Reference
Desktop App (Retired)
Quack used to be a desktop app. What happened to it.
Quack started as a desktop app for running many Claude Code agents at once, with a visual interface, a task hub and a second brain for project knowledge.
The part that mattered most was spending fewer tokens, so that is what Quack is now: a plugin for the Claude Code you already use. The app is retired and no longer maintained.
Its source code stays on GitHub: AlekDob/quack-app.
Old links
Pages that described the app now redirect here or to the closest plugin page.