How is Claude Code different from GitHub Copilot?
Claude Code is an agentic coding tool that can autonomously complete multi-step tasks, edit multiple files, run shell commands, execute tests, and manage git workflows. GitHub Copilot focuses primarily on inline code completion and suggestions. Claude Code understands entire codebases contextually and can handle complex tasks like refactoring across multiple files, debugging production issues, or implementing entire features from a single prompt.
What can Claude Code do autonomously?
Claude Code can: read and edit files across your codebase, run shell commands and scripts, execute and fix failing tests, debug errors by analyzing logs and stack traces, create commits with proper messages, browse documentation and web pages, interact with GitHub (create PRs, review code), manage dependencies, refactor code across multiple files, and even deploy applications. It asks permission before taking potentially destructive actions.
How much does Claude Code cost?
Claude Code is available through Claude Pro ($20/month with usage limits), Claude Max ($100/month for 5x Pro usage or $200/month for 20x usage), or via API credits (pay-per-use based on tokens). The API option is cost-effective for heavy users. Enterprise plans with custom pricing are also available for teams.
Which IDEs and editors support Claude Code?
Claude Code works natively in any terminal and has official extensions for VS Code and JetBrains IDEs (IntelliJ, WebStorm, PyCharm, etc.). It also integrates with Vim/Neovim via terminal, Slack for team collaboration, and can be used in any environment that supports command-line tools. The VS Code extension provides inline diff previews and seamless integration.
What are MCP servers and how do they extend Claude Code?
MCP (Model Context Protocol) servers are plugins that extend Claude Code capabilities. You can add servers for databases (PostgreSQL, MySQL), cloud services (AWS, GCP), APIs (GitHub, Jira, Slack), file systems, and custom tools. Configure them in ~/.claude/settings.json. Popular MCP servers include database connectors, Puppeteer for browser automation, and memory systems for persistent context.
How do I install and set up Claude Code?
Install via npm: npm install -g @anthropic-ai/claude-code, or download directly from anthropic.com. Run claude in your terminal to start. On first run, authenticate with your Anthropic account. For VS Code, install the Claude Code extension from the marketplace. Configure custom instructions in ~/.claude/CLAUDE.md for project-specific context.
Is Claude Code safe to use? What permissions does it need?
Claude Code runs in a sandboxed environment and asks permission before executing potentially dangerous commands (rm, git push --force, etc.). You can configure allowed/denied commands in settings. It never sends code to third parties beyond Anthropic. For sensitive projects, use the --dangerously-skip-permissions flag carefully or configure granular permissions per command type.
Can Claude Code work with large codebases?
Yes, Claude Code efficiently handles large codebases through intelligent file indexing and context management. It uses glob patterns and grep to find relevant files, summarizes context when needed, and maintains conversation history. For very large repos, it automatically manages context windows and can work with millions of lines of code.
How do hooks work in Claude Code?
Hooks let you run custom scripts at specific points in Claude Code workflow. Pre-command hooks run before tool execution, post-command hooks run after. Configure in settings.json with patterns like {"hooks": {"pre-commit": "npm test", "post-edit": "prettier --write"}}. Useful for enforcing linting, running tests, or custom validation.
What is the CLAUDE.md file?
CLAUDE.md is a project-specific instruction file placed in your repository root. Claude Code reads it automatically to understand project conventions, tech stack, coding standards, and special requirements. Include build commands, testing instructions, architecture overview, and any rules Claude should follow. Supports markdown formatting.
Can Claude Code create git commits and pull requests?
Yes, Claude Code can stage changes, create commits with descriptive messages, push branches, and create pull requests via GitHub CLI. It follows conventional commit formats and can be configured to match your team commit style. Use /commit command or ask it to commit changes naturally. It adds Co-Authored-By attribution.
How does Claude Code compare to Cursor, Cline, and Aider?
Claude Code is Anthropic official CLI tool with deep Claude integration. Cursor is an IDE fork with AI features built-in. Cline (formerly Claude Dev) is a VS Code extension. Aider is an open-source terminal tool. Claude Code offers the most direct access to Claude capabilities, native terminal experience, and official support with regular updates.
What programming languages does Claude Code support?
Claude Code supports all major programming languages including JavaScript/TypeScript, Python, Java, C/C++, Go, Rust, Ruby, PHP, Swift, Kotlin, and more. It understands frameworks like React, Vue, Django, Rails, Spring, and can work with infrastructure code (Terraform, Docker, Kubernetes). Language detection is automatic.
Can I use Claude Code offline or with local models?
Claude Code requires internet connection as it uses Anthropic Claude API. However, you can configure it to use alternative API endpoints if you have self-hosted Claude access. For fully offline use, consider open-source alternatives like Aider with local Ollama models, though capabilities will be reduced.
What are slash commands in Claude Code?
Slash commands are shortcuts for common actions: /help (show commands), /clear (reset context), /compact (summarize conversation), /config (edit settings), /commit (create git commit), /review (code review), /bug (debug mode), /init (initialize CLAUDE.md). Type / to see all available commands.