fix(pre-commit): improve monorepo handling and failure messaging (#9123)

Co-authored-by: matt korwel <matt.korwel@gmail.com>

.husky/pre-commit

@@ -1 +1,9 @@
-npm run pre-commit
+npm run pre-commit || {
+  echo ''
+  echo '===================================================='
+  echo 'pre-commit checks failed. in case of emergency, run:'
+  echo ''
+  echo 'git commit --no-verify'
+  echo '===================================================='
+  exit 1
+}

package.json

@@ -52,7 +52,7 @@
     "telemetry": "node scripts/telemetry.js",
     "check:lockfile": "node scripts/check-lockfile.js",
     "clean": "node scripts/clean.js",
-    "pre-commit": "lint-staged"
+    "pre-commit": "node scripts/pre-commit.js"
   },
   "bin": {
     "gemini": "bundle/gemini.js"

scripts/pre-commit.js

@@ -0,0 +1,22 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { execSync } from 'node:child_process';
+import lintStaged from 'lint-staged';
+
+try {
+  // Get repository root
+  const root = execSync('git rev-parse --show-toplevel').toString().trim();
+
+  // Run lint-staged with API directly
+  const passed = await lintStaged({ cwd: root });
+
+  // Exit with appropriate code
+  process.exit(passed ? 0 : 1);
+} catch {
+  // Exit with error code
+  process.exit(1);
+}