diff --git a/AGENTS.md b/AGENTS.md
index 4f88908..4b9a436 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -99,6 +99,8 @@ application や system より抽象度の高い「機能」単位で、複数の
 ### `profiles/` — ホスト構成
 
 features の `enable` を指定するだけの薄い層。ロジックは書かない。
+`profiles/` から `my.system.*.enable` / `my.applications.*.enable` を直接指定しない。
+必要な場合は必ず `modules/features/` に feature 層を作り、profile では `my.features.*.enable` のみ指定する。
 
 | カテゴリ      | 役割                 | 例                                         |
 | ------------- | -------------------- | ------------------------------------------ |
diff --git a/modules/features/services/default.nix b/modules/features/services/default.nix
index e4e39fa..7b5a6f5 100644
--- a/modules/features/services/default.nix
+++ b/modules/features/services/default.nix
@@ -2,5 +2,6 @@
   imports = [
     ./container.nix
     ./kde.nix
+    ./quem-guest.nix
   ];
 }
diff --git a/modules/features/services/quem-guest.nix b/modules/features/services/quem-guest.nix
new file mode 100644
index 0000000..1fe359b
--- /dev/null
+++ b/modules/features/services/quem-guest.nix
@@ -0,0 +1,13 @@
+{ lib, config, ... }:
+let
+  cfg = config.my.features.services.quemGuest;
+in
+{
+  options.my.features.services.quemGuest = {
+    enable = lib.mkEnableOption "QEMU guest support";
+  };
+
+  config = lib.mkIf cfg.enable {
+    my.system.quem.enable = true;
+  };
+}
diff --git a/profiles/platforms/vm.nix b/profiles/platforms/vm.nix
index 5871f89..3ae9c58 100644
--- a/profiles/platforms/vm.nix
+++ b/profiles/platforms/vm.nix
@@ -1,8 +1,7 @@
 {
-  my.system.quem.enable = true;
-
   my.features = {
     boot.uefi.enable = true;
+    services.quemGuest.enable = true;
     storage.nfsClient.enable = true;
   };
 }