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  "generated_by": "tools/orderbook_ab/merge_ab.py",
  "hour": "2026-09-23/17",
  "hour_utc": "2026-09-23T17:00:00+00:00",
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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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        "timestamp",
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        "size",
        "side",
        "fee_rate_bps",
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      "columns": [
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      "columns": [
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        "sequence",
        "timestamp",
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        "assets_ids",
        "outcomes",
        "question",
        "slug",
        "witness_set",
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      "max_sequence": 316096398858178435,
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      "columns": [
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        "sequence",
        "timestamp",
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        "asset_id",
        "price",
        "size",
        "side",
        "best_bid",
        "best_ask",
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      "max_sequence": 316096398859106717,
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        "timestamp",
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      ],
      "row_count": 122854274,
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      "sha256": "b0af48a9556ac2af890f1aee4f6b97df41f0ad22d40e1a13985a252aab1d3607"
    },
    "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": 316096398857735565,
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      "order_by": [
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        "timestamp",
        "sequence"
      ],
      "row_count": 3516,
      "row_groups": [
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      "sha256": "b6baf0ecbecac4a63e1d5995aee0e75f5215c40fb90912c5b14f98a70cf1ef71"
    }
  },
  "row_count": 137879019,
  "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: c, h, g, i, k). The winner is per row, not per hour -- each row names its own in source_witness",
  "sha256": "42013a21fa1ff21f8cde9ce312dc035555d938c8ccf91547db18ebd57f2c30f4",
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    "f": {
      "bytes": 1071259917,
      "first_ts": "2026-05-29T22:22:34.696000Z",
      "gap_records": 0,
      "last_ts": "2026-09-23T17:59:59.953000Z",
      "rows": 119005964
    }
  },
  "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": "2026-09-23T17.witness_stats.json",
  "witnesses": "chgik",
  "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."
}
