import type { Attachment, ContentPart } from './types.js';
export declare class DocumentAttachment {
    private readonly _data;
    private readonly _mimeType;
    private readonly _name?;
    private constructor();
    /** Create from raw string content */
    static fromString(content: string, name?: string): DocumentAttachment;
    /** Create from a base64 string */
    static fromBase64(base64: string, mimeType: string, name?: string): DocumentAttachment;
    /** Create from a URL (fetches the content) */
    static fromUrl(url: string): Promise<DocumentAttachment>;
    toAttachment(): Attachment;
    toContentPart(): ContentPart;
}
export declare class ImageAttachment {
    private readonly _data;
    private readonly _mimeType;
    private constructor();
    /** Create from a base64 string */
    static fromBase64(base64: string, mimeType: string): ImageAttachment;
    /** Create from a URL (fetches the image) */
    static fromUrl(url: string): Promise<ImageAttachment>;
    toAttachment(): Attachment;
    toContentPart(): ContentPart;
}
/** Convert attachments to ContentPart[] for building a user message */
export declare function attachmentsToContentParts(attachments: Attachment[]): ContentPart[];
/** Get text content from a message (handles both string and ContentPart[] content) */
export declare function getMessageText(content: string | ContentPart[]): string;
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