Save and recover projects with Git and GitHub

Working on a project means revising it: trying a new layout, adding a feature, or changing how something works. Any revision can break something or turn out worse than what you had. Keeping earlier versions lets you compare ideas and get back work you want. They also show what changed when several people or AI agents work on the same project.

Git is a version control system: a tool that records the versions of your project files you choose to save. GitHub is a website that hosts Git projects online, so you and people you give access can retrieve and share that recorded work. You do not have to type Git commands yourself. An AI agent, an assistant such as Claude Code or Codex that uses tools to work on your files, can run them with your permission while you decide which changes to save, share, or undo.