diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleCatalog.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleCatalog.cs
index 28ba862a4..ded23272f 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleCatalog.cs
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleCatalog.cs
@@ -12,9 +12,21 @@
 
 namespace MorganStanley.ComposeUI.ModuleLoader;
 
+/// <summary>
+/// Represents a collection of modules that can be started in the scope of the application.
+/// </summary>
 public interface IModuleCatalog
 {
+    /// <summary>
+    /// Gets a module's manifest by its module ID.
+    /// </summary>
+    /// <param name="moduleId"></param>
+    /// <returns></returns>
     IModuleManifest GetManifest(string moduleId);
 
+    /// <summary>
+    /// Gets the IDs of the modules in the catalog.
+    /// </summary>
+    /// <returns></returns>
     IEnumerable<string> GetModuleIds();
 }
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleInstance.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleInstance.cs
new file mode 100644
index 000000000..2924f44f1
--- /dev/null
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleInstance.cs
@@ -0,0 +1,41 @@
+// Morgan Stanley makes this available to you under the Apache License,
+// Version 2.0 (the "License"). You may obtain a copy of the License at
+// 
+//      http://www.apache.org/licenses/LICENSE-2.0.
+// 
+// See the NOTICE file distributed with this work for additional information
+// regarding copyright ownership. Unless required by applicable law or agreed
+// to in writing, software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions
+// and limitations under the License.
+
+namespace MorganStanley.ComposeUI.ModuleLoader;
+
+/// <summary>
+/// Represents a running instance of a module.
+/// </summary>
+public interface IModuleInstance
+{
+    /// <summary>
+    /// Gets the unique ID of the module instance.
+    /// </summary>
+    Guid InstanceId { get; }
+
+    /// <summary>
+    /// Gets the manifest of the module.
+    /// </summary>
+    IModuleManifest Manifest { get; }
+
+    /// <summary>
+    /// Gets the original <see cref="StartRequest"/> that was used to start the module.
+    /// </summary>
+    StartRequest StartRequest { get; }
+
+    /// <summary>
+    /// Gets the properties of type <typeparamref name="T"/> attached to the module instance.
+    /// </summary>
+    /// <typeparam name="T">The type of the properties to get</typeparam>
+    /// <returns>The collection of properties of the specified type, in the order they were added to the <see cref="StartupContext"/></returns>
+    IEnumerable<T> GetProperties<T>();
+}
\ No newline at end of file
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleLoader.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleLoader.cs
index 91c97f4ba..66f879e2d 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleLoader.cs
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleLoader.cs
@@ -14,7 +14,7 @@ namespace MorganStanley.ComposeUI.ModuleLoader;
 
 public interface IModuleLoader
 {
-    void RequestStart(StartRequest startupRequest);
+    void RequestStart(StartRequest startRequest);
 
     void RequestStop(StopRequest stopRequest);
 
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleManifest.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleManifest.cs
index 63d041610..f3ad6ffea 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleManifest.cs
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/IModuleManifest.cs
@@ -10,6 +10,8 @@
 // or implied. See the License for the specific language governing permissions
 // and limitations under the License.
 
+using System.Diagnostics.CodeAnalysis;
+
 namespace MorganStanley.ComposeUI.ModuleLoader;
 
 public interface IModuleManifest
@@ -18,11 +20,36 @@ public interface IModuleManifest
 
     string Name { get; }
 
-    string StartupType { get; }
+    string ModuleType { get; }
 }
 
 public interface IModuleManifest<out TDetails> : IModuleManifest
 {
-    TDetails GetDetails();
+    TDetails Details { get; }
 }
 
+public static class ModuleManifestExtensions
+{
+    /// <summary>
+    /// Shorthand for querying a module manifest for a specific details type.
+    /// </summary>
+    /// <typeparam name="TDetails">The type of the details</typeparam>
+    /// <param name="manifest">The module manifest</param>
+    /// <param name="details">The variable receiving the details object when the operation succeeds (or <c>default</c> otherwise).</param>
+    /// <returns>
+    /// True, if <paramref name="manifest"/> implements <see cref="IModuleManifest{TDetails}"/>.
+    /// </returns>
+    public static bool TryGetDetails<TDetails>(this IModuleManifest manifest, [NotNullWhen(true)] out TDetails details)
+    {
+        if (manifest is IModuleManifest<TDetails> manifestDetails)
+        {
+            details = manifestDetails.Details!;
+
+            return true;
+        }
+
+        details = default!; 
+
+        return false;
+    }
+}
\ No newline at end of file
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/LifetimeEvent.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/LifetimeEvent.cs
index 08790c75d..a803034c1 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/LifetimeEvent.cs
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/LifetimeEvent.cs
@@ -14,68 +14,60 @@ namespace MorganStanley.ComposeUI.ModuleLoader;
 
 public abstract class LifetimeEvent
 {
-    protected LifetimeEvent(Guid instanceId)
+    protected LifetimeEvent(IModuleInstance instance)
     {
-        InstanceId = instanceId;
+        Instance = instance;
     }
 
-    public Guid InstanceId { get; }
-
+    public IModuleInstance Instance { get; }
     public abstract LifetimeEventType EventType { get; }
 
     public sealed class Starting : LifetimeEvent
     {
-        internal Starting(Guid instanceId)
-            : base(instanceId)
-        { }
+        public Starting(IModuleInstance instance) : base(instance)
+        {
+        }
 
         public override LifetimeEventType EventType => LifetimeEventType.Starting;
     }
 
     public sealed class Started : LifetimeEvent
     {
-        internal Started(Guid instanceId)
-            : base(instanceId)
-        { }
+        public Started(IModuleInstance instance) : base(instance)
+        {
+        }
 
         public override LifetimeEventType EventType => LifetimeEventType.Started;
     }
 
     public sealed class Stopping : LifetimeEvent
     {
-        internal Stopping(Guid instanceId)
-            : base(instanceId)
-        { }
+        public Stopping(IModuleInstance instance) : base(instance)
+        {
+        }
 
         public override LifetimeEventType EventType => LifetimeEventType.Stopping;
     }
 
     public sealed class Stopped : LifetimeEvent
     {
-        internal Stopped(Guid instanceId, bool isExpected = true)
-            : base(instanceId)
+        public Stopped(
+            IModuleInstance instance,
+            bool isExpected = true) : base(instance)
         {
             IsExpected = isExpected;
         }
 
         public override LifetimeEventType EventType => LifetimeEventType.Stopped;
 
-        public bool IsExpected { get; set; }
+        public bool IsExpected { get; }
     }
 }
 
-
-
-
-
-
-
-
-
 public enum LifetimeEventType
 {
     Starting,
     Started,
     Stopping,
     Stopped
-}
\ No newline at end of file
+}
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/ModuleType.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/ModuleType.cs
new file mode 100644
index 000000000..cc45ba965
--- /dev/null
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/ModuleType.cs
@@ -0,0 +1,22 @@
+// Morgan Stanley makes this available to you under the Apache License,
+// Version 2.0 (the "License"). You may obtain a copy of the License at
+// 
+//      http://www.apache.org/licenses/LICENSE-2.0.
+// 
+// See the NOTICE file distributed with this work for additional information
+// regarding copyright ownership. Unless required by applicable law or agreed
+// to in writing, software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions
+// and limitations under the License.
+
+namespace MorganStanley.ComposeUI.ModuleLoader;
+
+/// <summary>
+/// Contains the predefined module types.
+/// </summary>
+public static class ModuleType
+{
+    public const string Native = "native";
+    public const string Web = "web";
+}
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/MorganStanley.ComposeUI.ModuleLoader.Abstractions.csproj b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/MorganStanley.ComposeUI.ModuleLoader.Abstractions.csproj
index 7453cbdcd..d609e871c 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/MorganStanley.ComposeUI.ModuleLoader.Abstractions.csproj
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/MorganStanley.ComposeUI.ModuleLoader.Abstractions.csproj
@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StartRequest.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StartRequest.cs
index 2408f60fe..a4fb3da49 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StartRequest.cs
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StartRequest.cs
@@ -14,13 +14,15 @@ namespace MorganStanley.ComposeUI.ModuleLoader;
 
 public sealed class StartRequest
 {
-    public StartRequest(string moduleId)
+    public StartRequest(
+        string moduleId, 
+        IEnumerable<KeyValuePair<string, string>>? parameters = null)
     {
         ModuleId = moduleId;
-        InstanceId = Guid.NewGuid();
+        Parameters = parameters?.ToArray() ?? Array.Empty<KeyValuePair<string, string>>();
     }
 
-    public Guid InstanceId { get; }
-
     public string ModuleId { get; }
+
+    public KeyValuePair<string, string>[] Parameters { get; }
 }
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StopRequest.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StopRequest.cs
index a2faa08f3..e73b4e0c9 100644
--- a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StopRequest.cs
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/StopRequest.cs
@@ -12,7 +12,12 @@
 
 namespace MorganStanley.ComposeUI.ModuleLoader;
 
-public struct StopRequest
+public sealed class StopRequest
 {
-    public Guid InstanceId;
+    public StopRequest(Guid instanceId)
+    {
+        InstanceId = instanceId;
+    }
+
+    public Guid InstanceId { get; }
 }
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/WebManifestDetails.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/WebManifestDetails.cs
new file mode 100644
index 000000000..dfabef376
--- /dev/null
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/WebManifestDetails.cs
@@ -0,0 +1,32 @@
+// Morgan Stanley makes this available to you under the Apache License,
+// Version 2.0 (the "License"). You may obtain a copy of the License at
+// 
+//      http://www.apache.org/licenses/LICENSE-2.0.
+// 
+// See the NOTICE file distributed with this work for additional information
+// regarding copyright ownership. Unless required by applicable law or agreed
+// to in writing, software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions
+// and limitations under the License.
+
+namespace MorganStanley.ComposeUI.ModuleLoader;
+
+/// <summary>
+/// Contains the manifest details for web modules.
+/// </summary>
+/// <remarks>
+/// Web modules should have <see cref="ModuleType.Web"/> as their <see cref="IModuleManifest.ModuleType"/>
+/// </remarks>
+public sealed class WebManifestDetails
+{
+    /// <summary>
+    /// The URL to open when this module is started.
+    /// </summary>
+    public Uri Url { get; init; }
+
+    /// <summary>
+    /// The URL of the window icon, if any.
+    /// </summary>
+    public Uri? IconUrl { get; init; }
+}
diff --git a/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/WebStartupProperties.cs b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/WebStartupProperties.cs
new file mode 100644
index 000000000..3b724d6c7
--- /dev/null
+++ b/src/module-loader/dotnet/src/MorganStanley.ComposeUI.ModuleLoader.Abstractions/WebStartupProperties.cs
@@ -0,0 +1,23 @@
+// Morgan Stanley makes this available to you under the Apache License,
+// Version 2.0 (the "License"). You may obtain a copy of the License at
+// 
+//      http://www.apache.org/licenses/LICENSE-2.0.
+// 
+// See the NOTICE file distributed with this work for additional information
+// regarding copyright ownership. Unless required by applicable law or agreed
+// to in writing, software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
+// or implied. See the License for the specific language governing permissions
+// and limitations under the License.
+
+namespace MorganStanley.ComposeUI.ModuleLoader;
+
+/// <summary>
+/// Contains the necessary properties to start a web module.
+/// This type is injected to <see cref="StartupContext"/>.
+/// </summary>
+public sealed class WebStartupProperties
+{
+    public Uri Url { get; set; }
+    public Uri? IconUrl { get; set; }
+}
\ No newline at end of file