diff --git a/migration/run_clang_tidy_common.sh b/migration/run_clang_tidy_common.sh
new file mode 100755
index 000000000..be07e974a
--- /dev/null
+++ b/migration/run_clang_tidy_common.sh
@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+echo "Ensuring clang-tidy and clang-format are installed"
+apt-get update
+apt-get install -y clang-tidy clang-format || true
+
+BUILD_DIR=/repo/build_migrate_Lts_Common
+if [ ! -f "$BUILD_DIR/compile_commands.json" ]; then
+  echo "Regenerating compile_commands.json"
+  cmake -S /repo -B $BUILD_DIR -G Ninja -DCMAKE_PREFIX_PATH=/opt/Qt/6.8.3/gcc_64 -DCMAKE_CXX_STANDARD=20 -DMIGRATE_MODULE=Lts/Common -DBUILD_TESTING=ON -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
+fi
+
+echo "Running clang-tidy (safe modernize checks)"
+CHECKS="modernize-*,-modernize-use-trailing-return-type,-modernize-raw-string-literal"
+
+# Process each C/C++ source/header under Lts/Common
+git ls-files Lts/Common | grep -E '\.(cpp|cc|cxx|h|hpp)$' | while read -r f; do
+  echo "clang-tidy $f"
+  clang-tidy "$f" -p "$BUILD_DIR" -checks="$CHECKS" --format-style=file -fix -quiet || true
+done
+
+# Format any modified files
+git ls-files -m | grep '^Lts/Common' | while read -r f; do
+  echo "clang-format $f"
+  clang-format -i "$f" || true
+done
+
+# Commit changes if any
+if [ -n "$(git status --porcelain)" ]; then
+  git add Lts/Common || true
+  git commit -m "migrate(Lts/Common): apply clang-tidy modernization fixes\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>" || true
+fi
+
+echo "Done. Modified files:"
+git status --porcelain