feat: full poc

module.nix

@@ -0,0 +1,42 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+let
+  inherit (lib)
+    mkEnableOption
+    mkPackageOption
+    mkIf
+    getExe
+    ;
+  name = "Niri Tag Manager";
+in
+{
+  options.services.niri-tag = {
+    enable = mkEnableOption name;
+    package = mkPackageOption pkgs name {
+      nullable = true;
+      default = "niri-tag";
+    };
+  };
+  config =
+    let
+      cfg = config.services.niri-tag;
+    in
+    mkIf (cfg.enable) {
+      systemd.user.services.niri-tag = {
+        enable = true;
+        description = name;
+        wantedBy = [ "graphical-session.target" ];
+        partOf = [ "graphical-session.target" ];
+        serviceConfig = {
+          Type = "notify";
+          Restart = "always";
+          ExecStart = "${getExe cfg.package}";
+          PrivateTmp = true;
+        };
+      };
+    };
+}