diff --git a/pipelines/arc/runner-scaleset.yaml b/pipelines/arc/runner-scaleset.yaml
index 3fa857b..c38d0d8 100644
--- a/pipelines/arc/runner-scaleset.yaml
+++ b/pipelines/arc/runner-scaleset.yaml
@@ -13,28 +13,8 @@ runnerScaleSetName: "self-hosted-gremlin"
 githubConfigSecret:
   github_token: "PLACEHOLDER"
 
-# Kubernetes container mode — workflow steps run as separate containers (no DinD)
+# Docker-in-Docker mode — runner has a full Docker daemon, works like GitHub-hosted runners
+# NOTE: Do NOT override template.spec when using containerMode — the chart auto-injects
+# the correct DinD sidecar, volume mounts, DOCKER_HOST env, and startup probes.
 containerMode:
-  type: kubernetes
-  kubernetesModeWorkVolumeClaim:
-    accessModes: ["ReadWriteOnce"]
-    storageClassName: "local-path"
-    resources:
-      requests:
-        storage: 1Gi
-
-# Ephemeral runners — each job gets a clean pod
-ephemeral: true
-
-# Resource limits per runner pod
-template:
-  spec:
-    containers:
-      - name: runner
-        resources:
-          limits:
-            cpu: "2"
-            memory: 4Gi
-          requests:
-            cpu: "1"
-            memory: 2Gi
+  type: dind