from langchain.agents import create_agent
from langgraph.checkpoint.memory import InMemorySaver
from langchain_community.tools import DuckDuckGoSearchRun


system_prompt = """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."""


agent = create_agent(
    model="google-genai:gemini-2.5-flash",
    tools=[DuckDuckGoSearchRun()],
    system_prompt=system_prompt,
    checkpointer=InMemorySaver(),
)