xz
Verified people and dated competition rosters. Observations do not establish joining dates or credit for particular submissions.
Kaggle profile lists Competitions Master, one gold medal, three silver medals and five bronze medals; observed October 29, 2026. xz — public Kaggle profile, October 29, 2026
Kaggle competition history lists first of 4,186 teams in AI Agent Security – Multi-Step Tool Attacks. xz — Kaggle competition history
Kaggle competition history lists 341st of 1,427 in ARC Prize 2024 and 602nd of 1,455 in ARC Prize 2025. xz — prior ARC competition results
Published a first-place agent-security solution on September 2, 2026, describing throughput optimization under a fixed replay budget. This is a separate competition, not an ARC method disclosure. xz — September 2, 2026 winning write-up
Observed teams
- xz (ARC-AGI-3, 2026) · xiaoz259 · observed – Roster source