add nix-skills flake input

flake.lock

@@ -253,6 +253,26 @@
         "type": "github"
       }
     },
+    "nix-skills": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1775452536,
+        "narHash": "sha256-1MjzL/U5OtALBmsel4YHVSK9jr2c/YP4eXfi7lA5C+o=",
+        "owner": "sudosubin",
+        "repo": "nix-skills",
+        "rev": "c2d1958a5cdd7ee83f552c046fbc7cb43e8171e4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "sudosubin",
+        "repo": "nix-skills",
+        "type": "github"
+      }
+    },
     "nix-sweep": {
       "inputs": {
         "cf": "cf",
@@ -404,6 +424,7 @@
         "home-manager": "home-manager",
         "lanzaboote": "lanzaboote",
         "nix-flatpak": "nix-flatpak",
+        "nix-skills": "nix-skills",
         "nix-sweep": "nix-sweep",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs",

flake.nix

@@ -39,6 +39,10 @@
       inputs.nixpkgs.follows = "nixpkgs";
       inputs.linux-ntfs.url = "github:Lumpiasty/linux-ntfs/main";
     };
+    nix-skills = {
+      url = "github:sudosubin/nix-skills";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
   
   outputs = { self, nixos-hardware, ... }@inputs:

lib/mkNixosSystem.nix

@@ -10,6 +10,7 @@
   peerix,
   acer-wmi-ext,
   ntfsplus,
+  nix-skills,
   ...
 }:
 hardwareConfig: hostConfig:
@@ -26,6 +27,7 @@ nixpkgs.lib.nixosSystem {
       nixpkgs.overlays = [
         claude-code.overlays.default
         acer-wmi-ext.overlays.default
+        nix-skills.overlays.default
       ];
       nix.settings = {
         substituters = [ "https://claude-code.cachix.org" ];