import type { ImageContent, Model, TextContent } from "../types";
export declare const NON_VISION_IMAGE_PLACEHOLDER = "[image omitted: model does not support vision]";
export declare function partitionVisionContent(content: ReadonlyArray<TextContent | ImageContent>, supportsImages: boolean): {
    textBlocks: TextContent[];
    imageBlocks: ImageContent[];
    omittedImages: boolean;
};
export declare function joinTextWithImagePlaceholder(text: string, omittedImages: boolean): string;
/**
 * Detect known text-only Qwen models served via Alibaba DashScope's consumer
 * `compatible-mode` endpoint that the upstream chat-completions API rejects
 * multimodal content arrays for. The compatible-mode endpoint also serves
 * multimodal Qwen SKUs without `vl` in the id (e.g. `qwen3.7-plus`), so this
 * guard only covers families verified to be text-only for issue #1859:
 * `qwen*-max` and `qwen*-coder*`.
 *
 * Used as a defensive override in `convertMessages` so a misconfigured custom
 * provider (issue #1859) can't drive the request into an unrecoverable 400.
 */
export declare function isDashscopeCompatibleModeTextOnlyQwen(model: Model<"openai-completions">): boolean;