I've been building something in the same spirit but open-source, cross-platform, and multi-model: AionUi. It's a free desktop GUI (Electron-based) that turns popular command-line AI tools into a unified "Cowork" workspace: Supports Claude Code, Gemini CLI, Codex, Qwen Code, Goose CLI, Auggie, etc. (auto-detects installed CLIs)

- Custom LLMs – Full support for customizable third-party LLMs. - Multi-session chats with independent contexts, stored locally in SQLite (data never leaves your device) - Real-time preview & editing panel for 9+ formats: PDF, Word, Excel, PPT, code diffs, Markdown, images, HTML... - AI image generation/editing (Gemini-powered, with recognition) - Smart file management: batch rename, auto-organize, classify, merge - Parallel multi-tasking (sessions don't interfere) - WebUI mode: remote access from phone/browser, still local data - Cross-platform: macOS, Windows, Linux - Fully customizable UI via CSS

Just like Claude Cowork simplifies Claude Code for non-devs, AionUi aims to do the same for all your CLI AI agents.

GitHub: https://github.com/iOfficeAI/AionUi (3.5k stars, Star if it looks useful – no pressure!)