{
  "date": "2026-10-05",
  "runtime": "v24.19.0",
  "app_sha256": "b5b23e8c7028a1ee6ede9b41b459f5213af44661fc42f3d8c07b4a45f99c0644",
  "method": "Synthetic fixtures, not Claude samples. Actual homepage script in minimal DOM. Invisible checkbox on; dash Keep unless matrix says otherwise. Observations are fixture-specific, not general application tests.",
  "rows": [
    {
      "label": "Literal pattern",
      "stage": "direct string",
      "mode": "keep",
      "input": "^A​B$",
      "output": "^AB$",
      "input_codepoints": "U+005E U+0041 U+200B U+0042 U+0024",
      "output_codepoints": "U+005E U+0041 U+0042 U+0024",
      "status": "Removed 1 invisible character",
      "before": {
        "source": "^A​B$",
        "matchesAB": false,
        "matchesHidden": true
      },
      "after": {
        "source": "^AB$",
        "matchesAB": true,
        "matchesHidden": false
      }
    },
    {
      "label": "Written escape",
      "stage": "direct string",
      "mode": "keep",
      "input": "^A\\u200BB$",
      "output": "^A\\u200BB$",
      "input_codepoints": "U+005E U+0041 U+005C U+0075 U+0032 U+0030 U+0030 U+0042 U+0042 U+0024",
      "output_codepoints": "U+005E U+0041 U+005C U+0075 U+0032 U+0030 U+0030 U+0042 U+0042 U+0024",
      "status": "No selected invisible characters found",
      "before": {
        "source": "^A\\u200BB$",
        "matchesAB": false,
        "matchesHidden": true
      },
      "after": {
        "source": "^A\\u200BB$",
        "matchesAB": false,
        "matchesHidden": true
      }
    },
    {
      "label": "Baseline pattern",
      "stage": "direct string",
      "mode": "keep",
      "input": "^AB$",
      "output": "^AB$",
      "input_codepoints": "U+005E U+0041 U+0042 U+0024",
      "output_codepoints": "U+005E U+0041 U+0042 U+0024",
      "status": "No selected invisible characters found",
      "before": {
        "source": "^AB$",
        "matchesAB": true,
        "matchesHidden": false
      },
      "after": {
        "source": "^AB$",
        "matchesAB": true,
        "matchesHidden": false
      }
    }
  ]
}