Charlie Hills
← All guides

Free guide · Claude & Claude Code

Arena: Make 100 Claudes fight for one answer

Arena makes up to 100 copies of Claude fight over your task until one answer is left. The install, the commands, what it costs, and our blind test: it won on a script and a caption, and lost on a hook.

Charlie Hills Added 28 October 2026 · Free

What’s inside

  1. 1How it works
  2. 2The strategy cards
  3. 3Install it (about 2 minutes)
  4. 4Run it
  5. 5What it costs
  6. 6When we tested it
  7. 7The fine print

How it works

  1. Spawn. Every copy gets your task, word for word, plus its own strategy card.
  2. Attack. Copies pair off. Each one attacks the other's answer: what's wrong, what it missed, the exact input that breaks it.
  3. Defend. Each side answers every attack and rewrites its answer to fix what it conceded.
  4. Judge. A separate judge scores both answers on a written rubric. The loser is out.
  5. Repeat. 100 becomes 50, then 25, 13, 7, 4, 2, 1.
  6. Final check. If you started from an answer you rejected, a last judge compares the winner with it, blind. It tells you the score even when your old answer wins.
    The judge's rubric, out of 100:

Correctness

Completeness

Holds up to the attacks

Specific

Clear

30

25

20

15

10

That’s the first part. The rest of this guide is free too.

More on Claude & Claude Code

Guide · 9 parts

Why your AI site looks cheap: 3 files and 2 tools

Claude guesses when you give it nothing. Three files (context.md, copy.md, design.md) give it the facts and two free tools give it taste. Real example files, the tested build prompt and the fixes.Read the guide →Guide · 9 parts

Find Skills: the Claude skill that finds the rest

Find Skills is a free Claude skill from Vercel that searches 1.5 million skills on skills.sh for you. The install command, the exact prompt I used, 10 prompts for marketers and how to spot a risky skill.Read the guide →Guide · 7 parts

The 6am Claude reset

Schedule a one-word hi on Haiku at 6am and Claude's 5-hour limit resets inside your work hours: three fresh limits in a 9-to-5 day instead of two. The 2-minute setup, the best time for your hours, and the fixes.Read the guide →Guide · 9 parts

Boris Cherny's 10 Claude Code Changes and What to Type

The 10 ways the person who built Claude Code changed how he uses it this year, what each one does for you, the exact thing to type and the 3-part prompt he uses now.Read the guide →Guide · 11 parts

How I Set Up My 5 Claude Connectors

Claude in Chrome, Gmail, Notion, Metricool and ElevenLabs: what I use each one for, the clicks to switch it on, the first prompt to paste and the fix when one goes quiet.Read the guide →Toolkit · 12 parts

Control What Claude Remembers: the close and system-audit skills

Both skills from the reel: close keeps the lessons from a good session, system-audit checks your whole Claude setup once a month. Install steps, the full files, real test runs, a claude.ai prompt for each, and how Claude memory works today.Read the guide →