Thanks for the suggestion @redwoodsec .
We’ve already decided on the engine. We did look into alternatives and loved some of them. During review and testing, we liked that MW was really stable, actively maintained, and highly extensible. We’ve had no issues with bugs, lost content, or missing features. There is also a huge amount of information and examples available online for how to use and extend MW wikis, which is really helpful.
I don’t want to get into a direct comparison of wiki engines here. I will say that I’m really impressed with innovations in the wiki and PKM space, like wiki.js and SilverBullet. For this project specifically, MW ticked the most boxes and we have had no showstopping problems. It’s been a solid base for many successful wikis and we think it will be for this wiki too.