The production (rolldown) build resolves onnxruntime-web to the plain wasm
backend and fetched /vad/ort-wasm-simd-threaded.mjs, which we did not ship —
we only copied the JSEP variant that the Vite dev build uses. That 404'd into
the SPA fallback, reproducing "no available backend found / Failed to fetch
dynamically imported module" in production.
Copy BOTH the JSEP and the plain ort-wasm-simd-threaded.{mjs,wasm} into
public/vad/, so the runtime fetch finds a real file regardless of which build
the bundler picked.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Streaming dictation failed at runtime with "no available backend found /
'text/html' is not a valid JavaScript MIME type": @ricky0123/vad-web 0.0.30
defaults baseAssetPath/onnxWASMBasePath to "./" (relative to the page URL),
so the worklet, Silero model and ORT wasm/mjs were requested against the SPA
catch-all and came back as index.html.
Serve them from a fixed /vad/ instead:
- scripts/copy-vad-assets.mjs copies the 4 runtime assets (vad worklet,
silero_vad_v5.onnx, ort-wasm-simd-threaded.jsep.{mjs,wasm}) from node_modules
into apps/client/public/vad/ (gitignored — the ORT wasm is ~26 MB)
- client dev/build scripts run the copy first so the assets are always present
- useStreamingDictation points both path constants at "/vad/"
Verified: dev server serves all four under /vad/ with HTTP 200 and correct
Content-Type (js/wasm, never text/html); tsc clean. Prod (Docker) build runs
the copy step, so dist/vad/* ships in the image.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
