The code used to generate the sample values uses Math.random which cannot be initialized with a seed:

cf. https://github.com/Urigo/graphql-scalars/blob/master/src/mocks.ts

Would it be possible to copy this logic here to replace Math.random with something else, like:

https://github.com/michaeldzjap/rand-seed

and add a config option to initialize the seed to a fixed value and reset this on every query example maybe? That would be very helpful to generate static examples every time spectaql is executed.