docs(audit): full Zune 4.8 parity audit against decompiled binaries (shell, ZMDB API, 241 UIX docs, setup payload)

- Decompile ZuneDBApi_Dll (1030 files) and re-extract 1857 ZuneShellResources (241 UIX)
- Unpack ZuneSetupPkg.exe offline setup (x86/x64 MSIs + firmware update svc)
- docs/parity/zune48_parity_audit.md: 13-domain parity matrix, status + evidence
- Track decompiled trees (zuneshell/zunedbapi/zuneshell_resources/uix); ignore raw installers

.gitignore

@@ -32,4 +32,13 @@ bld/
 notzune.db
 
 # Disassembly temporary downloads and unpack caches
-tools/
+tools/*
+!tools/disassembly
+tools/disassembly/*
+!tools/disassembly/zuneshell
+!tools/disassembly/zunedbapi
+!tools/disassembly/zuneshell_resources
+!tools/disassembly/uix
+
+# Local Zune installer packages (kept out of VCS; decompiled trees above are tracked)
+review/

docs/parity/zune48_parity_audit.md

@@ -0,0 +1,262 @@
+# Not-Zune ↔ Microsoft Zune 4.8 Parity Audit
+
+**Audit date:** 2026-09-09
+**Method:** Systematic comparison of the decompiled Microsoft Zune Desktop 4.8 component stack against the current Not-Zune implementation.
+
+---
+
+## 1. Evidence Base (Decompilation Corpus)
+
+| Artifact | Source | Decompile/Extract | Size |
+|---|---|---|---|
+| `ZuneShell_Dll` (managed) | `Zune-x86.msi` | ilspycmd → `tools/disassembly/zuneshell/` | 821 C# files (`ZuneUI/` = 685) |
+| `ZuneDBApi_Dll` (managed) | `Zune-x86.msi` | ilspycmd → `tools/disassembly/zunedbapi/` | 1,030 C# files (19 namespaces) |
+| `ZuneShellResources_Dll` RCDATA | `Zune-x86.msi` | 7z PE extraction → `tools/disassembly/zuneshell_resources/` | 1,857 resources (241 `.UIX` documents, 1,289 PNG, 44 JPG, 4 WAV) |
+| `zune-x64.msi` | `ZuneSetupPkg.exe` | inventoried → `tools/disassembly/setup_pkg/x64/` | x64 player payload (same managed code as x86) |
+| `zunewmdu-x86/x64.msi` | `ZuneSetupPkg.exe` | 7z → `tools/disassembly/wmdu/` | `ZuneWmduDLL` (native firmware-update service) |
+| Native component stack | `Zune-x86.msi` | inventoried → `tools/disassembly/msi/` | UIX engine ×5, ZMDB engine ×4, codecs, MTPZ, bus driver, services |
+
+Both `review/ZunePackage.exe` and `review/ZuneSetupPkg.exe` verified: `ZunePackage.exe` sha256 `ef5e5deb…` identical to the previously disassembled copy (no rework required). `ZuneSetupPkg.exe` is the offline multi-language setup bootstrapper containing the x86/x64 MSI set.
+
+### Zune 4.8 native component map (from MSI payload)
+
+- **Iris UIX engine:** `UIX_Dll`, `UIXcontrols_Dll`, `UIXrender_Dll`, `UIX_renderapi_Dll`, `UIXsup_Dll` (native Direct3D declarative renderer)
+- **Database (ZMDB):** `ZuneDB_dll`, `ZuneDBApi_Dll` (managed API), engine variants `ZuneZMDBClassicDLL`, `ZuneZMDBLibraryDLL`, `ZuneZMDBMobileDLL`, `ZuneZMDBZuneHDDLL`
+- **Audio:** `ZuneSE_dll`, `ZuneAACDec_Dll`, `ZuneSrcWrpDLL`, `ZuneEncEngDLL` + `ZuneEncEXE` (MP3/WMA/AAC encoders), `l3codecp.acm`
+- **Video:** `ZuneH264Dec_Dll`, `ZUNEMp4Dec_Dll`, `ZuneDXVA2_Dll`, `ZuneEvr_Dll`
+- **Device/USB:** `ZuneMTPZ_dll` (MTPZ), `Zumbus.sys` + INF (kernel bus driver), `ZuneBusEnumSvc`, `ZuneDriver_dll`, `ZuneUsbTransport_dll`, `ZuneIpTransport_dll`, `ZuneTcp2Udp_dll`, `WMZUNE*` (USB-PPP)
+- **Services:** `ZuneService_Dll`, `ZuneNssExe`/`ZuneShareEXE` (network sharing), `ZuneWlanCfgSvc`, `ZuneNetProxy_dll`, `ZuneCfg_Dll`, `ZuneConfigEXE`
+- **Shell integration:** `ZuneShellExt_Dll`, `ZuneTaskbar_Dll`, `ZuneLauncherEXE`
+- **Marketplace/DRM:** `ZuneMarketplaceResources_Dll`, PPCRL/MSIDCRL (Passport auth), `ContentDirectoryXML`, `MediaReceiverRegistrarXML` (UPnP/WMC)
+
+---
+
+## 2. Executive Summary
+
+Not-Zune is a **faithful UI shell** with a **growing feature set** built on clean architecture, but it has **one critical structural gap: there is no real audio playback engine** — `AudioEngine` (`src/NotZune.Infrastructure.Audio/AudioEngine.cs`) is a position-ticker simulation and no audio library (NAudio/ManagedBass) is referenced anywhere. Every audible experience (music, crossfade, ReplayGain, volume, the visualizer, podcast streams) is currently simulated; the only real audio output is `SoundEffectService` playing authentic Zune WAV chimes through OS CLI players.
+
+| Domain | Parity | Verdict |
+|---|---|---|
+| A. Shell & Navigation | **HIGH (~85%)** | Authentic chrome, pivots, transport, shortcuts |
+| B. Quickplay | **MEDIUM (~65%)** | Decks + Smart DJ substitute; no hub artwork maps |
+| C. Collection (music) | **HIGH (~80%)** | Full browsing/editing; Find-Album-Info is art-only |
+| D. Now Playing | **HIGH (~75%)** | Ken-Burns + real metadata; no video clips |
+| E. Mixview | **MEDIUM (~60%)** | Constellation + MixStack; similarity is local-only |
+| F. **Audio engine** | **SIMULATED (0%)** | **No sound; all DSP is fake** |
+| G. CD Land | **SIMULATED (~40%)** | Full UI, simulated rip/burn (no drive available) |
+| H. Device sync & lifecycle | **SIMULATED (~35%)** | Gas gauge UI real; sync/firmware simulated |
+| I. Podcasts | **PARTIAL (~50%)** | RSS subscribe; no marketplace; playback simulated |
+| J. Social / Marketplace / Account | **N-A (substitute ~70%)** | Zune Card local substitute; servers dead |
+| K. Settings & Management | **HIGH (~75%)** | Two-tier pivots + persistence (Phase 4) |
+| L. First-launch & onboarding | **MISSING (0%)** | No wizard |
+| M. Platform services (ZMDB, sharing) | **PARTIAL (~40%)** | SQLite substitute; no UPnP/share/MUI |
+
+**Weighted overall parity: ≈ 55–60%** (weighting UI presentation strongly, hardware-dependent features neutrally).
+
+**Top 3 actions for Phase 5:**
+1. **Real audio playback engine** — integrate a cross-platform .NET 8 audio library (NAudio WASAPI/ALSA or ManagedBass); this unblocks crossfade, ReplayGain, volume, gapless, FFT visualizer, and podcast playback. *Everything else in the audio domain is blocked on this.*
+2. **First-launch onboarding wizard** (welcome → monitored folders → privacy → done; mirrors `FirstLaunchLand` flow).
+3. **Find Album Info track matching** — extend the Phase 4 art lookup to the per-track metadata review dialog Zune used (`FINDALBUMINFOSONGMATCH.UIX`).
+
+---
+
+## 3. Parity Matrix
+
+Statuses: **FULL** (implemented, real) · **PARTIAL** (subset) · **SIMULATED** (UI real, behavior fake) · **MISSING** (absent) · **N-A** (Zune server/hardware dependency is dead; substitute noted).
+
+### A. Shell & Navigation
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Custom borderless chrome, minimal window controls | `NONCLIENTCONTROLS.UIX`, `TOPTOOLBAR.UIX` | `MainShellView.axaml` + authentic `WINDOW.*.PNG` | FULL |
+| Panoramic top pivots (4: QUICKPLAY/COLLECTION/DEVICE/SETTINGS) | `PIVOTLIST.UIX`, `Shell.uix` | `NavigationPivot` + opacity-modulated pivot strip (adds SOCIAL/DISC/MIXVIEW — deliberate extension) | FULL |
+| Docked bottom transport (hairline scrub, tri-state heart) | `TRANSPORTCONTROLS.UIX`, `BOTTOMTOOLBAR.UIX` | Docked HUD + authentic transport assets | FULL |
+| Page stack with back navigation | `PAGESTACK.UIX`, `Page.cs`, `ZunePage.cs` | Pivot switching only; back-stack exists solely in Mixview (`MixStack`) | PARTIAL |
+| Search box with autocomplete | `AUTOCOMPLETEBOX.UIX` | Instant header search (no autocomplete dropdown) | PARTIAL |
+| Global keyboard shortcuts | `SHORTCUTKEYS.UIX` | Ctrl+P/B/F/H/T/M/E, F7–F9, Esc | FULL |
+| Min window 734×500 | `Shell.c_minimumWindowWidth/Height` | `MainWindow.axaml` | FULL |
+| Compact mini-player (audio) | `MINIMODE.UIX`, `MINIMODEAUDIO.UIX`, `MINIMODEJUMPLIST.UIX` | `CompactMiniPlayerView` (420×130, Ctrl+M) | PARTIAL (no jump-list hook, no video mini-mode) |
+| Notification area / taskbar integration | `NOTIFICATIONAREA.UIX`, `ZuneTaskbar_Dll` | None (platform-specific) | N-A |
+| Jump lists (recent/pinned tasks) | `JUMPLIST.UIX`, `JUMPINLIST.UIX` | None (Windows shell feature) | N-A |
+| "What's New" hub tile | `WHATSNEW.UIX` | — | MISSING |
+| Animated equalizer icon | `ANIMATEDICONBUTTON.UIX` | 10-frame `ICON.NOWPLAYING.FRAME*` cycle | FULL |
+
+### B. Quickplay
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Pins / History / New 3-deck panorama | `QUICKPLAYSTRIP.UIX`, `QUICKPLAYMODULE.UIX`, `QuickplayPage.cs`, `QuickplayExperience.cs` | `QuickplayView` 3-deck sliding panorama | FULL |
+| Quick Mix one-click mix | `QUICKMIX.UIX`, `QuickMixSessionManager.cs`, `QuickMixPlaylistFactory.cs` | `SmartDJEngine` (local-library scoring) | PARTIAL (substitute; Zune's used marketplace) |
+| Quick Mix progress + notification | `QuickMixProgress.cs`, `QuickMixNotification.cs` | Mix launch + queue population | PARTIAL |
+| Hub hero artwork maps | `QuickPlayMap_*.png`, `SoftwareMap_*.png` | Card-based hero (no artwork maps) | MISSING |
+| Auto-playlist dialog | `AUTOC/ AUTOPLAYLISTDIALOG.UIX` | — | MISSING |
+| Radio panel (streams) | `RADIOPANEL.UIX`, `RadioPage.cs` | — | N-A (dead streams) |
+| Ad/best-value tiles | `BESTVALUE.UIX`, `BILLINGOFFER.UIX` | — | N-A |
+
+### C. Collection (Music)
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Two-column artist discography browser | `ARTISTSPANEL.UIX`, `MusicLibraryPage.cs` | `CollectionView` artists pivot | FULL |
+| Album artwork grid | `ALBUMSPANEL.UIX` | Albums grid with real covers (Phase 4) | FULL |
+| Dense track data table | `TRACKSPANEL.UIX`, `TRACKSPANELCOLUMNS.UIX`, `SPREADSHEET*.UIX` | Songs data table | FULL |
+| Genre hub | `GENRESPANEL.UIX` | Genres card grid | FULL |
+| Playlists + ZPL export | `PLAYLISTS*.UIX`, `PLAYLISTDIALOG.UIX`, `ADDTOPLAYLIST.UIX`, `Microsoft.Zune.Playlist` | `PlaylistsView`, ZPL XML export | FULL |
+| Smart/auto playlists | `AUTOPLAYLISTDIALOG.UIX` | — | MISSING |
+| Metadata editor | `EDITMEDIAINFODIALOG.UIX`, `EDITMEDIAINFOCONTROLS.UIX` | `MetadataEditView` + TagLibSharp writeback | FULL |
+| Find Album Info (per-track match + art) | `FINDALBUMINFODIALOG.UIX`, `FINDALBUMINFOSONGMATCH.UIX`, `AlbumArtUpdateHandler.cs` | Phase 4 art-only lookup (no per-track matching review) | PARTIAL |
+| Folder watching | `FirstLaunchMonitoredFoldersPage.cs`, `ADDTOCOLLECTION.UIX` | Debounced `FileSystemWatcher` | FULL |
+| Ratings (heart / broken heart) | `RATING.LIKEIT/HATEIT.PNG` | Context menus + HUD hearts | FULL |
+| **Video library** | `VIDEOLIBRARY.UIX`, `VideoLibraryPage.cs`, `VideosPanel.cs` | — | MISSING |
+| **Photo library + gallery + slideshow** | `PHOTOLIBRARY.UIX`, `GALLERYVIEW.UIX`, `PHOTOSLIDESHOW.UIX`, `SlideshowLand.cs` | — | MISSING |
+
+### D. Now Playing
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Cinematic artist canvas + Ken-Burns | `NOWPLAYINGLAND.UIX`, `NOWPLAYINGMUSICBACKGROUND.UIX`, `NOWPLAYINGSTYLES.UIX`, `NowPlayingLand.cs` | `NowPlayingView` + real Fanart.tv backdrops (Phase 4) | FULL |
+| Typographic track overlays | `NOWPLAYINGSTYLES.UIX` | 60pt title / 32pt accent artist | FULL |
+| Showlist (upcoming queue drawer) | `TRANSPORT.SHOWLIST.ON/OFF.PNG` | Slide-out showlist drawer | FULL |
+| Lyrics & bio drawer | `NOWPLAYINGLAND.UIX` | Real Wikipedia bios + LRCLIB lyrics (Phase 4) | FULL |
+| Album mosaic wall | `NOWPLAYINGALBUMGRIDDEFS.UIX` | MosaicWall mode | FULL |
+| Auto-hiding HUD | `NowPlayingLand.cs` (idle timers) | 3.5s idle fade | FULL |
+| Now Playing video clips | `NOWPLAYINGCLIPS.UIX` | — | MISSING (no video) |
+| Ambient visualizer | (rendered by Iris engine) | Simulated spectrum bars (no FFT — blocked on audio engine) | SIMULATED |
+
+### E. Mixview
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Constellation graph (seed + orbiting tiles) | `MIXCONTROLS.UIX`, `MIXLAYER.UIX`, `MIXLAYOUT.UIX`, `MixResult*.cs` | `MixviewView` interactive canvas | FULL |
+| MixStack back navigation | `MixStack.cs`, `MixStackEntry.cs` (mirrored 1:1 in `MixModels.cs`) | `MixStack` push/pop + breadcrumb | FULL |
+| Server similarity queries | `MIXQUERY.UIX`, `MixPriorityList*.cs` (marketplace-backed) | Local-library scoring (genre/artist/favorites) | PARTIAL (substitute) |
+| Hover action tiles (play/like/hate/info/add) | `MIX.PLAY/HATEIT/LIKEIT/INFO/ADD.PNG` | Play + Smart DJ actions; rating tiles present but unwired | PARTIAL |
+| Glide-to-center transition | `MIXMANAGER.cs`, Iris animation | Animated re-centering | PARTIAL |
+
+### F. Audio Engine ⚠️ CRITICAL
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Real audio playback (decode + output) | `ZuneSE_dll`, `ZuneCore_Dll`, codec DLLs | `AudioEngine` = position timer only; no NAudio/Bass/WASAPI | **SIMULATED** |
+| Volume control | `TRANSPORTCONTROLS.UIX` slider | Stored property, no signal path | SIMULATED |
+| Crossfade (0–10s) + gapless | `SyncControls`-adjacent playback options | `CrossfadeDurationSeconds` plumbed through UI only | SIMULATED |
+| ReplayGain / volume leveling | `ReplayGainTrackGainDb` fields in `ZuneDBApi` (`TrackMetadata`) | Settings toggle, no DSP | SIMULATED |
+| Sound effects (completion chimes) | `COMPLETEDSYNCBURNCD.WAV` et al. | `SoundEffectService` real WAV playback via OS CLI | FULL |
+| MP3/WMA/AAC encode (rip) | `ZuneEncEngDLL`, `ZuneEncEXE` | Simulated rip progress | SIMULATED |
+| AAC/H.264 decode, EVR/DXVA video | `ZuneAACDec_Dll`, `ZuneH264Dec_Dll`, `ZuneDXVA2_Dll`, `ZuneEvr_Dll` | — | MISSING |
+
+### G. CD Land
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| CD view & disc detection | `CDVIEW.UIX`, `CDSTATE.UIX`, `CDLand.cs` | `DISC` pivot + `CDView` | PARTIAL (no optical-drive detection) |
+| Rip pipeline | `RipState.cs`, `ZuneEncEngDLL` | Simulated progress + authentic chime | SIMULATED (no drive on dev machine — accepted) |
+| Burn pipeline | `BurnableCD.cs`, `BurnSessionItem.cs`, `PURCHASEFORBURN.UIX` | Simulated burn queue + chime | SIMULATED |
+| Completion chimes | `COMPLETEDRIPREVERSESYNC.WAV`, `COMPLETEDSYNCBURNCD.WAV` | Wired to rip/burn completion | FULL |
+
+### H. Device Sync & Lifecycle (hardware-dependent)
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Device land + segmented gas gauge | `DEVICELANDELEMENTS.UIX`, `GASGAUGE.UIX`, `Deviceland.cs`, `DeviceExperience.cs` | `DeviceView` + 6-segment authentic gauge | FULL (data simulated) |
+| Space reservation | `DEVICESPACERESERVATION.UIX` | Slider + GB preview (Settings + Device) | FULL (persisted Phase 4) |
+| Sync options & sync groups | `DEVICESYNCOPTIONS.UIX`, `DEVICESYNCGROUPS.UIX`, `SyncGroup.cs`, `SchemaSyncGroup.cs`, `SyncCategory.cs`, `SyncMode.cs` | Music/podcast rule selection lists | PARTIAL (no real sync-group engine) |
+| Sync animation/toast | `SYNCANIMATION.UIX`, `SYNCINSTRUCTIONTOAST.UIX`, `SYNCNOTIFICATION.UIX`, `SyncNotification.cs` | Status text | MISSING |
+| MTP device contents browsing | `IDeviceContentsPage.cs`, `DEVICEPICTUREVIDEO.UIX` | — | MISSING (N-A without hardware) |
+| Wireless sync | `WIRELESSSYNC.UIX`, `WirelessSyncWizard.cs`, `WirelessSync*.Page.cs` | Wireless settings UI states | SIMULATED |
+| Windows Phone wireless sync | `MOBILEWIRELESSSYNC.UIX`, `MobileWirelessSyncWizard.cs` | — | N-A |
+| Firmware update / restore / rollback | `DEVICEUPDATE*.UIX`, `DEVICE RESTORE*.UIX`, `DeviceRollback*.cs`, `ZuneWmduDLL` | — | MISSING (N-A hardware) |
+| USB bus (kernel driver + enum svc + MTPZ) | `Zumbus.sys`, `ZuneBusEnumSvc`, `ZuneMTPZ_dll`, `ZuneUsbTransport_dll` | `Infrastructure.Devices` simulated sync; `ZuneUsbHttpInterceptor` (localhost placeholder for USB-PPP interception) | SIMULATED |
+| Guest sync | `GuestSchemaSyncGroup.cs`, `FirstConnectDeviceGuestWarning` | — | MISSING |
+
+### I. Podcasts
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Podcast library + series + episodes | `PODCASTLIBRARY.UIX`, `PODCASTSERIESPANEL.UIX`, `PODCASTEPISODESPANEL.UIX`, `PodcastLibraryPage.cs` | `PodcastsView` two-column manager | PARTIAL (RSS-only substitute) |
+| RSS subscription | (marketplace feed in Zune) | Real RSS 2.0 ingest | FULL (substitute) |
+| Episode details dialog | `PODCASTDETAILSPANEL.UIX`, `PodcastEpisodeDetails.cs` | Episode list with descriptions | PARTIAL |
+| Podcast sync limits | `PodcastSyncLimit.cs`, `PODCASTSYNC` | Sync-rule strings in Settings | PARTIAL |
+| Channel/radio integration | `CHANNEL*.UIX`, `Channel*.cs` | — | N-A (marketplace) |
+
+### J. Social / Marketplace / Account — *Zune servers dead (~2011–2015)*
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Zune Card / profile | `PROFILE.UIX`, `PROFILEEDIT.UIX`, `ProfilePage.cs` | `ZuneCardView` + `SOCIAL` pivot (local stats) | N-A — substitute FULL |
+| Achievements/badges | `BADGES.UIX`, `ProfileBadge.cs` | 5 badges with authentic seal asset | N-A — substitute FULL |
+| Friends & messaging | `FRIENDS.UIX`, `INBOX*.UIX`, `FriendsPage.cs`, `Microsoft.Zune.Messaging` | — | N-A |
+| Social composer | `SOCIALCOMPOSER.UIX` | — | N-A |
+| Marketplace, Zune Pass, cart, billing | `CARTPAGE/CARTPANEL.cs`, `Subscription*.cs`, `ACCOUNTCREATION.UIX`, `CREATEPASSPORT.UIX`, `PAYMENTINSTRUMENT.UIX` | — | N-A |
+| DRM state | `DrmStateDescriptions.cs` | — | N-A |
+| Sign-in (Passport/Live) | `SIGNINDIALOG.UIX`, `WINDOWS LIVELIVE.UIX`, `Microsoft.Zune.UserCredential` | — | N-A |
+
+### K. Settings & Management
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| Two-tier management hub | `MANAGEMENT*.UIX` (14 documents) | SOFTWARE/DEVICE tiers, 7 sub-pivots | PARTIAL (subset) |
+| Collection settings (monitored folders) | `MANAGEMENTCOLLECTION.UIX` | COLLECTION sub-pivot + folder picker + scan | FULL |
+| Rip settings | `MANAGEMENTRIP.UIX` | RIP sub-pivot (format/bitrate/destination) | FULL (encoder simulated) |
+| Burn settings | `MANAGEMENTBURN.UIX` | BURN sub-pivot | FULL (burner simulated) |
+| Metadata settings | `MANAGEMENTMETADATA.UIX` | Metadata sub-pivot + provider gating (Phase 4) | FULL |
+| Display settings | `MANAGEMENTDISPLAY.UIX` | Display sub-pivot (accents, themes, compact) | FULL |
+| General/file-type/privacy/sharing | `MANAGEMENTGENERAL/FILETYPES/PRIVACY/SHARING.UIX` | — | MISSING (privacy/sharing partly N-A) |
+| Subscription/purchases/rentals | `MANAGEMENTSUBSCRIPTION/PURCHASES/RENTALS.UIX` | — | N-A |
+| Settings persistence | `ZuneCfg_Dll` | `JsonSettingsStore` (Phase 4) | FULL |
+
+### L. First-Launch & Onboarding
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| First-launch wizard (welcome→folders→filetypes→privacy) | `FIRSTLAUNCH.UIX`, `FirstLaunch*.Page.cs` ×7 | Demo-data seed only | MISSING |
+| First-connect device wizard | `FIRSTCONNECT.UIX`, `FirstConnect*.Page.cs` ×6 | — | N-A hardware |
+| Setup land | `SETUPLAND.UIX`, `SetupLandPage.cs` | — | MISSING |
+
+### M. Platform Services
+
+| Zune 4.8 feature | Evidence | Not-Zune | Status |
+|---|---|---|---|
+| ZMDB database engine (4 variants) | `ZuneZMDB{Classic,Library,Mobile,ZuneHD}DLL`, `ZuneDB_dll` | EF Core + SQLite (single schema) | PARTIAL (substitute) |
+| ZMDB managed API | `ZuneDBApi_Dll` → 1,030 files, 19 namespaces (`MicrosoftZuneLibrary`, `Microsoft.Zune.Service`, `Microsoft.Zune.QuickMix`, `Microsoft.Zune.Playlist`, `Microsoft.Zune.Subscription`, `Microsoft.Zune.User`, …) | `IMediaLibraryService` (+11 other interfaces) | PARTIAL (media core covered; subscription/user/service layers N-A) |
+| Play-history & stats | `MicrosoftZuneLibrary` history tables | `PlayHistoryEntry` + `UserStatsService` | FULL (substitute) |
+| Network media sharing (UPnP/WMC) | `ZuneNssExe`, `ZuneShareEXE`, `ContentDirectoryXML`, `MediaReceiverRegistrarXML` | — | MISSING |
+| Background service host | `ZuneService_Dll` | In-process coordinators | PARTIAL |
+| Multi-language MUI (26 locales) | `ZuneResources_Mui`, `*mui` files | English only | MISSING |
+| Explorer shell extension / launcher | `ZuneShellExt_Dll`, `ZuneLauncherEXE` | — | N-A |
+| x64 build | `zune-x64.msi` | .NET 8 cross-platform (x64/arm64 CI) | FULL |
+| Plugin extensibility | (none in Zune — COM/registry only) | `NotZune.Plugins.Protocol` JSON-RPC scaffold (unused) | FULL (exceeds Zune) |
+
+---
+
+## 4. Deliberate Substitutions for Dead Zune Services
+
+| Dead Zune dependency | Not-Zune replacement |
+|---|---|
+| Zune Marketplace / Zune Pass (catalog, streaming, DRM) | Local library only; Smart DJ from local tracks |
+| Zune Social servers (profiles, messaging, badges) | Local `ZuneCardView` stats + badge engine from SQLite history |
+| Marketplace Quick Mix seeds | Local similarity scoring (album/artist/genre/favorite vectors) |
+| Marketplace podcast catalog | Direct RSS 2.0 subscriptions |
+| Marketplace album art/metadata service | MusicBrainz + Cover Art Archive + Fanart.tv + LRCLIB (Phase 4) |
+| Zune device + ZuneHD wireless sync | Simulated device with authentic UI (real MTPZ deferred until hardware available) |
+
+---
+
+## 5. Phase 5+ Roadmap (ranked)
+
+1. **P0 — Real audio playback engine.** Add NAudio (WASAPI on Windows, ALSA/PulseAudio on Linux) or ManagedBass to `Infrastructure.Audio`; rewire `PlaybackQueueCoordinator` to a real output device. Unblocks: volume, crossfade, gapless, ReplayGain, FFT visualizer, podcast/CD playback. *This is the single highest-leverage parity item.*
+2. **P1 — First-launch wizard** (`FIRSTLAUNCH.UIX` flow): welcome → monitored folders → done, with demo-data decision point.
+3. **P1 — Find Album Info track matching**: per-track MBID resolution + review dialog (`FINDALBUMINFOSONGMATCH.UIX` parity), optionally honoring `WriteTagsToFile`.
+4. **P2 — Smart/auto playlists** (`AUTOPLAYLISTDIALOG.UIX` parity): rule-builder persisted like ZPL playlists.
+5. **P2 — Mixview rating tiles wiring** (like/hate/info/add actions on constellation nodes using the already-extracted `MIX.*` assets).
+6. **P3 — Video support** (playback engine extension + `VIDEOLIBRARY.UIX` view) and **Photo library + slideshow**.
+7. **P3 — Sync UX polish** (sync animation, instruction toast, notification area).
+8. **Deferred (N-A/hardware):** MTPZ device sync internals, firmware update/restore, wireless pairing, UPnP sharing.
+
+---
+
+## 6. Audit Confidence Notes
+
+- Managed-code evidence is complete (`ZuneShell_Dll` + `ZuneDBApi_Dll` fully decompiled); native components (`UIX_*`, `ZuneSE_dll`, `ZuneEncEngDLL`, `ZuneMTPZ_dll`, `Zumbus.sys`) were inventoried but not disassembled at machine-code level — their behavior is inferred from names, interfaces, strings, and the managed layers that call them.
+- UIX documents are compiled `.uib` bytecode in `ZuneShellResources_Dll` RCDATA; the 241 `.UIX` source names + 1,289 asset names used here come from the resource table (assets previously ingested into `src/NotZune.UI/Assets/Zune/`).
+- Feature statuses were verified against the Not-Zune source tree (13 views, 13 view-models, 10 application interfaces, 6 application services, 4 infrastructure projects, 58 passing tests) as of commit `6570600`.