{ inputs, ... }:
{
  perSystem =
    { 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 ${mcpPython}/bin/python -m mcp_server.server
        '';
      };
      mcpTests = pkgs.writeShellApplication {
        name = "mcp-tests";
        runtimeInputs = with pkgs.python3Packages; [
          black
          click
          mypy
          pytest
          ruff
        ];
        text = ''
          start_dir="$PWD"
          if [ -n "''${MCP_TESTS_WORKDIR:-}" ]; then
            cd "''${MCP_TESTS_WORKDIR}"
          elif [ -n "''${GITEA_WORKSPACE:-}" ]; then
            cd "''${GITEA_WORKSPACE}"
          elif [ -n "''${GITHUB_WORKSPACE:-}" ]; then
            cd "''${GITHUB_WORKSPACE}"
          elif command -v git >/dev/null 2>&1; then
            repo_root="$(git rev-parse --show-toplevel 2>/dev/null || true)"
            if [ -n "$repo_root" ]; then
              cd "$repo_root"
            fi
          fi
          while [ ! -x ./scripts/mcp-server/run-tests.sh ]; do
            if [ "$PWD" = "/" ]; then
              echo "Could not find executable scripts/mcp-server/run-tests.sh starting from $start_dir" >&2
              exit 1
            fi
            cd ..
          done
          exec bash ./scripts/mcp-server/run-tests.sh "$@"
        '';
      };
    in
    {
      packages = (inputs.jawz-scripts.packages.${system} or { }) // {
        emacs-vm = inputs.self.nixosConfigurations.emacs.config.system.build.vm;
        vps-linode = inputs.self.nixosConfigurations.vps.config.system.build.images.linode;
        mcp-tests = mcpTests;
        nixos-mcp = nixosMcp;
        nixos-mcp-server = mcpServerPkg;
      };
    };
}