diff --git a/src/daemon/review.py b/src/daemon/review.py
index 1f05467..fdf889e 100644
--- a/src/daemon/review.py
+++ b/src/daemon/review.py
@@ -307,14 +307,8 @@ class RebuttalManager:
             try:
                 self.bb.add_observation(
                     task_id=task_id,
-                    agent=agent_id,
-                    obs_type="rebuttal",
-                    content=f"Rebuttal round {round_num}: {reason[:200]}",
-                    detail=json.dumps({
-                        "round": round_num,
-                        "reason": reason,
-                        "evidence": evidence,
-                    }),
+                    observer=agent_id,
+                    body=f"Rebuttal round {round_num}: {reason[:200]}",
                 )
             except Exception:
                 logger.exception("Failed to record rebuttal")
@@ -334,7 +328,7 @@ class RebuttalManager:
         if not self.bb:
             return 0
         try:
-            observations = self.bb.list_observations(task_id=task_id)
-            return sum(1 for o in observations if o.get("obs_type") == "rebuttal")
+            observations = self.bb.get_observations(task_id=task_id)
+            return sum(1 for o in observations if "Rebuttal round" in (o.body or ""))
         except Exception:
             return 0