Installation

Requirements

• Node.js: 20.0.0 or higher
• Claude Code: Latest version recommended

Install with npm

npm install -g sdd-tool

Install with pnpm

pnpm add -g sdd-tool

Verify Installation

sdd --version

Claude Code Setup

SDD Tool collaborates with AI through Claude Code slash commands.

Install Claude Code

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

Start Claude Code in Your Project

claude

Initialize Project

In a new project:

cd your-project
sdd init

Structure created after initialization:

your-project/
├── .sdd/
│   ├── constitution.md     # Project constitution
│   ├── AGENTS.md           # AI workflow guide
│   └── specs/              # Feature specs
└── .claude/
    ├── commands/           # Slash commands (32 total)
    └── skills/             # 6 dev-* skills + 32 sdd-* Skills 2.0

Update

npm update -g sdd-tool

Troubleshooting

Permission Error

sudo npm install -g sdd-tool

Or change npm global install path to user directory:

npm config set prefix ~/.npm-global
export PATH=~/.npm-global/bin:$PATH

Node.js Version Error

Node.js 20 or higher is required. When using nvm:

nvm install 20
nvm use 20