spec-kit-specify

Create a feature specification from a natural language description.

Input: Feature description. If not provided, ask the user what they want to build.

Steps

1. Collect the feature description

   If input is missing or vague, ask:

   "What feature do you want to specify? Describe what it should do and why."

   Derive a kebab-case name (e.g., "add user authentication" → user-auth).

2. Create the change directory

   Create specs/changes/<name>/.

   specs/changes/ is gitignored. Only specs/features/ is canonical and versioned.

3. Write specs/changes/<name>/spec.md

   Structure:

   # Spec: <Feature Name>
    
   ## Problem
   <Why this feature is needed.>
    
   ## Goals
   <What success looks like, in measurable, technology-agnostic terms.>
    
   ## Non-Goals
   <What is explicitly out of scope.>
    
   ## User Stories
   - As a <role>, I want <goal> so that <benefit>. [P1/P2/P3]
    
   ## Success Criteria
   <Testable, technology-agnostic acceptance criteria.>
    
   ## Open Questions
   - [NEEDS CLARIFICATION] <question> — impact: <scope|security|ux|technical>

   Rules:

   • Focus on WHAT and WHY. Never describe HOW or name technologies.
   • Maximum 3 [NEEDS CLARIFICATION] markers, prioritised by scope > security > UX > technical.
   • Make informed, reasonable defaults for unspecified details.
   • Written for business stakeholders, not developers.
   • Align with FRAMEWORK.md governing principles.

4. Validate quality

   Before finishing, verify:

   • All success criteria are measurable and technology-agnostic.
   • No implementation details or framework names appear.
   • User stories have priorities.
   • Open questions are minimal and high-impact.

Output

After writing the spec, summarise:

• Change name and file location.
• Number of open questions (if any).
• Next step: "Use the spec-kit-clarify skill to resolve open questions, or the spec-kit-plan skill if the spec is clear."

Guardrails

• If a change with that name already exists, ask if the user wants to continue it or create a new one.
• Never include HOW — no tech stack, frameworks, or implementation details in the spec.
• Prefer making reasonable assumptions over asking unnecessary questions.