Update app.py

app.py

@@ -72,6 +72,7 @@ def tool_selector(state: AgentState) -> AgentState:
         )
     )
     raw = LLM(state.messages + [prompt]).content.strip()
+    print(f"Tool selector response: {raw}")
     state.add(AIMessage(content=raw))
     parsed = safe_json(raw)
     if not parsed or "action" not in parsed:
@@ -124,6 +125,8 @@ def excel_tool(state: AgentState) -> AgentState:
 def final_node(state: AgentState) -> AgentState:
     wrap = SystemMessage(
         content="Using everything so far, reply ONLY with {'final_answer':'…'}. YOUR FINAL ANSWER should be a number OR as few words as possible OR a comma separated list of numbers and/or strings. If you are asked for a number, don't use comma to write your number neither use units such as $ or percent sign unless specified otherwise. If you are asked for a string, don't use articles, neither abbreviations (e.g. for cities), and write the digits in plain text unless specified otherwise. If you are asked for a comma separated list, apply the above rules depending of whether the element to be put in the list is a number or a string."
+        "reply **only** with "
+        "{\"final_answer\":\"…\"} (no markdown, no commentary)."
     )
     raw = LLM(state.messages + [wrap]).content.strip()
     state.add(AIMessage(content=raw))