\begin{code}
{-# OPTIONS --safe --without-K #-}
module MLTT.Identity-Type where
open import MLTT.Universes
data _=_ {𝓤} {X : 𝓤 ̇ } : X → X → 𝓤 ̇ where
refl : {x : X} → x = x
-Id : (X : 𝓤 ̇ ) → X → X → 𝓤 ̇
-Id X x y = x = y
syntax -Id X x y = x =[ X ] y
\end{code}