diff --git a/components/schemas/containers/extension/ContainerExtension.yml b/components/schemas/containers/extension/ContainerExtension.yml
new file mode 100644
index 00000000..b40c3fc0
--- /dev/null
+++ b/components/schemas/containers/extension/ContainerExtension.yml
@@ -0,0 +1,14 @@
+title: ContainerExtension
+type:
+  - object
+  - "null"
+description: Reference to container functionality that is added by the Cycle platform.
+required:
+  - identifier
+properties:
+  identifier:
+    type: string
+    enum:
+      - "virtual-machine-v1"
+  id:
+    $ref: ../../ID.yml
\ No newline at end of file
diff --git a/components/schemas/containers/instances/Instance.yml b/components/schemas/containers/instances/Instance.yml
index 3ddcde00..5da6f7ae 100644
--- a/components/schemas/containers/instances/Instance.yml
+++ b/components/schemas/containers/instances/Instance.yml
@@ -80,6 +80,10 @@ properties:
   service:
     $ref: ../ServiceContainerIdentifier.yml
     description: The type of service this instance is within the environment, if any.
+  extension:
+    anyOf:
+      - $ref: ../extension/ContainerExtension.yml
+      - type: "null"
   state:
     $ref: InstanceState.yml
   autoscale:
diff --git a/components/schemas/containers/summaries/ImageSummary.yml b/components/schemas/containers/summaries/ImageSummary.yml
index a583c434..7150b34a 100644
--- a/components/schemas/containers/summaries/ImageSummary.yml
+++ b/components/schemas/containers/summaries/ImageSummary.yml
@@ -11,19 +11,9 @@ properties:
       - $ref: "../../ID.yml"
       - type: "null"
   extension:
-    type:
-      - object
-      - "null"
-    description: An image that is packaged with Cycle directly, such as the global load balancer.
-    required:
-      - identifier
-    properties:
-      identifier:
-        type: string
-        enum:
-          - "virtual-machine-v1"
-      id:
-        $ref: ../../ID.yml
+    anyOf: 
+      - $ref: ../extension/ContainerExtension.yml
+      - type: "null"
   service:
     anyOf:
       - $ref: ../ServiceContainerIdentifier.yml