Phase 0 completion: NT8 SDK core framework with risk management and position sizing

docs/architecture/project_overview.md

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+# NT8 Institutional SDK Project Overview
+
+## Project Information
+- **Title**: NT8 Institutional SDK
+- **Version**: 1.0
+- **Date**: 2025-09-09
+- **Description**: Professional-grade algorithmic trading SDK for NinjaTrader 8, built for institutional use with comprehensive risk management and deterministic execution.
+
+## Project Goals
+1. Create a robust, institutional-grade SDK for algorithmic trading in NinjaTrader 8
+2. Implement comprehensive risk management with tiered controls
+3. Provide flexible position sizing algorithms
+4. Ensure deterministic execution for reliable backtesting
+5. Establish modular architecture for easy strategy development
+
+## Architecture Principles
+1. **Risk First** - All trades pass through risk management before execution
+2. **Deterministic** - Identical inputs produce identical outputs for testing
+3. **Modular** - Strategies are thin plugins, SDK handles infrastructure
+4. **Observable** - Structured logging with correlation IDs throughout
+5. **Test-Driven** - Comprehensive unit tests with >90% coverage
+
+## Completed Phase 0 Components
+- Repository structure and configuration files
+- Core interfaces and models
+- Risk management implementation (BasicRiskManager)
+- Position sizing implementation (BasicPositionSizer)
+- Comprehensive test suite
+- CI/CD pipeline configuration
+- Documentation
+
+## Technology Stack
+### Runtime Dependencies
+- .NET 6.0
+- Microsoft.Extensions.Logging
+- Microsoft.Extensions.Configuration
+
+### Development Dependencies
+- xUnit (testing framework)
+- FluentAssertions (assertion library)
+- Bogus (test data generation)
+- Moq (mocking framework)
+
+## Validation Status
+- Solution builds successfully with 0 warnings
+- All unit tests pass with >90% coverage
+- Risk management scenarios validated
+- Position sizing calculations verified
+- Multi-symbol support confirmed