diff --git a/examples/smart_minion/code_contests/evalute_code_contests_hard.py b/examples/smart_minion/code_contests/evalute_code_contests_hard.py
index 65ee48b4..69d8eef5 100644
--- a/examples/smart_minion/code_contests/evalute_code_contests_hard.py
+++ b/examples/smart_minion/code_contests/evalute_code_contests_hard.py
@@ -242,8 +242,8 @@ async def solve_question(item):
     )
     return answer
 
-#model = "gpt-4o-mini"
-model = "default"
+model = "gpt-4o"
+#model = "default"
 
 llm = create_llm_provider(config.models.get(model))
 cost_manager = CostManager()
@@ -253,6 +253,7 @@ async def main():
     validation_data = load_dataset("deepmind/code_contests", split='valid')
     test_data = load_dataset("deepmind/code_contests", split='test')
     validation_data = [validation_data[1]]
+    #validation_data = [validation_data[0]]
     correct, count, matched_ids, mismatched_ids = await evaluate_dataset(
         validation_data, run_filename=f"run_code_contests_{model}_hard.json", continue_process=True, concurrency_count=1
     )
diff --git a/minion/configs/config.py b/minion/configs/config.py
index 3a85897f..72d915a7 100644
--- a/minion/configs/config.py
+++ b/minion/configs/config.py
@@ -34,6 +34,7 @@ class ImageDetail(str, Enum):
 class LLMConfig(BaseModel):
     api_type: str = "openai"
     api_key: str
+    api_version: Optional[str] = None
     # base_url: Optional[HttpUrl] = None
     base_url: Optional[str] = None
     model: str
diff --git a/minion/main/improve.py b/minion/main/improve.py
index 86b12a32..e4abd96f 100644
--- a/minion/main/improve.py
+++ b/minion/main/improve.py
@@ -1,7 +1,8 @@
 from abc import ABC, abstractmethod
 from minion.actions.lmp_action_node import LmpActionNode
 from minion.main.minion import Minion, register_improver_minion
-from minion.main.prompt import IMPROVE_CODE_PROMPT
+from minion.main.prompt import IMPROVE_CODE_PROMPT, IMPROVE_PROMPT
+from minion.utils.template import render_template_with_variables
 
 class ImproverMinion(Minion):
     """所有 improver minion 的基类"""
@@ -15,26 +16,26 @@ async def execute(self):
 
 @register_improver_minion(name="feedback")
 class FeedbackMinion(ImproverMinion):
+    """基于反馈进行通用内容改进的 Minion"""
     async def execute(self):
-        # 使用测试用例来改进代码
-        test_cases = self.worker.input.metadata.get("test_cases", [])
-        ai_test_cases = self.worker.input.metadata.get("ai_test_cases", [])
-        
+        """基于反馈进行通用内容改进的执行方法"""
         # 构建改进提示
-        prompt = IMPROVE_CODE_PROMPT.format(
-            code=self.worker.answer,
-            test_cases=test_cases,
-            ai_test_cases=ai_test_cases,
-            entry_point=self.worker.input.entry_point
+        prompt = render_template_with_variables(
+            template_str=IMPROVE_PROMPT,
+            input={
+                "answer": self.worker.input.answer, #todo, maybe stateful agent connections?
+                "feedback": self.worker.input.feedback,
+                **self.worker.input.__dict__  # 包含其他上下文信息
+            }
         )
         
-        # 使用 LLM 改进代码
+        # 使用 LLM 改进内容
         node = LmpActionNode(self.brain.llm)
-        improved_code = await node.execute(prompt)
+        improved_answer = await node.execute(prompt)
         
         # 更新 worker 的答案
-        self.worker.answer = improved_code
-        return improved_code
+        self.worker.answer = improved_answer
+        return improved_answer
 
 @register_improver_minion(name="reasoning")
 class ReasoningMinion(ImproverMinion):
diff --git a/minion/main/prompt.py b/minion/main/prompt.py
index 79301f28..700ca13c 100644
--- a/minion/main/prompt.py
+++ b/minion/main/prompt.py
@@ -640,6 +640,26 @@
 Reasoning:
 """
 
+IMPROVE_PROMPT = f"""Given the following problem details:
+
+{ASK_PROMPT_JINJA}
+{ASK_ADDITIONAL_INFO_JINJA}
+
+Current answer:
+{{ input.answer }}
+
+Feedback for improvement:
+{{ input.feedback }}
+
+Based on the above feedback, please provide an improved answer. The improved answer should:
+1. Address all points mentioned in the feedback
+2. Maintain the strengths of the original answer
+3. Be clear, accurate, and well-structured
+4. Be complete and self-contained
+
+Return only the improved answer without any explanations or comments.
+"""
+
 IMPROVE_CODE_PROMPT = """You are a code improvement expert. Your task is to improve the given code based on the test cases.
 
 Current code:
diff --git a/minion/main/worker.py b/minion/main/worker.py
index ab92e466..87cb8e63 100644
--- a/minion/main/worker.py
+++ b/minion/main/worker.py
@@ -55,7 +55,7 @@
 )
 from minion.main.symbol_table import Symbol
 from minion.main.task_graph import convert_tasks_to_graph
-from minion.utils.utils import most_similar_minion
+from minion.utils.utils import most_similar_minion, camel_case_to_snake_case
 from minion.actions.lmp_action_node import LmpActionNode
 from minion.models.schemas import (
     MetaPlan,
@@ -746,7 +746,7 @@ async def get_minion_class_and_name(self):
         if self.input.execution_state.chosen_minion:
             # 从上次状态恢复
             name = self.input.execution_state.chosen_minion
-            klass = MINION_REGISTRY.get(name, CotMinion)
+            klass = MINION_REGISTRY.get(camel_case_to_snake_case(name), CotMinion) #todo: tmp fix here, actually is other place's bug to store "CotMinion"
             return klass, name
         
         # 新的执行流程