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a11y.md flagged --yj-text-tertiary on --yj-bg-surface as 'borderline (~4.1:1) but that needs a real measurement', and plan 007 parked it as 'worth measuring before planning'. Measured, against the rendered app and then across all three background ramps: it failed AA in nine of twelve text/surface combinations, as low as 2.31:1 on dark's overlay and 2.55:1 on light's -- the app's most-used secondary text colour, failing on every view. Not borderline. 110 failing nodes across twelve views, now 0 of 659. Three separate mechanisms, and only the first is the finding: - The ramps. Tertiary is raised per ramp (#a6a6a6 dark, #949494 darker, #5c636a light), sized to the lightest surface it actually sits on and keeping its hue. Sizing it to bgOverlay too would need a grey lighter than secondary, so bgOverlay is documented as not a text surface and the one component that put text there uses primary. - The avatar generator. hsl(hue, 45%, 35%) behind white initials failed for 35 of the 360 hues -- the yellow-green band -- so which artists were unreadable depended on how their names hashed. The two a sweep found were not the finding. 32% clears every hue. - Jobs' local #ff6b6b, at 4.15:1 on elevated. Pinned by a unit test over the palette table rather than a DOM sweep: the ramps are pure data, and checking only what happens to be on screen is exactly how the light ramp went unexamined. Note that make ui-visual cannot see any of this -- the component tier renders the fallbacks, because theme-store sets :root only in the real app.
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 | v2 (go install github.com/wailsapp/wails/v2/cmd/wails@latest) |
On Linux, install the system libraries Wails needs:
sudo apt-get install libasound2-dev libgtk-3-dev libwebkit2gtk-4.1-dev
macOS and Windows need no extra system packages. Run wails 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.