diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0488358..022b272 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.0] - 2026-09-23
+
+An engine release, and a minor version for two reasons at once: the idiomatic
+API gains members, and the native mirror breaks where Box3D's C API broke.
+Before 1.0 a break is carried by a minor version, and every one is listed below.
+
 Box3D moves from `3fc20f5` to `9e5a4cd`, the six upstream commits between them.
 The idiomatic `Box3D.NET` only gains members: nothing in it is removed or
 changes signature, and package validation against the last release reports no
@@ -617,7 +623,8 @@ rather than left standing:
   follow Box3D and are documented rather than corrected.
 - Single precision only. Box3D's large-world mode changes the ABI and would need
   a separate package.
-[Unreleased]: https://github.com/Miguel249/Box3D.NET/compare/v0.4.0...HEAD
+[Unreleased]: https://github.com/Miguel249/Box3D.NET/compare/v0.5.0...HEAD
+[0.5.0]: https://github.com/Miguel249/Box3D.NET/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/Miguel249/Box3D.NET/compare/v0.3.0...v0.4.0
 [0.3.0]: https://github.com/Miguel249/Box3D.NET/compare/v0.2.0...v0.3.0
 [0.2.0]: https://github.com/Miguel249/Box3D.NET/compare/v0.1.0...v0.2.0
diff --git a/Directory.Build.props b/Directory.Build.props
index 3a22a93..b7d483c 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -71,7 +71,7 @@
 
   <!-- Package metadata. -->
   <PropertyGroup>
-    <VersionPrefix>0.4.0</VersionPrefix>
+    <VersionPrefix>0.5.0</VersionPrefix>
     <Authors>Box3D.NET contributors</Authors>
     <Company>Box3D.NET</Company>
     <Product>Box3D.NET</Product>
diff --git a/Directory.Build.targets b/Directory.Build.targets
index 42ed680..86d854a 100644
--- a/Directory.Build.targets
+++ b/Directory.Build.targets
@@ -62,7 +62,18 @@
       VersionPrefix, not in the one after it.
     -->
     <EnablePackageValidation>true</EnablePackageValidation>
-    <PackageValidationBaselineVersion>0.3.0</PackageValidationBaselineVersion>
+    <PackageValidationBaselineVersion>0.4.0</PackageValidationBaselineVersion>
+
+    <!--
+      A break recorded in CompatibilitySuppressions.xml is keyed by the pair of
+      assemblies it was found between, and a package packed here has two
+      possible shapes. With Box3DTargetApple, as CI and the release pack, the
+      baseline's iOS assembly is compared with the new iOS assembly; without
+      it, as a local pack, it is compared with net8.0 instead. The file records
+      both pairs, so whichever build runs finds the other pair's entries
+      unused, and that must not fail it.
+    -->
+    <ApiCompatPermitUnnecessarySuppressions>true</ApiCompatPermitUnnecessarySuppressions>
   </PropertyGroup>
 
   <ItemGroup Condition="'$(IsPackable)' == 'true'">
diff --git a/src/Box3D.NET.Native/CompatibilitySuppressions.xml b/src/Box3D.NET.Native/CompatibilitySuppressions.xml
index c65ffc3..e890cb4 100644
--- a/src/Box3D.NET.Native/CompatibilitySuppressions.xml
+++ b/src/Box3D.NET.Native/CompatibilitySuppressions.xml
@@ -1,6 +1,48 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- https://learn.microsoft.com/dotnet/fundamentals/package-validation/diagnostic-ids -->
 <Suppressions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Box3D.Native.b3TreeNodeChildren</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Box3D.Native.b3TreeNodeFlags</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Box3D.Native.b3TreeNodeFlagsStorage</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Box3D.Native.b3TreeNodeChildren</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Box3D.Native.b3TreeNodeFlags</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Box3D.Native.b3TreeNodeFlagsStorage</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0001</DiagnosticId>
     <Target>T:Box3D.Native.b3TreeNodeChildren</Target>
@@ -22,6 +64,286 @@
     <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
     <IsBaselineSuppression>true</IsBaselineSuppression>
   </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3Counters.byteCount</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3DynamicTree.freeList</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3DynamicTree.nodeCount</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3DynamicTree.root</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HeightFieldData.clockwise</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HeightFieldData.hash</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HullData.hash</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HullData.padding</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3MeshData.hash</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3Profile.applyRestitution</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.categoryBits</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.children</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.flags</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.height</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.next</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.parent</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.userData</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Box3D.Native.B3.b3DynamicTree_ValidateNoEnlarged(Box3D.Native.b3DynamicTree*)</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Box3D.Native.B3.b3GetByteCount</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Box3D.Native.B3.b3SetAllocator(,)</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3Counters.byteCount</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3DynamicTree.freeList</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3DynamicTree.nodeCount</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3DynamicTree.root</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HeightFieldData.clockwise</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HeightFieldData.hash</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HullData.hash</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3HullData.padding</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3MeshData.hash</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3Profile.applyRestitution</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.categoryBits</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.children</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.flags</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.height</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.next</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.parent</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>F:Box3D.Native.b3TreeNode.userData</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Box3D.Native.B3.b3DynamicTree_ValidateNoEnlarged(Box3D.Native.b3DynamicTree*)</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Box3D.Native.B3.b3GetByteCount</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0002</DiagnosticId>
+    <Target>M:Box3D.Native.B3.b3SetAllocator(,)</Target>
+    <Left>lib/net10.0-ios26.0/Box3D.NET.Native.dll</Left>
+    <Right>lib/net8.0/Box3D.NET.Native.dll</Right>
+    <IsBaselineSuppression>true</IsBaselineSuppression>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0002</DiagnosticId>
     <Target>F:Box3D.Native.b3Counters.byteCount</Target>