initial dendritic migration

modules/shell.nix

@@ -0,0 +1,72 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.dotfiles.shell;
+in
+{
+  options.dotfiles.shell = {
+    enable = lib.mkEnableOption "Shell, Git, GPG, and CLI environment";
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [
+      git
+      wget
+      tree
+      tealdeer
+      gnupg
+      pass
+      p7zip
+      btop
+      helix
+      opencode
+    ];
+
+    home-manager.users.semere = {
+      programs.git = {
+        enable = true;
+        settings = {
+          user = {
+            name = "Semere M. Mebrahtom";
+            email = "semere.meharena1@gmail.com";
+          };
+          commit.gpgsign = true;
+          gpg.program = "gpg";
+        };
+        signing = {
+          key = "451054EEC0D2AFD1741D4E6A7FC937214DF30488";
+          signByDefault = true;
+        };
+      };
+
+      services.gpg-agent = {
+        enable = true;
+        defaultCacheTtl = 1800;
+        enableSshSupport = true;
+        pinentry.package = pkgs.pinentry-curses;
+      };
+
+      programs.bash = {
+        enable = true;
+        shellAliases = {
+          ll = "ls -lha";
+        };
+      };
+
+      programs.fzf = {
+        enable = true;
+        enableBashIntegration = true;
+      };
+
+      programs.helix = {
+        enable = true;
+        settings = {
+          editor = {
+            line-numbers = "relative";
+            lsp.display-messages = true;
+          };
+        };
+      };
+    };
+  };
+}