diff --git a/.github/workflows/guardrails-diagnostic.yml b/.github/workflows/guardrails-diagnostic.yml
new file mode 100644
index 0000000..60c08a3
--- /dev/null
+++ b/.github/workflows/guardrails-diagnostic.yml
@@ -0,0 +1,16 @@
+name: Guardrails Diagnostic
+
+on:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  startup-check:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+
+    steps:
+      - name: Confirm runner startup
+        run: echo "runner-started"