diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index d6479bb6..7cf7a4ca 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -1616,6 +1616,11 @@ jobs:
         shell: bash
         run: python3 tests/mwrap/check_installed_template.py --mcpp "$MCPP" --package mcpplibs.mwrap.md4c@0.5.3
 
+      - name: Installed accesskit wrapper archive and actual default tree template
+        if: contains(format(' {0} ', env.MEMBERS), ' accesskit-tree ') && matrix.toolchain == 'default'
+        shell: bash
+        run: python3 tests/mwrap/check_installed_template.py --mcpp "$MCPP" --package mcpplibs.mwrap.accesskit@0.23.1
+
       - name: Installed Lua wrapper archive and actual default script template
         if: contains(format(' {0} ', env.MEMBERS), ' lua-embed ') && matrix.toolchain == 'default'
         shell: bash
diff --git a/mcpp.toml b/mcpp.toml
index d36127b5..17f0bc9c 100644
--- a/mcpp.toml
+++ b/mcpp.toml
@@ -17,6 +17,7 @@ members = [
     "tests/mwrap/ffmpeg-cpu",
     "tests/mwrap/imgui-headless",
     "tests/mwrap/md4c-render",
+    "tests/mwrap/accesskit-tree",
     "tests/mwrap/lua-embed",
     "tests/mwrap/quickjs-embed",
     "tests/mwrap/pocketpy-embed",
diff --git a/pkgs/mwrap/accesskit.lua b/pkgs/mwrap/accesskit.lua
new file mode 100644
index 00000000..83c71b3a
--- /dev/null
+++ b/pkgs/mwrap/accesskit.lua
@@ -0,0 +1,38 @@
+-- Immutable upstream-aligned mwrap source release (accesskit-m mwrap-0.23.1).
+-- The CN mirror is added by a maintainer with mcpp-res access; until then CN
+-- users fall back to the GitHub release (docs/cn-mirror.md).
+package = {
+    spec = "1",
+    namespace = "mcpplibs.mwrap",
+    name = "accesskit",
+    description = "accesskit-m: AccessKit's C bindings as a C++23 module (one accessibility tree served to UIA, NSAccessibility and AT-SPI)",
+    licenses = { "Apache-2.0" },
+    repo = "https://github.com/mcpplibs/accesskit-m",
+    type = "package",
+    extensions = {
+        autoupdate = {
+            tag = "mwrap-${version}",
+            url = "https://github.com/mcpplibs/accesskit-m/releases/download/${tag}/accesskit-m-${version}.tar.gz",
+        },
+    },
+    xpm = {
+        linux = {
+            ["0.23.1"] = {
+                url = "https://github.com/mcpplibs/accesskit-m/releases/download/mwrap-0.23.1/accesskit-m-0.23.1.tar.gz",
+                sha256 = "799928a7914f3eef7808f358f6bd14c8b18b141e0cd4f34eff99ea8b282fe893",
+            },
+        },
+        macosx = {
+            ["0.23.1"] = {
+                url = "https://github.com/mcpplibs/accesskit-m/releases/download/mwrap-0.23.1/accesskit-m-0.23.1.tar.gz",
+                sha256 = "799928a7914f3eef7808f358f6bd14c8b18b141e0cd4f34eff99ea8b282fe893",
+            },
+        },
+        windows = {
+            ["0.23.1"] = {
+                url = "https://github.com/mcpplibs/accesskit-m/releases/download/mwrap-0.23.1/accesskit-m-0.23.1.tar.gz",
+                sha256 = "799928a7914f3eef7808f358f6bd14c8b18b141e0cd4f34eff99ea8b282fe893",
+            },
+        },
+    },
+}
diff --git a/tests/mwrap/accesskit-tree/mcpp.toml b/tests/mwrap/accesskit-tree/mcpp.toml
new file mode 100644
index 00000000..e44f3ee3
--- /dev/null
+++ b/tests/mwrap/accesskit-tree/mcpp.toml
@@ -0,0 +1,11 @@
+[package]
+name = "accesskit-tree"
+version = "0.23.1"
+description = "Consume the immutable accesskit wrapper: build a tree update through the module and read it back"
+
+[indices]
+# Use the complete candidate built-in index prepared by tests/run_members.sh.
+# An explicit empty table overrides the legacy workspace redirect.
+
+[dependencies]
+"mcpplibs.mwrap.accesskit" = "0.23.1"
diff --git a/tests/mwrap/accesskit-tree/tests/behavior.cpp b/tests/mwrap/accesskit-tree/tests/behavior.cpp
new file mode 100644
index 00000000..8a6049a1
--- /dev/null
+++ b/tests/mwrap/accesskit-tree/tests/behavior.cpp
@@ -0,0 +1,48 @@
+// Through the module: a window holding a button built, read back through the
+// library's debug view, and on Linux served by an AT-SPI adapter. The names
+// are AccessKit's own (no namespace of this package's).
+import std;
+import mcpplibs.mwrap.accesskit;
+
+namespace {
+
+accesskit_tree_update* tree(void*) {
+    accesskit_node* window = accesskit_node_new(ACCESSKIT_ROLE_WINDOW);
+    accesskit_node_set_label(window, "Settings");
+    accesskit_node_push_child(window, 2);
+    accesskit_node* button = accesskit_node_new(ACCESSKIT_ROLE_BUTTON);
+    accesskit_node_set_label(button, "Save");
+    accesskit_node_add_action(button, ACCESSKIT_ACTION_CLICK);
+    accesskit_node_set_toggled(button, ACCESSKIT_TOGGLED_FALSE);
+    accesskit_tree_update* update = accesskit_tree_update_with_capacity_and_focus(2, 2);
+    accesskit_tree_update_set_tree_info(update, accesskit_tree_info_new(1));
+    accesskit_tree_update_push_node(update, 1, window);
+    accesskit_tree_update_push_node(update, 2, button);
+    return update;
+}
+
+}  // namespace
+
+int main() {
+    accesskit_tree_update* update = tree(nullptr);
+    char* debug = accesskit_tree_update_debug(update);
+    const bool named = debug && std::string_view(debug).contains("Save") && std::string_view(debug).contains("Settings");
+    if (debug) accesskit_string_free(debug);
+    accesskit_tree_update_free(update);
+    if (!named) {
+        std::println(std::cerr, "the update does not hold the window and its button");
+        return 1;
+    }
+#if defined(__linux__)
+    accesskit_unix_adapter* adapter = accesskit_unix_adapter_new(
+        tree, nullptr, [](accesskit_action_request* r, void*) { accesskit_action_request_free(r); }, nullptr, [](void*) {}, nullptr);
+    if (!adapter) {
+        std::println(std::cerr, "no AT-SPI adapter");
+        return 1;
+    }
+    accesskit_unix_adapter_update_window_focus_state(adapter, true);
+    accesskit_unix_adapter_free(adapter);
+#endif
+    std::println("accesskit through its module: a window and its button");
+    return 0;
+}