Sdd

Spec-Driven Development (SDD)

A structured workflow for creating feature specifications through three sequential commands. Each command produces a document in your project's specs/[slug]/ folder.

Commands

/sdd:init

Initializes SDD in the current project.

/sdd:requirement [slug] [description]

Defines what to build and why. Produces requirements.md with:

• Feature overview and alignment with product vision
• User stories with acceptance criteria
• Non-functional requirements

/sdd:design [slug] [focus]

Defines how to architect it. Produces design.md with:

• High-level architecture
• Components and interfaces
• Data models, error handling, testing strategy
• Performance, security, and observability considerations

/sdd:plan [slug] [focus]

Defines the steps to build it. Produces tasks.md with:

• Phases — testable increments with integration-level verification
• Tasks — unit-level steps within each phase

Usage

Run commands sequentially for a feature:

/sdd:init
/sdd:requirement auth-flow "Add OAuth2 login with Google and GitHub providers"
/sdd:design auth-flow "Focus on token refresh and session management"
/sdd:plan auth-flow "Start with Google provider, add GitHub in phase 2"

Install

Add the marketplace, then install:

/plugin marketplace add eschnou/claude-plugins
/plugin install sdd@eschnou-claude-plugins