{
  "schema_version": "1.0",
  "title": "The activation sequence",
  "description": "The sequence separates proposal publication, signals, node enforcement, and persistent forks.",
  "type": "timeline",
  "items": [
    {
      "date": "2015-06-22",
      "label": "BIP101",
      "detail": "A hard-fork proposal specified an 8 MB initial limit and future increases."
    },
    {
      "date": "2015-12-21",
      "label": "SegWit proposal",
      "detail": "BIP141 documented witness commitments, transaction identifiers, weight, and deployment."
    },
    {
      "date": "2016-11-15",
      "label": "BIP9 window",
      "detail": "Miner signaling for the SegWit deployment began."
    },
    {
      "date": "2017-05-23",
      "label": "New York Agreement",
      "detail": "Companies and miners announced support for SegWit followed by a two-megabyte hard fork."
    },
    {
      "date": "2017-07-23",
      "label": "BIP91 active",
      "detail": "At block 477,120, the reduced-threshold miner-enforcement mechanism began coordinating signaling for BIP141."
    },
    {
      "date": "2017-08-01",
      "label": "Bitcoin Cash",
      "detail": "An incompatible larger-block chain separated."
    },
    {
      "date": "2017-08-24",
      "label": "SegWit active",
      "detail": "Upgraded nodes enforced BIP141 beginning at block 481,824."
    },
    {
      "date": "2017-11-08",
      "label": "SegWit2x suspended",
      "detail": "Organizers cancelled the planned hard fork before its target height."
    }
  ]
}