AUREUS / BUILD 212 PUBLIC IMPLEMENTATION EVIDENCE

SOURCES
- infrastructure/execution/mt5_executor.py SHA-256 4aa9ff9435bb3fc4d02e9aca3765173f2398544646c1dc1eaef0e53246691c98
- infrastructure/execution/broker_execution_gate.py SHA-256 d3829131406716d3a8ec0833a9c9af058cfcd49255be4fee2538fb061060e731
- infrastructure/mt5/gateway.py SHA-256 bb5f501a3ab3bc979f5ca6d217a6eeea0da126e64d8c93d323777a5fc59cd0cc

PUBLICATION: selected execution and broker-boundary excerpts
BOUNDARY: strategy logic, account identifiers, credentials and private runtime paths are not published.

WHAT THIS PROVES
- Broker permission checks are separated from the executor.
- Account-bound multi-account mode re-checks the active MT5 login/server immediately before mutation.
- mt5.order_send() is implemented and a fill requires TRADE_RETCODE_DONE.
- The MT5 gateway reads account, open-position and deal-history state.
- The captured runtime window published separately remained fail-closed; this source excerpt is not presented as proof of a completed fill.

MT5 EXECUTOR EXCERPT
0021: class MT5Executor(Executor):
0022:     """
0023:     Executes approved trades through MetaTrader 5.
0024: 
0025:     This class owns only the final order_send responsibility.
0026: 
0027:     Broker permission checks are delegated to BrokerExecutionGate so execution
0028:     safety can evolve independently from the executor.
0029: 
0030:     In account-bound multi-account mode, this executor performs a final
0031:     login/server binding check immediately before order_send. This prevents a
0032:     trade from being sent if the process is no longer attached to the expected
0033:     MT5 account after the broker execution gate approved the request.
0076:         if decision.request is None:
0077:             return self._rejected(
0078:                 candidate=candidate,
0079:                 reason="Broker execution gate approved without an order request.",
0080:             )
0081: 
0082:         binding_rejection_reason = self._order_send_binding_rejection_reason()
0083: 
0084:         if binding_rejection_reason is not None:
0085:             return self._rejected(
0086:                 candidate=candidate,
0087:                 reason=binding_rejection_reason,
0088:             )
0089: 
0090:         result = mt5.order_send(decision.request)
0091: 
0092:         if result is None:
0093:             return self._rejected(
0094:                 candidate=candidate,
0095:                 reason=f"MT5 order_send failed: {mt5.last_error()}",
0096:             )
0097: 
0098:         if result.retcode != mt5.TRADE_RETCODE_DONE:
0099:             return self._rejected(
0100:                 candidate=candidate,
0101:                 reason=(
0102:                     f"MT5 order rejected | "
0103:                     f"retcode={result.retcode} | "
0104:                     f"comment={result.comment}"
0105:                 ),
0106:             )
0107: 
0108:         return ExecutionReport(
0109:             status="FILLED",
0110:             symbol=candidate.symbol,
0111:             direction=candidate.direction,
0112:             order_type=candidate.order_type,
0113:             entry_price=float(result.price),
0114:             stop_loss=float(candidate.stop_loss),
0115:             take_profit=float(candidate.take_profit),
0116:             volume=self.volume,
0117:             ticket=str(result.order),
0118:             executed_at=datetime.utcnow(),
0119:             reason="MT5 demo execution successful.",
0120:         )

BROKER EXECUTION GATE EXCERPT
0316:     ) -> BrokerExecutionDecision:
0317:         """
0318:         Conservative XAUUSD market availability gate.
0319: 
0320:         This intentionally blocks known unsafe windows before order_send:
0321:         - Saturday closure
0322:         - conservative Sunday pre-open window
0323:         - conservative Friday close window
0324:         - daily metals rollover / broker maintenance break
0325: 
0326:         Later, this should move to broker-specific schedule config.
0327:         """
0646:             order_type = None
0647:             price = float(candidate.entry)
0648: 
0649:         return {
0650:             "action": mt5.TRADE_ACTION_DEAL,
0651:             "symbol": candidate.symbol,
0652:             "volume": volume,
0653:             "type": order_type,
0654:             "price": price,
0655:             "sl": float(candidate.stop_loss),
0656:             "tp": float(candidate.take_profit),
0657:             "deviation": deviation,
0658:             "magic": magic_number,
0659:             "comment": "AUREUS",
0660:             "type_time": mt5.ORDER_TIME_GTC,
0661:             "type_filling": mt5.ORDER_FILLING_IOC,

MT5 GATEWAY EXCERPT
0022:     """
0023:     Read-side MT5 gateway.
0024: 
0025:     In legacy single-account mode, this gateway keeps the previous behavior and
0026:     calls mt5.initialize() without an explicit path.
0027: 
0028:     In account-bound multi-account mode, it initializes MT5 using the terminal
0029:     path supplied by AccountRuntimeSettings. This ensures each isolated Python
0030:     process connects to its assigned MT5 terminal/account instead of relying on
0031:     MetaTrader5's global/default terminal resolution.
0065:     def get_account_snapshot(self) -> AccountSnapshot | None:
0066:         if not self.connect():
0067:             return None
0068: 
0069:         account = mt5.account_info()
0070: 
0071:         if account is None:
0072:             print("[MT5 Gateway] Account info unavailable")
0073:             return None
0074: 
0075:         return AccountSnapshot(
0076:             login=int(account.login),
0077:             server=str(account.server),
0078:             company=str(account.company),
0079:             name=str(account.name),
0177:             numeric_position_id = int(position_id)
0178:         except (TypeError, ValueError):
0179:             return []
0180: 
0181:         deals = self._history_deals_get_by_position(numeric_position_id)
0182: 
0183:         if len(deals) == 0:
0184:             deals = self._history_deals_get_recent(
0185:                 lookback_days=lookback_days,
0186:             )
0187:             deals = [
0188:                 deal
0189:                 for deal in deals
0190:                 if deal.position_id == str(numeric_position_id)