Codex is the software specialist next to Work. You give it a goal, like fixing a bug or adding a feature, and it reads the real files, edits them, runs commands and tests, and reports back. Every change shows as a diff you review before you keep it.
You use it in the Codex view of the desktop app, in a terminal with the Codex CLI, in your code editor, or in Codex Cloud, where tasks keep running while your laptop sleeps. A permission mode decides how far it may go alone, and an AGENTS.md file gives it your project's rules.