Pre-release protocol

This page documents the changes from the last stable Minecraft release (currently 1.15.2, protocol 578) to the current pre-release (currently 20w06a, protocol 701). 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.

Data types
No changes so far.

New/modified data types
No changes so far.

Entity Metadata
No changes so far.

Block Actions
No changes so far.

Inventories
No changes so far.

Plugin Channels
No changes so far.

Clientbound
No changes so far.

Serverbound
No changes so far.

Clientbound
There are no clientbound packets in the Handshaking state, since the protocol immediately switches to a different state after the client sends the first packet.

Handshake
This causes the server to switch into the target state.

Clientbound
No changes so far.

Serverbound
No changes so far.

Clientbound
No changes so far.

Serverbound
No changes so far.