diff --git a/ZB.MOM.WW.OtOpcUa.slnx b/ZB.MOM.WW.OtOpcUa.slnx
index 49a09fd..d43c521 100644
--- a/ZB.MOM.WW.OtOpcUa.slnx
+++ b/ZB.MOM.WW.OtOpcUa.slnx
@@ -2,6 +2,8 @@
   <Folder Name="/src/" />
   <Folder Name="/src/Core/">
     <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Core.Abstractions/ZB.MOM.WW.OtOpcUa.Core.Abstractions.csproj" />
+    <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Cluster/ZB.MOM.WW.OtOpcUa.Cluster.csproj" />
+    <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Commons/ZB.MOM.WW.OtOpcUa.Commons.csproj" />
     <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Configuration/ZB.MOM.WW.OtOpcUa.Configuration.csproj" />
     <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Core/ZB.MOM.WW.OtOpcUa.Core.csproj" />
     <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Core.Scripting/ZB.MOM.WW.OtOpcUa.Core.Scripting.csproj" />
@@ -10,6 +12,12 @@
     <Project Path="src/Core/ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian/ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian.csproj" />
   </Folder>
   <Folder Name="/src/Server/">
+    <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj" />
+    <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.ControlPlane/ZB.MOM.WW.OtOpcUa.ControlPlane.csproj" />
+    <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.Host/ZB.MOM.WW.OtOpcUa.Host.csproj" />
+    <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/ZB.MOM.WW.OtOpcUa.OpcUaServer.csproj" />
+    <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ZB.MOM.WW.OtOpcUa.Runtime.csproj" />
+    <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.Security/ZB.MOM.WW.OtOpcUa.Security.csproj" />
     <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.Server/ZB.MOM.WW.OtOpcUa.Server.csproj" />
     <Project Path="src/Server/ZB.MOM.WW.OtOpcUa.Admin/ZB.MOM.WW.OtOpcUa.Admin.csproj" />
   </Folder>
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Cluster/ZB.MOM.WW.OtOpcUa.Cluster.csproj b/src/Core/ZB.MOM.WW.OtOpcUa.Cluster/ZB.MOM.WW.OtOpcUa.Cluster.csproj
new file mode 100644
index 0000000..942f1bd
--- /dev/null
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Cluster/ZB.MOM.WW.OtOpcUa.Cluster.csproj
@@ -0,0 +1,28 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.Cluster</RootNamespace>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Akka.Hosting"/>
+        <PackageReference Include="Akka.Cluster"/>
+        <PackageReference Include="Akka.Cluster.Hosting"/>
+        <PackageReference Include="Akka.Cluster.Tools"/>
+        <PackageReference Include="Akka.Remote.Hosting"/>
+        <PackageReference Include="Microsoft.Extensions.Hosting"/>
+        <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <!-- OpenTelemetry.Api 1.9.0 reaches this project transitively from Akka.Cluster.Hosting.
+             Bump arrives when Akka updates its OTel dependency; tracked separately. -->
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-g94r-2vxg-569j"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Interfaces/.gitkeep b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Interfaces/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Messages/.gitkeep b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Messages/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Types/.gitkeep b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/Types/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/src/Core/ZB.MOM.WW.OtOpcUa.Commons/ZB.MOM.WW.OtOpcUa.Commons.csproj b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/ZB.MOM.WW.OtOpcUa.Commons.csproj
new file mode 100644
index 0000000..e92789a
--- /dev/null
+++ b/src/Core/ZB.MOM.WW.OtOpcUa.Commons/ZB.MOM.WW.OtOpcUa.Commons.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.Commons</RootNamespace>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Akka"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj
new file mode 100644
index 0000000..d2d8acf
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/ZB.MOM.WW.OtOpcUa.AdminUI.csproj
@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk.Razor">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.AdminUI</RootNamespace>
+        <AddRazorSupportForMvc>true</AddRazorSupportForMvc>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <FrameworkReference Include="Microsoft.AspNetCore.App"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Security\ZB.MOM.WW.OtOpcUa.Security.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.ControlPlane\ZB.MOM.WW.OtOpcUa.ControlPlane.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <!-- OpenTelemetry.Api transitively via ControlPlane -> Akka.Cluster.Tools. -->
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-g94r-2vxg-569j"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.ControlPlane/ZB.MOM.WW.OtOpcUa.ControlPlane.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.ControlPlane/ZB.MOM.WW.OtOpcUa.ControlPlane.csproj
new file mode 100644
index 0000000..2ec6399
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.ControlPlane/ZB.MOM.WW.OtOpcUa.ControlPlane.csproj
@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.ControlPlane</RootNamespace>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <FrameworkReference Include="Microsoft.AspNetCore.App"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Akka.Hosting"/>
+        <PackageReference Include="Akka.Cluster.Tools"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Cluster\ZB.MOM.WW.OtOpcUa.Cluster.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <!-- OpenTelemetry.Api 1.9.0 reaches this project transitively from Akka.Cluster.Tools.
+             Mirrors the suppression on the Cluster project. -->
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-g94r-2vxg-569j"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
new file mode 100644
index 0000000..404d207
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Program.cs
@@ -0,0 +1,4 @@
+var builder = WebApplication.CreateBuilder(args);
+var app = builder.Build();
+app.MapGet("/", () => "OtOpcUa.Host scaffold");
+await app.RunAsync();
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/Properties/launchSettings.json b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Properties/launchSettings.json
new file mode 100644
index 0000000..0af0ed7
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/Properties/launchSettings.json
@@ -0,0 +1,13 @@
+{
+  "profiles": {
+    "OtOpcUa.Host": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": false,
+      "applicationUrl": "http://localhost:9000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/ZB.MOM.WW.OtOpcUa.Host.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.Host/ZB.MOM.WW.OtOpcUa.Host.csproj
new file mode 100644
index 0000000..f251e81
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/ZB.MOM.WW.OtOpcUa.Host.csproj
@@ -0,0 +1,33 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.Host</RootNamespace>
+        <AssemblyName>OtOpcUa.Host</AssemblyName>
+        <UserSecretsId>zb-mom-ww-otopcua-host</UserSecretsId>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Akka.Hosting"/>
+        <PackageReference Include="Serilog.AspNetCore"/>
+        <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Condition="$([MSBuild]::IsOSPlatform('Windows'))"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Cluster\ZB.MOM.WW.OtOpcUa.Cluster.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Security\ZB.MOM.WW.OtOpcUa.Security.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.ControlPlane\ZB.MOM.WW.OtOpcUa.ControlPlane.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.Runtime\ZB.MOM.WW.OtOpcUa.Runtime.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.OpcUaServer\ZB.MOM.WW.OtOpcUa.OpcUaServer.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.AdminUI\ZB.MOM.WW.OtOpcUa.AdminUI.csproj"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <!-- OpenTelemetry.Api transitively via Akka; Opc.Ua.Core transitively via OpcUaServer. -->
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-g94r-2vxg-569j"/>
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-h958-fxgg-g7w3"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Host/appsettings.json b/src/Server/ZB.MOM.WW.OtOpcUa.Host/appsettings.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Host/appsettings.json
@@ -0,0 +1 @@
+{}
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/ZB.MOM.WW.OtOpcUa.OpcUaServer.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/ZB.MOM.WW.OtOpcUa.OpcUaServer.csproj
new file mode 100644
index 0000000..bece604
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/ZB.MOM.WW.OtOpcUa.OpcUaServer.csproj
@@ -0,0 +1,29 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.OpcUaServer</RootNamespace>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="OPCFoundation.NetStandard.Opc.Ua.Server"/>
+        <!-- Pin Opc.Ua.Configuration to 1.5.374.126 so the transitive Opc.Ua.Core matches what
+             Opc.Ua.Server is built against. The central pin (1.5.378.106) is required by
+             Driver.OpcUaClient; mixing transitive Opc.Ua.Core breaks CustomNodeManager2 overrides.
+             Bumps to 1.5.378.106 when Opc.Ua.Server publishes a matching release. -->
+        <PackageReference Include="OPCFoundation.NetStandard.Opc.Ua.Configuration" VersionOverride="1.5.374.126"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-37gx-xxp4-5rgx"/>
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-w3x6-4m5h-cxqf"/>
+        <!-- OPCFoundation.NetStandard.Opc.Ua.Core advisory — accepted at v1, carried into v2. -->
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-h958-fxgg-g7w3"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ZB.MOM.WW.OtOpcUa.Runtime.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ZB.MOM.WW.OtOpcUa.Runtime.csproj
new file mode 100644
index 0000000..2e4ca60
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/ZB.MOM.WW.OtOpcUa.Runtime.csproj
@@ -0,0 +1,36 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.Runtime</RootNamespace>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Akka.Hosting"/>
+        <PackageReference Include="Akka.Cluster.Tools"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Cluster\ZB.MOM.WW.OtOpcUa.Cluster.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+        <ProjectReference Include="..\ZB.MOM.WW.OtOpcUa.OpcUaServer\ZB.MOM.WW.OtOpcUa.OpcUaServer.csproj"/>
+        <!--
+            Concrete OtOpcUa.Driver.* assemblies are loaded reflectively at runtime (Phase 6,
+            Task 41+) and intentionally NOT project-referenced here. The driver contracts live in
+            ZB.MOM.WW.OtOpcUa.Core.Abstractions, which Runtime picks up transitively through
+            ZB.MOM.WW.OtOpcUa.Configuration. Adding a direct reference would create a build-time
+            coupling and force every concrete driver to compile into Runtime's output, defeating
+            the reflective-load design.
+        -->
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Core.Abstractions\ZB.MOM.WW.OtOpcUa.Core.Abstractions.csproj"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <!-- OpenTelemetry.Api transitively via Akka; Opc.Ua.Core transitively via OpcUaServer
+             (Opc.Ua.Server 1.5.374.126). Both advisories already accepted at the legacy Server. -->
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-g94r-2vxg-569j"/>
+        <NuGetAuditSuppress Include="https://github.com/advisories/GHSA-h958-fxgg-g7w3"/>
+    </ItemGroup>
+
+</Project>
diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Security/ZB.MOM.WW.OtOpcUa.Security.csproj b/src/Server/ZB.MOM.WW.OtOpcUa.Security/ZB.MOM.WW.OtOpcUa.Security.csproj
new file mode 100644
index 0000000..184e71b
--- /dev/null
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Security/ZB.MOM.WW.OtOpcUa.Security.csproj
@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.Security</RootNamespace>
+        <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <FrameworkReference Include="Microsoft.AspNetCore.App"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer"/>
+        <PackageReference Include="Microsoft.IdentityModel.Tokens"/>
+        <PackageReference Include="System.IdentityModel.Tokens.Jwt"/>
+        <PackageReference Include="Novell.Directory.Ldap.NETStandard"/>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj"/>
+        <ProjectReference Include="..\..\Core\ZB.MOM.WW.OtOpcUa.Configuration\ZB.MOM.WW.OtOpcUa.Configuration.csproj"/>
+    </ItemGroup>
+
+</Project>