import type { AgentChatAttachment } from "../agent/types.js";
import type { Part } from "./types.js";
/**
 * Turn the URL file parts of an inbound A2A message into chat attachments, so
 * a delegated turn reads them through the same pipeline as a chat upload.
 * Parts that cannot be fetched are named in `unreadable` rather than dropped.
 */
export declare function a2aFilePartsToAttachments(parts: readonly Part[]): {
    attachments: AgentChatAttachment[];
    unreadable: string[];
};