# Changelog

All notable changes to TeamsISO are documented here. The format follows
[Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and this project
adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

### Added — May 2026 feature batch

#### Engine
- NDI Groups: discovery + sender support so Teams' raw broadcasts can be
  pinned to a private "teamsiso-input" group while TeamsISO's own
  normalized outputs broadcast on Public.
- One-click "Apply transcoder topology" writes `ndi-config.v1.json` so all
  Teams broadcasts go to the private group and TeamsISO re-emits on Public.
- `RawBgraRecorderSink` per-output recorder: `IRecorderSink` interface +
  raw BGRA stream + `manifest.json` + `convert.cmd` script for FFmpeg
  conversion to H.264 MKV.
- Recording markers: `IRecorderSink.AddMarker(label)` fan-out via
  `IIsoController.AddRecordingMarker`. Markers land in `manifest.json`
  under `markers[]` for post-production chaptering.
- Preview thumbnails: `IsoPipeline.LatestProcessedFrame` published via
  `Volatile.Read` so the UI can render 160×90 BGRA thumbnails in the
  participants DataGrid at 1Hz.
- Idempotent `ParticipantTracker.HandleAdded`: re-emitting Added for an
  already-live source refreshes LastSeen instead of duplicating the row.
  Fixes the "click Refresh and rows ghost-duplicate" bug introduced by
  the Refresh-Discovery affordance.
- `IIsoController.RefreshDiscovery()` rebuilds the NDI finder on the next
  poll tick — useful right after applying a new transcoder topology.
- `IIsoController.AddRecordingMarker(label)` fan-out to every active recorder.
- `IIsoController.SetRecording(enabled, dir)` global recording toggle;
  per-participant override via `EnableIsoAsync(...recordOverride...)`.

#### Host (WPF)
- Active Speaker as a synthetic routable participant with deterministic v5
  GUID derived from `auto-mix:<machine>`.
- Auto-disable on departure: when a participant's NDI source disappears,
  optionally tear down their pipeline.
- Operator presets: chromeless `Presets…` dialog with Save / Apply /
  Delete / Duplicate / Export / Import. Persisted at
  `%LOCALAPPDATA%\TeamsISO\presets.json`. Bundle format
  `teamsiso-presets-bundle/v1` for migration between machines.
- Auto-apply last preset on launch (configurable, off by default).
- `--apply-preset NAME` CLI flag for desktop-shortcut workflows.
- `PresetApplier` — single source of truth for "apply preset to live
  participants" used by the dialog, REST surface, and auto-apply path.
- Live preview thumbnails per participant (160×90 BGRA WriteableBitmap).
- Right-click context menu on participant rows: Toggle ISO, Record-this-
  participant, Copy NDI source name.
- Live filter input (substring match on display name).
- "Enable all online" + "Stop all ISOs" + "Refresh" header actions.
- Per-participant recording opt-out checkbox (Rec column).
- Custom NDI output name template with `{name}`/`{guid}`/`{machine}`/
  `{timestamp}` tokens.
- Phase E.1 — Launcher: rail "Launch / Stop Teams" toggle.
- Phase E.2 — Window orchestration: hide / show Teams windows from the rail.
- Phase E.3 — In-call controls (UIA): Mute, Camera, Share, Leave, Raise hand,
  plus PostMessage shortcut forwarding fallback. Candidate names localized
  for English / German / Spanish / French / Portuguese / Japanese.
- Crash diagnostics: AppDomain + Dispatcher + TaskScheduler unhandled
  exception handlers wired to Serilog.Critical + user-facing dialog.
- First-launch onboarding dialog with 5-step setup checklist.
- About dialog gained "Show welcome", "Check for updates", "Export diagnostics"
  buttons.
- Diagnostic bundle export: zips logs + config + presets + version metadata
  into `~/Downloads/teamsiso-diagnostics-<ts>.zip` for bug reports.
- Update check: manual via About + auto-on-launch banner (throttled to 24h,
  opt-out via flag file at `%LOCALAPPDATA%\TeamsISO\no-update-check.flag`).
- Disk space watcher auto-disables recording at <1GB free.
- Settings panel refactored into OUTPUT / NETWORK / DISPLAY tabs.
- Reset-to-defaults button in OUTPUT tab.
- Enriched footer: REC badge, control-surface badge, session timer (HH:MM:SS
  since first ISO went live), dynamic status text ("3/5 ISOs live · 2 recording").
- Window-scoped keyboard shortcuts: F1 (help), Ctrl+M (marker), Ctrl+Shift+S
  (stop all), Ctrl+R (refresh discovery).
- F1 help / cheat-sheet dialog.
- `UIPreferences` static persists `HideLocalSelf`, `AutoDisableOnDeparture`,
  `ParticipantSort` (JoinOrder / Alphabetical / OnlineFirst) across launches
  to `%LOCALAPPDATA%\TeamsISO\ui-prefs.json`.
- Pop-out per-participant preview window (right-click → Open preview…)
  refreshes at ~20Hz and is multi-monitor friendly.
- Configurable participant sort order via the DISPLAY tab dropdown.
- Stop-All confirms before tearing down running pipelines (catches
  mid-show misclicks).
- About dialog gained "Logs / Recordings / Notes" folder shortcut buttons.
- `NotesWindow` inline viewer for today's show-notes file with 2s polling.
- Duplicate-preset action in the Presets dialog with smart `(copy N)`
  name suggestions.
- `--apply-preset NAME` command-line flag for desktop-shortcut workflows.
- New `TeamsISO.App.Tests` net8.0-windows test project. Initial coverage:
  `OperatorPresetStoreTests` (round-trip, name collisions, schema, bundle
  import/export, garbage-file resilience), `OutputNameTemplateTests` (token
  expansion + sanitization), `OscMessageTests` (wire-format parsing of
  int/float/string/T/F type tags). Backed by an `InternalsVisibleTo` grant
  + a test-only `OperatorPresetStore.PathOverride` hook.
- `IsoHealthStats.PeakAudioLevel` field + DataGrid VU-bar UI scaffolding.
  Engine still emits 0.0 (audio capture is a focused follow-up); the bar's
  decay logic is in place so it animates as soon as engine-side audio
  parsing lands.
- `MediaFoundationRecorderSink` scaffold under `#if MF_AVAILABLE` for
  inline H.264 encoding via Vortice.MediaFoundation. ~10× smaller files
  than the raw BGRA recorder. Activation steps documented at
  `docs/REAL-TIME-RECORDING.md`.
- System-tray icon + minimize-to-tray toggle. Adds
  `<UseWindowsForms>true</UseWindowsForms>` for `NotifyIcon`; the
  `TrayIconHost` lives on `App` (process lifetime, not main-window
  lifetime). Right-click menu has Show / Stop all ISOs / Exit.
- Built-in NDI test pattern: `TeamsISO.Console --test-pattern` broadcasts
  a synthetic 1280×720 30fps source named `TEAMSISO_TEST` showing SMPTE
  color bars + a moving sweep band. Verifies NDI runtime, sender
  configuration, and downstream discovery without needing Teams running.
  Backed by `TestPatternGenerator` in the engine + 4 unit tests covering
  buffer size, alpha, color distinctness, and sweep animation.
- Always-toast on participant disconnect, regardless of `AutoDisableOnDeparture`
  setting. Distinguishes "ISO torn down" (auto-disable on) from "ISO still
  running on slate" (auto-disable off) so operators don't miss a silent
  drop mid-show.
- **Restart this ISO** right-click action — disable + brief delay + re-enable
  for one participant only. Useful when a single feed flakes without
  affecting other ISOs.
- **Roll recording** action: rolls every active recording into a new chunk
  (disable + re-enable each pipeline; recorder finalizes its `manifest.json`
  and starts a fresh subdirectory). Surfaced via `MainViewModel.RollRecordingCommand`,
  REST `POST /recording/roll`, and OSC `/teamsiso/recording/roll`. Useful
  for chaptering between show segments.

#### Control surface
- REST API on `127.0.0.1:9755` with endpoints for participant ISO toggle (by
  Id or display name), preset apply, refresh discovery, stop-all, recording
  on/off, marker drop, notes, and Teams in-call commands. Documented at
  `docs/CONTROL-SURFACE.md`.
- WebSocket `/ws` pushes live participant state at 4Hz with snapshot diffing.
- OSC bridge on UDP `127.0.0.1:9000` mirrors the REST vocabulary
  (`/teamsiso/iso "Jane" 1`, `/teamsiso/preset "..."`, etc.).
- Embedded HTML control panel at `GET /ui` — phone-friendly remote with
  live state and one-click action buttons.
- Show notes service: `POST /notes` and `/teamsiso/notes "..."` append
  timestamped lines to `%LOCALAPPDATA%\TeamsISO\Notes\<YYYY-MM-DD>.md`.

#### CI / Release
- Forgejo CI is green; tag-push release workflow builds + tests + publishes
  + builds MSI on a Windows runner and attaches it to the auto-created
  release via the REST API.
- Optional MSI + exe code-signing wired into `release.yml` — gated on
  `SIGN_CERT_PFX_BASE64` + `SIGN_CERT_PASSWORD` Forgejo Secrets.

### Fixed

- `.slnf` path-separator mismatch (forward slashes for cross-platform).
- NDI native DLL resolution via `NativeLibrary` resolver.
- `ExpectedRuntimeVersionPrefix` updated to NDI 6 banner format.
- `NdiSourceParser` accepts current Teams desktop's `MS Teams - <name>`
  brand format.
- ActiveSpeaker source removal no longer poisons the rename-window
  heuristic for a Participant joining the same machine within the window.
- `IsoPipeline.State` access synchronized via `Volatile.Read/Write`.
- REST handlers now correctly marshal `ObservableCollection` reads + writes
  through the UI dispatcher.
- WebSocket upgrade no longer falls into `res.Close()` finally block (was
  killing freshly-upgraded connections).
- `ParticipantViewModel.UpdateThumbnail` defends against malformed frames
  (`width*height*4 > Pixels.Length`).
- `HasThumbnail` correctly fires `PropertyChanged` when `Thumbnail`
  transitions from null.

[Unreleased]: https://forge.wilddragon.net/zgaetano/teamsiso/compare/v0.1.0...HEAD