You don't need to use Google at all. This would be a 20-minute project using the HN API. Twilio is a whole extra level of cruft. Any machine can send an email

You don't need to use Google at all. This would be a 20-minute project using the HN API. Twilio is a whole extra level of cruft. Any machine can send an email, so unless you want a voice call to tell you someone mentioned you on HN it makes absolutely no sense.