first push

backend/app/agents/qa_agent.py

@@ -0,0 +1,10 @@
+async def run_qa_agent(generated_code: dict) -> dict:
+    """
+    Agent QA minimal :
+    - renvoie un statut de validation simulé
+    """
+    return {
+        "status": "passed",
+        "logs": [],
+        "checked_files": generated_code.get("tree", []),
+    }