To help emulate Kotlin's strong typing, use 'brand typing' to specify primitives and value classes. Otherwise TypeScript doesn't discriminate between UInt and Long

Builtin primitives should be handled

type Byte = number & { __kotlin_byte__ : void};

Value classes too

package my.package

@Serializable
@JvmInline
value class UserCount(private val count: UInt)

Something like this...

type UInt = number & { __kotlin_uint__ : void};

type UserCount = UInt & { __my_package__usercount__ : void};