def get_llm(model_name: str = "mistral:latest") -> ChatOllama:
    """
    Create and configure a ChatOllama instance for local LLM inference.
    
    This function initializes a ChatOllama client configured to connect to a
    local Ollama server. The client is set up with deterministic output
    (temperature=0) for consistent responses across multiple calls with the
    same input.
    
    Parameters
    ----------
    model_name : str, optional
        The name of the Ollama model to use for chat completions.
        Must be a valid model name that is available on the local Ollama
        installation. Default is "mistral:latest".
    
    Returns
    -------
    ChatOllama
        A configured ChatOllama instance ready for chat completions.
    """
    return ChatOllama(
        model=model_name, base_url="http://localhost:11434", temperature=0
    )


print(get_llm().invoke("test").content)