- Track lastGeneratedXml to detect user modifications
- Only send XML context when needed (saves tokens)
- Fix cached response streaming to include tool output
- Add debug logging for model messages and steps
- Enable multi-step tool execution with maxSteps: 5
- Add formatXML function to format single-line XML with proper indentation
- Format chartXml after fetching to ensure consistency
- Update replaceXMLParts to handle single-line XML with substring fallback
- Improve edit_diagram tool guidance with SEARCH/REPLACE best practices
- Add concrete examples to help AI use minimal, targeted edits
