slopus/happy

Orchestrate Claude, Codex and Grok in one app. Open-source (MIT), reuses the subscriptions you already pay for.

What it solves

Happy provides a way to use multiple AI providers (such as Astra, Fable, and Grok) within a single session without needing additional subscriptions. It allows users to leverage their existing paid plans for various models and syncs these sessions across desktop and mobile devices.

How it works

Happy acts as a "harness" that wraps existing AI tools (like Claude Code and Codex). It includes a relay server for end-to-end encrypted synchronization between devices and a mobile app for remote session control. While the original CLI allows terminal-based access, the full experience is expanded via a desktop app and a dedicated agent runtime.

Who it’s for

Developers and power users who want to switch between different AI models in one task, collaborate with others in real-time (multiplayer mode), and maintain access to their AI sessions on the phone.

Highlights

  • Multi-provider sessions: Switch models or delegate to subagents mid-task.
  • Reuse subscriptions: Use existing paid plans from providers like Claude, Codex, and Grok.
  • End-to-end encryption: Securely sync sessions between desktop and mobile.
  • Multiplayer capability: Invite others to watch and steer an agent in real-time.
  • Open source: MIT licensed and runs on local hardware.

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