stock-bot/docs/enhanced-architecture.md

Enhanced Separation of Concerns

This guide describes how the project architecture has been improved to better separate concerns through a modular libs structure.

New Library Structure

We've reorganized the project's shared libraries for improved maintainability:

1. Shared Types (@stock-bot/shared-types)

Types are now organized by domain:

libs/shared-types/
├── src/
│   ├── market/        # Market data types (OHLCV, OrderBook)
│   ├── trading/       # Trading types (Orders, Positions)
│   ├── strategy/      # Strategy and signal types
│   ├── events/        # Event definitions 
│   ├── api/           # API response/request types
│   └── config/        # Configuration types

2. Event Bus (@stock-bot/event-bus)

A consistent event publishing system:

libs/event-bus/
├── src/
│   ├── EventBus.ts    # Core event bus implementation
│   └── index.ts       # Public API

3. Utils (@stock-bot/utils)

Shared utility functions:

libs/utils/
├── src/
│   ├── dateUtils.ts   # Date manipulation helpers
│   ├── financialUtils.ts # Financial calculations
│   ├── logger.ts      # Standardized logging
│   └── index.ts       # Public API

4. API Client (@stock-bot/api-client)

Type-safe service clients:

libs/api-client/
├── src/
│   ├── BaseApiClient.ts # Common HTTP client logic
│   ├── BacktestClient.ts # Backtest service client
│   ├── StrategyClient.ts # Strategy service client 
│   └── index.ts       # Public API

Service Architecture Improvements

The intelligence services have been split into focused services:

1. strategy-orchestrator: Core strategy management
2. backtest-engine: Dedicated historical testing
3. signal-engine: Signal generation

This provides:

• Better scaling for resource-intensive operations
• Focused codebases for each concern
• Independent deployment cycles
• Clear service boundaries

Usage Guidelines

• Use the shared types library for all data models
• Use the event bus for inter-service communication
• Use the API clients for direct service calls
• Use utility functions instead of duplicating common code

Next Steps

1. Continue migrating services to use the new libraries
2. Add comprehensive tests for each library
3. Create a complete API gateway for external access
4. Document service boundaries with OpenAPI schemas