- Created new TUI component library with renderStatusLine, renderOutputBlock, renderCodeCell, renderFileList, and renderTreeList utilities for consistent tool output rendering.
- Refactored 13+ tools to use centralized TUI components, replacing inline theme formatting and ToolUIKit class usage with declarative component APIs.
- Moved tree rendering utilities (getTreeBranch, getTreeContinuePrefix) from tool render-utils to TUI module for improved code organization.
- Streamlined render function return types across tools from Text to Component objects with render/invalidate methods for better state management.
- Fixed file descriptor leak in OutputSink when write fails
- Fixed isError flag not propagating to UI for grouped tool calls
- Fixed Python streaming updates during cell execution (missing onChunk)
- Fixed ls icon detection broken by age suffix in entry names
- Added Tool Output Infrastructure section to DEVELOPMENT.md