{
  description = "Scobleclaw laptop — NixOS configuration reproducing MacBook software capabilities on x86_64";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    pi-mono = {
      url = "git+https://os.scoble.me/forgejo/sscoble/pi-mono.git";
      flake = false;
    };
  };

  outputs = { self, nixpkgs, home-manager, pi-mono, ... }@inputs: let
    # System we're targeting (x86_64 NixOS laptop)
    system = "x86_64-linux";

    pkgs = import nixpkgs {
      inherit system;
      overlays = [ self.overlays.default ];
    };
  in {
    # Overlay — add pi and qmd to nixpkgs
    overlays.default = final: prev: {
      # pi coding agent — built from Forgejo mirror of pi-mono
      pi-coding-agent = final.buildNpmPackage {
        pname = "pi-coding-agent";
        version = "0.73.0";
        src = pi-mono;
        npmDepsHash = "";  # Set after first build: nix-build outputs the correct hash
        npmWorkspace = "packages/coding-agent";
        npmFlags = [ "--legacy-peer-deps" ];
        dontNpmBuild = true;
        preConfigure = ''
          # Build dependencies first (monorepo workspace order)
          cd packages/ai && npm run build && cd ../..
          cd packages/agent && npm run build && cd ../..
          cd packages/tui && npm run build && cd ../..
          cd packages/coding-agent && npm run build && cd ../..
        '';
        installPhase = ''
          runHook preInstall
          mkdir -p $out/lib/node_modules/@mariozechner/pi-coding-agent
          cp -r packages/coding-agent/dist $out/lib/node_modules/@mariozechner/pi-coding-agent/
          cp packages/coding-agent/package.json $out/lib/node_modules/@mariozechner/pi-coding-agent/
          mkdir -p $out/bin
          cat > $out/bin/pi <<'EOF'
          #!/usr/bin/env bash
          exec ${final.nodejs}/bin/node $out/lib/node_modules/@mariozechner/pi-coding-agent/dist/cli.js "$@"
          EOF
          chmod +x $out/bin/pi
          runHook postInstall
        '';
      };

      # qmd — vault search tool, wraps npm package via bun
      qmd = final.writeShellScriptBin "qmd" ''
        exec ${final.bun}/bin/bunx --bun @tobilu/qmd "$@"
      '';

      # Pi config directory structure (without secrets)
      pi-config-dir = final.runCommand "pi-config-dir" {} ''
        mkdir -p $out
        # Placeholder — real config should be restored from backup
        echo "# Pi agent configuration" > $out/README.md
        echo "# Defaults" > $out/settings.json
      '';
    };

    # NixOS configuration for the laptop
    nixosConfigurations.laptop = nixpkgs.lib.nixosSystem {
      inherit system;
      modules = [
        home-manager.nixosModules.home-manager
        ./modules/laptop.nix
        {
          home-manager.useGlobalPkgs = true;
          home-manager.useUserPackages = true;
          home-manager.users.sscoble = import ./home/sscoble.nix;
        }
      ];
    };

    # Standalone dev shell for trying things out
    devShells.${system}.default = pkgs.mkShell {
      buildInputs = with pkgs; [
        pi-coding-agent
        qmd
        nodejs
        bun
        git
        zsh
      ];
      shellHook = ''
        echo "🦞 Scobleclaw laptop dev shell"
        echo "  pi:      $(which pi)"
        echo "  qmd:     $(which qmd)"
        echo "  node:    $(node --version)"
        echo "  bun:     $(bun --version)"
        echo "  git:     $(git --version)"
      '';
    };
  };
}