/**
 * Discriminator for {@link EveAttachmentError}.
 *
 * Today the only literal ever produced in the codebase is
 * `"resolver-threw"`. The union remains a discriminated type so future
 * producers can broaden it intentionally rather than as an accident of
 * a string parameter that drifted.
 */
type EveAttachmentErrorKind = "resolver-threw";
/**
 * Input shape for {@link EveAttachmentError}. Separated from the class
 * constructor so callers can build the options object inline and TS
 * can check the `kind` / `message` pair without a positional
 * constructor signature.
 */
interface EveAttachmentErrorInput {
    readonly kind: EveAttachmentErrorKind;
    readonly message: string;
    readonly adapterKind?: string;
    readonly cause?: unknown;
}
/**
 * Error surfaced when an attachment resolver fails to produce bytes for
 * an {@link AttachmentRef}.
 *
 * Channels can inspect the `.kind` discriminator to decide whether to
 * drop the attachment and continue the turn (the default posture for
 * every kind today) or fail the whole delivery (future strict mode).
 * The original failure, when there is one, is preserved on `.cause` so
 * observability can surface the upstream error without losing context.
 */
export declare class EveAttachmentError extends Error {
    readonly kind: EveAttachmentErrorKind;
    readonly adapterKind?: string;
    readonly cause?: unknown;
    constructor(input: EveAttachmentErrorInput);
}
export {};