{
  "date": "2026-10-07",
  "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": "Curly delimiters",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{“x”:1}",
      "output": "{“x”:1}",
      "input_codepoints": "U+007B U+201C U+0078 U+201D U+003A U+0031 U+007D",
      "output_codepoints": "U+007B U+201C U+0078 U+201D U+003A U+0031 U+007D",
      "status": "No selected invisible characters found",
      "before": {
        "valid": false,
        "errorName": "SyntaxError"
      },
      "after": {
        "valid": false,
        "errorName": "SyntaxError"
      }
    },
    {
      "label": "Curly content",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{\"x\":\"“hello”\"}",
      "output": "{\"x\":\"“hello”\"}",
      "input_codepoints": "U+007B U+0022 U+0078 U+0022 U+003A U+0022 U+201C U+0068 U+0065 U+006C U+006C U+006F U+201D U+0022 U+007D",
      "output_codepoints": "U+007B U+0022 U+0078 U+0022 U+003A U+0022 U+201C U+0068 U+0065 U+006C U+006C U+006F U+201D U+0022 U+007D",
      "status": "No selected invisible characters found",
      "before": {
        "valid": true,
        "value": {
          "x": "“hello”"
        }
      },
      "after": {
        "valid": true,
        "value": {
          "x": "“hello”"
        }
      }
    },
    {
      "label": "Curly delimiters plus marker",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{“x”:​1}",
      "output": "{“x”:1}",
      "input_codepoints": "U+007B U+201C U+0078 U+201D U+003A U+200B U+0031 U+007D",
      "output_codepoints": "U+007B U+201C U+0078 U+201D U+003A U+0031 U+007D",
      "status": "Removed 1 invisible character",
      "before": {
        "valid": false,
        "errorName": "SyntaxError"
      },
      "after": {
        "valid": false,
        "errorName": "SyntaxError"
      }
    },
    {
      "label": "ASCII delimiters",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "{\"x\":1}",
      "output": "{\"x\":1}",
      "input_codepoints": "U+007B U+0022 U+0078 U+0022 U+003A U+0031 U+007D",
      "output_codepoints": "U+007B U+0022 U+0078 U+0022 U+003A U+0031 U+007D",
      "status": "No selected invisible characters found",
      "before": {
        "valid": true,
        "value": {
          "x": 1
        }
      },
      "after": {
        "valid": true,
        "value": {
          "x": 1
        }
      }
    }
  ]
}