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"2026-09-21T12.parquet", "generated_by": "tools/orderbook_ab/merge_ab.py", "hour": "2026-09-21/12", "hour_utc": "2026-09-21T12:00:00+00:00", "layout": "union-event-sorted-v1", "max_sequence": 288511851140973417, "merger_git_sha": "fcbb28046152741ae3754e951659977da4c8b36e", "min_sequence": 8162776235013529, "products": { "best_bid_ask": { "byte_range": [ 4, 138974838 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "best_bid", "best_ask", "spread", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 288511851140973393, "min_sequence": 8162776235013758, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 12024638, "row_groups": [ 0, 45 ], "sha256": "f57c39e9a76259adeb1fd45938290edece4be1c1a2fee17fb4ddb4635257c85e" }, "book": { "byte_range": [ 138974838, 226506600 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "bids", "asks", "witness_set", "arrival_skew", "source_witness" ], 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"source_witness" ], "max_sequence": 288511851139009928, "min_sequence": 8162776249003290, "order_by": [ "market", "id", "timestamp", "sequence" ], "row_count": 831, "row_groups": [ 54, 54 ], "sha256": "3e164b3fcc7be96442618159419c5a0809fa00dcab284f19a42995000b9128fa" }, "new_market": { "byte_range": [ 230128003, 230828240 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "id", "assets_ids", "outcomes", "question", "slug", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 288511851135365060, "min_sequence": 8162776235696156, "order_by": [ "market", "id", "timestamp", "sequence" ], "row_count": 7236, "row_groups": [ 55, 55 ], "sha256": "6e8c00fa767d92340aa1d4c2a2b214b1dad94b275472b8f539a0d0b8b9ef816b" }, "price_change": { "byte_range": [ 230828240, 1305499993 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "price", "size", "side", "best_bid", "best_ask", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 288511851140973417, "min_sequence": 8162776235013529, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 106580659, "row_groups": [ 56, 462 ], "sha256": "8b91df9ca3fa3c2d2460310e8cf119c163b7a757b09f03a7e3f2f60178f9ee9b" }, "tick_size_change": { "byte_range": [ 1305499993, 1305629206 ], "columns": [ "timestamp_received", "sequence", "timestamp", "market", "asset_id", "old_tick_size", "new_tick_size", "witness_set", "arrival_skew", "source_witness" ], "max_sequence": 288511851139365499, "min_sequence": 8162776251857222, "order_by": [ "market", "asset_id", "timestamp", "sequence" ], "row_count": 3604, "row_groups": [ 463, 463 ], "sha256": "00b1e31c65ede7e4047f553f0c1a04362e77d4bf8c03598db1879b51c2541e49" } }, "row_count": 120502517, "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, e, f). The winner is per row, not per hour -- each row names its own in source_witness", "sha256": "90d28202ecc4eeccc0fb7492529c832680e9ae6e73e38d782ebbb7ba023387eb", "skipped_witnesses": { "g": { "alive": false, "listed_utc": "2026-09-21T13:35:53.387565Z", "newest_upload": "2026-09-20T20:20:39.551000Z", "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": "2026-09-21T12.witness_stats.json", "witnesses": "chef", "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." }