Terminal for agentic workflows
The operator console for AI agents — GPU-accelerated, scriptable, under 5 MB.
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Overview
Attyx is a GPU-accelerated terminal built for the agentic era. It's agent-aware end to end: it tracks agent lifecycle natively and exposes the full terminal surface over an IPC layer, the attyx CLI, and MCP — so one agent can spawn, watch, and drive others across panes.
The terminal fundamentals — sessions, splits, tabs, popups, a status bar, command palette — are all built in. No tmux + config pile. Written in Zig, GPU-rendered on Metal (macOS) and OpenGL (Linux), a single binary under 5 MB.
Agent status, at a glance
Attyx reads each agent's lifecycle — Claude and Codex via JSON lifecycle hooks, opencode via an event-bus plugin — and paints a colored dot on its pane. Run a swarm and tell at a glance which one needs you, right from the tab and status bars.
| State | Meaning | |
|---|---|---|
| 🟠 | Working | The agent is thinking or running a task |
| 🟣 | Waiting | It's paused for your input |
| 🟢 | Idle | Done — nothing in flight |
Drive it from anywhere
Every pane has a stable ID. Over a Unix socket, one agent spawns panes, sends keystrokes, and reads output from any other — no focus change, no guesswork.
# spawn an agent in a new pane, capture its id id=$(attyx split v --cmd "claude -p 'run tests'") # read what it's doing — anytime, no focus change attyx get-text -p $id # nudge it when it pauses for input attyx send-keys -p $id "yes{Enter}" # clean up when it's done attyx split close -p $id
It speaks MCP, too: attyx mcp is a stdio bridge for every platform, and an embedded loopback HTTP MCP server (http://127.0.0.1:7333/mcp, POSIX) hands the same tools — panes, tabs, keystrokes, output, sessions, agent status, image injection — to Claude Desktop and any MCP client. The Claude Code skill drops in with attyx skill install.
Built-in terminal craft
Everything you'd usually bolt on with plugins and a config pile, in the box:
| Splits & tabs | Vertical/horizontal splits, tabs, and floating popups — no plugins |
| Sessions | Daemon-backed; close the window, reopen tomorrow, every pane intact |
| Command palette | Fuzzy-search every action with Cmd+Shift+P / Ctrl+Shift+P |
| 22 themes | Catppuccin, Dracula, Gruvbox, Nord, Tokyo Night… or drop in your own |
| VT-compatible engine | Deterministic and predictable — true color, reflow, scroll regions |
| And more | Regex scrollback search · vim-style visual mode · Kitty images · scriptable status bar · TOML config with hot reload |
→ Full feature reference in the documentation.
Install
Homebrew (macOS)
brew install semos-labs/tap/attyx --cask
Homebrew (Linux x86_64)
brew install semos-labs/tap/attyx
On Linux, Attyx installs as a desktop application. It should appear in your app launcher automatically. If it doesn't, log out and back in to refresh the desktop entry cache.
Build from source
Requires Zig 0.15.2+. On Linux, install build dependencies first:
sudo apt install libglfw3-dev libfreetype-dev libfontconfig-dev libgl-dev
Configuration
Attyx is configured via ~/.config/attyx/attyx.toml. See the configuration docs for all available options, or check the included config/attyx.toml.example for a quick-start template.
Origin
I started Attyx because I wanted to understand how terminals actually work — and I wanted to learn Zig. Weekend experiment that got out of hand. I'm daily-driving it now and it's solid enough for real work, so here it is.
Why not Ghostty or Kitty? Both are great — I used both before this. But I needed to build my own to really understand what's going on. And no, I didn't steal from Ghostty. "GPU terminal in Zig" is a category, not a trademark. Not a single matching line of code.
Part of Semos Labs — a constellation of terminal-native tools.
MIT Licensed