fix(rag): align knowledge engine plugin actions

src/langbot/pkg/plugin/connector.py

@@ -839,15 +839,6 @@ class PluginRuntimeConnector(ManagedRuntimeConnector):
         async for ret in gen:
             yield ret
 
-    # KnowledgeRetriever methods
-    async def list_knowledge_retrievers(self, bound_plugins: list[str] | None = None) -> list[dict[str, Any]]:
-        """List all available KnowledgeRetriever components."""
-        if not self.is_enable_plugin:
-            return []
-
-        retrievers_data = await self.handler.list_knowledge_retrievers(include_plugins=bound_plugins)
-        return retrievers_data
-
     async def retrieve_knowledge(
         self,
         plugin_author: str,

src/langbot/pkg/plugin/handler.py

@@ -979,7 +979,7 @@ class RuntimeConnectionHandler(handler.Handler):
             except Exception as e:
                 return _make_rag_error_response(e, 'VectorStoreError', collection_id=collection_id)
 
-        @self.action(PluginToRuntimeAction.GET_KNOWLEDEGE_FILE_STREAM)
+        @self.action(PluginToRuntimeAction.GET_KNOWLEDGE_FILE_STREAM)
         async def get_knowledge_file_stream(data: dict[str, Any]) -> handler.ActionResponse:
             storage_path = data['storage_path']
             try:

src/langbot/pkg/rag/service/runtime.py

@@ -107,7 +107,7 @@ class RAGRuntimeService:
         )
 
     async def get_file_stream(self, storage_path: str) -> bytes:
-        """Handle GET_KNOWLEDEGE_FILE_STREAM action.
+        """Handle GET_KNOWLEDGE_FILE_STREAM action.
 
         Uses the storage manager abstraction to load file content,
         regardless of the underlying storage provider.