diff --git a/src/rougail/structural_bitwarden/__init__.py b/src/rougail/structural_bitwarden/__init__.py
index d5d2b22..38bdbf5 100644
--- a/src/rougail/structural_bitwarden/__init__.py
+++ b/src/rougail/structural_bitwarden/__init__.py
@@ -19,4 +19,3 @@ from .object_model import Variable
 
 
 __all__ = ("Variable",)
-
diff --git a/src/rougail/structural_bitwarden/annotator.py b/src/rougail/structural_bitwarden/annotator.py
new file mode 100644
index 0000000..c35c7d7
--- /dev/null
+++ b/src/rougail/structural_bitwarden/annotator.py
@@ -0,0 +1,67 @@
+"""
+Silique (https://www.silique.fr)
+Copyright (C) 2025
+
+distribued with GPL-2 or later license
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+        
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+            
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+"""
+from rougail.error import DictConsistencyError
+from rougail.annotator.variable import Walk
+from .i18n import _
+
+
+class Annotator(Walk):
+    """Annotate for bitwarden"""
+                
+    level = 95
+                
+    def __init__(
+        self,
+        objectspace,
+        *args,  # pylint: disable=unused-argument
+    ) -> None:
+        if not objectspace.paths:
+            return
+        self.objectspace = objectspace
+        self.check_variable()
+
+    def check_variable(self):
+        for variable in self.get_variables():
+            if not variable.bitwarden:
+                continue
+            path = variable.path
+            if variable.type not in ["unix_user", "secret"]:
+                msg = _('only "unix_user" or "secret" variable type can have "bitwarden" attribute, but "{0}" has type "{1}"')
+                raise DictConsistencyError(msg.format(path, variable.type), 301, variable.xmlfiles)
+            if variable.multi and path not in self.objectspace.leaders:
+                msg = _('the variable "{0}" has attribute "bitwarden" but is a multi variable')
+                raise DictConsistencyError(msg.format(path), 302, variable.xmlfiles)
+            check_default_value = True
+            if path in self.objectspace.followers:
+                leadership = path.rsplit('.', 1)[0]
+                leader_path = self.objectspace.parents[leadership][0]
+                leader = self.objectspace.paths[leader_path]
+                if leader.bitwarden:
+                    if variable.default:
+                        msg = _('the variable "{0}" is a follower and leader variable ("{1}") is also in Bitwarden so this variable could not have default value')
+                        raise DictConsistencyError(msg.format(path, leader_path), 303, variable.xmlfiles)
+                    check_default_value = False
+            if check_default_value and not variable.default:
+                msg = _('the variable "{0}" is in Bitwarden so should have default value')
+                raise DictConsistencyError(msg.format(path), 304, variable.xmlfiles)
+            self.objectspace.informations.add(path, "bitwarden", True)
+            self.objectspace.informations.add(path, "default_value_makes_sense", False)
+            self.objectspace.properties.add(path, "novalidator", True)