fix: unblock local news page generation

session-reply-wait.test.mjs

@@ -76,6 +76,38 @@ test('consumeSessionEventsUntilFinish records a successful raster generate_image
   assert.equal(result.toolEvidence.generateImage.jobId, 'job-1');
 });
 
+test('consumeSessionEventsUntilFinish surfaces reasoning_content protocol errors before Finish', async () => {
+  const frames = [
+    `data: ${JSON.stringify({
+      type: 'Message',
+      request_id: 'req-1',
+      message: {
+        role: 'assistant',
+        content: [{
+          type: 'text',
+          text: 'Ran into this error: Bad request (400): The reasoning_content in the thinking mode must be passed back to the API.\n\nPlease retry if you think this is a transient or recoverable error.',
+        }],
+      },
+    })}\n\n`,
+    'data: {"type":"Finish","request_id":"req-1"}\n\n',
+  ];
+  const stream = new ReadableStream({
+    start(controller) {
+      for (const frame of frames) controller.enqueue(new TextEncoder().encode(frame));
+      controller.close();
+    },
+  });
+
+  await assert.rejects(
+    consumeSessionEventsUntilFinish(stream, { requestId: 'req-1', timeoutMs: 5000 }),
+    (error) => {
+      assert.equal(error.code, 'SESSION_REASONING_CONTENT_POISONED');
+      assert.match(error.message, /reasoning_content/);
+      return true;
+    },
+  );
+});
+
 test('consumeSessionEventsUntilFinish surfaces provider tool history errors before Finish', async () => {
   const frames = [
     `data: ${JSON.stringify({