Mexus

M.E.X.U.S. = Multi-agent Execution Unified System

Mexus is the execution layer for multi-agent development. It turns scattered CLI AI agents into a unified local system: run them, observe their status, and review their work from one operator console.

mexus-720.mov

Current Features

🖥️ Multi-Agent Execution

• Supports multiple agents: Claude Code, OpenCode, Aider, Codex, Gemini
• Each agent runs as a managed execution pane
• Create, close, restart, and resume agent executions
• Real-time status indicators (running / waiting / idle / stopped / error)
• Floating bottom shell terminal, always accessible

🔀 Git Worktree Isolation

• Each agent can work in its own isolated Git worktree
• Parallel development on independent branches without conflicts
• Branch name and file change count displayed in pane headers

📊 Runtime Observation

• Automatically parses Claude Code statusline for runtime info
• Live display of model name, context usage %, cumulative cost, session ID
• Agent state is persisted under .nexus/ for local session continuity

📁 Unified Review Surface

• Live file tree with automatic change detection (chokidar)
• Built-in code viewer with Shiki syntax highlighting
• Git diff panel for repo-level change inspection

⌨️ Shortcuts & Command Palette

• Cmd/Ctrl+K — Open command palette
• Cmd/Ctrl+N — New agent pane
• Cmd/Ctrl+1-9 — Switch between panes
• Cmd/Ctrl+G — Open Git diff
• Theme switching via command palette

🎨 Themes & Layout

• Resizable four-column layout: Sidebar / Agent Panes / Editor / File Tree
• 7 built-in themes: Dark IDE, GitHub Dark, Dracula, Tokyo Night, Catppuccin, Nord, Light IDE
• Responsive scaling for large screens

📝 Configuration

• YAML-driven config at global (~/.nexus/config.yaml) and project level
• Per-agent working directory and task description
• Session start modes: new session or resume a selected prior session

Some internal paths and compatibility identifiers still use the historical Nexus name. These remain unchanged to preserve existing projects and local configuration.

Installation & Usage

# Install globally
npm install -g mexus-cli

# Recommended: start Mexus Hub
mexus hub

# Start a single workspace directly
mexus

# Start a single workspace with a specific project path
mexus ~/projects/my-app

# Initialize project config
mexus init ~/projects/my-app

# Check workspace status
mexus status

# Stop the server
mexus stop

# Custom port
NEXUS_PORT=8080 mexus

# Custom Hub port
NEXUS_HUB_PORT=8081 mexus hub

Development

# Install dependencies
pnpm install

# Dev mode (build frontend, then start server with watch)
pnpm dev

# Full dev mode (frontend + backend hot reload in parallel)
pnpm dev:full

# Production build
pnpm build

# Start production server
pnpm start

Tech Stack

Backend

• Node.js 22+, TypeScript, Fastify 5, @fastify/websocket
• node-pty (terminal process management)
• chokidar (file watching), simple-git (Git operations)

Frontend

• React 18, TypeScript, Vite 6
• Tailwind CSS v4, xterm.js, Zustand
• Shiki (syntax highlighting), react-diff-view, cmdk

Architecture

Browser (React + WebSocket)
    ↕
Node.js Server (Fastify)
    ↕
CLI Agent Processes (node-pty)

License

Copyright (c) 2026 yofine

Licensed under the Apache License, Version 2.0. See LICENSE and NOTICE for details.

"Mexus" and "M.E.X.U.S." are trademarks of yofine. The Apache License 2.0 does not grant permission to use these names. Forks must be rebranded.

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