This prints `{"bar":"lorem"}`:

@Serializable
	data class Foo(@Transient val bar: String)
	
	println(Json.stringify(Foo.serializer(), Foo("lorem")))

Do I miss anything about

@Transient

?

Probably you've imported kotlin.jvm.transient instead of kotlinx.serialization.Transient

that's correct, thank you. The other one is available globally, so there was no prompt for the import selection 😏