Happy

Happy is an open-source remote control that lets you manage Claude Code and Codex coding agents from your phone, tablet, or browser while they run on your computer. When an agent needs approval or encounters an error, Happy notifies you and lets you respond from anywhere, then sends the agent back to continue in the same session with full context preserved.

The tool uses end-to-end encryption so your code, prompts, and session data remain private—only encrypted blobs pass through Happy's backend. Available as a CLI tool, native macOS app, and mobile apps for iOS and Android, it's designed for developers who want their coding agents to keep working even when they step away from their desk.