chore: flake update

overlays/default.nix

@@ -59,4 +59,10 @@
       config.allowUnfree = true;
     };
   };
+
+  # Flatten llm-agents packages into top-level pkgs namespace.
+  # Takes system as parameter to avoid infinite recursion — overlays
+  # can't safely access final/prev.system when spreading attributes.
+  mkLlmAgentsOverlay = system: _final: _prev:
+    inputs.llm-agents.packages.${system} or {};
 }