[skill-update] skill(webnn): align to W3C WebNN CRD January 2026#9
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[skill-update] skill(webnn): align to W3C WebNN CRD January 2026#9github-actions[bot] wants to merge 1 commit intomainfrom
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- Replace deviceType (cpu/gpu/npu) with accelerated boolean per spec change #809 - Expand execution context support from DedicatedWorker to all Worker types - Document createConstantTensor(), createContext(GPUDevice) overload, readTensor(tensor, outputData) overload - Add build() single-invocation constraint to reference - Update MLContextOptions: remove deviceType, add accelerated boolean (default true) - Update compatibility.md with migration note for legacy deviceType usage - Update examples.md context creation to use new API shape - Update WebNNContextOptions TypeScript type in template asset - Note operator labels (MLOperatorOptions.label) in reference Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Summary
Updates the
skills/webnnskill to align with the W3C WebNN Candidate Recommendation published 22 January 2026 (updated from the April 2024 snapshot).Material deltas
1.
deviceTyperemoved →accelerated: booleanreplaces itThe spec removed
MLDeviceType(thecpu/gpu/npuenum) in #809 to simplify device selection.MLContextOptionsnow has:powerPreference:"default"|"high-performance"|"low-power"(unchanged)accelerated:boolean, defaulttrue—truelets the browser prefer GPU/NPU guided bypowerPreference;falserequests CPU inferenceAll skill files updated accordingly. A compatibility note in
references/compatibility.mdflags that older Chromium builds useddeviceTypeas a legacy surface.2. Worker context expanded
The
MLinterface is nowExposed=(Window, Worker)— includes DedicatedWorker, SharedWorker, and ServiceWorker, not onlyDedicatedWorkeras previously documented.3. New API surfaces documented in
references/webnn-reference.mdMLContext.createConstantTensor(descriptor, inputData)— creates a pre-initialized constant tensornavigator.ml.createContext(gpuDevice)overload — WebGPU interop pathMLContext.readTensor(tensor, outputData)overload — reads into an existingAllowSharedBufferSourcebufferMLGraphBuilder.build()single-invocation constraintMLOperatorOptions.label) for diagnosable error messagesFiles changed
SKILL.mdreferences/webnn-reference.mdreferences/compatibility.mdreferences/examples.mdpowerPreferencewithoutdeviceTypereferences/troubleshooting.mdcreateContext()and device selection troubleshooting updatedassets/webnn-runtime.template.tsWebNNDeviceType;WebNNContextOptionsusesacceleratedinstead ofdeviceTypeValidations run
Checklist items confirmed: name/directory match, description within limits, SKILL.md under 500 lines, no human docs added, all paths use forward slashes.
Remaining risks
deviceTypetoacceleratedwas published January 2026. Chromium milestone rollout is ongoing; implementers should verify milestone support againstreferences/compatibility.mdbefore shipping.01.txtwas largely CSS/JS with no extractable API content; all API detail sourced from the W3C spec (higher priority per prompt instructions). No conflict to resolve.