Happy

Happy is an open-source remote control for coding agents that lets users manage sessions from mobile devices.

Happy is an open-source remote control for coding agents such as Claude Code and Codex running on your own computers. It allows users to start, steer, approve, and review tasks from iOS, Android, or the web, and then continue the same session in the terminal. The platform addresses the issue of coding agents stopping mid-task for permission or input by notifying users on their phones. Every session is end-to-end encrypted so that code, agent, and encryption keys remain strictly on personal devices. The backend only handles encrypted ciphertext and never receives the key to decrypt prompts, responses, code, or context.

Happy at a glance

Best for: Software engineer
Runs on: Web, iOS, Android, CLI
Pricing: Free
Released: July 2025
Category: AI coding tool
Website: happy.engineering

Key features

Remote control for coding agents
Real-time alerts for agent input requests
End-to-end encryption for all sessions
Cross-device session continuation
Terminal integration via CLI
Open-source client, CLI, and server

Use it for

Managing coding agents from a mobile phone
Approving agent permissions while away from the desk
Reviewing coding agent output on iOS and Android
Continuing terminal sessions on mobile devices

Alternatives to Happy

OpenCode — Works with 75+ model providers, local models, and existing subscriptions
Coucou — It provides open-source, real-time agent monitoring and approvals directly from the screen notch.
Codeg — Run multiple AI coding agents together and manage them from mobile devices.
Agent Pets — Approve agent permission prompts and send replies directly from any browser tab
Codync — Delegate tasks to local coding agents from mobile devices and computers.
opcode — Turns terminal Claude Code workflows into an intuitive visual interface.
Snippet Service — It runs locally, keeps sessions on disk, and provides a companion app for remote steering.
Jep — Connects multiple coding agents to your mobile device or desktop through one interface.
Inyon — Monitor and control coding agents from your phone or browser with encrypted tunnels.
Agent Archive — Hand off coding sessions between Claude Code, Codex, and Cursor across machines.
Agent OS — Manage AI coding sessions side by side and check on them from your phone.
HAPI — Runs agents locally on your machine while letting you control them from mobile devices.

All Happy alternatives