import { type UpgradeOffer } from "./upgrade.js";
/** Render any thrown value as a message safe to return to the model. */
export declare function formatError(error: unknown): string;
/**
 * Error carrying a structured upgrade offer, so a caller that wants the raw
 * data (rather than the rendered card) can still reach it.
 */
export declare class PlanLimitError extends Error {
    readonly offer: UpgradeOffer;
    constructor(offer: UpgradeOffer, rendered: string);
}
/**
 * Turn a non-2xx API response into an Error carrying the server's own message.
 *
 * When the body is a plan-limit rejection, the message becomes the full
 * rendered upgrade card — so EVERY tool in this server surfaces the upsell
 * automatically, without each one needing to handle quota errors itself.
 */
export declare function apiError(status: number, body: unknown): Error;
//# sourceMappingURL=errors.d.ts.map