You need two things:

1. A Claude Pro account ($20/month)

Go to claude.ai and sign up for Claude Pro if you haven't already. The free tier won't work — you need "Code Execution and File Creation" enabled, which is a Pro feature.

If you already have Claude Pro, skip to the next step.

2. Code Execution turned on

Once you're logged into Claude Pro: → Click your profile icon (bottom left) → Go to Settings → Go to Capabilities → Toggle ON "Code Execution and File Creation"

That's it for prerequisites. Everything else gets installed automatically the first time you use the skill.