diff --git a/metagpt/environment/android_env/android_env.py b/metagpt/environment/android_env/android_env.py
index c6058aa4a..87b49750d 100644
--- a/metagpt/environment/android_env/android_env.py
+++ b/metagpt/environment/android_env/android_env.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 # @Desc   : MG Android Env
 
-from metagpt.env.android_env.android_ext_env import AndroidExtEnv
+from metagpt.environment.android_env.android_ext_env import AndroidExtEnv
 
 
 class AndroidEnv(AndroidExtEnv):
diff --git a/metagpt/environment/api/env_api.py b/metagpt/environment/api/env_api.py
index 1e6df544d..60c3215c8 100644
--- a/metagpt/environment/api/env_api.py
+++ b/metagpt/environment/api/env_api.py
@@ -18,7 +18,7 @@ class EnvAPIAbstract(BaseModel):
 class EnvAPIRegistry(BaseModel):
     """the registry to store environment w&r api/interface"""
 
-    registry: dict[str, dict[str, Union[dict, Any, str]]] = Field(default=dict(), exclude=True)
+    registry: dict[str, Callable] = Field(default=dict(), exclude=True)
 
     def get(self, api_name: str):
         if api_name not in self.registry:
diff --git a/metagpt/environment/base_env.py b/metagpt/environment/base_env.py
index 024c46877..d13514faf 100644
--- a/metagpt/environment/base_env.py
+++ b/metagpt/environment/base_env.py
@@ -47,7 +47,6 @@ def mark_as_readable(func):
 def mark_as_writeable(func):
     """mark functionn as a writeable one in ExtEnv, it does something to ExtEnv"""
     env_write_api_registry[func.__name__] = get_function_schema(func)
-    return func
 
 
 class ExtEnv(BaseModel):
diff --git a/metagpt/environment/gym_env/gym_env.py b/metagpt/environment/gym_env/gym_env.py
index 2bcf8efd0..b83d988d6 100644
--- a/metagpt/environment/gym_env/gym_env.py
+++ b/metagpt/environment/gym_env/gym_env.py
@@ -1,3 +1,7 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# @Desc   :
+# @Desc   : MG Gym Env
+
+
+class GymEnv:
+    pass
diff --git a/metagpt/environment/mincraft_env/mincraft_env.py b/metagpt/environment/mincraft_env/mincraft_env.py
index 2bcf8efd0..e79b87cf0 100644
--- a/metagpt/environment/mincraft_env/mincraft_env.py
+++ b/metagpt/environment/mincraft_env/mincraft_env.py
@@ -1,3 +1,9 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# @Desc   :
+# @Desc   : MG Mincraft Env
+
+from metagpt.environment.mincraft_env.mincraft_ext_env import MincraftExtEnv
+
+
+class MincraftEnv(MincraftExtEnv):
+    pass
diff --git a/metagpt/environment/mincraft_env/mincraft_ext_env.py b/metagpt/environment/mincraft_env/mincraft_ext_env.py
index 2bcf8efd0..6012a80d9 100644
--- a/metagpt/environment/mincraft_env/mincraft_ext_env.py
+++ b/metagpt/environment/mincraft_env/mincraft_ext_env.py
@@ -1,3 +1,9 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# @Desc   :
+# @Desc   : The Mincraft external environment to integrate with Mincraft game
+
+from metagpt.environment.base_env import ExtEnv
+
+
+class MincraftExtEnv(ExtEnv):
+    pass
diff --git a/metagpt/environment/werewolf_env/werewolf_env.py b/metagpt/environment/werewolf_env/werewolf_env.py
index 29e9f9b81..831f8e020 100644
--- a/metagpt/environment/werewolf_env/werewolf_env.py
+++ b/metagpt/environment/werewolf_env/werewolf_env.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 # @Desc   : MG Werewolf Env
 
-from metagpt.env.werewolf_env.werewolf_ext_env import WerewolfExtEnv
+from metagpt.environment.werewolf_env.werewolf_ext_env import WerewolfExtEnv
 
 
 class WerewolfEnv(WerewolfExtEnv):
diff --git a/metagpt/environment/werewolf_env/werewolf_ext_env.py b/metagpt/environment/werewolf_env/werewolf_ext_env.py
index 8543ce246..014417009 100644
--- a/metagpt/environment/werewolf_env/werewolf_ext_env.py
+++ b/metagpt/environment/werewolf_env/werewolf_ext_env.py
@@ -6,7 +6,7 @@ from enum import Enum
 
 from pydantic import Field
 
-from metagpt.env.base_env import ExtEnv, mark_as_readable, mark_as_writeable
+from metagpt.environment.base_env import ExtEnv, mark_as_readable, mark_as_writeable
 
 
 class RoleState(Enum):
diff --git a/metagpt/utils/common.py b/metagpt/utils/common.py
index e443c3466..0f6df8c94 100644
--- a/metagpt/utils/common.py
+++ b/metagpt/utils/common.py
@@ -604,6 +604,29 @@ def read_csv_to_list(curr_file: str, header=False, strip_trail=True):
         return analysis_list[0], analysis_list[1:]
 
 
+def read_csv_to_list(curr_file: str, header=False, strip_trail=True):
+    """
+    Reads in a csv file to a list of list. If header is True, it returns a
+    tuple with (header row, all rows)
+    ARGS:
+      curr_file: path to the current csv file.
+    RETURNS:
+      List of list where the component lists are the rows of the file.
+    """
+    logger.debug(f"start read csv: {curr_file}")
+    analysis_list = []
+    with open(curr_file) as f_analysis_file:
+        data_reader = csv.reader(f_analysis_file, delimiter=",")
+        for count, row in enumerate(data_reader):
+            if strip_trail:
+                row = [i.strip() for i in row]
+            analysis_list += [row]
+    if not header:
+        return analysis_list
+    else:
+        return analysis_list[0], analysis_list[1:]
+
+
 def import_class(class_name: str, module_name: str) -> type:
     module = importlib.import_module(module_name)
     a_class = getattr(module, class_name)