diff --git a/src/common/actionflow.py b/src/common/actionflow.py
index 4201167..ced0da6 100644
--- a/src/common/actionflow.py
+++ b/src/common/actionflow.py
@@ -20,17 +20,14 @@ class ActionFlow:
         self.indices: dict[str, int] = {}
         self.actions: list[type[Action]] = []
         self.on: list[bool] = []
-
-    @classmethod
-    def normalize(cls, kind):
-        return str.upper(kind.__name__)
     
-    def do(self, action: str):
-        index = self.indices.get(action)
+    def do(self, action: type[Action]):
+        name = action.__name__
+        index = self.indices.get(name)
         assert index is not None
         
-        if self.on[index]: raise Unavailable(action)
-        if self.on[index] is None: raise NotAllowed(action)
+        if self.on[index]: raise Unavailable(name)
+        if self.on[index] is None: raise NotAllowed(name)
         value = self.actions[index].prepare()
         self.on[index] = bool(value)
 
@@ -40,27 +37,27 @@ class ActionFlow:
                 self.on[index] = False
                 self.actions[index].perform()
 
-    def index(self, kind: type[Action]) -> int:
-        name = self.normalize(kind)
+    def index(self, action: type[Action]) -> int:
+        name = action.__name__
         index = self.indices.get(name)
         assert index is not None
         return index
     
-    def allow(self, kind, value=True):
-        index = self.index(kind)
+    def allow(self, action: type[Action], value=True):
+        index = self.index(action)
         self.on[index] = False if value else None
 
-    def append(self, kind):
-        name = self.normalize(kind)
+    def append(self, action: type[Action]):
+        name = action.__name__
         index = len(self.indices)
 
         self.indices[name] = index
-        self.actions.insert(index, kind)
+        self.actions.insert(index, action)
         self.on.insert(index, None)
 
-    def remove(self, kind):
-        name = self.normalize(kind)
-        index = self.index(kind)
+    def remove(self, action: type[Action]):
+        name = action.__name__
+        index = self.index(action)
 
         self.indices.pop(name)
         self.actions.pop(index)