diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..643577d
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,9 @@
+<!-- BEGIN:nextjs-agent-rules -->
+
+# This is NOT the Next.js you know
+
+This version has breaking changes — APIs, conventions, and file structure may all differ from your training data. Read the relevant guide in `node_modules/next/dist/docs/` (resolved from this file's directory; in monorepos the `next` package may not be visible from the repo root) before writing any code. Heed deprecation notices.
+
+This block is written and re-added by `next dev` — verify at `node_modules/next/dist/server/lib/generate-agent-files.js`. Removing it from a diff only re-creates the uncommitted change; committing it with your work keeps the tree clean.
+
+<!-- END:nextjs-agent-rules -->
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..43c994c
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1 @@
+@AGENTS.md
diff --git a/next.config.ts b/next.config.ts
index 2f6491c..bc9d826 100644
--- a/next.config.ts
+++ b/next.config.ts
@@ -2,6 +2,13 @@ import type { NextConfig } from "next";
 
 const nextConfig: NextConfig = {
   reactStrictMode: true,
+  async rewrites() {
+    // 设置 TTS_MOCK_UPSTREAM（见 .env.local）时，把 AI Lab 页面的 /tts/v1/* 请求代理到本地 mock TTS 服务。
+    // 生产环境不设置该变量，走 NEXT_PUBLIC_TTS_BASE_URL 指向真实引擎，行为不变。
+    const target = process.env.TTS_MOCK_UPSTREAM;
+    if (!target) return [];
+    return [{ source: "/tts/v1/:path*", destination: `${target}/v1/:path*` }];
+  },
 };
 
 export default nextConfig;