Enforce platform cash reserve policy

Author: Pigbibi

application/rebalance_service.py

@@ -168,13 +168,10 @@ def _runtime_metadata_with_execution_policy(
     settings: PlatformRuntimeSettings,
 ) -> dict[str, Any]:
     runtime_metadata = dict(metadata or {})
-    runtime_metadata.setdefault(
-        "firstrade_execution_policy",
-        {
-            "reserved_cash_floor_usd": float(settings.reserved_cash_floor_usd or 0.0),
-            "reserved_cash_ratio": float(settings.reserved_cash_ratio or 0.0),
-        },
-    )
+    runtime_metadata["firstrade_execution_policy"] = {
+        "reserved_cash_floor_usd": float(settings.reserved_cash_floor_usd or 0.0),
+        "reserved_cash_ratio": float(settings.reserved_cash_ratio or 0.0),
+    }
     return runtime_metadata
 
 

tests/test_rebalance_service.py

@@ -4,7 +4,7 @@
 from types import SimpleNamespace
 
 from application.firstrade_client import FirstradeCredentials
-from application.rebalance_service import run_strategy_cycle
+from application.rebalance_service import _runtime_metadata_with_execution_policy, run_strategy_cycle
 from notifications.telegram import I18N, build_translator, render_cycle_summary
 from quant_platform_kit.strategy_contracts import PositionTarget, StrategyDecision
 from runtime_config_support import PlatformRuntimeSettings
@@ -36,6 +36,32 @@ def _runtime_settings_with_persistence(**overrides) -> PlatformRuntimeSettings:
     return PlatformRuntimeSettings(**values)
 
 
+def test_runtime_metadata_uses_platform_execution_policy_over_strategy_metadata():
+    metadata = {
+        "signal": "ok",
+        "firstrade_execution_policy": {
+            "reserved_cash_floor_usd": 1.0,
+            "reserved_cash_ratio": 0.0,
+        },
+    }
+
+    result = _runtime_metadata_with_execution_policy(
+        metadata,
+        settings=_runtime_settings_with_persistence(
+            reserved_cash_floor_usd=250.0,
+            reserved_cash_ratio=0.03,
+        ),
+    )
+
+    assert result == {
+        "signal": "ok",
+        "firstrade_execution_policy": {
+            "reserved_cash_floor_usd": 250.0,
+            "reserved_cash_ratio": 0.03,
+        },
+    }
+
+
 class FakeFirstradeClient:
     def __init__(self, _credentials, *, live_trading_enabled=False):
         self.live_trading_enabled = live_trading_enabled