How do you think this would work?

npx prisma repl

and then you can just run some code?

Anyway, the first step would be to create a feature request in our issue. In this case you could link to your proejct as the "reference" for the idea.

Then we would discuss internally if this is something we can and want to have in our CLI.

And if we agree, we could open up the issue to community contributions... which would mean someone (hint hint) could then do a PR to Prisma CLI codebase to add this.