presonus-studiolive-mcp: Instructions file for GitHub Copilot

Phase 04: Detailed Design

Standards: IEEE 1016-2009 (Software Design Descriptions)
XP Integration: Simple Design, CRC Cards, Design Patterns
DDD Integration: Entity, Value Object, Aggregate, Repository, Factory, Domain Service, Specification

🎯 Phase Objectives

1. Transform architecture into detailed component designs using DDD tactical patterns
2. Define class structures, interfaces, and algorithms with Design by Contract
3. Specify data models and database schemas respecting domain model
4. Document design patterns and implementation approaches
5. Create design specifications enabling implementation

📋 Design Documentation Approach

⭐ PRIMARY: Link to Architecture Issues (GitHub Issues)

Design artifacts reference architecture issues created in Phase 03. Detailed designs can be:

• GitHub Issue comments on architecture component issues (ARC-C)
• Wiki pages linked from architecture issues
• Markdown files in 04-design/ with issue references

Linking Design to Architecture Issues

Every design specification MUST reference:

• Architecture Component Issue: #N (from ARC-C templates)
• Architecture Decisions: #N (from ADR templates)
• Requirements: #N (from REQ-F/REQ-NF templates)

Example Design File Header:

# User Authentication Service - Detailed Design

**Architecture Component**: #79 (ARC-C-AUTH: User Authentication Service)
**Architecture Decisions**:
- #78 (ADR-SECU-001: JWT Authentication)
- #80 (ADR-DATA-001: PostgreSQL for User Data)

**Requirements**:
- #45 (REQ-F-AUTH-001: User Login)
- #46 (REQ-NF-SECU-002: Session Security)

---

## Class Diagram
## Sequence Diagrams
## Data Models

Comment on Architecture Issues

Add detailed design as comment on architecture component issue:

Comment on Issue #79 (ARC-C-AUTH):

## Detailed Design

### Class Structure
\`\`\`typescript
class UserService {
  constructor(
    private userRepository: IUserRepository,
    private jwtService: IJwtService,
    private passwordHasher: IPasswordHasher
  ) {}

  async login(credentials: Credentials): Promise<AuthResult> {
    // Implementation details
  }
}
\`\`\`

### Sequence Diagram
[Mermaid diagram or link to diagram]

### Data Model
[Tables, schemas, relationships]

### Design Patterns
- Repository Pattern for data access
- Dependency Injection for testability
- Strategy Pattern for password hashing algorithms