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"generated_by": "tools/orderbook_ab/merge_ab.py", "hour": "2026-09-26/16", "hour_utc": "2026-09-26T16:00:00+00:00", "layout": "union-event-sorted-v1", "max_sequence": 347903071214454896, "merger_git_sha": "fcbb28046152741ae3754e951659977da4c8b36e", "min_sequence": 10133100833634948, "products": { "best_bid_ask": { "byte_range": [ 4, 157220768 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "best_bid", "best_ask", "spread", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 347903071214454878, "min_sequence": 10133100833635254, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 13694986, "row_groups": [ 0, 52 ], "sha256": "59ba0b97a47022c6781f956cd68f72ae115bab982be2bd4e8fc2b8424015a1d4" }, "book": { "byte_range": [ 157220768, 291200119 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "bids", "asks", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 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], "max_sequence": 347903071214416924, "min_sequence": 10133100837471949, "order_by": [ "market", "id", "timestamp", "sequence" ], "row_count": 11073, "row_groups": [ 74, 74 ], "sha256": "7a25a1764578b58abbfafbe311f34498757737de42e5ddc5db27b426712ad6d1" }, "new_market": { "byte_range": [ 295506756, 295923347 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "id", "assets_ids", "outcomes", "question", "slug", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 347903071214371683, "min_sequence": 10133100834158269, "order_by": [ "market", "id", "timestamp", "sequence" ], "row_count": 9379, "row_groups": [ 75, 75 ], "sha256": "56b3741eb651bd8edce8265c28b6301146b354c526b58786ce8125ed041e6c6e" }, "price_change": { "byte_range": [ 295923347, 1521697157 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "price", "size", "side", "best_bid", "best_ask", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 347903071214454896, "min_sequence": 10133100833634948, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 117149141, "row_groups": [ 76, 522 ], "sha256": "9a16b53e8ba11b60528643a2fe5595b1cc84301a48032ec9a2a05b8efaacccde" }, "tick_size_change": { "byte_range": [ 1521697157, 1521866936 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "old_tick_size", "new_tick_size", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 347621596246045493, "min_sequence": 10133100834406141, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 4640, "row_groups": [ 523, 523 ], "sha256": "a10a752792a24bb466db3f5e03102b364b95402cf11201ba7e1b0e3127a1adc9" } }, "row_count": 136003628, "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, i, k). The winner is per row, not per hour -- each row names its own in source_witness", "sha256": "6f04bbbf865410c80787c491cd07d8f1461f865d0425ba5cd736f1897ae76555", "skipped_witnesses": { "g": { "alive": false, "listed_utc": "2026-09-26T22:52:03.892975Z", "newest_upload": "2026-09-25T15:20:05.378000Z", "reason": "not_staged" } }, "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 == .sha256", "secondary": "curl -r - | sha256sum == .products..sha256" }, "witness_stats": "2026-09-26T16.witness_stats.json", "witnesses": "chik", "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." }