MainWindow drops the standard Windows title bar (WindowStyle=None + WindowChrome with CaptionHeight=44, ResizeBorderThickness=6, UseAeroCaptionButtons=False) and draws its own minimize / maximize-restore / close buttons inline in the existing header strip. The custom buttons opt into shell:WindowChrome.IsHitTestVisibleInChrome=True so clicks fire on them rather than starting a window drag.
Result: the entire top of the window is now ours, matching the Microsoft Teams desktop client's flush header look. The 'TeamsISO + by Wild Dragon' branding sits at the same baseline as the engine-status pill and the caption controls, and dragging anywhere not occupied by an interactive widget moves the window.
Caption-button styles in the theme: 46x32 hover-tinted, with the close button turning the Windows 11 #C42B1C red on hover. Maximize-button glyph swaps between the single-rectangle and overlapping-rectangles variants on StateChanged.
Drive-by: ParticipantViewModel.{FramesIn,FramesOut,IncomingResolution} setters dropped from private to public so {Run Text=...} bindings (which default to TwoWay on Run) can attach without WPF throwing 'cannot work on read-only property'.
IsoPipeline now publishes refs to its currently-live NdiReceiver and NdiSender (set by RunInnerPipelineAsync, cleared on exit) so a stats poll from any thread can read FramesCaptured / FramesSent without entangling the pipeline's lifetime with its observer. The receiver's raw-frame channel is wrapped with a TappedChannelWriter so the most recent RawFrame is captured for source-resolution display, again without changing the receiver's contract.
IsoController.GetStats() drops the stub return-Empty and instead reads the live pipeline.GetStats() outside the gate so a slow stats read can't serialize the controller's other operations.
WPF: MainViewModel runs a 1 Hz DispatcherTimer that pulls stats for every participant view-model and pushes them via UpdateStats(). ParticipantViewModel grows three displayable properties — FramesIn, FramesOut, IncomingResolution — bound into the participants DataGrid as a new 'Live' column showing the down/up frame counts and the source resolution underneath the machine name.
Tests: 74/74 unit + 9/9 NDI integration green; the existing round-trip integration test exercises the new wiring at runtime (live receiver/sender refs are set, frames flow, channels close cleanly).
Adds Serilog.Sinks.File to TeamsISO.Engine and a new EngineLogging.CreateDefault() factory that writes to BOTH the existing console sink and a rolling daily file at %LOCALAPPDATA%\\TeamsISO\\Logs\\teamsiso<date>.log. The WPF host (TeamsISO.exe is a WinExe with no console attached at runtime) now uses CreateDefault so support has something to ask for when users file an issue. The Console build keeps using CreateConsole — stdout is the right surface there and shell redirection beats a competing on-disk sink.
Files roll daily, cap at 10 MB before mid-day rollover, and only the most recent 14 are retained. Disk flush interval is 250 ms so a tail -f from another tool sees lines promptly. Path is announced via the first log line on every startup.
Two unit tests gate the wiring: AllLoggers_WriteToFile (verifies both typed and named CreateLogger() reach the file) and LogsAtBelowMinimumLevel_AreSuppressed (regression guard for level filtering). 74/74 unit tests pass (was 72).
Also adds a startup breadcrumb log line in App.OnStartup carrying the build version + PID so we can correlate a user's log file with a specific commit.
Synthesizes a 640x360 cyan BGRA source named like a Teams participant, runs the production IsoPipeline against it (NdiReceiver -> FrameProcessor -> ManagedNearestNeighborFrameScaler -> NdiSender, all backed by NdiInteropPInvoke), connects a receiver to the resulting TEAMSISO_* output, and asserts that captured frames come back at the configured 1920x1080 target. Closes the loop on the receive/scale/emit chain that was previously only unit-tested in isolation against fakes.
If this test ever goes red we have a regression in something that actually matters: the runtime resolver, the parser-free pipeline construction path, the frame channel back-pressure, the scaler's pillarbox math, the sender clock, or the receiver-from-loopback path. Pinned at requires=ndi so default CI skips it; runs locally in ~780ms.
Replaces the previously-skipped placeholder with 8 integration tests that exercise the production P/Invoke shim against the installed NDI 6 runtime: runtime version probe + prefix assertion (catches future SDK rebrandings), finder lifecycle on default + custom groups (incl. whitespace tolerance + multi-group), sender lifecycle on default + custom groups, and a loopback-discovery test that creates a uniquely-named sender and asserts a same-process finder sees it within 5 s.
All marked [Trait('requires', 'ndi')] so the existing CI filter (Category!=ndi&requires!=ndi) excludes them. Run locally with: dotnet test --filter requires=ndi. Today: 8/8 pass against NDI 6.2 on Windows 11.
Replaces the Stone theme with Wild Dragon branding (canvas #0A0A0A, accent cyan #97EDF0, secondary #9AE0FD, coral alert #FB819C — sourced from wilddragon.net) and reorganizes MainWindow into a Microsoft Teams-style three-column layout: a 72px left rail (logo + Participants/Settings nav + engine-status indicator), a center content area (header + participants card), and a right settings panel.
Adds InitialsConverter so participant avatars render real initials (Brendon Power -> 'BP', '(Local)' -> 'L') instead of a generic glyph. Drops the obsolete StoneTheme.xaml; the project now ships exactly one theme dictionary.
Typography: Inter (with Segoe UI Variable Display fallback) for the sans stack, JetBrains Mono (Cascadia Mono fallback) for machine names and timecodes — matching the wilddragon.net site.
Verified live against the running Teams meeting: app launches, participant 'Brendon Power' displays with avatar, settings panel surfaces NDI groups + Hide-Local toggle, engine status pill shows green/live.
Two simultaneous TeamsISO processes contend over the NDI runtime, the same default sender names, and %APPDATA%\\TeamsISO\\config.json — observed during testing when launchers / shortcuts produced duplicate windows. Add a Local namespace per-user-keyed mutex (Local\\WildDragon.TeamsISO.SingleInstance.<username>) at startup; if a second instance can't claim it, broadcast a registered window message ('WildDragon.TeamsISO.BringToFront') and Shutdown(0). The running instance subscribes to that message via ComponentDispatcher.ThreadFilterMessage and surfaces its main window when received.
Per-user keying lets two different Windows users on the same machine each run their own TeamsISO. Mutex is released and disposed on OnExit.
Verified: Start-Process the exe twice in a row -> only one process remains, with the original window surfaced.
Adopts the design language from Dammyjay93/interface-design: warm Stone neutrals, accent orange (#EA580C), borders-only depth (no shadows), 8px spacing grid, all-caps section labels, mono typography for machine names and timecodes.
Themes/StoneTheme.xaml is the single source of truth for design tokens (color brushes, typography styles, spacing) plus restyled control templates (Button, TextBox, ComboBox, ComboBoxItem, CheckBox, DataGrid + DataGridColumnHeader / DataGridRow / DataGridCell, ScrollBar). MainWindow consumes the tokens and is laid out with a header (title + status pill), section-headed Settings sidebar (Output Format / NDI Network / Display), card-wrapped participant list, and a mono status footer.
Settings sidebar surfaces the new NDI group configuration (discovery + output) and a Hide-(Local) checkbox. The latter filters the user's own self-preview from the participants list at the MainViewModel layer (HideLocalSelf=true by default) so operators don't accidentally route their own preview as an ISO. Apply Changes round-trips both FrameProcessingSettings and NdiGroupSettings through the controller in one go.
Adds an NdiGroupSettings record carrying optional comma-separated NDI group lists for the finder and the senders. Extends INdiInterop.CreateFinder / CreateSender with optional groups arguments and populates NDIlib_find_create_t.p_groups and NDIlib_send_create_t.p_groups via P/Invoke. IsoController reads the settings on construction, threads DiscoveryGroups into NdiDiscoveryService and OutputGroups into IsoPipelineConfig, and exposes SetGroupSettingsAsync for runtime updates (group changes apply on next process restart so live pipelines aren't orphaned).
This unblocks the 'transcoder' topology where Teams broadcasts NDI on a private group (e.g. teamsiso-input) and TeamsISO re-emits clean normalized streams on Public — keeping raw, wrong-framerate Teams sources off the production network.
EngineConfig schema is JSON-back-compat: existing config.json files (no NdiGroups field) deserialize with NdiGroups=null and load as NdiGroupSettings.Default. UI surface for these settings comes in a follow-up.
Tests: 72/72 passing (was 69) — added IsoController coverage that group settings are read from ConfigStore on startup, passed to the finder, threaded into per-pipeline config, and round-trip through SetGroupSettingsAsync/Save/Load.
Enumerates every raw NDI source string visible to the local NDI finder for ~5 seconds and prints unique ones, then exits. Bypasses NdiSourceParser so it surfaces sources that the parser would otherwise reject — useful for confirming the on-the-wire format Teams (or any other producer) is actually emitting on a given setup.
Used directly to diagnose the Teams 'MS Teams' vs. 'Teams' brand-prefix mismatch fixed in the previous commit; left in as a permanent debug tool for future setup issues.
The new Microsoft Teams desktop client (observed against a live meeting on Teams 26106.1906.4665.7308) emits NDI source strings of the form
WOOGLIN (MS Teams - Brendon Power)
WOOGLIN (MS Teams - (Local))
WOOGLIN (MS Teams - Active Speaker)
rather than the legacy 'MACHINE (Teams - ...)' shape NdiSourceParser was written to. As a result every Teams source was rejected and TeamsISO showed zero participants in real meetings.
Refactor the parser to recognize 'Teams', 'MS Teams', and (defensively) 'Microsoft Teams' as brand prefixes — longest first so 'MS Teams' isn't shadowed. Also recognize reserved suffix tokens after a dash ('Active Speaker' / 'Audio' / 'Audio Mix' / 'Screen Share') so the new active-speaker output is correctly classified as ActiveSpeaker rather than misread as a participant named 'Active Speaker'.
Tests: kept all legacy cases, added MS Teams + Microsoft Teams variants and the new dash-prefixed reserved-suffix cases. 69/69 unit tests passing; verified end-to-end against a live Teams meeting where TeamsISO.exe now shows '(Local)' and 'Brendon Power' in the Participants DataGrid.
Shipping NDI 6 reports its version as a build banner of the form
NDI SDK WIN64 13:07:00 Jun 2 2025 6.2.0.3
not the 'NDI SDK for Windows v6.x.x.x' format the prefix constant assumed. As a result NdiRuntimeProbe raised a spurious mismatch alert on every supported install. Update ExpectedRuntimeVersionPrefix to 'NDI SDK WIN64' which is the stable architecture token in the new banner; the trailing four-part version remains available for a stricter major-version check if that becomes useful.
The NDI 6 installer sets NDI_RUNTIME_DIR_V6 (and V5/V4 for back-compat) but does not always add the runtime directory to PATH, so a default DllImport(Processing.NDI.Lib.x64) failed with 0x8007007E (DllNotFoundException) on otherwise correctly installed machines, killing both TeamsISO.exe and TeamsISO.Console at preflight.
Add NdiNativeLibraryResolver, registered from NdiNative's static ctor, that resolves the DLL by trying NDI_RUNTIME_DIR_V6 / V5 / V4 in order, NativeLibrary.Load-ing the file from disk before the runtime falls back to its default search algorithm. Static-ctor registration (rather than [ModuleInitializer]) sidesteps CA2255 under TreatWarningsAsErrors and still guarantees the resolver is in place before the first P/Invoke fires.
- TeamsISO.App: hand-rolled net8.0-windows WPF csproj since the WPF
template isn't shipped on linux-arm64 .NET SDK; UI is a placeholder
for Phase C.
- TeamsISO.Engine.IntegrationTests: cross-platform xunit project with a
skipped scaffold fact tagged [Trait("requires", "ndi")] for Phase B.
- TeamsISO.Linux.slnf: solution filter for non-Windows CI that excludes
the WPF project (which can only build on Windows).
