what is cxx fr?

CXX, also written as C-cha-cha, is a tool that lets you monitor and remotely control your ChatGPT or Claude Code coding assistant sessions from your phone, primarily through WeChat but also through any mobile browser. Because these AI coding sessions can run for ten minutes to an hour on their own, this project lets you step away from your computer and still check progress, approve commands the AI wants to run, send new instructions, and get notified when a task finishes or gets stuck waiting for approval. A small program called a daemon runs on your desktop computer, either macOS, Windows, or Linux, and pairs with your phone through a QR code scan. Once paired, your phone can view and take over both ChatGPT and, if the Claude Code command line tool is detected on your machine, Claude Code sessions as well. There is also a terminal mode that opens a genuine remote terminal window on your computer, fully rendered on your phone using xterm.js, which can run Claude Code, OpenCode, Codex CLI, Gemini CLI, or a plain shell, and keeps running even if your phone locks or loses connection. When your phone and computer share the same WiFi network, the connection goes directly peer to peer for fast, low latency communication, and it falls back to a relay server when they are on different networks. All traffic is end to end encrypted using X25519, HKDF-SHA256, and AES-256-GCM, and the project includes a pure JavaScript fallback for phones whose browsers lack native support for that encryption, so security is not weakened on those devices. Notifications sent to your phone only include a brief summary of what happened, never the actual commands, code, or file paths, which is described as a deliberate security choice. The project also supports read only sharing links so someone else can watch an AI session work without being able to interact with it. Installation is a single command for macOS, Linux, or Windows that downloads and verifies the latest release. This is aimed at developers who use ChatGPT or Claude Code for long running coding tasks and want to stay connected to those sessions while away from their desk.