diff --git a/xmanager/contrib/executor_selector.py b/xmanager/contrib/executor_selector.py
index cd2abd9..9b7b6ce 100644
--- a/xmanager/contrib/executor_selector.py
+++ b/xmanager/contrib/executor_selector.py
@@ -47,40 +47,20 @@
 executor = executor_fn(**kwargs)
 """
 
-import enum
 from typing import Callable, List, Optional, Union
 
-from absl import flags
 from xmanager import xm
+from xmanager import xm_flags
 from xmanager import xm_local
 
 
-class XMLaunchMode(enum.Enum):
-  """Specifies an executor to run an experiment."""
-
-  VERTEX = 'vertex'
-  LOCAL = 'local'
-  INTERACTIVE = 'interactive'
-
-
-_XM_LAUNCH_MODE = flags.DEFINE_enum_class(
-    'xm_launch_mode',
-    XMLaunchMode.VERTEX,
-    XMLaunchMode,
-    'How to launch the experiment. Supports local and interactive execution, '
-    + 'launch on '
-    +
-    'Vertex.',
-)
-
-
-def launch_mode() -> XMLaunchMode:
-  return _XM_LAUNCH_MODE.value
+def launch_mode() -> xm_flags.XMLaunchMode:
+  return xm_flags.XM_LAUNCH_MODE.value
 
 
 def create_experiment(
     experiment_title: Optional[str] = None,
-    mode: Optional[XMLaunchMode] = None,
+    mode: Optional[xm_flags.XMLaunchMode] = None,
 ) -> xm.Experiment:
   """Creates an experiment depending on the launch mode.
 
@@ -99,9 +79,9 @@ def create_experiment(
     mode = launch_mode()
 
   if mode in (
-      XMLaunchMode.LOCAL,
-      XMLaunchMode.INTERACTIVE,
-      XMLaunchMode.VERTEX,
+      xm_flags.XMLaunchMode.LOCAL,
+      xm_flags.XMLaunchMode.INTERACTIVE,
+      xm_flags.XMLaunchMode.VERTEX,
   ):
     # TODO: add import here?
     return xm_local.create_experiment(experiment_title)
@@ -128,7 +108,7 @@ def setup_local(*args, **kwargs_in) -> xm_local.Local:
 
 
 def get_executor(
-    mode: Optional[XMLaunchMode] = None,
+    mode: Optional[xm_flags.XMLaunchMode] = None,
 ) -> Callable[..., xm.Executor]:
   """Select an `xm.Executor` specialization depending on the launch mode.
 
@@ -145,8 +125,11 @@ def get_executor(
   if mode is None:
     mode = launch_mode()
 
-  if mode == XMLaunchMode.VERTEX:
+  if mode == xm_flags.XMLaunchMode.VERTEX:
     return xm_local.Caip
-  if mode == XMLaunchMode.LOCAL or mode == XMLaunchMode.INTERACTIVE:
-    return _local_executor(mode == XMLaunchMode.INTERACTIVE)
+  if (
+      mode == xm_flags.XMLaunchMode.LOCAL
+      or mode == xm_flags.XMLaunchMode.INTERACTIVE
+  ):
+    return _local_executor(mode == xm_flags.XMLaunchMode.INTERACTIVE)
   raise ValueError(f'Unknown launch mode: {mode}')
diff --git a/xmanager/contrib/gcs.py b/xmanager/contrib/gcs.py
index 87616ae..9dcd56e 100644
--- a/xmanager/contrib/gcs.py
+++ b/xmanager/contrib/gcs.py
@@ -26,16 +26,7 @@
 import os
 
 from absl import app
-from absl import flags
-
-_GCS_PATH = flags.DEFINE_string(
-    'xm_gcs_path',
-    None,
-    (
-        'A GCS directory within a bucket to store output '
-        '(in gs://bucket/directory format).'
-    ),
-)
+from xmanager import xm_flags
 
 _GS_PREFIX = 'gs://'
 _GCS_PREFIX = '/gcs/'
@@ -64,17 +55,17 @@ def get_gcs_path_or_fail(project_name: str) -> str:
     If the --xm_gcs_path flag is empty, or contains invalid value, raise an
     error. Otherwise, returns a flag value.
   """
-  if not _GCS_PATH.value:
+  if not xm_flags.GCS_PATH.value:
     raise app.UsageError(
         '--xm_gcs_path is missing. Suggestion: '
         + f'--xm_gcs_path={suggestion(project_name)}'
     )
-  elif not is_gcs_path(_GCS_PATH.value):
+  elif not is_gcs_path(xm_flags.GCS_PATH.value):
     raise app.UsageError(
         '--xm_gcs_path not in gs://bucket/directory or /gcs/path format. '
         + f'Suggestion: --xm_gcs_path={suggestion(project_name)}'
     )
-  return str(_GCS_PATH.value)
+  return str(xm_flags.GCS_PATH.value)
 
 
 def is_gs_path(path: str) -> bool:
diff --git a/xmanager/xm_flags.py b/xmanager/xm_flags.py
index 35852e5..5a18417 100644
--- a/xmanager/xm_flags.py
+++ b/xmanager/xm_flags.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 """XManager Flags."""
 
+import enum
 from absl import flags
 
 # -------------------- xm_local --------------------
@@ -55,3 +56,33 @@
 BAZEL_COMMAND = flags.DEFINE_string(
     'xm_bazel_command', 'bazel', 'A command that runs Bazel.',
 )
+
+# -------------------- contrib --------------------
+
+GCS_PATH = flags.DEFINE_string(
+    'xm_gcs_path',
+    None,
+    (
+        'A GCS directory within a bucket to store output '
+        '(in gs://bucket/directory format).'
+    ),
+)
+
+
+class XMLaunchMode(enum.Enum):
+  """Specifies an executor to run an experiment."""
+
+  VERTEX = 'vertex'
+  LOCAL = 'local'
+  INTERACTIVE = 'interactive'
+
+
+XM_LAUNCH_MODE = flags.DEFINE_enum_class(
+    'xm_launch_mode',
+    XMLaunchMode.VERTEX,
+    XMLaunchMode,
+    'How to launch the experiment. Supports local and interactive execution, '
+    + 'launch on '
+    +
+    'Vertex.',
+)