Development currently happens on a private mono-repo with all sorts of stuff in it - including for the SaaS environment yes, and bits left over from when Grist started out initially as a stand-alone desktop app, and so on. Commits are pushed to grist-core about once a week, using git subtree. If you look at commit history, you'll see plenty of features going in month after month. Since we currently develop elsewhere, you'll see few pull requests on github. Internally we use phabricator, which is deprecated now, so we'll need to rejigger our setup soon. It would definitely be good to get more of the development process out there, especially now more people have found us!

Thanks for the insights! I'm trying to support different workflows and hearing about yours helps.