[Strawberry Shake] Fix @rename directive on input type fields

src/StrawberryShake/CodeGeneration/src/CodeGeneration/Utilities/SchemaHelper.cs

@@ -46,6 +46,15 @@ public static Schema Load(
                     leafTypes,
                     typeInfos);
 
+                // Forward input object extensions to the schema builder
+                var inputExtensions = document.Definitions
+                    .OfType<InputObjectTypeExtensionNode>()
+                    .ToList();
+                if (inputExtensions.Count > 0)
+                {
+                    builder.AddDocument(new DocumentNode(inputExtensions));
+                }
+
                 if (!noStore)
                 {
                     CollectGlobalEntityPatterns(
@@ -77,13 +86,23 @@ public static Schema Load(
                     }
                 }
 
-                builder.AddDocument(document);
+                // Filter out @rename directive declaration to prevent a duplicate-type
+                // error when the user's schema already declares it. We always register
+                // RenameDirectiveType programmatically so its C# binding is correct.
+                var definitions = document.Definitions
+                    .Where(d => !(d is DirectiveDefinitionNode dd && dd.Name.Value == "rename"))
+                    .ToList();
+                var docToAdd = definitions.Count == document.Definitions.Count
+                    ? document
+                    : new DocumentNode(definitions);
+                builder.AddDocument(docToAdd);
             }
         }
 
         AddDefaultScalarInfos(builder, leafTypes);
 
         return builder
+            .AddDirectiveType<RenameDirectiveType>()
             .ModifyOptions(
                 o =>
                 {

src/StrawberryShake/CodeGeneration/test/CodeGeneration.CSharp.Tests/InputGeneratorTests.cs

@@ -267,4 +267,20 @@ scalar Upload
                 ",
             "extend schema @key(fields: \"id\")");
     }
+
+    [Fact]
+    public void Input_Field_Renamed_Via_Extension_Has_CSharp_Property_Name_With_Original_Wire_Key()
+    {
+        AssertResult(
+            """mutation SetFoo($input: FooInput!) { setFoo(input: $input) }""",
+            """
+            type Query { noop: String }
+            type Mutation { setFoo(input: FooInput!): Boolean }
+            input FooInput { value: String }
+            """,
+            """
+            extend schema @key(fields: "id")
+            extend input FooInput { equals: String @rename(name: "EqualsValue") }
+            """);
+    }
 }

src/StrawberryShake/CodeGeneration/test/CodeGeneration.CSharp.Tests/SchemaGeneratorTests.cs

@@ -609,4 +609,19 @@ query GetField1 {
             }
             """);
     }
+
+    [Fact]
+    public void Enum_Value_With_Rename_Has_Renamed_CSharp_Member_And_Original_Wire_Value()
+    {
+        AssertResult(
+            """query GetStatus { status }""",
+            """
+            type Query { status: Status! }
+            enum Status {
+                ACTIVE   @rename(name: "Active")
+                INACTIVE @rename(name: "Inactive")
+            }
+            directive @rename(name: String!) on INPUT_FIELD_DEFINITION | INPUT_OBJECT | ENUM | ENUM_VALUE
+            """);
+    }
 }