{
  "date": "2026-10-26",
  "runtime": "v24.22.1",
  "versions": {
    "node": "24.22.1",
    "acorn": "8.18.0",
    "ada": "4.0.0",
    "amaro": "1.1.11",
    "ares": "1.34.9",
    "brotli": "1.2.0",
    "cldr": "48.0",
    "icu": "78.3",
    "llhttp": "9.4.3",
    "merve": "1.2.2",
    "modules": "137",
    "napi": "10",
    "nbytes": "0.1.4",
    "ncrypto": "0.0.1",
    "nghttp2": "1.70.0",
    "nghttp3": "",
    "ngtcp2": "",
    "openssl": "3.5.9",
    "simdjson": "4.6.11",
    "simdutf": "6.4.0",
    "sqlite": "3.53.4",
    "tz": "2026e",
    "undici": "7.30.1",
    "unicode": "17.0",
    "uv": "1.52.1",
    "uvwasi": "0.0.23",
    "v8": "13.6.233.17-node.58",
    "zlib": "1.3.2.1-motley-285e94b",
    "zstd": "1.5.7"
  },
  "app_sha256": "b5b23e8c7028a1ee6ede9b41b459f5213af44661fc42f3d8c07b4a45f99c0644",
  "method": "Synthetic fixtures, not Claude samples. Actual homepage script in minimal DOM. Checkbox state and dash mode recorded in each row. Observations are fixture-specific, not general application tests.",
  "rows": [
    {
      "label": "Marked unit",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "kilo​meter",
      "output": "kilometer",
      "input_codepoints": "U+006B U+0069 U+006C U+006F U+200B U+006D U+0065 U+0074 U+0065 U+0072",
      "output_codepoints": "U+006B U+0069 U+006C U+006F U+006D U+0065 U+0074 U+0065 U+0072",
      "status": "Removed 1 invisible character",
      "before": {
        "error": "RangeError"
      },
      "after": {
        "formatted": "2 kilometers",
        "unit": "kilometer"
      }
    },
    {
      "label": "Valid unit",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "kilometer",
      "output": "kilometer",
      "input_codepoints": "U+006B U+0069 U+006C U+006F U+006D U+0065 U+0074 U+0065 U+0072",
      "output_codepoints": "U+006B U+0069 U+006C U+006F U+006D U+0065 U+0074 U+0065 U+0072",
      "status": "No selected invisible characters found",
      "before": {
        "formatted": "2 kilometers",
        "unit": "kilometer"
      },
      "after": {
        "formatted": "2 kilometers",
        "unit": "kilometer"
      }
    },
    {
      "label": "Display abbreviation",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "km",
      "output": "km",
      "input_codepoints": "U+006B U+006D",
      "output_codepoints": "U+006B U+006D",
      "status": "No selected invisible characters found",
      "before": {
        "error": "RangeError"
      },
      "after": {
        "error": "RangeError"
      }
    },
    {
      "label": "Compound unit",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "meter-per-second",
      "output": "meter-per-second",
      "input_codepoints": "U+006D U+0065 U+0074 U+0065 U+0072 U+002D U+0070 U+0065 U+0072 U+002D U+0073 U+0065 U+0063 U+006F U+006E U+0064",
      "output_codepoints": "U+006D U+0065 U+0074 U+0065 U+0072 U+002D U+0070 U+0065 U+0072 U+002D U+0073 U+0065 U+0063 U+006F U+006E U+0064",
      "status": "No selected invisible characters found",
      "before": {
        "formatted": "2 meters per second",
        "unit": "meter-per-second"
      },
      "after": {
        "formatted": "2 meters per second",
        "unit": "meter-per-second"
      }
    }
  ]
}