It has a Sketch plugin that does a rather competent job of converting Sketch layers/groups into components. (For example, you can prefix a Sketch group with "c:", and React Studio will interpret it as a component.)
Here is a live video demonstrating the Sketch -> React Studio -> React code workflow: https://www.youtube.com/watch?v=Rfd7zmlFZw8
(It's in realtime with detailed explanations, so it runs about 40 minutes.)
Disclaimer: I wrote a pile of code for React Studio.
I think it would be super cool if React Studio could automatically create a GraphQL api based on the structure of the component data.
We are already doing small experiments in this direction at Graphcool (for example graphql-up https://www.graph.cool/graphql-up/)
Do you think anyone at Reract Studio would be interested in talking more about this? They can ping me at email@example.com :-)
Ideally, with a perpetual license with 1-year of free upgrades.