# Plan Backlog

## Completed phases

- **Phase A — Engine Foundation** (tag: `phase-a-complete`) — domain model, parsers, participant tracker, frame processor, config, fakes, CI gate.
- **Phase B-1 — Pipeline Orchestration** (tag: `phase-b-1-complete`) — NdiReceiver, NdiSender, ExponentialBackoff, NdiRuntimeProbe, IsoPipeline supervisor, IsoController.
- **Phase B-2 — Real NDI Interop** (tag: `phase-b-2-complete`) — `NdiInteropPInvoke` against NDI 6 SDK, managed BGRA scaler, `TeamsISO.Console` headless smoke runner, `NdiVersion` constants.
- **Phase C — WPF UI** (tag: `phase-c-complete`) — MVVM helpers, ParticipantViewModel, GlobalSettingsViewModel, AlertBannerViewModel, MainViewModel, MainWindow XAML with participants DataGrid + settings sidebar + alert banner, App.xaml DI bootstrap.

## Next (Windows-only)

1. **First end-to-end validation on Windows** — install NDI Runtime, clone the repo, build the full solution, run the integration tests against an NDI Test Pattern source, run the WPF app and validate against a real Teams meeting. Fix any issues found.

2. **Phase D — WiX Installer & Release** (Windows) — WiX v5 MSI installer detecting NDI Runtime, release pipeline triggering on tag push, code-signing decision implemented.

3. **Optional polish before v1.0** — system health indicators (CPU/GPU/network meters), per-stream framerate display, output thumbnail previews (deferred from v1.5 if useful), MaterialDesignThemes UI polish.