A Universal Remote for AI Coding Agents

What it does

Happier is a cross-platform client that sits on top of AI coding agents like Claude Code, Codex, OpenCode, and Gemini. It runs the actual agent locally on your machine, then mirrors the session state to a web, desktop, or mobile interface so you can monitor, steer, or hand off the conversation from another device. The project also bundles voice control, collaborative session sharing, and an embedded terminal into the same interface.

The interesting bit

The project started as a spin-off from Happy because the authors needed faster iteration; it now acts less like a simple wrapper and more like a universal remote for terminal agents, complete with session forking, replay, and machine-to-machine handoffs. Everything is end-to-end encrypted by default, and the server can be self-hosted for teams that want GitHub OAuth, OIDC, or mTLS gating.

Key highlights

• Supports a wide roster of backends: Claude Code, Codex, OpenCode, Gemini, GitHub Copilot, Kiro, Kimi, Qwen, Augment, and any ACP-compatible CLI.
• Lets you attach to, fork, replay, and hand off live sessions between machines without losing provider state or project context.
• Includes a voice assistant that monitors sessions and answers permission requests, not just speech-to-text.
• Enterprise deployment options: self-host with storage policies ranging from end-to-end encrypted to plaintext-only, plus feature flags to disable voice, social, or attachments per server.
• Global inbox and pending queue aggregate permission requests and queued messages across all sessions and devices.

Caveats

• The project is explicitly in alpha preview and warns that it “might be buggy here and there.”
• The Android Play Store build is currently in private beta, so mobile access on Android requires joining a Google Group or sideloading an APK.

Verdict

Developers who juggle multiple machines or want to keep an eye on long-running agent tasks from their phone should look here; if you only ever code on a single laptop and prefer talking directly to Claude Code in your terminal, you probably do not need the extra relay.