{
  "investigation_date": "2026-10-27",
  "archive_hour_utc": "2026-10-24T00:00:00Z/2026-10-24T01:00:00Z",
  "scope": "Two full archives, one per source; bounded adjacent-hour probes; one anonymous live GitHub API page. Not a global quality audit.",
  "privacy": "Only aggregate results. No credentials, original event rows, actor IDs, repository names, or payload bodies.",
  "limitations": [
    "Not a byte-hash or ground-truth completeness audit.",
    "Single-file distinct IDs do not prove cross-file uniqueness.",
    "Archive time and created_at windows are different.",
    "Live API probe was made at a different time/authentication/cache context from historical collectors.",
    "Result-return latency and cleanup warnings are not performance benchmarks."
  ],
  "gharchive": {
    "source_url": "https://data.gharchive.org/2026-10-24-0.json.gz",
    "copy": [
      {
        "File": "2026-10-24-0.json.gz",
        "Rows_loaded": 2850,
        "Errors_seen": 0,
        "First_error": null,
        "First_error_line": null
      }
    ],
    "quality": [
      {
        "rows_loaded": 2850,
        "distinct_ids": 2850,
        "min_time_utc": "2026-10-24 00:00:00.000000",
        "max_time_utc": "2026-10-24 00:59:58.000000",
        "repositories": 2360,
        "actors": 1801,
        "empty_ids": 0,
        "empty_types": 0,
        "invalid_actor_object": 0,
        "invalid_repo_object": 0,
        "invalid_payload_object": 0,
        "missing_actor_id": 0,
        "missing_actor_login": 0,
        "missing_repo_id": 0,
        "missing_repo_name": 0,
        "org_sql_null": 1831,
        "org_json_null": 0,
        "org_objects": 1019,
        "public_true": 2850,
        "public_false": 0,
        "public_null": 0,
        "nonempty_extra_fields": 0,
        "bot_suffix_events": 889,
        "out_of_hour": 0
      }
    ]
  },
  "opendigger": {
    "source_url": "https://gharchive.open-digger.net/2026-10-24-0.json.gz",
    "manifest_declared_event_count": 644116,
    "manifest_declared_compressed_bytes": 507812223,
    "copy": [
      {
        "File": "2026-10-24-0.json.gz",
        "Rows_loaded": 644116,
        "Errors_seen": 0,
        "First_error": null,
        "First_error_line": null
      }
    ],
    "quality": [
      {
        "rows_loaded": 644116,
        "distinct_ids": 644116,
        "duplicate_id_rows": 0,
        "event_types": 16,
        "repositories": 229218,
        "actors": 163115,
        "min_time_utc": "2015-07-21 22:35:06.000000",
        "max_time_utc": "2026-10-24 00:54:58.000000",
        "events_in_archive_hour": 215598,
        "events_on_archive_day": 215598,
        "events_before_archive_hour": 428518,
        "events_after_archive_hour": 0,
        "events_more_than_one_day_old": 23071,
        "events_more_than_30_days_old": 783,
        "empty_ids": 0,
        "empty_types": 0,
        "invalid_actor_object": 0,
        "invalid_repo_object": 0,
        "invalid_payload_object": 0,
        "missing_actor_id": 0,
        "missing_actor_login": 0,
        "missing_repo_id": 8,
        "missing_repo_name": 8,
        "public_true": 644100,
        "public_false": 16,
        "public_null": 0,
        "org_sql_null": 471485,
        "org_json_null": 0,
        "org_objects": 172631,
        "rows_with_extra_fields": 0,
        "bot_suffix_events": 201265,
        "source_files": 1,
        "source_url": "https://gharchive.open-digger.net/2026-10-24-0.json.gz"
      }
    ],
    "types_and_event_times": [
      {
        "type": "PushEvent",
        "events": 288431,
        "distinct_ids": 288431,
        "events_in_archive_hour": 0,
        "min_event_time_utc": "2026-10-23 00:30:40.000000",
        "max_event_time_utc": "2026-10-23 23:17:22.000000"
      },
      {
        "type": "PullRequestEvent",
        "events": 101675,
        "distinct_ids": 101675,
        "events_in_archive_hour": 88992,
        "min_event_time_utc": "2021-05-11 01:21:11.000000",
        "max_event_time_utc": "2026-10-24 00:54:56.000000"
      },
      {
        "type": "IssueCommentEvent",
        "events": 98347,
        "distinct_ids": 98347,
        "events_in_archive_hour": 35966,
        "min_event_time_utc": "2026-10-22 21:32:19.000000",
        "max_event_time_utc": "2026-10-24 00:54:55.000000"
      },
      {
        "type": "CreateEvent",
        "events": 37467,
        "distinct_ids": 37467,
        "events_in_archive_hour": 0,
        "min_event_time_utc": "2026-10-23 00:30:41.000000",
        "max_event_time_utc": "2026-10-23 23:17:16.000000"
      },
      {
        "type": "IssuesEvent",
        "events": 33201,
        "distinct_ids": 33201,
        "events_in_archive_hour": 30350,
        "min_event_time_utc": "2026-10-23 23:54:57.000000",
        "max_event_time_utc": "2026-10-24 00:54:58.000000"
      },
      {
        "type": "PullRequestReviewEvent",
        "events": 18747,
        "distinct_ids": 18747,
        "events_in_archive_hour": 17092,
        "min_event_time_utc": "2026-10-23 23:54:57.000000",
        "max_event_time_utc": "2026-10-24 00:54:56.000000"
      },
      {
        "type": "DeleteEvent",
        "events": 18321,
        "distinct_ids": 18321,
        "events_in_archive_hour": 0,
        "min_event_time_utc": "2026-10-23 00:30:41.000000",
        "max_event_time_utc": "2026-10-23 23:17:22.000000"
      },
      {
        "type": "PullRequestReviewCommentEvent",
        "events": 14126,
        "distinct_ids": 14126,
        "events_in_archive_hour": 12922,
        "min_event_time_utc": "2026-10-23 23:54:56.000000",
        "max_event_time_utc": "2026-10-24 00:54:56.000000"
      },
      {
        "type": "WatchEvent",
        "events": 11734,
        "distinct_ids": 11734,
        "events_in_archive_hour": 10783,
        "min_event_time_utc": "2026-10-23 23:54:55.000000",
        "max_event_time_utc": "2026-10-24 00:54:55.000000"
      },
      {
        "type": "ReleaseEvent",
        "events": 8935,
        "distinct_ids": 8935,
        "events_in_archive_hour": 8226,
        "min_event_time_utc": "2026-10-23 23:54:55.000000",
        "max_event_time_utc": "2026-10-24 00:54:56.000000"
      },
      {
        "type": "GollumEvent",
        "events": 7968,
        "distinct_ids": 7968,
        "events_in_archive_hour": 7297,
        "min_event_time_utc": "2026-10-23 23:54:57.000000",
        "max_event_time_utc": "2026-10-24 00:54:56.000000"
      },
      {
        "type": "ForkEvent",
        "events": 2748,
        "distinct_ids": 2748,
        "events_in_archive_hour": 2515,
        "min_event_time_utc": "2026-10-23 23:54:54.000000",
        "max_event_time_utc": "2026-10-24 00:54:53.000000"
      },
      {
        "type": "PublicEvent",
        "events": 1069,
        "distinct_ids": 1069,
        "events_in_archive_hour": 209,
        "min_event_time_utc": "2015-07-21 22:35:06.000000",
        "max_event_time_utc": "2026-10-24 00:51:44.000000"
      },
      {
        "type": "MemberEvent",
        "events": 772,
        "distinct_ids": 772,
        "events_in_archive_hour": 722,
        "min_event_time_utc": "2026-10-23 23:54:58.000000",
        "max_event_time_utc": "2026-10-24 00:54:52.000000"
      },
      {
        "type": "CommitCommentEvent",
        "events": 428,
        "distinct_ids": 428,
        "events_in_archive_hour": 385,
        "min_event_time_utc": "2026-10-23 23:54:58.000000",
        "max_event_time_utc": "2026-10-24 00:54:31.000000"
      },
      {
        "type": "DiscussionEvent",
        "events": 147,
        "distinct_ids": 147,
        "events_in_archive_hour": 139,
        "min_event_time_utc": "2025-03-25 19:52:28.000000",
        "max_event_time_utc": "2026-10-24 00:54:33.000000"
      }
    ],
    "event_time_buckets": [
      {
        "time_bucket": "1_in_archive_hour",
        "events": 215598,
        "distinct_ids": 215598,
        "min_event_time_utc": "2026-10-24 00:00:00.000000",
        "max_event_time_utc": "2026-10-24 00:54:58.000000"
      },
      {
        "time_bucket": "2_previous_0_to_6_hours",
        "events": 156222,
        "distinct_ids": 156222,
        "min_event_time_utc": "2026-10-23 18:00:00.000000",
        "max_event_time_utc": "2026-10-23 23:59:59.000000"
      },
      {
        "time_bucket": "3_previous_6_to_24_hours",
        "events": 249225,
        "distinct_ids": 249225,
        "min_event_time_utc": "2026-10-23 00:00:00.000000",
        "max_event_time_utc": "2026-10-23 17:59:59.000000"
      },
      {
        "time_bucket": "4_previous_1_to_7_days",
        "events": 21312,
        "distinct_ids": 21312,
        "min_event_time_utc": "2026-10-17 00:01:58.000000",
        "max_event_time_utc": "2026-10-22 23:59:59.000000"
      },
      {
        "time_bucket": "5_previous_7_to_30_days",
        "events": 976,
        "distinct_ids": 976,
        "min_event_time_utc": "2026-09-24 00:09:02.000000",
        "max_event_time_utc": "2026-10-16 23:58:11.000000"
      },
      {
        "time_bucket": "6_older_than_30_days",
        "events": 783,
        "distinct_ids": 783,
        "min_event_time_utc": "2015-07-21 22:35:06.000000",
        "max_event_time_utc": "2026-09-23 22:26:35.000000"
      }
    ],
    "field_coverage": [
      {
        "type": "PullRequestEvent",
        "field": "number",
        "event_count": 101675,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 101675
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request",
        "event_count": 101675,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 101675
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.additions",
        "event_count": 101675,
        "missing_sql_null": 101675,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.base.repo.language",
        "event_count": 101675,
        "missing_sql_null": 101675,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.changed_files",
        "event_count": 101675,
        "missing_sql_null": 101675,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.deletions",
        "event_count": 101675,
        "missing_sql_null": 101675,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.id",
        "event_count": 101675,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 101675
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.merged",
        "event_count": 101675,
        "missing_sql_null": 101675,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PullRequestEvent",
        "field": "pull_request.merged_at",
        "event_count": 101675,
        "missing_sql_null": 101675,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PushEvent",
        "field": "before",
        "event_count": 288431,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 288431
      },
      {
        "type": "PushEvent",
        "field": "commits",
        "event_count": 288431,
        "missing_sql_null": 288431,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PushEvent",
        "field": "distinct_size",
        "event_count": 288431,
        "missing_sql_null": 288431,
        "json_null": 0,
        "nonnull": 0
      },
      {
        "type": "PushEvent",
        "field": "head",
        "event_count": 288431,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 288431
      },
      {
        "type": "PushEvent",
        "field": "push_id",
        "event_count": 288431,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 288431
      },
      {
        "type": "PushEvent",
        "field": "ref",
        "event_count": 288431,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 288431
      },
      {
        "type": "PushEvent",
        "field": "repository_id",
        "event_count": 288431,
        "missing_sql_null": 0,
        "json_null": 0,
        "nonnull": 288431
      },
      {
        "type": "PushEvent",
        "field": "size",
        "event_count": 288431,
        "missing_sql_null": 288431,
        "json_null": 0,
        "nonnull": 0
      }
    ]
  },
  "cross_source_file_id_sets": [
    {
      "union_distinct_ids": 644333,
      "shared_ids": 2633,
      "only_opendigger_ids": 641483,
      "only_gharchive_ids": 217,
      "shared_id_type_mismatches": 0,
      "shared_id_time_mismatches": 0,
      "shared_ids_in_event_hour": 2633
    }
  ],
  "cross_source_event_hour": [
    {
      "type": "PullRequestEvent",
      "opendigger_events_in_hour": 88992,
      "gharchive_events_in_hour": 1196,
      "shared_ids": 1098,
      "only_opendigger": 87894,
      "only_gharchive": 98,
      "only_gharchive_min_time": "2026-10-24 00:01:25.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:55.000000"
    },
    {
      "type": "IssueCommentEvent",
      "opendigger_events_in_hour": 35966,
      "gharchive_events_in_hour": 486,
      "shared_ids": 455,
      "only_opendigger": 35511,
      "only_gharchive": 31,
      "only_gharchive_min_time": "2026-10-24 00:54:59.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:51.000000"
    },
    {
      "type": "IssuesEvent",
      "opendigger_events_in_hour": 30350,
      "gharchive_events_in_hour": 390,
      "shared_ids": 363,
      "only_opendigger": 29987,
      "only_gharchive": 27,
      "only_gharchive_min_time": "2026-10-24 00:55:04.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:49.000000"
    },
    {
      "type": "PullRequestReviewEvent",
      "opendigger_events_in_hour": 17092,
      "gharchive_events_in_hour": 207,
      "shared_ids": 184,
      "only_opendigger": 16908,
      "only_gharchive": 23,
      "only_gharchive_min_time": "2026-10-24 00:55:04.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:58.000000"
    },
    {
      "type": "PullRequestReviewCommentEvent",
      "opendigger_events_in_hour": 12922,
      "gharchive_events_in_hour": 167,
      "shared_ids": 156,
      "only_opendigger": 12766,
      "only_gharchive": 11,
      "only_gharchive_min_time": "2026-10-24 00:55:03.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:46.000000"
    },
    {
      "type": "WatchEvent",
      "opendigger_events_in_hour": 10783,
      "gharchive_events_in_hour": 142,
      "shared_ids": 133,
      "only_opendigger": 10650,
      "only_gharchive": 9,
      "only_gharchive_min_time": "2026-10-24 00:56:00.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:51.000000"
    },
    {
      "type": "ReleaseEvent",
      "opendigger_events_in_hour": 8226,
      "gharchive_events_in_hour": 111,
      "shared_ids": 101,
      "only_opendigger": 8125,
      "only_gharchive": 10,
      "only_gharchive_min_time": "2026-10-24 00:55:52.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:46.000000"
    },
    {
      "type": "GollumEvent",
      "opendigger_events_in_hour": 7297,
      "gharchive_events_in_hour": 93,
      "shared_ids": 88,
      "only_opendigger": 7209,
      "only_gharchive": 5,
      "only_gharchive_min_time": "2026-10-24 00:56:39.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:42.000000"
    },
    {
      "type": "ForkEvent",
      "opendigger_events_in_hour": 2515,
      "gharchive_events_in_hour": 36,
      "shared_ids": 35,
      "only_opendigger": 2480,
      "only_gharchive": 1,
      "only_gharchive_min_time": "2026-10-24 00:59:44.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:44.000000"
    },
    {
      "type": "MemberEvent",
      "opendigger_events_in_hour": 722,
      "gharchive_events_in_hour": 14,
      "shared_ids": 12,
      "only_opendigger": 710,
      "only_gharchive": 2,
      "only_gharchive_min_time": "2026-10-24 00:55:46.000000",
      "only_gharchive_max_time": "2026-10-24 00:59:35.000000"
    },
    {
      "type": "CommitCommentEvent",
      "opendigger_events_in_hour": 385,
      "gharchive_events_in_hour": 4,
      "shared_ids": 4,
      "only_opendigger": 381,
      "only_gharchive": 0,
      "only_gharchive_min_time": null,
      "only_gharchive_max_time": null
    },
    {
      "type": "PublicEvent",
      "opendigger_events_in_hour": 209,
      "gharchive_events_in_hour": 4,
      "shared_ids": 4,
      "only_opendigger": 205,
      "only_gharchive": 0,
      "only_gharchive_min_time": null,
      "only_gharchive_max_time": null
    },
    {
      "type": "DiscussionEvent",
      "opendigger_events_in_hour": 139,
      "gharchive_events_in_hour": 0,
      "shared_ids": 0,
      "only_opendigger": 139,
      "only_gharchive": 0,
      "only_gharchive_min_time": null,
      "only_gharchive_max_time": null
    }
  ],
  "github_live_api_probe": {
    "request_url": "https://api.github.com/events?per_page=100&page=1",
    "retrieved_at_utc": "2026-10-27T03:25:28.374157+00:00",
    "authentication": "none",
    "rows": 100,
    "types": {
      "CreateEvent": {
        "count": 9,
        "min_created_at": "2026-10-26T04:22:28Z",
        "max_created_at": "2026-10-26T20:47:09Z"
      },
      "DeleteEvent": {
        "count": 3,
        "min_created_at": "2026-10-26T17:14:58Z",
        "max_created_at": "2026-10-26T20:47:09Z"
      },
      "IssuesEvent": {
        "count": 1,
        "min_created_at": "2026-10-27T03:20:26Z",
        "max_created_at": "2026-10-27T03:20:26Z"
      },
      "PullRequestEvent": {
        "count": 2,
        "min_created_at": "2026-10-27T03:20:24Z",
        "max_created_at": "2026-10-27T03:20:24Z"
      },
      "PushEvent": {
        "count": 85,
        "min_created_at": "2026-10-26T04:22:28Z",
        "max_created_at": "2026-10-26T20:47:09Z"
      }
    },
    "note": "Single public API page at investigation time; different authentication/cache/time context from historical collector. No raw events saved."
  }
}