// Body for playwright browser_evaluate: () => { ...this content... }
// Loads axe-core 4.x from CDN (skips if already present), runs WCAG A/AA scan.
return (async () => {
  if (!window.axe) {
    await new Promise((resolve, reject) => {
      const s = document.createElement('script');
      s.src = 'https://cdn.jsdelivr.net/npm/axe-core@4.10.2/axe.min.js';
      s.onload = resolve;
      s.onerror = () => reject(new Error('axe failed to load'));
      document.head.appendChild(s);
    });
  }
  const results = await window.axe.run(document, {
    runOnly: { type: 'tag', values: ['wcag2a', 'wcag2aa', 'wcag21a', 'wcag21aa', 'wcag22aa'] }
  });
  return {
    url: location.pathname,
    violationCount: results.violations.length,
    violations: results.violations.map(v => ({
      id: v.id,
      impact: v.impact,
      description: v.help,
      nodes: v.nodes.length,
      sampleTargets: v.nodes.slice(0, 3).map(n => n.target.join(' '))
    }))
  };
})();