diff --git a/agent_test_sample.py b/agent_test_sample.py
new file mode 100644
index 00000000000000..b1d10c09b7cd38
--- /dev/null
+++ b/agent_test_sample.py
@@ -0,0 +1,4 @@
+def add_numbers(a, b):
+    """Add two numbers."""
+    # Deliberate bug for testing the PR review agent
+    return a - b