{
  "build_assumption": "Rows are emitted grouped by backbone sequence in generator order.",
  "bundle_id": "PBAC-PEPTIDE-SUBSTANCE-P-TACR-ED2-FULL-BUNDLE-001",
  "canonical_row_store": "parquet",
  "catalog_id": "PBAC-PEPTIDE-SUBSTANCE-P-TACR-ED2-FULL",
  "completed_at_utc": "2026-06-22T19:39:26Z",
  "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": 20065,
  "first_sequence": "RPKPQQFFGLM",
  "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": "RPKPQQFFGYY",
  "max_shards_per_sequence": 2,
  "multi_shard_sequence_count": 5,
  "release_id": "PBAC-PEPTIDE-SUBSTANCE-P-TACR-ED2-FULL-V1",
  "row_schema_version": "pbac_peptide_row_v1",
  "sequence_count": 20065,
  "sha256": {
    "sequence_shard_index.jsonl.gz": "10401fcad9bc9df6abf36bd5aad1b7e1fe1cda7b092c6976c6496c927cc0a07a"
  },
  "shard_count": 8,
  "shard_path_rule": "shards/{shard_id}/candidates.parquet",
  "source_config_hash_sha256": "dd5db922bb90cec5aeb34489252eda8b87b69602233afed76fd313d27209a869",
  "source_row_count": 120390,
  "structure_key_version": "pbac-sk-v1"
}
