Create Architecture Documentation

# Create Architecture Documentation

Generate comprehensive architecture documentation for the project following industry-standard documentation frameworks (C4 Model, Arc42).

## Documentation Scope

### 1. System Overview

**Context Diagram** (C4 Level 1)
- System boundaries
- External users and systems
- Key interactions and data flows
- Technologies and protocols used

**System Purpose**
- Primary business objectives
- Key capabilities and features
- Target users and stakeholders
- Success criteria

### 2. Architecture Containers (C4 Level 2)

Document the high-level architecture including:
- Frontend applications
- Backend services
- Databases
- External services
- Message queues
- Cache layers

For each container, specify:
- Technology stack
- Responsibilities
- Communication protocols
- Data formats

### 3. Component Architecture (C4 Level 3)

Break down each container into components:
- Component responsibilities
- Internal structure
- Component interactions
- Design patterns used

### 4. Key Design Decisions

Document Architectural Decision Records (ADRs) for:
- Technology choices
- Architectural patterns (MVC, Microservices, Event-Driven, etc.)
- Data storage decisions
- Communication patterns
- Security approach
- Scalability strategy

**ADR Format:**
- **Decision**: What was decided
- **Context**: Situation and constraints
- **Consequences**: Positive and negative impacts
- **Alternatives Considered**: Other options evaluated
- **Status**: Accepted, Deprecated, Superseded

### 5. Technical Specifications

**Data Models**
- Entity relationships
- Database schemas
- Data flow diagrams
- Data validation rules

**API Specifications**
- Endpoint definitions
- Request/response formats
- Authentication/authorization
- Error handling
- Rate limiting

**Security Architecture**
- Authentication mechanisms
- Authorization model
- Data encryption (at rest and in transit)
- Security boundaries
- Compliance requirements

**Scalability & Performance**
- Load handling strategy
- Caching strategy
- Database optimization
- Horizontal/vertical scaling approach
- Performance benchmarks

### 6. Deployment Architecture

- Infrastructure diagram
- Environment setup (dev, staging, production)
- CI/CD pipeline
- Monitoring and logging strategy
- Disaster recovery plan

### 7. Integration Points

- External service integrations
- Third-party APIs
- Webhook endpoints
- Message queue topics
- Event schemas

## Diagram Guidelines

Use Mermaid syntax for diagrams:

**System Context Diagram Example:**
```mermaid
graph TB
    User[User]-->System[Our System]
    System-->Database[(Database)]
    System-->ExternalAPI[External API]

Component Diagram Example:

graph LR
    UI[User Interface]-->API[API Layer]
    API-->Service[Business Logic]
    Service-->Data[Data Layer]
    Data-->DB[(Database)]

Sequence Diagram Example:

sequenceDiagram
    User->>API: Request
    API->>Service: Process
    Service->>Database: Query
    Database->>Service: Data
    Service->>API: Response
    API->>User: Result

Output Format

Create a comprehensive architecture document with:

1. Executive Summary (1-2 paragraphs)
2. System Context with diagrams
3. Architecture Overview with container and component diagrams
4. Key Design Decisions (ADRs)
5. Technical Specifications organized by area
6. Deployment and Infrastructure
7. Security and Compliance
8. Appendix with glossary and references

Best Practices

• Use consistent terminology throughout
• Include visual diagrams for complex concepts
• Link to code examples when helpful
• Keep documentation up-to-date with code
• Use standard notation (UML, C4, ArchiMate)
• Focus on “why” not just “what”
• Document trade-offs and constraints
• Make it accessible to different audiences (developers, architects, management)