Agentic coding tool from Anthropic that operates directly in the terminal, enabling developers to delegate complex software engineering tasks — editing files, fixing bugs, refactoring codebases, writing tests, and managing git workflows — using natural language commands powered by Claude.
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Key Features
- Terminal-native interface with full codebase context
- Multi-file editing, refactoring, and code generation
- Automated test writing and bug fixing
- Git workflow management (commits, PRs, merge conflict resolution)
- Agentic loops that plan, execute, and iterate autonomously
- Tool use including bash commands, file operations, and web search
- Context-aware across entire project directories
- Supports Claude 3.5 Sonnet, Claude 3.5 Haiku, and Opus models
- Extended thinking mode for complex reasoning tasks
- Custom slash commands and project-specific instructions via CLAUDE.md
Background
- Built and maintained by Anthropic.
- Launched in early 2025 as a developer preview, rapidly adopted by engineering teams.
- Designed as a complement to Claude in the browser and API, focused on developer workflows.
- Priced via Anthropic API usage (token-based) or included with Claude Pro/Team/Enterprise subscriptions.
- Open-source CLI client available on GitHub.