diff --git a/frontend/tests/e2e/thread-routing.spec.ts b/frontend/tests/e2e/thread-routing.spec.ts
index 1e1b0408..13b18f9f 100644
--- a/frontend/tests/e2e/thread-routing.spec.ts
+++ b/frontend/tests/e2e/thread-routing.spec.ts
@@ -1,15 +1,22 @@
 import { expect, test } from "@playwright/test";
+import { v4 as uuid } from "uuid";
 
 import {
   THREAD_FOR_WELCOME,
   newChatEntry,
   openChat,
   reuseThreadChatEntry,
+  sendMessage,
   skipIfMissingThread,
   waitForAnyMessages,
   waitForMessageListReady,
 } from "./support/chat-helpers";
 
+test.use({
+  screenshot: "on",
+  video: "on",
+});
+
 test.describe("线程路由（无 isnew）", () => {
   test("/new 始终走欢迎态，发送后进入具体 thread 路由", async ({ page }, testInfo) => {
     skipIfMissingThread(testInfo, THREAD_FOR_WELCOME, "FRONTEND_E2E_THREAD_ID");
@@ -29,4 +36,46 @@ test.describe("线程路由（无 isnew）", () => {
     await expect(page).toHaveURL(new RegExp(`/workspace/chats/${THREAD_FOR_WELCOME!}`));
     await expect(page.locator(".is-user, .is-assistant").first()).toBeVisible();
   });
+
+  test("/new 使用 uuid thread_id 发送后触发 stream(cod=0) 并进入 thread 路由", async ({
+    page,
+  }) => {
+    const threadId = uuid();
+    const text = `e2e-${threadId.slice(0, 8)}`;
+
+    await openChat(page, newChatEntry(threadId));
+    await expect(page.getByTestId("welcome-suggestions")).toBeVisible();
+
+    const streamRequestPromise = page.waitForRequest(
+      (request) => {
+        const url = request.url();
+        if (!url.includes("/stream")) return false;
+        if (!url.includes(threadId)) return false;
+        try {
+          const parsed = new URL(url);
+          return parsed.searchParams.get("cancel_on_disconnect") === "0";
+        } catch {
+          return url.includes("cancel_on_disconnect=0");
+        }
+      },
+      { timeout: 30_000 },
+    );
+
+    await sendMessage(page, text);
+    await expect(page.locator(".is-user").filter({ hasText: text })).toHaveCount(1);
+    await expect
+      .poll(
+        async () => await page.locator(".is-assistant").count(),
+        { timeout: 30_000 },
+      )
+      .toBeGreaterThan(0);
+
+    const streamRequest = await streamRequestPromise;
+    expect(streamRequest.url()).toContain("cancel_on_disconnect=0");
+
+    await expect(page).toHaveURL(
+      new RegExp(`/workspace/chats/${threadId}\\?is_chatting=true`),
+      { timeout: 30_000 },
+    );
+  });
 });