Basic Usage

This guide covers essential daily operations with Claude Code.

Starting and Stopping

# Start interactive mode
claude

# Run a one-off task
claude "fix the build error"

# Run a query and exit
claude -p "explain this function"

# Continue recent conversation
claude -c

Common Operations

Reading Code

> Explain this file
> What does the authenticate function do?
> Show me how errors are handled

Writing Code

> Add input validation to the form
> Create a new API endpoint for users
> Implement the feature described in issue #123

Debugging

> Why is this test failing?
> Find the bug causing the login error
> Analyze this error message: [paste error]

Refactoring

> Refactor this to use async/await
> Extract common logic into a utility function
> Simplify this complex condition

Working with Files

Claude can:

• Read any file in your project
• Create new files
• Edit existing files
• Delete files (with confirmation)

All modifications require your approval.

Slash Commands

Keyboard Shortcuts

Best Practices

1. Start with exploration: Let Claude understand your codebase first
2. Use /clear between tasks: Keep context focused
3. Review changes carefully: Always verify before approving
4. Use specific descriptions: More detail = better results