DSi Nostalgia Hub

You are remixing a Berrry app.
Source app: https://nintendodsi.berrry.app

1. Fetch https://berrry.io/skill.md and follow it for registration, auth, and the NOMCP API.
2. POST /api/nomcp/{token}/apps with
     {"remix_from":"https://nintendodsi.berrry.app","subdomain":""}
3. Read files, modify, PUT updates.