Reading /src/client.c:

/*
 * Network error handling
 * On APIConnectionError or 502 Bad Gateway, retry with backoff.
 * On ECONNREFUSED the server is likely down — wait and try again.
 * See docs/network.md for retry policy.
 */
int client_retry(int code) {
    if (code == 502) return RETRY;
    return FAIL;
}

F2.1 prose-scrub must strip /* and * continuation → no api-error false-positive.