import type { ChatOptions } from '../core/agent/moss-agent-types.js';
export type PromptAttachmentBlock = NonNullable<ChatOptions['attachments']>[number];
export interface PreparedPromptAttachment {
    index: number;
    kind: 'image' | 'file';
    path: string;
    label: string;
    filename: string;
    mimeType: string;
    bytes: number;
}
export interface PreparePromptAttachmentsOptions {
    cwd?: string;
    startIndex?: number;
}
export interface PreparePromptAttachmentsResult {
    attachments: PreparedPromptAttachment[];
    blocks: PromptAttachmentBlock[];
    warnings: string[];
}
/**
 * Detect the actual image type from file magic bytes. Returns the real MIME
 * (which wins over the extension-implied one) or null when the bytes are not
 * a supported image. @internal exported for tests.
 */
export declare function detectImageMime(buffer: Buffer): string | null;
export declare function parseAttachArgs(input: string): string[];
export declare function preparePromptAttachments(values: string[], options?: PreparePromptAttachmentsOptions): PreparePromptAttachmentsResult;
export declare function renderPendingAttachmentSummary(attachments: PreparedPromptAttachment[]): string;
//# sourceMappingURL=attachments.d.ts.map