diff --git a/.github/workflows/debug.yml b/.github/workflows/debug.yml
new file mode 100644
index 0000000..9f86e4a
--- /dev/null
+++ b/.github/workflows/debug.yml
@@ -0,0 +1,54 @@
+name: Debug bundler cache
+
+on:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  debug-cache:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Check cache key info
+        run: |
+          echo "Target cache key:"
+          echo "setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.4.3-wd-/home/runner/work/oneaws/oneaws-with--without--only--Gemfile.lock-36065e319b837aa77cd3b4c14c539ffdd8faf90b6849cdd0ada7543b3fc87f60"
+          echo ""
+          echo "Key length: $(echo 'setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.4.3-wd-/home/runner/work/oneaws/oneaws-with--without--only--Gemfile.lock-36065e319b837aa77cd3b4c14c539ffdd8faf90b6849cdd0ada7543b3fc87f60' | wc -c)"
+
+      - name: Download bundler cache (restore only)
+        uses: actions/cache/restore@v5
+        with:
+          path: ./cache
+          key: setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.4.3-wd-/home/runner/work/oneaws/oneaws-with--without--only--Gemfile.lock-36065e319b837aa77cd3b4c14c539ffdd8faf90b6849cdd0ada7543b3fc87f60
+          restore-keys: |
+            setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.4.3-wd-/home/runner/work/oneaws/oneaws-with--without--only--Gemfile.lock-
+            setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.4.3-wd-/home/runner/work/oneaws/oneaws-
+            setup-ruby-bundler-cache-v6-ubuntu-24.04-x64-ruby-3.4.3-
+            setup-ruby-bundler-cache-v6-ubuntu-24.04-
+            setup-ruby-bundler-cache-v6-
+
+      - name: List cache contents
+        run: |
+          echo "Cache directory contents:"
+          ls -la ./cache || echo "Cache directory not found"
+          echo ""
+          echo "Recursive cache directory listing:"
+          ls -laR ./cache || echo "Cache directory not found for recursive listing"
+          echo ""
+          find ./cache -type f -name "*.lock" 2>/dev/null || echo "No .lock files found"
+
+      - name: Show current Gemfile.lock
+        run: |
+          echo "Current Gemfile.lock contents:"
+          if [ -f Gemfile.lock ]; then
+            cat Gemfile.lock
+          else
+            echo "Gemfile.lock not found in current directory"
+          fi
+
+      - name: Search for Gemfile.lock in cache
+        run: |
+          echo "Searching for Gemfile.lock in cache directory:"
+          find ./cache -name "Gemfile.lock" -type f -exec echo "Found: {}" \; -exec cat {} \; 2>/dev/null || echo "No Gemfile.lock found in cache"