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Claude Code

What is Claude Code? Anthropic's agentic coding tool that operates directly in your terminal.

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Claude Code — AI Glossary

Claude Code is Anthropic's agentic coding assistant that runs directly in your terminal. It connects to your codebase, reads project context, and executes multi-step software engineering tasks — writing code, running tests, managing git workflows, and editing files across your project. Unlike IDE-embedded copilots, Claude Code operates as an autonomous agent with full shell access, powered by Claude models.

Why Claude Code Matters

Claude Code shifts AI-assisted development from line-level autocomplete to full task execution. You describe what you want — fix a bug, refactor a module, add a feature — and it plans the approach, makes edits across multiple files, runs your test suite, and commits the result.

The tool integrates with your existing workflow rather than requiring a new IDE. It reads CLAUDE.md project files for repo-specific instructions and supports SKILL.md files that encode reusable engineering standards. Teams get consistent AI behavior without repeating prompts. Anthropic has continued expanding its capabilities, including memory features and desktop agent integrations.

How Claude Code Works

Claude Code uses Anthropic's Claude model with extended context windows and tool-use capabilities. It reads your project structure, understands file relationships, and executes commands through a sandboxed shell.

Key mechanisms:

  • Project context: Reads CLAUDE.md for project-level instructions and constraints
  • MCP servers: Connects to external tools and data sources via the Model Context Protocol
  • Sub-agents: Spawns parallel agents for large-scale tasks like codebase exploration or multi-file refactors
  • Git integration: Stages, commits, and creates pull requests with structured messages
  • Permission modes: Configurable approval levels from fully interactive to autonomous execution
  • Claude: Anthropic's family of large language models that power Claude Code's reasoning and code generation
  • CLAUDE.md: Project-level configuration file providing repository context, conventions, and constraints to Claude Code
  • MCP Server: External tool integrations that extend Claude Code's capabilities beyond the terminal via the Model Context Protocol

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