Claude Code is Anthropic’s agentic coding tool delivered as a command-line interface. Unlike editor plugins, it runs in the developer’s terminal and acts as a full agent: reading and writing files, executing shell commands, running tests, committing to git, and driving a browser — all in the developer’s own machine environment.
Key capabilities
Terminal-native — Claude Code runs as claude in any shell. The developer describes a task; Claude plans and executes it using the tools available in the terminal context.
File system and shell access — The agent has explicit permission to read, create, edit, and delete files within the project, and to run arbitrary shell commands (npm, git, test runners, build tools). This makes it suitable for full implementation tasks, not just suggestions.
MCP support — Claude Code can connect to Model Context Protocol servers, extending its capabilities with database connectors, browser automation, and custom tooling.
Multi-agent orchestration — Claude Code can spawn sub-agents to work in parallel branches, coordinate handoffs through structured result blocks, and drive an autonomous loop (Developer -> QA -> merge) with minimal human intervention.
Git integration — Creates branches, writes commits with meaningful messages, opens pull requests, and handles merge conflicts.
Autonomy level
Level 3 (supervised agent): the developer approves tool calls in interactive mode. In --dangerously-skip-permissions or headless mode the agent runs unattended, raising the effective autonomy to 4 or 5 depending on scope.
Strengths
- Works inside the developer’s existing terminal and project — no IDE switch
- Full MCP ecosystem for extending capabilities
- Multi-agent patterns enable parallel workstreams
- Strong coding benchmark results (SWE-bench)
Limitations
- Terminal-only; no visual editor experience
- Anthropic models only (no model flexibility)
- Unattended mode requires careful permission scoping