diff --git a/.github/workflows/fullsend.yaml b/.github/workflows/fullsend.yaml
index 71a1bbb..42cb342 100644
--- a/.github/workflows/fullsend.yaml
+++ b/.github/workflows/fullsend.yaml
@@ -1,3 +1,7 @@
+# This file is managed by fullsend. Do not edit it directly.
+# Upstream: https://github.com/fullsend-ai/fullsend/blob/main/internal/scaffold/fullsend-repo/templates/shim-workflow-call.yaml
+---
+# --- fullsend managed below - do not edit ---
 # lint-workflow-size: max-lines=280
 # fullsend shim workflow (workflow_call mode)
 # Routes events to agent workflows in .fullsend via workflow_call.