{
  "kind": "baseline-checks",
  "exportVersion": "1",
  "scenario": {
    "id": "frontend-aesthetic",
    "version": "1.0.0"
  },
  "contractHash": "sha256:ec7629d3c0a40e081293b5ff99c018f1ecc459a4f79206f1a223e0bdd9b0006b",
  "severities": {
    "fatal": "the floor fails and the page is eliminated",
    "severe": "the floor fails; the failure is marked on the card",
    "minor": "recorded only; never fails the floor",
    "flag": "a result value, not a severity: noted for review, never counted as a failure"
  },
  "floorRule": "a page passes the floor when no fatal or severe check fails",
  "checks": [
    {
      "id": "fe.no-output",
      "version": "1",
      "severity": "fatal",
      "summary": "The agent produced no page: out/index.html is missing.",
      "rule": [
        "fail when out/index.html does not exist after the run"
      ],
      "selfTest": [
        {
          "injector": "fi.delete-entry",
          "intensity": 1,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.blank-page",
      "version": "1",
      "severity": "fatal",
      "summary": "The page renders as blank on some viewport.",
      "rule": [
        "fail when a viewport shows fewer than 20 characters of visible text and images/painted areas cover under 5% of the page",
        "or when the first-screen and full-page screenshots are ≥ 99.8% a single background colour"
      ],
      "selfTest": [
        {
          "injector": "fi.blank",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.blank",
          "intensity": 2,
          "expect": "fail"
        },
        {
          "injector": "fi.blank",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.horizontal-scroll",
      "version": "1",
      "severity": "severe",
      "summary": "The page scrolls sideways at a contract viewport.",
      "rule": [
        "fail when document scrollWidth exceeds clientWidth by more than 1 px at 1440x900 or 390x844 (unless the root clips x-overflow)",
        "flag only (not counted) when it happens only at the extra scan widths 320, 768, 1024 px; the first failing width is reported"
      ],
      "selfTest": [
        {
          "injector": "fi.wide-element",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.wide-element",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.text-overflow",
      "version": "2",
      "severity": "severe",
      "summary": "Content text is cut off by its container.",
      "rule": [
        "fail when a text block with letters or digits (≥ 2 non-space characters) is clipped by an overflow:hidden/clip ancestor",
        "ignored: aria-hidden and svg text, rotated/skewed text, collapsed <details> / content-visibility:hidden, symbol-only text, layers mirroring a scroll pane (editor gutters)",
        "ellipsis truncation is a flag, not a failure"
      ],
      "selfTest": [
        {
          "injector": "fi.text-clip",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.text-clip",
          "intensity": 2,
          "expect": "fail"
        },
        {
          "injector": "fi.text-clip",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.overlap",
      "version": "2",
      "severity": "severe",
      "summary": "Readable text overlaps other text or is covered by an opaque element.",
      "rule": [
        "text-on-text overlap of at least 4×4 px, only the part inside its clipping containers",
        "covered: at least 2 sample points of a text (1 when it has only one) are under an opaque element (image, video, iframe, form control, opaque background); svg graphics are not opaque covers",
        "ignored: aria-hidden / svg text, rotated text, collapsed content, symbol-only text"
      ],
      "selfTest": [
        {
          "injector": "fi.overlap",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.overlap",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.contrast",
      "version": "2",
      "severity": "severe",
      "summary": "Main text is unreadable against its background (not mere WCAG AA misses).",
      "rule": [
        "faint = below 3:1 (large text 2:1); illegible = below 2:1 (large text 1.5:1); ratios from axe-core",
        "fail on a viewport when faint text is ≥ 50% of the readable characters",
        "or illegible text is ≥ 10% of the readable characters or ≥ 200 characters",
        "readable = visible text with letters or digits plus text shown in form fields; aria-hidden, svg, disabled controls and symbols excluded",
        "flag when contrast could not be measured"
      ],
      "selfTest": [
        {
          "injector": "fi.low-contrast",
          "intensity": 2,
          "expect": "fail"
        },
        {
          "injector": "fi.low-contrast",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.contrast-aa",
      "version": "1",
      "severity": "minor",
      "summary": "Some readable text is below the WCAG AA contrast ratio (recorded, never vetoes).",
      "rule": [
        "fail (minor) when any readable text is below 4.5:1 (large text 3:1); the detail gives the largest share and the lowest ratio"
      ],
      "selfTest": [
        {
          "injector": "fi.low-contrast",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.low-contrast",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.broken-image",
      "version": "1",
      "severity": "severe",
      "summary": "An image on the page failed to load or has no source.",
      "rule": [
        "fail when a displayed <img> has an empty src, or finished loading with naturalWidth 0 (lazy images not yet loaded are skipped)"
      ],
      "selfTest": [
        {
          "injector": "fi.break-image",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.break-image",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.required-sections",
      "version": "1",
      "severity": "severe",
      "summary": "A section the task card requires is not on the page.",
      "rule": [
        "fail when any of the card's requiredSections is not found on some viewport (matched by data-section, then id, then the words of the name in the attributes / text of sections, landmarks, headings, with synonyms)",
        "pass when the card requires none"
      ],
      "selfTest": [
        {
          "injector": "fi.remove-section",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.remove-section",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.fabrication",
      "version": "1",
      "severity": "minor",
      "summary": "Heuristic marker for invented content when the card supplies fixed copy.",
      "rule": [
        "fail (minor) when a section the card withholds appears",
        "or, when the card has inline content: a quotation of 25+ characters not supported by the card text (≥ 80% of its words), or ≥ 2 numbers not in the card (years 1990–2035 and integers under 10 ignored)"
      ],
      "selfTest": [
        {
          "injector": "fi.fabricate",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.fabricate",
          "intensity": 2,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.console-errors",
      "version": "2",
      "severity": "severe",
      "summary": "The page's own scripts throw or log errors.",
      "rule": [
        "fail on an uncaught page exception or a console.error from the page",
        "not counted (browser notices, network): /Failed to load resource|net::ERR_|Blocked script execution in .* sandboxed|frame is sandboxed|^\\[Violation\\]|favicon\\.ico/i"
      ],
      "selfTest": [
        {
          "injector": "fi.script-error",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.script-error",
          "intensity": 2,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.external-requests",
      "version": "1",
      "severity": "severe",
      "summary": "The page tries to reach the network (rendering is offline).",
      "rule": [
        "fail when any request outside the local static server was blocked, or a page file (HTML, CSS, JS) references an external URL"
      ],
      "selfTest": [
        {
          "injector": "fi.external-ref",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.external-ref",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.font-fallback",
      "version": "1",
      "severity": "minor",
      "summary": "Text asks for a font the pinned font pack cannot provide.",
      "rule": [
        "fail (minor) when the first family of a font stack used by ≥ 10 characters is neither in the font pack, its alias table, a generic family, nor a loaded @font-face"
      ],
      "selfTest": [
        {
          "injector": "fi.unknown-font",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.unknown-font",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    },
    {
      "id": "fe.small-text",
      "version": "2",
      "severity": "minor",
      "summary": "Readable text set below the minimum size.",
      "rule": [
        "fail (minor) when a non-decorative text block of ≥ 20 characters is under 12 px"
      ],
      "selfTest": [
        {
          "injector": "fi.tiny-text",
          "intensity": 1,
          "expect": "fail"
        },
        {
          "injector": "fi.tiny-text",
          "intensity": 3,
          "expect": "fail"
        }
      ]
    }
  ]
}