here we go

modules/home-manager/default.nix

@@ -0,0 +1,3 @@
+{
+  zellij-ps = import ./zellij-ps.nix;
+}

modules/home-manager/zellij-ps.nix

@@ -0,0 +1,44 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.programs.zellij-ps;
+in {
+  options = {
+    programs.zellij-ps = {
+      enable = mkEnableOption "Zellij Project Selector";
+      projectFolders = lib.mkOption {
+        type = lib.types.listOf lib.types.path;
+        description = "List of project folders for zellij-ps.";
+        default = ["${config.home.homeDirectory}/projects"];
+      };
+      layout = lib.mkOption {
+        type = lib.types.str;
+        description = "Layout for zellij";
+        default = ''
+          layout {
+                      pane size=1 borderless=true {
+                          plugin location="zellij:tab-bar"
+                      }
+                      pane
+                      pane split_direction="vertical" {
+                          pane
+                          pane command="htop"
+                      }
+                      pane size=2 borderless=true {
+                          plugin location="zellij:status-bar"
+                      }
+                  }
+        '';
+      };
+    };
+  };
+  config = mkIf cfg.enable {
+    home.packages = [pkgs.zellij-ps];
+    home.sessionVariables.PROJECT_FOLDERS = lib.concatStringsSep ":" cfg.projectFolders;
+    home.file.".config/zellij/layouts/zellij-ps.kdl".text = cfg.layout;
+  };
+}