{
  "date": "2026-10-12",
  "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 percent escape",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "%4​1",
      "output": "%41",
      "input_codepoints": "U+0025 U+0034 U+200B U+0031",
      "output_codepoints": "U+0025 U+0034 U+0031",
      "status": "Removed 1 invisible character",
      "before": {
        "accepted": false,
        "errorName": "URIError"
      },
      "after": {
        "accepted": true,
        "decoded": "A"
      }
    },
    {
      "label": "Incomplete escape",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "%4",
      "output": "%4",
      "input_codepoints": "U+0025 U+0034",
      "output_codepoints": "U+0025 U+0034",
      "status": "No selected invisible characters found",
      "before": {
        "accepted": false,
        "errorName": "URIError"
      },
      "after": {
        "accepted": false,
        "errorName": "URIError"
      }
    },
    {
      "label": "Invalid UTF8 escape",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "%FF",
      "output": "%FF",
      "input_codepoints": "U+0025 U+0046 U+0046",
      "output_codepoints": "U+0025 U+0046 U+0046",
      "status": "No selected invisible characters found",
      "before": {
        "accepted": false,
        "errorName": "URIError"
      },
      "after": {
        "accepted": false,
        "errorName": "URIError"
      }
    },
    {
      "label": "Valid encoded marker",
      "stage": "direct string",
      "mode": "keep",
      "enabled": true,
      "input": "%E2%80%8B",
      "output": "%E2%80%8B",
      "input_codepoints": "U+0025 U+0045 U+0032 U+0025 U+0038 U+0030 U+0025 U+0038 U+0042",
      "output_codepoints": "U+0025 U+0045 U+0032 U+0025 U+0038 U+0030 U+0025 U+0038 U+0042",
      "status": "No selected invisible characters found",
      "before": {
        "accepted": true,
        "decoded": "​"
      },
      "after": {
        "accepted": true,
        "decoded": "​"
      }
    }
  ]
}