{
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  "file": "2026-08-28T00.parquet",
  "generated_by": "tools/orderbook_ab/merge_ab.py",
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        "timestamp",
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      "columns": [
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        "timestamp",
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        "id",
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        "arrival_skew",
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      "sha256": "618373458b91205a109dc698ad8c7697fab945124cd1491edd914451166f3b13"
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      "columns": [
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      "columns": [
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        "sequence",
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        "market",
        "asset_id",
        "old_tick_size",
        "new_tick_size",
        "witness_set",
        "arrival_skew",
        "source_witness"
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      "max_sequence": 49821072245325232,
      "min_sequence": 281476718376445,
      "order_by": [
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        "timestamp",
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      ],
      "row_count": 2160,
      "row_groups": [
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  },
  "row_count": 103711900,
  "sequence_note": "sequence and timestamp_received are collector-local provenance; where domains carry the same row, the merge keeps the LAST ACTIVE domain's values -- for this hour, domain e (active: a, b, c, h, e)",
  "sha256": "a80af3ee9583773b4fc16d57b17e6cde8c561d1f0ba793e741093eb82f9bd9e1",
  "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"
  },
  "witnesses": "abche",
  "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."
}