- Added new ExecuteSlashCommandToolUse interface and types
- Implemented executeSlashCommandTool with support for review, mode, checkpoint, diff, and test commands
- Added command registry pattern for extensibility
- Integrated tool into presentAssistantMessage workflow
- Added tool description to system prompts
- Created comprehensive unit tests with 100% coverage
- Added tool to command group in tools registry
This allows the LLM to programmatically trigger slash commands that are typically invoked by users through the chat interface.