Claude Code

Claude Code is an agentic coding product developed by Anthropic that operates as a command-line interface tool. Unlike traditional code completion tools that suggest snippets, Claude Code can autonomously navigate codebases, read and write files, run terminal commands, execute tests, and perform multi-step software engineering tasks while keeping the developer in the loop for approval of significant actions.

The tool is powered by Claude models and can handle complex workflows such as refactoring across multiple files, debugging failing tests, implementing features from natural language descriptions, and managing git operations. Anthropic has disclosed that Claude Code writes roughly 80% of its own codebase, using it as both a product and a production workflow internally. Features like Remote Control allow developers to start a session on their machine and continue directing it from their phone.

Claude Code has expanded beyond pure coding into adjacent capabilities. Claude Code Security scans codebases for vulnerabilities with adversarial verification and proposed patches. The tool supports MCP for connecting to external data sources and services. Its combination of terminal-level access, codebase understanding, and agentic autonomy positions it as a developer infrastructure layer rather than just an autocomplete tool, which is why its feature expansions have directly impacted products and companies building in overlapping categories.