Happy Coder: mobile Claude/Codex UI
An open‑source project called 'Happy Coder' demonstrated a mobile client that lets you control Claude/Codex for on‑the‑go, encrypted AI coding workflows—project has 16k+ GitHub stars and cross‑device sync. The demo is being shared as a pragmatic tool for rapid prototyping of AI-assisted coding on mobile. (x.com)
The main repository slopus/happy currently registers about 16.5k stars and 1,739 commits, with active commits as recently as three days ago. (github.com/slopus/happy) Project documentation and the quick‑start instruct developers to install the CLI with "npm install -g happy-coder" and run "happy" to proxy a local Claude Code/Codex session to mobile or web while asserting end‑to‑end encryption and multi‑device session sync. (happy.engineering) (github.com/slopus/happy) The package is published on npm as happy-coder (latest tagged version 0.13.0, published about two months ago) and an Android listing appears on Google Play under package id com.ex3ndr.happy. (npmjs.com) (play.google.com) A Show HN thread by the maintainers highlights three stated goals—preserve existing workflows, provide true end‑to‑end privacy, and require no traditional accounts—with the thread explicitly noting "Don't break anyone's flow" and that the server only forwards encrypted data. (news.ycombinator.com) (happy.engineering/docs/quick-start) Independent writeups and walkthroughs have proliferated: a how‑to on wenhaofree summarizes architecture and setup, a BrightCoding deep dive published Feb 19, 2026 unpacks the cryptographic model, and multiple community guides show hands‑on mobile workflows. (blog.wenhaofree.com) (blog.brightcoding.dev) The project and its CLI are open source under an MIT license and maintain a companion package repo (happy-cli) for the host wrapper that invokes Claude Code/Codex through the "happy" wrapper binary. (github.com/slopus/happy) (github.com/slopus/happy-cli)
