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arena

100 / 100 · Low risk

Fine to try.

By jsartisan/frontend-challenges (GitHub) · design · 90 stars · scanned at commit 630c44b

Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for /arena, 'arena this', 'throw it in the arena', or when one attempt at a non-trivial artifact would lock in the wrong shape.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'arena' ] || [ -L ~/.agents/skills/'arena' ]; then echo 'A skill folder named arena already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/jsartisan/frontend-challenges' "$d" && git -C "$d" checkout --quiet '630c44b299f1467e789d561da3785cfd99247ed0' -- '.claude/skills/arena' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/arena' ~/.agents/skills/'arena' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'arena' ~/.claude/skills/'arena' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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