diff --git a/app/api/skill_gap.py b/app/api/skill_gap.py
index eb47498..3349bd4 100644
--- a/app/api/skill_gap.py
+++ b/app/api/skill_gap.py
@@ -69,6 +69,7 @@ async def ai_edit_customize_resume(param: AiEditParam):
     async for session in get_db():
         service = SkillGapService(session)
         result = await service.ai_edit_customize_resume(
-            user_id, param.job_id, param.instruction, param.chat_history,
+            user_id, param.job_id, param.instruction,
+            [msg.model_dump() for msg in param.chat_history],
         )
     return result
diff --git a/app/schemas/skill_gap.py b/app/schemas/skill_gap.py
index 20e4e3a..04b40a8 100644
--- a/app/schemas/skill_gap.py
+++ b/app/schemas/skill_gap.py
@@ -25,10 +25,18 @@ class CustomizeResumeParam(BaseModel):
     add_skills: list[str] = Field(default_factory=list, alias="addSkills")
 
 
+ChatRole = Literal["user", "assistant"]
+
+
+class ChatMessage(BaseModel):
+    role: ChatRole
+    content: str
+
+
 class AiEditParam(BaseModel):
     job_id: int = Field(..., alias="jobId")
     instruction: str = Field(...)
-    chat_history: list[dict] = Field(default_factory=list, alias="chatHistory")
+    chat_history: list[ChatMessage] = Field(default_factory=list, alias="chatHistory")
 
 
 # ===== Redis 缓存子模型 =====
diff --git a/app/services/skill_gap_service.py b/app/services/skill_gap_service.py
index fa33d9a..be5bafc 100644
--- a/app/services/skill_gap_service.py
+++ b/app/services/skill_gap_service.py
@@ -200,7 +200,7 @@ class SkillGapService:
     # ===== AI 对话编辑 =====
 
     async def ai_edit_customize_resume(self, user_id: int, job_id: int,
-                                       instruction: str, chat_history: list[dict]) -> dict:
+                                       instruction: str, chat_history: list) -> dict:
         """AI 对话式编辑定制简历"""
         # 1. 取当前定制简历
         key = f"{CUSTOMIZE_RESUME_KEY_PREFIX}{user_id}"