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Three of plan 016's four blockers. Each is a different reason the app could not work at all on a phone. **It had no permission to read anything.** The generated manifest asked for INTERNET, VIBRATE, biometrics, location and a camera, and nothing whatever about storage -- so at targetSdk 35 the app could see its own private directory and no music. It now declares READ_MEDIA_AUDIO, the two capped legacy storage permissions, and MANAGE_EXTERNAL_STORAGE. That last one is deliberate and is the load-bearing choice. This app is a library manager: audio_files.file_path is the primary key of ownership, the scanner walks a directory the user chose, and tagwriter rewrites files in place. MediaStore offers no stable directory to walk and no in-place write, so scoped storage is not "more work" here, it is a different application. MANAGE_EXTERNAL_STORAGE is Play-restricted, which is acceptable only because this ships as an APK through the package registry -- if it ever targets Play, that line is what has to go, and plan 016 says what replaces it. It is granted on a Settings screen rather than in a dialog, so it cannot be requested with requestPermissions(). MainActivity opens that screen on every cold start until access exists -- there is no degraded mode worth offering -- and re-checks in onResume, because the way back from another task is a resume, emitting android:storageAccess so the frontend can react. **The first-run flow could not complete.** All three call sites asked for a folder through the Wails dialog, which returns an error on Android: SAF yields tree URIs and this app is keyed on paths. So the app browses the filesystem itself, which it can now do. ListDirectories lists directories only (the thing being chosen is a library root), skips what it cannot stat rather than failing the listing (Android's storage root holds directories no app may enter), follows symlinks (os.DirEntry reports the link, so a symlinked music folder would silently vanish), and hides dotted entries. utils/pick-directory.ts is the one place that chooses between the two, so the three call sites changed by one line each. **Which platform is asked of the backend**, not of System.IsAndroid(): the dialog is backend code, so the backend is what knows whether it can open one; it answers for iOS at the same time; and it keeps the fallback testable through the ordinary transport fake rather than a module mock of the Wails runtime, whose platform helpers read build constants. **And MPRIS was compiled into the Android build**, because android implies the linux build tag, so it went looking for a session bus that does not exist. mpris_linux.go is `linux && !android` now and the stub covers Android, which means no lock-screen transport there yet -- a missing feature rather than a broken one, and the remaining blocker. The foreground service is typed mediaPlayback rather than the scaffold's dataSync, with the matching permission, so playback can survive the screen locking once there is a MediaSession to drive it. The type in the manifest and the one passed to startForeground must agree or startForeground throws.
YellowJacket
Music how it was meant to bee.
YellowJacket is a fast, cross-platform desktop music player for your local collection. It plays your files, keeps your library tidy, and helps you discover and organize your music — all in a clean, responsive interface. No accounts, no streaming, no telemetry: just your music on your machine.
Runs on Linux, macOS, and Windows.
Features
Play your music
- Plays MP3, FLAC, OGG Vorbis, and WAV
- Play, pause, seek, and volume control with a mute toggle
- Gapless, glitch-free seeking backed by a read-ahead buffer
- A queue you can add to, reorder, and shuffle, with play-next support
- Shuffle and repeat (off / all / one)
- Picks up right where you left off — remembers your track, position, and volume between sessions
- Media-key and MPRIS support on Linux, so your desktop's playback controls just work
Keep your library organized
- Point it at your music folders and it scans them automatically
- Reads tags and embedded cover art, and de-duplicates artwork so it isn't stored twice
- Incremental sync — only new or changed files get reprocessed, and deleted files are cleaned up
- Browse by album, artist, or genre, or search across everything
- Mark favorites and see what you've been listening to with play history
- Edit track tags directly when something's off
Playlists
- Create playlists, drag tracks in, and reorder them
- Smart playlists that build themselves from rules (by genre, rating, play count, and more)
- Pin a default playlist and spot duplicate tracks at a glance
Discover and clean up (powered by MusicBrainz)
- Explore — browse artists, releases, and genres from the MusicBrainz catalog, not just what's already in your library
- Auto-tag — match your files against MusicBrainz to fill in correct artist, album, and track metadata, with a review step before anything is written
- Lyrics search — find a track by a line you remember
Install
Download the latest build for your platform from the releases page.
| Platform | Download |
|---|---|
| Linux | yellowjacket-linux-amd64 |
| macOS | yellowjacket-darwin-universal.app.zip (Apple Silicon + Intel) |
| Windows | yellowjacket-windows-amd64.exe |
Prefer to build it yourself? See Building from source.
Getting started
- Launch YellowJacket.
- Open Settings and add the folder(s) where your music lives.
- Let the initial scan finish — you'll see progress as it works.
- Browse by album, artist, or genre, queue something up, and press play.
Your library and settings are stored locally:
| Linux / macOS | Windows | |
|---|---|---|
| Config | ~/.config/yellowjacket/ |
%LOCALAPPDATA%\yellowjacket\config |
| Library data | ~/.local/share/yellowjacket/ |
%LOCALAPPDATA%\yellowjacket\data |
Building from source
YellowJacket is built with Go and a Lit/TypeScript frontend, bridged by the Wails framework.
Prerequisites
| Tool | Version |
|---|---|
| Go | 1.25+ |
| Node.js | 22+ |
| pnpm | 10+ |
| Wails CLI | v3 — vendored, no install needed (go tool wails3) |
The Wails v3 CLI resolves from the tool block in go.mod, so there is nothing
to install globally; make setup fetches it with the rest of the tooling.
On Linux, install the system libraries Wails needs. v3 builds against GTK4 + WebKitGTK 6.0 by default:
sudo apt-get install libasound2-dev libgtk-4-dev libwebkitgtk-6.0-dev # Debian/Ubuntu
sudo pacman -S alsa-lib gtk4 webkitgtk-6.0 # Arch
A machine without webkitgtk-6.0 can still build with -tags gtk3 against the
older WebKit2GTK 4.1 stack, but that is an escape hatch, not what CI or a
release builds.
macOS and Windows need no extra system packages. Run go tool wails3 doctor to
check your environment.
Build
make setup # install tooling and git hooks
make dev # run with hot-reload
make build-prod # produce a release binary
More detail for contributors lives in
docs/dev/overview.md and CLAUDE.md.