Happier is an open-source, end-to-end encrypted companion for Claude Code, Codex, OpenCode, and more. Control sessions from your phone, web UI, or desktop — without losing context. Ever.
Start coding on your laptop. Step away for coffee. Pick up on your phone. Your AI agent never stops — and neither does your context.
Run your AI coding agent in the terminal as usual. Happier wraps it with session persistence and encrypted sync — no configuration changes needed.
Open the Happier app on your phone or browser. View pending approvals, send prompts, monitor progress — with full access to your conversation history.
Your session picks up exactly where it left off — on any device. After a restart, a coffee break, or switching machines. Context survives.
Seamless handoff between terminal, web UI, and mobile. Your AI agent keeps working — and you keep context — no matter which device you pick up.
tmux-backed resume survives restarts, sleeps, and network interruptions. Archive sessions and return weeks later with full conversation history intact.
Built on TweetNaCl — the same cryptography as Signal. Your keys never leave your devices. Servers store encrypted blobs they literally cannot read.
Talk to your AI coding agent. Local TTS/STT with ElevenLabs or Kokoro. Dictate prompts, hear responses, run your agent hands-free.
Claude Code, Codex, Gemini, OpenCode, Augment Code, Qwen — Happier speaks all of them. Switch between providers without leaving your workflow.
Self-host your own relay server. GitHub OAuth with org/team gating, OIDC (Okta and any provider), mTLS certificate auth, and BYO identity provider.
Happier uses TweetNaCl cryptography — the same library that powers Signal. Your data is encrypted on-device before it ever hits the wire. The relay server stores encrypted blobs. Your encryption keys never leave your devices. Even if someone compromises the server, they get noise, not code.
Happier is a community-driven project, built in the open. No VC pressure, no feature bloat, no telemetry. Just the tool you need to work with AI coding agents on your terms — wherever you are.