What is Claude Code

Definition:

Claude Code is an AI-assisted programming tool developed by Anthropic. It uses Claude models to examine software projects, modify files and run commands or tests based on natural language instructions.

It goes beyond suggesting code snippets: it can carry out a sequence of actions on a project, check the results and decide what to do next, within the available tools and permissions.

How Claude Code works

Claude Code combines the capabilities of a language model with tools for working in a development environment. Given a request, it can find relevant files, read the code and make related changes across them.

For example, fixing a bug may require reviewing a function, checking where it is used and updating a test. The tool can work through these steps and use the results of its checks to continue investigating.

Project context also matters. Team instructions, documentation and coding conventions help guide modifications. This does not mean that Claude Code automatically knows every file or correctly interprets all the relationships between them.

What Claude Code is used for

It can support a range of software development and maintenance tasks. Its uses include the following:

• Understanding a project: locating functions, explaining how files relate to each other and tracing the path of an operation.
• Fixing bugs: investigating unexpected behaviour, proposing a solution and checking it.
• Developing features: modifying the components needed to introduce a change.
• Refactoring code: reorganising its structure while aiming to preserve existing behaviour.
• Preparing tests: creating automated checks and running those already available.
• Maintaining documentation: explaining components or updating instructions when the project changes.

It can also work with Git, the version control system, to review differences and prepare changes that other people can evaluate before incorporating them.

Modifying the project is not the same as publishing the change on the website; deployment is a separate operation.

Working environment and integrations

Claude Code can be used from the terminal and through interfaces integrated into editors, desktop applications or web environments. The access options for Claude Code make it possible to work with the tool without being limited to a single interface.

Its access to additional information depends on the configured integrations. It can connect to external tools to consult documentation or work with other systems, always within the available scope.

Having an interface installed on a computer does not mean that the model runs locally or that all information stays on that machine. It is important to distinguish where the files are stored, where commands run and what data is sent to the AI service.

Permissions and reviewing changes

Reading a file, modifying it and running a command are different actions. Permissions and the working mode determine which actions Claude Code can perform and when it needs confirmation.

The tool may misinterpret a request, introduce a bug or modify more elements than necessary. Passing the available tests does not prove that every case has been covered.

It is therefore useful to define the task’s scope, preserve changes through version control and review the differences before incorporating them. Access to credentials, confidential data and production systems should match the actual needs of the work.

The difference between Claude Code and Claude

Claude is the name of Anthropic’s family of models and its general-purpose assistant. Claude Code is a specialised tool that uses those models to work on software projects.

Both can help with programming. The main difference lies in the environment and tools: Claude Code is designed to navigate files, apply modifications and run checks as part of a development task.

Claude Code is neither a separate model nor a superior version of Claude. It is a way of using its capabilities within a specialised workflow.