KList.scala

import cats.Show
import cats.instances.int._

implicit def hnil: HNil = HNil()
implicit def hcons[H, T <: HList](implicit h: H, t: T): H :: T = new ::[H, T](h, t)

trait HList
final case class HNil() extends HList
final case class ::[H, T <: HList](head: H, tail: T) extends HList

trait KList { type F[_] <: HList }
final class KNil extends KList { type F[A] = HNil }
final class :*:[H[_], T <: KList] extends KList { type F[A] = H[A] :: T#F[A] }

trait Instance[F <: KList] {
  type Type
  def value: Type
  def typeclass: F#F[Type]
}
object Instance {
  implicit def apply[A, F <: KList](a: A)(implicit A: F#F[A]): Instance[F] = new Instance[F] {
    type Type = A
    val value = a
    val typeclass = A
  }
}

trait F[_]
implicit val fInt: F[Int] = new F[Int] { }
type Ints[A] = A =:= Int

def f(l: Instance[Show :*: F :*: Ints :*: ({type L[X] = X <:< AnyVal})#L :*: KNil]*): Unit = ()

f(1, 2, 3)