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  "file": "2026-09-30T06.parquet",
  "generated_by": "tools/orderbook_ab/merge_ab.py",
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  "hour_utc": "2026-09-30T06:00:00+00:00",
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      "columns": [
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        "timestamp",
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      "columns": [
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        "sequence",
        "timestamp",
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        "asset_id",
        "bids",
        "asks",
        "witness_set",
        "arrival_skew",
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    "last_trade_price": {
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      "columns": [
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        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "price",
        "size",
        "side",
        "fee_rate_bps",
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      "columns": [
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        "timestamp",
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        "assets_ids",
        "winning_asset_id",
        "winning_outcome",
        "witness_set",
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    "new_market": {
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      "columns": [
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        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
        "outcomes",
        "question",
        "slug",
        "witness_set",
        "arrival_skew",
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      "max_sequence": 72339073753199317,
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      "row_count": 687,
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    },
    "price_change": {
      "byte_range": [
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "price",
        "size",
        "side",
        "best_bid",
        "best_ask",
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      ],
      "max_sequence": 72339073761486916,
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      "order_by": [
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        "timestamp",
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      ],
      "row_count": 91958312,
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      "sha256": "4be7125af4d12ab6670897a419181060840e8e2f47b8f81cfa67888a3bff0b39"
    },
    "tick_size_change": {
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "old_tick_size",
        "new_tick_size",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 72339073739947473,
      "min_sequence": 281475801268076,
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        "timestamp",
        "sequence"
      ],
      "row_count": 2464,
      "row_groups": [
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      ],
      "sha256": "eabe8525989bc48dcd5ed873feaf117cca02c9b06290da4fc57852178c048bc5"
    }
  },
  "row_count": 101713596,
  "sequence_note": "sequence and timestamp_received are collector-local provenance; where domains carry the same row, the merge keeps the EARLIEST-RECEIVED copy, equal arrivals breaking by registry order (active: h, g, i, k, m). The winner is per row, not per hour -- each row names its own in source_witness",
  "sha256": "190cf941d0a88acb1e497fade93155f7e0f42e1968230d3f0104060c0e2e67d7",
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    "c": {
      "bytes": 862104492,
      "first_ts": "2026-06-17T10:21:05.003000Z",
      "gap_records": 0,
      "last_ts": "2026-09-30T06:59:59.996000Z",
      "rows": 101603264
    }
  },
  "verification": {
    "note": "A range digest certifies BYTES. That those bytes are that product comes from this manifest and is cross-checkable against the Parquet footer, which is inside the whole-file sha256.",
    "primary": "sha256sum <file> == .sha256",
    "secondary": "curl -r <start>-<end-1> <url> | sha256sum == .products.<name>.sha256"
  },
  "witness_stats": "2026-09-30T06.witness_stats.json",
  "witnesses": "hgikm",
  "served_verbatim": true,
  "served_note": "This hour is the merger's union file, published byte for byte. Hours before the era cutover are rebuilt here from the seven product files and carry one column fewer."
}
