feat: Add overeager model setting and prompt for precise request handling

aider/coders/base_coder.py

@@ -1079,7 +1079,7 @@ class Coder:
     def fmt_system_prompt(self, prompt):
         if self.main_model.lazy:
             lazy_prompt = self.gpt_prompts.lazy_prompt
-        elif hasattr(self.main_model, "overager") and self.main_model.overager:
+        elif self.main_model.overeager:
             lazy_prompt = self.gpt_prompts.overeager_prompt
         else:
             lazy_prompt = ""

aider/coders/base_prompts.py

@@ -14,6 +14,8 @@ You NEVER leave comments describing code without implementing it!
 You always COMPLETELY IMPLEMENT the needed code!
 """
 
+    overeager_prompt = """Pay careful attention to the scope of the user's request. Do what they ask, but no more."""
+
     example_messages = []
 
     files_content_prefix = """I have *added these files to the chat* so you can go ahead and edit them.

aider/models.py

@@ -103,6 +103,7 @@ class ModelSettings:
     use_repo_map: bool = False
     send_undo_reply: bool = False
     lazy: bool = False
+    overeager: bool = False
     reminder: str = "user"
     examples_as_sys_msg: bool = False
     extra_params: Optional[dict] = None