Following along Jon Sterling live coding session (HoTTEST Summer School 2022); Incomplete and partial implemementation of elaboration up to definitional equality in Haskell using the Normalisation by Evaluation approach (NbE).
See: Andras Kovacs elaboration-zoo small-tt
Warning: currently most of the evalutation/elaboration functions are partial. Not fit for any purpose other than as an opportunity for refactoring.