Directives on root Query/Mutation/Subscription types

[psteinroe]

I'm submitting a...

[ ] Regression 
[ ] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

Currently, the schema is generated with

type Query {}

Because of an issue with mercurius, I need to add a directive to the root types, meaning that the schema should be

extend type Query {}

or

type Query @extends {}

Expected behavior

I cannot find a way to add directives to the root types using the code-first approach.

What is the motivation / use case for changing the behavior?

Its a really specific issue, so the motivation is mainly to be able to use mercurius federation.

[kamilmysliwiec]

Please search through some of our old issues on this (this has been discussed several times in the past).