mcp server done

parts/packages.nix

@@ -1,7 +1,32 @@
 { inputs, ... }:
 {
   perSystem =
-    { system, ... }:
+    { system, pkgs, ... }:
+    let
+      mcpServerPkg = pkgs.python3Packages.buildPythonPackage {
+        pname = "nixos-mcp-server";
+        version = "0.1.0";
+        src = inputs.self + "/scripts/mcp-server";
+        pyproject = true;
+        build-system = with pkgs.python3Packages; [
+          setuptools
+          wheel
+        ];
+        propagatedBuildInputs = with pkgs.python3Packages; [
+          click
+          mcp
+        ];
+        doCheck = false;
+      };
+      mcpPython = pkgs.python3.withPackages (_: [ mcpServerPkg ]);
+      nixosMcp = pkgs.writeShellApplication {
+        name = "nixos-mcp";
+        runtimeInputs = [ mcpPython ];
+        text = ''
+          exec ${mcpPython}/bin/python -m mcp_server.server
+        '';
+      };
+    in
     {
       packages = (inputs.jawz-scripts.packages.${system} or { }) // {
         emacs-vm = inputs.nixos-generators.nixosGenerate {
@@ -13,6 +38,8 @@
             outputs = inputs.self;
           };
         };
+        nixos-mcp = nixosMcp;
+        nixos-mcp-server = mcpServerPkg;
       };
     };
 }