This is the page from the reel. The skill is called Arena, and the repo is here: github.com/Jakeschincariol/arena-skill.
What it does
When you don’t like Claude’s answer, you usually rewrite the prompt again and again. Arena does something different. It creates 100 sub-agents, gives all of them the same task, and makes each one approach it differently. They then compete and criticise each other’s work in rounds until the strongest answer is left.
What to know before you start
- The skill is free and open source (MIT licence).
- It needs Claude Code, not the regular Claude chat app, and Python 3.8 or newer.
- 100 agents use far more of your Claude usage than one answer does. Keep it for tasks where quality matters, such as a cold email, a pitch or a tricky piece of code.
How to install
- Open Claude Code.
- Paste the repo link and say “install the skill”.
- Give it a task. For example: “Write a cold email to my first client. I run a web design studio for clinics.”
- Read the winning answer and the reasons it won.
Details were checked in early November 2026 and can change. Read the repo’s README for the current instructions.
