Standardize deployment
Patch contributors want their changes to go live as soon as possible.
Apply consistent code conventions
Different styles may cause headache in the long run.
Write tests and turn CI on
Decreasing chances of accidentally breaking something would greatly encourage occasional contributors.
Remove dead code
To make easier to see at a glance what is being run and what isn't.
Document how to set up a development environment
So that patch contributors can test their changes locally before submitting them for review.
Use detailed commit messages
Too many "misc"s, don't you think?
Split reusable components into standalone libraries
Not to reinvent the wheel!
Add internationalization (T110161)
Essential to reach a broader audience.
Do a security review
Many people rely on Magnus' tools.