bedrock-protocol-docs/changelog_859_10_02_25.md

Minecraft Network Protocol Docs 10/2/25

For r21_u12, Network Protocol Version 859

Dev Notes

We introduced a new metadata system to improve documentation generation. This system includes a json folder that leverages JSON Schema to provide a clearer description of packet structures. Using this schema, we also generated new HTML pages (docs) for packets and enums, consolidating all relevant information into a single, comprehensive HTML table. This approach replaces our existing SVG diagrams. So far, we’ve rolled this out to 154 packets, with plans to transition the rest in the coming releases.

New Packets

• GraphicsParameterOverridePacket (331) [docs/GraphicsOverrideParameterPacket.html]

Modified Packets

• ShowStoreOfferPacket

  • Offer ID uses the underlying UUID object over a string, alligning with other uses of mcid::uuid.

• CameraInstructionPacket

  • Added bool for splines in the camera instruction packet
  • Added data options to spline camera instruction (time, curve, keyframes)
  • Added 'attach_to_entity' and 'detach_from_entity' camera commands for 'minecraft:fixed_boom' and 'minecraft:follow_orbit' presets. Accessible under the Experimental Creator Cameras experimental toggle.

Modified Enums

ActorEvent:

• Added SHAKE_WETNESS_STOP (79) []

DisconnectFailReason:

• Added DiscoveryEnvironmentMismatch (123) []
• Added HostWithoutKeys (124) []

ExpressionOp:

• Added InverseLerp (78) []
• Added EaseInQuad (79) []
• Added EaseOutQuad (80) []
• Added EaseInOutQuad (81) []
• Added EaseInCubic (82) []
• Added EaseOutCubic (83) []
• Added EaseInOutCubic (84) []
• Added EaseInQuart (85) []
• Added EaseOutQuart (86) []
• Added EaseInOutQuart (87) []
• Added EaseInQuint (88) []
• Added EaseOutQuint (89) []
• Added EaseInOutQuint (90) []
• Added EaseInSine (91) []
• Added EaseOutSine (92) []
• Added EaseInOutSine (93) []
• Added EaseInExpo (94) []
• Added EaseOutExpo (95) []
• Added EaseInOutExpo (96) []
• Added EaseInCirc (97) []
• Added EaseOutCirc (98) []
• Added EaseInOutCirc (99) []
• Added EaseInBounce (100) []
• Added EaseOutBounce (101) []
• Added EaseInOutBounce (102) []
• Added EaseInBack (103) []
• Added EaseOutBack (104) []
• Added EaseInOutBack (105) []
• Added EaseInElastic (106) []
• Added EaseOutElastic (107) []
• Added EaseInOutElastic (108) []

UpdateType:

• Added None (0) []
• Added Neighbors (1) []
• Added Connections (2) []
• Removed ClearOverrides
• Removed RemoveOverride
• Removed SetIntOverride
• Removed SetFloatOverride

Input Mode:

• Deprecated MotionController (4)

Raw Protocol Version Changelog

845: Deprecated ClientPlayMode::Viewer, Reality, Placement, LivingRoom, and ExitLevelLivingRoom 
846: Modified ShowStoreOfferPacket's binary format 
847: Adds ActorEvent::SHAKE_WETNESS_STOP
848: Deprecated InputMode::MotionController
849: Added ChunkState::StructurePostProcessing and ChunkState::StructurePostProcessed
850: Added from ExpressionOp::InverseLerp to ExpressionOp::EaseInOutElastic
851: Changed WaxOn, WaxOff and Scrape LevelEvents to emit particles at exact Vec3 position
852: Add bool for default surface builder to BiomeDefinitionChunkGenData (only relevant for client-side chunk generation)
854: Added GraphicsOverrideParameterPacket
855: Fixing replacement biome data to be read/written correctly from BiomeDefinitionData
856: Added bool for splines in the camera instruction packet
858: Added data options to spline camera instruction (time, curve, keyframes)
859: Added attach_to_entity and detach_from_entity 3rd person camera commands