bugfix

app.py

@@ -78,6 +78,9 @@ def create_tools(cfg):
     )
 
 def initialize_agent(_cfg):
+    if 'agent' in st.session_state:
+        return st.session_state.agent
+
     bot_instructions = f"""
     - You are a helpful teacher assistant, with expertise in education in various teaching styles.
     - Obtain information using tools to answer the user's query.