Claude Code is an AI coding agent from Anthropic. You can hand it tasks such as fixing a bug, writing tests or running a longer migration, and it reads your codebase, edits files and runs commands while you steer and review.
It works from the terminal, IDEs like VS Code and JetBrains, the web, Slack, GitHub and mobile apps, on macOS, Linux and Windows. It is included in Claude Pro and Max plans, so it is a paid tool for developers who want an agent handling real engineering work.