export type EmbeddedContextFile = {
    path: string;
    content: string;
};
export type FailoverReason = "auth" | "format" | "rate_limit" | "billing"
/** The model BACKEND is down on our side (e.g. the shared service account is
 * unfunded) — an infra outage, not the user's balance or a rate limit. Still
 * triggers fallover, but never advertises self-healing "retry in a moment". */
 | "service_unavailable" | "timeout" | "unknown";