diff --git a/lightrag/kg/json_kv_impl.py b/lightrag/kg/json_kv_impl.py
index 2fb753fe..f19463ce 100644
--- a/lightrag/kg/json_kv_impl.py
+++ b/lightrag/kg/json_kv_impl.py
@@ -51,6 +51,7 @@ Usage:
 import asyncio
 import os
 from dataclasses import dataclass
+from typing import Any, Union
 
 from lightrag.utils import (
     logger,
@@ -68,7 +69,7 @@ class JsonKVStorage(BaseKVStorage):
     def __post_init__(self):
         working_dir = self.global_config["working_dir"]
         self._file_name = os.path.join(working_dir, f"kv_store_{self.namespace}.json")
-        self._data = load_json(self._file_name) or {}
+        self._data: dict[str, Any] = load_json(self._file_name) or {}
         self._lock = asyncio.Lock()
         logger.info(f"Load KV {self.namespace} with {len(self._data)} data")
 
@@ -78,15 +79,13 @@ class JsonKVStorage(BaseKVStorage):
     async def index_done_callback(self):
         write_json(self._data, self._file_name)
 
-    async def get_by_id(self, id):
+    async def get_by_id(self, id: str):
         return self._data.get(id, None)
 
-    async def get_by_ids(self, ids, fields=None):
-        if fields is None:
-            return [self._data.get(id, None) for id in ids]
+    async def get_by_ids(self, ids: list[str]):    
         return [
             (
-                {k: v for k, v in self._data[id].items() if k in fields}
+                {k: v for k, v in self._data[id].items() }
                 if self._data.get(id, None)
                 else None
             )
@@ -96,7 +95,7 @@ class JsonKVStorage(BaseKVStorage):
     async def filter_keys(self, data: list[str]) -> set[str]:
         return set([s for s in data if s not in self._data])
 
-    async def upsert(self, data: dict[str, dict]):
+    async def upsert(self, data: dict[str, dict[str, Any]]):
         left_data = {k: v for k, v in data.items() if k not in self._data}
         self._data.update(left_data)
         return left_data
@@ -104,31 +103,8 @@ class JsonKVStorage(BaseKVStorage):
     async def drop(self):
         self._data = {}
 
-    async def filter(self, filter_func):
-        """Filter key-value pairs based on a filter function
-
-        Args:
-            filter_func: The filter function, which takes a value as an argument and returns a boolean value
-
-        Returns:
-            Dict: Key-value pairs that meet the condition
-        """
-        result = {}
-        async with self._lock:
-            for key, value in self._data.items():
-                if filter_func(value):
-                    result[key] = value
-        return result
-
-    async def delete(self, ids: list[str]):
-        """Delete data with specified IDs
-
-        Args:
-            ids: List of IDs to delete
-        """
-        async with self._lock:
-            for id in ids:
-                if id in self._data:
-                    del self._data[id]
-            await self.index_done_callback()
-            logger.info(f"Successfully deleted {len(ids)} items from {self.namespace}")
+    async def get_by_status_and_ids(
+        self, status: str
+    ) -> Union[list[dict[str, Any]], None]:
+        result = [v for _, v in self._data.items() if v["status"] == status]
+        return result if result else None