parse-dont-validate
There are 2 repositories under parse-dont-validate topic.
cpressey/LCF-style-ND
Exposition of an LCF-style theorem prover for propositional logic in a Natural Deduction system
catseye/Castile
MIRROR of https://codeberg.org/catseye/Castile : A simple imperative language with union types (and a compiler for same, with multiple targets)