Passing parameters from a handler to middleware in a structured and descriptive way can be challe...

const handler = Effect.gen(function* () {
  const service = yield* MyService;
  const req = yield* HttpServerRequest.HttpServerRequest;
  
  const someImportantParameter = yield* MyService.getValue(/*Something out of my req*/);
  return ExampleSchema.make({foo: "bar"});
});

// Falls down to MiddleWare
const MWLive = Layer.effect(
  MWProtoType,
  Effect.gen(function* () {
    yield* Effect.logDebug("STARTUP: Creating MW Layer");
    return HttpApp.appendPreResponseHandler((_req, res) => {
      return Effect.gen(function* () {
        yield* Effect.logDebug("Entering MWLive");
       
        // HERE I WANT TO ACCESS someImportantParameter
        return res.pipe(...);
      })
  })
)

someImportantParameter