diff --git a/home/bat/default.nix b/home/bat/default.nix
index d93fc36..1e810e8 100644
--- a/home/bat/default.nix
+++ b/home/bat/default.nix
@@ -1,4 +1,9 @@
-{pkgs, ...}: {
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}: {
   programs.bat = {
     enable = true;
 
@@ -13,4 +18,45 @@
       style = "auto";
     };
   };
+
+  programs.fish = lib.mkIf config.programs.fish.enable {
+    interactiveShellInit = ''
+      set -gx BATDIFF_USE_DELTA true
+    '';
+
+    functions = {
+      cat = {
+        wraps = "bat";
+        body = "bat $argv";
+      };
+
+      cath = {
+        wraps = "bat";
+        body = "bat --plain --language=help $argv";
+      };
+    };
+
+    shellAbbrs = {
+      B = {
+        position = "anywhere";
+        setCursor = true;
+        expansion = "% | bat";
+      };
+
+      "-h" = {
+        position = "anywhere";
+        expansion = "-h | cath";
+      };
+
+      "--help" = {
+        position = "anywhere";
+        expansion = "--help | cath";
+      };
+
+      help = {
+        position = "anywhere";
+        expansion = "help | cath";
+      };
+    };
+  };
 }