nixos: add playwright-cli

nixos/overlay.nix

@@ -264,6 +264,34 @@ in
   in
   final.python3.withPackages my-python-packages;
 
+  playwright-cli = final.buildNpmPackage rec {
+    pname = "playwright-cli";
+    version = "0.1.0";
+
+    src = final.fetchFromGitHub {
+      owner = "microsoft";
+      repo = "playwright-cli";
+      rev = "v${version}";
+      hash = "sha256-9LuLQ2klYz91rEkxNDwcx0lYgE6GPoTJkwgxI/4EHgg=";
+    };
+
+    # Hash of dependencies produced from package-lock.json (lockfileVersion = 3).
+    # To recompute:
+    #   nix build nixpkgs#prefetch-npm-deps -o /tmp/prefetch-npm-deps
+    #   /tmp/prefetch-npm-deps/bin/prefetch-npm-deps package-lock.json
+    npmDepsHash = "sha256-DvorQ40CCNQJNQdTPFyMBErFNicSWkNT/e6S8cfZlRA=";
+
+    # No build step; the published CLI is just a Node entrypoint + deps.
+    dontNpmBuild = true;
+
+    meta = with final.lib; {
+      description = "Playwright CLI (playwright-cli) for browser automation and Playwright MCP terminal commands";
+      homepage = "https://github.com/microsoft/playwright-cli";
+      license = licenses.asl20;
+      mainProgram = "playwright-cli";
+    };
+  };
+
   pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
     (
       python-final: python-prev: {