/**
 * Snapshot Diffing & Annotation
 *
 * Produces unified text diffs of accessibility tree snapshots
 * and annotated screenshots with ref labels.
 */
type Page = import('playwright').Page;
import type { RefMap } from './refs.js';
/**
 * Produce a unified diff between baseline and current accessibility snapshots.
 * Shows added (+), removed (-), and unchanged lines.
 */
export declare function diffSnapshots(baseline: RefMap, current: RefMap): string;
/**
 * Take an annotated screenshot with ref labels overlaid on elements.
 * Injects temporary overlay divs, captures screenshot, then removes them.
 *
 * - Captures the full page so annotations below the fold are visible.
 * - Skips elements with zero bounding-box (avoids stray labels at 0,0).
 * - Positions labels above the element (or below if at the page top),
 *   uses absolute (document-relative) coordinates so they line up in
 *   the full-page image.
 */
export declare function annotateScreenshot(page: Page, refMap: RefMap): Promise<Buffer>;
export {};
//# sourceMappingURL=diff.d.ts.map