package.json

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "main": "test.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "remark": "5.0.1",
    "remark-html": "4.0.0",
    "remark-lint": "4.0.1",
    "remark-retext": "1.1.0",
    "retext": "2.0.0",
    "retext-equality": "2.3.0",
    "vfile-reporter": "1.5.0"
  }
}

test.js

var remark = require('remark');
var retext = require('retext');
var report = require('vfile-reporter');
var lint = require('remark-lint');
var html = require('remark-html');
var equality = require('retext-equality');
var remark2retext = require('remark-retext');

remark()
    .use(lint)
    .use(remark2retext, retext().use(equality))
    .use(html)
    .process('## Hey guys\n', function (err, file, doc) {
        if (err) {
            console.log(err);
            throw err;
        } else {
            process.stderr.write(report(file) + '\n');
            process.stdout.write(doc);
        }
    });