import { lowerImagePrompt, type ImagePrompt, type StreamImageOptions } from "@use-crux/core";
import type { OpenAIImageExtra } from "./image-generation";
/** OpenAI controls accepted by native Images API streaming. */
export interface OpenAIImageStreamExtra extends OpenAIImageExtra {
    /**
     * Number of complete provisional images requested from OpenAI.
     *
     * OpenAI may return fewer previews when the final image completes first.
     * @defaultValue 0
     */
    readonly partial_images?: 0 | 1 | 2 | 3 | null;
}
export type OpenAIImageStreamInput = StreamImageOptions<string, OpenAIImageStreamExtra, ImagePrompt>;
export type NormalizedOpenAIImageStream = Readonly<{
    options: OpenAIImageStreamInput;
    prompt: Awaited<ReturnType<typeof lowerImagePrompt>>;
}>;
/** Validate and lower one portable image-stream request without provider I/O. */
export declare function normalizeOpenAIImageStream(input: OpenAIImageStreamInput, model: string): Promise<NormalizedOpenAIImageStream>;
/** Return whether the installed Images API can honestly stream this request. */
export declare function supportsOpenAIImageStream({ options, prompt, }: NormalizedOpenAIImageStream): boolean;