I've made Sitrec (Metabunk's situation recreation tool) open source.
This means anyone can look at the source code to see how it works. You can also make you own version of the code, install it on your own server, make changes to the code, and request your changed be merged in with Metabunk's version.
The link above goes to the home page for Sitrec on Github. It will show you the top level view of the code, and a variety of menus and links.
"Readme" (or just scrolling down a bit) will give you instructions on how to build the code and install it on your own server.
"Activity" will show the most recent published changes to the code:
"Issues" will take you to the issue tracking database. Here you can report bugs, make suggestions, or request new features