{
  "baseline": {
    "age_matched": {
      "buckets_used": 4,
      "gap": 0.11705475845134106,
      "tagged_lines_covered": 1.0,
      "tagged_rate": 0.556834102035355,
      "untagged_rate": 0.43977934358401394
    },
    "by_age": [
      {
        "from_days": 0,
        "tagged": {
          "cap_lines": 464,
          "capped_survival_rate": 0.6657314635577335,
          "commits": 484,
          "introduced": 43808,
          "largest_commit_share": 0.0827246165084003,
          "median_survival": 0.8818729232068441,
          "survival_rate": 0.5608336376917458,
          "surviving": 24569
        },
        "to_days": 30,
        "untagged": {
          "cap_lines": 346,
          "capped_survival_rate": 0.9539594843462247,
          "commits": 21,
          "introduced": 543,
          "largest_commit_share": 0.6372007366482505,
          "median_survival": 1.0,
          "survival_rate": 0.9539594843462247,
          "surviving": 518
        }
      },
      {
        "from_days": 30,
        "tagged": {
          "cap_lines": 279,
          "capped_survival_rate": 0.6773091143489584,
          "commits": 1013,
          "introduced": 70167,
          "largest_commit_share": 0.06920632206022774,
          "median_survival": 0.8260869565217391,
          "survival_rate": 0.5730471589208602,
          "surviving": 40209
        },
        "to_days": 90,
        "untagged": {
          "cap_lines": 5298,
          "capped_survival_rate": 0.48299319727891155,
          "commits": 17,
          "introduced": 9261,
          "largest_commit_share": 0.5720764496274701,
          "median_survival": 0.8315470255898969,
          "survival_rate": 0.48299319727891155,
          "surviving": 4473
        }
      },
      {
        "from_days": 90,
        "tagged": {
          "cap_lines": 290,
          "capped_survival_rate": 0.6383537892911911,
          "commits": 2073,
          "introduced": 127725,
          "largest_commit_share": 0.05362301820317088,
          "median_survival": 0.7142857142857143,
          "survival_rate": 0.5306087296926991,
          "surviving": 67772
        },
        "to_days": 180,
        "untagged": {
          "cap_lines": 5489,
          "capped_survival_rate": 0.3408946094048681,
          "commits": 5,
          "introduced": 7847,
          "largest_commit_share": 0.6995029947750733,
          "median_survival": 0.3398510242085661,
          "survival_rate": 0.3408946094048681,
          "surviving": 2675
        }
      },
      {
        "from_days": 180,
        "tagged": {
          "cap_lines": 672,
          "capped_survival_rate": 0.6053588908469618,
          "commits": 1650,
          "introduced": 202989,
          "largest_commit_share": 0.06308223598323062,
          "median_survival": 0.5,
          "survival_rate": 0.5668681554172886,
          "surviving": 115068
        },
        "to_days": 365,
        "untagged": {
          "cap_lines": 1396,
          "capped_survival_rate": 0.4525252757295971,
          "commits": 412,
          "introduced": 97768,
          "largest_commit_share": 0.0896816954422715,
          "median_survival": 0.36363636363636365,
          "survival_rate": 0.3760944276245806,
          "surviving": 36770
        }
      },
      {
        "from_days": 365,
        "tagged": {
          "cap_lines": null,
          "capped_survival_rate": null,
          "commits": 0,
          "introduced": 0,
          "largest_commit_share": null,
          "median_survival": null,
          "survival_rate": null,
          "surviving": 0
        },
        "to_days": 730,
        "untagged": {
          "cap_lines": null,
          "capped_survival_rate": null,
          "commits": 0,
          "introduced": 0,
          "largest_commit_share": null,
          "median_survival": null,
          "survival_rate": null,
          "surviving": 0
        }
      },
      {
        "from_days": 730,
        "tagged": {
          "cap_lines": null,
          "capped_survival_rate": null,
          "commits": 0,
          "introduced": 0,
          "largest_commit_share": null,
          "median_survival": null,
          "survival_rate": null,
          "surviving": 0
        },
        "to_days": null,
        "untagged": {
          "cap_lines": null,
          "capped_survival_rate": null,
          "commits": 0,
          "introduced": 0,
          "largest_commit_share": null,
          "median_survival": null,
          "survival_rate": null,
          "surviving": 0
        }
      }
    ],
    "oldest_surviving": {
      "age_days": 298,
      "commits_before": 0,
      "date": "2025-12-10",
      "introduced_before": 0,
      "tagged_commits_before": 0,
      "tagged_introduced_before": 0
    },
    "untagged": {
      "cap_lines": 1576,
      "capped_survival_rate": 0.4565720089985669,
      "commits": 455,
      "introduced": 115419,
      "largest_commit_share": 0.07596669525814641,
      "median_survival": 0.4,
      "survival_rate": 0.38499727081329765,
      "surviving": 44436
    }
  },
  "by_agent": {
    "claude-code": {
      "cap_lines": 51,
      "capped_survival_rate": 0.3137254901960784,
      "commits": 1,
      "introduced": 51,
      "largest_commit_share": 1.0,
      "median_survival": 0.3137254901960784,
      "survival_rate": 0.3137254901960784,
      "surviving": 16
    },
    "copilot": {
      "cap_lines": 411,
      "capped_survival_rate": 0.5863568948002718,
      "commits": 3404,
      "introduced": 198534,
      "largest_commit_share": 0.021794755558241913,
      "median_survival": 0.6428571428571429,
      "survival_rate": 0.5642962918190335,
      "surviving": 112032
    },
    "github-copilot": {
      "cap_lines": 512,
      "capped_survival_rate": 0.6710625123554445,
      "commits": 1815,
      "introduced": 246104,
      "largest_commit_share": 0.05203084874687124,
      "median_survival": 0.8,
      "survival_rate": 0.5508646750967071,
      "surviving": 135570
    }
  },
  "coverage": {
    "blame_flags": [
      "-w",
      "-M",
      "-C"
    ],
    "ignore_revs_file": false,
    "method": "v3",
    "sample_floor": 5,
    "shallow": false,
    "small_sample": false
  },
  "method": "v3",
  "probable": {
    "cap_lines": null,
    "capped_survival_rate": null,
    "commits": 0,
    "introduced": 0,
    "largest_commit_share": null,
    "median_survival": null,
    "survival_rate": null,
    "surviving": 0
  },
  "repository": {
    "head": "82e6543bbb4446abdac140b8ef0040873a0d81d7",
    "origin": "https://github.com/github/gh-aw-mcpg"
  },
  "total_commits": 5675,
  "verified": {
    "cap_lines": 448,
    "capped_survival_rate": 0.6279403740299208,
    "commits": 5220,
    "introduced": 444689,
    "largest_commit_share": 0.028795405328218147,
    "median_survival": 0.7071068124474348,
    "survival_rate": 0.556834102035355,
    "surviving": 247618
  }
}
