diff --git a/default.nix b/default.nix
new file mode 100644
index 0000000..a8d6ff5
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,28 @@
+# ============================================================================
+# User Configuration for hdh20267
+# ============================================================================
+# This file defines the user account configuration that will be merged into
+# the NixOS system's ugaif.users namespace.
+
+{ inputs, pkgs, ... }:
+
+{
+  # ========== User Metadata ==========
+
+  description = "HDH";
+  shell = pkgs.zsh;
+  hashedPassword = "!";
+
+  opensshKeys = [
+    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBC7xzHxY2BfFUybMvG4wHSF9oEAGzRiLTFEndLvWV/X hdh20267@engr733847d.engr.uga.edu"
+  ];
+
+  # ========== External Home Configuration ==========
+
+  home = ./home.nix;
+
+  # ========== Additional ugaif Options ==========
+
+  useZshTheme = true;
+  useNvimPlugins = true;
+}