Hiroki worked on the openclaw/openclaw repository, delivering a cross-platform mention matching reliability feature that improved how mentions are detected across Discord, Slack, and Telegram. By ensuring that custom mention patterns are always checked, even when explicit mentions are present, Hiroki enhanced the consistency and accuracy of notification handling. The implementation involved backend development and API integration using TypeScript, with a strong emphasis on updating and expanding tests to cover platform-specific edge cases. This approach reduced incorrect mentions and future-proofed the feature, demonstrating careful attention to cross-platform compatibility and robust testing practices within a focused development timeframe.