Implement Fallback Portfolio wiring in tasks.py

tasks.py

@@ -2126,3 +2126,27 @@ def cross_review_prs():
                 continue
 
     return {"reviews": len(results), "details": results}
+
+def get_model_for_task(task_class, agent_name=None):
+    """Implement the Fallback Portfolio doctrine (docs/fallback-portfolios.md).
+    
+    Reads fallback-portfolios.yaml and returns the primary model for the given task class.
+    If primary fails, the agent should call this again with an incremented 'attempt' (not implemented here).
+    """
+    import yaml
+    portfolio_path = Path(__file__).parent / "fallback-portfolios.yaml"
+    if not portfolio_path.exists():
+        return "gemini-1.5-flash" # Default fallback
+        
+    with open(portfolio_path, "r") as f:
+        portfolios = yaml.safe_load(f)
+        
+    # 1. Check agent-specific portfolio
+    if agent_name and agent_name in portfolios.get("agents", {}):
+        return portfolios["agents"][agent_name]["primary"]["model"]
+        
+    # 2. Check task-class portfolio
+    if task_class in portfolios.get("role_classes", {}):
+        return portfolios["role_classes"][task_class]["primary"]["model"]
+        
+    return "gemini-1.5-flash"