openai/codex

Overview

Codex is a Rust-based, terminal-first coding agent that integrates with your local development workflow to help scaffold code, refactor, and run commands from conversational instructions. It is designed as a lightweight, fast CLI with minimal overhead, making it suitable for integrating AI assistance directly into existing toolchains. Developers should care because it offers open-source, locally-controllable AI coding support without depending on heavyweight IDE integrations.[11]