hosts/argon/configuration.nix

@@ -25,6 +25,7 @@
     ../../modules/nixos/steam.nix
     ../../modules/nixos/thunar.nix
     ../../modules/nixos/users.nix
+    ../../modules/nixos/vial.nix
   ];
 
   # set hostname

hosts/neon/configuration.nix

@@ -21,6 +21,7 @@
     ../../modules/nixos/settings.nix
     ../../modules/nixos/steam.nix
     ../../modules/nixos/users.nix
+    ../../modules/nixos/vial.nix
   ];
 
   # set hostname

modules/nixos/packages.nix

@@ -35,6 +35,7 @@
     tree
     unzip
     usbutils
+    vial
     vim
     wget
     which

modules/nixos/vial.nix

@@ -0,0 +1,13 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # Vial-capable keyboards (lily58 pro r2g) expose a second, non-keyboard raw
+  # HID interface that vial.rocks drives over WebHID. Its /dev/hidraw* node is
+  # root-only by default, so chromium cannot open the device without this rule.
+  services.udev.extraRules = ''
+    # Vial firmware advertises itself through a magic USB serial, so this
+    # matches any vial board rather than just the lily58. uaccess hands the
+    # device to whoever owns the active seat, no group membership needed.
+    KERNEL=="hidraw*", SUBSYSTEM=="hidraw", ATTRS{serial}=="*vial:f64c2b3c*", TAG+="uaccess"
+  '';
+}