{
  "corpus": "corpus/packaging.json",
  "arms": [
    "hypothesis",
    "mutations",
    "llm-plan",
    "breakwater"
  ],
  "provider": "tokenfactory",
  "items": [
    {
      "id": "#997",
      "pr": 997,
      "title": "perf: better string building",
      "base": "1c4e8056b1c0b2efc9c68a71c7f2a1a1920db8f3",
      "head": "65092ce350ac2cc73e61d770f5d16a0957bf6e45",
      "merged": "2026-01-06",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-997-7f3e77",
          "image": "bw-pair:b6408f6a83d7d09d",
          "usd": 0.0333,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 8.3,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 3.9,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 69.4,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 6.9,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1028",
      "pr": 1028,
      "title": "perf: don't renormalize extras",
      "base": "65092ce350ac2cc73e61d770f5d16a0957bf6e45",
      "head": "b20096ccce1ca389fa1d3c4290065ab4ede370cc",
      "merged": "2026-01-06",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.requirements:Requirement",
          "run_id": "bt-1028-3e02dc",
          "image": "bw-pair:5bb20e4196737a91",
          "usd": 0.0213,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 9.7,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 3.6,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 59.5,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 11.8,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1029",
      "pr": 1029,
      "title": "perf: use fullmatch for markers too",
      "base": "c39b6da9ab11f649f5497a11628f9dfc98380bb2",
      "head": "8a805e3baac2d71958ec0d0beffbe4d51fd5795f",
      "merged": "2026-01-04",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.markers:Marker",
          "run_id": "bt-1029-95d888",
          "image": "bw-pair:8f442c507f13d5d7",
          "usd": 0.018,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 11.8,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 3.7,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 26.1,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 0.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1030",
      "pr": 1030,
      "title": "perf: translate for canonicalize_name",
      "base": "52e57f20037ff6fc40c72fffbd7905ed81c7d390",
      "head": "3803ce341b59a24c598eb7b8100d5f8d6773f63e",
      "merged": "2026-01-05",
      "after_ultra_release": false,
      "known": [
        {
          "id": "unicode-lowercase",
          "match": {
            "probe": "P1",
            "traits": "non-ascii"
          },
          "fixed_by": 1064,
          "status": "verified",
          "discovered_by": "breakwater"
        }
      ],
      "targets": [
        {
          "target": "packaging.utils:canonicalize_name",
          "run_id": "bt-1030-0d870d",
          "image": "bw-pair:d09088ff31a7e098",
          "usd": 0.0274,
          "harvested": 69,
          "arms": {
            "hypothesis": {
              "classes": [
                "P1|value|differs|control+non-ascii",
                "P1|value|differs|control+non-ascii+whitespace",
                "P1|value|differs|non-ascii",
                "P1|value|differs|non-ascii+whitespace",
                "P3|gt|False|True",
                "P3|lt|True|False"
              ],
              "known": [
                "unicode-lowercase"
              ],
              "seconds": 10.4,
              "error": null
            },
            "mutations": {
              "classes": [
                "P1|value|differs|non-ascii"
              ],
              "known": [
                "unicode-lowercase"
              ],
              "seconds": 3.7,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P1|value|differs|control+non-ascii",
                "P1|value|differs|non-ascii",
                "P1|value|differs|non-ascii+whitespace",
                "P2|outcome|exc:builtins.TypeError|exc:builtins.AttributeError|nested",
                "P3|gt|False|True",
                "P3|gt|True|False",
                "P3|lt|False|True",
                "P3|lt|True|False"
              ],
              "known": [
                "unicode-lowercase"
              ],
              "seconds": 62.1,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P1|value|differs|non-ascii",
                "P3|gt|False|True",
                "P3|gt|True|False",
                "P3|lt|False|True",
                "P3|lt|True|False"
              ],
              "known": [
                "unicode-lowercase"
              ],
              "seconds": 3.0,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P1|value|differs|non-ascii",
              "probe": "P1",
              "detail": "value",
              "args": [
                [
                  "İ"
                ]
              ],
              "base": "i̇",
              "head": "İ",
              "found_by": [
                "A1/s2",
                "A4/s4",
                "A5/s2",
                "seed",
                "mutation:separators",
                "mutation:signs",
                "mutation:edges",
                "mutation:case",
                "batch"
              ]
            },
            {
              "signature": "P1|value|differs|non-ascii+whitespace",
              "probe": "P1",
              "detail": "value",
              "args": [
                [
                  "İ "
                ]
              ],
              "base": "i̇ ",
              "head": "İ ",
              "found_by": [
                "mutation:whitespace-outer",
                "mutation:whitespace-inner"
              ]
            },
            {
              "signature": "P1|value|differs|control+non-ascii",
              "probe": "P1",
              "detail": "value",
              "args": [
                [
                  "İ\u0000"
                ]
              ],
              "base": "i̇\u0000",
              "head": "İ\u0000",
              "found_by": [
                "mutation:edges"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.TypeError|exc:builtins.AttributeError|nested",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  [
                    "İ"
                  ]
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.TypeError"
              },
              "head": {
                "status": "exc",
                "exc": "builtins.AttributeError"
              },
              "found_by": [
                "A1/s4",
                "A3/s1",
                "batch"
              ]
            },
            {
              "signature": "P3|gt|False|True",
              "probe": "P3",
              "detail": "gt",
              "args": [
                [
                  "İ"
                ],
                [
                  "py3"
                ]
              ],
              "base": false,
              "head": true,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|gt|True|False",
              "probe": "P3",
              "detail": "gt",
              "args": [
                [
                  "ẞ"
                ],
                [
                  "K"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|lt|True|False",
              "probe": "P3",
              "detail": "lt",
              "args": [
                [
                  "İ"
                ],
                [
                  "py3"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|lt|False|True",
              "probe": "P3",
              "detail": "lt",
              "args": [
                [
                  "ẞ"
                ],
                [
                  "K"
                ]
              ],
              "base": false,
              "head": true,
              "found_by": [
                "seed",
                "focus"
              ]
            }
          ],
          "perf": null
        }
      ]
    },
    {
      "id": "#1032",
      "pr": 1032,
      "title": "perf: add __slots__ to Nodes",
      "base": "842c16cef598bf80178b3894b7039b69cca3621c",
      "head": "c39b6da9ab11f649f5497a11628f9dfc98380bb2",
      "merged": "2026-01-02",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.markers:Marker",
          "run_id": "bt-1032-961ae1",
          "image": "bw-pair:f8c16265598b425b",
          "usd": 0.0148,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 5.9,
              "error": null
            },
            "mutations": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.AttributeError"
              ],
              "known": [],
              "seconds": 3.1,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.AttributeError"
              ],
              "known": [],
              "seconds": 25.3,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.AttributeError"
              ],
              "known": [],
              "seconds": 5.0,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P4|base->head load|loads|exc:builtins.AttributeError",
              "probe": "P4",
              "detail": "base->head load",
              "args": [
                [
                  "os_name == 'foo'"
                ]
              ],
              "base": "loads",
              "head": {
                "status": "exc",
                "exc": "builtins.AttributeError"
              },
              "found_by": [
                "seed",
                "tests",
                "mutation:whitespace-outer",
                "mutation:underscores",
                "mutation:whitespace-inner",
                "mutation:huge-number",
                "mutation:equivalents",
                "mutation:unicode-digits",
                "mutation:case"
              ]
            }
          ],
          "perf": null,
          "image_rescored": "bw-pair:f8c16265598b425b"
        }
      ]
    },
    {
      "id": "#1058",
      "pr": 1058,
      "title": "perf:  10% faster stripping zeros",
      "base": "350a2306700b738f487f251efa278f532b263dee",
      "head": "716beb1c0a5d7a398bf57fbd80bc2501811e616b",
      "merged": "2026-01-14",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1058-8ed63a",
          "image": "bw-pair:a09f8c41211f55ec",
          "usd": 0.0454,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 8.7,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 8.5,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 98.5,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 4.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1064",
      "pr": 1064,
      "title": "perf: dual replace",
      "base": "d5398b8bc19f3fad7b035ceb83023caf06d6e2da",
      "head": "9627a8821f09e4c55cd6e9daadb617b67c4741c2",
      "merged": "2026-01-19",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.utils:canonicalize_name",
          "run_id": "bt-1064-36d36e",
          "image": "bw-pair:810b943be062d4e3",
          "usd": 0.022,
          "harvested": 69,
          "arms": {
            "hypothesis": {
              "classes": [
                "P1|value|differs|control+non-ascii",
                "P1|value|differs|control+non-ascii+whitespace",
                "P1|value|differs|non-ascii",
                "P1|value|differs|non-ascii+whitespace",
                "P3|gt|True|False",
                "P3|lt|False|True"
              ],
              "known": [],
              "seconds": 17.1,
              "error": null
            },
            "mutations": {
              "classes": [
                "P1|value|differs|non-ascii"
              ],
              "known": [],
              "seconds": 3.8,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P1|value|differs|control+non-ascii",
                "P1|value|differs|non-ascii",
                "P1|value|differs|non-ascii+whitespace",
                "P3|gt|False|True",
                "P3|gt|True|False",
                "P3|lt|False|True",
                "P3|lt|True|False"
              ],
              "known": [],
              "seconds": 66.7,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P1|value|differs|non-ascii",
                "P3|gt|False|True",
                "P3|gt|True|False",
                "P3|lt|False|True",
                "P3|lt|True|False"
              ],
              "known": [],
              "seconds": 7.8,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P1|value|differs|non-ascii",
              "probe": "P1",
              "detail": "value",
              "args": [
                [
                  "Ä"
                ]
              ],
              "base": "Ä",
              "head": "ä",
              "found_by": [
                "A2/s4",
                "A3/s1",
                "A3/s4",
                "A4/s3",
                "A5/s1",
                "A5/s4",
                "seed",
                "mutation:separators",
                "mutation:signs",
                "mutation:case",
                "batch"
              ]
            },
            {
              "signature": "P1|value|differs|non-ascii+whitespace",
              "probe": "P1",
              "detail": "value",
              "args": [
                [
                  "Á "
                ]
              ],
              "base": "Á ",
              "head": "á ",
              "found_by": [
                "mutation:whitespace-outer",
                "mutation:whitespace-inner"
              ]
            },
            {
              "signature": "P1|value|differs|control+non-ascii",
              "probe": "P1",
              "detail": "value",
              "args": [
                [
                  "Á\u0000"
                ]
              ],
              "base": "Á\u0000",
              "head": "á\u0000",
              "found_by": [
                "mutation:edges"
              ]
            },
            {
              "signature": "P3|gt|False|True",
              "probe": "P3",
              "detail": "gt",
              "args": [
                [
                  "Á"
                ],
                [
                  "İ"
                ]
              ],
              "base": false,
              "head": true,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|gt|True|False",
              "probe": "P3",
              "detail": "gt",
              "args": [
                [
                  "İ"
                ],
                [
                  "Ä"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|lt|True|False",
              "probe": "P3",
              "detail": "lt",
              "args": [
                [
                  "Á"
                ],
                [
                  "İ"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|lt|False|True",
              "probe": "P3",
              "detail": "lt",
              "args": [
                [
                  "İ"
                ],
                [
                  "Ä"
                ]
              ],
              "base": false,
              "head": true,
              "found_by": [
                "seed",
                "focus"
              ]
            }
          ],
          "perf": null
        }
      ]
    },
    {
      "id": "#1076",
      "pr": 1076,
      "title": "perf: Stream PEP440 filtering in `SpecifierSet.filter`",
      "base": "120ce2561585cb7e857078c0a15b36780a9760fd",
      "head": "39ad033eac63d81834fef48a7d0c88f59eddf158",
      "merged": "2026-01-30",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:SpecifierSet#filter",
          "run_id": "bt-1076-a146d6",
          "image": "bw-pair:be705d37816b5401",
          "usd": 0.0483,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 7.8,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 4.5,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 64.7,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 3.7,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1081",
      "pr": 1081,
      "title": "perf: Skip `__replace__` in Specifier comparison if not needed",
      "base": "481295f7161dcef25ac3626c7f56ea363b424b5c",
      "head": "0e88c2d78a5ee6cfeb37eef93c75f2b0fc5361c4",
      "merged": "2026-02-09",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:Specifier",
          "run_id": "bt-1081-38a993",
          "image": "bw-pair:ff8050a1e55ba0d9",
          "usd": 0.0302,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 11.7,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 3.9,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 31.7,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 0.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1082",
      "pr": 1082,
      "title": "perf: Add fast path for parsing simple versions (digits and dots only)",
      "base": "59f183fe90da403e41eef339ce9088bda0fe4cd3",
      "head": "ee13ba2c1c9a01c97a08ca9d98ff9fa6f0a0a67b",
      "merged": "2026-02-11",
      "after_ultra_release": false,
      "known": [
        {
          "id": "oversized-int-exception",
          "match": {
            "probe": "P2",
            "traits": "long-digits"
          },
          "fixed_by": 1155,
          "status": "verified"
        }
      ],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1082-3b9756",
          "image": "bw-pair:3f8cc97a2a8a52dc",
          "usd": 0.0796,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 12.6,
              "error": null
            },
            "mutations": {
              "classes": [
                "P2|outcome|exc:builtins.ValueError|exc:packaging.version.InvalidVersion|long-digits"
              ],
              "known": [
                "oversized-int-exception"
              ],
              "seconds": 4.5,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P2|outcome|exc:builtins.TypeError|exc:builtins.AttributeError|nested",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.version.InvalidVersion|long-digits"
              ],
              "known": [
                "oversized-int-exception"
              ],
              "seconds": 97.8,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 5.3,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P2|outcome|exc:builtins.TypeError|exc:builtins.AttributeError|nested",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  [
                    "1"
                  ]
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.TypeError"
              },
              "head": {
                "status": "exc",
                "exc": "builtins.AttributeError"
              },
              "found_by": [
                "A3/s1"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.ValueError|exc:packaging.version.InvalidVersion|long-digits",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "exc",
                "exc": "packaging.version.InvalidVersion"
              },
              "found_by": [
                "mutation:huge-number"
              ]
            }
          ],
          "perf": null
        }
      ]
    },
    {
      "id": "1082@61967cca",
      "pr": 1082,
      "title": "perf: fast path for simple versions (intermediate commit 61967cca)",
      "base": "59f183fe90da403e41eef339ce9088bda0fe4cd3",
      "head": "61967cca278dc51389b8973ba65bbbf23eaa3eda",
      "merged": "2026-02-11",
      "after_ultra_release": false,
      "known": [
        {
          "id": "unicode-digits",
          "match": {
            "probe": "P2",
            "traits": "non-ascii"
          },
          "fixed_by": "review",
          "status": "verified"
        },
        {
          "id": "inner-whitespace",
          "match": {
            "probe": "P2",
            "traits": "whitespace"
          },
          "fixed_by": "review",
          "status": "verified"
        },
        {
          "id": "oversized-int-exception",
          "match": {
            "probe": "P2",
            "traits": "long-digits"
          },
          "fixed_by": 1155,
          "status": "verified"
        }
      ],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1082-61967cca-8aeaff",
          "image": "bw-pair:348e2d05c100a5f9",
          "usd": 0.0467,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 7.7,
              "error": null
            },
            "mutations": {
              "classes": [
                "P2|outcome|exc:builtins.ValueError|exc:packaging.version.InvalidVersion|long-digits",
                "P2|outcome|exc:packaging.version.InvalidVersion|ok|whitespace"
              ],
              "known": [
                "inner-whitespace",
                "oversized-int-exception"
              ],
              "seconds": 4.3,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P2|outcome|exc:builtins.ValueError|exc:packaging.version.InvalidVersion|long-digits+whitespace",
                "P2|outcome|exc:packaging.version.InvalidVersion|ok|long-digits+non-ascii",
                "P2|outcome|exc:packaging.version.InvalidVersion|ok|non-ascii",
                "P2|outcome|exc:packaging.version.InvalidVersion|ok|non-ascii+whitespace",
                "P2|outcome|exc:packaging.version.InvalidVersion|ok|whitespace"
              ],
              "known": [
                "unicode-digits",
                "inner-whitespace",
                "oversized-int-exception"
              ],
              "seconds": 85.2,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P2|outcome|exc:packaging.version.InvalidVersion|ok|non-ascii"
              ],
              "known": [
                "unicode-digits"
              ],
              "seconds": 4.8,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P2|outcome|exc:packaging.version.InvalidVersion|ok|non-ascii",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "０"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "packaging.version.InvalidVersion"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": "0",
                  "repr": "<Version('0')>",
                  "attr:release": [
                    0
                  ],
                  "attr:public": "0"
                }
              },
              "found_by": [
                "A1/s1",
                "A1/s3",
                "A4/s3",
                "A4/s4",
                "seed",
                "mutation:separators",
                "mutation:edges",
                "mutation:equivalents",
                "mutation:unicode-digits",
                "batch"
              ]
            },
            {
              "signature": "P2|outcome|exc:packaging.version.InvalidVersion|ok|non-ascii+whitespace",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "０ "
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "packaging.version.InvalidVersion"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": "0",
                  "repr": "<Version('0')>",
                  "attr:release": [
                    0
                  ],
                  "attr:public": "0"
                }
              },
              "found_by": [
                "mutation:unicode-digits",
                "mutation:whitespace-outer",
                "mutation:whitespace-inner"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.ValueError|exc:packaging.version.InvalidVersion|long-digits+whitespace",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  " 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 "
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "exc",
                "exc": "packaging.version.InvalidVersion"
              },
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P2|outcome|exc:packaging.version.InvalidVersion|ok|long-digits+non-ascii",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.２.3"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "packaging.version.InvalidVersion"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": "1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.2.3",
                  "repr": "<Version('1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.2.3')>",
                  "attr:release": [
                    "<int 4300 digits>",
                    2,
                    3
                  ],
                  "attr:public": "1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.2.3"
                }
              },
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P2|outcome|exc:packaging.version.InvalidVersion|ok|whitespace",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  " 1. 2.3 "
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "packaging.version.InvalidVersion"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": "1.2.3",
                  "repr": "<Version('1.2.3')>",
                  "attr:release": [
                    1,
                    2,
                    3
                  ],
                  "attr:public": "1.2.3"
                }
              },
              "found_by": [
                "mutation:whitespace-inner"
              ]
            }
          ],
          "perf": null
        }
      ]
    },
    {
      "id": "#1083",
      "pr": 1083,
      "title": "perf: Add fast path for `Version` to `Version` comparison by skipping `_key` property",
      "base": "cd1520c475213d45df1cfe0e7b9d27e3166ef660",
      "head": "659955c8a0f6025b4dd27dd0a4bce7e640b40bfe",
      "merged": "2026-03-06",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1083-ec6668",
          "image": "bw-pair:4c94589505b32cde",
          "usd": 0.0352,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 12.7,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 4.8,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 49.0,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.7,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1105",
      "pr": 1105,
      "title": "perf: Speed up complex SpecifierSet filtering by implementing cost based ordering",
      "base": "9b972011a53185a3c9be97dc1f86c042307e0e5a",
      "head": "8810e9e66e2a137af5b16072c1ceb17427a2b21c",
      "merged": "2026-03-08",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:SpecifierSet#filter",
          "run_id": "bt-1105-0987b9",
          "image": "bw-pair:9afc68b04e0ce424",
          "usd": 0.0576,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 10.7,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 13.2,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 66.1,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 4.4,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1106",
      "pr": 1106,
      "title": "perf: simply Specifier regex",
      "base": "e3af78f17a5230ffdc846e0b08f3e6e47b3edcfe",
      "head": "e839d73030b410d4156e6a496249fbdb1e498fab",
      "merged": "2026-03-09",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:Specifier",
          "run_id": "bt-1106-bb45d9",
          "image": "bw-pair:6c9a610c08b433b1",
          "usd": 0.0896,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 9.9,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 7.5,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 92.6,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 6.9,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1108",
      "pr": 1108,
      "title": "perf: SpecifierSet use tuple instead of frozenset for `_specs`",
      "base": "20f1523cf37dc5a0e85e7c7dc0070dfc4a09653a",
      "head": "f59d6ee9afe2330cc9524f825417ee1c31e5e684",
      "merged": "2026-03-07",
      "after_ultra_release": false,
      "known": [
        {
          "id": "dedup-equality",
          "match": {
            "probe": "P3",
            "detail": "eq"
          },
          "fixed_by": 1109,
          "status": "verified"
        },
        {
          "id": "dedup-str-len",
          "match": {
            "probe": "P1"
          },
          "fixed_by": 1109,
          "status": "verified"
        },
        {
          "id": "old-pickles-break-comparison",
          "match": {
            "probe": "P4"
          },
          "fixed_by": "26.2",
          "status": "verified"
        }
      ],
      "targets": [
        {
          "target": "packaging.specifiers:SpecifierSet",
          "run_id": "bt-1108-2f9809",
          "image": "bw-pair:16f20a2b68c37e6b",
          "usd": 0.0496,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [
                "P4|base->head eq-fresh|True|<exc:builtins.AttributeError>"
              ],
              "known": [
                "old-pickles-break-comparison"
              ],
              "seconds": 9.0,
              "error": null
            },
            "mutations": {
              "classes": [
                "P1|len|differs|plain",
                "P1|str|differs|plain",
                "P2|outcome|exc:builtins.AssertionError|ok|long-digits",
                "P2|outcome|exc:builtins.ValueError|ok|long-digits",
                "P4|base->head eq-fresh|True|<exc:builtins.AttributeError>",
                "P4|base->head eq-fresh|True|False"
              ],
              "known": [
                "dedup-str-len",
                "old-pickles-break-comparison"
              ],
              "seconds": 3.1,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P1|len|differs|long-digits",
                "P1|len|differs|non-ascii+whitespace",
                "P1|len|differs|plain",
                "P1|len|differs|whitespace",
                "P1|str|differs|long-digits",
                "P1|str|differs|non-ascii+whitespace",
                "P1|str|differs|plain",
                "P1|str|differs|whitespace",
                "P2|outcome|exc:builtins.AssertionError|ok|long-digits",
                "P2|outcome|exc:builtins.AssertionError|ok|long-digits+whitespace",
                "P2|outcome|exc:builtins.ValueError|ok|long-digits",
                "P3|eq|True|False",
                "P3|hash_eq|True|False",
                "P4|base->head eq-fresh|True|<exc:builtins.AttributeError>",
                "P4|base->head eq-fresh|True|False"
              ],
              "known": [
                "dedup-equality",
                "dedup-str-len",
                "old-pickles-break-comparison"
              ],
              "seconds": 79.4,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P1|len|differs|plain",
                "P1|len|differs|whitespace",
                "P1|str|differs|plain",
                "P1|str|differs|whitespace",
                "P3|eq|True|False",
                "P3|hash_eq|True|False",
                "P4|base->head eq-fresh|True|<exc:builtins.AttributeError>",
                "P4|base->head eq-fresh|True|False"
              ],
              "known": [
                "dedup-equality",
                "dedup-str-len",
                "old-pickles-break-comparison"
              ],
              "seconds": 3.9,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P1|len|differs|plain",
              "probe": "P1",
              "detail": "len",
              "args": [
                [
                  ">=01.0,>=1.0"
                ]
              ],
              "base": 1,
              "head": 2,
              "found_by": [
                "A4/s1",
                "seed",
                "mutation:equivalents",
                "mutation:separators"
              ]
            },
            {
              "signature": "P1|len|differs|whitespace",
              "probe": "P1",
              "detail": "len",
              "args": [
                [
                  ">= 1.0,>=1.0"
                ]
              ],
              "base": 1,
              "head": 2,
              "found_by": [
                "seed",
                "mutation:whitespace-outer",
                "mutation:whitespace-inner",
                "mutation:equivalents",
                "mutation:separators"
              ]
            },
            {
              "signature": "P1|len|differs|non-ascii+whitespace",
              "probe": "P1",
              "detail": "len",
              "args": [
                [
                  " >=1.0,>=1.0.0 "
                ]
              ],
              "base": 1,
              "head": 2,
              "found_by": [
                "mutation:whitespace-outer"
              ]
            },
            {
              "signature": "P1|len|differs|long-digits",
              "probe": "P1",
              "detail": "len",
              "args": [
                [
                  ">=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0,>=1.0.0,>=1.0"
                ]
              ],
              "base": 2,
              "head": 3,
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P1|str|differs|plain",
              "probe": "P1",
              "detail": "str",
              "args": [
                [
                  ">=01.0,>=1.0"
                ]
              ],
              "base": ">=01.0",
              "head": ">=01.0,>=1.0",
              "found_by": [
                "A4/s1",
                "seed",
                "mutation:equivalents",
                "mutation:separators"
              ]
            },
            {
              "signature": "P1|str|differs|whitespace",
              "probe": "P1",
              "detail": "str",
              "args": [
                [
                  ">= 1.0,>=1.0"
                ]
              ],
              "base": ">=1.0",
              "head": ">=1.0,>=1.0",
              "found_by": [
                "seed",
                "mutation:whitespace-outer",
                "mutation:whitespace-inner",
                "mutation:equivalents",
                "mutation:separators"
              ]
            },
            {
              "signature": "P1|str|differs|non-ascii+whitespace",
              "probe": "P1",
              "detail": "str",
              "args": [
                [
                  " >=1.0,>=1.0.0 "
                ]
              ],
              "base": ">=1.0",
              "head": ">=1.0,>=1.0.0",
              "found_by": [
                "mutation:whitespace-outer"
              ]
            },
            {
              "signature": "P1|str|differs|long-digits",
              "probe": "P1",
              "detail": "str",
              "args": [
                [
                  ">=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0,>=1.0.0,>=1.0"
                ]
              ],
              "base": ">=1.0.0,>=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0",
              "head": ">=1.0,>=1.0.0,>=1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0",
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.AssertionError|ok|long-digits",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  ">=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0,>=1.0"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.AssertionError"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": ">=1.0,>=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0",
                  "len": 2
                }
              },
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.AssertionError|ok|long-digits+whitespace",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  ">=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0, >=1.0.0"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.AssertionError"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": ">=1.0.0,>=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000.0",
                  "len": 2
                }
              },
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.ValueError|ok|long-digits",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "<=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000!0.1"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "ok",
                "obs": {
                  "str": "<=10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000!0.1",
                  "len": 1
                }
              },
              "found_by": [
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P3|eq|True|False",
              "probe": "P3",
              "detail": "eq",
              "args": [
                [
                  ">=01.0,>=1.0"
                ],
                [
                  ">=1.0,>=1.0"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P3|hash_eq|True|False",
              "probe": "P3",
              "detail": "hash_eq",
              "args": [
                [
                  ">=01.0,>=1.0"
                ],
                [
                  ">=1.0,>=1.0"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "focus"
              ]
            },
            {
              "signature": "P4|base->head eq-fresh|True|False",
              "probe": "P4",
              "detail": "base->head eq-fresh",
              "args": [
                [
                  ">=01.0,>=1.0"
                ]
              ],
              "base": true,
              "head": false,
              "found_by": [
                "seed",
                "mutation:whitespace-outer",
                "mutation:equivalents",
                "mutation:whitespace-inner",
                "mutation:separators",
                "mutation:huge-number"
              ]
            },
            {
              "signature": "P4|base->head eq-fresh|True|<exc:builtins.AttributeError>",
              "probe": "P4",
              "detail": "base->head eq-fresh",
              "args": [
                [
                  ""
                ]
              ],
              "base": true,
              "head": "<exc:builtins.AttributeError>",
              "found_by": [
                "seed",
                "tests",
                "mutation:huge-number",
                "mutation:edges",
                "mutation:equivalents",
                "mutation:case",
                "mutation:whitespace-outer",
                "mutation:whitespace-inner",
                "batch"
              ]
            }
          ],
          "perf": null,
          "image_rescored": "bw-pair:16f20a2b68c37e6b"
        }
      ]
    },
    {
      "id": "#1111",
      "pr": 1111,
      "title": "perf: Speed up wildcard comparison",
      "base": "210d878577f7f5d95b50904063c889139654813a",
      "head": "e3af78f17a5230ffdc846e0b08f3e6e47b3edcfe",
      "merged": "2026-03-09",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:Specifier#contains",
          "run_id": "bt-1111-fafb8b",
          "image": "bw-pair:79d12e24d8354ad9",
          "usd": 0.1157,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 6.9,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.5,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 135.4,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.2,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1115",
      "pr": 1115,
      "title": "perf: skip hash property",
      "base": "e839d73030b410d4156e6a496249fbdb1e498fab",
      "head": "baa9ea8c7fa773fc4039d090bc7ec6452b860ec6",
      "merged": "2026-03-11",
      "after_ultra_release": false,
      "known": [],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1115-bf552c",
          "image": "bw-pair:b75c39f11bbb1fbf",
          "usd": 0.0405,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 12.4,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 3.6,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 49.4,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 0.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null,
          "image_rescored": "bw-pair:b75c39f11bbb1fbf"
        }
      ]
    },
    {
      "id": "#1116",
      "pr": 1116,
      "title": "perf: Overhaul `_cmpkey` to remove use of custom objects",
      "base": "baa9ea8c7fa773fc4039d090bc7ec6452b860ec6",
      "head": "f2bbd4f578644865bc5cb2534768e46563ee7f66",
      "merged": "2026-03-11",
      "after_ultra_release": false,
      "known": [
        {
          "id": "old-pickles-fail-to-load",
          "match": {
            "probe": "P4"
          },
          "fixed_by": 1163,
          "status": "verified"
        }
      ],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1116-e64a53",
          "image": "bw-pair:ee5fda034cdd7462",
          "usd": 0.0894,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 6.9,
              "error": null
            },
            "mutations": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.ModuleNotFoundError"
              ],
              "known": [
                "old-pickles-fail-to-load"
              ],
              "seconds": 2.7,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.ModuleNotFoundError"
              ],
              "known": [
                "old-pickles-fail-to-load"
              ],
              "seconds": 114.3,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.ModuleNotFoundError"
              ],
              "known": [
                "old-pickles-fail-to-load"
              ],
              "seconds": 3.0,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P4|base->head load|loads|exc:builtins.ModuleNotFoundError",
              "probe": "P4",
              "detail": "base->head load",
              "args": [
                [
                  "0"
                ]
              ],
              "base": "loads",
              "head": {
                "status": "exc",
                "exc": "builtins.ModuleNotFoundError"
              },
              "found_by": [
                "seed",
                "tests",
                "mutation:whitespace-outer",
                "mutation:huge-number",
                "mutation:case",
                "mutation:equivalents",
                "mutation:separators",
                "mutation:edges"
              ]
            }
          ],
          "perf": null,
          "image_rescored": "bw-pair:ee5fda034cdd7462"
        }
      ]
    },
    {
      "id": "#1118",
      "pr": 1118,
      "title": "perf: Cache `Version` hash value in dedicated slot",
      "base": "f2bbd4f578644865bc5cb2534768e46563ee7f66",
      "head": "1676a10cdad3f6183dc7f738d3a30950c67199a4",
      "merged": "2026-03-13",
      "after_ultra_release": false,
      "known": [
        {
          "id": "hash-cache-copy",
          "match": {
            "probe": "P3"
          },
          "fixed_by": 1242,
          "status": "candidate"
        }
      ],
      "targets": [
        {
          "target": "packaging.version:Version",
          "run_id": "bt-1118-0b0b01",
          "image": "bw-pair:4ccf3cc09b8d136b",
          "usd": 0.0439,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 14.1,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 4.3,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 84.8,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 1.6,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1147",
      "pr": 1147,
      "title": "perf: add __slots__ to Marker",
      "base": "04a7600a21febca084022d88c6684f1aedf81c8a",
      "head": "76cc6298254887e17d6b39df0425a4b6c2f1714a",
      "merged": "2026-04-05",
      "after_ultra_release": false,
      "known": [
        {
          "id": "marker-pickle",
          "match": {
            "probe": "P4"
          },
          "fixed_by": 1171,
          "status": "candidate"
        }
      ],
      "targets": [
        {
          "target": "packaging.markers:Marker",
          "run_id": "bt-1147-c49b2a",
          "image": "bw-pair:e33c8d8e1355cf11",
          "usd": 0.0165,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 5.1,
              "error": null
            },
            "mutations": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.AttributeError"
              ],
              "known": [
                "marker-pickle"
              ],
              "seconds": 2.1,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.AttributeError"
              ],
              "known": [
                "marker-pickle"
              ],
              "seconds": 35.5,
              "error": null
            },
            "llm-plan": {
              "classes": [
                "P4|base->head load|loads|exc:builtins.AttributeError"
              ],
              "known": [
                "marker-pickle"
              ],
              "seconds": 9.1,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P4|base->head load|loads|exc:builtins.AttributeError",
              "probe": "P4",
              "detail": "base->head load",
              "args": [
                [
                  "\"b\" > \"a\""
                ]
              ],
              "base": "loads",
              "head": {
                "status": "exc",
                "exc": "builtins.AttributeError"
              },
              "found_by": [
                "seed",
                "tests",
                "mutation:unicode-digits",
                "mutation:whitespace-outer",
                "mutation:huge-number",
                "mutation:equivalents",
                "mutation:whitespace-inner",
                "mutation:separators",
                "mutation:underscores",
                "mutation:case"
              ]
            }
          ],
          "perf": null,
          "image_rescored": "bw-pair:e33c8d8e1355cf11"
        }
      ]
    },
    {
      "id": "#1236",
      "pr": 1236,
      "title": "perf: simply work done in parse_tag a bit",
      "base": "e6cd4be75370b9730d70c7397ca2f873dae18f54",
      "head": "1529771b80cf6a327afdf33a8a0e7a96ac3f428f",
      "merged": "2026-06-09",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.tags:parse_tag",
          "run_id": "bt-1236-831e4b",
          "image": "bw-pair:d9b82063b49a1e43",
          "usd": 0.1321,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|empty",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|plain",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|whitespace"
              ],
              "known": [],
              "seconds": 7.0,
              "error": null
            },
            "mutations": {
              "classes": [
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|control",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|empty",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|plain",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|whitespace"
              ],
              "known": [],
              "seconds": 3.2,
              "error": null
            },
            "breakwater": {
              "classes": [
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|control",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|empty",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|plain",
                "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|whitespace"
              ],
              "known": [],
              "seconds": 93.1,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 0.0,
              "error": null
            }
          },
          "findings": [
            {
              "signature": "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|whitespace",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "Ensure platform tags normalize spaces to underscores."
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "exc",
                "exc": "packaging.tags.InvalidTag"
              },
              "found_by": [
                "tests",
                "mutation:case",
                "mutation:signs"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|plain",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  "."
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "exc",
                "exc": "packaging.tags.InvalidTag"
              },
              "found_by": [
                "tests",
                "mutation:signs",
                "mutation:separators",
                "mutation:case"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|empty",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  ""
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "exc",
                "exc": "packaging.tags.InvalidTag"
              },
              "found_by": [
                "mutation:edges"
              ]
            },
            {
              "signature": "P2|outcome|exc:builtins.ValueError|exc:packaging.tags.InvalidTag|control",
              "probe": "P2",
              "detail": "outcome",
              "args": [
                [
                  ".\u0000"
                ]
              ],
              "base": {
                "status": "exc",
                "exc": "builtins.ValueError"
              },
              "head": {
                "status": "exc",
                "exc": "packaging.tags.InvalidTag"
              },
              "found_by": [
                "mutation:edges"
              ]
            }
          ],
          "perf": null
        }
      ]
    },
    {
      "id": "#1250",
      "pr": 1250,
      "title": "perf(markers): cache the default environment",
      "base": "4c663c9ef5e1ec4f64b01ea9a61c981890a56407",
      "head": "cf100d20e09c270cb6e19e72edbd0d40728de501",
      "merged": "2026-07-10",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.markers:Marker#evaluate",
          "run_id": "bt-1250-948425",
          "image": "bw-pair:851ff7e1fccca52d",
          "usd": 0.0312,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 5.1,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.2,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 39.3,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1253",
      "pr": 1253,
      "title": "perf(specifiers): keep range caches across canonicalization",
      "base": "26b89a05f6f404dbfd808f6ac60d744e8a5e0386",
      "head": "e64c20eb7a854c72710d4c962bc8a95f343230e6",
      "merged": "2026-06-16",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:SpecifierSet#contains",
          "run_id": "bt-1253-4ad193",
          "image": "bw-pair:6fade3cf7634d561",
          "usd": 0.0559,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 4.9,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 1.9,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 57.3,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1256",
      "pr": 1256,
      "title": "perf(utils): precompile the wheel project-name pattern",
      "base": "54c697714e19da8659b67b5e96eb12a1f8250f9d",
      "head": "d2ac6ba3f819cb5c81d79f4820db205d6f8bc126",
      "merged": "2026-06-13",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.utils:parse_wheel_filename",
          "run_id": "bt-1256-74a808",
          "image": "bw-pair:4fb0fb81fd63864a",
          "usd": 0.1068,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 5.1,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.1,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 94.3,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 1.9,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1258",
      "pr": 1258,
      "title": "perf: add __slots__ to token classes",
      "base": "e7f0351352783a8a2f17f8fe15d8504f604468eb",
      "head": "bce44a178e0033b51200880de3a1cb9bfadfb849",
      "merged": "2026-06-13",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.requirements:Requirement",
          "run_id": "bt-1258-40f7e2",
          "image": "bw-pair:bc22d3399fde3139",
          "usd": 0.0098,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 4.7,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 1.9,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 16.9,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1259",
      "pr": 1259,
      "title": "perf(specifiers): push PEP 440 logic into the range engine",
      "base": "155760e37acbe24bf82444f21e805006ef0b58c8",
      "head": "664f049980f1873c458de72a449003b83173f445",
      "merged": "2026-06-15",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.specifiers:SpecifierSet#contains",
          "run_id": "bt-1259-562491",
          "image": "bw-pair:b2b8cb16aee35160",
          "usd": 0.082,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 6.0,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.7,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 77.5,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.1,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1320",
      "pr": 1320,
      "title": "perf: add __slots__ to Requirement",
      "base": "2b6726cec7bd55fd3adda07054d0a41288d44eba",
      "head": "d5fedc90bba333ed0962ba5dfb7072d38f2c1d84",
      "merged": "2026-07-07",
      "after_ultra_release": true,
      "known": [
        {
          "id": "requirement-pickle",
          "match": {
            "probe": "P4"
          },
          "fixed_by": 1171,
          "status": "candidate"
        }
      ],
      "targets": [
        {
          "target": "packaging.requirements:Requirement",
          "run_id": "bt-1320-9c396e",
          "image": "bw-pair:f8d0aa2a4ebfdaf6",
          "usd": 0.1076,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 4.3,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.0,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 85.6,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.0,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1371",
      "pr": 1371,
      "title": "perf(markers): speed up _format_marker and benchmark str(Marker)",
      "base": "46980084996620ed1606765f7c5946c99d3c0618",
      "head": "9483cb8a744606bdbad0438f01d3026a1ce4826f",
      "merged": "2026-09-25",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.markers:Marker",
          "run_id": "bt-1371-1894a8",
          "image": "bw-pair:8188a01b7bde4781",
          "usd": 0.1,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 4.6,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.0,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 104.7,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 2.2,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    },
    {
      "id": "#1429",
      "pr": 1429,
      "title": "perf(parser): avoid literal_eval for plain marker strings",
      "base": "f7c930eb18b556930564c1131fde78e576352ddc",
      "head": "d17cfaf0b77a5690f03087359e7c8d665a3c728d",
      "merged": "2026-10-05",
      "after_ultra_release": true,
      "known": [],
      "targets": [
        {
          "target": "packaging.markers:Marker",
          "run_id": "bt-1429-4dae1a",
          "image": "bw-pair:dac87e5ea56680f4",
          "usd": 0.0323,
          "harvested": 80,
          "arms": {
            "hypothesis": {
              "classes": [],
              "known": [],
              "seconds": 4.5,
              "error": null
            },
            "mutations": {
              "classes": [],
              "known": [],
              "seconds": 2.1,
              "error": null
            },
            "breakwater": {
              "classes": [],
              "known": [],
              "seconds": 36.1,
              "error": null
            },
            "llm-plan": {
              "classes": [],
              "known": [],
              "seconds": 1.8,
              "error": null
            }
          },
          "findings": [],
          "perf": null
        }
      ]
    }
  ],
  "summary": {
    "items": 29,
    "known_verified": 9,
    "known_candidate": 3,
    "caught_verified": {
      "hypothesis": 2,
      "mutations": 7,
      "llm-plan": 6,
      "breakwater": 9
    },
    "caught_candidate": {
      "hypothesis": 0,
      "mutations": 1,
      "llm-plan": 1,
      "breakwater": 1
    },
    "items_with_classes": {
      "hypothesis": 4,
      "mutations": 9,
      "llm-plan": 7,
      "breakwater": 9
    },
    "usd": 1.5827,
    "perf_items_slower": 0,
    "provider": "tokenfactory"
  },
  "corrections": [
    {
      "item": "#1115",
      "target": "packaging.version:Version",
      "image": "bw-pair:b75c39f11bbb1fbf",
      "removed": {
        "mutations": [
          "P4|base->head eq-fresh|True|False"
        ],
        "breakwater": [
          "P4|base->head eq-fresh|True|False"
        ]
      },
      "note": "P4 round-trip control: a pickle class only counts if the object survives a round trip on the version that pickled it"
    }
  ]
}