Claude Code: What It Is, How It Works and How to Get Started

Claude Code is an agentic coding tool developed by Anthropic that can understand a software codebase and help developers complete programming tasks using natural-language instructions. It can work from the terminal, integrate with development workflows and assist with tasks ranging from explaining existing code to editing files and handling Git operations.

Unlike a conventional chatbot that primarily returns code for users to copy manually, Claude Code can operate within a development environment and work directly with a project. This makes it useful for multi-file tasks where understanding the relationships between files matters.

What Is Claude Code?

Claude Code is Anthropic’s AI coding agent. Anthropic describes it as an agentic coding tool that lives in the terminal, understands a user’s codebase and can perform routine development tasks through natural-language commands.

The tool can be used from a terminal and supported IDE workflows. Anthropic also provides GitHub-related functionality, allowing Claude to participate in certain repository workflows.

The official project is available through the Claude Code GitHub repository.

What Can Claudes Code Do?

Claude Code is designed for more than generating isolated snippets.

Because it can work with a codebase, developers can ask it to investigate how a project works before requesting changes. Typical uses include understanding unfamiliar code, locating bugs, implementing features, modifying multiple related files and working with Git.

For example, instead of manually locating every file associated with an authentication feature, a developer can describe the required change and have Claude Code investigate the relevant parts of the project.

Anthropic’s official description specifically highlights three broad capabilities: executing routine coding tasks, explaining complex code and handling Git workflows.

The developer remains responsible for reviewing proposed changes, testing the application and deciding what should ultimately become part of the project.

How Does Claude Codex Work?

Claude Code operates as an agent rather than functioning solely as a question-and-answer interface.

After starting it inside a project directory, a developer can describe a task in ordinary language. Claude Code can inspect relevant project context, determine which files matter and use its available tools to work toward the requested result.

This approach is particularly useful for requests that involve several steps. A coding task might require finding the relevant component, understanding existing conventions, changing several files and then checking the result.

Because Claude Code can interact with a working development environment, users should still inspect commands and modifications before accepting consequential changes.

How to Install Claudes Code

Anthropic currently provides different installation methods depending on the operating system. Importantly, older tutorials may recommend installing Claude Code globally through npm, but the current official repository marks npm installation as deprecated.

For macOS and Linux, Anthropic currently recommends its native installer. Homebrew is also supported.

For Windows, the official repository lists a PowerShell installer and Windows Package Manager (WinGet) as installation options.

Users should check the official Claude Code repository for the current installation commands rather than relying on an older third-party tutorial.

After installation, navigate to the relevant project directory and run:

claude

This starts Claude Code within that project context.

Does Claude Code Understand an Entire Codebase?

One of Claude Code’s primary advantages over basic code-generation prompts is its ability to work with repository context.

Anthropic describes the tool as being able to understand a codebase. In practice, that allows developers to ask higher-level questions such as where a particular feature is implemented, how different components interact or what files need modification for a requested feature.

That does not mean every response or code change will automatically be correct. Large repositories can contain complicated dependencies, undocumented behavior and project-specific assumptions.

Developers should therefore treat generated modifications as code that requires review and testing rather than assuming AI-generated changes are automatically production-ready.

Claude Code and Git Workflows

Git integration is another prominent part of Claude Code.

Anthropic specifically lists Git workflows among the tasks the tool can handle. This can reduce some of the repetitive work involved in inspecting changes and managing development workflows.

Claude Code can also be used with GitHub-related workflows. Anthropic’s repository says developers can use the tool in a terminal or IDE, or tag Claude on GitHub.

Git remains valuable as a safety mechanism when working with an AI coding agent because developers can inspect diffs and preserve earlier versions before accepting substantial modifications.

Does Claudes Code Support Plugins?

Yes. Claude Code supports plugins that extend its capabilities.

Anthropic’s current repository includes plugins that can add custom commands and agents. The company maintains plugin-related resources within its Claude Code ecosystem.

This extension model allows teams to adapt Claude Code to workflows beyond its default configuration.

Anthropic continues to update the platform. For example, its September 2026 releases include changes involving project instructions, remote sessions, gateway configurations and other development features.

Because Claude Code changes frequently, current documentation is more reliable than older tutorials for specific features.

Is Claudes Code Open Source?

This question requires some qualification.

Anthropic maintains a public Claude Code repository on GitHub, where users can view repository files, releases, issues, documentation and licensing information.

However, having a public GitHub repository should not automatically be interpreted as meaning every component of the Claude Code service or the underlying Claude models is open source.

Users who need to understand exactly what they may modify, redistribute or incorporate into another product should consult the license included with the relevant repository rather than relying on the phrase “open source” alone.

Is Claude Code Safe to Use?

Claude Code can perform actions within a development environment, so security practices matter.

Anthropic maintains a security policy for the project and directs researchers to its vulnerability-reporting process.

Developers should still review commands before permitting consequential operations, inspect generated code, protect API keys and other secrets, use version control and test changes before deploying them.

Extra care is appropriate when an AI agent has access to production infrastructure, credentials, databases or sensitive source code.

Who Should Use Claude Codes?

Claude Code is primarily intended for people working with software projects.

Professional developers can use it to reduce repetitive coding work and investigate large repositories. New developers may find its code explanations helpful when learning unfamiliar projects, while teams can use agentic workflows to accelerate routine engineering tasks.

It is not necessary to delegate an entire project to Claude Code. It can also function as an assistant for narrowly defined tasks such as explaining a function, tracing a bug or implementing a contained change.

The amount of autonomy given to the agent should reflect the sensitivity and complexity of the project.

Claude Code FAQs

Who developed Claude Codes?

Claude Code is developed by Anthropic, the AI company behind the Claude family of models. Anthropic’s verified GitHub organization maintains the official Claude Code repository.

Is Claude Code a coding assistant?

Yes, although “agentic coding tool” is more precise. It can inspect a codebase and perform development tasks rather than merely answering programming questions.

Can Claude Code edit files?

Claude Code is designed to work directly with software projects and can make code changes as part of completing requested development tasks. Developers should review those modifications before relying on them in production.

Can Claude Codes work with Git?

Yes. Anthropic explicitly identifies Git workflows as one of Claude Code’s supported use cases.

Is npm still recommended for installing Claude Codse?

No. Anthropic’s current official repository labels npm installation as deprecated and recommends newer native installation methods.

Where can I get Claude Codes?

Installation instructions and project information are available through Anthropic’s official Claude Code GitHub repository. Users should prefer the current official instructions because installation methods and features can change over time.

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