{
  "date": "2026-10-09",
  "runtime": "v24.19.0",
  "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": "Marker inside literal",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{\"n\":1​2}",
      "output": "{\"n\":12}",
      "input_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+0031 U+200B U+0032 U+007D",
      "output_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+0031 U+0032 U+007D",
      "status": "Removed 1 invisible character",
      "before": {
        "accepted": false,
        "errorName": "SyntaxError"
      },
      "after": {
        "accepted": true,
        "value": 12,
        "type": "number"
      }
    },
    {
      "label": "Numeric separator",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{\"n\":1_000}",
      "output": "{\"n\":1_000}",
      "input_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+0031 U+005F U+0030 U+0030 U+0030 U+007D",
      "output_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+0031 U+005F U+0030 U+0030 U+0030 U+007D",
      "status": "No selected invisible characters found",
      "before": {
        "accepted": false,
        "errorName": "SyntaxError"
      },
      "after": {
        "accepted": false,
        "errorName": "SyntaxError"
      }
    },
    {
      "label": "Leading plus",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{\"n\":+12}",
      "output": "{\"n\":+12}",
      "input_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+002B U+0031 U+0032 U+007D",
      "output_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+002B U+0031 U+0032 U+007D",
      "status": "No selected invisible characters found",
      "before": {
        "accepted": false,
        "errorName": "SyntaxError"
      },
      "after": {
        "accepted": false,
        "errorName": "SyntaxError"
      }
    },
    {
      "label": "Exponent reference",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{\"n\":1e3}",
      "output": "{\"n\":1e3}",
      "input_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+0031 U+0065 U+0033 U+007D",
      "output_codepoints": "U+007B U+0022 U+006E U+0022 U+003A U+0031 U+0065 U+0033 U+007D",
      "status": "No selected invisible characters found",
      "before": {
        "accepted": true,
        "value": 1000,
        "type": "number"
      },
      "after": {
        "accepted": true,
        "value": 1000,
        "type": "number"
      }
    }
  ]
}