diff --git a/src/langbot/pkg/plugin/connector.py b/src/langbot/pkg/plugin/connector.py
index 034dc94f..7ddb88e2 100644
--- a/src/langbot/pkg/plugin/connector.py
+++ b/src/langbot/pkg/plugin/connector.py
@@ -660,15 +660,6 @@ class PluginRuntimeConnector:
         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,
diff --git a/src/langbot/pkg/plugin/handler.py b/src/langbot/pkg/plugin/handler.py
index b90f51b1..c65a0056 100644
--- a/src/langbot/pkg/plugin/handler.py
+++ b/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:
diff --git a/src/langbot/pkg/rag/service/runtime.py b/src/langbot/pkg/rag/service/runtime.py
index 0de1ae88..1dc62bd5 100644
--- a/src/langbot/pkg/rag/service/runtime.py
+++ b/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.
diff --git a/uv.lock b/uv.lock
index d391baac..42aa794b 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2036,7 +2036,7 @@ dev = [
 
 [[package]]
 name = "langbot-plugin"
-version = "0.3.10"
+version = "0.3.11"
 source = { editable = "../langbot-plugin-sdk" }
 dependencies = [
     { name = "aiofiles" },
diff --git a/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx b/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx
index 9e2df54d..814669f0 100644
--- a/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx
+++ b/web/src/app/home/components/dynamic-form/DynamicFormComponent.tsx
@@ -26,6 +26,7 @@ import { Button } from '@/components/ui/button';
 import { Copy, Check, Globe, QrCode } from 'lucide-react';
 import { copyToClipboard } from '@/app/utils/clipboard';
 import { systemInfo } from '@/app/infra/http';
+import { parseDynamicFormItemType } from './DynamicFormItemConfig';
 
 /**
  * Resolve the value referenced by a `show_if.field` string.
@@ -196,14 +197,8 @@ function WebhookUrlField({
 /**
  * Normalize plugin manifest type names to frontend-compatible types
  */
-function normalizeItemType(type: string): string {
-  const typeMap: Record<string, string> = {
-    'select-llm-model': DynamicFormItemType.LLM_MODEL_SELECTOR,
-    'select-knowledge-bases': DynamicFormItemType.KNOWLEDGE_BASE_MULTI_SELECTOR,
-    number: DynamicFormItemType.FLOAT,
-    json: DynamicFormItemType.TEXT,
-  };
-  return typeMap[type] || type;
+function normalizeItemType(type: string): DynamicFormItemType {
+  return parseDynamicFormItemType(type);
 }
 
 export default function DynamicFormComponent({
diff --git a/web/src/app/home/components/dynamic-form/DynamicFormItemConfig.ts b/web/src/app/home/components/dynamic-form/DynamicFormItemConfig.ts
index 50ac578a..7785b576 100644
--- a/web/src/app/home/components/dynamic-form/DynamicFormItemConfig.ts
+++ b/web/src/app/home/components/dynamic-form/DynamicFormItemConfig.ts
@@ -41,6 +41,18 @@ export function isDynamicFormItemType(
 }
 
 export function parseDynamicFormItemType(value: string): DynamicFormItemType {
+  const typeMap: Record<string, DynamicFormItemType> = {
+    [DynamicFormItemType.SELECT_LLM_MODEL]:
+      DynamicFormItemType.LLM_MODEL_SELECTOR,
+    [DynamicFormItemType.SELECT_KNOWLEDGE_BASES]:
+      DynamicFormItemType.KNOWLEDGE_BASE_MULTI_SELECTOR,
+    [DynamicFormItemType.NUMBER]: DynamicFormItemType.FLOAT,
+    [DynamicFormItemType.JSON]: DynamicFormItemType.TEXT,
+  };
+  if (value in typeMap) {
+    return typeMap[value];
+  }
+
   return isDynamicFormItemType(value) ? value : DynamicFormItemType.UNKNOWN;
 }