use codex_backend_client::Client as BackendClient;use codex_core::config::Config;use codex_login::AuthManager;use codex_protocol::protocol::RateLimitSnapshot;use codex_protocol::protocol::RateLimitWindow;use tracing::info;use tracing::warn;pub(crate) async fn rate_limits_ok(auth_manager: &AuthManager, config: &Config) -> bool {    rate_limits_check(auth_manager, config)        .await        .unwrap_or(true)}async fn rate_limits_check(auth_manager: &AuthManager, config: &Config) -> Option<bool> {    let auth = auth_manager.auth().await?;    if !auth.uses_codex_backend() {        return None;    }    let client = BackendClient::from_auth(config.chatgpt_base_url.clone(), &auth)        .map_err(|err| warn!(%err, "failed to construct backend client"))        .ok()?;    let snapshots = client        .get_rate_limits_many()        .await        .map_err(|err| warn!(%err, "failed to fetch rate limits"))        .ok()?;    let snapshot = snapshots        .iter()        .find(|s| s.limit_id.as_deref() == Some(crate::guard_limits::CODEX_LIMIT_ID))        .or_else(|| snapshots.first())?;    let min_remaining_percent = config.memories.min_rate_limit_remaining_percent;    let allowed = snapshot_allows_startup(snapshot, min_remaining_percent);    if !allowed {        info!(            min_remaining_percent,            "skipping memories startup because Codex rate limits are below the configured threshold"        );    }    Some(allowed)}fn snapshot_allows_startup(snapshot: &RateLimitSnapshot, min_remaining_percent: i64) -> bool {    if snapshot.rate_limit_reached_type.is_some() {        return false;    }    let max_used_percent = 100.0 - min_remaining_percent.clamp(0, 100) as f64;    window_allows_startup(snapshot.primary.as_ref(), max_used_percent)        && window_allows_startup(snapshot.secondary.as_ref(), max_used_percent)}fn window_allows_startup(window: Option<&RateLimitWindow>, max_used_percent: f64) -> bool {    match window {        Some(window) => window.used_percent <= max_used_percent,        None => true,    }}#[cfg(test)]#[path = "guard_tests.rs"]mod tests;