feat: add USD/BRL and XAU/USD pipeline agents (Brief+Decio) with /api/usd/brief and /api/xau/brief routes

agents/xau_decio.py

@@ -0,0 +1,60 @@
+"""
+BrainSteel Fin — XAU Décio Agent
+Estrategista para ouro XAU/USD
+"""
+import os, json, requests
+from datetime import datetime
+
+class XAUDecioAgent:
+    def __init__(self, brief_data):
+        self.name = "XAUDecio"
+        self.brief_data = brief_data
+        self.openrouter_key = os.getenv("DECIO_API_KEY", os.getenv("OPENROUTER_API_KEY", ""))
+        self.openrouter_url = "https://openrouter.ai/api/v1/chat/completions"
+        self.model = "deepseek/deepseek-v4-flash:free"
+
+    def _calc_levels(self, price, action):
+        """Stop Loss 1.5%, Take Profit 3% para ouro."""
+        if action == "BUY":
+            return round(price * 0.985, 2), round(price * 1.03, 2)
+        elif action == "SELL":
+            return round(price * 1.015, 2), round(price * 0.97, 2)
+        return 0, 0
+
+    def run(self):
+        signal = self.brief_data.get("signal", "NEUTRO")
+        confidence = self.brief_data.get("confidence", 50)
+        price = self.brief_data.get("price", 0)
+        change_24h = self.brief_data.get("change_24h", 0)
+        us10y = self.brief_data.get("us10y_yield", 0)
+        fed_funds = self.brief_data.get("fed_funds", 0)
+
+        # Regra: confiança < 70% = HOLD
+        if confidence < 70 or signal == "NEUTRO":
+            return {
+                "decision": "HOLD",
+                "confidence": confidence,
+                "stop_loss": 0,
+                "take_profit": 0,
+                "justification": "Confiança abaixo de 70% ou sinal neutro",
+            }
+
+        # Ouro é refúgio: sobe com incerteza / yields baixas
+        action = "HOLD"
+        sl, tp = 0, 0
+        if signal == "ALTA":
+            action = "BUY"
+            sl, tp = self._calc_levels(price, action)
+        elif signal == "BAIXA":
+            action = "SELL"
+            sl, tp = self._calc_levels(price, action)
+
+        justification = f"""Ouro {signal}. US$ {price:,.2f}. Yield 10Y {us10y:.2f}%. Fed {fed_funds:.2f}%. Variação 24h {change_24h:+.2f}%. Confiança {confidence}%."""
+
+        return {
+            "decision": action,
+            "confidence": confidence,
+            "stop_loss": sl,
+            "take_profit": tp,
+            "justification": justification,
+        }