import type { ImgAltResult, RuleInput } from '../types.js';
export type ImgAltViolation = {
    src: string;
    alt: string | null;
    reason: 'missing' | 'empty' | 'filename';
};
/**
 * Validates that all <img> elements have appropriate alt attributes.
 *
 * Checks:
 * 1. alt attribute must be present (missing = fail)
 * 2. Decorative images (alt="") are allowed
 * 3. alt text must not be just a filename (e.g., "photo.jpg")
 *
 * Pass: all img elements have alt attributes that aren't bare filenames
 * Fail: any img missing alt, or using a filename as alt text
 */
export declare function checkImgAlt(input: RuleInput): ImgAltResult;
//# sourceMappingURL=img-alt.d.ts.map