Constellation CLI
Houston, stand by for intelligence. Command your AI fleet from a single terminal — multiple minds, parallel insights, unified workflow.
Free.
What it does
Run Claude, Codex, and Gemini in side-by-side panes — or a custom set you configure — with one command.
Multi-AI orchestration
Run Claude Code, OpenAI Codex, and Google Gemini in three live panes. Compare answers, cross-check reasoning, route the same prompt to every model at once.
Flexible layouts
Vertical three-column split by default, or --horizontal for three stacked rows. Override any pane with --left, --middle, and --right — AI commands, dev servers, log tails, anything.
Cross-platform
tmux on macOS and Linux, Windows Terminal on Windows. The same npx command launches the same layout on every supported platform, with a graceful fallback for plain CMD and PowerShell.
Lean and portable
Pure Node.js (18+). No native bindings, no Docker, no daemon. Installs cleanly via npx; runtime footprint is a handful of small npm packages.
Presets and config
Define defaults and named presets in ~/.constellationrc.json — development, debugging, fullstack, monitoring, or your own. A programmatic API is available for custom integrations.
Built to ship
Semantic versioning, CI on every commit, ESLint + Prettier + TypeDoc in the toolchain. Designed to drop into a professional development workflow without surprises.
Three minds, one terminal.
One npx command brings up Claude, Codex, and Gemini side by side. Free to download and use.