Function await_shutdown 

pub(crate) async fn await_shutdown(
    client: &Client,
    local_url: &str,
    auth_key: &str,
    request_id: &str,
    to_the_end: bool,
) -> Value

Polls srv for a shutdown waiting on the user’s override (SPEC_AGENT_SELF_QUIT_2026_09_24.md §6.5) until it leaves pending — and proceeding too when to_the_end — and returns the last status seen. One long request instead would outlast the client’s own timeout.