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      "files": []
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      "title": "published core + published chapter: quality switch preserves chapter/thumbnail interactions",
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            {
              "name": "seeked",
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              "time": 0.001359,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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            {
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            {
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              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": false,
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          "time": 3.0675052,
          "paused": false,
          "mediaError": null,
          "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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      },
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    {
      "title": "published core + candidate chapter: quality switch preserves chapter/thumbnail interactions",
      "project": "webkit",
      "status": "passed",
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              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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            {
              "name": "seeked",
              "at": 3938,
              "time": 0.0012298,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
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            {
              "name": "canplay",
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              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
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            {
              "name": "playing",
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              "time": 3.0228841,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": false,
              "readyState": 4
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          ],
          "time": 3.0586607,
          "paused": false,
          "mediaError": null,
          "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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          "chapters": [
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              "title": "Updated after quality"
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        },
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          "platform": "win32",
          "errors": [],
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        }
      },
      "files": []
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    {
      "title": "candidate core + published chapter: quality switch preserves chapter/thumbnail interactions",
      "project": "webkit",
      "status": "failed",
      "retry": 0,
      "durationMs": 14202,
      "errors": [
        {
          "location": {
            "file": "D:\\github\\ArtPlayer\\test\\browser\\chapter-combinations.spec.js",
            "column": 8,
            "line": 79
          },
          "message": "Error: \u001b[2mexpect(\u001b[22m\u001b[31mreceived\u001b[39m\u001b[2m).\u001b[22mtoEqual\u001b[2m(\u001b[22m\u001b[32mexpected\u001b[39m\u001b[2m) // deep equality\u001b[22m\n\n\u001b[32m- Expected  - 3\u001b[39m\n\u001b[31m+ Received  + 1\u001b[39m\n\n\u001b[32m- Array [\u001b[39m\n\u001b[32m-   \"/test/pattern.mp4?quality=A\",\u001b[39m\n\u001b[32m- ]\u001b[39m\n\u001b[31m+ Array []\u001b[39m\n\nCall Log:\n- Timeout 7000ms exceeded while waiting on the predicate\n\n  77 |       calls.push({ started, elapsed: Date.now() - started, ...state })\n  78 |       return state.events\n> 79 |     }).toEqual(['/test/pattern.mp4?quality=A'])\n     |        ^\n  80 |   }\n  81 |   finally {\n  82 |     await testInfo.attach('chapter-restart-observations', { contentType: 'application/json', body: JSON.stringify(calls) })\n    at waitForChapterRestart (D:\\github\\ArtPlayer\\test\\browser\\chapter-combinations.spec.js:79:8)\n    at D:\\github\\ArtPlayer\\test\\browser\\chapter-combinations.spec.js:153:13"
        }
      ],
      "attachments": {
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            "elapsed": 6,
            "at": 3567,
            "timeOrigin": 1789495367589,
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          "timeOrigin": 1789495367589,
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          ],
          "nativeEvents": [
            {
              "name": "loadedmetadata",
              "at": 559,
              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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              "at": 559,
              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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              "readyState": 4
            },
            {
              "name": "canplay",
              "at": 560,
              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "playing",
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              "time": 0.020421,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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              "readyState": 4
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            {
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              "time": 0.2709295,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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            {
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              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
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            {
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              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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            {
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              "time": 3.0075994,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
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            },
            {
              "name": "canplay",
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              "time": 3.0075994,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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            },
            {
              "name": "canplay",
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              "time": 3.0075994,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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            },
            {
              "name": "canplay",
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              "time": 3.0075994,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "seeked",
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              "time": 3.0123779,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
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              "readyState": 4
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          ],
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              "start": "0",
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            {
              "start": "2",
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              "duration": "4",
              "title": "Middle"
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            {
              "start": "6",
              "end": "8",
              "duration": "2",
              "title": "Ending"
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          "sha256": "64101d8781a4847786fd5a88a9442b7b837eb6251565b0d6a8a7940c2383feb1"
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        {
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          "path": "refactor/.cache/chapter05-major-quality/results/chapter-combinations-candi-40028-pter-thumbnail-interactions-webkit/error-context.md",
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        {
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          "path": "refactor/.cache/chapter05-major-quality/results/chapter-combinations-candi-40028-pter-thumbnail-interactions-webkit/trace.zip",
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    {
      "title": "candidate core + candidate chapter: quality switch preserves chapter/thumbnail interactions",
      "project": "webkit",
      "status": "passed",
      "retry": 0,
      "durationMs": 14563,
      "errors": [],
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            "started": 1789495377019,
            "elapsed": 27,
            "at": 8785,
            "timeOrigin": 1789495368259,
            "events": [
              "/test/pattern.mp4?quality=A"
            ]
          }
        ],
        "quality-position": {
          "before": 3.0088072,
          "restoredTime": 3.0095816,
          "historicalReset": false
        },
        "chapter-combination-state": {
          "at": 14195,
          "timeOrigin": 1789495368259,
          "qualitySelectedAt": 8162,
          "events": [
            {
              "name": "seek",
              "value": 3.0064516129032257,
              "at": 2465
            },
            {
              "name": "restart",
              "value": "/test/pattern.mp4?quality=A",
              "at": 8683
            }
          ],
          "nativeEvents": [
            {
              "name": "loadedmetadata",
              "at": 535,
              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "loadeddata",
              "at": 535,
              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "canplay",
              "at": 535,
              "time": 0,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "playing",
              "at": 1084,
              "time": 0.0050302,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": false,
              "readyState": 4
            },
            {
              "name": "pause",
              "at": 1799,
              "time": 0.5409037,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "seeking",
              "at": 7469,
              "time": 3.0064516129032257,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 2
            },
            {
              "name": "canplay",
              "at": 7475,
              "time": 3.0064516129032257,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "seeked",
              "at": 7490,
              "time": 3.0088072,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=B",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "loadedmetadata",
              "at": 8682,
              "time": 3.0088072,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "loadeddata",
              "at": 8682,
              "time": 3.0088072,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "canplay",
              "at": 8683,
              "time": 3.0088072,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "seeking",
              "at": 8712,
              "time": 0.0012962,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "seeked",
              "at": 8714,
              "time": 3.0088072,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 4
            },
            {
              "name": "seeking",
              "at": 8744,
              "time": 3.0095816,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 2
            },
            {
              "name": "seeked",
              "at": 8745,
              "time": 3.0095816,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": true,
              "readyState": 2
            },
            {
              "name": "canplay",
              "at": 13750,
              "time": 3.0095816,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": false,
              "readyState": 4
            },
            {
              "name": "playing",
              "at": 13751,
              "time": 3.0095816,
              "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
              "paused": false,
              "readyState": 4
            }
          ],
          "time": 3.4082631,
          "paused": false,
          "mediaError": null,
          "source": "http://127.0.0.1:8084/test/pattern.mp4?quality=A",
          "readyState": 4,
          "mobileBranch": false,
          "maxTouchPoints": 0,
          "chapters": [
            {
              "start": "0",
              "end": "8",
              "duration": "8",
              "title": "Updated after quality"
            }
          ]
        },
        "browser-evidence": {
          "browser": "26.6",
          "platform": "win32",
          "errors": [],
          "consoleErrors": [],
          "failedRequests": []
        }
      },
      "files": []
    }
  ],
  "slowCalls": [
    {
      "member": "2-trace.trace",
      "method": "evaluateExpression",
      "callId": "call@241",
      "durationMs": 9989.900999999998,
      "startTime": 28593.828,
      "endTime": 38583.729,
      "expression": "() => ({\n        at: performance.now(),\n        timeOrigin: performance.timeOrigin,\n        events: window.chapterEvents.filter(event => event.name === 'restart').map(event => event.value)\n      })",
      "result": {
        "value": {
          "o": [
            {
              "k": "at",
              "v": {
                "n": 13643
              }
            },
            {
              "k": "timeOrigin",
              "v": {
                "n": 1789495367589
              }
            },
            {
              "k": "events",
              "v": {
                "a": [
                  {
                    "s": "/test/pattern.mp4?quality=A"
                  }
                ],
                "id": 2
              }
            }
          ],
          "id": 1
        }
      }
    }
  ],
  "observation": {
    "restartAtMs": 3601,
    "qualitySelectedAtMs": 2982,
    "restartDelayMs": 619,
    "pollTimeoutMs": 7000,
    "slowEvaluationMs": 9989.900999999998,
    "timeAfterFailure": 3.0123779,
    "mediaErrorAfterFailure": null
  },
  "conclusion": "The current-major failure is reproduced. The restart event was recorded before the deadline; a subsequent browser evaluation returned the expected event after approximately 10 seconds. This does not establish whether the underlying stall belongs to media, rendering, OS scheduling or browser automation.",
  "limitations": [
    "No production or test behavior changed; no timeout increase or retry.",
    "Existing published-core WebKit position-reset observations are retained by the original test assertions.",
    "The risk remains open; other Chapter combinations and real devices are not accepted by this focused run."
  ]
}