accepted

WebGPU Procedural Timelines

This report separates published implementation state from accepted evidence. Every value below comes from the schema-v2 registry, the emitted source manifest, or promoted same-lab artifacts.

Open demo Owning skill Published source manifest Registry JSON Tracked v2 bundle manifest Canonical source

Lab id: webgpu-procedural-timelines
Kind: Canonical Lab
Owning skill: Procedural Motion Systems
Execution: rendering
Three.js: 0.185.1
Source hash: sha256:75dc31ba17b9a98981bc67e8517eaaa97542ffa9d2bbef2e72929db178ebe709
Published bundle hash: sha256:a572da432992270aff4c515983c60bc28f62de97b3ecca78da007d59e1898c49
Build revision: sha256:d929feed6bb69df4ba0bca7a58c723f6c257d003c20d1e9417d25ccb25e4ecf9
Renderer: Not promoted
Backend: Not promoted
Evidence contract: v2
Tracked release bundle: Present

Claim verdicts

canonicalAcceptancePASS

hardwarePerformanceNOT_CLAIMED

Promoted same-lab media

No same-lab evidence image is promoted for this report. The page intentionally shows status and proof requirements instead of substitute art.

Required capability and runtime proof

Capabilities

native-webgpuaccepted

assembled raw-capture-session evidence-manifest validates under current sourceHash with nativeWebGPU===true.

storage-bufferaccepted

storage.*.bin compute storage readbacks written during correctness capture.

computeaccepted

mechanism.compute-storage.png and storage compute-storage-live buffers produced by motion compute plan.

Runtime proof

renderer-initaccepted

capture-session reports initialized===true and active device generation 1.

backend-is-webgpuaccepted

rendererBackendEvidence.isWebGPUBackend===true on correctness capture session.

mechanism-reachableaccepted

mechanism launch/spin/debris/quaternion/compute/interpolation PNGs captured on fixed routes.

aligned-readbackaccepted

normalized/transport padded readbacks present for presentation targets.

compute-storage-readbackaccepted

storage.compute-storage-live.* and storage.debris-mid.* binaries captured.

mrt-readbackaccepted

diagnostic.normal/emissive/velocity and diagnostics.mosaic captured from MRT graph.

current-adapter-gpu-timestampincomplete

timestampQueriesActive remains false for correctness profile; GPU timing is not accepted as performance evidence.

Capture state

Field	Published value
Primary route	`/demos/webgpu-procedural-timelines/`
Cameras	`near, design, far`
Seeds	`0x00000001, 0x9e3779b9`
Modes	`final, velocity, emissive, normal`
Capture time	`Not present in the promoted report data`
Adapter identity	`Not promoted`
Raw readback hashes	`Not promoted`

Fixed routes

Kind	Id	Startup state	Status
scenario	`launch-and-staging`	`{"scenario":"launch-and-staging"}`	accepted
scenario	`spin-docking`	`{"scenario":"spin-docking"}`	accepted
scenario	`debris-release`	`{"scenario":"debris-release"}`	accepted
mechanism	`launch-and-staging`	`{"mechanism":"launch-and-staging"}`	accepted
mechanism	`spin-docking`	`{"mechanism":"spin-docking"}`	accepted
mechanism	`debris-release`	`{"mechanism":"debris-release"}`	accepted
mechanism	`quaternion-and-reparent`	`{"mechanism":"quaternion-and-reparent"}`	accepted
mechanism	`compute-storage`	`{"mechanism":"compute-storage"}`	accepted
mechanism	`interpolation-and-velocity`	`{"mechanism":"interpolation-and-velocity"}`	accepted
tier	`full`	`{"tier":"full"}`	accepted
tier	`balanced`	`{"tier":"balanced"}`	accepted
tier	`test-minimum`	`{"tier":"test-minimum"}`	accepted

Locked tier contracts

full · accepted

{
  "targetClass": "current native-WebGPU adapter",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 2,
      "unit": "ratio",
      "label": "Authored",
      "source": "motion lab tier"
    }
  },
  "mechanismLimits": {
    "instanceCapacity": {
      "value": 4096,
      "unit": "instances",
      "label": "Authored",
      "source": "motion lab tier"
    }
  },
  "resourceLimits": {
    "motionStorageBytes": {
      "value": 851968,
      "unit": "bytes",
      "label": "Derived",
      "source": "4096 * 208"
    }
  },
  "degradationFromPrevious": [],
  "preservedInvariants": [
    "fixed-step semantics",
    "exact terminal lock",
    "previous/current transforms"
  ]
}

balanced · accepted

{
  "targetClass": "current native-WebGPU adapter",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 1.5,
      "unit": "ratio",
      "label": "Authored",
      "source": "motion lab tier"
    }
  },
  "mechanismLimits": {
    "instanceCapacity": {
      "value": 2048,
      "unit": "instances",
      "label": "Authored",
      "source": "motion lab tier"
    }
  },
  "resourceLimits": {
    "motionStorageBytes": {
      "value": 425984,
      "unit": "bytes",
      "label": "Derived",
      "source": "2048 * 208"
    }
  },
  "degradationFromPrevious": [
    "halve recurrent instance capacity",
    "lower DPR cap"
  ],
  "preservedInvariants": [
    "fixed-step semantics",
    "exact terminal lock",
    "previous/current transforms"
  ]
}

test-minimum · accepted

{
  "targetClass": "correctness fixture",
  "frameTargetMs": null,
  "resolutionPolicy": {
    "dprCap": {
      "value": 1,
      "unit": "ratio",
      "label": "Authored",
      "source": "motion lab tier"
    }
  },
  "mechanismLimits": {
    "instanceCapacity": {
      "value": 64,
      "unit": "instances",
      "label": "Authored",
      "source": "motion lab tier"
    }
  },
  "resourceLimits": {
    "motionStorageBytes": {
      "value": 13312,
      "unit": "bytes",
      "label": "Derived",
      "source": "64 * 208"
    }
  },
  "degradationFromPrevious": [
    "reduce recurrent instance capacity to fixture scale",
    "lower DPR cap"
  ],
  "preservedInvariants": [
    "native WebGPU",
    "fixed-step semantics",
    "exact terminal lock",
    "previous/current transforms"
  ]
}

Limitations

1 required runtime-proof record remain incomplete.
No current-hardware performance claim is published without named-adapter timestamp evidence.