internal/

Command enginetest is a minimal engine worker, as the playground's: the engine's browser executor (one Web Worker per container, the SAB bridge) with this module's host modules, wasi:webgpu and wasi-nn (CPU and WebGPU backends).

Command gpuprobe asks a real browser, through Playwright, what WebGPU it offers a page: whether navigator.gpu exists (in a window and in a worker), and the adapter's vendor, architecture and whether it is a fallback (software) adapter.

Command mnistpng extracts one picture of the MNIST test set (IDX files, gzipped, as published by Y. LeCun, C. Cortes and C. Burges; CC BY-SA 3.0) to a 28x28 grayscale PNG and prints its label, so the mnist example classifies a real handwritten digit whose answer is known.

Command onnxvendor copies the ONNX node tests this repository's onnx package can run into onnx/testdata/node: from a checkout of github.com/onnx/onnx (v1.22.0 is the last tag that ships onnx/backend/test/data/node), every test whose model decodes, uses only supported operators and passes onnx.NewSession.

Command webtest runs in a browser Web Worker (as the playground's engine worker does) and checks the WebGPU wasi-nn backend against the ONNX node tests and MNIST-12: for each case it fetches the model and its test data from the page's origin, runs it through webgpu.Backend, compares with the reference (rtol 1e-3, atol 1e-7, the ONNX backend's tolerances) and posts a JSON report: the adapter, and every case's result.

Command witgen writes the core imports of a WIT interface for Go guests (GOOS=wasip1): one //go:wasmimport per function and resource drop, with its Canonical ABI core signature (package wit), and a table from import name to a call taking and returning core values as uint64.