Mastery — the modern code editor for developers who orchestrate multiple AI agents in parallel.
MSTRY is built around a simple idea: one editor, many agents, zero context switching. Spin up Claude Code, Codex, Gemini, or OpenCode side-by-side — each on its own git worktree, each on its own branch — and stay in flow while they work.
- Multi-agent, multi-project workspace — browse files, read diffs, and drive N agents across M repositories without ever leaving the window.
- Git worktrees, one click — create isolated branches for every experiment. No more stashing, no more stepping on your own changes.
- Persistent terminal sessions — backed by tmux. Close the app, reopen it, your agents are exactly where you left them.
- Built-in Monaco editor — real code editing, syntax highlighting, git diffs, quick open.
- Live agent status — see which of your agents are working, which are waiting for you, right in the tab bar.
curl -fsSL https://raw.githubusercontent.com/IagoLast/MSTRY/main/scripts/remote-install.sh | bashThis clones the repo, builds the app, and installs it into /Applications.
Prerequisites: Node.js, git, and tmux (brew install tmux).
git clone https://github.com/IagoLast/MSTRY.git
cd MSTRY
npm install
npm run dist:installFrom Settings, install the mstry command to open any project from your terminal:
mstry .
mstry ~/code/my-projectRunning multiple AI coding agents in parallel turns your repo into a minefield: they fight over branches, overwrite each other's work, and force you to juggle a dozen terminal windows just to keep track of who's doing what.
MSTRY solves this with a three-level hierarchy:
Project → a git repository
└─ Worktree → an isolated branch
└─ Agent → a persistent terminal session
Each agent lives inside its own worktree, so they can't collide. You stay in one window, one editor, with full visibility into every agent's status.
- Live agent status — MSTRY detects Claude Code, OpenAI Codex, Gemini CLI, and OpenCode processes in your terminals and shows whether they're working or idle.
- One-click CLI install — install Claude, Codex, Gemini, or OpenCode from Settings. Enable hook-based status tracking per tool.
- Configurable default command — set
claude(or anything else) to launch automatically in every new tab. - Persistent tmux sessions — every tab is backed by tmux. Close MSTRY, reopen it, pick up exactly where you left off.
- Create & delete worktrees from the sidebar. MSTRY runs
git worktree addwith a new branch, cleans up the folder, prunes metadata, and deletes the local branch on teardown. - Checkout main on any project with a single click.
- Multi-repo — add as many projects as you want; drag to reorder them.
- Monaco-powered editor with syntax highlighting for 20+ languages.
- Quick Open (
⌘P) — fuzzy-find any file in the workspace powered by ripgrep. - Git panel — see changed files, filter them, click to open a side-by-side diff against HEAD.
- Unsaved-change indicators on tabs.
Screenshots of the editor and git panel coming soon.
- Command palette (
⌘K) — every action, one keystroke away. - Drag-and-drop tabs — reorder terminals and editors freely.
- Zoom controls — scale the terminal font on the fly.
- Tmux mouse mode toggle (
⌘M) — copy-paste with the mouse when you want, or hand control to tmux when you don't.
| Shortcut | Action |
|---|---|
⌘K |
Command palette |
⌘P |
Quick open file |
⌘T |
New terminal tab in current worktree |
⌘Shift+C |
New Claude agent tab |
⌘W |
Close current tab |
⌘S |
Save file (in editor tabs) |
⌘B |
Toggle sidebar |
⌘M |
Toggle tmux mouse mode |
⌘1–⌘9 |
Switch to tab N |
- Electron + electron-vite — desktop shell
- React 19 + TypeScript — UI
- Monaco Editor — code editing and diffs
- xterm.js + node-pty — real terminal emulation
- tmux — session persistence
- ripgrep — fuzzy file indexing
- Tailwind CSS v4 + Radix UI — styling and primitives
- @dnd-kit — drag-and-drop tabs
npm install
npm run devBuild a distributable bundle:
npm run distThe packaged app lands in release/.
MIT