{
  "observedDate": "2026-10-27",
  "method": "InspectMesh local resolver -> serializeThreeMfScope -> exact saved STL reopened by readStl, in Vitest; application-internal derivative verification.",
  "sourceRevision": "359298a76e90f7063d6338cb2cdeb8a6862a2303",
  "implementations": [
    {
      "file": "src/app/features/converters/three-mf-stl-export.ts",
      "sha256": "7bdcf64643c747357479f0524d6be82cdb93bfe417090fea2f75f0a97c5b4c6a"
    },
    {
      "file": "src/app/features/shared/wall-thickness/three-mf-wall-thickness.ts",
      "sha256": "e6f347e34f635e694075da3ad4bddbd632ac3be0bdbaebf3b067bcccb06c8b30"
    },
    {
      "file": "src/app/features/stl-reducer/stl-reducer.ts",
      "sha256": "566ff7b88bf0501d48bff54934d9d4a0fa6ee8002612a2277c0c6f5ed055acc7"
    }
  ],
  "reproduction": "INSPECTMESH_REFRESH_EVIDENCE=1 npx vitest run scripts/file-handoff.spec.mts",
  "externalReceiver": "untested",
  "appearance": "untested",
  "printerProfile": "untested",
  "observation": {
    "source": {
      "name": "two-placed-cubes.3mf",
      "sha256": "9f34181aa4a38067dd689f6815ba7406f658435bc00ef35d93b5ec208709a382",
      "bytes": 979
    },
    "outputs": [
      {
        "name": "entire-build.stl",
        "sha256": "81d01466616c42b747f7a286e5c59857e4d24b9f095885bb7892bd1390cf57e2",
        "bytes": 1284,
        "report": {
          "methodVersion": "inspectmesh-3mf-export-1 / core-geometry-1 (3MF Core 1.4.0)",
          "source": {
            "name": "two-placed-cubes.3mf",
            "bytes": 979,
            "declaredUnit": "millimeter",
            "displayedUnit": "millimetres",
            "modelPart": "3D/3dmodel.model"
          },
          "resolutionStatus": "Complete supported geometry",
          "limitations": [
            "Optional colours, materials, metadata and project settings are outside this geometry check. Keep the original 3MF.",
            "Bounds and triangle checks do not establish topology, solid unions or printability."
          ],
          "scope": "Entire supported placed build",
          "placedItems": [
            {
              "id": "build-1",
              "resourceId": "1",
              "originalPlacement": [
                1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1
              ]
            },
            {
              "id": "build-2",
              "resourceId": "1",
              "originalPlacement": [
                1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 40, 0, 0, 1
              ]
            }
          ],
          "coordinatePolicy": "Preserve resolved placement",
          "translationMm": [0, 0, 0],
          "expectedBoundsMm": {
            "min": [0, 0, 0],
            "max": [60, 20, 20],
            "spans": [60, 20, 20]
          },
          "exportedBoundsMm": {
            "min": [0, 0, 0],
            "max": [60, 20, 20],
            "spans": [60, 20, 20]
          },
          "reopenedBoundsMm": {
            "min": [0, 0, 0],
            "max": [60, 20, 20],
            "spans": [60, 20, 20]
          },
          "expectedTriangles": 24,
          "reopenedTriangles": 24,
          "verification": {
            "passed": true,
            "method": "Reopen exact serialized bytes with the repository STL parser; compare every oriented triangle after Float32 rounding, allowing cyclic vertex order. Count and bounds are also reported. Tolerance describes Float32 rounding, not a surface or printability guarantee.",
            "toleranceMm": 0.0000019073486328125,
            "maximumFloat32ErrorMm": 0,
            "sourceFloat32ErrorMm": 0
          },
          "nextAction": "Retain the original 3MF. Reopen the downloaded STL in the destination application, select millimetres and check a known dimension and placement. STL has no unit declaration."
        }
      },
      {
        "name": "second-placement.stl",
        "sha256": "a943c1f9e248813f21b3266235eb3f47af22173f78fae04b9aeefa8aa692a7d8",
        "bytes": 684,
        "report": {
          "methodVersion": "inspectmesh-3mf-export-1 / core-geometry-1 (3MF Core 1.4.0)",
          "source": {
            "name": "two-placed-cubes.3mf",
            "bytes": 979,
            "declaredUnit": "millimeter",
            "displayedUnit": "millimetres",
            "modelPart": "3D/3dmodel.model"
          },
          "resolutionStatus": "Complete supported geometry",
          "limitations": [
            "Optional colours, materials, metadata and project settings are outside this geometry check. Keep the original 3MF.",
            "Bounds and triangle checks do not establish topology, solid unions or printability."
          ],
          "scope": "One top-level placed item: build-2",
          "placedItems": [
            {
              "id": "build-2",
              "resourceId": "1",
              "originalPlacement": [
                1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 40, 0, 0, 1
              ]
            }
          ],
          "coordinatePolicy": "Preserve resolved placement",
          "translationMm": [0, 0, 0],
          "expectedBoundsMm": {
            "min": [40, 0, 0],
            "max": [60, 20, 20],
            "spans": [20, 20, 20]
          },
          "exportedBoundsMm": {
            "min": [40, 0, 0],
            "max": [60, 20, 20],
            "spans": [20, 20, 20]
          },
          "reopenedBoundsMm": {
            "min": [40, 0, 0],
            "max": [60, 20, 20],
            "spans": [20, 20, 20]
          },
          "expectedTriangles": 12,
          "reopenedTriangles": 12,
          "verification": {
            "passed": true,
            "method": "Reopen exact serialized bytes with the repository STL parser; compare every oriented triangle after Float32 rounding, allowing cyclic vertex order. Count and bounds are also reported. Tolerance describes Float32 rounding, not a surface or printability guarantee.",
            "toleranceMm": 0.0000019073486328125,
            "maximumFloat32ErrorMm": 0,
            "sourceFloat32ErrorMm": 0
          },
          "nextAction": "Retain the original 3MF. Reopen the downloaded STL in the destination application, select millimetres and check a known dimension and placement. STL has no unit declaration."
        }
      }
    ]
  },
  "rights": "Original InspectMesh controls; CC0-1.0; no physical validation."
}