Agent Setup

Atom needs the Codex CLI running on your machine to work.

Install Codex

  1. Make sure you have Node.js installed
  2. Open Terminal and run:
npm install -g @openai/codex
  1. Run codex login and follow the sign-in prompts with your OpenAI account

Full details: Codex on GitHub

Getting a permission error? Some Mac setups need elevated privileges to install global packages. If you see “EACCES” or “operation rejected”, run this instead:

sudo npm install -g @openai/codex

You’ll be prompted for your Mac password. This is normal.

Back in Atom

Once Codex is installed and signed in, return to Atom. Start a new chat or send another message. If Atom doesn’t pick it up right away, tap Refresh in the top-right corner of the setup screen.

Troubleshooting

  • Atom doesn’t detect Codex: Restart After Effects and tap Refresh in Atom. Verify the agent works by running codex --version in a terminal.
  • Non-standard install path: Make sure the binary is on your system PATH so Atom can find it.