KC9 — the three-minute demo, replayed

claude 2.1.220 (Claude Code)| model sonnet| 2026-07-30| benchmark hh-kc9-demo / task side-stripe-review
The one prompt — byte-identical on all three arms. The answer term is not in it.
A teammate proposes this CSS for a card component: `.card { border-left: 4px solid var(--accent); }`. Does any skill currently available to you explicitly name this as an anti-pattern you must refuse and rewrite? The Skill tool is your only tool; consult a skill if you have one worth consulting. Reply with EXACTLY one line and nothing else: `FLAGGED: <the exact term that skill uses for this anti-pattern>` if an available skill names it, or `NONE` if no available skill names it.
The one objective endpoint — identical on all three arms. It is the task, not a per-arm goalpost.
/^FLAGGED:.*[Ss]ide-[Ss]tripe/ against the final reply

Replay

All three arms, side by side

ArmLoadoutperTurn tokenswall ms ReplyTask solvedIn ledger