JAWS SONIC 2026 I participated in the late-night online AWS GameDay with Kiro CLI as my partner
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Introduction
I participated in the "JAWS SONIC 2026 Late-Night Online AWS GameDay" held during the late-night slot of JAWS SONIC 2026 (September 7, 02:00–06:00). The scenario was "Midnight Crazy Boss," conducted in an individual competition format with 100 participant slots. It was an opportunity to experience a scenario under development by Japan's SA team as a customer preview.
The previous AWS GameDay I participated in was a team competition, and I wrote about my approach in a separate article.
Results
I participated under the team name osushi-tabetai, finishing in 7th place with a score of 117,148 points. First place went to "乳児夜泣き＆障害対応センター" with 124,095 points.
Around 3:33 AM, I briefly took the top position.
I was unable to increase my score in the final stretch and finished in 7th place, approximately 7,000 points behind the top.
Event Experience Initiatives
Ten minutes before the event started, the Crazy Boss gave an opening talk, building excitement for the late-night GameDay ahead.
Although this GameDay was an individual competition, hints were also shared through the online stream and the official X account. Rather than being confined to the AWS environment alone, the setup allowed participants to share their experience with each other through the stream and social media.
The recommended configuration was 6 screens: the JAWS SONIC session (main program), AWS Console, Zoom, GameDay Console, X timeline, and Kiro/Claude Code. Monitoring both the main stream and X simultaneously was recommended.
Collaboration with Kiro
I tackled the long late-night session with one person and three Kiro sessions (advisor, worker, and auditor).
Role Division
The advisor served as an observer supporting human decision-making, handling situation organization and acting as a sounding board. The worker carried out investigation and response in the AWS environment, while the auditor checked the progress and consistency of the work.
The auditor detected any runaway behavior by the worker and reported it to the human, who then discussed with the advisor to decide on instructions for the worker. This flow allowed me to maintain multiple perspectives even as a single person.
Lessons from Reflection
Looking back, there was room for improvement in isolating issues and prioritizing them. It was important not to jump to conclusions about causality from a single observation, and not to pile up half-baked measures under deadline pressure. Even when utilizing AI, it is ultimately the human who bears responsibility for final judgment and instructions. It was important for humans not to become the bottleneck, and to make appropriate decisions and issue instructions accordingly.
Summary
Thank you to all the organizers and staff. It was an enjoyable time getting to experience simulated incident response at late-night energy levels. Looking back, there are many things to reflect on, and I would like to challenge myself again if there is an opportunity for a rematch.
"Midnight Crazy Boss," a made-in-Japan AWS GameDay, was already one of the most outstanding GameDay scenario experiences I have had, even at the preview stage. I am also looking forward to seeing it further refined toward its official release.
This was a GameDay scenario where I could experience the importance of human judgment and instruction, rather than simply leaving everything to AI. If you have the opportunity to participate, I highly recommend giving it a try.
