diff --git a/lightrag/api/routers/document_routes.py b/lightrag/api/routers/document_routes.py
index c1666192..7b6f11c1 100644
--- a/lightrag/api/routers/document_routes.py
+++ b/lightrag/api/routers/document_routes.py
@@ -99,6 +99,37 @@ class DocsStatusesResponse(BaseModel):
     statuses: Dict[DocStatus, List[DocStatusResponse]] = {}
 
 
+class PipelineStatusResponse(BaseModel):
+    """Response model for pipeline status
+
+    Attributes:
+        autoscanned: Whether auto-scan has started
+        busy: Whether the pipeline is currently busy
+        job_name: Current job name (e.g., indexing files/indexing texts)
+        job_start: Job start time as ISO format string (optional)
+        docs: Total number of documents to be indexed
+        batchs: Number of batches for processing documents
+        cur_batch: Current processing batch
+        request_pending: Flag for pending request for processing
+        latest_message: Latest message from pipeline processing
+        history_messages: List of history messages
+    """
+
+    autoscanned: bool = False
+    busy: bool = False
+    job_name: str = "Default Job"
+    job_start: Optional[str] = None
+    docs: int = 0
+    batchs: int = 0
+    cur_batch: int = 0
+    request_pending: bool = False
+    latest_message: str = ""
+    history_messages: Optional[List[str]] = None
+
+    class Config:
+        extra = "allow"  # Allow additional fields from the pipeline status
+
+
 class DocumentManager:
     def __init__(
         self,
@@ -247,7 +278,7 @@ async def pipeline_enqueue_file(rag: LightRAG, file_path: Path) -> bool:
                 if global_args["main_args"].document_loading_engine == "DOCLING":
                     if not pm.is_installed("docling"):  # type: ignore
                         pm.install("docling")
-                    from docling.document_converter import DocumentConverter
+                    from docling.document_converter import DocumentConverter  # type: ignore
 
                     converter = DocumentConverter()
                     result = converter.convert(file_path)
@@ -266,7 +297,7 @@ async def pipeline_enqueue_file(rag: LightRAG, file_path: Path) -> bool:
                 if global_args["main_args"].document_loading_engine == "DOCLING":
                     if not pm.is_installed("docling"):  # type: ignore
                         pm.install("docling")
-                    from docling.document_converter import DocumentConverter
+                    from docling.document_converter import DocumentConverter  # type: ignore
 
                     converter = DocumentConverter()
                     result = converter.convert(file_path)
@@ -286,7 +317,7 @@ async def pipeline_enqueue_file(rag: LightRAG, file_path: Path) -> bool:
                 if global_args["main_args"].document_loading_engine == "DOCLING":
                     if not pm.is_installed("docling"):  # type: ignore
                         pm.install("docling")
-                    from docling.document_converter import DocumentConverter
+                    from docling.document_converter import DocumentConverter  # type: ignore
 
                     converter = DocumentConverter()
                     result = converter.convert(file_path)
@@ -307,7 +338,7 @@ async def pipeline_enqueue_file(rag: LightRAG, file_path: Path) -> bool:
                 if global_args["main_args"].document_loading_engine == "DOCLING":
                     if not pm.is_installed("docling"):  # type: ignore
                         pm.install("docling")
-                    from docling.document_converter import DocumentConverter
+                    from docling.document_converter import DocumentConverter  # type: ignore
 
                     converter = DocumentConverter()
                     result = converter.convert(file_path)
@@ -718,17 +749,33 @@ def create_document_routes(
             logger.error(traceback.format_exc())
             raise HTTPException(status_code=500, detail=str(e))
 
-    @router.get("/pipeline_status", dependencies=[Depends(optional_api_key)])
-    async def get_pipeline_status():
+    @router.get(
+        "/pipeline_status",
+        dependencies=[Depends(optional_api_key)],
+        response_model=PipelineStatusResponse,
+    )
+    async def get_pipeline_status() -> PipelineStatusResponse:
         """
         Get the current status of the document indexing pipeline.
 
         This endpoint returns information about the current state of the document processing pipeline,
-        including whether it's busy, the current job name, when it started, how many documents
-        are being processed, how many batches there are, and which batch is currently being processed.
+        including the processing status, progress information, and history messages.
 
         Returns:
-            dict: A dictionary containing the pipeline status information
+            PipelineStatusResponse: A response object containing:
+                - autoscanned (bool): Whether auto-scan has started
+                - busy (bool): Whether the pipeline is currently busy
+                - job_name (str): Current job name (e.g., indexing files/indexing texts)
+                - job_start (str, optional): Job start time as ISO format string
+                - docs (int): Total number of documents to be indexed
+                - batchs (int): Number of batches for processing documents
+                - cur_batch (int): Current processing batch
+                - request_pending (bool): Flag for pending request for processing
+                - latest_message (str): Latest message from pipeline processing
+                - history_messages (List[str], optional): List of history messages
+
+        Raises:
+            HTTPException: If an error occurs while retrieving pipeline status (500)
         """
         try:
             from lightrag.kg.shared_storage import get_namespace_data
@@ -746,7 +793,7 @@ def create_document_routes(
             if status_dict.get("job_start"):
                 status_dict["job_start"] = str(status_dict["job_start"])
 
-            return status_dict
+            return PipelineStatusResponse(**status_dict)
         except Exception as e:
             logger.error(f"Error getting pipeline status: {str(e)}")
             logger.error(traceback.format_exc())