CODEX
Local AI coding agent from OpenAI
ABOUT
Traditional AI coding assistants work inside an IDE and help with individual edits, but they break down on multi-file refactors, complex bug fixes, and end-to-end feature implementation that requires understanding the full codebase, running tests, and iterating on feedback. Codex solves this as a standalone terminal agent that indexes your entire repository, understands your build system and dependency graph, and autonomously plans, implements, and verifies changes across multiple files. It runs locally, uses your existing terminal environment, and can execute commands, interpret error output, and self-correct. For developers working on complex features or unfamiliar codebases, this transforms the coding workflow from "write every line" to "review and approve well-tested patches."
npm install -g @openai/codex