diff --git a/src/blackboard/models.py b/src/blackboard/models.py
index 13044be..70325b2 100644
--- a/src/blackboard/models.py
+++ b/src/blackboard/models.py
@@ -51,6 +51,7 @@ class Comment:
     comment_type: str = "general"
     body: str = ""
     mentions: Optional[str] = None  # JSON array string
+    card_id: Optional[str] = None
     created_at: Optional[str] = None
 
     @classmethod
@@ -69,6 +70,7 @@ class Output:
     summary: Optional[str] = None
     metadata: Optional[str] = None  # JSON
     attempt_number: int = 1
+    card_id: Optional[str] = None
     created_at: Optional[str] = None
 
     @classmethod
@@ -114,6 +116,7 @@ class Event:
     agent: Optional[str] = None
     event_type: str = ""
     detail: Optional[str] = None  # JSON
+    card_id: Optional[str] = None
     created_at: Optional[str] = None
 
     @classmethod
@@ -135,6 +138,7 @@ class Review:
     consensus_reached: bool = False
     summary: str = ""
     detail_path: Optional[str] = None
+    card_id: Optional[str] = None
     created_at: Optional[str] = None
 
     @classmethod