npm packages and ulimit

modules/darwin/home-manager.nix

@@ -62,6 +62,9 @@ in
           };
           stateVersion = "23.11";
         };
+
+        home.activation.ensureNpmCliTools = import ./npm.nix { inherit lib pkgs; };
+
         catppuccin = {
           autoEnable = true;
           enable = true;
@@ -184,6 +187,7 @@ in
             initContent =
               let
                 zshConfigEarlyInit = lib.mkOrder 500 ''
+                  ulimit -n 524288 
                   if [[ -f /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh ]]; then
                     . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh
                     . /nix/var/nix/profiles/default/etc/profile.d/nix.sh

modules/darwin/npm.nix

@@ -0,0 +1,29 @@
+{ lib, pkgs }:
+
+let
+  npmPackages = [
+    "@enact/cli"
+    "@webos-tools/cli"
+    "patch-package"
+  ];
+in
+lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+  # Ensure required npm CLI tools are installed in the user prefix.
+  NPM_BIN="${pkgs.nodejs}/bin/npm"
+  export NPM_CONFIG_PREFIX="$HOME/.npm-packages"
+  export PATH="${pkgs.nodejs}/bin:$NPM_CONFIG_PREFIX/bin:$PATH"
+
+  if [[ ! -x "$NPM_BIN" ]]; then
+    echo "npm not found; skipping npm CLI installation step"
+    exit 0
+  fi
+
+  for pkg in ${lib.concatStringsSep " " (map lib.escapeShellArg npmPackages)}; do
+    if "$NPM_BIN" list -g --depth=0 "$pkg" >/dev/null 2>&1; then
+      echo "npm package already installed: $pkg"
+    else
+      echo "installing npm package: $pkg"
+      "$NPM_BIN" install -g "$pkg"
+    fi
+  done
+''