{
  "generated_at": "2026-08-19T16:47:49.148769",
  "source": "OpenDigger / GH Archive public GitHub event log",
  "database": "opensource",
  "time_range": {
    "start": "2022-01-01",
    "end_exclusive": "2026-01-01"
  },
  "candidate_issue_count": 28105,
  "qualified_before_diversity": 950,
  "final_sample_count": 500,
  "repository_count": 468,
  "corpus_fragment_count": 9536,
  "random_seed": 20260820,
  "sampling_strategy": "explicit-reference cross-issue qualification followed by year-quality stratified deterministic random round-robin",
  "path_length_distribution": {
    "3": 500
  },
  "sample_year_distribution": {
    "2016": 2,
    "2017": 3,
    "2018": 3,
    "2019": 2,
    "2020": 9,
    "2021": 38,
    "2022": 116,
    "2023": 121,
    "2024": 111,
    "2025": 95
  },
  "split_distribution": {
    "dev": 100,
    "test": 400
  },
  "cross_repository_sample_count": 105,
  "cross_issue_sample_count": 500,
  "leakage_audit_violations": 0,
  "quality_score": {
    "minimum": 70.0,
    "maximum": 96.0,
    "mean": 88.919,
    "median": 88.0
  },
  "valid_comments_per_sample": {
    "minimum": 3,
    "maximum": 250,
    "mean": 17.072
  },
  "top_repositories": [
    [
      "microsoft/vscode",
      8
    ],
    [
      "flutter/flutter",
      5
    ],
    [
      "quarkusio/quarkus",
      3
    ],
    [
      "microsoft/TypeScript",
      3
    ],
    [
      "godotengine/godot",
      3
    ],
    [
      "python/cpython",
      2
    ],
    [
      "WordPress/gutenberg",
      2
    ],
    [
      "home-assistant/core",
      2
    ],
    [
      "vmware-tanzu/velero",
      2
    ],
    [
      "FlutterFlow/flutterflow-issues",
      2
    ],
    [
      "wagtail/wagtail",
      2
    ],
    [
      "sourcegraph/cody",
      2
    ],
    [
      "open-telemetry/opentelemetry-collector-contrib",
      2
    ],
    [
      "apache/shardingsphere",
      2
    ],
    [
      "rails/rails",
      2
    ],
    [
      "microsoft/vscode-cpptools",
      2
    ],
    [
      "llvm/llvm-project",
      2
    ],
    [
      "darthcloud/BlueRetro",
      2
    ],
    [
      "dotnet/maui",
      2
    ],
    [
      "gitpod-io/gitpod",
      2
    ]
  ],
  "selection_rules": {
    "target_samples": 500,
    "candidate_pool_size": 30000,
    "minimum_quality_score": 62.0,
    "max_samples_per_repository": 8,
    "maintainer_associations": [
      "COLLABORATOR",
      "MEMBER",
      "OWNER"
    ],
    "english_only": true,
    "minimum_english_ratio": 0.65,
    "random_seed": 20260820,
    "explicit_reference_required": true,
    "minimum_distinct_issue_ids_in_path": 2,
    "known_query_context_excluded_from_gold_path": true,
    "repository_disjoint_dev_test_split": true
  },
  "annotation_notice": "reference_answer and silver_evidence_path are heuristic silver labels. Human validation is required before reporting gold path metrics."
}