diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ef46a0c8..b9a4d7d3 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -26,6 +26,13 @@ jobs:
       - name: fetch source
         uses: actions/checkout@v4
 
+      - name: debug clang-format config
+        run: |
+          apt update
+          apt install -y clang-format
+          clang-format --version
+          clang-format -style=file --dump-config
+
       - name: install ROS2 ${{ matrix.distribution }}
         uses: ros-tooling/setup-ros@v0.7
         with: