I think I know why this error occurs. It comes up not on codegen but on

graphql get-schema --project database

and only when there is only a collection element.

type Team {
  members: [Participant!]!
}

This will cause the error, but can be corrected if

name: String

(or the like) is added. But only after deleting the generated files. It may be down to the lack of unique ID also (which it should have)

thanks for digging @lancej! Can you report this so we can improve the experience here: https://github.com/graphql-cli/graphql-cli?

Will do

awesome thanks!