- **Phase B-2 — Real NDI Interop** (tag: `phase-b-2-complete`) — production `NdiInteropPInvoke` against NDI 6 SDK, managed BGRA scaler with aspect modes, `TeamsISO.Console` headless smoke runner, `NdiVersion` constants. **Compiles on Linux; runs only on Windows with the NDI Runtime installed.**
1.**Phase C — UI & Packaging** (Windows) — WPF MVVM app on top of `IIsoController`. Participant list (DataGrid bound to `Participants` observable), global settings view (framerate, resolution, aspect, audio mode), engine alert banner, system health indicators. WiX MSI installer, release pipeline on tag, About dialog.
2.**First Windows validation** — once on a Windows machine: install NDI Runtime, run `dotnet build`, run `dotnet test --filter "requires=ndi"` against an NDI Test Pattern source, run `TeamsISO.Console --enable-all` against a real Teams meeting.