects
- | TAG_String
- | colspan="2"| ?
- | "minecraft:overworld", "minecraft:the_nether", "minecraft:the_end" or something else.
- |-
- | min_y
- | TAG_Int
- | colspan="2"| The minimum Y level.
- | A multiple of 16. Example: -64
- |-
- | height
- | TAG_Int
- | colspan="2"| The maximum height.
- | A multiple of 16. Example: 256
- |-
- | logical_height
- | TAG_Int
- | colspan="2"| The maximum height to which chorus fruits and nether portals can bring players within this dimension.
- | 0-384.
- |-
- | coordinate_scale
- | TAG_Double
- | colspan="2"| The multiplier applied to coordinates when traveling to the dimension.
- | 0.00001 - 30000000.0
- |-
- | ultrawarm
- | TAG_Byte
- | colspan="2"| Whether the dimensions behaves like the nether (water evaporates and sponges dry) or not. Also causes lava to spread thinner.
- | 1: true, 0: false.
- |-
- | has_ceiling
- | TAG_Byte
- | colspan="2"| Whether the dimension has a bedrock ceiling or not. When true, causes lava to spread faster.
- | 1: true, 0: false.
   |}
-Biome registry:
+==== 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.
-  !Name
-  !Type
+{| class="wikitable" {{added}}
-  !style="width: 250px;" colspan="2"| Notes
+ ! Packet ID
+  ! State
+  ! Bound To
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
   |-
-  | type
+  | rowspan="2"| 0x0A
-  | TAG_String
+ | rowspan="2"| Configuration
-  | The name of the registry. Always "minecraft:worldgen/biome".
+ | rowspan="2"| Client
+  | colspan="2"| Key
+ | colspan="2"| Identifier
+  | The identifier of the cookie.
   |-
-  | value
+  | colspan="2"| Payload
-  | TAG_List
+  | colspan="2"| ByteArray(5120)
-  | List of biome registry entries (see below).
+  | The data of the cookie.
   |}
-Biome registry entry:
+==== Transfer (configuration) ====
-{| class="wikitable"
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-  !Name
-  !Type
+{| class="wikitable" {{added}}
-  !style="width: 250px;" colspan="2"| Notes
+ ! Packet ID
+  ! State
+  ! Bound To
+  ! colspan="2"| Field Name
+ ! colspan="2"| Field Type
+ ! Notes
   |-
-  | name
+  | rowspan="2"| 0x0B
-  | TAG_String
+ | rowspan="2"| Configuration
-  | The name of the biome (for example, "minecraft:ocean").
+  | rowspan="2"| Client
+ | colspan="2"| Host
+ | colspan="2"| String
+  | The hostname of IP of the server.
   |-
-  | id
+  | colspan="2"| Port
-  | TAG_Int
+  | colspan="2"| VarInt
-  | The protocol ID of the biome (matches the index of the element in the registry list).
+  | The port of the server.
- |-
- | element
- | TAG_Compound
- | The biome properties (see below).
   |}
-Biome properties:
+==== Clientbound Known Packs ====
+Informs the client of which data packs are present on the server.
+The client is expected to respond with its own [[#Serverbound_Known_Packs|Serverbown Known Packs]] packet.
+The Notchian server does not continue with Configuration until it receives a response.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  ! colspan="3"|Name
+  ! Packet ID
-  ! colspan="2"|Type
+ ! State
-  !style="width: 250px;" colspan="2"| Meaning
+ ! Bound To
-  ! colspan="2"|Values
+  ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+  ! Notes
   |-
-  | colspan="3"|precipitation
+  | rowspan="4"| 0x0E
-  | colspan="2"|TAG_String
+ | rowspan="4"| Configuration
-  | colspan="2"| The type of precipitation in the biome.
+  | rowspan="4"| Client
-  | colspan="2"|"rain", "snow", or "none".
+  | colspan="2"| Known Pack Count
+  | colspan="2"| VarInt
+ | The number of known packs in the following array.
   |-
-  | colspan="3"| depth
+  | rowspan="3"| Known Packs
-  | colspan="2"| Optional TAG_Float
+  | Namespace
-  | colspan="2"| The depth factor of the biome.
+  | rowspan="3"| Array
-  | colspan="2"| The default values vary between 1.5 and -1.8.
+  | String
+ |
   |-
-  | colspan="3"| temperature
+  | ID
-  | colspan="2"| TAG_Float
+  | String
-  | colspan="2"| The temperature factor of the biome.
+  |
- | colspan="2"| The default values vary between 2.0 and -0.5.
   |-
-  | colspan="3"| scale
+  | Version
- | colspan="2"| Optional TAG_Float
+  | String
- | colspan="2"| ?
+  |
- | colspan="2"| The default values vary between 1.225 and 0.0.
- |-
- | colspan="3"| downfall
- | colspan="2"| TAG_Float
- | colspan="2"| ?
- | colspan="2"| The default values vary between 1.0 and 0.0.
- |-
- | colspan="3"| category
- | colspan="2"| Optional TAG_String
- | colspan="2"| The category of the biome.
- | colspan="2"| Known values are "ocean", "plains", "desert", "forest", "extreme_hills", "taiga", "swamp", "river", "nether", "the_end", "icy", "mushroom", "beach", "jungle", "mesa", "savanna", and "none".
- |-
- | colspan="3"| temperature_modifier
- | colspan="2"| Optional TAG_String
- | colspan="2"| ?
- | colspan="2"| The only known value is "frozen".
- |-
- | rowspan="13"| effects
- | colspan="2"| sky_color
- | rowspan="11"| TAG_Compound
- | TAG_Int
- | colspan="2"| The color of the sky.
- | Example: 8364543, which is #7FA1FF in RGB.
- |-
- | colspan="2"| water_fog_color
- | TAG_Int
- | colspan="2"| Possibly the tint color when swimming.
- | Example: 8364543, which is #7FA1FF in RGB.
- |-
- | colspan="2"| fog_color
- | TAG_Int
- | colspan="2"| Possibly the color of the fog effect when looking past the view distance.
- | Example: 8364543, which is #7FA1FF in RGB.
- |-
- | colspan="2"| water_color
- | TAG_Int
- | colspan="2"| The tint color of the water blocks.
- | Example: 8364543, which is #7FA1FF in RGB.
- |-
- | colspan="2"| foliage_color
- | Optional TAG_Int
- | colspan="2"| The tint color of the grass.
- | Example: 8364543, which is #7FA1FF in RGB.
- |-
- | colspan="2"| grass_color
- | Optional TAG_Int
- | colspan="2"| ?
- | Example: 8364543, which is #7FA1FF in RGB.
- |-
- | colspan="2"| grass_color_modifier
- | Optional TAG_String
- | colspan="2"| Unknown, likely affects foliage color.
- | If set, known values are "swamp" and "dark_forest".
- |-
- | colspan="2"| music
- | Optional TAG_Compound
- | colspan="2"| Music properties for the biome.
- | If present, contains the fields: replace_current_music (TAG_Byte), sound (TAG_String), max_delay (TAG_Int), min_delay (TAG_Int).
- |-
- | colspan="2"| ambient_sound
- | Optional TAG_String
- | colspan="2"| Ambient soundtrack.
- | If present, the ID of a soundtrack. Example: "minecraft:ambient.basalt_deltas.loop".
- |-
- | colspan="2"| additions_sound
- | Optional TAG_Compound
- | colspan="2"| Additional ambient sound that plays randomly.
- | If present, contains the fields: sound (TAG_String), tick_chance (TAG_Double).
- |-
- | colspan="2"| mood_sound
- | Optional TAG_Compound
- | colspan="2"| Additional ambient sound that plays at an interval.
- | If present, contains the fields: sound (TAG_String), tick_delay (TAG_Int), offset (TAG_Double), block_search_extent (TAG_Int).
- |-
- | rowspan="2"| particle
- | probability
- | rowspan="2"| Optional TAG_Compound
- | TAG_FLOAT
- | rowspan="2"| Particles that appear randomly in the biome.
- | Possibly the probability of spawning the particle.
- | ?
- |-
- | options
- | TAG_COMPOUND
-  | The properties of the particle to spawn.
-  | Contains the field "type" (TAG_String), which identifies the particle type.
   |}
-Chat registry:
+=== Serverbound ===
-{| class="wikitable"
+==== Cookie Response (configuration) ====
- !Name
- !Type
- !style="width: 250px;" colspan="2"| Notes
- |-
- | type
- | TAG_String
- | The name of the registry. Always "minecraft:chat_type".
- |-
- | value
- | TAG_List
- | List of chat type registry entries (see below).
- |}
-Chat type:
+Response to a [[#Cookie_Request_(configuration)|Cookie Request (configuration)]] from the server. The Notchian server only accepts responses of up to 5 kiB in size.
-{| class="wikitable"
+{| class="wikitable" {{added}}
-  !Name
+  ! Packet ID
-  !Type
+ ! State
-  !style="width: 250px;" colspan="2"| Notes
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+  ! Notes
+ |-
+ | rowspan="4"| 0x01
+ | rowspan="4"| Configuration
+ | rowspan="4"| Server
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
   |-
-  | name
+  | colspan="2"| Has Payload
-  | TAG_String
+  | colspan="2"| Boolean
-  | The type's name (eg "minecraft:chat")
+  | The payload is only present if the cookie exists on the client.
   |-
-  | id
+  | colspan="2"| Payload Length
-  | TAG_Int
+  | colspan="2"| VarInt
-  |
+  | Length of the following byte array.
   |-
-  | elements
+  | colspan="2"| Payload
- | TAG_Compound
+  | colspan="2"| Optional Byte Array (5120)
-  | "chat" and "narration" TAG_Compound's (see below)
+ | The data of the cookie, if any.
   |}
-Chat type "chat" and "narration":
+==== 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 ==
-{| class="wikitable"
+=== Clientbound ===
- !Name
- !Type
- !style="width: 250px;" colspan="2"| Notes
- |-
- | translation_key
- | TAG_String
- |
- |-
- | style
- | TAG_Compound
- | Similar to Chat JSON (only present in "chat" TAG_Compound)
- |-
- | parameters
- | TAG_List of TAG_String
- | Values can be "sender", "target" and "content"
- |}
-==== Open Sign Editor ====
+==== Cookie Request (play) ====
-Sent when the client has placed a sign and is allowed to send [[#Update Sign|Update Sign]].  There must already be a sign at the given location (which the client does not do automatically) - send a [[#Block Update|Block Update]] first.
+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="2" | 0x31
+  | rowspan="1"| 0x16
-  | rowspan="2" | Play
+  | rowspan="1"| Play
-  | rowspan="2" | Client
+  | rowspan="1"| Client
-  | Location
+  | colspan="2"| Key
- | Position
+  | colspan="2"| Identifier
-  |
+  | The identifier of the cookie.
- |- {{added}}
- | Is Front Text
- | Boolean
-  | Whether the opened editor is for the front or on the back of the sign
   |}
-==== End Combat ====
+==== Debug Sample ====
-Unused by the Notchian client.  This data was once used for twitch.tv metadata circa 1.8.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 861: / Line 759: @@
   ! Notes
   |-
-  | rowspan="2"| 0x36
+  | rowspan="3"| 0x1B
-  | rowspan="2"| Play
+  | rowspan="3"| Play
-  | rowspan="2"| Client
+  | rowspan="3"| Client
-  | Duration
+  | Sample Length
   | VarInt
-  | Length of the combat in ticks.
+  | The length of the following array.
-  |- {{removed}}
+  |-
-  | Entity ID
+  | Sample
-  | Int
+  | Long Array
-  | ID of the primary opponent of the ended combat, or -1 if there is no obvious primary opponent.
+  | 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).
   |}
-==== Combat Death ====
+==== Login (play) ====
-Used to send a respawn screen.
 {| class="wikitable"
@@ Line 885: / Line 785: @@
   ! Notes
   |-
-  | rowspan="3"| 0x38
+  | rowspan="22"| 0x2B
-  | rowspan="3"| Play
+  | rowspan="22"| Play
-  | rowspan="3"| Client
+  | rowspan="22"| Client
- | Player ID
- | VarInt
- | Entity ID of the player that died (should match the client's entity ID).
- |- {{removed}}
   | Entity ID
-  | Int
+  | {{Type|Int}}
-  | The killer entity's ID, or -1 if there is no obvious killer.
+  | 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.
+ |-
+ | Portal cooldown
+ | {{Type|VarInt}}
+ | The number of ticks until the player can use the portal again.
   |-
-  | Message
+  | Enforces Secure Chat
-  | [[Chat]]
+  | {{Type|Boolean}}
-  | The death message.
+  |
   |}
 ==== Respawn ====
-To change the player's dimension (overworld/nether/end), send them a respawn packet with the appropriate dimension, followed by prechunks/chunks for the new dimension, and finally a position and look packet. You do not need to unload chunks, the client will do it automatically.
 {| class="wikitable"
@@ Line 913: / Line 887: @@
   ! Notes
   |-
-  | rowspan="12"| 0x41
+  | rowspan="12"| 0x47
   | rowspan="12"| Play
   | rowspan="12"| Client
   | Dimension Type
-  | Identifier
+  | {{change|Identifier|VarInt}}
-  | Valid dimensions are defined per dimension registry sent in [[#Login (play)|Login (play)]]
+  | 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
-  | Identifier
+  | {{Type|Identifier}}
   | Name of the dimension being spawned into.
   |-
   | Hashed seed
-  | Long
+  | {{Type|Long}}
   | First 8 bytes of the SHA-256 hash of the world's seed. Used client side for biome noise
   |-
-  | Gamemode
+  | Game mode
-  | Unsigned Byte
+  | {{Type|Unsigned Byte}}
   | 0: Survival, 1: Creative, 2: Adventure, 3: Spectator.
   |-
-  | Previous Gamemode
+  | Previous Game mode
-  | Byte
+  | {{Type|Byte}}
-  | -1: Undefined (null), 0: Survival, 1: Creative, 2: Adventure, 3: Spectator. The previous gamemode. Vanilla client uses this for the debug (F3 + N & F3 + F4) gamemode switch. (More information needed)
+  | -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
+  | {{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
-  | Boolean
+  | {{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.
- |-
- | 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.
   |-
   | Has death location
-  | Boolean
+  | {{Type|Boolean}}
   | If true, then the next two fields are present.
   |-
   | Death dimension Name
-  | Optional Identifier
+  | {{Type|Optional}} {{Type|Identifier}}
   | Name of the dimension the player died in.
   |-
   | Death location
-  | Optional Position
+  | {{Type|Optional}} {{Type|Position}}
   | The location that the player died at.
-  |- {{added}}
+  |-
   | Portal cooldown
-  | VarInt
+  | {{Type|VarInt}}
-  | The number of ticks until the player can use the portal again<sup>What impact does this have on the client? Needs more info</sup>.
+  | The number of ticks until the player can use the portal again.
+ |-
+ | Data kept
+ | {{Type|Byte}}
+ | Bit mask. 0x01: Keep attributes, 0x02: Keep metadata. Tells which data should be kept on the client side once the player has respawned.
+In the Notchian implementation, this is context dependent:
+* normal respawns (after death) keep no data;
+* exiting the end poem/credits keeps the attributes;
+* other dimension changes (portals or teleports) keep all data.
   |}
-{{Warning2|Avoid changing player's dimension to same dimension they were already in unless they are dead. If you change the dimension to one they are already in, weird bugs can occur, such as the player being unable to attack other players in new world (until they die and respawn).
+==== Store Cookie (play) ====
-Before 1.16, if you must respawn a player in the same dimension without killing them, send two respawn packets, one to a different world and then another to the world you want. You do not need to complete the first respawn; it only matters that you send two packets.}}
-==== Update Section Blocks ====
-Fired whenever 2 or more blocks are changed within the same chunk on the same tick.
-{{Warning|Changing blocks in chunks not loaded by the client is unsafe (see note on [[#Block Update|Block Update]]).}}
+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"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
   ! Bound To
-  ! Field Name
+  ! colspan="2"| Field Name
-  ! Field Type
+  ! colspan="2"| Field Type
   ! Notes
   |-
-  | rowspan="4"| 0x43
+  | rowspan="3"| 0x6B
-  | rowspan="4"| Play
+  | rowspan="3"| Play
-  | rowspan="4"| Client
+  | rowspan="3"| Client
-  | Chunk section position
+  | colspan="2"| Key
- | Long
+  | colspan="2"| Identifier
-  | Chunk section coordinate (encoded chunk x and z with each 22 bits, and section y with 20 bits, from left to right).
+  | The identifier of the cookie.
- |- {{removed}}
- | Suppress Light Updates
- | Boolean
-  | Whether to ignore light updates caused by the contained changes. Always inverse the preceding Update Light packet's "Trust Edges" bool
   |-
-  | Blocks array size
+  | colspan="2"| Payload Length
-  | VarInt
+  | colspan="2"| VarInt
-  | Number of elements in the following array.
+  | Length of the following byte array.
   |-
-  | Blocks
+  | colspan="2"| Payload
-  | Array of VarLong
+  | colspan="2"| Byte Array (5120)
-  | Each entry is composed of the block state id, shifted left by 12, and the relative block position in the chunk section (4 bits for x, z, and y, from left to right).
+  | The data of the cookie.
   |}
-Chunk section position is encoded:
+==== Transfer (play) ====
-<syntaxhighlight lang="java">
-((sectionX & 0x3FFFFF) << 42) | (sectionY & 0xFFFFF) | ((sectionZ & 0x3FFFFF) << 20);
-</syntaxhighlight>
-and decoded:
-<syntaxhighlight lang="java">
-sectionX = long >> 42;
-sectionY = long << 44 >> 44;
-sectionZ = long << 22 >> 42;
-</syntaxhighlight>
-Blocks are encoded:
-<syntaxhighlight lang="java">
-blockStateId << 12 | (blockLocalX << 8 | blockLocalZ << 4 | blockLocalY)
-//Uses the local position of the given block position relative to its respective chunk section
-</syntaxhighlight>
-==== Update Advancements ====
+Notifies the client that it should transfer to the given server. Cookies previously stored are preserved between server transfers.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 1,034: / Line 983: @@
   ! Notes
   |-
-  | rowspan="9"| 0x69
+  | rowspan="2"| 0x73
-  | rowspan="9"| Play
+  | rowspan="2"| Play
-  | rowspan="9"| Client
+  | rowspan="2"| Client
-  | colspan="2"| Reset/Clear
+  | colspan="2"| Host
-  | colspan="2"| Boolean
+  | colspan="2"| String
- | Whether to reset/clear the current advancements.
+  | The hostname of IP of the server.
- |-
- | colspan="2"| Mapping size
- | colspan="2"| VarInt
- | Size of the following array.
- |-
- | rowspan="2"| Advancement mapping
- | Key
- | rowspan="2"| Array
- | Identifier
-  | The identifier of the advancement.
- |-
- | Value
- | Advancement
- | See below
- |-
- | colspan="2"| List size
- | colspan="2"| VarInt
- | Size of the following array.
   |-
-  | colspan="2"| Identifiers
+  | colspan="2"| Port
- | colspan="2"| Array of Identifier
- | The identifiers of the advancements that should be removed.
- |-
- | colspan="2"| Progress size
   | colspan="2"| VarInt
- | Size of the following array.
+  | The port of the server.
- |-
- | rowspan="2"| Progress mapping
- | Key
- | rowspan="2"| Array
- | Identifier
-  | The identifier of the advancement.
- |-
- | Value
- | Advancement progress
- | See below.
   |}
-Advancement structure:
+==== Update Attributes ====
+Sets {{Minecraft Wiki|Attribute|attributes}} on the given entity.
 {| class="wikitable"
+ ! Packet ID
+ ! State
+ ! Bound To
   ! colspan="2"| Field Name
   ! colspan="2"| Field Type
   ! Notes
   |-
-  | colspan="2"| Has parent
+ | rowspan="6"| 0x71
-  | colspan="2"| Boolean
+ | rowspan="6"| Play
-  | Indicates whether the next field exists.
+ | rowspan="6"| Client
+  | colspan="2"| Entity ID
+  | colspan="2"| VarInt
+  |
   |-
-  | colspan="2"| Parent id
+  | colspan="2"| Number Of Properties
-  | colspan="2"| Optional Identifier
+  | colspan="2"| VarInt
-  | The identifier of the parent advancement.
+  | Number of elements in the following array.
   |-
-  | colspan="2"| Has display
+  | rowspan="4"| Property
-  | colspan="2"| Boolean
+  | {{change|Key|Id}}
- | Indicates whether the next field exists.
+  | rowspan="4"| Array
- |-
+  | {{change|Identifier|VarInt Enum}}
-  | colspan="2"| Display data
-  | colspan="2"| Optional advancement display
   | See below.
- |-
- | colspan="2"| Number of criteria
- | colspan="2"| VarInt
- | Size of the following array.
- |-
- | rowspan="2"| Criteria
- | Key
- | rowspan="2"| Array
- | Identifier
- | The identifier of the criterion.
   |-
   | Value
-  | '''Void'''
+  | Double
-  | There is ''no'' content written here. Perhaps this will be expanded in the future?
+  | See below.
- |-
- | colspan="2"| Array length
- | colspan="2"| VarInt
- | Number of arrays in the following array.
   |-
-  | rowspan="2"| Requirements
+  | Number Of Modifiers
- | Array length 2
- | rowspan="2"| Array
   | VarInt
   | Number of elements in the following array.
   |-
-  | Requirement
+  | Modifiers
-  | Array of String
+  | Array of Modifier Data
-  | Array of required criteria.
+  | See {{Minecraft Wiki|Attribute#Modifiers}}. Modifier Data defined below.
- |- {{added}}
- | colspan="2"| Sends telemetry data
- | colspan="2"| Boolean
- | Whether the client should include this achievement in the telemetry data when it's completed.
-The Notchian client only sends data for advancements on the <code>minecraft</code> namespace.
   |}
-Advancement display:
+Known Key values (see also {{Minecraft Wiki|Attribute#Modifiers}}):
+These changed between 24w03b and 24w13a, TODO: Update this
 {| class="wikitable"
- ! Field Name
- ! Field Type
- ! Notes
   |-
-  | Title
+ ! Id
-  | Chat
+ ! 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.
   |-
-  | Description
+  | 4
-  | Chat
+  | generic.attack_speed
-  |
+  | 4.0
+ | 0.0
+ | 1024.0
+ | Attack Speed.
+ |- {{added}}
+ | 5
+ | generic.block_interaction_range
+ | 4.5
+ | 0.0
+ | 64.0
+ | Block Interaction Range.
+ |- {{added}}
+ | 6
+ | generic.entity_interaction_range
+ | 3.0
+ | 0.0
+ | 64.0
+ | Entity Interaction Range.
   |-
-  | Icon
+  | 7
-  | [[Slot]]
+  | generic.flying_speed
-  |
+  | 0.4
+ | 0.0
+ | 1024.0
+ | Flying Speed.
   |-
-  | Frame type
+  | 8
-  | VarInt Enum
+  | generic.follow_range
-  | 0 = <code>task</code>, 1 = <code>challenge</code>, 2 = <code>goal</code>.
+  | 32.0
+ | 0.0
+ | 2048.0
+ | Follow Range.
   |-
-  | Flags
+  | 9
-  | Int
+  | horse.jump_strength
-  | 0x01: has background texture; 0x02: <code>show_toast</code>; 0x04: <code>hidden</code>.
+  | 0.7
+ | 0.0
+ | 2.0
+ | Jump Strength.
   |-
-  | Background texture
+  | 10
-  | Optional Identifier
+  | generic.knockback_resistance
-  | Background texture location.  Only if flags indicates it.
+ | 0.0
+  | 0.0
+  | 1.0
+ | Knockback Resistance.
   |-
-  | X coord
+  | 11
-  | Float
+  | generic.luck
-  |
+  | 0.0
+ | -1024.0
+ | 1024.0
+ | Luck.
   |-
-  | Y coord
+  | 12
-  | Float
+  | generic.max_absorption
-  |
+  | 0.0
-  |}
+  | 0.0
+  | 2048.0
-Advancement progress:
+  | Max Absorption.
-{| class="wikitable"
-  ! colspan="2"| Field Name
-  ! colspan="2"| Field Type
- ! Notes
   |-
-  | colspan="2"| Size
+  | 13
-  | colspan="2"| VarInt
+ | generic.max_health
-  | Size of the following array.
+  | 20.0
+ | 1.0
+ | 1024.0
+  | Max Health.
   |-
-  | rowspan="2"| Criteria
+  | 14
-  | Criterion identifier
+ | generic.movement_speed
-  | rowspan="2"| Array
+ | 0.7
-  | Identifier
+ | 0.0
-  | The identifier of the criterion.
+ | 1024.0
+ | Movement Speed.
+  |- {{added}}
+  | 15
+ | generic.scale
+ | 1.0
+ | 0.0625
+  | 16.0
+  | Scale.
   |-
-  | Criterion progress
+  | 16
-  | Criterion progress
+  | zombie.spawn_reinforcements
-  |
+  | 0.0
+ | 0.0
+ | 1.0
+ | Spawn Reinforcements Chance.
+ |- {{added}}
+ | 17
+ | generic.step_height
+ | 0.6
+ | 0.0
+ | 10.0
+ | Step Height.
   |}
-Criterion progress:
+''Modifier Data'' structure:
 {| class="wikitable"
+ |-
   ! Field Name
   ! Field Type
   ! Notes
   |-
-  | Achieved
+  | UUID
-  | Boolean
+  | UUID
-  | If true, next field is present.
+  |
+ |-
+ | Amount
+ | Double
+ | May be positive or negative.
   |-
-  | Date of achieving
+  | Operation
-  | Optional Long
+  | Byte
-  | As returned by [https://docs.oracle.com/javase/6/docs/api/java/util/Date.html#getTime() <code>Date.getTime</code>].
+  | See below.
   |}
-==== Feature Flags ====
+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
-Used to enable and disable features, generally experimental ones, on the client.
+All of the 0's are applied first, and then the 1's, and then the 2's.
+==== Entity Effect ====
 {| class="wikitable"
@@ Line 1,225: / Line 1,216: @@
   ! Notes
   |-
-  | rowspan="2"| 0x6B
+  | rowspan="7"| 0x72
-  | rowspan="2"| Play
+  | rowspan="7"| Play
-  | rowspan="2"| Client
+  | rowspan="7"| Client
-  | Total Features
+  | Entity ID
+ | VarInt
+ |
+ |-
+ | Effect ID
+ | VarInt
+ | See {{Minecraft Wiki|Status effect#Effect list|this table}}.
+ |-
+ | Amplifier
+ | Byte
+ | Notchian client displays effect level as Amplifier + 1.
+ |-
+ | Duration
   | VarInt
-  | Number of features that appear in the array below.
+  | Duration in ticks. (-1 for infinite)
+ |-
+ | Flags
+ | Byte
+ | Bit field, see below.
+ |- {{removed}}
+ | Has Factor Data
+ | Boolean
+ | Used in DARKNESS effect
+ |- {{removed}}
+ | Factor Codec
+ | NBT Tag
+ | See below
+ |}
+{{Need Info|What exact effect does the blend bit flag have on the client? What happens if it is used on effects besides DARKNESS?}}
+Within flags:
+* 0x01: Is ambient - was the effect spawned from a beacon?  All beacon-generated effects are ambient.  Ambient effects use a different icon in the HUD (blue border rather than gray).  If all effects on an entity are ambient, the [[Entity_metadata#Living Entity|"Is potion effect ambient" living metadata field]] should be set to true.  Usually should not be enabled.
+* 0x02: Show particles - should all particles from this effect be hidden?  Effects with particles hidden are not included in the calculation of the effect color, and are not rendered on the HUD (but are still rendered within the inventory).  Usually should be enabled.
+* 0x04: Show icon - should the icon be displayed on the client?  Usually should be enabled.
+* {{change||0x08: Blend - should the effect's hard-coded blending be applied?  Currently only used in the DARKNESS effect to apply extra void fog and adjust the gamma value for lighting.}}
+{{change|Factor Data|}}
+{| class="wikitable" {{removed}}
+ !Name
+ !Type
+ !style="width: 250px;" colspan="2"| Notes
+ |-
+ | padding_duration
+ | TAG_INT
+ |
+ |-
+ | factor_start
+ | TAG_FLOAT
+ |
+ |-
+ | factor_target
+ | TAG_FLOAT
+ |
   |-
-  | Feature Flags
+  | factor_current
-  | Identifier Array
+  | TAG_FLOAT
   |
+ |-
+ | effect_changed_timestamp
+ | TAG_INT
+ |-
+ | factor_previous_frame
+ | TAG_FLOAT
+ |-
+ | had_effect_last_tick
+ | TAG_BOOLEAN
   |}
-As of {{change|1.19.4|1.20}}, the following feature flags are available:
+=== Serverbound ===
-* minecraft:vanilla - enables vanilla features</li>
-* minecraft:bundle - enables support for the bundle</li>
-* {{change|minecraft:update_1_20 - enables all the Minecraft 1.20 features that are available in 1.19.4</li>|}}
-==== Update Recipes ====
+==== Chat Command ====
 {| class="wikitable"
@@ Line 1,253: / Line 1,301: @@
   ! Notes
   |-
-  | rowspan="4"| 0x6D
+  | rowspan="8"| 0x04
-  | rowspan="4"| Play
+  | rowspan="8"| Play
-  | rowspan="4"| Client
+  | rowspan="8"| Server
-  | colspan="2"| Num Recipes
+  | colspan="2"| Command
-  | colspan="2"| VarInt
+  | colspan="2"| {{Type|String}} (256)
-  | Number of elements in the following array.
+ | colspan="2"| The command typed by the client.
-  |-
+ |- {{removed}}
-  | rowspan="3"| Recipe
+ | colspan="2"| Timestamp
-  | Type
+ | colspan="2"| {{Type|Long}}
-  | rowspan="3"| Array
+ | colspan="2"| The timestamp that the command was executed.
-  | Identifier
+ |- {{removed}}
-  | The recipe type, see below.
+ | colspan="2"| Salt
-  |-
+ | colspan="2"| {{Type|Long}}
-  | Recipe ID
+ | colspan="2"| The salt for the following argument signatures.
-  | Identifier
+ |- {{removed}}
-  |
+ | colspan="2"| Array length
-  |-
+ | colspan="2"| {{Type|VarInt}}
-  | Data
+  | colspan="2"| Number of entries in the following array. The maximum length in Notchian server is 8.
-  | Varies
+  |- {{removed}}
-  | Additional data for the recipe.
+  | 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"|
   |}
-Recipe types:
-{| class="wikitable"
+==== Signed Chat Command ====
-  ! Type
-  ! Description
+{| class="wikitable" {{added}}
-  ! Data
+ ! Packet ID
+  ! State
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+  ! Notes
   |-
-  | <code>minecraft:crafting_shapeless</code>
+  | rowspan="8"| 0x05
- | Shapeless crafting recipe. All items in the ingredient list must be present, but in any order/slot.
+  | rowspan="8"| Play
-  | As follows:
+ | rowspan="8"| Server
-   {| class="wikitable"
+ | colspan="2"| Command
-    ! Name
+ | colspan="2"| String(256)
-    ! Type
+ | The command typed by the client.
-    ! Description
-    |-
-    | Group
-    | String
-    | Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
-    |-
-    |Category
-    |VarInt Enum
-    |Building = 0, Redstone = 1, Equipment = 2, Misc = 3
-    |-
-    | Ingredient count
-    | VarInt
-    | Number of elements in the following array.
-    |-
-    | Ingredients
-    | Array of Ingredient.
-    |
-    |-
-    | Result
-    | [[Slot]]
-    |
-    |}
   |-
-  | <code>minecraft:crafting_shaped</code>
+  | colspan="2"| Timestamp
- | Shaped crafting recipe. All items must be present in the same pattern (which may be flipped horizontally or translated).
+  | colspan="2"| Long
-  | As follows:
+ | The timestamp that the command was executed. Milliseconds since the Unix epoch.
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    | Width
-    | VarInt
-    |
-    |-
-    | Height
-    | VarInt
-    |
-    |-
-    | Group
-    | String
-    | Used to group similar recipes together in the recipe book. Tag is present in recipe JSON.
-    |-
-    |Category
-    |VarInt Enum
-    |Building = 0, Redstone = 1, Equipment = 2, Misc = 3
-    |-
-    | Ingredients
-    | Array of Ingredient
-    | Length is <code>width * height</code>. Indexed by <code>x + (y * width)</code>.
-    |-
-    | Result
-    | [[Slot]]
-    |-
-    | Show notification
-    | Boolean
-    | Show a toast when the recipe is [[Protocol#Update_Recipe_Book|added]].
-    |}
   |-
-  | <code>minecraft:crafting_special_armordye</code>
+  | colspan="2"| Salt
- | Recipe for dying leather armor
+ | colspan="2"| Long
- | rowspan="14" | As follows:
+ | The salt for the following argument signatures.
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    |Category
-    |VarInt Enum
-    |Building = 0, Redstone = 1, Equipment = 2, Misc = 3
-    |}
   |-
-  | <code>minecraft:crafting_special_bookcloning</code>
+  | colspan="2"| Argument Signature Count
-  | Recipe for copying contents of written books
+ | colspan="2"| VarInt
+  | Number of elements in the following array. The maximum length in Notchian server is 8.
   |-
-  | <code>minecraft:crafting_special_mapcloning</code>
+  | rowspan="2"| Argument Signatures
-  | Recipe for copying maps
+ | Name
+ | rowspan="2"| Array
+ | String(16)
+  | The name of the argument that is signed by the following signature.
   |-
-  | <code>minecraft:crafting_special_mapextending</code>
+  | Signature
-  | Recipe for adding paper to maps
+  | ByteArray(256)
+ | The signature that verifies the argument. Always 256 bytes and is not length-prefixed.
   |-
-  | <code>minecraft:crafting_special_firework_rocket</code>
+  | colspan="2"| Seen Messages Offset
-  | Recipe for making firework rockets
+ | colspan="2"| VarInt
+  |
   |-
-  | <code>minecraft:crafting_special_firework_star</code>
+  | colspan="2"| Seen Messages Acknowledged
- | Recipe for making firework stars
+  | colspan="2"| Fixed BitSet(20)
- |-
+  |
- | <code>minecraft:crafting_special_firework_star_fade</code>
- | Recipe for making firework stars fade between multiple colors
- |-
- | <code>minecraft:crafting_special_repairitem</code>
- | Recipe for repairing items via crafting
- |-
- | <code>minecraft:crafting_special_tippedarrow</code>
- | Recipe for crafting tipped arrows
- |-
- | <code>minecraft:crafting_special_bannerduplicate</code>
- | Recipe for copying banner patterns
- |-
- | <code>minecraft:crafting_special_shielddecoration</code>
- | Recipe for applying a banner's pattern to a shield
- |-
- | <code>minecraft:crafting_special_shulkerboxcoloring</code>
- | Recipe for recoloring a shulker box
- |-
- | <code>minecraft:crafting_special_suspiciousstew</code>
- | Recipe for crafting suspicious stews
- |-
- | <code>minecraft:crafting_decorated_pot</code>
- | Recipe for crafting decorated pots
-{{change|{{Warning|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled}}|}}
- |-
- | <code>minecraft:smelting</code>
- | Smelting recipe
- | rowspan="4"| As follows:
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    | Group
-    | String
-    | Used to group similar recipes together in the recipe book.
-    |-
-    |Category
-    |VarInt Enum
-    |Food = 0, Blocks = 1, Misc = 2
-    |-
-    | Ingredient
-    | Ingredient
-    |
-    |-
-    | Result
-    | [[Slot]]
-    |
-    |-
-    | Experience
-    | Float
-    |
-    |-
-    | Cooking time
-    | VarInt
-    |
-    |}
- |-
- | <code>minecraft:blasting</code>
- | Blast furnace recipe
- |-
- | <code>minecraft:smoking</code>
- | Smoker recipe
- |-
- | <code>minecraft:campfire_cooking</code>
- | Campfire recipe
- |-
- | <code>minecraft:stonecutting</code>
- | Stonecutter recipe
- | As follows:
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    | Group
-    | String
-    | Used to group similar recipes together in the recipe book.  Tag is present in recipe JSON.
-    |-
-    | Ingredient
-    | Ingredient
-    |
-    |-
-    | Result
-    | [[Slot]]
-    |
-    |}
- |- {{removed}}
- | <code>minecraft:smithing</code>
- | Smithing table recipe
-{{Warning|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was '''not''' enabled}}
-  | As follows:
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    | Base
-    | Ingredient
-    | First item.
-    |-
-    | Addition
-    | Ingredient
-    | Second item.
-    |-
-    | Result
-    | [[Slot]]
-    |
-    |}
- |-
- | <code>minecraft:smithing_transform</code>
- | Recipe for smithing netherite gear
-{{change|{{Warning2|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled. It supersedes the <code>minecraft:smithing</code> recipe type}}|}}
- | As follows:
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    | Template
-    | Ingredient
-    | The smithing template.
-    |-
-    | Base
-    | Ingredient
-    | The base item.
-    |-
-    | Addition
-    | Ingredient
-    | The additional ingredient.
-    |-
-    | Result
-    | [[Slot]]
-    |
-    |}
- |-
- | <code>minecraft:smithing_trim</code>
- | Recipe for applying armor trims
-{{change|{{Warning2|The Notchian server only sends this recipe if [[Protocol#Feature_Flags|feature flag]] '''update_1_20''' was enabled. It supersedes the <code>minecraft:smithing</code> recipe type}}|}}
-  | As follows:
-   {| class="wikitable"
-    ! Name
-    ! Type
-    ! Description
-    |-
-    | Template
-    | Ingredient
-    | The smithing template.
-    |-
-    | Base
-    | Ingredient
-    | The base item.
-    |-
-    | Addition
-    | Ingredient
-    | The additional ingredient.
-    |}
   |}
-Ingredient is defined as:
+==== Cookie Response (play) ====
+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}}
-  ! Name
+  ! Packet ID
-  ! Type
+ ! State
-  ! Description
+ ! Bound To
+ ! colspan="2"| Field Name
+  ! colspan="2"| Field Type
+  ! Notes
+ |-
+ | rowspan="4"| 0x11
+ | rowspan="4"| Play
+ | rowspan="4"| Server
+ | colspan="2"| Key
+ | colspan="2"| Identifier
+ | The identifier of the cookie.
+ |-
+ | colspan="2"| Has Payload
+ | colspan="2"| Boolean
+ | The payload is only present if the cookie exists on the client.
   |-
-  | Count
+  | colspan="2"| Payload Length
-  | VarInt
+  | colspan="2"| Optional VarInt
-  | Number of elements in the following array.
+  | Length of the following byte array.
   |-
-  | Items
+  | colspan="2"| Payload
-  | Array of [[Slot]]
+  | colspan="2"| Optional Byte Array (5120)
-  | Any item in this array may be used for the recipe.  The count of each item should be 1.
+  | The data of the cookie, if any.
   |}
-=== Serverbound ===
+==== Debug Sample Subscription ====
-==== Update Sign ====
-This message is sent from the client to the server when the “Done” button is pushed after placing a sign.
-The server only accepts this packet after [[#Open Sign Editor|Open Sign Editor]], otherwise this packet is silently ignored.
-{| class="wikitable"
+{| class="wikitable" {{added}}
   ! Packet ID
   ! State
@@ Line 1,566: / Line 1,430: @@
   ! Notes
   |-
-  | rowspan="6"| 0x2E
+  | 0x13
-  | rowspan="6"| Play
+  | Play
-  | rowspan="6"| Server
+  | Server
-  | Location
+  | Sample Type
- | Position
+  | VarInt Enum
- | Block Coordinates.
+  | The type of debug sample to subscribe to. Currently always 0 (TICK_TIME).
- |- {{added}}
- | Is Front Text
- | Boolean
- | Whether the updated text is in front or on the back of the sign
- |-
- | Line 1
- | String (384)
- | First line of text in the sign.
- |-
- | Line 2
- | String (384)
- | Second line of text in the sign.
- |-
-  | Line 3
- | String (384)
-  | Third line of text in the sign.
- |-
- | Line 4
- | String (384)
- | Fourth line of text in the sign.
   |}
-== Status ==
-=== Clientbound ===
-No changes so far.
-=== Serverbound ===
-No changes so far.
-== Login ==
-=== Clientbound ===
-No changes so far.
-=== Serverbound ===
-No changes so far.
 [[Category:Minecraft Modern]]

Difference between revisions of "Pre-release protocol"

Latest revision as of 19:57, 25 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