import type { Attachment } from "../core/types.js";
/** Options for {@link resolveAttachments}. */
export interface ResolveAttachmentsOptions {
    /**
     * If set, attachment paths must resolve within this directory.
     * Prevents path traversal via `..` segments and sibling-directory
     * prefix matches. Opt-in only.
     *
     * Note: this check uses `node:path` `resolve()`, which does NOT
     * dereference symlinks. A symlink located inside `basePath` that
     * points outside of it will pass this check. If symlink traversal is
     * a concern, resolve paths with `fs.realpath()` before passing them in.
     */
    basePath?: string;
}
/**
 * Resolve attachment.path to in-memory Uint8Array content.
 * @throws When attachment.path is used on runtimes without node:fs/promises
 */
export declare function resolveAttachments(attachments: Attachment[] | undefined, options?: ResolveAttachmentsOptions): Promise<Attachment[]>;