Claude Code

What is Claude Code?

Claude Code is a command-line AI programming tool developed by Anthropic . It integrates the advanced Claude Opus 4 language model, enabling it to understand natural language commands, automatically generate, modify, and debug code, and deeply integrate with mainstream IDEs such as VS Code and JetBrains. Claude Code supports 200K long contexts, allowing for rapid indexing of the entire codebase and understanding of complex dependencies. It features file operations, code search, web browsing, and Git workflow management, significantly improving development efficiency. Claude Code helps developers quickly generate high-quality code, executing commands directly within the development environment, avoiding frequent interface switching and greatly optimizing the development process. The latest version introduces an automatic security review function, capturing vulnerabilities before they are released. Claude Code’s new Opus planning mode supports efficient and intelligent development planning. Users can leverage the powerful analytical capabilities of the Opus 4.1 model to create high-quality development plans in complex projects, switching to the Sonnet model during the execution phase for efficient and low-cost code generation.

Claude Code’s main functions

• Deep codebase understanding : Based on intelligent search technology, quickly understand the structure and dependencies of the entire codebase without manually selecting context files.
• Collaborative modification across multiple files : Enables coordinated and consistent code modifications across multiple files, ensuring the integrity and consistency of code logic.
• Code generation and optimization : Specifically optimized for code understanding and generation, it can quickly generate high-quality code snippets, test cases, and fix code issues.
• Terminal integration : Runs directly in the developer’s terminal without switching tools, reducing the hassle of context switching.
• Integration with mainstream IDEs : Supports mainstream development tools such as VS Code and JetBrains, providing code suggestions and modifications directly within the IDE, seamlessly integrating into existing development workflows.
• Workflow integration : Integrates with tools such as GitHub and GitLab, supporting the entire workflow from reading issues, writing code, running tests to submitting PRs.
• Intelligent editing : Based on an understanding of the codebase and dependencies, it enables powerful multi-file editing, ensuring the effectiveness and reliability of code modifications.
• User control and customization : Files will not be modified without explicit approval, adapting to the developer’s coding standards and patterns, and can be customized via SDK or GitHub Actions.
• Terminal-run /security-reviewcommand : Users can enter this command in the terminal, and Claude Code will automatically check for security risks such as SQL injection and XSS in the code, and can directly fix the discovered vulnerabilities.
• GitHub Actions Integration : After configuring the relevant files in the GitHub repository, a security review is automatically triggered every time a new PR is submitted. If a vulnerability is detected, an inline comment is added to the code line to explain the problem and provide a fix suggestion.
• Opus Planning Mode : During the planning phase, the powerful Claude 4.1 Opus model is invoked to formulate a high-quality development plan, and the efficient and low-cost Claude 4 Sonnet model is used when executing tasks, achieving a combination of intelligence and efficiency.
• Agent View : Allows developers to schedule, monitor and manage multiple parallel AI sessions simultaneously within a single terminal interface, without needing to open multiple windows. It enables real-time viewing of task status and quick switching between interventions or unblocking.
• Artifacts : Supports the real-time generation of AI workflows into shareable, interactive web pages, facilitating synchronized viewing and collaboration within the team.

How to use Claude Code

• Install Node.js : Ensure that Node.js version 18 or later is installed on your system.
• Install CLI : Run the following command in the terminal to install the Claude Code command-line tools:

• Login and initialization :
  • Log in : Run the application claude loginand follow the prompts to enter your API key (obtained from the Anthropic website).
  • Initialization : Run claude init, connect to the code repository.
• Getting Started :
  • Generate code : Describe the requirements in English, for example:

• • Fix the error : Describe the error or paste the error message, for example:

• • Automating tasks : Running commands to solve tedious tasks, such as:

• Integration into the development environment :
  • Terminal : Used directly in the terminal.
  • IDE : Install the VS Code or JetBrains plugin to use it in the IDE.