feat: allow read private folder during rsc

e2e/fixtures/ssr-basic/private/config.ts

@@ -0,0 +1,3 @@
+export default {
+  content: 'hello world',
+};

e2e/fixtures/ssr-basic/src/components/App.tsx

@@ -6,6 +6,7 @@ import { AIProvider } from '../ai/index.js';
 import { AIClient } from './AIClient.js';
 import { TestEnvServer } from './test-env/server.js';
 import { TestEnvClient } from './test-env/client.js';
+import config from '../../private/config.js';
 
 const DelayedBackground = async () => {
   await new Promise((resolve) => setTimeout(resolve, 2000));
@@ -48,6 +49,10 @@ const App = ({ name }: { name: string }) => {
               <TestEnvClient />
             </div>
           </section>
+          <section>
+            <h2>Private Config</h2>
+            <div data-testid="private-content">{config.content}</div>
+          </section>
         </div>
       </body>
     </html>

e2e/ssr-basic.spec.ts

@@ -112,4 +112,11 @@ test.describe(`ssr-basic`, () => {
       ),
     );
   });
+
+  test('private directory access', async ({ page }) => {
+    await page.goto(`http://localhost:${port}/`);
+
+    const privateContent = page.getByTestId('private-content');
+    await expect(privateContent).toHaveText('hello world');
+  });
 });

packages/waku/src/vite-rsc/plugin.ts

@@ -538,8 +538,13 @@ if (import.meta.hot) {
     {
       name: 'rsc:private-dir',
       load(id) {
+        if (this.environment.name === 'rsc') {
+          return;
+        }
         if (id.startsWith(privatePath)) {
-          throw new Error('Private file access is not allowed');
+          throw new Error(
+            'Load private directory in client side is not allowed',
+          );
         }
       },
       hotUpdate(ctx) {