{
  "date": "2026-10-10",
  "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": "Marked initial key",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "a​=1&aa=2",
      "output": "a=1&aa=2",
      "input_codepoints": "U+0061 U+200B U+003D U+0031 U+0026 U+0061 U+0061 U+003D U+0032",
      "output_codepoints": "U+0061 U+003D U+0031 U+0026 U+0061 U+0061 U+003D U+0032",
      "status": "Removed 1 invisible character",
      "before": {
        "entries": [
          [
            "aa",
            "2"
          ],
          [
            "a​",
            "1"
          ]
        ],
        "serialized": "aa=2&a%E2%80%8B=1"
      },
      "after": {
        "entries": [
          [
            "a",
            "1"
          ],
          [
            "aa",
            "2"
          ]
        ],
        "serialized": "a=1&aa=2"
      }
    },
    {
      "label": "Plain initial key",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "a=1&aa=2",
      "output": "a=1&aa=2",
      "input_codepoints": "U+0061 U+003D U+0031 U+0026 U+0061 U+0061 U+003D U+0032",
      "output_codepoints": "U+0061 U+003D U+0031 U+0026 U+0061 U+0061 U+003D U+0032",
      "status": "No selected invisible characters found",
      "before": {
        "entries": [
          [
            "a",
            "1"
          ],
          [
            "aa",
            "2"
          ]
        ],
        "serialized": "a=1&aa=2"
      },
      "after": {
        "entries": [
          [
            "a",
            "1"
          ],
          [
            "aa",
            "2"
          ]
        ],
        "serialized": "a=1&aa=2"
      }
    },
    {
      "label": "Duplicate keys",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "a=1&a=2",
      "output": "a=1&a=2",
      "input_codepoints": "U+0061 U+003D U+0031 U+0026 U+0061 U+003D U+0032",
      "output_codepoints": "U+0061 U+003D U+0031 U+0026 U+0061 U+003D U+0032",
      "status": "No selected invisible characters found",
      "before": {
        "entries": [
          [
            "a",
            "1"
          ],
          [
            "a",
            "2"
          ]
        ],
        "serialized": "a=1&a=2"
      },
      "after": {
        "entries": [
          [
            "a",
            "1"
          ],
          [
            "a",
            "2"
          ]
        ],
        "serialized": "a=1&a=2"
      }
    },
    {
      "label": "Retained joiner",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "a‍=1&aa=2",
      "output": "a‍=1&aa=2",
      "input_codepoints": "U+0061 U+200D U+003D U+0031 U+0026 U+0061 U+0061 U+003D U+0032",
      "output_codepoints": "U+0061 U+200D U+003D U+0031 U+0026 U+0061 U+0061 U+003D U+0032",
      "status": "No selected invisible characters found",
      "before": {
        "entries": [
          [
            "aa",
            "2"
          ],
          [
            "a‍",
            "1"
          ]
        ],
        "serialized": "aa=2&a%E2%80%8D=1"
      },
      "after": {
        "entries": [
          [
            "aa",
            "2"
          ],
          [
            "a‍",
            "1"
          ]
        ],
        "serialized": "aa=2&a%E2%80%8D=1"
      }
    }
  ]
}