import type { Prompt } from '../../types/Prompt';
import type { TODO_any } from '../../utils/organization/TODO_any';
/**
 * Builds AgentKit input items, including multimodal attachments.
 *
 * @private helper of `OpenAiAgentKitExecutionTools`
 */
export declare class OpenAiAgentKitExecutionToolsInputBuilder {
    /**
     * Builds AgentKit input items from the prompt and optional thread.
     */
    buildAgentKitInputItems(prompt: Prompt, rawPromptContent: string): Promise<Array<TODO_any>>;
    /**
     * Builds the user message content for AgentKit runs, including file inputs when provided.
     */
    private buildAgentKitUserContent;
    /**
     * Converts uploaded `File` objects into AgentKit `input_image` entries.
     */
    private createAgentKitInputImageItemsFromFiles;
    /**
     * Converts image chat attachments into AgentKit `input_image` entries.
     */
    private createAgentKitInputImageItemsFromAttachments;
    /**
     * Builds AgentKit user content that can include text, uploaded files, and image attachments.
     */
    private buildAgentKitUserContentWithAttachments;
    /**
     * Checks whether one chat attachment can be sent as an image input.
     */
    private isImageAttachment;
    /**
     * Returns one lowercase extension extracted from a filename/pathname.
     */
    private getLowercaseFilenameExtension;
    /**
     * Tries to extract one extension from URL pathname.
     */
    private getUrlPathnameExtension;
}