{
  "build_assumption": "Rows are emitted grouped by backbone sequence in generator order.",
  "bundle_id": "PBAC-PEPTIDE-CART42-89-CARTPT-ED2-FULL-BUNDLE-001",
  "canonical_row_store": "parquet",
  "catalog_id": "PBAC-PEPTIDE-CART42-89-CARTPT-ED2-FULL",
  "completed_at_utc": "2026-06-23T19:31:07Z",
  "entry_semantics": "Each entry maps one backbone sequence to every candidate shard that may contain exact asset rows for that sequence. The Parquet shard remains canonical.",
  "expected_sequence_count": 311620,
  "first_sequence": "VPIYEKKYGQVPMCDAGEQCAVRKGARIGKLCDCPRGTSCNSFLLKCL",
  "generator_version": "0.1.0",
  "index_builder_version": "0.1.0",
  "index_file": "sequence_shard_index.jsonl.gz",
  "index_schema_version": "pbac_sequence_shard_index_manifest_v1",
  "index_type": "sequence_to_candidate_shards",
  "last_sequence": "VPIYEKKYGQVPMCDAGEQCAVRKGARIGKLCDCPRGTSCNSFLLYCY",
  "max_shards_per_sequence": 2,
  "multi_shard_sequence_count": 78,
  "release_id": "PBAC-PEPTIDE-CART42-89-CARTPT-ED2-FULL-V1",
  "row_schema_version": "pbac_peptide_row_v1",
  "sequence_count": 311620,
  "sha256": {
    "sequence_shard_index.jsonl.gz": "2bf8506a50e43fa4bd44f29a83f87f7112cae4538546413876337758e0c9539c"
  },
  "shard_count": 117,
  "shard_path_rule": "shards/{shard_id}/candidates.parquet",
  "source_config_hash_sha256": "f3235429cc283faf8d7f2b097d0ba667174702c426e53839de4469f0ad12f4a8",
  "source_row_count": 1869720,
  "structure_key_version": "pbac-sk-v1"
}
