{
  "benchmark": "WhatsApp export parser compatibility benchmark",
  "version": "2026.07",
  "published": "2026-07-13",
  "data_policy": "Synthetic fixtures only. No customer or private chat data.",
  "cases": [
    {"id":"timestamp-ios-yyyy-slash","category":"timestamp","locale":"iOS YYYY/MM/DD","input":"[2024/07/09, 08:01:49] Researcher: Morning","expected":{"messageCount":1,"sender":"Researcher","text":"Morning","year":2024,"month":7,"day":9,"hour":8,"minute":1,"type":"text"}},
    {"id":"timestamp-ios-iso-ampm","category":"timestamp","locale":"iOS ISO with AM/PM","input":"[2026-03-02, 6:39:22 PM] Researcher: Evening","expected":{"messageCount":1,"sender":"Researcher","text":"Evening","year":2026,"month":3,"day":2,"hour":18,"minute":39,"type":"text"}},
    {"id":"timestamp-cjk-marker","category":"timestamp","locale":"CJK AM/PM before time","input":"[15/3/24 下午 2:30:45] Researcher: 你好","expected":{"messageCount":1,"sender":"Researcher","text":"你好","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-ios-slash","category":"timestamp","locale":"iOS slash date","input":"[3/15/24, 2:30:45 PM] Researcher: Hello","expected":{"messageCount":1,"sender":"Researcher","text":"Hello","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-android-slash","category":"timestamp","locale":"Android slash date","input":"3/15/24, 2:30 PM - Researcher: Hello","expected":{"messageCount":1,"sender":"Researcher","text":"Hello","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-european-dotted","category":"timestamp","locale":"European dotted","input":"15.03.2024, 14:30 - Researcher: Guten Tag","expected":{"messageCount":1,"sender":"Researcher","text":"Guten Tag","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-european-bracketed","category":"timestamp","locale":"European dotted bracketed","input":"[15.11.2013, 06:59:19] Researcher: Hallo","expected":{"messageCount":1,"sender":"Researcher","text":"Hallo","year":2013,"month":11,"day":15,"hour":6,"minute":59,"type":"text"}},
    {"id":"timestamp-european-short-year","category":"timestamp","locale":"European dotted short year","input":"15.11.13, 06:59 - Researcher: Hallo","expected":{"messageCount":1,"sender":"Researcher","text":"Hallo","year":2013,"month":11,"day":15,"hour":6,"minute":59,"type":"text"}},
    {"id":"timestamp-brazilian","category":"timestamp","locale":"Brazilian DD/MM/YYYY","input":"15/03/2024 14:30 - Researcher: Olá","expected":{"messageCount":1,"sender":"Researcher","text":"Olá","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-dutch","category":"timestamp","locale":"Dutch DD-MM-YYYY","input":"15-03-2024 14:30 - Researcher: Hoi","expected":{"messageCount":1,"sender":"Researcher","text":"Hoi","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-dutch-bracketed","category":"timestamp","locale":"Dutch bracketed","input":"[15-03-2024, 14:30:01] Researcher: Hoi","expected":{"messageCount":1,"sender":"Researcher","text":"Hoi","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-spanish-short-year","category":"timestamp","locale":"Spanish short year","input":"[24-03-15, 2:30:01 PM] Researcher: Hola","expected":{"messageCount":1,"sender":"Researcher","text":"Hola","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"timestamp-iso-dashed","category":"timestamp","locale":"ISO dashed","input":"2026-01-13, 12:22 PM - Researcher: Hello","expected":{"messageCount":1,"sender":"Researcher","text":"Hello","year":2026,"month":1,"day":13,"hour":12,"minute":22,"type":"text"}},
    {"id":"timestamp-android-yyyy-slash","category":"timestamp","locale":"Android YYYY/MM/DD","input":"2025/12/14, 11:06 - Researcher: Hello","expected":{"messageCount":1,"sender":"Researcher","text":"Hello","year":2025,"month":12,"day":14,"hour":11,"minute":6,"type":"text"}},
    {"id":"digits-arabic-indic","category":"normalization","locale":"Arabic-Indic digits","input":"١٥/٠٣/٢٤, ١٤:٣٠ - Researcher: مرحبا","expected":{"messageCount":1,"sender":"Researcher","text":"مرحبا","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"digits-persian","category":"normalization","locale":"Persian digits","input":"۱۵/۰۳/۲۴, ۱۴:۳۰ - Researcher: سلام","expected":{"messageCount":1,"sender":"Researcher","text":"سلام","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"digits-devanagari","category":"normalization","locale":"Devanagari digits","input":"१५/०३/२४, १४:३० - Researcher: नमस्ते","expected":{"messageCount":1,"sender":"Researcher","text":"नमस्ते","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"digits-thai","category":"normalization","locale":"Thai digits","input":"๑๕/๐๓/๒๔, ๑๔:๓๐ - Researcher: สวัสดี","expected":{"messageCount":1,"sender":"Researcher","text":"สวัสดี","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"behavior-multiline","category":"behavior","locale":"Multiline message","input":"3/15/24, 2:30 PM - Alice: first line\nsecond line","expected":{"messageCount":1,"sender":"Alice","text":"first line\nsecond line","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"text"}},
    {"id":"behavior-system","category":"behavior","locale":"System message","input":"3/15/24, 2:30 PM - Messages and calls are end-to-end encrypted.","expected":{"messageCount":1,"sender":"system","text":"Messages and calls are end-to-end encrypted.","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"system"}},
    {"id":"behavior-media","category":"behavior","locale":"Media marker","input":"3/15/24, 2:30 PM - Alice: IMG-20240315-WA0001.jpg (file attached)","expected":{"messageCount":1,"sender":"Alice","text":"IMG-20240315-WA0001.jpg (file attached)","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"media"}},
    {"id":"behavior-deleted","category":"behavior","locale":"Deleted message","input":"3/15/24, 2:30 PM - Alice: This message was deleted","expected":{"messageCount":1,"sender":"Alice","text":"This message was deleted","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"deleted"}},
    {"id":"behavior-call","category":"behavior","locale":"Call marker","input":"3/15/24, 2:30 PM - Alice: Missed voice call","expected":{"messageCount":1,"sender":"Alice","text":"Missed voice call","year":2024,"month":3,"day":15,"hour":14,"minute":30,"type":"call"}},
    {"id":"behavior-participants","category":"behavior","locale":"Participant extraction","input":"3/15/24, 2:30 PM - Alice: One\n3/15/24, 2:31 PM - Bob: Two","expected":{"messageCount":2,"participants":["Alice","Bob"]}}
  ]
}