{
  "schema_version": "1.0",
  "checker_version": "0.4.0",
  "verdict": "ACCEPT_FOR_USE",
  "complete": true,
  "intended_use": "Selected USD metadata, material-delivery and four-second stage-duration checks; excludes full shader compliance and physical certification",
  "contract_id": "astra-mechanism-delivery-demo",
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    "checker_sha256": "55086460b6669852b0b4d0fb8e473d1378dc5fc64f2cc15b3f53aed3346f803c",
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    "candidate": {
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      "files": {
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    "baseline": null,
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        "version": "1.0.0",
        "api_version": "1.0",
        "description": "Named native OpenUSD validators",
        "checks": {
          "validators": {
            "description": "Run explicit native validators",
            "coverage": "Named native validator scope",
            "limitations": [
              "Local USD admission limits apply."
            ],
            "parameters": {
              "type": "object",
              "properties": {
                "validators": {
                  "type": "array",
                  "items": {
                    "type": "string",
                    "minLength": 1
                  },
                  "minItems": 1,
                  "maxItems": 128,
                  "uniqueItems": true
                },
                "warnings_as_failures": {
                  "type": "boolean"
                }
              },
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                "warnings_as_failures"
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              "additionalProperties": false
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        "source_sha256": {
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        "dependencies": {
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        },
        "implementation_sha256": "7152da7482bbda19e370c9762aa5bd96708885ccf238e2418bf8336c127cf810"
      },
      "materials": {
        "id": "materials",
        "version": "1.0.0",
        "api_version": "1.0",
        "description": "Material structure and delivery requirements",
        "checks": {
          "delivery": {
            "description": "Check resolved bindings, shader IDs and external files",
            "coverage": "Named material structure and dependency existence",
            "limitations": [
              "No rendered appearance, image decoding, UV correctness or physical parameters"
            ],
            "parameters": {
              "type": "object",
              "properties": {
                "bindings": {
                  "type": "object",
                  "minProperties": 1,
                  "maxProperties": 256,
                  "additionalProperties": {
                    "type": "string",
                    "minLength": 1
                  }
                },
                "purpose": {
                  "enum": [
                    "",
                    "allPurpose",
                    "preview",
                    "full"
                  ]
                },
                "render_context": {
                  "type": "string"
                },
                "surface_shader_id": {
                  "type": "string"
                }
              },
              "required": [
                "bindings",
                "purpose",
                "render_context",
                "surface_shader_id"
              ],
              "additionalProperties": false
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        "source_sha256": {
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        "implementation_sha256": "8a68db961a678e01f61a45b15a78f7ecafda25c82e59ac68c7d00d2208af06c3"
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        "description": "Authored clock requirements and world-origin samples in elapsed seconds",
        "checks": {
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            "description": "Check authored stage duration and optionally require an exact clock rate",
            "coverage": "Authored stage time range converted to seconds",
            "limitations": [
              "Does not infer active motion duration; an authored positive clock and complete time range are required"
            ],
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                "duration_s": {
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                  "minimum": 0
                },
                "tolerance_s": {
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                "time_codes_per_second": {
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                  "exclusiveMinimum": 0
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              "required": [
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                "tolerance_s"
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              "additionalProperties": false
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          },
          "positions": {
            "description": "Compare named world origins at elapsed seconds from the authored stage start",
            "coverage": "Named world origins at the requested elapsed seconds",
            "limitations": [
              "No continuous-time, orientation, collision or physics proof",
              "Requires authored clock and time range"
            ],
            "parameters": {
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                },
                "tolerance_m": {
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                  "minimum": 0
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                "samples": {
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                  "maxItems": 1000,
                  "items": {
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                    "properties": {
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                        "minimum": 0
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                      "world_origin_m": {
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                        "items": {
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                "samples"
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      "reason": "Admitted local USD dependencies; missing files remain unresolved.",
      "evidence": {
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        "adapter": "usd-local-v1"
      },
      "required": true,
      "duration_ms": 0
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      "status": "PASS",
      "reason": "Selected native OpenUSD validators executed.",
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        "check": "validators",
        "observations": {
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          "issues": [],
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            25,
            11
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          "coverage": "Provider-specific validation; no fixes applied."
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      },
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      "duration_ms": 32.827
    },
    {
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      "status": "PASS",
      "reason": "Resolved bindings, selected surface shader IDs and declared external file existence checked.",
      "evidence": {
        "pack": "materials",
        "check": "delivery",
        "observations": {
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              "property": "material:binding",
              "expected": "/root/_materials/Structure___cobalt_enamel",
              "observed": "/root/_materials/Structure___cobalt_enamel",
              "relationship": "/root/CRANK_SLIDER_ASSEMBLY/Base___cobalt_plinth/Cube.material:binding",
              "status": "PASS"
            },
            {
              "object": "/root/_materials/Structure___cobalt_enamel",
              "property": "surface_shader_id",
              "expected": "UsdPreviewSurface",
              "observed": "UsdPreviewSurface",
              "status": "PASS"
            },
            {
              "object": "/root/CRANK_SLIDER_ASSEMBLY/Slider_Translation/Orange_slider_carriage/Cube_021",
              "property": "material:binding",
              "expected": "/root/_materials/Slider___signal_orange",
              "observed": "/root/_materials/Slider___signal_orange",
              "relationship": "/root/CRANK_SLIDER_ASSEMBLY/Slider_Translation/Orange_slider_carriage/Cube_021.material:binding",
              "status": "PASS"
            },
            {
              "object": "/root/_materials/Slider___signal_orange",
              "property": "surface_shader_id",
              "expected": "UsdPreviewSurface",
              "observed": "UsdPreviewSurface",
              "status": "PASS"
            },
            {
              "object": "/root/CRANK_SLIDER_ASSEMBLY/Connecting_Rod_Pose/Connecting_rod/Connecting_rod",
              "property": "material:binding",
              "expected": "/root/_materials/Linkage___satin_steel",
              "observed": "/root/_materials/Linkage___satin_steel",
              "relationship": "/root/CRANK_SLIDER_ASSEMBLY/Connecting_Rod_Pose/Connecting_rod/Connecting_rod.material:binding",
              "status": "PASS"
            },
            {
              "object": "/root/_materials/Linkage___satin_steel",
              "property": "surface_shader_id",
              "expected": "UsdPreviewSurface",
              "observed": "UsdPreviewSurface",
              "status": "PASS"
            },
            {
              "object": "/root/CRANK_SLIDER_ASSEMBLY/Rubber_isolator/Cylinder",
              "property": "material:binding",
              "expected": "/root/_materials/Feet___dark_rubber",
              "observed": "/root/_materials/Feet___dark_rubber",
              "relationship": "/root/CRANK_SLIDER_ASSEMBLY/Rubber_isolator/Cylinder.material:binding",
              "status": "PASS"
            },
            {
              "object": "/root/_materials/Feet___dark_rubber",
              "property": "surface_shader_id",
              "expected": "UsdPreviewSurface",
              "observed": "UsdPreviewSurface",
              "status": "PASS"
            },
            {
              "object": "textures/color_455881.hdr",
              "property": "external_asset_exists",
              "expected": true,
              "observed": true,
              "status": "PASS",
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    {
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            "duration_s": 4.0
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              "status": "PASS"
            }
          ],
          "coverage": "Authored stage interval only; not the onset, completion or continuous path of object motion."
        }
      },
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    "profile": {
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        "check": "validators",
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        "parameters": {
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      },
      {
        "id": "materials.delivery",
        "pack": "materials",
        "check": "delivery",
        "required": true,
        "parameters": {
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            "/root/CRANK_SLIDER_ASSEMBLY/Slider_Translation/Orange_slider_carriage/Cube_021": "/root/_materials/Slider___signal_orange",
            "/root/CRANK_SLIDER_ASSEMBLY/Connecting_Rod_Pose/Connecting_rod/Connecting_rod": "/root/_materials/Linkage___satin_steel",
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          "surface_shader_id": "UsdPreviewSurface"
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      },
      {
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        "parameters": {
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        }
      }
    ],
    "by_pack": {
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        "FAIL": 0,
        "UNKNOWN": 0,
        "ERROR": 0,
        "NOT_APPLICABLE": 0
      },
      "materials": {
        "PASS": 1,
        "FAIL": 0,
        "UNKNOWN": 0,
        "ERROR": 0,
        "NOT_APPLICABLE": 0
      },
      "motion.timing": {
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        "FAIL": 0,
        "UNKNOWN": 0,
        "ERROR": 0,
        "NOT_APPLICABLE": 0
      }
    },
    "checked": "Only selected checks, parameters and reported coverage in this exact use profile.",
    "unchecked": [
      "Any requirement absent from the supplied contract",
      "Real-world material or physical accuracy without suitable reference evidence",
      "Security isolation from installed pack code (trusted in-process execution)",
      "Simulator execution, rendered appearance and general free-form claim grounding"
    ]
  },
  "runtime": {
    "evaluated_at_utc": "2026-09-20T22:48:42.925841+00:00",
    "platform": "macOS-26.7-arm64-arm-64bit",
    "python": "3.12.14",
    "usd": [
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    "elapsed_ms": 610.59,
    "execution_mode": "trusted-local-functions",
    "approved_entry_points": []
  }
}