Three edits to the scaffold, each of which the generated tree gets
wrong for a shipped app.
**The phone ABI got a debug library.** Upstream's `build` task forwards
ARCH to compile:go:shared but not PRODUCTION, so the arm64 leg
recomputed BUILD_FLAGS against an unset variable and took the debug
branch -- while amd64, which package:fat calls directly with
PRODUCTION: "true", was correct. A release APK therefore shipped a 40MB
unstripped debug library for the only ABI a release is for, beside a
31MB production one for the emulator. 34MB APK before, 27MB after.
**The APK could be installed once and never updated.** Android orders
releases by versionCode and refuses anything not greater than what is
installed; the scaffold hardcodes 1, so the first install would have
been the last and the only way out is an uninstall, which takes the
user's library with it. It comes from YJ_VERSION_CODE now, which CI
derives from the tag (1.3.1 -> 10301, monotonic while minor and patch
stay under 100), with a default that keeps a local build working.
Integer.parseInt, not `(...) as Integer`: Groovy binds the call
parentheses to versionCode before the cast, so the latter reads as
`versionCode("1") as Integer` -- it sets a String, then casts the
setter's null return, and Gradle fails the whole project with "Value is
null" pointing at that line.
**And it identified itself as com.wails.app.** applicationId is
app.yellowjacket now, matching build/config.yml's productIdentifier,
and the label is YellowJacket rather than "Wails App".
Two things follow from that rename and both bite:
The identity is declared twice. applicationId is what Gradle installs;
APP_ID in build/android/Taskfile.yml is what every adb-driven task
uninstalls, launches and filters, and nothing enforces agreement.
ANDROID.md says to set APP_ID in build/config.yml -- that does nothing
in beta.8, checked both ways: `wails3 task` builds its var set from CLI
KEY=VALUE arguments and the Taskfile tree and never reads config.yml,
and even when set it feeds only those adb commands, never Gradle.
And `namespace` deliberately stays com.wails.app, because that is the
Java package MainActivity and WailsBridge live in and renaming it means
renaming their source. So the launcher activity is
app.yellowjacket/com.wails.app.MainActivity, and the short
`.MainActivity` form resolves the dot against the applicationId and
fails with a class-not-found that reads like a broken build.
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.