james.js

// james-coffee/index.js
var james  = require('james'),
    coffee = require('coffee-script'),
    fs = require("fs");

coffee.createStream = function() {
  return james.createTransformation(function(content, callback) {

    // Add header
    fs.readFile("header.js", function(err, header) {
      if (err) { // Where? }
      cb(header.toString() + content);
    });
  });
};

james.read('./hello.coffee')
  .transform(coffee.createStream)
  .write(process.stdout);