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        "scenes_long/snow.json": "1992e12f8bd8510a6935bd1c397397c37cbdcc5f4263df894b7690d0f0fcaac7",
        "scenes_long/beam.json": "62fc528c33f2b0c6d68f4083d5ea33646920e1dfedf13f3a20b6c8b22baffa12"
      },
      "regression_source_sha256": {
        "python/tests/python/perf/test_device_coloring_bsr_lifetime.py": "2cc38fd770c9edc32bcb3cb19650ddb5444e529f7ba43981b5e75571f06e5022",
        "python/tests/python/newton_official/test_constitutive_diagnostic_lifetime.py": "417ad53268cac172d9366e1db29a1562703bde923a5e6e95967e9802e3e88b02",
        "python/tests/test_mpm_r1_lifecycle_20260906.py": "bad7bc4bf200309422ba1461402cba19bedea33236ac51c1b84f859a675bfdce",
        "python/tests/python/newton_ref/test_newton_ref_mpm_multi_material_per_particle_cuda.py": "1f1c9ed2b4a7477d752ec681fd7cc6982de9081ca4c3fe3326d431ad3ac2f592",
        "python/tests/python/newton_official/test_beam_strain_bindings.py": "45c92f2d792663526c519bcc0612836992b9ec00dbf04b98412c5498cdf7f3e6"
      }
    }
  },
  "unchanged_limits": [
    "PIC-B strict mismatch",
    "Snow repeatability and long-trajectory differences",
    "Two-way candidate not promoted",
    "Full-engine historical failures",
    "Clean-machine packaging not certified"
  ],
  "harness": {
    "run_checks_sha256": "73504b7fd0f829dab5bd562a58a4e229c86cff1a87ec39dc32f37144b39b8644",
    "source": "Existing frozen delivery test suite and stage-integration test_scene_metrics.py; observation hooks only, no state/config/formula intervention.",
    "external_to_selected_snapshot": [
      "python/tests/test_mpm_r1_lifecycle_20260906.py",
      "stage-integration test_scene_metrics.py"
    ]
  },
  "bounded_acceptance": "PASS",
  "full_engine_and_strict_newton_acceptance": "NOT_RETESTED; historical FAIL remains"
}