Update app.py

app.py

@@ -14,6 +14,12 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 # --- Basic Agent Definition ---
 # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
 class BasicAgent:
+    system_prompt = """You are a helpful assistant tasked with answering questions using a set of tools.
+Now, I will ask you a question. Report your thoughts, and finish your answer with the following template:
+FINAL ANSWER: [YOUR 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.
+Your answer should only start with "FINAL ANSWER: ", then follows with the answer.
+"""
     def __init__(self):
         print("BasicAgent initialized.")
         self.graph = build_graph()
@@ -21,7 +27,14 @@ class BasicAgent:
     def __call__(self, question: str) -> str:
         print(f"Agent received question (first 50 chars): {question[:50]}...")
         # Wrap the question in a HumanMessage from langchain_core
-        messages = [HumanMessage(content=question)]
+        #messages = [HumanMessage(content=question)]
+        messages = [
+        SystemMessage(
+            content=system_prompt
+        ),
+        HumanMessage(
+            content=question
+        )]
         messages = self.graph.invoke({"messages": messages})
         answer = messages['messages'][-1].content
         return answer[14:]