| name | spec-feature |
| description | Creates and maintains domain specifications following the SDD approach. Use this skill when specs need to be written, features derived, or domain requirements documented. Pure domain language — no technical details like frameworks, HTTP methods, or data types. |
Spec-Feature Skill
Purpose
Create domain specifications in pure business language. Specifications describe what the system should do, never how it is technically implemented.
Rules
Strict Separation
- IN the Spec: Domain requirements, business rules, actors, processes, domain terms
- NOT in the Spec: Framework names, HTTP methods, data types, queue names, database schemas, package structures
Structure of a Domain Spec
# Feature: [Feature Name]
## Context
[Why is this feature needed?]
## Actors
[Who interacts with the feature?]
## Domain Requirements
[What should the system be able to do?]
## Business Rules
[What rules apply?]
## Acceptance Criteria
[When is the feature complete?]
Anti-Patterns (FORBIDDEN in Specs)
- ❌ "The REST endpoint returns..."
- ❌ "The entity has the following fields: String name, Long id..."
- ❌ "Via RabbitMQ message..."
- ❌ "The Quarkus extension..."
Correct Domain Formulations
- ✅ "The system allows the user to..."
- ✅ "Upon receiving a request, the system validates..."
- ✅ "The requester receives a confirmation..."
Workflow
- Analyze the user's requirement
- Identify actors and business processes
- Formulate purely domain-level requirements
- Define business rules and acceptance criteria
- Create the spec file under
specs/ in the project
