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    },
    "tick_size_change": {
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      "exception_markets": 1933,
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      "witness_latency": {
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  },
  "archive_root": "union-staging",
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  "bytes": 1829404061,
  "file": "2026-10-03T20.parquet",
  "generated_by": "tools/orderbook_ab/merge_ab.py",
  "hour": "2026-10-03/20",
  "hour_utc": "2026-10-03T20:00:00+00:00",
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "best_bid",
        "best_ask",
        "spread",
        "witness_set",
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      "sha256": "7bc634e98f1df6e00eab675e5c39cf384677fb36548c54a80760321146eff75e"
    },
    "book": {
      "byte_range": [
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "bids",
        "asks",
        "witness_set",
        "arrival_skew",
        "source_witness"
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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",
        "transaction_hash",
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
        "winning_asset_id",
        "winning_outcome",
        "witness_set",
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    },
    "new_market": {
      "byte_range": [
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
        "outcomes",
        "question",
        "slug",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 79094468470126355,
      "min_sequence": 281485392906991,
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      ],
      "row_count": 17581,
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      "sha256": "d551b7be76c60fe4b5f33a624fff3c3f836a31091de15b31f49a891c81550654"
    },
    "price_change": {
      "byte_range": [
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "price",
        "size",
        "side",
        "best_bid",
        "best_ask",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 79094468470280585,
      "min_sequence": 281485392322137,
      "order_by": [
        "market",
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        "timestamp",
        "sequence"
      ],
      "row_count": 136658444,
      "row_groups": [
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      "sha256": "df04b503e4da3690c75b27cc8b63907e9fe1c31698d687a1710de3c60d8ea42e"
    },
    "tick_size_change": {
      "byte_range": [
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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": 72620544097196145,
      "min_sequence": 281485396375943,
      "order_by": [
        "market",
        "asset_id",
        "timestamp",
        "sequence"
      ],
      "row_count": 13076,
      "row_groups": [
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        597
      ],
      "sha256": "5bdb6e13d895dd981f90842bbcd689aee87eb2396635574f46c4f36e695fe416"
    }
  },
  "row_count": 155441122,
  "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": "99f22f33a797a5f235a8bee495f656fedf4fea5e4a0addc5356b81aac8ce8d85",
  "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": "2026-10-03T20.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."
}
