Make sure that type headers are only written once.

src/HotChocolate/Core/src/Types.Analyzers/TypeModuleGenerator.cs

@@ -175,7 +175,8 @@ private static void WriteConfiguration(
 
                 case ObjectTypeExtensionInfo objectTypeExtension:
                     if ((module.Options & ModuleOptions.RegisterTypes) ==
-                        ModuleOptions.RegisterTypes)
+                        ModuleOptions.RegisterTypes &&
+                        objectTypeExtension.Diagnostics.Length == 0)
                     {
                         generator.WriteRegisterObjectTypeExtension(
                             objectTypeExtension.RuntimeType.ToFullyQualified(),

src/HotChocolate/Core/src/Types.Analyzers/TypesGenerator.cs

@@ -13,7 +13,6 @@ public class TypesGenerator : IIncrementalGenerator
 {
     private static readonly ISyntaxInspector[] _inspectors =
     [
-        new ModuleInspector(),
         new ObjectTypeExtensionInfoInspector(),
     ];
 
@@ -68,41 +67,41 @@ private static void Execute(
             return;
         }
 
-        var module = syntaxInfos.GetModuleInfo(compilation.AssemblyName, out var defaultModule);
-
-        // if there is only the module info we do not need to generate a module.
-        if (!defaultModule && syntaxInfos.Length == 1)
-        {
-            return;
-        }
-
         var sb = StringBuilderPool.Get();
+        var first = true;
 
         foreach (var syntaxInfo in syntaxInfos)
         {
-            if (syntaxInfo is ObjectTypeExtensionInfo objectTypeExtension)
+            if (syntaxInfo is not ObjectTypeExtensionInfo objectTypeExtension)
             {
-                if (objectTypeExtension.Diagnostics.Length > 0)
+                continue;
+            }
+
+            if (objectTypeExtension.Diagnostics.Length > 0)
+            {
+                foreach (var diagnostic in objectTypeExtension.Diagnostics)
                 {
-                    foreach (var diagnostic in objectTypeExtension.Diagnostics)
-                    {
-                        context.ReportDiagnostic(diagnostic);
-                    }
-                    continue;
+                    context.ReportDiagnostic(diagnostic);
                 }
+                continue;
+            }
 
-                var generator = new ObjectTypeExtensionSyntaxGenerator(
-                    sb,
-                    objectTypeExtension.Type.ContainingNamespace.ToDisplayString());
+            var generator = new ObjectTypeExtensionSyntaxGenerator(
+                sb,
+                objectTypeExtension.Type.ContainingNamespace.ToDisplayString());
 
+            if (first)
+            {
                 generator.WriterHeader();
-                generator.WriteBeginNamespace();
-                generator.WriteBeginClass(objectTypeExtension.Type.Name);
-                generator.WriteInitializeMethod(objectTypeExtension);
-                generator.WriteConfigureMethod(objectTypeExtension);
-                generator.WriteEndClass();
-                generator.WriteEndNamespace();
+                first = false;
             }
+
+            generator.WriteBeginNamespace();
+            generator.WriteBeginClass(objectTypeExtension.Type.Name);
+            generator.WriteInitializeMethod(objectTypeExtension);
+            generator.WriteConfigureMethod(objectTypeExtension);
+            generator.WriteEndClass();
+            generator.WriteEndNamespace();
         }
 
         context.AddSource(WellKnownFileNames.TypesFile, sb.ToString());

src/HotChocolate/Core/test/Types.Analyzers.Tests/BookType.cs

@@ -11,4 +11,17 @@ protected override void Configure(IObjectTypeDescriptor<Book> descriptor)
 public class Book
 {
     public string? Title { get; set; }
+
+    public Author? Author => null;
+}
+
+public class Author
+{
+    public string Name { get; set; } = default!;
+}
+
+[ObjectType<Author>]
+public static partial class AuthorNode
+{
+    public static string Address([Parent] Author author) => "something";
 }

src/HotChocolate/Core/test/Types.Analyzers.Tests/__snapshots__/SchemaTests.SchemaSnapshot.md

@@ -16,6 +16,11 @@ interface Node {
   id: ID!
 }
 
+type Author {
+  address: String!
+  name: String!
+}
+
 type Mutation {
   bar: String!
   doSomething: String!
@@ -44,6 +49,7 @@ type Query {
 
 type SomeBook {
   title: String
+  author: Author
 }
 
 type Subscription {

src/HotChocolate/Language/src/Language/HotChocolate.Language.csproj

@@ -11,12 +11,6 @@
     <Description>Contains the Hot Chocolate GraphQL parser and lexer. Also included are syntax visitor and syntax rewriter base classes.</Description>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Compile Remove="AST\**" />
-    <EmbeddedResource Remove="AST\**" />
-    <None Remove="AST\**" />
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\Language.SyntaxTree\HotChocolate.Language.SyntaxTree.csproj" />
     <ProjectReference Include="..\Language.Utf8\HotChocolate.Language.Utf8.csproj" />