sorry, could it be that I'm missing something when I try to set this up? my schema doesn't seem to pick up the unboxing the value class:

@JvmInline
value class BookId(
    val v: String
)

the value unboxer definition:

open class BookIdValueUnboxer : ValueUnboxer {
    override fun unbox(`object`: Any?): Any? = if (`object` is BookId) {
         // log.debug { "Unboxing value: $`object`" }
        `object`.v
    } else {
        `object`
    }
}

and the registration to the GraphQL instance:

GraphQL
     .newGraphQL(schema)
     .valueUnboxer(BookIdValueUnboxer())
     .build()

hi 👋 sorry for the delay, it looks like inline value class may require some additional changes to make it work