import type { Attachment, AttachmentType, ContentPart, ServiceName } from './types';
/**
 * Processes file attachments for multimodal LLM requests
 */
export declare class AttachmentProcessor {
    /**
     * Create an attachment from a file path (Node.js only)
     */
    static fromPath(filePath: string): Promise<Attachment>;
    /**
     * Create an attachment from a URL (for images that support URL references)
     */
    static fromUrl(url: string, type?: AttachmentType): Attachment;
    /**
     * Fetch a file from URL and create an attachment (Node.js and browser)
     * Useful for PDFs and images from remote URLs that need to be embedded
     */
    static fetchFromUrl(url: string): Promise<Attachment>;
    /**
     * Create an attachment from base64 data
     */
    static fromBase64(data: string, mimeType: string, type?: AttachmentType): Attachment;
    /**
     * Create an attachment from a Buffer
     */
    static fromBuffer(buffer: Buffer, mimeType: string, type?: AttachmentType): Attachment;
    /**
     * Convert an attachment to a ContentPart for a specific provider
     */
    static toContentPart(attachment: Attachment, provider: ServiceName): ContentPart;
    /**
     * Get the MIME type for a file extension
     */
    static getMimeType(extension: string): string | undefined;
    /**
     * Check if a MIME type is supported
     */
    static isSupportedMimeType(mimeType: string): boolean;
    /**
     * Check if a provider supports a specific attachment type
     */
    static isSupported(provider: ServiceName, attachmentType: AttachmentType): boolean;
}
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