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arena

100 / 100 · Low risk

Fine to try.

By hashgraph-online/awesome-codex-plugins (GitHub) · coding · 1,568 stars · scanned at commit 3e1e6b2

Several subagents build the same artifact from one brief in isolation, a read-only judge scores them, and you pick a base and graft in the best parts of the rest. Use for "arena this", "competing attempts", "second opinion on this approach".

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=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/hashgraph-online/awesome-codex-plugins' "$d" && git -C "$d" checkout --quiet '3e1e6b20ffc28f42923e391f29f075c424e19e64' -- 'plugins/requie/endostack/skills/arena' && mkdir -p ~/.agents/skills && cp -R "$d"/'plugins/requie/endostack/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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