refactor(modules): rename system/ to nixos/

Clearer naming to distinguish NixOS system modules from
Home Manager modules (nixos/ vs home/).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

modules/nixos/amd.nix

@@ -0,0 +1,3 @@
+{pkgs, ...}: {
+  hardware.amdgpu.initrd.enable = true;
+}

modules/nixos/backlight.nix

@@ -0,0 +1,12 @@
+{
+  pkgs,
+  myConfig,
+  config,
+  ...
+}: {
+  hardware.i2c.enable = true;
+  # boot.extraModulePackages = [config.boot.kernelPackages.ddcci-driver];
+  # boot.kernelModules = ["ddcci_backlight"];
+  environment.systemPackages = with pkgs; [ddcutil];
+  users.users.${myConfig.nixos.username}.extraGroups = ["i2c"];
+}

modules/nixos/boot.nix

@@ -0,0 +1,29 @@
+{pkgs, ...}: {
+  boot = {
+    consoleLogLevel = 3;
+    initrd.verbose = false;
+    loader = {
+      timeout = 0;
+      systemd-boot = {
+        enable = true;
+      };
+
+      efi = {
+        canTouchEfiVariables = true;
+        efiSysMountPoint = "/boot";
+      };
+    };
+    initrd = {
+      systemd.enable = true;
+    };
+    plymouth = {
+      enable = true;
+      # themePackages = [
+      #   (pkgs.adi1090x-plymouth-themes.override {
+      #     selected_themes = ["circle_hud"];
+      #   })
+      # ];
+      # theme = "circle_hud";
+    };
+  };
+}

modules/nixos/default.nix

@@ -0,0 +1,25 @@
+{pkgs, ...}: {
+  imports = [
+    ./time.nix
+    ./nix.nix
+    ./backlight.nix
+    ./boot.nix
+    ./amd.nix
+    ./hardware.nix
+    ./home-manager.nix
+    ./services.nix
+    ./user.nix
+    ./version.nix
+    ./fonts.nix
+    ./programs.nix
+    ./security.nix
+    ./variables.nix
+    ./kernel.nix
+  ];
+  environment.systemPackages = with pkgs; [
+    # FIXME: must be on their own app
+    git
+    cloudflared
+    cachix
+  ];
+}

modules/nixos/fonts.nix

@@ -0,0 +1,21 @@
+{pkgs, ...}: {
+  fonts.packages = with pkgs; [
+    nerd-fonts.fira-code
+    nerd-fonts.jetbrains-mono
+
+    # google
+    noto-fonts
+    noto-fonts-cjk-sans
+    noto-fonts-cjk-serif
+    noto-fonts-color-emoji
+    roboto
+    open-sans
+    lato
+    montserrat
+    inter
+    poppins
+    fira-code
+    fira-code-symbols
+    jetbrains-mono
+  ];
+}

modules/nixos/gaming.nix

@@ -0,0 +1,21 @@
+{pkgs, ...}: {
+  hardware.graphics = {
+    enable = true;
+    enable32Bit = true; # For 32-bit games
+  };
+
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true;
+    localNetworkGameTransfers.openFirewall = true;
+    extest.enable = true;
+    gamescopeSession.enable = true;
+    extraCompatPackages = with pkgs; [
+      proton-ge-bin
+    ];
+  };
+
+  programs.gamemode.enable = true;
+  # Fix slow Steam Download speeds
+  services.resolved.enable = true;
+}

modules/nixos/hardware.nix

@@ -0,0 +1,23 @@
+{
+  pkgs,
+  myConfig,
+  ...
+}: {
+  hardware = {
+    bluetooth = {
+      enable = true;
+      powerOnBoot = true;
+    };
+  };
+  networking = {
+    hostName = myConfig.nixos.hostname;
+    networkmanager.enable = true;
+    networkmanager.wifi.backend = "iwd";
+    wireless.iwd.enable = true;
+    firewall = {
+      enable = true;
+      allowedTCPPorts = [22 80];
+      allowedUDPPorts = [53];
+    };
+  };
+}

modules/nixos/home-manager.nix

@@ -0,0 +1,18 @@
+{
+  specialArgs,
+  myConfig,
+  inputs,
+  ...
+}: {
+  nixpkgs.overlays = [inputs.nur.overlays.default];
+  home-manager = {
+    backupFileExtension = "backup";
+    useGlobalPkgs = true;
+    useUserPackages = true;
+    extraSpecialArgs = specialArgs;
+    users.${myConfig.nixos.username} = import ../../home/hakase.nix;
+  };
+
+  imports = [
+  ];
+}

modules/nixos/hyprland.nix

@@ -0,0 +1,29 @@
+{
+  myConfig,
+  inputs,
+  pkgs,
+  ...
+}: {
+  programs.hyprland = {
+    enable = true;
+    package = inputs.hyprland.packages.${pkgs.stdenv.hostPlatform.system}.hyprland;
+    portalPackage = inputs.hyprland.packages.${pkgs.stdenv.hostPlatform.system}.xdg-desktop-portal-hyprland;
+    withUWSM = true;
+  };
+
+  environment.systemPackages = [
+    pkgs.hyprpicker
+    pkgs.hyprlock
+    pkgs.hypridle
+    pkgs.hyprpaper
+    pkgs.hyprsunset
+    pkgs.hyprpolkitagent
+  ];
+
+  xdg.terminal-exec = {
+    enable = true;
+    settings = {
+      default = ["${myConfig.terminal.default}"];
+    };
+  };
+}

modules/nixos/kernel.nix

@@ -0,0 +1,13 @@
+{pkgs, ...}: {
+  boot = {
+    kernelPackages = pkgs.linuxPackages_cachyos; # from chaotic input
+    kernelParams = [
+      "quiet"
+      "splash"
+      "intremap=on"
+      "boot.shell_on_fail"
+      "udev.log_priority=3"
+      "rd.systemd.show_status=auto"
+    ];
+  };
+}

modules/nixos/nix.nix

@@ -0,0 +1,15 @@
+{pkgs, ...}: {
+  nix.settings = {
+    substituters = [
+      "https://cache.nixos.org"
+      "https://hyprland.cachix.org"
+      "https://nix-community.cachix.org"
+    ];
+    trusted-public-keys = [
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
+    experimental-features = ["nix-command" "flakes"];
+  };
+}

modules/nixos/programs.nix

@@ -0,0 +1,11 @@
+{pkgs, ...}: {
+  programs = {
+    bash.interactiveShellInit = ''
+      if [[ $(${pkgs.procps}/bin/ps --no-header --pid=$PPID --format=comm) != "fish" && -z ''${BASH_EXECUTION_STRING} ]]; then
+        shopt -q login_shell && LOGIN_OPTION='--login' || LOGIN_OPTION=""
+        exec ${pkgs.fish}/bin/fish $LOGIN_OPTION
+      fi
+    '';
+    fish.enable = true;
+  };
+}

modules/nixos/security.nix

@@ -0,0 +1,25 @@
+{
+  pkgs,
+  myConfig,
+  config,
+  ...
+}: {
+  security.pam.services.greetd.enableGnomeKeyring = true;
+  environment.systemPackages = with pkgs; [
+    sops
+    age
+    ssh-to-age
+  ];
+  sops = {
+    defaultSopsFile = ../../secrets/secrets.yaml;
+    age.keyFile = "/home/${myConfig.nixos.username}/.config/sops/age/keys.txt";
+    secrets = {
+      default_password = {
+        neededForUsers = true;
+      };
+      ssh_extra_config = {
+        owner = myConfig.nixos.username;
+      };
+    };
+  };
+}

modules/nixos/services.nix

@@ -0,0 +1,41 @@
+{
+  pkgs,
+  myConfig,
+  ...
+}: {
+  services = {
+    greetd = {
+      enable = true;
+      settings = {
+        initial_session = {
+          command = "${pkgs.hyprland}/bin/Hyprland";
+          user = "${myConfig.nixos.username}";
+        };
+        default_session = {
+          command = "${pkgs.tuigreet}/bin/tuigreet --time --remember --cmd Hyprland";
+        };
+      };
+    };
+
+    # essentials
+    openssh.enable = true; # FIXME: remove when done
+    blueman.enable = true;
+
+    # for encryption support for unfree apps
+    gnome.gnome-keyring.enable = true;
+
+    # Complements printer support
+    printing.enable = true;
+    avahi = {
+      enable = true;
+      nssmdns4 = true;
+      openFirewall = true;
+    };
+    pipewire = {
+      enable = true;
+      alsa = {
+        enable = true;
+      };
+    };
+  };
+}

modules/nixos/time.nix

@@ -0,0 +1,3 @@
+{myConfig, ...}: {
+  time.timeZone = myConfig.nixos.timezone;
+}

modules/nixos/user.nix

@@ -0,0 +1,18 @@
+{
+  pkgs,
+  myConfig,
+  config,
+  ...
+}: {
+  users = {
+    mutableUsers = false;
+    users = {
+      ${myConfig.nixos.username} = {
+        isNormalUser = true;
+        extraGroups = ["wheel" "networkmanager" "input" "video"];
+        hashedPasswordFile = config.sops.secrets.default_password.path; # FIXME: may not work!
+        useDefaultShell = true;
+      };
+    };
+  };
+}

modules/nixos/variables.nix

@@ -0,0 +1,7 @@
+{config, ...}: {
+  environment.sessionVariables = {
+    EDITOR = "nvim";
+    VISUAL = "nvim";
+    # AVANTE_GEMINI_API_KEY = config.sops.secrets.AVANTE_GEMINI_API_KEY.path;
+  };
+}

modules/nixos/version.nix

@@ -0,0 +1,10 @@
+{pkgs, ...}: {
+  system.stateVersion = "25.05";
+  nixpkgs.config.allowUnfree = true;
+  nix = {
+    distributedBuilds = true;
+    settings = {
+      builders-use-substitutes = true;
+    };
+  };
+}