diff --git a/platforms/argon/carbon/ampharos.yaml b/platforms/argon/carbon/ampharos.yaml
new file mode 100644
index 0000000..cdd8f44
--- /dev/null
+++ b/platforms/argon/carbon/ampharos.yaml
@@ -0,0 +1,9 @@
+# machine-written stub (T3 materializer). Kargo writes pin.*; values: is a human emergency override.
+platform: argon
+service: carbon
+landscape: ampharos
+pin:
+  primordial: ""
+  chart: ""
+  image: ""
+values: {}