Claude Code is an agentic coding assistant that embeds directly into terminals and IDEs to understand, explain, and modify large codebases. It uses agentic search to automatically map project structure and dependencies in seconds, surfacing relevant files and context without manual navigation. From explaining complex modules to executing routine tasks and implementing changes, Claude Code helps developers work faster by producing targeted edits, generating tests, and suggesting refactors while integrating with developer workflows via CLI and editor extensions. Its value lies in accelerating comprehension and repetitive coding work across million-line projects while preserving developer control over architecture and security decisions.