cto

cto is the command-line interface for cto.new — an AI-powered engineering agent in your terminal.

Install

macOS — Homebrew (recommended)

brew install engine-labs/cto/cto

macOS / Linux — curl

curl -fsSL cto.new/install | bash

Windows — PowerShell

irm https://cto.new/install.ps1 | iex

Then cd into any repository and run:

cto

The first launch opens your browser to log you in via cto.new; subsequent launches are silent. Use cto login to re-authenticate or switch accounts, or /cto-login from inside an opencode session.

Updating

cto upgrade

If you installed via Homebrew, use brew upgrade cto instead — cto upgrade will detect the brew-managed binary and refuse rather than overwrite it.

Help & community

For help, bug reports, or feature requests, join the Discord: https://discord.gg/cto.

License

Proprietary. See LICENSE. Embedded third-party components retain their original licenses; run cto --licenses for the full notices.