diff --git a/apps/mobile-shell/scripts/check-config.mjs b/apps/mobile-shell/scripts/check-config.mjs
index d3cdc01a4..f3fb7368d 100644
--- a/apps/mobile-shell/scripts/check-config.mjs
+++ b/apps/mobile-shell/scripts/check-config.mjs
@@ -1,4 +1,5 @@
 import fs from 'node:fs';
+import { spawnSync } from 'node:child_process';
 
 import { PNG } from 'pngjs';
 
@@ -405,6 +406,10 @@ const blockedAndroidPermissions = [
   'android.permission.USE_EXACT_ALARM',
   'android.permission.WRITE_EXTERNAL_STORAGE',
 ];
+const generatedMobilePaths = [
+  'apps/mobile-shell/.expo',
+  'apps/mobile-shell/.expo-export-smoke',
+];
 
 function extractStringArrayExport(source, exportName, seen = new Set()) {
   if (seen.has(exportName)) {
@@ -686,6 +691,34 @@ function assertNoDevScaffoldTerms(files) {
   }
 }
 
+function assertNoTrackedMobileGeneratedFiles() {
+  const result = spawnSync('git', ['ls-files', ...generatedMobilePaths], {
+    cwd: new URL('../../..', import.meta.url),
+    encoding: 'utf8',
+  });
+
+  if (result.error) {
+    throw new Error(
+      `unable to check mobile generated files: ${result.error.message}`,
+    );
+  }
+  if ((result.status ?? 0) !== 0) {
+    throw new Error(
+      `unable to check mobile generated files: ${result.stderr.trim()}`,
+    );
+  }
+
+  const trackedGeneratedFiles = result.stdout
+    .split('\n')
+    .map((entry) => entry.trim())
+    .filter(Boolean);
+  if (trackedGeneratedFiles.length > 0) {
+    throw new Error(
+      `mobile generated files must stay untracked: ${trackedGeneratedFiles.join(', ')}`,
+    );
+  }
+}
+
 function countAlphaPixels(png) {
   let transparent = 0;
   let translucent = 0;
@@ -776,6 +809,7 @@ for (const snippet of [
 assertNoDevScaffoldTerms(
   productionSourceRoots.flatMap((root) => collectProductionSourceFiles(root)),
 );
+assertNoTrackedMobileGeneratedFiles();
 assertNoBlockedMobileChannelDependencies(packageConfig, 'mobile shell package');
 assertNoBlockedMobileChannelDependencies(rootPackageConfig, 'root H5 package');
 assertNoBlockedMobileChannelLockPackages();