Announcing pandoc-logic-proof: A pandoc filter that provides a Markdown extension for logic proofs. This package has been available from my repo for a while, but I have now uploaded it to Hackage, and also made it available as a Nix flake.
Hackage: https://hackage.haskell.org/package/pandoc-logic-proof
Repo: https://github.com/mhwombat/pandoc-logic-proof