diff --git a/scripts/validation/opcua-lifecycle-memory/ArtifactModuleInfo.cs b/scripts/validation/opcua-lifecycle-memory/ArtifactModuleInfo.cs
new file mode 100644
index 00000000..3a74f054
--- /dev/null
+++ b/scripts/validation/opcua-lifecycle-memory/ArtifactModuleInfo.cs
@@ -0,0 +1,26 @@
+// Read-only managed metadata extraction; does not load or execute product assemblies.
+using System.Reflection.Metadata;
+using System.Reflection.PortableExecutable;
+using System.Text.Json;
+var root = Path.GetFullPath(args[0]);
+var modules = new List<object>();
+foreach (var directory in args.Skip(1))
+{
+    foreach (var path in Directory.EnumerateFiles(directory, "*.dll", SearchOption.AllDirectories).Order())
+    {
+        try
+        {
+            using var file = File.OpenRead(path);
+            using var pe = new PEReader(file);
+            if (!pe.HasMetadata) continue;
+            var metadata = pe.GetMetadataReader();
+            if (!metadata.IsAssembly) continue;
+            var assembly = metadata.GetAssemblyDefinition();
+            modules.Add(new { file = Path.GetRelativePath(root, path).Replace(Path.DirectorySeparatorChar, '/'),
+                assembly = metadata.GetString(assembly.Name), version = assembly.Version.ToString(),
+                mvid = metadata.GetGuid(metadata.GetModuleDefinition().Mvid).ToString("D") });
+        }
+        catch (BadImageFormatException) { /* Native DLLs have no CLR module identity. */ }
+    }
+}
+Console.WriteLine(JsonSerializer.Serialize(modules));
diff --git a/scripts/validation/opcua-lifecycle-memory/SATURATION.md b/scripts/validation/opcua-lifecycle-memory/SATURATION.md
index 9c2af2bd..cbbbaabf 100644
--- a/scripts/validation/opcua-lifecycle-memory/SATURATION.md
+++ b/scripts/validation/opcua-lifecycle-memory/SATURATION.md
@@ -79,6 +79,9 @@ publishes fresh, separate app/observer artifacts for `linux-arm64`, self-contain
 .NET **10.0.14**, without trimming or single-file publishing. It never starts the
 experiment. The bundle records source revision, source hashes, exact publish
 command, fixed protocol, image digest and SHA-256 of every app/observer/tool file.
+It requires the landed HistorianGateway Client/Contracts 1.0.0 dependency graph
+and records assembly versions/module MVIDs by reading PE metadata without loading
+or executing product assemblies.
 
 ```bash
 python3 scripts/validation/opcua-lifecycle-memory/prepare_saturation.py \
diff --git a/scripts/validation/opcua-lifecycle-memory/prepare_saturation.py b/scripts/validation/opcua-lifecycle-memory/prepare_saturation.py
index bb8a907a..979642bd 100644
--- a/scripts/validation/opcua-lifecycle-memory/prepare_saturation.py
+++ b/scripts/validation/opcua-lifecycle-memory/prepare_saturation.py
@@ -49,12 +49,28 @@ def main():
         if not included or any(value["version"] != "10.0.14" for value in included):
             raise RuntimeError("Published participant is not the prospectively fixed self-contained runtime")
     dependencies = json.loads((root / "app/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests.deps.json").read_text())["libraries"]
+    gateway_libraries = [name for name in dependencies if name.startswith("ZB.MOM.WW.HistorianGateway.")]
+    if not gateway_libraries or any(name.rsplit("/", 1)[-1] != "1.0.0" for name in gateway_libraries):
+        raise RuntimeError("The reviewed candidate requires the landed HistorianGateway 1.0.0 graph")
+    metadata = root / "module-info-build"
+    metadata.mkdir()
+    (metadata / "module-info.csproj").write_text(
+        '<Project Sdk="Microsoft.NET.Sdk"><PropertyGroup><OutputType>Exe</OutputType>'
+        '<TargetFramework>net10.0</TargetFramework><ImplicitUsings>enable</ImplicitUsings>'
+        '<EnableDefaultCompileItems>false</EnableDefaultCompileItems></PropertyGroup>'
+        '<ItemGroup><Compile Include="' + str(source / "ArtifactModuleInfo.cs") + '" /></ItemGroup></Project>')
+    with (metadata / "build.log").open("w") as log:
+        subprocess.run(["dotnet", "build", str(metadata / "module-info.csproj"), "-c", "Release", "-m:2"],
+                       stdout=log, stderr=subprocess.STDOUT, check=True)
+    modules = json.loads(subprocess.check_output(["dotnet", str(metadata / "bin/Release/net10.0/module-info.dll"),
+                                                 str(root), str(root / "app"), str(root / "observer")], text=True))
     receipt = {"protocol": "sdk2-saturation-v1", "sourceRevision": revision, "image": options.image,
                "rid": "linux-arm64", "runtimeVersion": "10.0.14", "selfContained": True,
                "canonicalCycles": 384, "completedRestarts": 96, "settlingCycles": 1, "maximumPhaseSeconds": 1800,
                "windows": [[321, 352], [353, 384]], "observerBufferMiB": 16, "runtimeKeywords": "0x18", "rundown": False,
                "acceptance": False, "preparedUtc": datetime.now(timezone.utc).isoformat(), "publishCommand": command,
                "sdkLibraries": [name for name in dependencies if name.startswith("OPCFoundation.")],
+               "gatewayLibraries": gateway_libraries, "managedModules": modules,
                "testSourceSha256": sha(project.parent / "Sdk2LifecycleSoakTests.cs"),
                "observerSourceSha256": sha(source / "SaturationObserver.cs"), "files": manifest}
     receipt_path = root / "receipt.json"