# File Modification Boundaries — Production Hardening

You are fixing specific gaps. These are the ONLY files you may touch.

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## ✅ Files You MAY Modify

| File | What to Change |
|---|---|
| `src/NT8.Adapters/Strategies/NT8StrategyBase.cs` | Add `EnableKillSwitch`, `EnableVerboseLogging` NinjaScript params; add kill switch early-exit in `OnBarUpdate`; wire `ExecutionCircuitBreaker`; call `_circuitBreaker.RecordOrderRejection()` from `OnOrderUpdate` |
| `src/NT8.Core/Execution/TrailingStopManager.cs` | Fix `CalculateNewStopPrice()` — replace placeholder math with real formulas for `FixedTrailing`, `ATRTrailing`, `Chandelier` |
| `src/NT8.Core/Logging/BasicLogger.cs` | Add `LogLevel MinimumLevel` property; skip writes below minimum level |
| `src/NT8.Core/MarketData/SessionManager.cs` | Add static CME holiday list; update `IsRegularTradingHours()` to return `false` on holidays |

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## ✅ Files You MAY Create (New)

| File | Purpose |
|---|---|
| `tests/NT8.Core.Tests/Execution/TrailingStopManagerFixedTests.cs` | Unit tests for fixed trailing stop calculations |

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## ❌ Files You Must NOT Touch

| File / Directory | Reason |
|---|---|
| `src/NT8.Adapters/NinjaTrader/NT8OrderAdapter.cs` | The stub does NOT block execution — `NT8StrategyBase.SubmitOrderToNT8()` is what submits orders. Leave the adapter alone. |
| `src/NT8.Adapters/Strategies/SimpleORBNT8.cs` | Strategy wrapper is correct |
| `src/NT8.Strategies/Examples/SimpleORBStrategy.cs` | Strategy logic is correct |
| `src/NT8.Core/OMS/**` | Complete and tested |
| `src/NT8.Core/Risk/**` | Complete and tested |
| `src/NT8.Core/Sizing/**` | Complete and tested |
| `src/NT8.Core/Intelligence/**` | Complete and tested |
| `src/NT8.Core/Analytics/**` | Complete and tested |
| `src/NT8.Core/Execution/ExecutionCircuitBreaker.cs` | Already correct — only instantiate and use it, don't modify |
| `src/NT8.Core/Common/**` | Interfaces and models — never touch |
| `Directory.Build.props` | Never touch |
| `*.csproj` | Never touch |
| Any existing passing test file | Do not break passing tests |

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## Quick Self-Check

Before editing any file, ask:
1. Is this file in the allowed list above?
2. Am I changing an interface? → STOP
3. Am I modifying existing Risk/Sizing/OMS/Intelligence/Analytics code? → STOP
4. Am I breaking a passing test? → STOP