What it is
OpenAI Codex in this repository is a local coding agent that runs on the developer’s computer. It is not just a model and not only a cloud chat: the tool works next to a working copy, reads files, proposes changes, and runs commands.
The repository matters as the open part of Codex CLI. The documentation distinguishes terminal Codex, IDE integration, the desktop app, and cloud-based Codex Web because the Codex name covers several ways to work with an agent.
What is inside and how people use it
Inside are the CLI, documentation, install scripts, releases, and build material. It can be installed through an install script, npm, Homebrew cask, or GitHub Release binaries.
Install and run
This example shows the basic documented path: install the CLI and start the agent in a project.
curl -fsSL https://chatgpt.com/codex/install.sh | sh
# или через npm
npm install -g @openai/codex
codexA typical use case is opening a repository, running `codex`, describing the task, and letting the agent read or change files within the project. Verification through tests, linting, and builds is a core part of the process.
Strengths and limitations
The strength is closeness to the real working environment. The agent sees the project not as a pasted snippet, but as a filesystem, commands, and change history.
The limitation is permissions and trust. Codex can edit files and run commands, so task scope, secrets, destructive operations, and actually completed checks all need attention.