Is it possible to register user assistants in Ghost?

Question

I use Ghost as an npm module after this guide .

I would like to add some custom helpers that can be used inside my themes. Is there a way to do this without changing the code inside the Ghost module?

This is my current code:

const ghost = require('ghost'); const path = require('path'); const hbs = require('express-hbs'); const config = path.join(__dirname, 'config.js'); const coreHelpers = {}; coreHelpers.sd_nls = require('./sd_nls'); // Register a handlebars helper for themes function registerThemeHelper(name, fn) { hbs.registerHelper(name, fn); } registerThemeHelper('sd_nls', coreHelpers.sd_nls); ghost({ config: config }) .then(ghostServer => ghostServer.start()); 

I think one of the possible problems is that my hbs is a new instance of handlebars and not the one used by Ghost, so when Ghost is running it does not contain any helpers that I registered.