OpenAI Codex CLI: Lightweight coding agent that runs in your terminal

OpenAI Codex CLI Lightweight coding agent that runs in your terminal npm i -g @openai/codex Quickstart Install globally: npm install -g @openai/codex Next, set your OpenAI API key as an environment variable: export OPENAI_API_KEY= " your-api-key-here " Note: This command sets the key only for your current terminal session. To make it permanent, add the export line to your shell's configuration file (e.g., ~/.zshrc ). Run interactively: codex Or, run with a prompt as input (and optionally in Full Auto mode): codex " explain this codebase to me " codex --approval-mode full-auto " create the fanciest todo-list app " That’s it – Codex will scaffold a file, run it inside a sandbox, install any missing dependencies, and show you the live result. Approve the changes and they’ll be committed to your working directory. Why Codex? Codex CLI is built for developers who already live in the terminal and want ChatGPT‑level reasoning plus the power to actually run code, manipulate fil ... Read full article.