Spec Kit

Overview

This skill guides the Spec-Driven Development (SDD) process using the GitHub Spec Kit. It helps you shift from code-first to specification-first development, ensuring high-quality software by focusing on product scenarios and predictable outcomes.

Workflow

The Spec Kit workflow consists of the following key stages. Follow them sequentially for new features or projects.

1. Initialize: Set up the project structure.
2. Constitution: Define project principles.
3. Specify: Create a functional specification.
4. Plan: Design the technical implementation.
5. Tasks: Break down the plan into actionable tasks.
6. Implement: Execute the tasks.

For detailed instructions on each step, see WORKFLOW.md.

Usage Guide

1. Initialization

• Goal: Bootstrap a new project.
• Action: Use uvx --from specify-cli specify init . --here --ai [MODEL].
• Git Check: Before execution, check if the directory is already a git repository (e.g., git rev-parse --is-inside-work-tree). Use the --no-git flag only if a git repository is already initialized to avoid conflicts.
• Check: Ensure specify-cli is accessible; uvx is preferred for consistency.

2. Principles (Constitution)

• Goal: Establish governing principles.
• Trigger: Respond to /speckit.constitution.
• Action: Create or update .specify/memory/constitution.md.
• Focus: Define core values like code quality, testing standards, and performance.

3. Specification

• Goal: Describe "what" and "why".
• Trigger: Respond to /speckit.specify.
• Action: Create specs/<feature>/spec.md using the template in .specify/templates/spec-template.md.
• Focus: User scenarios, outcomes, functional requirements. Avoid implementation details.

4. Planning

• Goal: Define "how".
• Trigger: Respond to /speckit.plan.
• Action: Create specs/<feature>/plan.md (and optional data-model.md, research.md).
• Focus: Architecture, tech stack, data structures, algorithms.

5. Tasks

• Goal: Create a checklist.
• Trigger: Respond to /speckit.tasks.
• Action: Create specs/<feature>/tasks.md based on the plan and specification.
• Focus: Small, verifiable steps grouped by user story.

6. Implementation

• Goal: Write code.
• Trigger: Respond to /speckit.implement.
• Action: Execute tasks from tasks.md sequentially.
• Behavior: Read the current task, implement, verify, and mark as completed.

Resources

• Workflow Details: WORKFLOW.md