diff --git a/docutranslate/core/schemas.py b/docutranslate/core/schemas.py
index 4aa69d0..0a9c71e 100644
--- a/docutranslate/core/schemas.py
+++ b/docutranslate/core/schemas.py
@@ -25,6 +25,13 @@ from docutranslate.agents.agent import ThinkingMode
 from docutranslate.agents.thinking.thinking_factory import ProviderType
 from docutranslate.translator import default_params
 
+# --- 公共类型定义 ---
+WorkflowType = Literal[
+    "auto", "markdown_based", "txt", "json", "xlsx", "docx",
+    "srt", "epub", "html", "ass", "pptx"
+]
+InsertMode = Literal["replace", "append", "prepend"]
+
 
 class GlossaryAgentConfigPayload(BaseModel):
     base_url: str = Field(
diff --git a/docutranslate/sdk.py b/docutranslate/sdk.py
index df0c16c..a376ecd 100644
--- a/docutranslate/sdk.py
+++ b/docutranslate/sdk.py
@@ -10,24 +10,14 @@ from typing import Optional, Literal, Dict, Any, List, Union
 
 from pydantic import TypeAdapter
 
-from docutranslate.core.schemas import TranslatePayload, GlossaryAgentConfigPayload
+from docutranslate.agents.agent import ThinkingMode
+from docutranslate.agents.provider import ProviderType
+
+from docutranslate.core.schemas import TranslatePayload, GlossaryAgentConfigPayload, WorkflowType, InsertMode
 from docutranslate.core.factory import create_workflow_from_payload
 from docutranslate.translator import default_params
 from docutranslate.global_values.conditional_import import DOCLING_EXIST
 
-# --- 类型定义 ---
-WorkflowType = Literal[
-    "auto", "markdown_based", "txt", "json", "xlsx", "docx",
-    "srt", "epub", "html", "ass", "pptx"
-]
-ThinkingMode = Literal["default", "enable", "disable"]
-InsertMode = Literal["replace", "append", "prepend"]
-ProviderType = Literal[
-    "ollama", "open.bigmodel.cn", "dashscope.aliyuncs.com",
-    "ark.cn-beijing.volces.com", "generativelanguage.googleapis.com",
-    "api.siliconflow.cn", "api.302.ai"
-]
-
 # --- 映射配置 ---
 _WORKFLOW_MAPPINGS = {
     "markdown_based": {"save": "save_as_markdown_zip", "export": "export_to_markdown_zip"},
@@ -92,7 +82,7 @@ class TranslationResult:
         return self._workflow
 
 
-class DocuTranslate:
+class Client:
     """
     DocuTranslate SDK。
     """