This repo contains code for a ModMark package with a module called [lorem]. It is mostly a proof-of-concept that it does work to create a module in Swift.
Install SwiftWasm on your platform and use SwiftPM to build the product in this folder.
On macOS, xcrun --toolchain swiftwasm swift build --triple wasm32-unknown-wasi -c release may work. It might be a good idea to run wasm-opt to reduce the binary size.
You can test this by supplying example.json to stdin, like cat example.json | swift run lorem transform lorem html.