Pre-release protocol
This page documents the changes from the last stable Minecraft release (currently 1.20.6, protocol 766) to the current pre-release (currently 1.21-pre2, protocol Snapshot 200). Note that this page contains bleeding-edge information that may not be completely or correctly documented.
One who wishes to commandeer the merging of this into Protocol when an update is made must be sure to respect any changes that may have occurred to the respective packets there.
Contents
Data types
No changes documented so far.
Packets
| ID | Packet name | Documentation | |
|---|---|---|---|
| Configuration clientbound | |||
| 0x0F | Clientbound Report Details (configuration) | Pre | |
| 0x10 | Clientbound Server Links (configuration) | Pre | |
| Play clientbound | |||
| 0x7A | Clientbound Report Details (play) | Pre | |
| 0x7B | Clientbound Server Links (play) | Pre | |
Handshake
No changes so far.
Status
No changes so far.
Login
No changes so far.
Configuration
Clientbound
Clientbound Report Details (configuration)
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
| Packet ID | State | Bound To | Field Name | Field Type | Notes | ||
|---|---|---|---|---|---|---|---|
| 0x0F | Configuration | Client | Details Count | VarInt (32) | The number of details in the following array. | ||
| Details | Title | Array | String (128) | ||||
| Description | String (4096) | ||||||
Clientbound Server Links (configuration)
This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).
| Packet ID | State | Bound To | Field Name | Field Type | Notes | ||
|---|---|---|---|---|---|---|---|
| 0x10 | Configuration | Client | Links Count | VarInt | The number of links in the following array. | ||
| Links | Is built-in | Array | Boolean | Determines if the following label is built-in (from enum) or custom (text component). | |||
| Label | VarInt Enum / Text Component | See below. | |||||
| URL | String | Valid URL. | |||||
| ID | Name | Notes |
|---|---|---|
| 0 | Bug Report | Displayed on connection error screen; included as a comment in the disconnection report. |
| 1 | Community Guidelines | |
| 2 | Support | |
| 3 | Status | |
| 4 | Feedback | |
| 5 | Community | |
| 6 | Website | |
| 7 | Forums | |
| 8 | News | |
| 9 | Announcements |
Serverbound
No changes so far.
Play
Clientbound
Clientbound Report Details (play)
Contains a list of key-value text entries that are included in any crash or disconnection report generated during connection to the server.
| Packet ID | State | Bound To | Field Name | Field Type | Notes | ||
|---|---|---|---|---|---|---|---|
| 0x7A | Configuration | Client | Details Count | VarInt (32) | The number of details in the following array. | ||
| Details | Title | Array | String (128) | ||||
| Description | String (4096) | ||||||
Clientbound Server Links (play)
This packet contains a list of links that the Notchian client will display in the menu available from the pause menu. Link labels can be built-in or custom (i.e., any text).
| Packet ID | State | Bound To | Field Name | Field Type | Notes | ||
|---|---|---|---|---|---|---|---|
| 0x7B | Configuration | Client | Links Count | VarInt | The number of links in the following array. | ||
| Links | Is built-in | Array | Boolean | Determines if the following label is built-in (from enum) or custom (text component). | |||
| Label | VarInt Enum / Text Component | See below. | |||||
| URL | String | Valid URL. | |||||
| ID | Name | Notes |
|---|---|---|
| 0 | Bug Report | Displayed on connection error screen; included as a comment in the disconnection report. |
| 1 | Community Guidelines | |
| 2 | Support | |
| 3 | Status | |
| 4 | Feedback | |
| 5 | Community | |
| 6 | Website | |
| 7 | Forums | |
| 8 | News | |
| 9 | Announcements |
Serverbound
No changes so far.
