I can't "just" use Typescript, as that would take awhile to set up and convert my project. I'm just trying to find the documentation.

IntelliJ/Atom/VS Code should still be able to give intellisense. afaik there is no official documtation about the exact commands (which would be nice, but IMO figuring it out from the completions is quite simple)

You can also open the GraphQL Playground available at the Prisma endpoint. It explains exactly what the arguments look like.

I'm using VS Code and it doesn't show intellisense that explains the possible options of the

where

parameter, and I'm also using GraphQL Playground but don't see anything about Prisma in there

Are you running Prisma locally or via the demo server?

Demo server for now