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

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-# nt8-sdk
+# NT8 SDK Repository

-Ninjatrader 
+## Project Status: ✅ Phase 0 Complete - Ready for Phase 1
+
+This repository contains a sophisticated institutional trading SDK designed for NinjaTrader 8 integration. The SDK implements a risk-first architecture with advanced position sizing and deterministic behavior.
+
+## 🚨 Important: .NET Framework 4.8 Compatibility
+
+This project targets **NinjaTrader 8** and MUST maintain compatibility with:
+- **.NET Framework 4.8** (NOT .NET Core/.NET 5+)
+- **C# 5.0 language features only**
+- **Traditional class syntax** (NO modern C# features)
+
+## Quick Start
+
+### Prerequisites
+- .NET Framework 4.8
+- Visual Studio 2019/2022 or VSCode
+- NinjaTrader 8 (for integration)
+
+### Build Verification
+```bash
+# Clone and verify build
+git clone <repository-url>
+cd nt8-sdk
+.\verify-build.bat
+```
+
+Should output: `✅ All checks passed!`
+
+## Architecture Overview
+
+### Core Components
+- **Risk Management**: Tier 1 controls (daily loss limits, per-trade limits, position limits)
+- **Position Sizing**: Fixed contracts and fixed dollar risk methods
+- **Strategy Framework**: Thin plugin architecture for trading strategies
+- **Logging System**: Structured logging compatible with .NET Framework 4.8
+
+### Design Principles
+1. **Risk-First**: All trades pass through risk validation before execution
+2. **Deterministic**: Identical inputs produce identical outputs
+3. **Modular**: Strategies are plugins, SDK handles infrastructure
+4. **Observable**: Comprehensive logging with correlation IDs
+
+## Project Structure
+
+```
+nt8-sdk/
+├── src/
+│   ├── NT8.Core/           # Core trading framework
+│   ├── NT8.Adapters/       # NinjaTrader 8 integration (Phase 1)
+│   ├── NT8.Strategies/     # Example strategies (Phase 1)
+│   └── NT8.Contracts/      # Data contracts (Phase 1)
+├── tests/
+│   ├── NT8.Core.Tests/     # Unit tests
+│   ├── NT8.Integration.Tests/
+│   └── NT8.Performance.Tests/
+└── docs/                   # Documentation
+```
+
+## Development Guidelines
+
+### For AI Agents
+**MUST READ** before making any changes:
+- [`AI_DEVELOPMENT_GUIDELINES.md`](AI_DEVELOPMENT_GUIDELINES.md) - Compatibility requirements
+- [`CODE_STYLE_GUIDE.md`](CODE_STYLE_GUIDE.md) - Required code patterns
+- [`CODE_REVIEW_CHECKLIST.md`](CODE_REVIEW_CHECKLIST.md) - Pre-commit verification
+
+### For Human Developers
+1. Review the guidelines above
+2. Run `.\verify-build.bat` before committing
+3. Follow existing code patterns in the repository
+4. Maintain .NET Framework 4.8 compatibility
+
+## Phase Status
+
+### ✅ Phase 0 (Complete)
+- Repository structure and build system
+- Core interfaces and models
+- Basic risk management (Tier 1)
+- Basic position sizing
+- Test framework setup
+
+### 🔄 Phase 1 (In Progress)
+- NinjaTrader 8 integration adapters
+- Market data provider implementation
+- Order management system
+- Enhanced risk controls (Tier 2)
+
+### 📋 Future Phases
+- Advanced risk controls (Phases 2-3)
+- Confluence scoring system (Phase 4)
+- Analytics and optimization (Phase 5)
+- Production hardening (Phase 6)
+
+## Key Features
+
+### Risk Management
+```csharp
+// All trades go through risk validation
+var riskDecision = riskManager.ValidateOrder(intent, context, config);
+if (!riskDecision.Allow)
+{
+    // Trade rejected - log reason and stop
+    return;
+}
+```
+
+### Position Sizing
+```csharp
+// Intelligent position sizing with risk controls
+var sizingResult = positionSizer.CalculateSize(intent, context, config);
+var contracts = sizingResult.Contracts; // Final contract count
+```
+
+### Strategy Framework
+```csharp
+// Strategies are thin plugins - SDK handles everything else
+public class MyStrategy : IStrategy
+{
+    public StrategyIntent OnBar(BarData bar, StrategyContext context)
+    {
+        // Strategy logic here - return trading intent
+        return new StrategyIntent(/* parameters */);
+    }
+}
+```
+
+## Testing
+
+### Run All Tests
+```bash
+dotnet test --configuration Release
+```
+
+### Test Coverage
+- Core components: >90% coverage
+- Risk scenarios: Comprehensive test suite
+- Integration tests: End-to-end validation
+
+## Building
+
+### Development Build
+```bash
+dotnet build --configuration Debug
+```
+
+### Release Build
+```bash
+dotnet build --configuration Release
+```
+
+### Full Verification
+```bash
+.\verify-build.bat
+```
+
+## Contributing
+
+### Code Changes
+1. Read development guidelines (see links above)
+2. Follow existing patterns
+3. Add unit tests
+4. Run verification script
+5. Submit for review
+
+### Architecture Changes
+All architecture changes must:
+- Maintain risk-first design
+- Preserve deterministic behavior
+- Support NinjaTrader 8 compatibility
+- Include comprehensive tests
+
+## License
+
+[Specify your license here]
+
+## Support
+
+For technical issues:
+1. Check build verification: `.\verify-build.bat`
+2. Review development guidelines
+3. Examine existing code patterns
+4. Create issue with full error details
+
+---
+
+**Remember**: This SDK prioritizes institutional-grade risk management and NinjaTrader 8 compatibility above all else. All development must maintain these core principles.