feat(hosts): add lightweight option for package management (#345)

* feat(hosts): add lightweight option to replace hostname-based package checks

Replace hardcoded hostname checks (zeta, spore) with a declarative lightweight
option in host definitions. This allows hosts to opt-out of heavy packages
(development tools, containers, javascript, graphite, jujutsu, file utilities,
media tools) independently of their hostname, making the configuration more
explicit and extensible.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

* feat(home): enable AI packages on all hosts

Move development.ai.enable out of the lightweight-gated block so
lightweight hosts (zeta, spore) also get AI packages.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Haiku 4.5 <noreply@anthropic.com>

Author: stackptr

flake.nix

@@ -90,6 +90,7 @@
             hostname = "zeta";
             system = "aarch64-linux";
             username = "mu";
+            lightweight = true;
           };
           glyph = mkNixosHost {
             hostname = "glyph";
@@ -100,6 +101,7 @@
             hostname = "spore";
             system = "x86_64-linux";
             username = "mu";
+            lightweight = true;
           };
         };
 

home/default.nix

@@ -2,7 +2,7 @@
   config,
   pkgs,
   lib,
-  hostname,
+  lightweight,
   ...
 }: {
   imports = [
@@ -16,6 +16,7 @@
 
   rc = lib.mkMerge [
     {
+      development.ai.enable = true;
       editor.enable = true;
       git.enable = true;
       ssh.enable = true;
@@ -26,9 +27,8 @@
       };
     }
 
-    (lib.mkIf (hostname != "spore" && hostname != "zeta") {
+    (lib.mkIf (!lightweight) {
       development = {
-        ai.enable = true;
         containers.enable = true;
         javascript.enable = true;
       };

lib/hosts.nix

@@ -23,6 +23,7 @@ inputs @ {
     hostname,
     system,
     showBatteryStatus,
+    lightweight ? false,
   }: let
     pkgs-stable = import nixpkgs-stable {inherit system;};
     hostHomePath = ./../hosts/${hostname}/home.nix;
@@ -44,14 +45,15 @@ inputs @ {
         ++ nixpkgs.lib.optionals (hostHomeConfig != null) [hostHomeConfig];
     };
     home-manager.extraSpecialArgs = {
-      inherit hostname llm-profile pkgs-stable showBatteryStatus;
+      inherit hostname lightweight llm-profile pkgs-stable showBatteryStatus;
     };
   };
 
   mkNixosHost = {
     hostname,
     system,
     username,
+    lightweight ? false,
   }:
     nixpkgs.lib.nixosSystem {
       inherit system;
@@ -68,7 +70,7 @@ inputs @ {
         agenix.nixosModules.default
         home-manager.nixosModules.home-manager
         (mkHomeManager {
-          inherit username hostname system;
+          inherit username hostname system lightweight;
           showBatteryStatus = false;
         })
         {
@@ -82,6 +84,7 @@ inputs @ {
   mkDarwinHost = {
     hostname,
     username,
+    lightweight ? false,
   }: let
     system = "aarch64-darwin";
   in
@@ -99,7 +102,7 @@ inputs @ {
         ./../hosts/${hostname}
         home-manager.darwinModules.home-manager
         (mkHomeManager {
-          inherit username hostname system;
+          inherit username hostname system lightweight;
           showBatteryStatus = true;
         })
         {