There is now a complete plugin development tutorial for NetBox v3.2! This detailed guide walks through the entire process of creating a custom plugin for managing simple access lists in NetBox.
The guide is arranged into ten consecutive sections, each of which focuses on a major component of NetBox's plugins framework. It also includes a companion repo which contains a snapshot of the completed code at each step. This allows readers to easily pick up from any step and focus on a particular subject.
Although NetBox v3.2.0 is still a couple weeks away (scheduled for release the week of Aptril 4th), we don't anticipate any more major changes to the new plugins framework. You can get started with plugin development right now using the most recent beta release!. The guide will be updated over time as future NetBox releases continue to expand the plugins framework.