feat(fish): add shell shortcut registry

modules/toolkit.nix

@@ -1,7 +1,13 @@
-{ config, lib, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
 # The baseline interactive toolset as one deliberate bundle.
 let
   cfg = config.modules.toolkit;
+  user = config.user.name;
 in
 {
   options.modules.toolkit.enable =
@@ -9,6 +15,52 @@ in
 
   # Each piece is turned on at default priority, so a host can still override any one of them.
   config = lib.mkIf cfg.enable {
+    home-manager.users.${user}.home.packages = with pkgs; [
+      eza
+      wget
+    ];
+
+    registry.shell-shortcut.${config.networking.hostName} = {
+      ls = {
+        command = "eza -alg --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      la = {
+        command = "eza -a --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      ll = {
+        command = "eza -lg --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      lt = {
+        command = "eza -aT -I '.git' --color=always --group-directories-first --icons=always";
+        abbreviation = false;
+      };
+      "l." = {
+        command = "eza -a | grep -e '^\\.'";
+        abbreviation = false;
+      };
+
+      # Walk up the tree.
+      ".." = "cd ..";
+      "..." = "cd ../..";
+      "...." = "cd ../../..";
+
+      cp = "cp -v";
+      tarnow = "tar -acf ";
+      untar = "tar -zxvf ";
+      wget = "wget -c ";
+      grep = "grep --color=auto";
+      fgrep = "fgrep --color=auto";
+      egrep = "egrep --color=auto";
+      jctl = "journalctl -p 3 -xb";
+
+      # Rebuild the system, and reclaim disk from old generations.
+      update = "sudo nixos-rebuild switch --flake .#${config.networking.hostName}";
+      cleanup = "sudo nix-collect-garbage -d";
+    };
+
     modules.fish.enable = lib.mkDefault true;
     # fish is also the login shell, so the bundled environment is what a shell drops into.
     modules.fish.defaultShell = lib.mkDefault true;