import type { ResolvedImageInput } from './types.js';
export declare function resolveImageInputs(raw: string[] | undefined, cwd: string, fetchImpl: typeof fetch, signal?: AbortSignal): Promise<ResolvedImageInput[]>;
export declare function sniffMime(bytes: Uint8Array): string | undefined;
export declare function toDataUri(input: ResolvedImageInput): string;
/**
 * Classify a string returned by an image-generation API as either a URL the
 * caller should fetch, or base64 image bytes the caller already has.
 *
 * Different providers / gateways return image output in different shapes:
 *   - http(s):// URL       → fetch it
 *   - `data:image/...;base64,...`  → strip prefix, decode bytes
 *   - bare base64 string (PNG/JPEG/WebP/GIF magic bytes) → decode bytes
 *   - empty / whitespace   → invalid, return null
 *
 * Returning `null` lets adapters skip junk entries (e.g. when a provider's
 * response had `text` parts but no actual image).
 */
export declare function classifyImageOutput(value: string | undefined | null): {
    kind: 'url';
    url: string;
} | {
    kind: 'base64';
    bytes: string;
    mimeType: string;
} | null;
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