Declare agent-core schemastery runtime dependency

packages/core/agent-core/package.json

@@ -46,8 +46,7 @@
     "@deepseek-ai/dsh-system-prompt": "workspace:^",
     "@deepseek-ai/dsh-tool-bash": "workspace:^",
     "@deepseek-ai/dsh-tools": "workspace:^",
-    "cordis": "^4.0.0-rc.6",
-    "schemastery": "^3.18.0"
+    "cordis": "^4.0.0-rc.6"
   },
   "dependencies": {
     "schemastery": "^3.18.0"