add screenshot instructions
diff --git a/pkgs/dart_mcp/example/workflow_chat/lib/services/gemini_config.dart b/pkgs/dart_mcp/example/workflow_chat/lib/services/gemini_config.dart
index 529b547..5a0fdb1 100644
--- a/pkgs/dart_mcp/example/workflow_chat/lib/services/gemini_config.dart
+++ b/pkgs/dart_mcp/example/workflow_chat/lib/services/gemini_config.dart
@@ -48,10 +48,16 @@
3) Check for runtime errors and fix them
4) Ensure that all code is formatted properly
5) Hot reload the changes to the running app
+6) If you made a visual change, take a screenshot and analyze it to validate the
+ change was correct.
If, while executing your plan, you end up skipping steps because they are no
longer applicable, explain why you are skipping them.
+If the user asks you to do something with the selected widget, then always take
+a screenshot after altering the selected widget and validate that you changed
+the correct thing, you should see a selection box around the selected widget.
+
When you are writing dart code, do not escape `\$` signs with a backslash, these
are string interpolations and that will break them.
''');
