import type { MaterializedInputAttachment, RunInputAttachment } from "./types.js";
export type InputAttachmentErrorCode = "attachment_download_failed" | "attachment_download_timeout" | "attachment_read_failed" | "attachment_verification_failed";
export declare class InputAttachmentMaterializationError extends Error {
    readonly code: InputAttachmentErrorCode;
    constructor(message: string, code: InputAttachmentErrorCode, options?: ErrorOptions);
}
export interface InputAttachmentGrant {
    downloads: Array<{
        attachmentId: string;
        downloadUrl: string;
    }>;
}
export declare function materializeInputAttachments(workspaceDir: string, attachments: RunInputAttachment[], grant: InputAttachmentGrant, signal: AbortSignal): Promise<MaterializedInputAttachment[]>;