diff --git a/nanobot/agent/loop.py b/nanobot/agent/loop.py
index 5fe0ee0e2f..cf2137ead6 100644
--- a/nanobot/agent/loop.py
+++ b/nanobot/agent/loop.py
@@ -475,6 +475,8 @@ def _save_turn(self, session: Session, messages: list[dict], skip: int) -> None:
                     if not filtered:
                         continue
                     entry["content"] = filtered
+            entry.pop("reasoning_content", None)
+            entry.pop("thinking_blocks", None)
             entry.setdefault("timestamp", datetime.now().isoformat())
             session.messages.append(entry)
         session.updated_at = datetime.now()