diff --git a/bridge.py b/bridge.py
index 9676c9b..48f937e 100644
--- a/bridge.py
+++ b/bridge.py
@@ -44,6 +44,7 @@ class ApprovalRequest:
     status: str = "pending"
     discord_message_id: int = 0
     project_name: str = ""  # Project routing key
+    step_type: str = ""  # e.g. 'diff_review', passed through to response
 
 
 @dataclass