Claude Code

Claude Code is Anthropic’s official command-line AI coding tool. It lets you interact with your codebase using natural language — generating code, refactoring, debugging, and creating commits.

Installation & Setup

Install Node.js

Make sure you have Node.js 18+ installed:

node -v

Install Claude Code

npm install -g @anthropic-ai/claude-code

Set Environment Variables

Mac / Linux (zsh)

echo 'export ANTHROPIC_API_KEY="sk-your-api-key"' >> ~/.zshrc
echo 'export ANTHROPIC_BASE_URL="https://api.ephone.ai/anthropic"' >> ~/.zshrc
source ~/.zshrc

Mac / Linux (bash)

echo 'export ANTHROPIC_API_KEY="sk-your-api-key"' >> ~/.bashrc
echo 'export ANTHROPIC_BASE_URL="https://api.ephone.ai/anthropic"' >> ~/.bashrc
source ~/.bashrc

Windows (PowerShell)

[Environment]::SetEnvironmentVariable("ANTHROPIC_API_KEY", "sk-your-api-key", "User")
[Environment]::SetEnvironmentVariable("ANTHROPIC_BASE_URL", "https://api.ephone.ai/anthropic", "User")

Navigate to Your Project and Start

cd your-project-folder
claude

Common Commands

Command	Description
`claude`	Start interactive mode
`claude "task description"`	Run a one-off task
`claude commit`	Auto-generate a Git commit message and commit
`/help`	Show all available commands
`/clear`	Clear the current conversation history
`/model`	Switch the model being used

Recommended Models

Use Case	Recommended Model
Everyday coding assistance	`claude-opus-4-5-20251101`
Complex refactoring	`claude-opus-4-5-20251101-thinking`

Advanced Usage

Define project rules with CLAUDE.md Create a CLAUDE.md file in your project root — Claude Code will automatically read and follow its instructions:

# Project Rules
- Use TypeScript, no `any` types
- Follow Conventional Commits for commit messages
- Run npm test after every change

Extend with MCP Servers Claude Code supports MCP (Model Context Protocol) to connect external tools like databases, file systems, and browsers, significantly extending its Agent capabilities.

Claude Code’s Agent mode calls the model frequently. Token usage is much higher than regular chat — we recommend using a Tier 2 account to avoid hitting rate limits.

Development Tools & Platforms

Translation Tools

Integration Applications

Installation & Setup

Common Commands

Recommended Models

Advanced Usage

​Installation & Setup

​Common Commands

​Recommended Models

​Advanced Usage

Installation & Setup

Common Commands

Recommended Models

Advanced Usage