import type { MediaDimensionBounds } from './aspectRatio.js';
export type GptImageQuality = 'low' | 'medium' | 'high' | 'xhigh' | 'max';
export type GptImageQualityArg = GptImageQuality;
export type ImageOutputFormat = 'png' | 'jpg' | 'webp';
export declare const GPT_IMAGE_MODEL_KEY = "gpt-image-2";
export declare const GPT_IMAGE_MODEL_IDS: readonly ["gpt-image-2", "gpt-image-2.5-sunburst", "gpt-image-2.5-flare"];
export type GptImageModelId = (typeof GPT_IMAGE_MODEL_IDS)[number];
export declare const GPT_IMAGE_25_SUNBURST_MODEL_KEY = "gpt-image-2.5-sunburst";
export declare const GPT_IMAGE_25_FLARE_MODEL_KEY = "gpt-image-2.5-flare";
export declare function isGptImageModel(value: unknown): value is GptImageModelId;
export declare function isGptImage25Model(value: unknown): boolean;
export declare function getGptImageCapabilities(modelId: GptImageModelId): {
    modelId: "gpt-image-2" | "gpt-image-2.5-sunburst" | "gpt-image-2.5-flare";
    qualities: readonly GptImageQuality[];
    defaultQuality: "medium";
    supportsTransparency: boolean;
    outputFormats: readonly ["png", "jpg", "webp"];
    dimensionStep: number;
    experimentalAbovePixels: number;
};
export declare const GPT_IMAGE_MIN_PIXELS = 655360;
export declare const GPT_IMAGE_MAX_PIXELS = 8294400;
export declare const GPT_IMAGE_DIMENSION_BOUNDS: MediaDimensionBounds;
export declare const GPT_IMAGE_QUALITY_BY_TIER: Record<string, GptImageQuality>;
export declare const GPT_IMAGE_MODEL_ALIASES: ReadonlySet<string>;
export declare function normalizeGptImageModelAlias(value: unknown): string | undefined;
export declare function textRequestsGptImage2ImageModel(text: string): boolean;
export declare function isNegatedImageModelMention(text: string, index: number): boolean;
export declare function textExplicitlyAvoidsGptImageModel(text: string): boolean;
export declare function textExplicitlyRequestsNonGptImageModel(text: string): boolean;
export declare function textSuggestsGptImage2DefaultImageModel(text: string): boolean;
export declare function textRequestedGptImage25Variant(text: string | null | undefined): typeof GPT_IMAGE_25_SUNBURST_MODEL_KEY | typeof GPT_IMAGE_25_FLARE_MODEL_KEY | 'unspecified' | null;
export declare function getGptImage2ModelOverride(toolName: string, currentModel: unknown, latestUserText: string): string | null;
export declare function normalizeGptImageQuality(value: unknown, modelId?: GptImageModelId): GptImageQualityArg | undefined;
export declare function normalizeImageOutputFormat(value: unknown): ImageOutputFormat | undefined;
export declare const GPT_IMAGE_HIGH_DETAIL_SHORT_SIDE = 1440;
export declare function promptNeedsHighDetailGptImage(prompt: string | null | undefined): boolean;
export declare function getGptImageRequestOptions(args: Record<string, unknown>, modelId: string): {
    gptImageBackground?: 'auto' | 'opaque' | 'transparent';
    gptImageOutputCompression?: number;
    gptImageMaskUrl?: string;
};
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