Function build_system_prompt_with_tool_calls 

pub fn build_system_prompt_with_tool_calls(
    workspace_dir: &Path,
    model_name: &str,
    tools: &[(&str, &str)],
    skills: &[Skill],
    identity_config: Option<&IdentityConfig>,
    bootstrap_max_chars: Option<usize>,
    show_tool_calls: bool,
) -> String

Like build_system_prompt but accepts show_tool_calls to control whether the system prompt instructs the model to hide tool narration.