How do I require a transpiled file in ts-node?

[STRd6]

Say I'm using CoffeeScript or another language that compiles to JS/TS alongside TypeScript. How do I configure ts-node to correctly import those files?

I've already configured esbuild to handle it (register a custom plugin) but I can't figure out how to hook in to the ts-node loader at the correct point to let ts-node find them.

// a.mts
import b from "./b.mts"
console.log(b)
import c from "./c.coffee"
console.log(c)

// b.mts
export default "typescript"

export default "coffee"

{
  "compilerOptions": {
    "module": "esnext",
    "moduleResolution": "node",
    "allowJs": true
  }
}

node --require coffeescript/register --loader ts-node/esm a.mts
TSError: ⨯ Unable to compile TypeScript:
a.mts:4:20 - error TS2307: Cannot find module './c.coffee' or its corresponding type declarations.

4 import * as c from "./c.coffee"

Any hints or tips?

[STRd6]

I got some help in the discord with the recommendation to use transpileOnly. This fixes the imports but at the cost of skipping out on typechecking the imports.