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      "deviceLabel": "",
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    "mechanismCorrectness": "PASS",
    "performanceCompliance": "NOT_CLAIMED",
    "gpuAttribution": "NOT_CLAIMED",
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    "visualError": "PASS"
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    "Evidence pixels are native-WebGPU readbacks from threejs-ambient-contact-shading/examples/integration-image-pipeline-ao/index.html (the live demo), not substitute gallery art.",
    "Tracked v2 release bundle: docs/visual-validation/integration-image-pipeline-ao/bundle.",
    "hardwarePerformance remains NOT_CLAIMED without named-adapter GPU timestamps."
  ]
}