Sidekick is Companion's native macOS desktop assistant. It brings classic animated desktop characters back as a real local app: an on-screen sidekick, a chat bubble, push-to-talk voice, screen grounding, approvals, and computer-use tools.
The app is built in Swift and packaged as Sidekick.app. It uses locally signed-in
CLI sessions for the assistant brain, keeps provider keys on the user's machine,
and bundles the helper binaries needed for desktop actions in release builds.
This repository contains the app source, sprite assets, packaging scripts, GitHub Actions release flow, and implementation notes.