diff --git a/.speakeasy/overlays/allof-simplify.overlay.yaml b/.speakeasy/overlays/allof-simplify.overlay.yaml
new file mode 100644
index 0000000..44ac54b
--- /dev/null
+++ b/.speakeasy/overlays/allof-simplify.overlay.yaml
@@ -0,0 +1,11 @@
+overlay: 1.0.0
+x-speakeasy-jsonpath: rfc9535
+info:
+  title: Simplify redundant allOf inline schemas
+  version: 0.0.0
+actions:
+  - target: "$..allOf[?@.enum && !@['$ref']]"
+    description: >
+      Remove inline enum definitions that duplicate a $ref enum in the same
+      allOf. These are artifacts from zod-openapi .extend() serialization.
+    remove: true
diff --git a/.speakeasy/workflow.yaml b/.speakeasy/workflow.yaml
index c273ecf..a56576a 100644
--- a/.speakeasy/workflow.yaml
+++ b/.speakeasy/workflow.yaml
@@ -8,6 +8,7 @@ sources:
             - location: .speakeasy/overlays/open-enums.overlay.yaml
             - location: .speakeasy/overlays/remove-rss-responses.overlay.yaml
             - location: .speakeasy/overlays/add-headers.overlay.yaml
+            - location: .speakeasy/overlays/allof-simplify.overlay.yaml
         output: .speakeasy/out.openapi.yaml
         registry:
             location: registry.speakeasyapi.dev/openrouter/sdk/open-router-chat-completions-api