{
  "baseline": {
    "age_matched": {
      "buckets_used": 4,
      "gap": -0.12285925738622128,
      "tagged_lines_covered": 0.9589835880630692,
      "tagged_rate": 0.6313231751722592,
      "untagged_rate": 0.7541824325584805
    },
    "by_age": [
      {
        "from_days": 0,
        "tagged": {
          "cap_lines": 1933,
          "capped_survival_rate": 0.820890635232482,
          "commits": 4,
          "introduced": 3054,
          "largest_commit_share": 0.6329404060248854,
          "median_survival": 0.8607656046524074,
          "survival_rate": 0.820890635232482,
          "surviving": 2507
        },
        "to_days": 30,
        "untagged": {
          "cap_lines": 873,
          "capped_survival_rate": 0.7635948334956509,
          "commits": 88,
          "introduced": 29227,
          "largest_commit_share": 0.05535977007561502,
          "median_survival": 0.75,
          "survival_rate": 0.7669962705717316,
          "surviving": 22417
        }
      },
      {
        "from_days": 30,
        "tagged": {
          "cap_lines": 2095,
          "capped_survival_rate": 0.7372699019842218,
          "commits": 5,
          "introduced": 4183,
          "largest_commit_share": 0.5008367200573751,
          "median_survival": 0.8334154756037457,
          "survival_rate": 0.7372699019842218,
          "surviving": 3084
        },
        "to_days": 90,
        "untagged": {
          "cap_lines": 1025,
          "capped_survival_rate": 0.8321080856911552,
          "commits": 105,
          "introduced": 28954,
          "largest_commit_share": 0.07594805553636803,
          "median_survival": 0.7692307692307693,
          "survival_rate": 0.8377080886924086,
          "surviving": 24255
        }
      },
      {
        "from_days": 90,
        "tagged": {
          "cap_lines": 550,
          "capped_survival_rate": 0.7755126818586592,
          "commits": 26,
          "introduced": 6266,
          "largest_commit_share": 0.4004149377593361,
          "median_survival": 0.8333779750516568,
          "survival_rate": 0.8309926587934887,
          "surviving": 5207
        },
        "to_days": 180,
        "untagged": {
          "cap_lines": 962,
          "capped_survival_rate": 0.7554214698909593,
          "commits": 400,
          "introduced": 87052,
          "largest_commit_share": 0.04916601571474521,
          "median_survival": 0.8,
          "survival_rate": 0.7642788218536047,
          "surviving": 66532
        }
      },
      {
        "from_days": 180,
        "tagged": {
          "cap_lines": 1173,
          "capped_survival_rate": 0.6812531211027718,
          "commits": 166,
          "introduced": 40822,
          "largest_commit_share": 0.07373475086962912,
          "median_survival": 0.75,
          "survival_rate": 0.6728234775366224,
          "surviving": 27466
        },
        "to_days": 365,
        "untagged": {
          "cap_lines": 878,
          "capped_survival_rate": 0.6921278971160955,
          "commits": 2868,
          "introduced": 1413879,
          "largest_commit_share": 0.5894196037991936,
          "median_survival": 0.7063894523326573,
          "survival_rate": 0.8765417691330022,
          "surviving": 1239324
        }
      },
      {
        "from_days": 365,
        "tagged": {
          "cap_lines": 599,
          "capped_survival_rate": 0.46427391374239013,
          "commits": 150,
          "introduced": 20133,
          "largest_commit_share": 0.06596135697610887,
          "median_survival": 0.40267596926609556,
          "survival_rate": 0.46302091094223413,
          "surviving": 9322
        },
        "to_days": 730,
        "untagged": {
          "cap_lines": 622,
          "capped_survival_rate": 0.47674912332717506,
          "commits": 2695,
          "introduced": 389546,
          "largest_commit_share": 0.016046885348585276,
          "median_survival": 0.29761317262978076,
          "survival_rate": 0.4855883515682358,
          "surviving": 189159
        }
      },
      {
        "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": 547,
      "commits_before": 0,
      "date": "2025-04-17",
      "introduced_before": 0,
      "tagged_commits_before": 0,
      "tagged_introduced_before": 0
    },
    "untagged": {
      "cap_lines": 817,
      "capped_survival_rate": 0.6283805305111515,
      "commits": 6156,
      "introduced": 1948658,
      "largest_commit_share": 0.4276625246708247,
      "median_survival": 0.5641025641025641,
      "survival_rate": 0.7911531936337726,
      "surviving": 1541687
    }
  },
  "by_agent": {
    "gemini": {
      "cap_lines": 1003,
      "capped_survival_rate": 0.6282652129744268,
      "commits": 339,
      "introduced": 72796,
      "largest_commit_share": 0.04134842573767789,
      "median_survival": 0.6531656719309082,
      "survival_rate": 0.642178141656135,
      "surviving": 46748
    },
    "github-copilot": {
      "cap_lines": 4,
      "capped_survival_rate": 0.25,
      "commits": 1,
      "introduced": 4,
      "largest_commit_share": 1.0,
      "median_survival": 0.25,
      "survival_rate": 0.25,
      "surviving": 1
    },
    "jules": {
      "cap_lines": 442,
      "capped_survival_rate": 0.5048250904704463,
      "commits": 11,
      "introduced": 1658,
      "largest_commit_share": 0.26658624849215923,
      "median_survival": 0.6086956521739131,
      "survival_rate": 0.5048250904704463,
      "surviving": 837
    }
  },
  "coverage": {
    "blame_flags": [
      "-w",
      "-M",
      "-C"
    ],
    "ignore_revs_file": false,
    "method": "v4",
    "sample_floor": 5,
    "shallow": false,
    "small_sample": false
  },
  "method": "v4",
  "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": "ed96faedfd5571f055c44f2c9509d62321d1138d",
    "origin": "https://github.com/google-gemini/gemini-cli"
  },
  "total_commits": 6507,
  "verified": {
    "cap_lines": 992,
    "capped_survival_rate": 0.6247243047001789,
    "commits": 351,
    "introduced": 74458,
    "largest_commit_share": 0.04042547476429665,
    "median_survival": 0.6457310031565171,
    "survival_rate": 0.6390985522039271,
    "surviving": 47586
  }
}