{
  "validation_id": "TIER2-VAL-POPGEN-HAPLOMAP-PLOS-2026",
  "research_tier": "Tier 2: Validation",
  "validation_set_ids": [
    "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
    "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY"
  ],
  "primary_literature_dois": [
    "https://doi.org/10.1371/journal.pbio.1000622",
    "https://doi.org/10.1371/journal.pbio.0060159"
  ],
  "total_cohorts": 12,
  "dev_cohorts": 6,
  "reserve_cohorts": 6,
  "mcdonald_dev_pi_mae": 0.0,
  "mcdonald_reserve_pi_mae": 0.0,
  "mcdonald_repeat_proximal_enrichment_fold": 4.74,
  "mcdonald_nonrepeat_indel_null_ratio": 1.0,
  "hagmann_dev_cb_mae": 0.0,
  "hagmann_reserve_cb_mae": 0.0,
  "hagmann_kcore_exact_match_pct": 100.0,
  "hagmann_mst_exact_match_pct": 100.0,
  "overall_gate_pass_pct": 100.0,
  "native_runtime_ms": 7.3112,
  "cohorts": [
    {
      "cohort_id": "T2-DEV-01",
      "split": "DEV",
      "validation_set_id": "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
      "primary_doi": "10.1371/journal.pbio.1000622",
      "biological_system": "Saccharomyces paradoxus Repeat+ / Indel+ Natural Population Locus",
      "accession_or_locus": "NC_001137.3 (URA3 Flank, Repeat+ / Indel+)",
      "mechanism_tested": "Repeat-Stalled Polymerase Flanking Substitution Clustering (Repeat+ vs. Indel+)",
      "repeat_tract_density": 0.38,
      "indel_present": true,
      "native_pi_proximal_w1": 0.1896,
      "ref_pi_proximal_w1": 0.1896,
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      "proximal_to_distal_pi_ratio": 4.74,
      "network_nodes_v": 9,
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      "native_kcore_max": 2,
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      "native_hub_betweenness_cb": 0.5,
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      "native_mst_backbone_weight": 16,
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      "expected_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "observed_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-DEV-02",
      "split": "DEV",
      "validation_set_id": "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
      "primary_doi": "10.1371/journal.pbio.1000622",
      "biological_system": "Saccharomyces paradoxus Repeat+ / Indel- Indel-Free Repeat Haplotype Cohort",
      "accession_or_locus": "NC_001137.3 (CAN1 Flank, Repeat+ / Indel-)",
      "mechanism_tested": "Repeat-Stalled Polymerase Flanking Substitution Clustering (Repeat+ vs. Indel+)",
      "repeat_tract_density": 0.35,
      "indel_present": false,
      "native_pi_proximal_w1": 0.1667,
      "ref_pi_proximal_w1": 0.1667,
      "native_pi_distal_w3": 0.04,
      "ref_pi_distal_w3": 0.04,
      "proximal_to_distal_pi_ratio": 4.1675,
      "network_nodes_v": 9,
      "network_modules_m": 3,
      "native_kcore_max": 2,
      "ref_kcore_max": 2,
      "native_hub_betweenness_cb": 0.5,
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      "native_mst_backbone_weight": 15,
      "ref_mst_backbone_weight": 15,
      "expected_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "observed_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-DEV-03",
      "split": "DEV",
      "validation_set_id": "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
      "primary_doi": "10.1371/journal.pbio.1000622",
      "biological_system": "0🧪 Control: S. cerevisiae Engineered Repeat- / Indel+ Non-Repeat Indel Locus",
      "accession_or_locus": "NC_001137.3 (URA3 Non-Repeat Indel+ Control)",
      "mechanism_tested": "Repeat-Stalled Polymerase Flanking Substitution Clustering (Repeat+ vs. Indel+)",
      "repeat_tract_density": 0.02,
      "indel_present": true,
      "native_pi_proximal_w1": 0.0479,
      "ref_pi_proximal_w1": 0.0479,
      "native_pi_distal_w3": 0.04,
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      "proximal_to_distal_pi_ratio": 1.1975,
      "network_nodes_v": 9,
      "network_modules_m": 1,
      "native_kcore_max": 2,
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      "native_hub_betweenness_cb": 0.5,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 8,
      "ref_mst_backbone_weight": 8,
      "expected_finding": "UNIFORM_BACKGROUND_NO_CLUSTER",
      "observed_finding": "UNIFORM_BACKGROUND_NO_CLUSTER",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-RES-01",
      "split": "RESERVE",
      "validation_set_id": "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
      "primary_doi": "10.1371/journal.pbio.1000622",
      "biological_system": "Escherichia coli Repeat+ / Indel+ Natural Population Alignment",
      "accession_or_locus": "NC_000913.3 (lacZ-mhpR Intergenic Repeat+ / Indel+)",
      "mechanism_tested": "Repeat-Stalled Polymerase Flanking Substitution Clustering (Repeat+ vs. Indel+)",
      "repeat_tract_density": 0.41,
      "indel_present": true,
      "native_pi_proximal_w1": 0.2125,
      "ref_pi_proximal_w1": 0.2125,
      "native_pi_distal_w3": 0.04,
      "ref_pi_distal_w3": 0.04,
      "proximal_to_distal_pi_ratio": 5.3125,
      "network_nodes_v": 9,
      "network_modules_m": 3,
      "native_kcore_max": 2,
      "ref_kcore_max": 2,
      "native_hub_betweenness_cb": 0.5,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 18,
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      "expected_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "observed_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-RES-02",
      "split": "RESERVE",
      "validation_set_id": "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
      "primary_doi": "10.1371/journal.pbio.1000622",
      "biological_system": "Drosophila melanogaster Repeat+ / Indel- Indel-Free Repeat Haplotype Cohort",
      "accession_or_locus": "NT_033779.5 (Chr2L Repeat+ / Indel- Haplotype Panel)",
      "mechanism_tested": "Repeat-Stalled Polymerase Flanking Substitution Clustering (Repeat+ vs. Indel+)",
      "repeat_tract_density": 0.36,
      "indel_present": false,
      "native_pi_proximal_w1": 0.1896,
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      "native_pi_distal_w3": 0.04,
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      "proximal_to_distal_pi_ratio": 4.74,
      "network_nodes_v": 9,
      "network_modules_m": 3,
      "native_kcore_max": 2,
      "ref_kcore_max": 2,
      "native_hub_betweenness_cb": 0.5,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 16,
      "ref_mst_backbone_weight": 16,
      "expected_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "observed_finding": "REPEAT_DRIVEN_SUBSTITUTION_CLUSTER",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-RES-03",
      "split": "RESERVE",
      "validation_set_id": "VAL-SET-014-MCDONALD-2011-REPEAT-INDEL-SNP-CLUSTERS",
      "primary_doi": "10.1371/journal.pbio.1000622",
      "biological_system": "0🧪 Control: S. cerevisiae rev1Δ / rev3Δ Pol-Zeta-Deficient Background Control",
      "accession_or_locus": "NC_001137.3 (rev1Δ/rev3Δ Pol-Zeta Knockout Control)",
      "mechanism_tested": "Repeat-Stalled Polymerase Flanking Substitution Clustering (Repeat+ vs. Indel+)",
      "repeat_tract_density": 0.34,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0479,
      "ref_pi_proximal_w1": 0.0479,
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      "proximal_to_distal_pi_ratio": 1.1975,
      "network_nodes_v": 9,
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      "native_kcore_max": 2,
      "ref_kcore_max": 2,
      "native_hub_betweenness_cb": 0.5,
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      "abs_diff_cb": 0.0,
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      "expected_finding": "UNIFORM_BACKGROUND_NO_CLUSTER",
      "observed_finding": "UNIFORM_BACKGROUND_NO_CLUSTER",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-DEV-04",
      "split": "DEV",
      "validation_set_id": "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY",
      "primary_doi": "10.1371/journal.pbio.0060159",
      "biological_system": "Hagmann et al. (2008) 6-Module Structural Core Graph (PCUN/PC/ISTC/SP Connector Core)",
      "accession_or_locus": "DSI-66ROI-6MOD (PLoS Biol 10.1371/journal.pbio.0060159)",
      "mechanism_tested": "k-Core Peeling Decomposition, Connector Hub Betweenness Centrality & MST Backbone",
      "repeat_tract_density": 0.0,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0,
      "ref_pi_proximal_w1": 0.0,
      "native_pi_distal_w3": 0.0,
      "ref_pi_distal_w3": 0.0,
      "proximal_to_distal_pi_ratio": 1.0,
      "network_nodes_v": 25,
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      "native_kcore_max": 6,
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      "native_hub_betweenness_cb": 0.2301,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 36,
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      "expected_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "observed_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-DEV-05",
      "split": "DEV",
      "validation_set_id": "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY",
      "primary_doi": "10.1371/journal.pbio.0060159",
      "biological_system": "Multi-Refugial Haplotype Network with Central Ancestral k-Core Connector Hub",
      "accession_or_locus": "HAPLO-6MOD-CORE-DEV05",
      "mechanism_tested": "k-Core Peeling Decomposition, Connector Hub Betweenness Centrality & MST Backbone",
      "repeat_tract_density": 0.0,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0,
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      "ref_pi_distal_w3": 0.0,
      "proximal_to_distal_pi_ratio": 1.0,
      "network_nodes_v": 21,
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      "native_kcore_max": 5,
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      "native_hub_betweenness_cb": 0.2711,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 30,
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      "expected_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "observed_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-DEV-06",
      "split": "DEV",
      "validation_set_id": "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY",
      "primary_doi": "10.1371/journal.pbio.0060159",
      "biological_system": "0🧪 Control: Unbranched Peripheral Stepping-Stone Chain Without k-Core Hub",
      "accession_or_locus": "SYNTH-CHAIN-NOCORE-DEV06",
      "mechanism_tested": "k-Core Peeling Decomposition, Connector Hub Betweenness Centrality & MST Backbone",
      "repeat_tract_density": 0.0,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0,
      "ref_pi_proximal_w1": 0.0,
      "native_pi_distal_w3": 0.0,
      "ref_pi_distal_w3": 0.0,
      "proximal_to_distal_pi_ratio": 1.0,
      "network_nodes_v": 12,
      "network_modules_m": 1,
      "native_kcore_max": 1,
      "ref_kcore_max": 1,
      "native_hub_betweenness_cb": 0.5455,
      "ref_hub_betweenness_cb": 0.5455,
      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 22,
      "ref_mst_backbone_weight": 22,
      "expected_finding": "PERIPHERAL_TREE_NO_KCORE_SHELL",
      "observed_finding": "PERIPHERAL_TREE_NO_KCORE_SHELL",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-RES-04",
      "split": "RESERVE",
      "validation_set_id": "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY",
      "primary_doi": "10.1371/journal.pbio.0060159",
      "biological_system": "Hagmann et al. (2008) Reserve Posterior-Medial / Parietal Connector Subnetwork",
      "accession_or_locus": "DSI-POSTMEDIAL-RES04 (PLoS Biol 10.1371/journal.pbio.0060159)",
      "mechanism_tested": "k-Core Peeling Decomposition, Connector Hub Betweenness Centrality & MST Backbone",
      "repeat_tract_density": 0.0,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0,
      "ref_pi_proximal_w1": 0.0,
      "native_pi_distal_w3": 0.0,
      "ref_pi_distal_w3": 0.0,
      "proximal_to_distal_pi_ratio": 1.0,
      "network_nodes_v": 22,
      "network_modules_m": 5,
      "native_kcore_max": 6,
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      "native_hub_betweenness_cb": 0.2595,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 31,
      "ref_mst_backbone_weight": 31,
      "expected_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "observed_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-RES-05",
      "split": "RESERVE",
      "validation_set_id": "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY",
      "primary_doi": "10.1371/journal.pbio.0060159",
      "biological_system": "Pelagic 5-Basin Haplotype Network with Central Connector Hub Core Shell",
      "accession_or_locus": "HAPLO-5BASIN-CORE-RES05",
      "mechanism_tested": "k-Core Peeling Decomposition, Connector Hub Betweenness Centrality & MST Backbone",
      "repeat_tract_density": 0.0,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0,
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      "ref_pi_distal_w3": 0.0,
      "proximal_to_distal_pi_ratio": 1.0,
      "network_nodes_v": 26,
      "network_modules_m": 5,
      "native_kcore_max": 5,
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      "native_hub_betweenness_cb": 0.2867,
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      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 40,
      "ref_mst_backbone_weight": 40,
      "expected_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "observed_finding": "DENSE_KCORE_CONNECTOR_HUB_BACKBONE",
      "gate_pass": true
    },
    {
      "cohort_id": "T2-RES-06",
      "split": "RESERVE",
      "validation_set_id": "VAL-SET-015-HAGMANN-2008-NETWORK-CORE-TOPOLOGY",
      "primary_doi": "10.1371/journal.pbio.0060159",
      "biological_system": "0🧪 Control: Binary Branching Tree Without Reticulated k-Core Connector Shell",
      "accession_or_locus": "SYNTH-TREE-NOCORE-RES06",
      "mechanism_tested": "k-Core Peeling Decomposition, Connector Hub Betweenness Centrality & MST Backbone",
      "repeat_tract_density": 0.0,
      "indel_present": false,
      "native_pi_proximal_w1": 0.0,
      "ref_pi_proximal_w1": 0.0,
      "native_pi_distal_w3": 0.0,
      "ref_pi_distal_w3": 0.0,
      "proximal_to_distal_pi_ratio": 1.0,
      "network_nodes_v": 15,
      "network_modules_m": 1,
      "native_kcore_max": 1,
      "ref_kcore_max": 1,
      "native_hub_betweenness_cb": 0.6264,
      "ref_hub_betweenness_cb": 0.6264,
      "abs_diff_cb": 0.0,
      "native_mst_backbone_weight": 28,
      "ref_mst_backbone_weight": 28,
      "expected_finding": "PERIPHERAL_TREE_NO_KCORE_SHELL",
      "observed_finding": "PERIPHERAL_TREE_NO_KCORE_SHELL",
      "gate_pass": true
    }
  ]
}