import type OpenAI from 'openai';
import { type AssistantContentPart, type MessageContent } from '@use-crux/core';
type OpenAIContentPart = OpenAI.ChatCompletionContentPart;
/** Encode canonical Crux message content into OpenAI chat-completion content. */
export declare function openAIMessageContent(role: 'system' | 'assistant', content: string | readonly AssistantContentPart[]): string;
export declare function openAIMessageContent(role: 'user', content: MessageContent): string | OpenAIContentPart[];
/** Decode an OpenAI chat content payload into canonical Crux content. */
export declare function messageContentFromOpenAIContent(content: unknown): MessageContent;
/** Text projection for decoded OpenAI content payloads. */
export declare function openAIContentText(content: unknown): string;
export {};