- Extend ParsedMessage.meta with toolInput to expose raw tool arguments
- Add toolUseRegistry to correlate tool_result blocks back to originating tool_use
- Set toolInput on tool_call messages and populate meta.toolName/toolInput on tool_result
- Fix tool_result with is_error:true now correctly produces type "error"
- Add catch-all for unknown top-level event types (emits system message)
- Add catch-all for unknown assistant content block types (emits system message)
- Add unit tests covering all 8 scenarios including regression cases
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
