initial dendritic migration

modules/dev.nix

@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.dotfiles.dev;
+in
+{
+  options.dotfiles.dev = {
+    enable = lib.mkEnableOption "Development tools and language servers";
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [
+      gcc
+      gnumake
+      clang-tools
+      lldb
+      python3
+      uv
+      ruff
+      ty
+      nil
+      nixd
+    ];
+  };
+}