diff --git a/src/GameCult.Geometry/CultGeometryDocuments.cs b/src/GameCult.Geometry/CultGeometryDocuments.cs
index 7a1677b3..306b5849 100644
--- a/src/GameCult.Geometry/CultGeometryDocuments.cs
+++ b/src/GameCult.Geometry/CultGeometryDocuments.cs
@@ -411,7 +411,13 @@ namespace GameCult.Geometry
 
         public static string StableVector(float[] values)
         {
-            return string.Join(",", values.Select(value => value.ToString("R", CultureInfo.InvariantCulture)));
+            return string.Join(",", values.Select(StableFloat));
+        }
+
+        public static string StableFloat(float value)
+        {
+            return BitConverter.ToUInt32(BitConverter.GetBytes(value), 0)
+                .ToString("x8", CultureInfo.InvariantCulture);
         }
 
         public static string StableArray(string[] values)
diff --git a/tests/GameCult.Geometry.Tests/Fixtures/vg-csg-ragnarok/ragnarok-domain.msgpack b/tests/GameCult.Geometry.Tests/Fixtures/vg-csg-ragnarok/ragnarok-domain.msgpack
new file mode 100644
index 00000000..79c5f5b6
Binary files /dev/null and b/tests/GameCult.Geometry.Tests/Fixtures/vg-csg-ragnarok/ragnarok-domain.msgpack differ
diff --git a/tests/GameCult.Geometry.Tests/Fixtures/vg-csg-ragnarok/ragnarok-first-chunk.msgpack b/tests/GameCult.Geometry.Tests/Fixtures/vg-csg-ragnarok/ragnarok-first-chunk.msgpack
new file mode 100644
index 00000000..4cfcf493
Binary files /dev/null and b/tests/GameCult.Geometry.Tests/Fixtures/vg-csg-ragnarok/ragnarok-first-chunk.msgpack differ
diff --git a/tests/GameCult.Geometry.Tests/GameCult.Geometry.Tests.csproj b/tests/GameCult.Geometry.Tests/GameCult.Geometry.Tests.csproj
index fe7fd8c1..407f5305 100644
--- a/tests/GameCult.Geometry.Tests/GameCult.Geometry.Tests.csproj
+++ b/tests/GameCult.Geometry.Tests/GameCult.Geometry.Tests.csproj
@@ -12,6 +12,10 @@
     <ProjectReference Include="..\..\src\GameCult.Networking\GameCult.Networking.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Include="Fixtures\vg-csg-ragnarok\*.msgpack" CopyToOutputDirectory="PreserveNewest" />
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="NUnit" Version="4.*" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />
diff --git a/tests/GameCult.Geometry.Tests/GeometryDocumentTests.cs b/tests/GameCult.Geometry.Tests/GeometryDocumentTests.cs
index e3938284..1723b852 100644
--- a/tests/GameCult.Geometry.Tests/GeometryDocumentTests.cs
+++ b/tests/GameCult.Geometry.Tests/GeometryDocumentTests.cs
@@ -82,15 +82,41 @@ namespace GameCult.Geometry.Tests
 
             claim.StableFingerprint().Should().Be(string.Join('\u001e',
                 "column-support-shell",
-                "0,0,0",
-                "0,0,0,1",
-                "0,0,45",
-                "18,18,96",
+                "00000000,00000000,00000000",
+                "00000000,00000000,00000000,3f800000",
+                "00000000,00000000,42340000",
+                "41900000,41900000,42c00000",
                 "SupportShell",
                 "10",
                 "RenderAndCollider"));
         }
 
+        [Test]
+        public void RustExportedDomainDocument_DecodesWithStableCultCacheKey()
+        {
+            var payload = File.ReadAllBytes(FixturePath("ragnarok-domain.msgpack"));
+            var domain = CultDocumentMessagePackSerialization.Deserialize<CultGeometryDomainDocument>(payload);
+
+            domain.DomainId.Should().Be("ragnarok-column");
+            domain.Root.Children.Should().NotBeEmpty();
+            domain.Root.Children[0].Name.Should().Be("stellarator-column-00");
+            CultGeometryDomainDocument.CreateRecordKey(domain).Value
+                .Should().Be("geometry:domain:02c9b5810977406b0c206f3a3494327a423abb9448192be1b9a1863cd0f2ed95");
+        }
+
+        [Test]
+        public void RustExportedChunkArtifact_DecodesWithStableCultCacheKey()
+        {
+            var payload = File.ReadAllBytes(FixturePath("ragnarok-first-chunk.msgpack"));
+            var chunk = CultDocumentMessagePackSerialization.Deserialize<CultGeometryChunkArtifact>(payload);
+
+            chunk.ChunkId.Should().StartWith("chunk/");
+            chunk.RenderMesh.TriangleCount.Should().BeGreaterThan(0);
+            chunk.SourceDomainKeys.Should().NotBeEmpty();
+            CultGeometryChunkArtifact.CreateRecordKey(chunk).Value
+                .Should().Be("geometry:chunk:b94dcd7d6776df15d0fa5fcf7f4b24f1384876b13b2d38cc57c4468136521af5");
+        }
+
         [Test]
         public async Task ChunkArtifact_Replicates_ThroughCultNetRawDocumentLane()
         {
@@ -273,6 +299,15 @@ namespace GameCult.Geometry.Tests
             };
         }
 
+        private static string FixturePath(string fileName)
+        {
+            return Path.Combine(
+                TestContext.CurrentContext.TestDirectory,
+                "Fixtures",
+                "vg-csg-ragnarok",
+                fileName);
+        }
+
         private static CultGeometryChunkArtifact SampleChunk()
         {
             return new CultGeometryChunkArtifact