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    "prefix": "merged-live/2026-08-27/12/",
    "products": {
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    "note": "Built by pendulumflow from its own canonical seven-file hour, which is unmodified and remains the source of record. Not upstream data.",
    "source_manifest": {
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          "rows_by_domain": {
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        "new_market": {
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        },
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      },
      "archive_root": "merged-live",
      "boundary_guard": "cache",
      "generated_by": "tools/orderbook_ab/merge_ab.py",
      "hour_utc": "2026-08-27T12:00:00+00:00",
      "max_sequence": 119345390269685505,
      "min_sequence": 281475550552177,
      "row_count": 83128678,
      "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)",
      "witnesses": "abche"
    }
  },
  "verification": {
    "primary": "sha256sum <file> == .sha256",
    "secondary": "curl -r <start>-<end-1> <url> | sha256sum == .products.<name>.sha256",
    "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."
  }
}