diff --git a/rest/python/client/flower_shop/sample_output/happy_path_dialog.md b/rest/python/client/flower_shop/sample_output/happy_path_dialog.md
index 14e3c3c9..675b6344 100644
--- a/rest/python/client/flower_shop/sample_output/happy_path_dialog.md
+++ b/rest/python/client/flower_shop/sample_output/happy_path_dialog.md
@@ -12,6 +12,10 @@
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
+
+Note:
+   This file is automatically generated by running simple_happy_path_client.py.
+   Do not modify manually.
 -->
 
 # UCP Happy Path Interaction Log
diff --git a/rest/python/client/flower_shop/simple_happy_path_client.py b/rest/python/client/flower_shop/simple_happy_path_client.py
index 1a6fcfc1..c8a11b28 100644
--- a/rest/python/client/flower_shop/simple_happy_path_client.py
+++ b/rest/python/client/flower_shop/simple_happy_path_client.py
@@ -180,6 +180,26 @@ def main() -> None:
   # Clear the export file if it exists
   if args.export_requests_to:
     with Path(args.export_requests_to).open("w", encoding="utf-8") as f:
+      f.write("""<!--
+   Copyright 2026 UCP Authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+Note:
+   This file is automatically generated by running simple_happy_path_client.py.
+   Do not modify manually.
+-->
+""")
       f.write("# UCP Happy Path Interaction Log\n\n")
       f.write("### Configuration\n\n")
       f.write(f"```bash\nexport SERVER_URL={args.server_url}\n```\n\n")