diff --git a/home/david/configurations/Tytonidae/default.nix b/home/david/configurations/Tytonidae/default.nix
index 7e6dc8c..f66a3c6 100644
--- a/home/david/configurations/Tytonidae/default.nix
+++ b/home/david/configurations/Tytonidae/default.nix
@@ -9,10 +9,8 @@
 {
   imports = [
     ./starship
-    ./fish
     ./firefox.nix
     ./foot
-    ./ghostty
     ./niri
     ./zed.nix
   ];
@@ -25,6 +23,9 @@
       name = "ulic-youthlic";
       signKey = "C6FCBD7F49E1CBBABD6661F7FC02063F04331A95";
     };
+    fish.enable = true;
+    bash.enable = true;
+    ghostty.enable = true;
   };
 
   xdg.userDirs = {
diff --git a/home/david/configurations/Tytonidae/fish/default.nix b/home/david/configurations/Tytonidae/fish/default.nix
deleted file mode 100644
index 5538972..0000000
--- a/home/david/configurations/Tytonidae/fish/default.nix
+++ /dev/null
@@ -1,54 +0,0 @@
-{ ... }:
-{
-  programs = {
-    bash = {
-      enable = true;
-    };
-    fish = {
-      enable = true;
-      functions = {
-        __fish_command_not_found_handler = {
-          body = "__fish_default_command_not_found_handler $argv[1]";
-          onEvent = "fish_command_not_found";
-        };
-        fish_greeting = {
-          body = ''
-            fastfetch
-          '';
-        };
-      };
-    };
-    fastfetch.enable = true;
-    starship = {
-      enableFishIntegration = true;
-      enable = true;
-    };
-    zoxide = {
-      enableFishIntegration = true;
-      enable = true;
-    };
-    yazi = {
-      enableFishIntegration = true;
-      enable = true;
-    };
-    fzf = {
-      enableFishIntegration = true;
-      enable = true;
-    };
-    eza = {
-      enableFishIntegration = true;
-      enable = true;
-    };
-    # zellij = {
-    #   enable = true;
-    #   enableFishIntegration = true;
-    # };
-    direnv = {
-      enable = true;
-      nix-direnv.enable = true;
-    };
-  };
-  services = {
-    gpg-agent.enableFishIntegration = true;
-  };
-}
diff --git a/home/david/configurations/Tytonidae/ghostty/config/config b/home/david/configurations/Tytonidae/ghostty/config/config
deleted file mode 100644
index 2dbade5..0000000
--- a/home/david/configurations/Tytonidae/ghostty/config/config
+++ /dev/null
@@ -1,19 +0,0 @@
-font-family = FiraCode Nerd Font
-font-feature = "calt=1"
-font-feature = "clig=1"
-font-feature = "liga=1"
-font-feature = "cv01"
-font-feature = "cv02"
-font-feature = "cv06"
-font-feature = "zero"
-font-feature = "onum"
-font-feature = "cv17"
-font-feature = "ss05"
-font-feature = "ss03"
-font-feature = "cv16"
-font-feature = "cv31"
-font-feature = "cv29"
-font-feature = "cv30"
-font-size = 17
-theme = ayu
-background-opacity = 0.8
diff --git a/home/david/configurations/Tytonidae/ghostty/default.nix b/home/david/configurations/Tytonidae/ghostty/default.nix
deleted file mode 100644
index 28dae3f..0000000
--- a/home/david/configurations/Tytonidae/ghostty/default.nix
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  config,
-  ...
-}:
-{
-  xdg.configFile."ghostty/config" = {
-    source = config.lib.file.mkOutOfStoreSymlink ./config/config;
-  };
-}
diff --git a/home/modules/default.nix b/home/modules/default.nix
index 6969b1e..e289214 100644
--- a/home/modules/default.nix
+++ b/home/modules/default.nix
@@ -9,6 +9,8 @@
       ./helix
       ./gpg
       ./git.nix
+      ./shell
+      ./ghostty.nix
     ];
 
   options = {
@@ -21,4 +23,10 @@
       '';
     };
   };
+  config = {
+    programs.direnv = {
+      enable = true;
+      nix-direnv.enable = true;
+    };
+  };
 }
diff --git a/home/modules/ghostty.nix b/home/modules/ghostty.nix
new file mode 100644
index 0000000..f884d23
--- /dev/null
+++ b/home/modules/ghostty.nix
@@ -0,0 +1,61 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+{
+  options = {
+    youthlic.programs.ghostty = {
+      enable = lib.mkOption {
+        type = lib.types.bool;
+        example = false;
+        default = true;
+        description = ''
+          whether enable ghostty
+        '';
+      };
+    };
+  };
+  config =
+    let
+      cfg = config.youthlic.programs.ghostty;
+    in
+    (lib.mkIf cfg.enable {
+      programs.ghostty = lib.mkMerge [
+        {
+          enable = true;
+          package = pkgs.ghostty;
+          settings = {
+            font-family = "FiraCode Nerd Font";
+            font-feature = [
+              "calt=1"
+              "clig=1"
+              "liga=1"
+              "cv01"
+              "cv02"
+              "cv06"
+              "zero"
+              "onum"
+              "cv17"
+              "ss05"
+              "ss03"
+              "cv16"
+              "cv31"
+              "cv29"
+              "cv30"
+            ];
+            font-size = 17;
+            theme = "ayu";
+            background-opacity = 0.8;
+          };
+        }
+        (lib.mkIf config.youthlic.programs.fish.enable {
+          enableFishIntegration = true;
+        })
+        (lib.mkIf config.youthlic.programs.bash.enable {
+          enableBashIntegration = true;
+        })
+      ];
+    });
+}
diff --git a/home/modules/gpg/default.nix b/home/modules/gpg/default.nix
index 39391eb..c811e58 100644
--- a/home/modules/gpg/default.nix
+++ b/home/modules/gpg/default.nix
@@ -22,11 +22,19 @@
       cfg = config.youthlic.programs.gpg;
     in
     lib.mkIf cfg.enable {
-      services.gpg-agent = {
-        enable = true;
-        enableSshSupport = true;
-        pinentryPackage = pkgs.pinentry-all;
-      };
+      services.gpg-agent = lib.mkMerge [
+        {
+          enable = true;
+          enableSshSupport = true;
+          pinentryPackage = pkgs.pinentry-all;
+        }
+        (lib.mkIf config.youthlic.programs.fish.enable {
+          enableFishIntegration = true;
+        })
+        (lib.mkIf config.youthlic.programs.bash.enable {
+          enableBashIntegration = true;
+        })
+      ];
       programs.gpg = {
         enable = true;
         mutableKeys = true;
diff --git a/home/modules/shell/default.nix b/home/modules/shell/default.nix
new file mode 100644
index 0000000..f8369b9
--- /dev/null
+++ b/home/modules/shell/default.nix
@@ -0,0 +1,91 @@
+{ config, lib, ... }:
+let
+  inherit (lib) mkOption mkIf mkMerge;
+  inherit (lib.types) bool;
+  fish-cfg = config.youthlic.programs.fish;
+  bash-cfg = config.youthlic.programs.bash;
+  cfg-helper =
+    conf:
+    mkMerge [
+      conf
+      (mkIf fish-cfg.enable {
+        enableFishIntegration = true;
+      })
+      (mkIf bash-cfg.enable {
+        enableBashIntegration = true;
+      })
+    ];
+in
+{
+  options = {
+    youthlic.programs = {
+      fish = {
+        enable = mkOption {
+          type = bool;
+          default = true;
+          description = ''
+            whether to use fish shell
+          '';
+          example = false;
+        };
+      };
+      bash = {
+        enable = mkOption {
+          type = bool;
+          default = true;
+          description = ''
+            whether to use bash shell
+          '';
+          example = false;
+        };
+      };
+    };
+  };
+  config = mkMerge [
+    {
+      programs = {
+        starship = cfg-helper {
+          enable = true;
+        };
+        zoxide = cfg-helper {
+          enable = true;
+        };
+        yazi = cfg-helper {
+          enable = true;
+        };
+        fzf = cfg-helper {
+          enable = true;
+        };
+        eza = cfg-helper {
+          enable = true;
+        };
+      };
+    }
+    (mkIf fish-cfg.enable {
+      programs = {
+        fish = {
+          enable = true;
+          functions = {
+            __fish_command_not_found_handler = {
+              body = "__fish_default_command_not_found_handler $argv[1]";
+              onEvent = "fish_command_not_found";
+            };
+            fish_greeting = {
+              body = ''
+                fastfetch
+              '';
+            };
+          };
+        };
+        fastfetch.enable = true;
+      };
+    })
+    (mkIf bash-cfg.enable {
+      programs = {
+        bash = {
+          enable = true;
+        };
+      };
+    })
+  ];
+}