# BMAD System Overview

This document provides a high-level overview of the BMAD system architecture, focusing on the major components and their interactions.

## System Context

\```mermaid title="BMAD System Context Diagram" type="diagram"
graph TB
    subgraph "External Systems"
        USERS[Users]
        IDE_SYS[IDE Systems]
        VCS[Version Control]
        PM_TOOLS[Project Management Tools]
        COMM[Communication Platforms]
    end
    
    subgraph "BMAD System"
        BMAD[BMAD Platform]
    end
    
    subgraph "Infrastructure"
        CLOUD[Cloud Services]
        DB[Databases]
        STORAGE[File Storage]
        MONITOR[Monitoring]
    end
    
    USERS --> BMAD
    IDE_SYS --> BMAD
    BMAD --> VCS
    BMAD --> PM_TOOLS
    BMAD --> COMM
    
    BMAD --> CLOUD
    BMAD --> DB
    BMAD --> STORAGE
    BMAD --> MONITOR
\```

## High-Level Architecture

\```mermaid title="BMAD High-Level Architecture" type="diagram"
graph TB
    subgraph "User Interfaces"
        WEB_UI[Web Interface]
        IDE_EXT[IDE Extensions]
        CLI_TOOL[CLI Tools]
        API_GW[API Gateway]
    end
    
    subgraph "Core Platform"
        ORCHESTRATOR[Orchestrator Engine]
        
        subgraph "Persona System"
            PM_PERSONA[PM Persona]
            ARCH_PERSONA[Architect Persona]
            UX_PERSONA[UX/UI Persona]
            DEV_PERSONA[Developer Persona]
            BA_PERSONA[Business Analyst]
        end
        
        subgraph "Processing Engines"
            TASK_ENGINE[Task Engine]
            TEMPLATE_ENGINE[Template Engine]
            VALIDATION_ENGINE[Validation Engine]
        end
    end
    
    subgraph "Data & Knowledge"
        KNOWLEDGE_BASE[Knowledge Base]
        TEMPLATES[Templates]
        CHECKLISTS[Checklists]
        CONFIG[Configuration]
    end
    
    subgraph "External Integrations"
        GIT_INT[Git Integration]
        JIRA_INT[Jira Integration]
        SLACK_INT[Slack Integration]
        AI_SERVICES[AI Services]
    end
    
    WEB_UI --> ORCHESTRATOR
    IDE_EXT --> ORCHESTRATOR
    CLI_TOOL --> ORCHESTRATOR
    API_GW --> ORCHESTRATOR
    
    ORCHESTRATOR --> PM_PERSONA
    ORCHESTRATOR --> ARCH_PERSONA
    ORCHESTRATOR --> UX_PERSONA
    ORCHESTRATOR --> DEV_PERSONA
    ORCHESTRATOR --> BA_PERSONA
    
    PM_PERSONA --> TASK_ENGINE
    ARCH_PERSONA --> TASK_ENGINE
    UX_PERSONA --> TASK_ENGINE
    DEV_PERSONA --> TASK_ENGINE
    BA_PERSONA --> TASK_ENGINE
    
    TASK_ENGINE --> TEMPLATE_ENGINE
    TEMPLATE_ENGINE --> VALIDATION_ENGINE
    
    VALIDATION_ENGINE --> KNOWLEDGE_BASE
    TEMPLATE_ENGINE --> TEMPLATES
    TASK_ENGINE --> CHECKLISTS
    ORCHESTRATOR --> CONFIG
    
    ORCHESTRATOR --> GIT_INT
    ORCHESTRATOR --> JIRA_INT
    ORCHESTRATOR --> SLACK_INT
    ORCHESTRATOR --> AI_SERVICES
\```

## Core Components

### 1. Orchestrator Engine
**Purpose**: Central coordination and decision-making hub

**Key Responsibilities:**
- Request analysis and routing
- Persona selection and coordination
- Context management and state tracking
- Quality assurance and validation
- Integration management

**Key Features:**
- Natural language processing
- Context-aware decision making
- Multi-persona coordination
- Real-time status tracking
- Automated quality gates

### 2. Persona System
**Purpose**: Specialized AI agents for different domains

**Available Personas:**
- **Project Manager (PM)**: Project planning and coordination
- **System Architect**: Technical architecture and design
- **UX/UI Designer**: User experience and interface design
- **Developer**: Code implementation and technical tasks
- **Business Analyst**: Requirements and process analysis

**Key Features:**
- Domain-specific expertise
- Consistent behavior patterns
- Template-driven outputs
- Context awareness
- Quality validation

### 3. Processing Engines

#### Task Engine
- Task decomposition and execution
- Dependency management
- Progress tracking
- Error handling and recovery

#### Template Engine
- Dynamic content generation
- Variable substitution
- Format standardization
- Multi-format output support

#### Validation Engine
- Quality assurance checks
- Compliance validation
- Completeness verification
- Best practice enforcement

### 4. Data & Knowledge Layer

#### Knowledge Base
- Project context and history
- Best practices and guidelines
- Domain-specific knowledge
- Learning and adaptation data

#### Templates
- Document templates
- Code templates
- Process templates
- Customizable formats

#### Checklists
- Quality assurance checklists
- Process validation checklists
- Compliance checklists
- Custom validation rules

## System Interactions

### 1. User Request Flow

\```mermaid title="User Request Processing Flow" type="diagram"
sequenceDiagram
    participant User
    participant Interface
    participant Orchestrator
    participant Persona
    participant Engine
    participant Data
    
    User->>Interface: Submit Request
    Interface->>Orchestrator: Parse & Route Request
    Orchestrator->>Orchestrator: Analyze Context
    Orchestrator->>Persona: Select & Activate
    Persona->>Engine: Execute Task
    Engine->>Data: Retrieve Templates/Data
    Data->>Engine: Return Resources
    Engine->>Persona: Generate Output
    Persona->>Orchestrator: Return Results
    Orchestrator->>Interface: Format Response
    Interface->>User: Deliver Results
\```

### 2. Multi-Persona Collaboration

\```mermaid title="Multi-Persona Collaboration Flow" type="diagram"
sequenceDiagram
    participant Orchestrator
    participant PM_Persona
    participant Arch_Persona
    participant UX_Persona
    participant Dev_Persona
    
    Orchestrator->>PM_Persona: Create Project Plan
    PM_Persona->>Orchestrator: Return Plan
    Orchestrator->>Arch_Persona: Design Architecture
    Arch_Persona->>Orchestrator: Return Architecture
    Orchestrator->>UX_Persona: Create UI Design
    UX_Persona->>Orchestrator: Return Design
    Orchestrator->>Dev_Persona: Implement Solution
    Dev_Persona->>Orchestrator: Return Implementation
    Orchestrator->>Orchestrator: Integrate Results
\```

## Deployment Architecture

### 1. Environment Types

**Development Environment:**
- Local development setup
- IDE integration focus
- Rapid iteration support
- Debug and testing tools

**Staging Environment:**
- Production-like configuration
- Integration testing
- Performance validation
- User acceptance testing

**Production Environment:**
- High availability setup
- Scalable infrastructure
- Monitoring and alerting
- Backup and recovery

### 2. Infrastructure Components

\```mermaid title="Infrastructure Architecture" type="diagram"
graph TB
    subgraph "Load Balancing"
        LB[Load Balancer]
        CDN[Content Delivery Network]
    end
    
    subgraph "Application Tier"
        APP1[App Server 1]
        APP2[App Server 2]
        APP3[App Server 3]
    end
    
    subgraph "Data Tier"
        DB_PRIMARY[Primary Database]
        DB_REPLICA[Read Replica]
        CACHE[Redis Cache]
        SEARCH[Elasticsearch]
    end
    
    subgraph "Storage"
        FILE_STORAGE[File Storage]
        BACKUP[Backup Storage]
    end
    
    subgraph "Monitoring"
        METRICS[Metrics Collection]
        LOGS[Log Aggregation]
        ALERTS[Alerting System]
    end
    
    LB --> APP1
    LB --> APP2
    LB --> APP3
    
    APP1 --> DB_PRIMARY
    APP2 --> DB_REPLICA
    APP3 --> CACHE
    
    APP1 --> SEARCH
    APP2 --> FILE_STORAGE
    
    DB_PRIMARY --> BACKUP
    FILE_STORAGE --> BACKUP
    
    APP1 --> METRICS
    APP2 --> LOGS
    APP3 --> ALERTS
\```

## Quality Attributes

### 1. Performance
- **Response Time**: Sub-second for simple operations
- **Throughput**: 10,000+ concurrent operations
- **Scalability**: Horizontal scaling capability
- **Resource Efficiency**: Optimized memory and CPU usage

### 2. Reliability
- **Availability**: 99.9% uptime target
- **Fault Tolerance**: Graceful degradation
- **Recovery**: Automated failure recovery
- **Data Integrity**: ACID compliance where needed

### 3. Security
- **Authentication**: Multi-factor authentication
- **Authorization**: Role-based access control
- **Data Protection**: Encryption at rest and in transit
- **Audit Trail**: Complete activity logging

### 4. Maintainability
- **Modularity**: Loosely coupled components
- **Testability**: Comprehensive test coverage
- **Monitoring**: Real-time system health monitoring
- **Documentation**: Complete technical documentation

## Technology Stack

### Frontend Technologies
- **Web Interface**: React.js, TypeScript, Tailwind CSS
- **IDE Extensions**: VS Code API, Language Server Protocol
- **Mobile**: Progressive Web App (PWA)

### Backend Technologies
- **API Layer**: Node.js, Express.js, GraphQL
- **Processing**: Python, TensorFlow, OpenAI API
- **Database**: PostgreSQL, Redis, Elasticsearch
- **Message Queue**: RabbitMQ, Apache Kafka

### Infrastructure
- **Cloud Platform**: AWS, Azure, or Google Cloud
- **Containerization**: Docker, Kubernetes
- **CI/CD**: GitHub Actions, Jenkins
- **Monitoring**: Prometheus, Grafana, ELK Stack

## Next Steps

1. **Deep Dive Components**: Review [Component Architecture](component-architecture.md)
2. **Understand Data Flow**: Study [Data Flow Diagrams](data-flow-diagrams.md)
3. **Plan Integrations**: Examine [Integration Architecture](integration-architecture.md)
4. **Design Deployment**: Review [Deployment Architecture](deployment-architecture.md)

---

*This system overview provides the foundation for understanding the BMAD platform architecture and its key components.*

**Story 2.2 Progress Update:**
-  Created `docs/system-architecture/README.md` - Architecture documentation overview
-  Created `docs/system-architecture/system-overview.md` - High-level system architecture
-  **In Progress**: Need to create remaining architecture documents

**Story 2.2 Status**: 25% complete (2/8 points)

Should I continue with the remaining architecture documents (component-architecture.md, data-flow-diagrams.md, integration-architecture.md, deployment-architecture.md) to complete Story 2.2?
