Hindsight: Typesafe, Evolvable Event Sourcing for Haskell October 28, 2025 A month and a half ago, at Munihac 2025 , I had the pleasure to present the design of Hindsight , an opinionated event sourcing library I was working on. While I had hoped to make the repository public and gather contributions during the Hackathon, I still felt the project was a bit too early for prime time: the user-facing…