/**
 * Whether an OAuth refresh failure is definitive (the credential must be
 * disabled) versus transient. Thin alias over the {@link Flag.OAuthExpiry}
 * text classifier {@link isOAuthExpiry}; retained as the public
 * `@oh-my-pi/pi-ai` entrypoint name used by the coding agent and auth-broker.
 */
export declare function isDefinitiveOAuthFailure(errorMsg: string): boolean;
/**
 * Whether an upstream failure should rotate to a sibling credential: a hard
 * `401`, a body-classified usage limit (Codex `usage_limit_reached`, Anthropic
 * account rate-limit, Google `resource_exhausted`, OpenAI `insufficient_quota`,
 * …), or a bare `429` whose payload did not preserve a richer quota code.
 * Transient 429s (`Too many requests`, per-minute caps) stay in the
 * upstream-backoff lane.
 */
export declare function isAuthRetryableError(error: unknown): boolean;