Add caveman skill globally

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:

home-modules/dev.nix

@@ -60,16 +60,6 @@
       nodejs_24
       codex
       claude-code
-      (
-        # Wrapping opencode to set the OPENCODE_ENABLE_EXA environment variable
-        runCommand "opencode" {
-          buildInputs = [ makeWrapper ];
-        } ''
-          mkdir -p $out/bin
-          makeWrapper ${pkgs.opencode}/bin/opencode $out/bin/opencode \
-            --set OPENCODE_ENABLE_EXA "1"
-          ''
-      )
       winbox4
       amdgpu_top
       dua
@@ -128,5 +118,22 @@
         fi
       ''
     );
+
+    programs.opencode = {
+      enable = true;
+      package = (
+        # Wrapping opencode to set the OPENCODE_ENABLE_EXA environment variable
+        pkgs.runCommand "opencode" {
+          buildInputs = [ pkgs.makeWrapper ];
+        } ''
+          mkdir -p $out/bin
+          makeWrapper ${pkgs.opencode}/bin/opencode $out/bin/opencode \
+            --set OPENCODE_ENABLE_EXA "1"
+          ''
+      );
+      skills = with pkgs.skills; {
+        caveman = majiayu000."claude-skill-registry".caveman + "/";
+      };
+    };
   };
 }

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" ];

modules/system/zfs.nix

@@ -2,9 +2,8 @@
 
 {
   config = lib.mkIf config.boot.zfs.enabled {
-    # Set ARC max to 5% of physical RAM at boot
     systemd.services."zfs-arc-limit" = {
-      description = "Set ZFS ARC max to 5% of physical RAM";
+      description = "Set ZFS ARC max to 20% of physical RAM";
       # Ensure the module is loaded before we write to /sys
       after = [ "systemd-modules-load.service" ];
       # Run early, but it’s fine if ZFS has already imported; the limit still applies
@@ -15,8 +14,8 @@
         # Total RAM in kB
         mem_kb=$(awk '/MemTotal:/ {print $2}' /proc/meminfo)
         echo "DEBUG: Total RAM: $mem_kb kB"
-        # 5%, in bytes
+        # 20%, in bytes
-        arc_max_bytes=$(( mem_kb * 1024 / 100 * 5 ))
+        arc_max_bytes=$(( mem_kb * 1024 / 100 * 20 ))
         echo "DEBUG: Setting ZFS ARC max to: $arc_max_bytes bytes"
         param="/sys/module/zfs/parameters/zfs_arc_max"
         if [ -w "$param" ]; then