def update_plan():
    """this function checks if the file plan.md exists, if it doesn't exist it gets created"""

    current_working_directory = os.getcwd()
    workdir = os.path.join(current_working_directory, 'auto_gpt_workspace', 'plan.md')

    file_name = workdir

    with open(file_name, 'r') as file:
        data = file.read()

    response = generate_improved_plan(data)

    with open(file_name, "w") as file:
        file.write(response)
    print(f"{file_name} updated.")

    return response
this function checks if the file plan.md exists, if it doesn't exist it gets created
src/autogpt_plugins/planner/planner.py