Stella Power is the lead maintainer of the Coder Module, and she talks about the Coder Review module, which provides automated peer review evaluations of your code and sees if it complies with Drupal's coding standards, as well as the Coder Upgrade module, which helps you automatically upgrade your Drupal 6 module to Drupal 7. The coder upgrade module can't do everything automatically, and so there are a couple of handbook pages that shows a chronological list of Drupal API changes from 6.x to 7.x as they happened as well as a more user-friendly, categorical list of 7.x API changes that clusters them by the Drupal subsystem. The categorical list shows whether or not coder upgrade can either inform you of the change (green check), that it either is impossible or hasn't been done (red 'X') or that it's uncertain whether it's possible (yellow warning sign). Power also talks about all of the security checks that she's added to the coder module as a part of her education, and talks a bit a
