Spec-Driven Development (SDD)

This skill implements GitHub's SpecKit methodology for structured, AI-assisted software development. SpecKit transforms specifications into executable artifacts through a systematic, phase-based approach with built-in quality gates and multi-agent coordination.

Core Philosophy

"Specifications become executable, directly generating working implementations rather than just guiding them."

When to Use This Skill

• Starting new projects that require structured development
• Coordinating multiple AI agents or developers on complex features
• Ensuring consistent quality through constitutional governance
• Breaking down complex features into manageable, parallel work
• Preventing premature implementation before clear specifications
• Enterprise projects with strict governance requirements
• Teams needing real-time visibility across multiple features

The 7-Phase Workflow

Phase 0: Project Initialization

Purpose: Create project structure and configure development environment

Artifacts:

• .specify/ directory structure
• Git repository
• Automation scripts
• Templates

Key Actions:

• Set up directory structure
• Initialize version control
• Configure AI agent preferences
• Generate script variants (bash/powershell)

Phase 1: Constitution

Purpose: Establish project governance and development principles

Artifact: memory/constitution.md

Core Principles:

1. Library-First Principle: Every feature starts as a standalone library
2. CLI Interface Mandate: All libraries must have text-based interfaces
3. Test-First Imperative: Tests must precede implementation
4. Simplicity and Anti-Abstraction: Minimize complexity
5. Integration-First Testing: Prioritize realistic testing environments

Versioning: Semantic versioning (MAJOR.MINOR.PATCH)

• MAJOR: Backward-incompatible governance changes
• MINOR: New principles or material expansions
• PATCH: Minor clarifications or ref...