If you work with Claude Code, Codex, or Gemini in a terminal, you bounce between five apps all day. Nexion puts them in one native macOS window: Ghostty terminal, WebKit browser with isolated profiles, file manager, Git with AI commit messages, tmux session manager, Excalidraw canvas, notes, plugins, and a CLI with IPC socket. Bring your own keys for Anthropic, OpenAI, Codex, Gemini, or GitHub Models. Apple Silicon, macOS 15+. Not Electron.