Feat: Add Hermes brain change buttons and skills.sh guide source

backend/services/agent.py

@@ -46,3 +46,47 @@ def agent_status() -> dict:
         "has_skills": (home / "skills").exists(),
         "has_memories": (home / "memories").exists(),
     }
+
+
+def update_brain_model(new_model: str) -> bool:
+    from config import HERMES_HOME
+    home = HERMES_HOME
+    config_path = home / "config.yaml"
+    
+    # Ensure home directory exists
+    home.mkdir(parents=True, exist_ok=True)
+    
+    cfg = {}
+    if config_path.exists():
+        try:
+            from ruamel.yaml import YAML
+            r_yaml = YAML()
+            with config_path.open("r", encoding="utf-8") as f:
+                cfg = r_yaml.load(f) or {}
+        except Exception:
+            cfg = {}
+            
+    if not isinstance(cfg, dict):
+        cfg = {}
+        
+    if "model" not in cfg or not isinstance(cfg["model"], dict):
+        cfg["model"] = {}
+        
+    cfg["model"]["model"] = new_model
+    
+    try:
+        from ruamel.yaml import YAML
+        r_yaml = YAML()
+        with config_path.open("w", encoding="utf-8") as f:
+            r_yaml.dump(cfg, f)
+            
+        # Restart the user-space service to apply changes
+        try:
+            import services.maintenance as maintenance
+            maintenance.restart_service("hermes-gateway")
+        except Exception:
+            pass
+            
+        return True
+    except Exception:
+        return False