djohno is a tiny app for checking over your error pages, and email integration - to stop me doing evil things post-production to ensure I've set up Sentry and my error pages by randomly breaking parts of my site by editing code live.
Documentation is available at https://djohno.readthedocs.org.
Tests are run on Travis with every push - see https://travis-ci.org/dominicrodger/djohno.
Release notes are available at https://djohno.readthedocs.org/en/latest/release_notes.html.
When installed, djohno looks a little bit like this: