OpenAPI: Fix root schema manipulation with TypeScript definition generation

.changeset/witty-steaks-chew.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-openapi': patch
+---
+
+Fix root schema manipulation with TypeScript definition generation

packages/openapi/src/playground/index.tsx

@@ -125,11 +125,6 @@ function writeReferences(
         for (const key in output[name]) {
           output[name][key] = writeReferences(output[name][key], ctx, stack);
         }
-        continue;
-      default:
-        if (typeof output[name] === 'object' && !Array.isArray(output[name])) {
-          output[name] = { ...output[name] };
-        }
     }
   }
 

packages/openapi/src/utils/get-typescript-schema.ts

@@ -5,19 +5,12 @@ export async function getTypescriptSchema(
   schema: object,
   dereferenceMap: DereferenceMap,
 ): Promise<string | undefined> {
-  return compile(
-    // re-running on the same schema results in error
-    // because it uses `defineProperty` to define internal references
-    // we clone the schema to fix this problem
-    schema,
-    'Response',
-    {
-      $refOptions: false,
-      schemaToId: dereferenceMap,
-      bannerComment: '',
-      additionalProperties: false,
-      format: true,
-      enableConstEnums: false,
-    },
-  );
+  const cloned = structuredClone({ schema, dereferenceMap });
+  return compile(cloned.schema, 'Response', {
+    $refOptions: false,
+    schemaToId: cloned.dereferenceMap,
+    bannerComment: '',
+    additionalProperties: false,
+    enableConstEnums: false,
+  });
 }