Recently we have had a number of community members ask us for suggestions for contributing back to the Bro Project. We have updated the Community page on our website to reflect the new options available.
Custom Scripts and/or Plugins
We encourage Bro users to make their custom scripts and/or plugins available to the community by creating a package and submitting it to the Bro Package Source. See the README file of that GitHub repo for more instructions on how to create a package and submit it. Once your package is accepted, it becomes installable via the Bro Package Manager.
Patches and New Functionality
For working on the Bro codebase itself, work from our official GitHub mirrors or clone the master bro.org repositories directly from git://git.bro.org/<repo>. See our contribution guidelines for more information.