feat : manage planning steps.

agent.py

@@ -62,6 +62,7 @@ class SmolAlbert(CodeAgent):
                 "Do not invent URL(s) — only use the ones you were provided."
                 "If the answer includes an image URL, include it as an inline Markdown image: ![image](<image_url>)"
             ),
+            planning_interval=5,  # plan every 5 steps
             #additional_authorized_imports=[""]
         )