回测基本一致

shared/core/__init__.py

@@ -0,0 +1,20 @@
+"""The frozen bar-by-bar fill simulator (doc 02 §2, doc 03).
+
+The engine is **strategy-agnostic**: it consumes bars + signal arrays +
+stop/target arrays and simulates fills. All strategy math (when to enter,
+where to put stops) lives in the caller. Once an engine reproduces your EA
+within the expected fidelity gap (doc 03 §8) it is **frozen** (doc 04 Rule 1)
+— never edit a validated engine to test an idea; fork it instead.
+"""
+from .engine import Direction, Engine, Position, Result, Trade
+from .metrics import Metrics, compute_metrics
+
+__all__ = [
+    "Direction",
+    "Engine",
+    "Position",
+    "Result",
+    "Trade",
+    "Metrics",
+    "compute_metrics",
+]