feat: install ai agents via llm-agents.nix

home/base/gui/dev-tools.nix

@@ -1,4 +1,4 @@
-{ pkgs, pkgs-master, ... }:
+{ pkgs, llm-agents, ... }:
 {
   home.packages =
     with pkgs;
@@ -7,11 +7,15 @@
       wireshark # network analyzer
     ]
     # AI Agent Tools
-    ++ (with pkgs-master; [
+    ++ (with llm-agents.packages.${pkgs.stdenv.hostPlatform.system}; [
+      # Agents
       codex
       cursor-cli
       claude-code
       gemini-cli
       opencode
+
+      # Utilities
+      rtk # CLI proxy that reduces LLM token consumption
     ]);
 }