# Web FreeCAD BitBybit

FreeCAD-aligned web CAD frontend baseline for the BitBybit runtime boundary.

## Current scope

- React + Vite frontend shell
- Three.js `0.185.1` is pinned for the internal Viewport Adapter; React does not import Three.js directly.
- FreeCAD-style application menus, workbench navigation, Combo View, Task Dock, viewport and Report view
- Machine-readable workbench and command manifest in `src/freecadManifest.ts`
- Chinese implementation plan in `docs/web-cad-implementation-plan.zh-CN.md`

The current milestone is a facade-first integration slice. Part Design document transactions and history are executable in the mock domain adapter; the internal SQLite WASM + OPFS Persistence Worker, schema and in-memory fallback are bundled behind `facade.project`. FreeCAD/OCCT geometry, solver behavior, FCStd interoperability and full workbench semantics remain staged behind the documented P3-P7 gates.

## Development

```bash
npm install
npm run dev
```

Node.js 22 or newer is the supported development baseline, matching the SQLite WASM package engine requirement.

Build verification:

```bash
npm run build
```

The SQLite OPFS worker requires cross-origin isolation headers. Vite dev and preview apply `Cross-Origin-Opener-Policy: same-origin` and `Cross-Origin-Embedder-Policy: require-corp`; deployments must preserve them.