Nice work. How do you handle concurrent writers on a single file? That's where embedded databases usually get tricky, and the graph model makes locking even more interesting.

Within the same process it's enforced at the db level. After reviewing the code more I see we don't have a mechanism in place to manage safety across processes. Will add a file lock mechanism tonight. Great call out!

In general though, the goal for this was single writer multiple readers. That was a design decision to keep things simple.