Claude Code

What is Claude Code?

Claude Code is a command line-based AI programming tool launched by Anthropic. Claude Code integrates the advanced Claude Opus 4 language model, which can understand natural language instructions, automatically generate, modify and debug code, and is deeply integrated with mainstream IDEs such as VS Code and JetBrains. Claude Code supports 200K ultra-long contexts and can quickly index the entire code base and understand complex dependencies. Claude Code has functions such as file operations, code search, web browsing, and Git workflow management, which significantly improves development efficiency. Claude Code helps developers quickly generate high-quality code, execute commands directly in the development environment, avoid frequent interface switching, and greatly optimize the development process. The latest version introduces an automated security review feature to catch vulnerabilities before they are released. Claude Code's new feature Opus planning mode supports efficient and intelligent development planning. Users can use the powerful analysis capabilities of the Opus 4.1 model to formulate high-quality development plans in complex projects, and switch to the Sonnet model during the execution phase to achieve efficient and low-cost code generation.

Main functions of Claude Code

• Deep understanding of the code base: Based on intelligent search technology, quickly understand the structure and dependencies of the entire code base without manually selecting context files.
• Multi-file collaborative modification: Ability to perform coordinated code modifications across multiple files to ensure 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 problems in the code.
• Terminal integration: Run directly in the developer's terminal without switching tools, reducing the trouble of context switching.
• Integration with mainstream IDEs: Supports mainstream development tools such as VS Code and JetBrains, provides code suggestions and modifications directly in the IDE, and seamlessly integrates into the existing development process.
• Workflow integration: Integrate with GitHub, GitLab and other tools to support the entire process from reading issues, writing code, running tests to submitting PRs.
• Intelligent editing: Powerful multi-file editing based on the understanding of the code base and dependencies to ensure the effectiveness and reliability of code modifications.
• User control and customization: Files will not be modified without explicit approval, adapt to developer coding standards and patterns, and be custom configured via the SDK or GitHub Actions.
• The /security-review command run by the terminal: users can enter this command in the terminal. Claude Code will automatically check the code for SQL injection, XSS and other security risks, and can directly repair the discovered vulnerabilities.
• GitHub Actions integration: After configuring relevant files in the GitHub warehouse, every time a new PR is submitted, a security review is automatically triggered. After a vulnerability is detected, inline comments are added to the line of code to explain the problem and give repair suggestions.
• Opus Planning Mode: Call the powerful Claude 4.1 Opus model during the planning phase to formulate high-quality development plans, and use the efficient and low-cost Claude 4 Sonnet model when executing tasks to achieve a combination of intelligence and efficiency.
• Agent View: Allows developers to schedule, monitor and manage multiple parallel AI sessions at the same time in a terminal interface. No need to open multiple windows to view the status of each task in real time, quickly switch to intervene or unblock.
• Artifacts: Supports the real-time generation of AI work processes into shareable interactive web pages, making it easier for teams to view and collaborate simultaneously.

How to use Claude Code

• Install Node.js: Make sure your system has Node.js 18 or higher installed.
• Install CLI: Run the following command in the terminal to install Claude Code’s command line tool:

npm install -g @anthropic/claude-cli

• Login and initialization: Login: Run claude login and follow the prompts to enter the API key (obtained from Anthropic official website). Initialization: Run claude init to connect to the code base.
• Get started: Generate code: describe the requirements in English, for example:

claude -p "Create a function to calculate the sum of two numbers in Python"

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

claude -p "Fix this error: TypeError: Cannot read properties of null (reading 'length')"

• Automated tasks: Run commands to solve tedious tasks, such as:

claude -p "Resolve merge conflicts in the current branch"

• Integrated into development environment: Terminal: Use directly in the terminal. IDE: Install the VS Code or JetBrains plug-in to use it in the IDE.

Claude Code product pricing

• Pro plan: $17/month annually, $20/month monthly.
• Max 5x Plan: $100/person/month.
• Max 20x Plan: $200/person/month.

Application scenarios of Claude Code

• Code understanding: Quickly explain the functions and logic of complex codes to help developers quickly understand the project structure.
• Code modification: Automatically repair errors or vulnerabilities in the code, quickly locate problems and provide solutions.
• Code testing: Automatically generate unit tests or integration tests for the code to ensure the reliability and stability of the code.
• Version control: supports natural language to complete Git submission, branch management and other operations, simplifying the version control process and making Git operations more convenient and efficient.
• Function implementation and expansion: Quickly implement new functions or expand existing functions, accelerate development progress, and help developers complete tasks efficiently.