We've had several other API tools engage us about using the Optic Changelog Spec in their products so we're going back to the basics with a repost from our July 8th, 2019 Problems with API Specifications. This is where Dev and I first shared Changelogs specs publicly :) Enjoy!
It's been over a year since Dev first came up with the idea to apply CQRS / Event Sourcing to modeling API behavior, and the idea has proven to be very robust. Since publishing the original form of this article, Optic has pivoted from a GUI for API contracts, to a code generator, then to an API spec generator, and finally to the "Git for APIs" tool that it is today. Don't worry -- you've shown us it's working, and we're sticking with it. No big pivots ahead.