Claude Code is Anthropic's agentic coding tool that works directly in your terminal, IDE, desktop app, or browser — it reads and understands your entire codebase, then builds features, fixes bugs, and automates dev tasks from plain-English descriptions.
It can take real actions (editing files, running commands, making commits), integrates with external tools like document storage, project-tracking, and design software via MCP, and is scriptable enough to fit into CI pipelines and Unix-style workflows.