fix assert used

core/dispatcher.py

@@ -489,7 +489,8 @@ class IssueTaskProcessor(TaskProcessor):
             return f"SKIP: Awaiting human reply on issue #{self.item.task_number} or PR."
 
         issue_info = self.item.task_info
-        assert isinstance(issue_info, IssueModel)
+        if not isinstance(issue_info, IssueModel):
+            raise TypeError("Expected task_info to be an IssueModel")
         title = issue_info.title
         issue_body = issue_info.body or "No description provided."
 
@@ -738,7 +739,8 @@ class AgentDispatcher:
 
     def _build_pr_mission(self, item: WorkItem) -> str:
         pr_info = item.task_info
-        assert isinstance(pr_info, PullRequestModel)
+        if not isinstance(pr_info, PullRequestModel):
+            raise TypeError("Expected task_info to be a PullRequestModel")
         processor = PRTaskProcessor(
             client=self._client,
             tools=self._tools,
@@ -751,7 +753,8 @@ class AgentDispatcher:
 
     def _build_issue_mission(self, item: WorkItem) -> str:
         issue_info = item.task_info
-        assert isinstance(issue_info, IssueModel)
+        if not isinstance(issue_info, IssueModel):
+            raise TypeError("Expected task_info to be an IssueModel")
         processor = IssueTaskProcessor(
             client=self._client,
             tools=self._tools,