import type { ScreenshotResult } from "../types.js";
export interface SemanticComparisonOptions {
    readonly viewport?: {
        readonly width: number;
        readonly height: number;
    };
}
export interface SemanticComparisonResult {
    readonly beforeScreenshot: ScreenshotResult;
    readonly afterScreenshot: ScreenshotResult;
    readonly diffImage: string;
    readonly differencePercent: number;
    readonly pixelsChanged: number;
    readonly dimensions: {
        readonly width: number;
        readonly height: number;
    };
    readonly methodology: string;
    readonly changeDescription: string;
    readonly urlBefore: string;
    readonly urlAfter: string;
}
/**
 * Generate a detailed methodology prompt that tells Claude exactly
 * how to analyze before/after screenshots for semantic correctness.
 */
export declare function buildComparisonMethodology(changeDescription: string, diffPercent: number): string;
/**
 * Capture before/after screenshots, compute pixel diff, and generate
 * a structured methodology prompt for Claude's vision to perform
 * semantic comparison of the UI changes.
 *
 * This does NOT call an external AI API — it structures the output so
 * the calling Claude instance can do the semantic analysis using its
 * own vision capabilities.
 */
export declare function captureSemanticComparison(urlBefore: string, urlAfter: string, changeDescription: string, options?: SemanticComparisonOptions): Promise<SemanticComparisonResult>;
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