fix: switch to text response format in Claude thinking patch

Author: devversion

runner/codegen/ai-sdk-claude-thinking-patch.ts

@@ -20,7 +20,7 @@ export const anthropicThinkingWithStructuredResponseMiddleware: LanguageModelV2M
         },
       ];
       params.toolChoice = {type: 'auto'};
-
+      params.responseFormat = {type: 'text'};
       params.prompt.push({
         role: 'user',
         content: [
@@ -33,4 +33,16 @@ export const anthropicThinkingWithStructuredResponseMiddleware: LanguageModelV2M
     }
     return Promise.resolve(params);
   },
+  wrapGenerate: async ({doGenerate}) => {
+    const result = await doGenerate();
+
+    // Extract the JSON tool call (conforming to the schema) and return it as text response.
+    for (const r of result.content) {
+      if (r.type === 'tool-call' && r.toolName === 'json') {
+        result.content.push({type: 'text', text: r.input});
+      }
+    }
+
+    return result;
+  },
 };