Make antigravity-cli optional

Missing from nixos-26.05

legacy/.gemini/config/mcp_config.json

@@ -8,6 +8,14 @@
         "--"
       ]
     },
+    "gitea": {
+      "command": "nix",
+      "args": [
+        "run",
+        "nixpkgs#gitea-mcp-server",
+        "--"
+      ]
+    },
     "ha": {
       "command": "nix",
       "args": [

modules/home/common.nix

@@ -9,12 +9,14 @@
   home.username = primaryUser;
 
   nixpkgs.config.allowUnfree = true;
-  home.packages = with pkgs; [
-    stow
-    wget
-    antigravity-cli
-    yubikey-manager
-  ];
+  home.packages =
+    with pkgs;
+    [
+      stow
+      wget
+      yubikey-manager
+    ]
+    ++ lib.optional (pkgs ? antigravity-cli) antigravity-cli;
 
   home.activation.stowLegacy = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
     if [ -d "$HOME/dotfiles/legacy" ]; then

modules/nixos/jailed-agy.nix

@@ -46,6 +46,8 @@ let
 in
 {
   options.programs.jailed-agy = {
+    enable = lib.mkEnableOption "jailed-agy wrapper";
+
     extraPackages = lib.mkOption {
       type = lib.types.listOf lib.types.package;
       default = [ ];
@@ -53,7 +55,7 @@ in
     };
   };
 
-  config = {
+  config = lib.mkIf config.programs.jailed-agy.enable {
     environment.systemPackages = [
       (jail "jailed-agy" pkgs.antigravity-cli (
         with jail.combinators;