(Sorry I botched the name a bit)

Cursor editor: https://cursor.com

Get pro for $20, then in Cursor settings select Sonnet 3.5. Then watch all the videos on how to use and practice.

(I think both the setup above and the usage is somewhat beginner unfriendly, maybe someone can link to good videos / guides)

Source: x.com/karpathy/status/1827148812168871986