feat: add Minecraft Java 26.3 support

AGENTS.md

@@ -2,7 +2,7 @@
 
 ## Project overview
 
-UMPK is a .NET 10 library for the Minecraft Java protocol. One codebase supports 49 protocol datasets from protocol 47 through 776. Vanilla source, official artifacts, and real packet captures are the acceptance oracle.
+UMPK is a .NET 10 library for the Minecraft Java protocol. One codebase supports 50 protocol datasets from protocol 47 through 777. Vanilla source, official artifacts, and real packet captures are the acceptance oracle.
 
 ## Local skills
 

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 This file records notable changes to UMPK.
 
+## 0.9.0-beta.2 - 2026-09-22
+
+- Add Minecraft Java 26.3 (protocol 777) support and update affected packet codecs.
+
 ## 0.9.0-beta.1 - 2026-09-12
 
 - First public beta release.

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing to UMPK
 
-Thanks for helping with UMPK. Small, well-tested changes are easier to review and safer across 49 protocol revisions.
+Thanks for helping with UMPK. Small, well-tested changes are easier to review and safer across 50 protocol revisions.
 
 Please follow the [Code of Conduct](CODE_OF_CONDUCT.md).
 

Directory.Build.props

@@ -1,8 +1,8 @@
 <Project>
   <PropertyGroup>
     <TargetFramework>net10.0</TargetFramework>
-    <!-- UMPK's version. 0.9.0-beta.1 states both "pre-1.0" and "prerelease" honestly while Umpk.Commands still depends on prerelease Brigadier.NET. It flows into AssemblyInformationalVersionAttribute, which Umpk.Client.UmpkVersion reads back and which the consuming host reads through the same attribute, so this property is the ONE place the number is stated. A build that also sets SourceRevisionId (SourceLink does) gets "0.9.0-beta.1+<sha>"; UmpkVersion parses either shape. -->
-    <Version>0.9.0-beta.1</Version>
+    <!-- UMPK's version. 0.9.0-beta.2 states both "pre-1.0" and "prerelease" honestly while Umpk.Commands still depends on prerelease Brigadier.NET. It flows into AssemblyInformationalVersionAttribute, which Umpk.Client.UmpkVersion reads back and which the consuming host reads through the same attribute, so this property is the ONE place the number is stated. A build that also sets SourceRevisionId (SourceLink does) gets "0.9.0-beta.2+<sha>"; UmpkVersion parses either shape. -->
+    <Version>0.9.0-beta.2</Version>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>

README.md

@@ -26,7 +26,7 @@ UMPK supports 49 Java protocol revisions across 72 named Minecraft releases. Pro
 
 ## Supported Minecraft versions
 
-UMPK supports Java Edition play protocols from 1.8 through 26.2.
+UMPK supports Java Edition play protocols from 1.8 through 26.3.
 
 | Family | Supported releases |
 | --- | --- |
@@ -53,7 +53,7 @@ Minecraft versions earlier than 1.8 are not supported. The legacy status ping ca
 Install the [.NET 10 SDK](https://dotnet.microsoft.com/download/dotnet/10.0), then add the complete client stack:
 
 ```bash
-dotnet add package Umpk --version 0.9.0-beta.1
+dotnet add package Umpk --version 0.9.0-beta.2
 ```
 
 You can instead install focused packages such as `Umpk.Protocol.Java`, `Umpk.Nbt`, or `Umpk.Text`. To build the source:
@@ -99,7 +99,7 @@ flowchart LR
     Runtime -->|uses| Protocol[Protocol foundations<br/>Protocol.Java, Nbt, Core]
     Runtime -->|uses| Generated[Generated version data<br/>Data.Java, Data.Lang]
 
-    Dataset[(data/java<br/>49 protocol datasets)] --> DataGen[Umpk.DataGen]
+    Dataset[(data/java<br/>50 protocol datasets)] --> DataGen[Umpk.DataGen]
     DataGen -->|emits| Generated
     Generated -->|binds codecs and registries| Protocol
     Protocol <-->|Minecraft Java protocol| Server[Minecraft Java server]

data/java/777/argument_types.json

@@ -0,0 +1,261 @@
+{
+  "_provenance": {
+    "version": "26.3",
+    "protocol": 777,
+    "mapping_source": "vineflower-direct",
+    "sources": [
+      "reports/registries.json#minecraft:command_argument_type"
+    ],
+    "kind": "extracted"
+  },
+  "entries": [
+    {
+      "name": "brigadier:bool",
+      "id": 0
+    },
+    {
+      "name": "brigadier:float",
+      "id": 1
+    },
+    {
+      "name": "brigadier:double",
+      "id": 2
+    },
+    {
+      "name": "brigadier:integer",
+      "id": 3
+    },
+    {
+      "name": "brigadier:long",
+      "id": 4
+    },
+    {
+      "name": "brigadier:string",
+      "id": 5
+    },
+    {
+      "name": "minecraft:entity",
+      "id": 6
+    },
+    {
+      "name": "minecraft:game_profile",
+      "id": 7
+    },
+    {
+      "name": "minecraft:block_pos",
+      "id": 8
+    },
+    {
+      "name": "minecraft:column_pos",
+      "id": 9
+    },
+    {
+      "name": "minecraft:vec3",
+      "id": 10
+    },
+    {
+      "name": "minecraft:vec2",
+      "id": 11
+    },
+    {
+      "name": "minecraft:block_state",
+      "id": 12
+    },
+    {
+      "name": "minecraft:block_predicate",
+      "id": 13
+    },
+    {
+      "name": "minecraft:item_stack",
+      "id": 14
+    },
+    {
+      "name": "minecraft:item_predicate",
+      "id": 15
+    },
+    {
+      "name": "minecraft:team_color",
+      "id": 16
+    },
+    {
+      "name": "minecraft:hex_color",
+      "id": 17
+    },
+    {
+      "name": "minecraft:component",
+      "id": 18
+    },
+    {
+      "name": "minecraft:style",
+      "id": 19
+    },
+    {
+      "name": "minecraft:message",
+      "id": 20
+    },
+    {
+      "name": "minecraft:nbt_compound_tag",
+      "id": 21
+    },
+    {
+      "name": "minecraft:nbt_tag",
+      "id": 22
+    },
+    {
+      "name": "minecraft:nbt_path",
+      "id": 23
+    },
+    {
+      "name": "minecraft:objective",
+      "id": 24
+    },
+    {
+      "name": "minecraft:objective_criteria",
+      "id": 25
+    },
+    {
+      "name": "minecraft:operation",
+      "id": 26
+    },
+    {
+      "name": "minecraft:particle",
+      "id": 27
+    },
+    {
+      "name": "minecraft:angle",
+      "id": 28
+    },
+    {
+      "name": "minecraft:rotation",
+      "id": 29
+    },
+    {
+      "name": "minecraft:scoreboard_slot",
+      "id": 30
+    },
+    {
+      "name": "minecraft:score_holder",
+      "id": 31
+    },
+    {
+      "name": "minecraft:swizzle",
+      "id": 32
+    },
+    {
+      "name": "minecraft:team",
+      "id": 33
+    },
+    {
+      "name": "minecraft:item_slot",
+      "id": 34
+    },
+    {
+      "name": "minecraft:item_slots",
+      "id": 35
+    },
+    {
+      "name": "minecraft:resource_location",
+      "id": 36
+    },
+    {
+      "name": "minecraft:function",
+      "id": 37
+    },
+    {
+      "name": "minecraft:entity_anchor",
+      "id": 38
+    },
+    {
+      "name": "minecraft:int_range",
+      "id": 39
+    },
+    {
+      "name": "minecraft:float_range",
+      "id": 40
+    },
+    {
+      "name": "minecraft:dimension",
+      "id": 41
+    },
+    {
+      "name": "minecraft:gamemode",
+      "id": 42
+    },
+    {
+      "name": "minecraft:time",
+      "id": 43
+    },
+    {
+      "name": "minecraft:resource_or_tag",
+      "id": 44
+    },
+    {
+      "name": "minecraft:resource_or_tag_key",
+      "id": 45
+    },
+    {
+      "name": "minecraft:resource",
+      "id": 46
+    },
+    {
+      "name": "minecraft:resource_key",
+      "id": 47
+    },
+    {
+      "name": "minecraft:resource_selector",
+      "id": 48
+    },
+    {
+      "name": "minecraft:template_mirror",
+      "id": 49
+    },
+    {
+      "name": "minecraft:template_rotation",
+      "id": 50
+    },
+    {
+      "name": "minecraft:heightmap",
+      "id": 51
+    },
+    {
+      "name": "minecraft:loot_table",
+      "id": 52
+    },
+    {
+      "name": "minecraft:loot_predicate",
+      "id": 53
+    },
+    {
+      "name": "minecraft:loot_modifier",
+      "id": 54
+    },
+    {
+      "name": "minecraft:context_float_provider",
+      "id": 55
+    },
+    {
+      "name": "minecraft:context_int_provider",
+      "id": 56
+    },
+    {
+      "name": "minecraft:slot_source",
+      "id": 57
+    },
+    {
+      "name": "minecraft:dialog",
+      "id": 58
+    },
+    {
+      "name": "minecraft:feature",
+      "id": 59
+    },
+    {
+      "name": "minecraft:swing_animation",
+      "id": 60
+    },
+    {
+      "name": "minecraft:uuid",
+      "id": 61
+    }
+  ]
+}