Make the CultLib Unity package depend on org.gamecult.cultmath

GameCult.Caching.MessagePack now references CultMath, so the Unity package
declares org.gamecult.cultmath in package.json, references CultMath.dll from the
asmdef, and the package build refuses to ship a second CultMath.dll and checks
the asmdef against the shipped plus external assembly lists.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

scripts/build-unity-package.ps1

@@ -128,6 +128,19 @@ $expectedAssemblies = @(
   "System.Text.Json.dll",
   "System.Threading.Channels.dll"
 )
+# Assemblies the package references but never ships: org.gamecult.cultmath owns CultMath.dll, and the
+# package.json dependency delivers it. A second copy in Runtime\Plugins would be a duplicate assembly.
+$externalAssemblies = @("CultMath.dll")
+$asmdef = Get-Content -LiteralPath (Join-Path $templateRoot "Runtime\GameCult.CultLib.asmdef") -Raw | ConvertFrom-Json
+$referencedAssemblies = @($asmdef.precompiledReferences | Sort-Object)
+$declaredAssemblies = @($expectedAssemblies + $externalAssemblies | Sort-Object)
+if (($referencedAssemblies -join "|") -ne ($declaredAssemblies -join "|")) {
+  throw "GameCult.CultLib.asmdef precompiledReferences differ from the shipped plus external assembly lists."
+}
+$cultMathDependency = (Get-Content -LiteralPath (Join-Path $templateRoot "package.json") -Raw | ConvertFrom-Json).dependencies.'org.gamecult.cultmath'
+if ([string]::IsNullOrWhiteSpace($cultMathDependency)) {
+  throw "package.json must declare org.gamecult.cultmath, which supplies CultMath.dll."
+}
 $publishedByName = @{}
 foreach ($assembly in Get-ChildItem -LiteralPath $publishRoot -Filter "*.dll") {
   $publishedByName[$assembly.Name] = $assembly
@@ -154,6 +167,11 @@ foreach ($assemblyName in $expectedAssemblies) {
     Copy-Item -LiteralPath $pdb -Destination $pluginRoot
   }
 }
+foreach ($external in $externalAssemblies) {
+  if (Test-Path -LiteralPath (Join-Path $pluginRoot $external)) {
+    throw "CultLib Unity package must not ship $external; org.gamecult.cultmath owns it."
+  }
+}
 $nativePluginRoot = Join-Path $pluginRoot "x86_64"
 New-Item -ItemType Directory -Force -Path $nativePluginRoot | Out-Null
 Copy-Item -LiteralPath (Join-Path $quicNativeRoot "gamecult_mesh_quic_native.dll") -Destination $nativePluginRoot

unity/org.gamecult.cultlib/README.md

@@ -17,6 +17,15 @@ Install version `1.0.57` through Unity Package Manager with:
 https://github.com/GameCult/CultLib.git?path=/unity/org.gamecult.cultlib#cultlib-unity-v1.0.57
 ```
 
+The package depends on `org.gamecult.cultmath` (0.3.0 or later) and does not
+carry its own `CultMath.dll`. Unity Package Manager resolves git packages only
+from the project manifest, so add CultMath beside CultLib in
+`Packages/manifest.json`:
+
+```text
+"org.gamecult.cultmath": "https://github.com/GameCult/CultLib.git?path=/packages/cultmath/unity/org.gamecult.cultmath#cultmath-unity-v0.3.0"
+```
+
 CultMesh chooses mapped memory for reachable same-machine bodies and advertised
 QUIC for remote realtime state. Applications register the packaged
 `CultMeshNativeQuicRealtimeTransportConnector`; they do not load or configure

unity/org.gamecult.cultlib/Runtime/GameCult.CultLib.asmdef

@@ -8,6 +8,7 @@
   "overrideReferences": true,
   "precompiledReferences": [
     "ConcurrentCollections.dll",
+    "CultMath.dll",
     "GameCult.Caching.dll",
     "GameCult.Caching.MessagePack.dll",
     "GameCult.Logging.dll",

unity/org.gamecult.cultlib/package.json

@@ -3,6 +3,9 @@
   "displayName": "CultLib",
   "version": "1.0.60",
   "unity": "2021.3",
+  "dependencies": {
+    "org.gamecult.cultmath": "0.3.0"
+  },
   "description": "CultCache, CultNet, and CultMesh managed runtime assemblies for Unity.",
   "license": "MIT",
   "author": {