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docs/integration-services/message-bus/README.md

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+# Message Bus
+
+## Overview
+The Message Bus service will provide the central event-driven communication infrastructure for the stock-bot platform. It will enable reliable, scalable, and decoupled interaction between services through asynchronous messaging, event streaming, and publish-subscribe patterns.
+
+## Planned Features
+
+### Messaging Infrastructure
+- **Topic-based Messaging**: Publish-subscribe communication model
+- **Message Queuing**: Reliable message delivery with persistence
+- **Event Streaming**: Real-time event processing with replay capabilities
+- **Message Routing**: Dynamic routing based on content and metadata
+- **Quality of Service**: Various delivery guarantee levels (at-least-once, exactly-once)
+
+### Message Processing
+- **Message Transformation**: Content transformation and enrichment
+- **Message Filtering**: Rules-based filtering of messages
+- **Schema Validation**: Enforcement of message format standards
+- **Serialization Formats**: Support for JSON, Protocol Buffers, Avro
+- **Compression**: Message compression for efficiency
+
+### Operational Features
+- **Dead Letter Handling**: Management of unprocessable messages
+- **Message Tracing**: End-to-end tracing of message flow
+- **Event Sourcing**: Event storage and replay capability
+- **Rate Limiting**: Protection against message floods
+- **Back-pressure Handling**: Flow control mechanisms
+
+### Integration Capabilities
+- **Service Discovery**: Dynamic discovery of publishers/subscribers
+- **Protocol Bridging**: Support for multiple messaging protocols
+- **External System Integration**: Connectors for external message systems
+- **Legacy System Adapters**: Integration with non-event-driven systems
+- **Web Integration**: WebSocket and SSE support for web clients
+
+## Planned Integration Points
+
+### Service Connections
+- All platform microservices as publishers and subscribers
+- Trading Dashboard (for real-time updates)
+- External Data Sources (for ingestion)
+- Monitoring Systems (for operational events)
+
+## Planned Technical Implementation
+
+### Technology Stack
+- **Messaging Platform**: Kafka or RabbitMQ
+- **Client Libraries**: Native TypeScript SDK
+- **Monitoring**: Prometheus integration for metrics
+- **Management**: Admin interface for topic/queue management
+- **Storage**: Optimized storage for event persistence
+
+### Architecture Pattern
+- Event-driven architecture
+- Publish-subscribe pattern
+- Command pattern for request-response
+- Circuit breaker for resilience
+
+## Development Guidelines
+
+### Message Design
+- Event schema standards
+- Versioning approach
+- Backward compatibility requirements
+- Message size considerations
+
+### Integration Patterns
+- Event notification pattern
+- Event-carried state transfer
+- Command messaging pattern
+- Request-reply pattern implementations
+
+### Operational Considerations
+- Monitoring requirements
+- Scaling guidelines
+- Disaster recovery approach
+- Message retention policies
+
+## Implementation Roadmap
+1. Core messaging infrastructure
+2. Service integration patterns
+3. Operational tooling and monitoring
+4. Advanced features (replay, transformation)
+5. External system connectors and adapters