Zero-upload, client-side Revit viewer powered by rvt-rs compiled to WebAssembly.

Hosted at https://drunkonjava.github.io/rvt-rs/viewer/.

Install and local build paths are documented in docs/install.md.

• Nothing leaves the browser tab. The dropped .rvt / .rfa / .rte / .rft bytes are parsed in-process. There are no fetch, XMLHttpRequest, WebSocket, EventSource, or sendBeacon imports in the compiled WebAssembly — the CI job .github/workflows/deploy-viewer.yml fails the build if any show up.
• No telemetry. The page CSP blocks connect-src to everything except self, which is only needed for the static WASM bundle, and blob:, which is needed for the local GLB object URL. No analytics, no error reporting, no CDN font loads.
• Browser-tested invariant. CI runs viewer/tests/no-network.spec.ts (runtime traffic) and viewer/tests/wasm-no-network-imports.spec.ts (wasm-objdump import audit): it opens the built viewer, loads a public sample RFA, and fails with request URL plus initiator if any external or post-open network request occurs. See docs/viewer-privacy-posture.md.
• Deterministic builds. Every JS bundle is built from a pinned action SHA; the WASM comes from a pinned wasm-pack release.

# 1. Build the WASM into viewer/pkg/
(cd .. && wasm-pack build --target web --features wasm --no-default-features --out-dir viewer/pkg)

# 2. Install node deps
cd viewer
npm install

# 3. Serve with Vite (localhost:5173)
npm run dev

Drop a Revit file onto the page, or open a redistributable demo from the gallery (staged from docs/viewer-demos.json via npm run stage:demos). Nothing is sent anywhere.

1. Open a file locally (drop / picker / demo gallery).
2. Read File status: Decode confidence, Export confidence, and IFC bar.
3. Inspect decoded entities in the tree or viewport.
4. Export IFC / glTF / plan only after checking the quality label.
5. Download diagnostics for scaffold or partial exports.

Tier1 redistributable demos (architectural-2024, structural-2023, mep-2024) are staged from corpus/tier1/ via npm run stage:demos. They open cleanly but report scaffold ~25% confidence — that is expected. Reliable typed levels/doors/windows from arbitrary projects still depend on Rust decoder / partition-stream work outside this viewer shell.

User drops .rvt
     │
     ▼
main.ts ── postMessage ──▶ worker.ts
                                │
                                ├── init wasm (pkg/rvt.js)
                                ├── openRvtBytesWithDiagnosticsMode()
                                │                         → IfcModel + diagnostics JSON
                                ├── buildSceneGraph()     → SceneNode JSON
                                ├── modelToGlb()          → Uint8Array
                                └── buildSchedule()       → Schedule JSON
                                │
                          postMessage back
                                │
                                ▼
main.ts
  ├── Three.js scene + OrbitControls + GLTFLoader
  ├── scene tree panel
  ├── category toggles
  ├── export-quality label + IFC bar selector
  ├── File status (decode / export confidence)
  ├── element-info panel (raycast picking)
  └── status line

The worker is mandatory (VW1-19) — parsing a 100 MB RFA blocks the main thread for seconds otherwise.

• viewer/pkg/ — generated by wasm-pack (git-ignored)
• viewer/node_modules/ — npm (git-ignored)
• viewer/dist/ — Vite build (git-ignored)

All three are produced by the deploy workflow on every push to main.