# Plan Backlog

## Completed phases

- **Phase A — Engine Foundation** (tag: `phase-a-complete`) — domain model, parsers, participant tracker, frame processor, config persistence, fakes, CI with 80% coverage gate.
- **Phase B-1 — Pipeline Orchestration** (tag: `phase-b-1-complete`) — `NdiReceiver`, `NdiSender`, `ExponentialBackoff`, `NdiRuntimeProbe`, `IsoPipeline` (with restart supervisor), `IsoController` (top-of-engine API). All testable on Linux against `FakeNdiInterop`.

## Next

1. **Phase B-2 — Real NDI Interop & libyuv** (Windows + NDI runtime required) — production P/Invoke implementation of `INdiInterop` in the `TeamsISO.Engine.NdiInterop` assembly. Real `IFrameScaler` against libyuv. NDI runtime version constant. Console smoke runner that exercises real Teams NDI streams. Integration tests against an `NDI Test Pattern` source. After this phase the engine can drive real ISO outputs end-to-end.

2. **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.

Each phase gets its own `YYYY-MM-DD-teamsiso-phase-X-<topic>.md` plan written by `superpowers:writing-plans` once the previous phase is shipped.