diff --git a/caesium.home.nix b/caesium.home.nix
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index 0000000..e69de29
diff --git a/caesium.nixos.nix b/caesium.nixos.nix
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--- /dev/null
+++ b/caesium.nixos.nix
@@ -0,0 +1,70 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [ 
+    ./hardware-configuration.nix # Crucial: Imports your UUIDs
+  ];
+
+  # --- BOOTLOADER ---
+  boot.loader.systemd-boot.enable = true;
+  boot.loader.efi.canTouchEfiVariables = true;
+
+  networking.hostName = "caesium";
+  networking.networkmanager.enable = true;
+
+  # --- STORAGE & SSD OPTIMIZATION ---
+  # Enable TRIM for SSD longevity
+  services.fstrim.enable = true;
+  # Hard links duplicate files in the store to save space
+  nix.settings.auto-optimise-store = true;
+
+  # --- SWAP STRATEGY ---
+  # Primary Swap: Compressed RAM (Fastest)
+  zramSwap.enable = true;
+  zramSwap.memoryPercent = 25;
+
+  # Secondary Swap: 16GB File on Alpha (Safety Net)
+  swapDevices = [ {
+    device = "/var/lib/swapfile";
+    size = 16 * 1024; # 16GB
+  } ];
+
+  # --- USER & GROUPS ---
+  users.groups.storage = {};
+  users.users.mbessette = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" "networkmanager" "storage" "docker" ];
+  };
+
+  # --- FILE SYSTEMS (Overrides/Additions) ---
+  # Note: The UUIDs stay in hardware-configuration.nix. 
+  # We only list them here if we want to add specific options like compression.
+  
+  fileSystems."/nix".options = [ "subvol=@nix" "compress=zstd" "noatime" ];
+  fileSystems."/usr/local/bottles" = {
+    device = "/dev/disk/by-uuid/9523b80b-8a1f-4784-9750-9b8fadf91b92"; # Use the same Alpha UUID
+    fsType = "btrfs";
+    options = [ "subvol=@bottles" "compress=zstd" "noatime" ];
+  };
+
+  # --- SYSTEM PERMISSIONS ---
+  systemd.tmpfiles.rules = [
+    "d /usr/local/steam-games 0775 mbessette storage -"
+    "d /usr/local/bottles     0775 mbessette storage -"
+    "d /usr/local/Projects    0775 mbessette storage -"
+    "d /usr/local/docker-data 0770 root         root -"
+  ];
+
+  # --- VIRTUALIZATION ---
+  virtualisation.docker.enable = true;
+  virtualisation.docker.daemon.settings = {
+    data-root = "/usr/local/docker-data";
+  };
+
+  # --- NETWORKING ---
+  networking.hostName = "nixos-alpha";
+  networking.networkmanager.enable = true;
+
+  # --- SYSTEM VERSION ---
+  system.stateVersion = "24.11"; # Or current stable version
+}
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