JA Zenn (mazrean)·Practitioner post·

ISUCON 2026: dropping my tooling for coding agents

ISUCON2026 にツールを捨てて勝ちたかった

English summary

Rehearsal: Claude Code alone took ISUCON14 to about 800k in about 3h until the benchmarker was the bottleneck (2.9m after hardware upgrade). Real contest 198,146 (about 40-50th of about 600); the 2026 problem was designed so operator judgement still separated teams. Pair with ojey writeup and known tak848/kauche posts as the ISUCON-2026 agent cluster.

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