Re-imagined and re-written Debug tool. Instead of prompting Claude to perform initial analysis (and hoping it did), the tool now works through the debug process as an 'investigation', encouraging Claud to gather its 'findings' / 'hypothesis', stepping back as needed, collecting files it's gone through and keeping track of files relevant to the issue at hand. This structured investiion is then passed to the other model with far greater insight than the original debug tool ever could.

Improved prompts, guard against overengineering and flag that as an antipattern

tests/test_auto_model_planner_fix.py

@@ -198,13 +198,20 @@ class TestAutoModelPlannerFix:
         Verify that other tools still properly require model resolution.
 
         This ensures our fix doesn't break existing functionality.
+        Note: Debug tool now manages its own model calls like planner.
         """
         from tools.analyze import AnalyzeTool
         from tools.chat import ChatTool
         from tools.debug import DebugIssueTool
 
         # Test various tools still require models
-        tools_requiring_models = [ChatTool(), DebugIssueTool(), AnalyzeTool()]
+        tools_requiring_models = [ChatTool(), AnalyzeTool()]
 
         for tool in tools_requiring_models:
             assert tool.requires_model() is True, f"{tool.get_name()} should require model resolution"
+
+        # Test tools that manage their own model calls
+        tools_managing_own_models = [DebugIssueTool()]
+
+        for tool in tools_managing_own_models:
+            assert tool.requires_model() is False, f"{tool.get_name()} should manage its own model calls"