diff --git a/.open-actions/workflows/ci.yaml b/.open-actions/workflows/ci.yaml
index c08f32e..ca81377 100644
--- a/.open-actions/workflows/ci.yaml
+++ b/.open-actions/workflows/ci.yaml
@@ -30,6 +30,15 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version-file: go.mod
+      - name: Diagnose verify environment
+        run: |
+          git rev-parse HEAD
+          go version
+          go env GOTOOLCHAIN GOOS GOARCH CGO_ENABLED
+          wc -l go.sum
+          sha256sum go.sum
+          git show HEAD:go.sum | sha256sum
+          git status --short
       - name: Verify
         run: make verify
 
diff --git a/docs/dev-cluster-smoke-test.md b/docs/dev-cluster-smoke-test.md
new file mode 100644
index 0000000..01ca3f4
--- /dev/null
+++ b/docs/dev-cluster-smoke-test.md
@@ -0,0 +1,4 @@
+# Dev Cluster Smoke Test
+
+This temporary change triggers the pull request workflow on the Open Actions
+development cluster.