enable kanata service

nixos/configurations/Tytonidae/default.nix

@@ -30,6 +30,7 @@
       openssh.enable = true;
       steam.enable = true;
       tailscale.enable = true;
+      kanata.enable = true;
     };
     gui.enabled = "cosmic";
   };

nixos/modules/default.nix

@@ -24,6 +24,7 @@
       ./gui
       ./steam.nix
       ./tailscale.nix
+      ./kanata.nix
     ];
 
   config = {

nixos/modules/kanata.nix

@@ -0,0 +1,52 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  cfg = config.youthlic.programs.kanata;
+in
+{
+  options = {
+    youthlic.programs.kanata = {
+      enable = lib.mkEnableOption "kanata";
+    };
+  };
+  config = lib.mkIf cfg.enable {
+    boot.kernelModules = [ "uinput" ];
+    hardware.uinput.enable = true;
+    services.kanata = {
+      enable = true;
+      package = pkgs.kanata-with-cmd;
+      keyboards.default = {
+        extraDefCfg = ''
+          process-unmapped-keys no
+        '';
+        config = ''
+          #|
+              Kanata
+
+              CapsLock tap to Esc
+              CapsLock hold to Ctrl
+          |#
+          ;; default keyboard layout
+          (defsrc
+              caps  ;; type → esc, hold caps → ctrl
+              esc  ;; type esc → caps, hold esc → esc
+          )
+
+          (deflayer default
+              @cac
+              @esc-behavior
+          )
+
+          (defalias
+              cac (tap-hold 190 190 esc lctrl)  ;; hold CapsLock → Esc, press CapsLock → LCtrl
+              esc-behavior (tap-hold 190 190 caps esc)  ;; hold Esc → CapsLock, press Esc → Esc
+          )
+        '';
+      };
+    };
+  };
+}