diff --git a/meson.build b/meson.build
index e6ca45c..b19b81e 100644
--- a/meson.build
+++ b/meson.build
@@ -42,6 +42,7 @@ unstable_protocols = {
 	'xdg-output': ['v1'],
 	'xdg-shell': ['v5', 'v6'],
 	'xwayland-keyboard-grab': ['v1'],
+	'xdg-decoration-theme': ['v1'],
 }
 
 staging_protocols = {
diff --git a/unstable/xdg-decoration-theme/README b/unstable/xdg-decoration-theme/README
new file mode 100644
index 0000000..70a09dc
--- /dev/null
+++ b/unstable/xdg-decoration-theme/README
@@ -0,0 +1,5 @@
+xdg_decoration_theme protocol
+
+Maintainers:
+YaoBing Xiao <xiaoyaobing@uniontech.com> (@zzxyb)
+
diff --git a/unstable/xdg-decoration-theme/xdg-decoration-theme-unstable-v1.xml b/unstable/xdg-decoration-theme/xdg-decoration-theme-unstable-v1.xml
new file mode 100644
index 0000000..072581e
--- /dev/null
+++ b/unstable/xdg-decoration-theme/xdg-decoration-theme-unstable-v1.xml
@@ -0,0 +1,81 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="xdg_decoration_theme_v1">
+  <copyright>
+    Copyright © 2025 YaoBing Xiao
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <interface name="zxdg_decoration_theme_manager_v1" version="1">
+    <description summary="manager for window theme synchronization">
+      This global interface allows clients to inform the compositor of their
+      current light or dark theme preference.
+
+      The compositor may use this information to render matching decorations
+      consistent with the client's theme.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the theme manager object"/>
+    </request>
+
+    <request name="get_toplevel_theme">
+      <description summary="create a theme object associated with an xdg_toplevel">
+        Create a new decoration theme object associated with a given
+        xdg_toplevel. The theme object is used to notify the compositor when the
+        client changes between light and dark modes.
+      </description>
+      <arg name="id" type="new_id" interface="zxdg_toplevel_theme_v1"/>
+      <arg name="toplevel" type="object" interface="xdg_toplevel"/>
+    </request>
+  </interface>
+
+  <interface name="zxdg_toplevel_theme_v1" version="1">
+    <description summary="theme object for a toplevel surface">
+      The toplevel theme object allows a client to notify the compositor of its
+      active color theme.
+
+      The compositor should not enforce the client's theme, but may adjust
+      decoration colors to match the client's preference.
+    </description>
+
+    <enum name="theme">
+      <entry name="light" value="1" summary="client currently uses light theme"/>
+      <entry name="dark" value="2" summary="client currently uses dark theme"/>
+    </enum>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the theme object"/>
+    </request>
+
+    <request name="set_theme">
+      <description summary="notify compositor of current theme">
+        Notify the compositor that the client is currently using the specified
+        theme mode. The compositor may use this information to adjust the color
+        of decorations for this toplevel.
+
+        This request can be sent any time, such as when the user toggles between
+        light and dark modes.
+      </description>
+      <arg name="theme" type="uint" enum="theme" summary="current theme mode"/>
+    </request>
+  </interface>
+</protocol>
+