There are probably a lot of tools that do this. The conventional-changelog[1] is one project, and it links out many others. AngularJS is a good example of a project that's been using that style for quite some time. I ended up using that as inspiration for my own tool (similar to yours) because as you mention, a lot of the pieces can be idiosyncratic to the project, and it turned out to be a relatively straight forward affair anyways. But if I were starting an open-source (node) project today, I'd probably just use the standard-version tools and forget about it.

[1]: https://github.com/conventional-changelog/conventional-chang...