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The contrast pass found two things larger than itself, both recorded as not-fixed. This is them. The semantic colours were 'fixed across themes', and one fixed colour cannot clear 4.5:1 against both a near-black and a near-white surface: --yj-error measured 2.55:1 on dark's elevated, --yj-info 2.31:1, and success and warning failed on dark and light both. They are split by the question they answer. A *fill* is 'what colour is a danger button' -- red in every theme, unchanged -- and a *text* colour is 'what colour is the word failed on this background', which is now per ramp. Every fill also carries a computed foreground. White on the default accent is 1.43:1, and the accent is a colour picker, so no fixed answer survives it: --yj-accent-fg and the four semantic -fg values are derived (white if white clears, else black), which keeps a red danger button white and flips a green or amber one to black. Two accent buttons took their foreground from --yj-bg-base, which inverts with the ramp -- that is exactly the white-on-yellow 'Apply (A)' the light theme showed. Accent used as text gets the same treatment through accentTextOn(), which mixes along the hue until it clears the ramp's surface and stops. On both dark ramps it returns the accent unchanged, so the dark themes are visually untouched by that half. Measured across three ramps and twelve views: 2237 nodes, 0 failing, against 110 on dark and 50 on light before. Borders, outlines and shadows were explicitly kept on the fill token -- a border is not text, and the first pass of the rewrite moved 30 of them by accident.
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.