diff --git a/model_tools.py b/model_tools.py
index b4aec821..18eaa637 100644
--- a/model_tools.py
+++ b/model_tools.py
@@ -196,6 +196,7 @@ def _discover_tools():
             "tools.send_message_tool",
             "tools.honcho_tools",
             "tools.homeassistant_tool",
+            "tools.nexus_architect",
         ]
         import importlib
         for mod_name in _modules:
diff --git a/toolsets.py b/toolsets.py
index ad762555..85860389 100644
--- a/toolsets.py
+++ b/toolsets.py
@@ -208,6 +208,12 @@ TOOLSETS = {
         "includes": []
     },
 
+    "nexus_architect": {
+        "description": "Autonomous 3D world generation for Three.js Nexus",
+        "tools": ["nexus_design_room", "nexus_create_portal", "nexus_add_lighting", "nexus_validate_scene", "nexus_export_scene", "nexus_get_summary"],
+        "includes": []
+    },
+
 
     # Scenario-specific toolsets